当前位置: 2022年
<RECORD 1>
Accession number:20221211817928
Title:Weak Incoherent Optical Signal Amplification Based on Modulation Instability for Imaging Through Fog (Open Access)
Authors:Wang, Zhaolu (1); Zhang, Yongbin (1, 3); Huang, Nan (1); Liao, Yuan (1); Zhang, Changchang (1); Gao, Xiaohui (2); Liu, Hongjun (1, 4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xian Institute of Optics and Precision Mechanics, CAS, Xian; 710119, China; (3) China Airborne Missile Academy, Luoyang; 471009, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding authors:Wang, Zhaolu(wangzhaolu@opt.ac.cn); Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:2
Issue date:April 1, 2022
Publication year:2022
Article number:7821205
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Weak optical signal processing based on nonlinear effects offers new approaches for imaging through scattering media. A novel incoherent optical signal amplification method based on spatial modulation instability is proposed for imaging through fog. We experimentally demonstrated the amplification and recovery of degraded weak incoherent optical image signals after passing through dense fog in a photorefractive crystal. Our experimental results indicate that the intensity profiles of the output images can be redistributed from disordered to ordered when the nonlinear strength exceeds the threshold of incoherent modulation instability, which shows that the partially disordered incoherent probe light intensities are orderly transferred to enhance the signal intensity profiles and the residuals become a uniform background. The restored nonlinear output images with high visibility were observed for a proper optical thickness of fog, and weak optical imaging from undetectable to detectable with relatively poor visibility for a larger optical thickness was also realized in the experiment. This incoherent optical signal amplification method based on modulation instability has a potential application for image recovery in atmospheric scattering imagings.<br/></div> © 2009-2012 IEEE.
Number of references:24
Main heading:Modulation
Controlled terms:Nonlinear optics - Geometrical optics - Optical signal processing - Stability - Fog - Amplification - Image enhancement - Visibility
Uncontrolled terms:Disordered - Incoherent optical amplification - Modulation instabilities - Optical amplifications - Optical diffractions - Optical imaging - Optical scattering - Scattering imaging - Spatial modulation instability - Spatial modulations
Classification code:443.1 Atmospheric Properties - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.2 Vision
DOI:10.1109/JPHOT.2022.3158653
Funding details: Number: QNLM2016ORP0111, Acronym: -, Sponsor: -;Number: 61775234,61975232, Acronym: -, Sponsor: -;Number: 2020398, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:Thisworkwas supported in part by theQingdaoNational Laboratory for Marine Science and Technology under Grant QNLM2016ORP0111, in part by NationalNatural Science Foundation underGrants 61975232 and 61775234, and in part by Youth Innovation Promotion Association CAS under Grant 2020398.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 2>
Accession number:20223312573915
Title:Phase regeneration of 8PSK signal using phase-sensitive amplification based on an organic-Ge hybrid waveguide
Authors:Ren, Li (1); Li, Xuefeng (2); Wu, Xiao (1); Liu, Hongjun (3)
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) School of Science, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (3) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Xuefeng(lixfpost@163.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:24
Issue date:August 20, 2022
Publication year:2022
Pages:7095-7101
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We numerically demonstrate the phase regeneration of eight-phase-shift keying (8PSK) in an organic-Ge hybrid waveguide with 10 μm length. Through filling graphene oxide with a high Kerr coefficient and engineering of waveguide dimensions, an ultrahigh nonlinear coefficient with 5.86x106 W-1 m-1 is attained at 1550 nm. The phase regeneration of 8PSK signal is achieved by using phase-sensitive amplification of the dual-conjugated-pump degenerate four-wave mixing scheme. The error-vector magnitude (EVM), optical signal-to-noise ratio, as well as constellation diagrams of 8PSK signal are also used to evaluate the phase regeneration capacity quantitatively. A reduction of EVM from 39.25% to 1.34% for 8PSK signal is found. The results show great phase regeneration and noise-squeezing ability, which indicate that such a phase-sensitive amplifier of a waveguide can find critical promising applications in all-optical signal processing.<br/></div> ©2022 Optica Publishing Group.
Number of references:29
Main heading:Signal to noise ratio
Controlled terms:Four wave mixing - Germanium compounds - Graphene - Waveguides
Uncontrolled terms:Eight phase shift keying - Error vector - Graphene oxides - Hybrid waveguides - Kerr coefficient - Organics - Phase regeneration - Phase-sensitive amplifications - Vector magnitude - Waveguide dimensions
Classification code:714.3 Waveguides - 716.1 Information Theory and Signal Processing - 761 Nanotechnology - 804 Chemical Products Generally
Numerical data indexing:Percentage 3.925E+01% to 1.34E+00%, Size -1.00E00m, Size 1.00E-05m, Size 1.55E-06m
DOI:10.1364/AO.463018
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 3>
Accession number:20224513067987
Title:Tolerance enhancement of inefficient detection and frequency detuning by non-perfect phase-sensitive amplification in broadband squeezing-based precision measurement
Authors:Zhang, Changchang (1, 2); Wang, Zhaolu (1); Liu, Hongjun (1, 3); Huang, Nan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100084, China; (3) Collabotative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:39
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2657-2664
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Phase-sensitive amplification (PSA) can significantly improve the degradation caused by inefficient detectors in squeezing-based precision measurements. However, broadband incident light will lead to non-perfect PSA. The present work focused on the enhancement of non-perfect PSA for squeezed states with broad bandwidth for the measurement of weak absorption detection. Numerical calculations of the quantum advantage show that non-perfect PSA can effectively improve the inefficiency of detection in slight drift frequency detuning.<br/></div> © 2022 Optica Publishing Group.
Number of references:29
Main heading:Incident light
Uncontrolled terms:Broad bandwidths - Frequency detuning - Incident light - Inefficient detectors - Measurements of - Numerical calculation - Phase-sensitive amplifications - Precision measurement - Squeezed state - Weak absorption
Classification code:741.1 Light/Optics
DOI:10.1364/JOSAB.469228
Funding details: Number: 61975232, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61975232).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 4>
Accession number:20223812764504
Title:Three-dimensional quantum droplets in spin-orbit-coupled Bose-Einstein condensates
Authors:Xu, Si-Liu (1); Lei, Yun-Bin (1); Du, Jin-Ting (1); Zhao, Yuan (1); Hua, Rui (2); Zeng, Jian-Hua (3)
Author affiliation:(1) School of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning; 437100, China; (2) School of Mathematic and Statistic, Hubei University of Science and Technology, Xianning; 437100, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Corresponding author:Hua, Rui(earlyhua@hbust.edu.cn)
Source title:Chaos, Solitons and Fractals
Abbreviated source title:Chaos Solitons Fractals
Volume:164
Issue date:November 2022
Publication year:2022
Article number:112665
Language:English
ISSN:09600779
CODEN:CSFOEH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Quantum droplets (QDs) are a recently discovered new state of matter in ultracold atoms. We study three-dimensional (3D) self-trapped modes in spinor Bose-Einstein condensates with spin-orbit coupling (SOC), described by coupled Gross-Pitaevskii equations including beyond-mean-field Lee-Huang-Yang terms. The 3D QDs, semi-vortex and mixed-mode states, of a large size with an anisotropic density profile, exist with a wide large values of the norm as the Lee-Huang-Yang terms eliminate the collapse. The effect of the intra- and inter-component of the nonlinearity and SOC on characteristics of the QDs is systematically addressed. Using the linear-stability analysis and direct simulations, we have checked the stability of all the 3D QDs states, stressing they are stable against small perturbations in propagation in limited scales. The present analysis opens a new way for creating multidimensional solitary waves, and may be developed in other directions, including nonlinear optics, not only in conservative, but also in dissipative systems.<br/></div> © 2022 Elsevier Ltd
Number of references:37
Main heading:Drops
Controlled terms:Bose-Einstein condensation - Control nonlinearities - Linear stability analysis - Nonlinear optics - Solitons - Statistical mechanics - Vortex flow
Uncontrolled terms:Bose-Einstein condensates - Lee-huang-yang interaction - Mixed mode - Mixed-mode soliton - Quantum droplet - Semi-vortex soliton - Spin orbits - Spin-orbit couplings - States of matter - Vortex solitons
Classification code:631.1 Fluid Flow, General - 731.1 Control Systems - 741.1.1 Nonlinear Optics - 921 Mathematics - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.1016/j.chaos.2022.112665
Funding details: Number: 12074423,61690222,61690224,62275075, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: HEBUST, Sponsor: Hubei University of Science and Technology;
Funding text:The authors thanks Dr. Chunbo Hua of Hubei University of Science and Technology for his help in the discussion and English writing. This work was supported by the National Natural Science Foundation of China ( 62275075 , 61690222 , 61690224 , 12074423 ).The authors thanks Dr. Chunbo Hua of Hubei University of Science and Technology for his help in the discussion and English writing. This work was supported by the National Natural Science Foundation of China (62275075, 61690222, 61690224, 12074423).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 5>
Accession number:20224212975942
Title:Orbital angular momentum in optical manipulations
Authors:Li, Manman (1); Yan, Shaohui (1); Zhang, Yanan (1); Zhou, Yuan (1); Yao, Baoli (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:24
Issue:11
Issue date:November 2022
Publication year:2022
Article number:114001
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Since Allen et al recognized that light beams possessing a helical phase structure can carry orbital angular momentum (OAM), OAM of light has witnessed groundbreaking developments and has founded tremendous applications in a broad range of fields. In this article, beginning with a general introduction to OAM, basic theories, and computational approaches, we provide an overview on recent advances in optical manipulation with OAM. Owing to the distinct characteristics of OAM beams feature, i.e. helical wave front, doughnut intensity profile and certain OAM per photon. Optical manipulation using OAM has demonstrated innovative landscapes, realized the manipulation of particles with different functions ranging from optical spanner, manipulating of low-refractive-index particles, optical sorting and guiding, up to optical spin-orbit interaction and chiral discrimination. This review will be helpful for understanding the mechanisms behind light-matter interaction.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:224
Main heading:Refractive index
Controlled terms:Angular momentum - Computation theory - Screening - Wavefronts
Uncontrolled terms:Basic theory - Computational approach - Helical phase - Helical wave fronts - Light beam - Optical force - Optical manipulation - Orbital angular momentum - Orbital angular momentum of light - Spin angular momentum
Classification code:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 741.1 Light/Optics - 802.3 Chemical Operations
DOI:10.1088/2040-8986/ac9192
Funding details: Number: 11904395,11974417, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2021YN13,ZDBS-LY-JSC035, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This research is supported by the National Natural Science Foundation of China (NSFC) under Grant Nos. 11904395 and 11974417, the Key Research Program of Frontier Sciences, CAS, Grant No. ZDBS-LY-JSC035, and the CAS ‘Light of West China’ Program under Grant No. XAB2021YN13.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 6>
Accession number:20225213303318
Title:Numerical Study of Broadband Wavelength Conversion Based on InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> Strip-loaded Waveguide
Title of translation:基于InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf>加载条状波导的宽带波长转换数值研究
Authors:Wen, Jin (1, 2); He, Chenyao (1); Qin, Weijun (1); Sun, Wei (1); Liang, Bozhi (1); Xiong, Keyu (1); Zhang, Hui (1); Wu, Zhengwei (1); Yu, Huimin (1); Wang, Qian (1)
Author affiliation:(1) School of Science, Xi'an Shiyou University, Xi'an; 710065, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wen, Jin(wenjin@xsyu.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:10
Issue date:October 2022
Publication year:2022
Article number:1019003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years， nonlinear integrated optical devices have shown great potential in all-optical signal processing， and a lot of research work has been done on them. The nonlinear integrated optical devices usually use silicon， Ⅲ-Ⅴ， chalcogenide glass and other materials platform. Silicon has very sophisticated low-cost manufacturing platforms， but silicon is an indirect band-gap list of semiconductor materials with very low luminous efficiency， and silicon needs to be integrated with other materials， for example， the integration of Ⅲ-Ⅴ lasers and amplifiers on a silicon substrate to achieve integrated optical path， which makes the integrated optical path complex and expensive， and has compatibility problems. As<inf>2</inf>Se<inf>3</inf> chalcogenide glasses stand out among many materials because of their low linear and nonlinear loss， but their refractive index can not be adjusted within a certain range， which is not conducive to the flexibility of all-optical signal processing. The As<inf>2</inf>Se<inf>3</inf> chalcogenide glass platform is not compatible with the Complementary Metal-oxide Semiconductor （COMS） process， and the fabrication process is complex. Various ternary and quaternary Ⅲ-Ⅴ compounds with different bandgap wavelengths can form a group of nonlinear photonic materials that can cover the whole spectrum window from ultraviolet to infrared. Ⅲ-Ⅴmaterials can improve the flexibility of custom-made integrated optical devices by changing the components of different materials， within a certain range. Ⅲ-Ⅴ semiconductor platforms enable active and passive integrated optical devices to be combined on the same material platform， which can be achieved by careful design and advanced manufacturing methods， for example， multilayer epitaxy and vertical coning. Ⅲ-Ⅴ semiconductor waveguides have high nonlinear coefficients， and minimal nonlinear absorption can be achieved by selecting the appropriate material composition and operating wavelength. Recent studies have shown that the carrier lifetime of Ⅲ-Ⅴ list of semiconductor materials can be reduced to 0.42 ps， which can reduce the nonlinear loss in the communication band and has the potential for efficient wavelength conversion. In this paper， an InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> strip-loaded waveguide is optimized and designed. The high efficiency broadband wavelength conversion is realized by zero phase mismatch of the waveguide from 1.53 μm to 1.59 μm. The waveguide has good nonlinear optics characteristics with a high Kerr coefficient of 2.2×10<sup>-17</sup> m<sup>2</sup>/W. The wavelength conversion with 35 nm bandwidth and peak conversion efficiency of -26.7 dB is realized in the optimized waveguide structure. The influence of the doping coefficient y of In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> on the wavelength conversion is discussed. The numerical results show that when the pump power and the pump wavelength are constant， with the doping coefficient y decreasing， the effect of the doping coefficient y on the wavelength conversion of In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> on the wavelength conversion of In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> is obvious， the conversion bandwidth is increased. In addition， the peak conversion efficiency of the waveguide is increased by increasing the pump power while the pump power is kept constant， and the band of the Idle Light is redshifted with the redshift of the pump wavelength. At the same time， the optimum length of InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> strip-loaded waveguide is 5 mm by analysis and numerical simulation. Wavelength converter based on InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf> waveguide platform has important application value in optical communication， optical sensing and other fields.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:25
Main heading:Indium phosphide
Controlled terms:Carrier lifetime - Chalcogenides - CMOS integrated circuits - Efficiency - Energy gap - Four wave mixing - Glass - III-V semiconductors - Integrated optics - MOS devices - Optical signal processing - Optical waveguides - Oxide semiconductors - Photonic integration technology - Refractive index - Selenium compounds - Semiconducting indium phosphide - Semiconductor lasers - Substrates
Uncontrolled terms:All-optical signal processing - Chalcogenide glass - Four-wave-mixing - InP/in1-xgaxasyP1-y - Integrated optical devices - Nonlinear loss - Optical path - Pump power - Pump wavelength - Strip-loaded waveguides
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 712.1 Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.4.1 Semiconductor Lasers - 804.2 Inorganic Compounds - 812.3 Glass - 913.1 Production Engineering
Numerical data indexing:Decibel -2.67E+01dB, Size 1.53E-06m to 1.59E-06m, Size 2.20E-17m, Size 3.50E-08m, Size 5.00E-03m, Time 4.20E-13s
DOI:10.3788/gzxb20225110.1019003
Funding details: Number: 2018KJXX‒042, Acronym: -, Sponsor: -;Number: 61505160, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2019JM‒084, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 61505160）， the Innovation Capability Support Program of Shaanxi （No.2018KJXX‒042）， the Natural Science Basic Research Program of Shaanxi （No. 2019JM‒084）， State Key Laboratory of Transient Optics and Photonics （No.SKLST202108），the Graduate Innovation and Practical Ability Training Project of Xi'an Shiyou University （No.YCS20211075）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 7>
Accession number:20220711620666
Title:A porous core Zeonex THz fiber with low loss and small dispersion
Authors:Mei, Sen (1, 2); Kong, Depeng (1); Mu, Qiyuan (1, 2); Li, Wenlong (1, 2, 3); He, Zhengquan (1); Wang, Lili (1); Zhang, Yani (4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shanxi Province; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an; Shaanxi Province; 710049, China; (4) School of Arts and Sciences, Shaanxi University of Science & Technology, Xi'an; Shaanxi Province; 710021, China
Corresponding author:Kong, Depeng(kongdp@opt.ac.cn)
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:69
Issue date:March 2022
Publication year:2022
Article number:102834
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A fabricated microstructured polymer optical fiber (MPOF), with porous core and porous cladding consisting of a hexagonal array of circular air-holes, is experimentally investigated via a terahertz (THz) time-domain spectroscopy (TDS) setup. The fiber features a low propagation loss ranged from 0.0180 to 0.0345 cm<sup>−1</sup>, in the frequency regime of 0.3–0.5 THz with diameter of 3 mm. Meanwhile, the dispersion and fabrication deformation are also discussed. Experimental results show there is a flat and near-zero dispersion band in the range of 0.39 to 0.45 THz with a value of −0.285 ± 0.02 ps/THz/cm The simulation and experimental results of transmission loss and dispersion are in good agreement within 0.3–0.5 THz. There are a few deviations regarding air porosity between theoretical and actual structure, and the absolute variation of air hole fraction in core and cladding is 0.485% and 1.657%, respectively. The proposed MPOF is potentially useful for efficient and convenient transmission of broadband THz radiation.<br/></div> © 2022 Elsevier Inc.
Number of references:29
Main heading:Microstructure
Controlled terms:Terahertz spectroscopy - Terahertz waves - Dispersion (waves) - Optical fiber fabrication - Plastic optical fibers - Wave transmission
Uncontrolled terms:Circular air-holes - Frequency regimes - Hexagonal arrays - Low propagation loss - Low-loss - Near-zero dispersions - Small dispersion - Tera Hertz - Terahertz propagation - Terahertz time-domain spectroscopy
Classification code:711 Electromagnetic Waves - 741.1.2 Fiber Optics - 931.1 Mechanics - 951 Materials Science
Numerical data indexing:Frequency 3.00E+11Hz to 5.00E+11Hz, Frequency 3.90E+11Hz to 4.50E+11Hz, Percentage 1.657E+00%, Percentage 4.85E-01%, Size 1.80E-04m to 3.45E-04m, Size 3.00E-03m, Time 2.85E-13s
DOI:10.1016/j.yofte.2022.102834
Funding text:This work is supported by the following fundings: National Natural Science Foundation of China (NSFC) (62071465); Key Research and Development Plan of Shaanxi Province (2021GY-048); Youth Talent Lift Project of Xi'an Science and Technology Association (095920201317).Thank collaborators Yuan Yuan and Tian Ma for help in experimental data analysis and manuscript polishing in this work.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 8>
Accession number:20221511946265
Title:Single underwater image restoration based on descattering and color correction
Authors:Ke, Ke (1, 2, 3); Zhang, Chunmin (1, 2); Tang, Qian (1, 2); He, Yifan (1, 2); Yao, Baoli (3)
Author affiliation:(1) School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China; (2) The Institute of Space Optics, Xi'an Jiaotong University, Xi'an; 710049, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Zhang, Chunmin
Source title:Optik
Abbreviated source title:Optik
Volume:259
Issue date:June 2022
Publication year:2022
Article number:169009
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Underwater images typically exhibit color distortion and low contrast due to the absorption and scattering of the non-uniform medium during the propagation of light underwater. To address these problems, an effective underwater image restoration method is presented in this paper. Firstly, we adopted an adaptive dark channel prior that can be applied to underwater images with different color tones. Then, the local water light with strong robustness is obtained by utilizing maximum filtering and Gaussian low-pass filtering. Additionally, a linear relationship between blurred and clear images in the dark channel was introduced combining with the attenuation coefficient compensation to estimate the transmission of r, g and b channels. Ultimately, we designed a new adaptive color compensation method by taking into account the attenuation difference of the three color channels. Simulation and experimental results show that the proposed method can effectively improve the clarity and contrast of the image and eliminate color distortion.<br/></div> © 2022 Elsevier GmbH
Number of references:37
Main heading:Image reconstruction
Controlled terms:Underwater imaging - Image enhancement - Restoration - Color - Low pass filters
Uncontrolled terms:Absorption and scatterings - Adaptive dark channel - Color distortions - Colour corrections - Dark channel priors - Local water light - Low contrast - Non-uniform - Propagation of lights - Restoration methods
Classification code:703.2 Electric Filters - 741.1 Light/Optics - 746 Imaging Techniques
DOI:10.1016/j.ijleo.2022.169009
Funding details: Number: 2020GY-131,2021GXLH-Z-058, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: 41530422,42020104008,61775176, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the NSFC Major International (Regional) Joint Research Project of China (Grant no. 42020104008 ), the Key Program of National Natural Science Foundation of China (Grant no. 41530422 ), the National Natural Science Foundation of China (NSFC) (Grant no. 61775176 ) and the Shaanxi Province Key Research and Development Program of China (Grant nos. 2021GXLH-Z-058 and 2020GY-131 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 9>
Accession number:20222612274702
Title:A Compact 2D Polarization Splitting Grating Coupler with Lens Tapers
Authors:Xue, Jintao (1); Wang, Binhao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China
Source title:Progress in Electromagnetics Research Symposium
Abbreviated source title:Prog. Electromagn. Res. Symp.
Volume:2022-April
Part number:1 of 1
Issue title:2022 Photonics and Electromagnetics Research Symposium, PIERS 2022 - Proceedings
Issue date:2022
Publication year:2022
Pages:912-915
Language:English
ISSN:15599450
E-ISSN:19317360
ISBN-13:9781665460231
Document type:Conference article (CA)
Conference name:2022 Photonics and Electromagnetics Research Symposium, PIERS 2022
Conference date:April 25, 2022 - April 29, 2022
Conference location:Hangzhou, China
Conference code:180170
Sponsor:College of Information Science and Electronic Engineering; et al.; The Electromagnetics Academy at Zhejiang University; The Zhejiang University/University of Illinois at Urbana-Champaign Institute (The ZJU-UIUC Institute); Zhejiang Key Laboratory for Advanced Microelectronic Intelligent Systems and Applications; Zhejiang University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We present a highly-efficient and ultra-compact polarization splitting grating coupler based on apodized designs of blazed gratings and lens tapers. Within the overall footprint 60 times 60 mu mathrm{m}{2}, the simulated transmission of -2.2 dB at 1308nm and the crosstalk between two polarizations of -16 dB are achieved.<br/></div> © 2022 IEEE.
Number of references:10
Main heading:Polarization
Uncontrolled terms:Blazed grating - Compact polarization - Grating couplers - Polarization splittings
Numerical data indexing:Decibel -1.60E+01dB, Decibel -2.20E+00dB, Size 1.308E-06m
DOI:10.1109/PIERS55526.2022.9792658
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 10>
Accession number:20220911726507
Title:Deep-Learning-Based Rapid Imaging Through Scattering Media beyond the Memory Effect
Authors:Zhou, Meiling (1); Bai, Chen (1); Zhang, Yang (1); Li, Runze (1); Peng, Tong (1); Qian, Jia (1); Dan, Dan (1); Min, Junwei (1); Zhou, Yuan (1); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:34
Issue:5
Issue date:March 1, 2022
Publication year:2022
Pages:295-298
Language:English
ISSN:10411135
E-ISSN:19410174
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">By incorporating the ptychography with the shower-curtain effect (PSE), a large field-of-view object hidden behind the scattering media can be reconstructed from multiple diffused patterns. However, the original PSE method is subjected to low speed data acquisition and time-consuming image reconstruction because of the mechanical scanning scheme and the iterative retrieval algorithm. Here, a deep-learning method based on the PSE with improved optical scheme is proposed to accelerate the data acquisition and image reconstruction speed. By replacing the mechanical translation stage with the digital micromirror device (DMD), it facilitates a large number of data collection for training the network. Single-shot pattern and sub-second reconstruction for the well-trained network model make the method appropriate for rapid imaging. Both qualitative presentation and quantitative analysis for binary resolution target and 2D biological slide specimens demonstrate the effectiveness and feasibility of the proposed method, thereby offering a prospective application in tissue imaging.<br/></div> © 1989-2012 IEEE.
Number of references:24
Main heading:Data acquisition
Controlled terms:Image reconstruction - Iterative methods - Deep learning - Image enhancement
Uncontrolled terms:Aperture - Beyond memory effect - Deep-learning - Images reconstruction - Imaging through scattering medium - Medium - Memory effects - Optical imaging - Rapid - Scattering medium
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 921.6 Numerical Methods
DOI:10.1109/LPT.2022.3153665
Funding details: Number: 2021-08, Acronym: -, Sponsor: -;Number: 61905277,61991452,62005309, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021401, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021JQ-325, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2020GY-008, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 2021-1-2, Acronym: -, Sponsor: Shaanxi Science and Technology Association;
Funding text:This work was supported in part by the National Science Foundation of China (NSFC) under Grant 62005309, Grant 61905277, and Grant 61991452; in part by the Natural Science Foundation of Shaanxi Province under Grant 2021JQ-325; in part by the Research Project of Xi'an Postdoctoral Innovation Base under Grant 2021-08; in part by the Shaanxi Association for Science and Technology under Grant 2021-1-2; in part by the Key Research and Development Program of Shaanxi Province under Grant 2020GY-008; and in part by the Youth Innovation Promotion Association of the Chinese Academy of Sciences under Grant 2021401
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 11>
Accession number:20223612693702
Title:Ultrafast Terahertz Characteristic Spectroscopy Based on Femtosecond Laser and Its Application（Invited）
Title of translation:基 于 飞 秒 激 光 的 超 快 太 赫 兹 特 征 波 谱 技 术 及 其应 用（特 邀）
Authors:Fan, Wenhui (1); Yan, Hui (1); Jiang, Xiaoqiang (1); Chen, Longchao (1); Zheng, Zhuanping (1); Liu, Jia (1); Li, Hui (1); Ding, Ling (1); Song, Chao (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Fan, Wenhui(fanwh@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751403
Language:English
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Terahertz（THz）waves（0.1 THz ~ 10 THz，1 THz = 10<sup>12</sup> Hz）locate in the transitional region of the electromagnetic spectrum，between the classical electronics（radio，microwave and millimeter wave）and the photonics（infrared，visible，ultraviolet and x-ray）. As a kind of coherent measurement technology in THz frequency range，THz characteristic spectroscopy，with high sensitivity，rapidness and nondestructive testing as well as other unique advantages，has shown an attractive promising application prospect in detection，analysis and identification of biochemical molecules and materials. As the widely used broadband THz wave source，THz Photoconductive Antenna（THz-PCA）can emit broadband THz radiation. Therefore，as one of the promising THz emitters and detectors，THz-PCA has the advantages to overcome the defects confronted by other devices （e. g.，low operation frequency，strict working condition and bulk size）and these unique advantages have made THz-PCA become the most commonly utilized THz sources in THz Time-Domain Spectroscopy（THz-TDS）. Although a variety of THz-PCAs are commercially available and become indispensable in many practical applications currently， the insufficient radiation THz power still hinder the further development of THz technologies based on THz-PCA. In order to further promote the research interests of THz-PCA，the working mechanism and some new research progress，technical challenges in the process of practical application and strategies of THz-PCA have to be discussed and analyzed. The underlying physical mechanism of the transient response in THz-PCA emitter and detector are investigated，as well as the influence of several parameters including the power intensity of femtosecond pump laser，the laser pulse duration and the carrier lifetime of the substrate material，are also analyzed based on theoretical models，which provide the technical foundation for designing the efficient THz-PCA. Moreover，a plenty of valuable research schemes have been proposed to develop the THz technologies based on THz-PCA in the past decades，including photoconductive materials and structure design of THz-PCA. To be specific，the sub-picosecond carrier life time of photoconductor can be realized by creating a massive density of defects，dislocations and scattering centers in the substrate material. As for structure design of THz-PCA，the previous researches on THz-PCA was mainly focused on the saturation effect at high pump power and the large aperture dipoles，dipole arrays and interdigitated electrodes structures have been investigated during the early stage. In the recent years，as the quick development of micro-nano fabrication technologies，the THz-PCA incorporated with plasmonic nanostructures and all-dielectric nanostructures have also been widely investigated for improving its performances. In this paper，the working principle and development status of THz-PCAs based on ultrashort pulsed laser are introduced， including theoretical models， substrate materials and different structures of photoconductive antennas. Furthermore， with the dramatic development of source and detector components，THz spectroscopy technology has been utilized in various fields such as chemical detection and substance identification，biomedical application and pharmaceutical industry. THz-TDS is the most commonly used technique in current commercial THz spectroscopy，which has attracted wide attention for its spectral fingerprint，high temporal-spatial resolution，noninvasive and nonionizing properties. Various important biomolecules，such as amino acids，nucleobases and saccharides reveal rich absorption features in THz range. It is verified that THz spectral features originate from the collective molecules of low frequency vibration，rotation and weak interaction with the surrounding molecules（hydrogen bonding，van der Waals force，etc.），so they are very sensitive to the molecular structure and surrounding environment. It is a powerful tool to investigate molecular conformation， positional isomerism of functional groups，intermolecular interactions of organic acids and their salts，optical isomerism，etc. However，it is worth noting that the investigated targets are usually in the form of multi-component mixtures in actual scenario. When the spectral features became more complicated，the much broader THz features would be severely overlapped and accompanied by baseline drift in THz spectra. Identification and quantitative analysis of complex multi-component mixtures will become a great challenge for THz spectral analysis. To overcome such problem，a practical strategy has been proposed by combining machine learning methods with THz-TDS for implementation of practical applications. Moreover，another issue worth noting is conventional free-standing spectroscopy measurement devices are hardly adequate for the detection of microgram level or trace substance. Combination of metamaterials and conventional free-standing THz spectroscopy to enhance the sensing signal is a feasible and effective method，which is crucial for the practicability of clinical adoption. Furthermore，some recent progress we have achieved in THz characteristic spectral technology and its applications are also summarized and discussed.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:191
Main heading:Femtosecond lasers
Controlled terms:Antennas - Carrier lifetime - Defects - Laser pulses - Machine learning - Millimeter waves - Nondestructive examination - Optical pumping - Photoconductivity - Substrates - Terahertz spectroscopy - Terahertz waves - Transient analysis - Well testing
Uncontrolled terms:Characteristic spectroscopy - Emitters and detectors - ITS applications - Machine-learning - Photoconductive antennas - Substance identification - Substrate material - Tera Hertz - THz waves - THz-TDS
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 723.4 Artificial Intelligence - 741.1 Light/Optics - 744.1 Lasers, General - 931.1 Mechanics - 951 Materials Science
Numerical data indexing:Frequency 1.00E+11Hz, Frequency 1.00E+12Hz, Frequency 1.00E+13Hz, Frequency 1.20E+01Hz
DOI:10.3788/gzxb20225107.0751403
Funding details: Number: 61675230, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J08-029,YYYJ-1123-4, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:National Natural Science Foundation of China （No. 61675230），the"Hundred of Talents Programs"of Chinese Academy of Sciences（No. J08-029），the Innovative Project of Chinese Academy of Sciences（No. YYYJ-1123-4）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 12>
Accession number:20214711184110
Title:A large dispersion-managed monolithic all-fiber chirped pulse amplification system for high-energy femtosecond laser generation
Authors:Li, Feng (1); Zhao, Wei (1); Wang, Yishan (1); Wang, Na (1); Li, Qianglong (1); Yang, Yang (1); Wen, Wenlong (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Feng(laser_lifeng@opt.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:147
Issue date:March 2022
Publication year:2022
Article number:107684
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">A high energy monolithic all fiber chirped pulse amplification (CPA) system composed of fiber-silicate glass fiber is demonstrated in this work. In this compact system, the optical stretcher consists of two large dispersion chirped fiber Bragg gratings that offer a high stretch ratio to lower the nonlinearity that accumulates in the fiber amplifier. By employing high gain silicate glass fiber with a length of 20 cm as the main amplifier, an optimal balance of pulse energy and the B-integral is achieved. An amplified power of 42.6 W, corresponding to a pulse energy of 213 µJ, is obtained with an injection power of 100 mW. After compression, the laser pulses are compressed by a novel polarization-controlled double-pass configuration of a chirped volume Bragg grating (CVBG) to match the dispersion of the fiber stretcher. A total compression efficiency of 79.8% is obtained. The dispersion between the stretcher and the compressor is matched with the self-made temperature tuning device of the fiber grating. An optimized pulse width of 781 fs and a pulse energy of 170 µJ are obtained with the single-mode beam profile. To the best of our knowledge, this is the highest energy ever obtained with a single-mode beam profile for a spliced monolithic all-fiber CPA system. This compact high-energy fiber system will be useful in scientific research and industrial applications.<br/></div> © 2021 Elsevier Ltd
Number of references:27
Main heading:Ultrashort pulses
Controlled terms:Stretchers - Glass fibers - Industrial research - Fiber amplifiers - Silicates - Chirp modulation - Fiber Bragg gratings
Uncontrolled terms:All fiber - Chirped-pulse amplification system - Chirped-pulse-amplification - Energy - High-energy fiber femtosecond laser - Large dispersion - Monolithics - Power - Pulse energies - Silicate glass fibers
Classification code:462.1 Biomedical Equipment, General - 716 Telecommunication; Radar, Radio and Television - 744.4 Solid State Lasers - 812.3 Glass - 901.3 Engineering Research - 912.1 Industrial Engineering
Numerical data indexing:Percentage 7.98E+01%, Power 1.00E-01W, Power 4.26E+01W, Size 2.00E-01m, Time 7.81E-13s
DOI:10.1016/j.optlastec.2021.107684
Funding details: Number: 61690222,61805274, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: SAFEA, Sponsor: State Administration of Foreign Experts Affairs;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2018YFB1108000, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key R&D Program of China (No. 2018YFB1108000), the National Natural Science Foundation of China (No. 61690222, No. 61805274), the CAS/SAFEA International Partnership Program for Creative Research Teams, and the Youth Innovation Promotion Association XIOPM-CAS.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 13>
Accession number:20220911739640
Title:Dual-core negative curvature fiber-based terahertz polarization beam splitter with ultra-low loss and wide bandwidth (Open Access)
Title of translation:低损耗大带宽双芯负曲率太赫兹光纤偏振分束器 (Open Access)
Authors:Hui, Zhan-Qiang (1); Gao, Li-Ming (1); Liu, Rui-Hua (1); Han, Dong-Dong (1); Wang, Wei (2)
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Hui, Zhan-Qiang(zhanqianghui@xupt.edu.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:4
Issue date:February 20, 2022
Publication year:2022
Article number:048702
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">A novel terahertz polarization beam splitter (PBS) with low loss and large bandwidth based on double core negative curvature fiber is designed. The device takes copolymers of cycloolefin as the substrate, and 12 circular tubes with embedded tubes are evenly distributed along the circumference. The fiber core is divided into two cores through two groups of circumscribed small clad tubes symmetrical up and down. The finite-difference time-domain (FDTD) method is used to analyze its guide mode properties. The effects of various structural parameters on its beam splitting characteristics are investigated in detail, and the extinction ratio (ER), bandwidth and transmission loss of the PBS are analyzed. The simulation results show that when the incident light frequency is 1THz and the beam splitter length is 6.224 cm, the ER of x-polarized light reaches 120.8 dB, the bandwidth with ER above 20 dB is 0.024 THz, the ER of y-polarized light reaches 63.74 dB, the bandwidth with ER above 20 dB is 0.02THz, and the total transmission loss is as low as 0.037 dB/cm. Tolerance analysis shows that the PBS can still maintain good performance under the ±1% deviation of structural parameters.<br/></div> Copyright © 2022 Acta Physica Sinica. All rights reserved.
Number of references:46
Main heading:Bandwidth
Controlled terms:Fits and tolerances - Light polarization - Wave transmission - Prisms - Finite difference time domain method - Incident light
Uncontrolled terms:Coupled mode theory - Dual-core - Extinction ratios - Low-loss - Negative curvature - Negative curvature fiber - Polarization beamsplitters - Structural parameter - Tera Hertz - Transmission-loss
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics
Numerical data indexing:Decibel 1.208E+02dB, Decibel 2.00E+01dB, Decibel 3.70E-02dB, Decibel 6.374E+01dB, Frequency 1.00E+12Hz, Frequency 2.00E+10Hz, Frequency 2.40E+10Hz, Percentage 1.00E00%, Size 6.224E-02m
DOI:10.7498/aps.71.20211650
Funding details: Number: 20JY060, Acronym: -, Sponsor: -;Number: 61772417,61775180,61875165, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: YJGJ201905, Acronym: XUPT, Sponsor: Xi'an University of Posts and Telecommunications;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 61875165, 61775180, 61772417), the Collaborative Innovation Projects of Education Office of Shaanxi Province, China (Grant No. 20JY060), and the Graduates’ Creative Workstation of Xi’an University of Posts and Telecommunications, China (Grant No. YJGJ201905). † Corresponding author. E-mail: zhanqianghui@xupt.edu.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 14>
Accession number:20225013227116
Title:Preparation of Gd <sup>3+</sup>-Doped LiYF<inf>4</inf>: Yb<sup>3+</sup>/Ho<sup>3+</sup>Micro-Crystal and the Application Research in Anti-Counterfeiting
Title of translation:掺Gd<sup>3+</sup>的LiYF<inf>4</inf>： Yb<sup>3+</sup>/Ho<sup>3+</sup>微米晶体制备以及在防伪中的应用研究
Authors:Wang, Chong (1); Wang, Jing-Hua (1, 2); Li, Dong-Dong (1); She, Jiang-Bo (2)
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi
Volume:42
Issue:11
Issue date:November 2022
Publication year:2022
Pages:3581-3587
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">The purpose of this paper is to study a rare earth doped luminescence material with good up-conversion luminescence performance, which is of great significance in anti-counterfeiting technology. In order to improve the up-conversion luminescence performance of LiYF 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystals, a series of Gd <sup>3+</sup>-doped LiYF 4 : Yb 3+ /Ho 3+ micron crystals were successfully prepared by hydrothermal synthesis method. XRD and Scanning electron microscope (SEM) were used to characterize the samples' phase purity and crystal morphology. Fluorescence spectrum analyzed the upconversion luminescence properties of LiGd x Y 1- x F 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystals under 980nm laser excitation. Firstly, the crystal structure, size, morphology and upconversion luminescence properties of LiGd x Y 1- x F 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystals were investigated. The results show that the XRD diffraction peaks of LiGd x Y 1- x F 4 : Yb 3+ /Ho 3+ micron crystal samples are exactly corresponding to the characteristic peaks of the tetragonal LiYF 4 standard card (PDF#17-0874) without other peaks. The SEM characterization results show that the crystal morphology is octahedral. It shows that LiGd <inf>x</inf>Y<inf>1-x</inf>F<inf>4</inf>: Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystal with pure tetragonal phase was successfully synthesized. Fluorescence spectrum test results showed that the up-conversion luminescence intensity of the samples increased first and then decreased with the increase of Gd <sup>3+</sup>ion doping concentration and reached the maximum when Gd <sup>3+</sup>ion doping concentration was 30 mol%. Secondly, the relationship between the up-conversion luminescence performance and the excitation power of Gd <sup>3+</sup>doping concentration of 30 mol% was further studied, and the excitation power was 0.5~1.5 W. The red and green upconversion luminescence intensity ( R/G ) ratio of LiGd 0.3 Y 0.49 F 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystal only changes about 12% with the increase of excitation power. The upconversion luminescence of LiGd 0.3 Y 0.49 F 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystal does not change obviously with the increase of excitation power, but still emits stable and bright green light. This phenomenon shows that incorporating Gd <sup>3+</sup>ions greatly improves the up-conversion luminescence performance of the samples, and this stable and efficient luminescence performance guarantees its good anti-counterfeiting performance. Finally, LiYF 4 : Yb<sup>3+</sup>/Ho<sup>3+</sup>micron crystal powder with Gd <sup>3+</sup>ion doping concentration of 30 mol% was mixed with screen metal ink in a certain proportion to produce screen anti-counterfeiting ink, and then the anti-counterfeiting logo pattern of "Xi'an" was printed on the glass base by screen printing technology. After drying treatment, under the excitation of 980 nm laser, it emits bright and stable green visible light, and the anti-counterfeiting logo made has the characteristics of high luminous intensity, easy to identify and not easy to fall off, which can be widely used in the field of anti-counterfeiting.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:18
Main heading:Binary alloys
Controlled terms:Crystal structure - Fluorescence - Hydrothermal synthesis - Laser excitation - Luminescence of inorganic solids - Morphology - Phosphors - Rare earths - Scanning electron microscopy - Screen printing - X ray diffraction
Uncontrolled terms:Anti-counterfeiting - Anti-counterfeiting identification - Excitation power - Hydrothermal synthesis method - Ion doping concentrations - Ligd xY1-xF40.79F4: yb0.2/ho0.01 - Micron crystal - Performance - Synthesis method - Upconversion luminescence
Classification code:741.1 Light/Optics - 744.9 Laser Applications - 745.1 Printing - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1.1 Crystal Lattice - 951 Materials Science
Numerical data indexing:Amount of substance 3.00E+01mol, Capacitance 4.90E-01F, Capacitance 7.90E-01F, Percentage 1.20E+01%, Power 5.00E-01W to 1.50E+00W, Size 9.80E-07m
DOI:10.3964/j.issn.1000-0593(2022)11-3581-07
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 15>
Accession number:20220911739561
Title:Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces
Authors:Qin, Chong (1, 2); Fan, Wenhui (1, 2, 3); Wu, Qi (1, 2); Jiang, Xiaoqiang (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Fan, Wenhui(fanwh@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:512
Issue date:June 1, 2022
Publication year:2022
Article number:128061
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Terahertz wave has great potential in wireless communication, biomedical monitoring and spectroscopy. However, the lack of terahertz functional devices hinders the development of terahertz technology. Metasurface is a kind of novel artificial two-dimensional electromagnetic metamaterials, which can efficiently manipulate the electromagnetic wave at sub-wavelength scale and have the advantages of small size and light weight. Therefore, metasurfaces provide an additional modality to realize terahertz functional devices. Terahertz metalens based on metasurfaces is an indispensable functional component, but there is chromatic aberration that will degrade its performance when broadband terahertz wave is incident, so it is very important to eliminate the chromatic aberration of terahertz metalens, especially for terahertz imaging, and so on. In this paper, we elaborate the principle of elimination of chromatic aberration and design a polarization insensitive achromatic metalens working in the frequency range from 0.8 THz to 1.2 THz with numerical aperture of 0.46, three types of meta-atoms with different cross-section shapes are adopted to constitute achromatic metalens. The numerical simulation has also been carried out for the proposed achromatic metalens. The maximum deviation of focal length and average focusing efficiency of the proposed achromatic metalens across the working frequency range is 4.74% and 38.47%, respectively. Meanwhile, the achromatic metalens is polarization insensitive due to the symmetric cross-section shapes of meta-atoms adopted. The polarization insensitive achromatic metalens will pave the way for the practical application of terahertz devices based on metasurfaces.<br/></div> © 2022 Elsevier B.V.
Number of references:40
Main heading:Terahertz waves
Controlled terms:Incident light - Polarization - Terahertz spectroscopy - Aberrations - Metamaterials - Metals
Uncontrolled terms:Achromatic metalens - Chromatic aberration - Cross section shape - Frequency ranges - Functional devices - MetaLens - Metasurface - Polarization-insensitive - Tera Hertz - Wireless communications
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 931.1 Mechanics - 951 Materials Science
Numerical data indexing:Frequency 8.00E+11Hz to 1.20E+12Hz, Percentage 3.847E+01%, Percentage 4.74E+00%
DOI:10.1016/j.optcom.2022.128061
Funding details: Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-437, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was financially supported by the National Natural Science Foundation of China ( 61675230 , 61905276 ); Natural Science Foundation of Shaanxi Province, China ( 2020JQ-437 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 16>
Accession number:20223412623257
Title:Polarization-multiplexing achromatic metasurfaces for manipulation of terahertz waves
Authors:Qin, Chong (1, 2); Fan, Wenhui (1, 2, 3); Wu, Qi (1, 2); Jiang, Xiaoqiang (1, 2); Yan, Hui (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Fan, Wenhui(fanwh@opt.ac.cn)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:39
Issue:9
Issue date:September 2022
Publication year:2022
Pages:2378-2386
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Metasurfaces that can effectively manipulate electromagnetic waves provide a novel solution to realize efficient terahertz functional devices. However, the chromatic aberration of metasurfaces is a remarkable challenge for their extensive applications. Multi-functional metasurfaces are highly desirable in practical applications. Here, we demonstrate polarization-multiplexing achromatic metasurfaces working in the terahertz regime based on anisotropic meta-atoms which exhibit the formbirefringence. Specifically, a polarization-multiplexing achromatic metalens working in the frequency range from 0.8 THz to 1.2 THz is proposed and verified numerically, which can focus terahertz waves within the working bandwidth to different focal planes by varying the polarization state of an incident terahertz wave; the deviation of focal length is less than 8.88% across the whole working bandwidth. In addition, a polarization-multiplexing achromatic deflector working in the frequency range from 0.8 THz to 1.2 THz is also designed and simulated, which can deflect a terahertz wave within the working bandwidth to different directions by manipulating the polarization state of an incident terahertz wave. The metasurfaces demonstrated here are of great significance for the development of ultra-compact, flexible, and multi-functional terahertz devices based on metasurfaces.<br/></div> © 2022 Optica Publishing Group.
Number of references:61
Main heading:Bandwidth
Controlled terms:Aberrations - Polarization - Terahertz waves
Uncontrolled terms:Chromatic aberration - Frequency ranges - Functional devices - MetaLens - Metasurface - Multi-functional - Novel solutions - Polarization multiplexing - Polarization state - Tera Hertz
Classification code:711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing
DOI:10.1364/JOSAB.462959
Funding details: Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-437, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (61675230, 61905276); Natural Science Foundation of Shaanxi Province (2020JQ-437).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 17>
Accession number:20220711619779
Title:Spirally rotating particles with structured beams generated by phase-shifted zone plates
Authors:Rafighdoost, Jila (1); Li, Xing (1, 2); Zhou, Yuan (1, 2); Zhou, Meiling (1); Li, Manman (1); Yan, Shaohui (1); Yao, Baoli (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:5
Issue date:February 10, 2022
Publication year:2022
Pages:1268-1274
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The emerging field of structured beams has led to optical manipulation with tremendous progress. Beyond various methods for structured beams, we use phase-shifted zone plates known as beam-shaping diffractive optical elements to generate beams whose phase exclusively or both phase and intensity are twisted along a curve. These beams can trap and guide particles on open curved trajectories for continuous motion, not necessarily requiring a closed symmetric intensity distribution. We show the feasibility and versatility of the proposed method as a promising technique in optical manipulation in which the trajectory of the spiral rotation and the rate of rotation of trapped particles can be controlled.<br/></div> ©2022 Optica Publishing Group
Number of references:48
Uncontrolled terms:Beam-shaping - Continous motion - Intensity distribution - Optical manipulation - Phase shifted - Symmetrics - Trapped particle - Use Phase - Zone plates
Classification code:408.2 Structural Members and Shapes
DOI:10.1364/AO.449324
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 18>
Accession number:20220311461529
Title:Efficient mid-infrared wavelength converter based on plasmon-enhanced nonlinear response in graphene nanoribbons
Authors:Chi, Jiao (1, 3); Liu, Hongjun (1, 2); Wang, Zhaolu (1); Huang, Nan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (3) School of Energy Engineering, Yulin University, Yulin; 719000, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Journal of Physics D: Applied Physics
Abbreviated source title:J Phys D
Volume:55
Issue:11
Issue date:March 17, 2022
Publication year:2022
Article number:115101
Language:English
ISSN:00223727
E-ISSN:13616463
CODEN:JPAPBE
Document type:Journal article (JA)
Publisher:IOP Publishing Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Graphene plasmons with enhanced localized electric field have been used for boosting the light-matter interaction in linear optical nano-devices. Meanwhile, graphene is an excellent nonlinear material for several third-order nonlinear processes. We present a theoretical investigation of the mechanism of plasmon-enhanced third-order nonlinearity susceptibility of graphene nanoribbons. It is demonstrated that the third-order nonlinearity susceptibility of graphene nanoribbons with excited graphene surface plasmon polaritons can be an order of magnitude larger than the intrinsic susceptibility of a continuous graphene sheet. Combining these properties with the relaxed phase matching condition due to the ultrathin graphene, we propose a novel plasmon-enhanced mid-infrared (MIR) wavelength converter with arrays of graphene nanoribbons. The wavelength of signal light is in the MIR range, which can excite the tunable surface plasmons polaritons in arrays of graphene nanoribbons. The efficiency of the converter from MIR to near-infrared wavelength can be remarkably improved by 60 times compared with a graphene sheet without graphene plasmons. This work provides a novel idea for the efficient application of graphene in nonlinear optical nano-devices. The proposed MIR wavelength converter is compact, tunable and has promising potential in graphene-based MIR detectors with high detection efficiency.<br/></div> © 2021 IOP Publishing Ltd.
Number of references:50
Main heading:Graphene
Controlled terms:Surface plasmon resonance - Electric fields - Four wave mixing - Infrared devices - Nanoribbons - Phonons - Electromagnetic wave polarization - Photons - Efficiency - Phase matching
Uncontrolled terms:Four-wave-mixing - Graphene nanoribbons - Graphene plasmons - Graphene sheets - Mid-infrared wavelengths - Nano-devices - Plasmon-enhanced - Third-order nonlinearity - Third-order nonlinearity susceptibility - Wavelength converter
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 713 Electronic Circuits - 761 Nanotechnology - 804 Chemical Products Generally - 913.1 Production Engineering - 931.3 Atomic and Molecular Physics
DOI:10.1088/1361-6463/ac3e92
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 19>
Accession number:20222412231013
Title:Highly sensitive metal ion sensing by graphene oxide functionalized micro-tapered long-period fiber grating
Authors:Wang, Ruiduo (1); Kang, Xin (2); Kong, Depeng (1); Jiang, Man (2); Ren, Zhaoyu (2); Hu, Baowen (1); He, Zhengquan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) Institute of Photonics & Photon-Technology, Northwest University, Xi'an; 710069, China
Corresponding authors:Kong, Depeng(kongdp@opt.ac.cn); Jiang, Man(jmnwu@nwu.edu.cn)
Source title:Analyst
Abbreviated source title:Analyst
Volume:147
Issue:13
Issue date:April 29, 2022
Publication year:2022
Pages:3025-3034
Language:English
ISSN:00032654
E-ISSN:13645528
CODEN:ANALAO
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">An accurate as well as highly sensitive label-free chemical sensing platform for the detection of various metal ions was demonstrated. The chemical sensor was derived from the micro-tapered long-period fiber grating (MLPG) by depositing graphene oxide (GO) by chemical-bonding and optical-tweezer effects. The enhancement in refractive index (RI) sensitivity as well as reusability was obtained by evaluating the deposition thickness in the range of approximately 97.7 to 158.9 nm. Based on the analysis of adsorption principles, the enhanced RI sensitivity leads to a limit of detection as low as 3.2 ppb. The highest sensitivities for the cases studied using sodium and manganese ions in a wide concentration range of 1 ppb to 1 × 10<sup>6</sup> ppb are respectively 2.2 × 10<sup>−3</sup> dB per ppb and 3.2 × 10<sup>−3</sup> dB per ppb. Mixture samples were also studied to evaluate the properties of sensing the doped ions. This demonstration of GO modified MLPG is bound to find potential applications that require sensing of mixed samples and illustrates significant importance in developing cost-effective, label-free, reusable, and real-time chemical sensors.<br/></div> © 2022 The Royal Society of Chemistry
Number of references:42
Main heading:Diffraction gratings
Controlled terms:Chemical bonds - Chemical detection - Chemical sensors - Cost effectiveness - Graphene - Metal ions - Metals - Refractive index - Reusability - Self assembly
Uncontrolled terms:Chemical bondings - Chemical sensing - Deposition thickness - Functionalized - Label free - Limit of detection - Long-period fibre gratings - Metal ion sensing - Refractive index sensitivity - Sensing platforms
Classification code:531.1 Metallurgy - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 801 Chemistry - 801.4 Physical Chemistry - 804 Chemical Products Generally - 911.2 Industrial Economics - 951 Materials Science
Numerical data indexing:Decibel 2.20E-03dB, Decibel 3.20E-03dB, Size 9.77E-08m to 1.589E-07m
DOI:10.1039/d1an02263f
Funding details: Number: 2018JM1059, Acronym: -, Sponsor: -;Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors acknowledge funding from the National Natural Foundation of China (NSFC) (61535015) and the Science and Technology Innovation and Entrepreneurship double tutor project of Shaanxi province (2018JM1059).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 20>
Accession number:20222812350534
Title:Scattered Image Reconstruction at Near-Infrared Based on Spatial Modulation Instability (Open Access)
Authors:Liao, Yuan (1, 2); Li, Lin (1, 2); Wang, Zhaolu (1); Huang, Nan (1); Liu, Hongjun (1, 3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, School of Optoelectronics, Beijing; 100084, China; (3) Shanxi University, Collaborative Innovation Center of Extreme Optics, Taiyuan; 030006, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:34
Issue:14
Issue date:July 15, 2022
Publication year:2022
Pages:741-744
Language:English
ISSN:10411135
E-ISSN:19410174
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method of near-infrared image reconstruction based on spatial modulation instability in a photorefractive strontium barium niobate crystal. The conditions that lead to the formation of modulation instability at near-infrared are discussed depending on the theory of modulation instability gain. Experimental results of scattered image reconstruction at the 1064 nm wavelength show the maximum cross-correlation coefficient and cross-correlation gain are 0.57 and 2.09 respectively. This method is expected to be an aid for near-infrared imaging technologies.<br/></div> © 1989-2012 IEEE.
Number of references:35
Main heading:Image reconstruction
Controlled terms:Electric fields - Infrared devices - Light polarization - Modulation - Niobium compounds - Optical signal processing - Photoreactivity - Stability - Thermography (imaging)
Uncontrolled terms:Images reconstruction - Modulation instabilities - Near Infrared - Near- infrared images - Near-infrared - Near-infrared imaging - Optical scattering - Photorefractive effects - Spatial modulations
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics - 742.1 Photography
Numerical data indexing:Size 1.064E-06m
DOI:10.1109/LPT.2022.3185171
Funding details: Number: 61775234,61975232, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grant 61775234 and Grant 61975232.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 21>
Accession number:20215211398083
Title:Quantitative Phase Retrieval Through Scattering Medium via Compressive Sensing (Open Access)
Authors:Peng, Tong (1); Li, Runze (1); Min, Junwei (1); Dan, Dan (1); Zhou, Meiling (1); Yu, Xianghua (1); Zhang, Chunmin (2); Bai, Chen (1); Yao, Baoli (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Science, Xi'an Jiaotong University, Xi'an; 710049, China; (3) National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266200, China
Corresponding authors:Bai, Chen(baichen@opt.ac.cn); Yao, Baoli(yaobl@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:1
Issue date:February 1, 2022
Publication year:2022
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Scattering media, such as biological tissues and turbid liquids, scatter light randomly and introduce several challenges when imaging objects behind them. The transmission matrix (TM) describes the relation between the input and output of a beam transmitted through a medium, which can be used to reconstruct a target located behind a scattering medium. However, the current TM methods cannot easily retrieve the phase distribution of objects inside or behind a scattering medium. In this work, a compressive sensing (CS) method to identify the TM of a scatter contained in an imaging system was investigated. By calibrating the TM, the phase information of the object can be retrieved quantitatively. This method allows one to retrieve multilevel and dynamic phase objects behind different scatters. The influence of the calibration parameters on the reconstruction quality was investigated in detail. The proposed method, featuring noninterference measurements of the TM and exploiting a large field of view, can be used in phase imaging applications.<br/></div> © 2009-2012 IEEE.
Number of references:35
Main heading:Compressed sensing
Uncontrolled terms:Biological tissues - Compressive sensing - Imaging objects - Imaging through scattering medium - Input and outputs - Measurement by laser beam - Phase retrieval - Scattering medium - Transmission matrix - Turbid liquids
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/JPHOT.2021.3136509
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 22>
Accession number:20220611601242
Title:In-Plane Anisotropic Plasmons in Van Der Waals Thin Films of WTe<inf>2</inf> (Open Access)
Authors:Li, Shaopeng (1); Sun, Qibing (2)
Author affiliation:(1) Shaanxi University of Science and Technology, Department of Physics, Xi'an; 710021, China; (2) Chinese Academy of Science, State Key Laboratory of Transient Optics and Photonics Technology, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding authors:Li, Shaopeng(lishaopeng@sust.edu.cn); Sun, Qibing(qbsun@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:1
Issue date:February 1, 2022
Publication year:2022
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Anisotropic plasmonic surface supports elliptic, hyperbolic and even flattened polaritons, which is quite interesting for the diffractionless and highly collimated propagation of infrared light at the nanoscale. However, direct real-space near-field observation of anisotropic plasmons as well as frequency dependent topological transitions in natural materials have not been realized. In this paper, we theoretically investigate real-space anisotropic plasmons in WTe<inf>2</inf> thin films by using a phenomenological cavity model, anisotropic near-field plasmonic images with specific interference patterns and isofrequency curves in momentum space have been demonstrated. Due to the frequency selective forbidden of plasmons along b axis, a topological transition from the elliptic to the hyperbolic regime is manifested. Moreover, the plasmons as well as topological transition present significant electrostatic-gating tunability. Our studies provide new insights into WTe<inf>2</inf> based plasmonic components for the manipulation of plasmon propagation, which capable of tailoring anisotropic two-dimensional light confinement in the far-infrared regime and can be applied to investigate other anisotropic materials.<br/></div> © 2009-2012 IEEE
Number of references:40
Main heading:Polariton
Controlled terms:Topology - Photons - Thin films - Anisotropy - Plasmonics - Tellurium compounds - Van der Waals forces - Phonons
Uncontrolled terms:Conductivity - Near fields - Optical imaging - Optical reflection - Plasmonics - Polaritons - Real-space - Thin-films - Topological transitions - Van der Waal
Classification code:801.4 Physical Chemistry - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics
DOI:10.1109/JPHOT.2022.3146208
Funding details: Number: 10.13039/501100001809, Acronym: -, Sponsor: National Natural Science Foundation of China;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 23>
Accession number:20221211830543
Title:Dynamics of Bubble Pairs in Water Induced by Focused Nanosecond Laser Pulse
Title of translation:纳秒脉冲激光诱导的水中双空泡振荡研究
Authors:Fu, Lei (1, 2); Wang, Ping (1, 2); Wang, Sijia (1); Xin, Jing (1); Zhang, Luwei (1); Zhang, Zhenxi (1); Wang, Jing (1); Yao, Cuiping (1)
Author affiliation:(1) Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yao, Cuiping(zsycp@mail.xjtu.edu.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:4
Issue date:February 25, 2022
Publication year:2022
Article number:0407001
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective: Focused laser-induced cavitation in liquid is crucial in numerous applications, e.g., targeted cell lysis, microfluidic operations (such as switching, pumping, and mixing), and perforation of cell membranes. Depending on the focusing conditions and laser pulse energy, single or multiple bubble formations may occur, which may be accompanied by bubble coalescence, high-speed jet formation, ring vortex generation, and multiple shock wave emission. Owing to its promising application prospect on microsurgery, micropumping, and tissue cutting, laser-induced multiple bubbles and their interactions have been studied extensively. It has been confirmed that the dynamics of multiple bubbles are strongly related to the relative bubble positions as well as the time and size difference between bubbles. For example, by adjusting these parameters, the strength and direction of the emerging liquid jets can be controlled. Shock wave and rebound bubbles generated after cavitation bubble collapse are susceptible to their asymmetrical collapse. Without a doubt, the mutual interaction of bubbles causes the asymmetrical oscillation process of bubbles. However, to the best of our knowledge, the influence of multiple bubble interactions on shock wave emission and rebound bubble process has not been studied yet. Therefore, in this study, two bubbles with similar sizes were generated using a single nanosecond laser pulse to investigate the influence of relative interval on multiple bubble dynamics, especially on collapse shock wave emission and rebound bubble generation. Methods: A frequency-doubled Q-switched Nd:YAG laser was introduced to generate optical breakdown in water. The laser pulse was split into two parts using a variable beam splitter. Then, the split laser pulses were focused on water from different directions to generate bubble pairs. Three methods were introduced to measure the bubble pair dynamics: high-speed shadowgraph, optical scattering technique, and acoustic detection technique. It was easy to generate bubble pairs with variable relative interval by adjusting the incidence direction of laser pulses, focusing objective position, and pulse energy. First, the bubble pair dynamics with different relative intervals were discussed experimentally and compared with the Rayleigh-Plesset model. Second, the influences of the relative interval between bubble pairs on the collapse shock wave strength and rebound bubble oscillation period were investigated. In this part, a high-speed camera was replaced by an EMCCD to picture the plasmas generated during an optical breakdown, and the bubble size was calculated by its first oscillation period. Results and Discussions: For a single bubble in free liquid, the maximum radius of the bubble linearly increases with the cube root of the pulse energy and its first oscillation period, respectively, (Fig. 3), which means that the bubble size can be calculated from the pulse energy or its first oscillation period. The oscillation process of bubble pairs is significantly influenced by its relative interval (γ) (Fig. 4). For γ=1.36, the bubble pairs oscillates spherically, without contacting each other before their first collapse, but both of their first oscillation periods significantly increases [Figs. 4(a) and (b)]. For γ≈0.49, the two bubbles begin to coalesce during the early stage of expansion, and their shapes deform. The evolution of the equivalent radius of the coalesced bubble fits well with the Rayleigh-Plesset simulation [Figs. 4(c) and (d)]. For γ≈0.18, the coalesced bubble oscillates spherically again during its first period [Figs. 4(e) and (f)], which is similar to the single bubble case. Then, we experimentally examine the influence of relative interval of bubble pairs on the collapse shock wave emission and rebound bubble generation. The results revealed that the first oscillation period was uninfluenced by the relative interval (γ<0.75) (Table 1). However, with the increase in relative interval, the collapse shock wave strength first reduced, then increased, and then reduced again; however, an opposite trend was observed in the rebound bubble oscillation period (Fig. 6), which meant that the relative interval affected the energy distribution between shock wave and rebound bubble. Owing to the multiple shock wave formation induced by the asymmetric collapse of the coalesced bubble, the evolution of shock wave strength and rebound bubble oscillation over relative interval were not synchronous. Conclusions: In this study, we investigate the dynamics of laser-induced bubble pairs with variable relative interval. The bubble pair oscillation process significantly varies with relative interval. For a noncoalesced bubble pair, the oscillation is nearly spherically during the first period, but both of their oscillation processes are prolonged. For a coalesced bubble pair, the smaller the relative interval, the more spherical the bubble shape during its first period. The first oscillation period is longer than that of every single bubble and unaffected by the relative interval when it is less than 0.75. Besides, the evolution of coalesced bubble could still be described by Rayleigh-Plesset model. However, the relative interval of bubble pairs significantly influences the collapse shock wave emission and rebound bubble generation after the collapse of the coalesced bubble. The findings of this study are expected to facilitate the applications of laser-induced bubbles in microfluidic operations, such as rapid mixing and cell sorting.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:48
Main heading:Pulsed lasers
Controlled terms:High speed cameras - Optical pumping - Yttrium aluminum garnet - Neodymium lasers - Shock waves - Cavitation - Cytology - Laser pulses - Bubbles (in fluids) - Oscillating flow
Uncontrolled terms:Bubble generation - Bubble oscillation - Bubble pair dynamic - Laser-induced cavitation - Oscillation periods - Pulse energies - Shock wave emission - Shock-waves - Single-bubbles - Wave strengths
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 631.1.2 Gas Dynamics - 742.2 Photographic Equipment - 744.1 Lasers, General - 744.4 Solid State Lasers - 804.2 Inorganic Compounds - 931 Classical Physics; Quantum Theory; Relativity
DOI:10.3788/CJL202249.0407001
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 24>
Accession number:20221912098412
Title:Rotating of metallic microparticles with an optimal radially polarized perfect optical vortex
Authors:Zhou, Yuan (1, 2); Zhang, Yanan (1, 2); Gao, Wenyu (1, 2); Yan, Shaohui (1); Li, Manman (1); Li, Xing (1, 2); Wang, Ping (1, 3); Yao, Baoli (1, 2, 4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Biomedical Information Engineering, Ministry of Education, Institute of Biomedical Photonics and Sensing, School of Life Science and Technology, Xi'An Jiaotong University, Xi'an; 710049, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:24
Issue:6
Issue date:June 2022
Publication year:2022
Article number:064003
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">We report an optical rotating of metallic microparticles using an optimal radially polarized perfect optical vortex (RPPOV). Due to its polarization structure, the RPPOV's transverse intensity exhibits two rings separated by roughly a wavelength. We show both numerically and experimentally that a metallic microparticle immersed in such a double-ring vortex develops two radial equilibrium positions, at either of which the particle can experience a non-zero azimuthal force, thus leading to a simultaneous rotation of the metallic microparticles about the optical axis at two orbits with different radius. Furthermore, the rotation radius and velocity can be separately controlled by changing the parameters of the RPPOV.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:39
Main heading:Optical tweezers
Controlled terms:Metals - Vortex flow
Uncontrolled terms:Double ring - Equilibrium positions - Metallic microparticle - Metallics - Micro particles - Optical vortices - Optical- - Polarization structures - Radially polarized - Ring vortex
Classification code:631.1 Fluid Flow, General - 744.9 Laser Applications
DOI:10.1088/2040-8986/ac675d
Funding details: Number: 11904395,11974417,62135005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by the National Natural Science Foundation of China under Grant Nos. 11974417, 11904395 and 62135005.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 25>
Accession number:20223812744267
Title:Development status, trend and key technologies of air-based laser communication
Title of translation:空基激光通信研究进展和趋势以及关键技术
Authors:Zheng, Yunqiang (1, 2); Liu, Huan (1, 2); Meng, Jiacheng (1, 2); Wang, Yufei (1, 2); Nie, Wenchao (1, 2); Wu, Junxia (1, 2); Yu, Tingting (1, 2); Wei, Sentao (1, 2); Yuan, Zhanchao (1, 2); Wang, Wei (1, 2); Xie, Xiaoping (1, 2)
Author affiliation:(1) Laboratory of Photonics and Network, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Liu, Huan
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:6
Issue date:June 2022
Publication year:2022
Article number:20210475
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Laser communication, with its wide bandwidth, good confidentiality and no electromagnetic spectrum constraints, has become an effective means to construct high-speed communication in the air, space, earth and sea integrated communication networks. Compared with space-based, the air-based laser communication system, which is carried on balloon, airship, unmanned aerial vehicle aircraft and other platforms, has become the first choice for high security military network, disaster relief emergency network and commercial low-cost network due to its good flexibility, low cost and good maintainability. The latest research progress and main parameters of air-based laser communication system in USA, Germany, France and China are introduced in detail. The trend of one-to-many, lighter weight, wider bandwidth and the challenges of complex atmospheric channel and serious background noise are summarized, and key technical method, such as high dynamic capturing and tracking, high density integration and high sensitivity reception are proposed, which can provide references for air-based laser communication research.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:52
Main heading:Vehicle to vehicle communications
Controlled terms:Antennas - Bandwidth - Commercial vehicles - Costs - Earth (planet) - Military vehicles - Optical communication - Optical links - Space platforms
Uncontrolled terms:Air-based laser communication - Airborne laser communication - Atmospheric laser communications - Development status - Electromagnetic spectra - Free Space Optical communication - Key technologies - Laser communication system - Low-costs - Wide bandwidth
Classification code:404.1 Military Engineering - 655.1 Spacecraft, General - 662.1 Automobiles - 663.1 Heavy Duty Motor Vehicles - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 717.1 Optical Communication Systems - 911 Cost and Value Engineering; Industrial Economics
DOI:10.3788/IRLA20210475
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 26>
Accession number:20221611967933
Title:Photon counting three-dimensional imaging with a position sensitive micro-channel plate detector
Authors:Liu, Yifan (1, 2); Sheng, Lizhi (1); Liu, Yongan (1); Zhao, Baosheng (1)
Author affiliation:(1) State Key Laboratory of Transients Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Liu, Yifan; Sheng, Lizhi
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:1216948
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a photon counting three-dimensional radar system based on a micro-channel plate (MCP) detector with a position-sensitive anode. The system is mainly composed of a laser device, a photon counting imaging detector and readout electronics. The probe laser is divided into two channels. One is used to trigger the start signal, and another irradiates the sample. The reflected light enters into the MCP, and it generates the trigger stop signal. The flight time of the laser pulse is obtained through a constant fraction discriminator(CFD) and a time-to-digital converter (TDC). The time resolution can reach the nanosecond level. The distance information of targets at different distances was measured using this system. The results show that the depth resolution of the system is centimeter level. The performance of the system is demonstrated by imaging of a resolution target and a space object.<br/></div> © 2022 SPIE
Number of references:16
Main heading:Imaging systems
Controlled terms:Image storage tubes - Frequency converters - Photons
Uncontrolled terms:Channel-plate detectors - Imaging detector - Laser device - Micro channel plate - Photon counting - Photon-counting imaging - Position sensitive - Position-sensitive anodes - Three dimensional imaging - Three-dimensional radar systems
Classification code:714.1 Electron Tubes - 746 Imaging Techniques - 931.3 Atomic and Molecular Physics
DOI:10.1117/12.2624010
Funding details: Number: 2017C01064,2018C01008,2018C03052, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2016YFB0800201,2017YFB0803205, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2016XZZX001-04, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2018FD0ZX01, Acronym: -, Sponsor: Major Scientific Project of Zhejiang Laboratory;
Funding text:This work is supported by the National Key Research and Development Program of China (2016YFB0800201, 2017YFB0803205), the Key Research and Development Program of Zhejiang Province (2017C01064, 2018C01008, 2018C03052), Major Scientific Project of Zhejiang Lab (No. 2018FD0ZX01), the Fundamental Research Funds for the Central Universities (2016XZZX001-04), and gifts from Rui-jie Networks. Dong Zhang is the corresponding author. The authors would like to acknowledge anonymous reviewers for their useful comments and shepherds, Xiaoyan Hong, Yongfeng Sun, and Zhiyuan Len for valuable comments in improving this paper. Dong Zhang was supported by the China Scholarship Council.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 27>
Accession number:20224513074944
Title:Quadriwave Lateral Shearing Interferometry Quantitative Phase Imaging Based on 2D Ronchi Phase Grating
Title of translation:基于二维朗奇相位光栅的四波横向剪切干涉定量相位成像
Authors:Song, Jinwei (1, 2); Min, Junwei (1); Yuan, Xun (1, 2); Xue, Yuge (1, 2); Yao, Baoli (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1118001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Quantitative Phase Imaging （QPI） is a technique that can measure the phase map of the light field. It has the characteristics of label-free， non-invasive and three-dimensional observation and has been widely used in bioimaging and industrial inspection. A number of techniques have been developed to measure phase information of objects， including the interferometric method such as Digital Holographic Microscopy （DHM）， and the non-interferometric method such as the Fourier Ptychography Microscopy （FPM）， Transport of Intensity Equation （TIE） method and so on. The interferometric method has high measurement accuracy but a complex experimental setup sensitive to the environmental disturbance. The non-interferometric method recovers phase from the intensity patterns of objects， but requires iterative calculation or multiple images recorded at different positions， which makes the imaging speed slow and unsuitable for real-time observation. The quantitative phase imaging based on Quadriwave Lateral Shearing Interferometry （QLSI） has the advantages of the referenceless beam， simple configuration， high stability and fast imaging speed. In the existing studies， Cross Grating （CG）， Modified Hartmann Mask （MHM）， Randomly Encoded Hybrid Grating （REHG） and other splitter elements were used for QLSI. The cross grating has low diffraction efficiency and energy utilization rate （~10%） for the four beams of first-order diffraction. The MHM and REHG can concentrate the diffracted light energy on the four first-order diffraction beams. But the MHM still has a low energy utilization rate （~37%）， and the REHG has a complex structure for fabrication. This paper proposes a quantitative phase imaging method based on QLSI using a two-dimensional （2D） Ronchi phase grating. The light incident to the 2D Ronchi phase grating is diffracted mainly with energy concentrated on the four first-order diffraction beams， occupying 65.7% of the total incident energy. The object light carrying the sample's phase information is imprinted to the 2D Ronchi phase grating and then copied into four beams， which interfere with each other to produce the quadriwave lateral shearing interferogram. The quantitative phase image of the sample is reconstructed by Fourier analysis of the interferogram. The influence of the grating period on the QLSI imaging is analyzed theoretically， and the optimal grating period is determined to be six times of the pixel size of the detector. This match can make the best use of the spatial bandwidth product of detector and achieve high resolution image. The influence of the illumination wavelength on the phase reconstruction is theoretically analyzed， which shows that the proposed method is insensitive to the illumination wavelength. The feasibility of quantitative phase imaging under wide spectral light illumination source is demonstrated. The compact QLSI module is constructed with the pixel size of 9 μm×9 μm of the detector and the period of 54 μm of the 2D Ronchi grating. The grating period is precisely six times of the pixel size， meeting the requirement of the optimal condition. The QLSI module is directly connected to a conventional optical microscope to implement the QPI imaging of e.g.， Polymethyl Methacrylate （PMMA） microspheres， microlens arrays and staphylococcus section. The relative error of phase experimentally measured is about 1.8%， proving that the method has a high precision of phase measurement. The experimental results also show that the method can be used for quantitative phase imaging with a wide-spectrum light source， making it easily combined with conventional optical microscopes to have a great application potential in biomedicine， three-dimensional topography measurement and other related fields.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:16
Main heading:Phase measurement
Controlled terms:Bioimaging - Diffraction - Diffraction gratings - Energy utilization - Fourier analysis - Fourier transforms - Holography - Incident light - Interferometry - Iterative methods - Microscopic examination - Shearing
Uncontrolled terms:First order - Grating periods - Imaging speed - Interferometric methods - Lateral shearing interferometry - Phase information - Phase-grating - Pixel size - Quadriwave lateral shearing interferometry - Quantitative phase imaging
Classification code:525.3 Energy Utilization - 604.1 Metal Cutting - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 743 Holography - 746 Imaging Techniques - 921 Mathematics - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 941.4 Optical Variables Measurements - 942.2 Electric Variables Measurements
Numerical data indexing:Percentage 1.00E+01%, Percentage 1.80E+00%, Percentage 3.70E+01%, Percentage 6.57E+01%, Size 5.40E-05m, Size 9.00E-06m
DOI:10.3788/gzxb20225111.1118001
Funding details: Number: 61975233, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019393, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2018YFE0128300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Natural Science Foundation of China （No. 61975233）， Youth Innovation Promotion Association， CAS （No. 2019393）， National Key Research and Development Program of China （No.2018YFE0128300）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 28>
Accession number:20221311864800
Title:Simultaneous generation of a broadband MIR and NIR frequency comb in a GaP microring
Authors:Wang, Yi (1, 2); Shi, Lei (1, 2); Wu, Wei (1, 2); Ming, Xianshun (1); Sun, Qibing (1); Wang, Leiran (1, 2); Zhao, Wei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Leiran(lionking@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:10
Issue date:April 1, 2022
Publication year:2022
Pages:2629-2633
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Midinfrared (MIR) optical frequency combs are of great significance as broadband coherent light sources used in extensive areas such as coherent communications and molecule detections. Conventional MIR combs are usually restricted in size and power, while most microcombs are focused in the near-infrared (NIR) region because of the limited accessible Q-factor of microrings and the poor performances of available pumps. In this paper, we numerically demonstrate the simultaneous generation of a broadband MIR and NIR comb in a GaP microring with an additive waveguide. The achieved octave-spanning (1890-4050 nm)MIRmicrocomb at a lowpump power of 34 mW can be effectively converted to the second-harmonic NIR comb covering 1120-1520 nm with separate dispersion optimization of the ring cavity and straight waveguide. The proposed system has the advantage of simple structure and lowpower threshold, which could find potential in highly integrated MIRoptical sources and related applications.<br/></div> © 2022 Optica Publishing Group.
Number of references:37
Main heading:Light sources
Controlled terms:Waveguides - Infrared devices - Q factor measurement - III-V semiconductors
Uncontrolled terms:Coherent light sources - Frequency combs - Infrared frequencies - Microrings - Midinfrared - Near Infrared - Near-infrared - Optical frequency combs - Optical-frequency combs - Power
Classification code:712.1 Semiconducting Materials - 714.3 Waveguides - 942.2 Electric Variables Measurements
Numerical data indexing:Power 3.40E-02W, Size 1.12E-06m to 1.52E-06m, Size 1.89E-06m to 4.05E-06m
DOI:10.1364/AO.454007
Funding details: Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019YFA0308200, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2022JC-43, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. National Key Research and Development Program of China (2019YFA0308200); National Natural Science Foundation of China (61635013); Natural Science Basic Research Program of Shaanxi Province (2022JC-43).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 29>
Accession number:20220211453141
Title:Light-controlled pulsed x-ray tube with photocathode
Authors:Xuan, Hao (1, 2); Liu, Yong-An (1); Qiang, Peng-Fei (1); Su, Tong (1); Yang, Xiang-Hui (1); Sheng, Li-Zhi (1); Zhao, Bao-Sheng (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Instituteof Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sheng, Li-Zhi(lizhi_sheng@opt.ac.cn)
Source title:Chinese Physics B
Abbreviated source title:Chin. Phys.
Volume:30
Issue:11
Issue date:January 2022
Publication year:2022
Article number:118502
Language:English
ISSN:16741056
E-ISSN:20583834
Document type:Journal article (JA)
Publisher:IOP Publishing Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Unstable mechanical structure, low energy efficiency, and cooling requirements limit the application of conventional x-ray tubes based on filament as cathode in several academic areas. In this paper, we demonstrate a light-controlled pulsed x-ray tube using multialkali cathode as electron generator. The photocathode active area of the light controlled x-ray tube is 13.2 cm2 (41 mm in diameter), which provides high photoelectron-emitting efficiency up to 0.288 mA/lm in 460-nm LED and 2.37-mA maximum tube current. Furthermore, the modulation ability from 1 kHz to 100 kHz of the x-ray tube is tested. The results suggest that the light-controlled pulsed x-ray tube has easy modulation and short x-ray pulse properties and is promising to be the next generation x-ray tube with wide applications in medical radiationtherapy as well as the calibration for detectors and scintillators.<br/></div> © 2021 Chinese Physical Society and IOP Publishing Ltd.
Number of references:22
Main heading:Photocathodes
Controlled terms:X ray detectors - Modulation - Tubes (components) - X ray tubes - Energy efficiency - Field emission cathodes
Uncontrolled terms:Active area - Cooling requirements - Efficiency requirements - Emitting efficiency - Lower energies - Mechanical structures - Photocathode - Pulsed X-rays - X-ray modulation - X-ray sources
Classification code:525.2 Energy Conservation - 619.1 Pipe, Piping and Pipelines - 714.1 Electron Tubes - 741.3 Optical Devices and Systems
Numerical data indexing:Area 1.32E-03m2, Electric current 2.88E-04A, Frequency 1.00E+03Hz to 1.00E+05Hz, Size 4.10E-02m, Size 4.60E-07m
DOI:10.1088/1674-1056/abff1e
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 30>
Accession number:20222312205130
Title:The influence of different antimony content in Ga-As-Sb-S chalcogenide glass system: Modification of physical & spectroscopic properties and fiber forming ability
Authors:Cui, Jian (1, 2, 4); Zhang, Hao (1, 2); Liu, Lutao (1, 2); Xu, Yantao (2); Xiao, Xusheng (2); Li, Man (4); Ma, Wenchao (4); Guo, Haitao (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Shanxi, Taiyuan; 030006, China; (4) Science and Technology on Electro-Optical Information Security Control Laboratory, Tianjin; 300308, China
Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:48
Issue:18
Issue date:September 15, 2022
Publication year:2022
Pages:25756-25763
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the fiber drawing performances including the anti-crystallization in fiber drawing process and the mechanical properties, the fourth component of antimony (Sb) was introduced into Ga<inf>0.8</inf>As<inf>39.2</inf>S<inf>60</inf> glass, and a serial Ga<inf>0.8</inf>As<inf>39.2-x</inf>Sb<inf>x</inf>S<inf>60</inf> (x = 0, 1, 3,5, 7, 9 and 11) novel chalcogenide glasses doped with 3000 ppmw Dy<sup>3+</sup> ions were prepared. The influences of antimony content on the physical properties, spectroscopic properties and fiber forming ability of glass were investigated. The experiment results indicate that the introduction of moderate antimony into glass effectively improves the fiber drawing performance and the spectroscopic properties of Dy<sup>3+</sup> ions. The Ga<inf>0.8</inf>As<inf>34.2</inf>Sb<inf>5</inf>S<inf>60</inf> composition glass possesses the best performance and it is recommended a good candidate for mid-infrared laser working medium.<br/></div> © 2022 Elsevier Ltd and Techna Group S.r.l.
Number of references:29
Main heading:Infrared devices
Controlled terms:Antimony - Antimony compounds - Chalcogenides - Fibers - Gallium compounds - Glass - Metal ions - Rare earths - Sulfur compounds
Uncontrolled terms:Chalcogenide glass - Drawing performance - Fiber drawing - Forming ability - Infrared fibers - Infrared fluorescences - Mid-infrared fluorescence - Midinfrared - Rare earth ions - Spectroscopic property
Classification code:531.1 Metallurgy - 546.4 Antimony and Alloys - 804.2 Inorganic Compounds - 812.3 Glass
Numerical data indexing:Electrical conductance 3.92E+01S, Electrical conductance 5.00E+00S
DOI:10.1016/j.ceramint.2022.05.247
Funding details: Number: JCTD-2018-19, Acronym: -, Sponsor: -;Number: 2021JCJQLB055003, Acronym: -, Sponsor: -;Number: 61935006,62005312,62090065, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: IOSKL2020KF11, Acronym: SKLIOE, Sponsor: State Key Laboratory on Integrated Optoelectronics;
Funding text:This work was financially supported by the National Natural Science Foundation of China (Grants Nos. 62090065 , 61935006 , and 62005312 ), CAS Interdisciplinary Innovation Team Project (No. JCTD-2018-19 ), and Open Funds of the State Key Laboratory of Integrated Optoelectronics (No. IOSKL2020KF11 ) and the Science and Technology on Electro-Optical Information Security Control Laborator (No. 2021JCJQLB055003 ), which are highly acknowledged.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 31>
Accession number:20225113262637
Title:Discussion on spatial resolution of microscopic imaging system (invited)
Title of translation:显微成像系统分辨率问题讨论 (特邀)
Authors:Dang, Shipei (1, 2); Li, Runze (1); Zhou, Meiling (1); Qian, Jia (1); Dan, Dan (1); Yu, Xianghua (1); Yao, Baoli (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yao, Baoli
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:20220735
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Spatial resolution is a key specific parameter of the optical microscopic imaging system. According to the optical diffraction theory, the spatial resolution of imaging system is determined by the wavelength of illumination light and the numerical aperture of microscope objective. In the practical imaging process, the resolutions of microscopic imaging system obtained from different criteria are slightly different. It is necessary to select an appropriate criterion according to the coherence of light sources and the structural characteristics of obsversed targets to accurately calculate the resolutions of imaging system. In this paper, the calculation methods for spatial resolution under different conditions are provided via theoretical analysis and numerical simulation. Furthermore, we compare and discusse the difference of imaging resolutions under the illuminations of coherent and incoherent light sources for double points and double slits targets, respectively.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:14
Main heading:Imaging systems
Controlled terms:Image resolution - Light sources - Numerical methods
Uncontrolled terms:Coherent and incoherence light illumination - Diffraction theory - Illumination light - Light illumination - Microscopic imaging - Optical diffractions - Optical microscopic imaging - Optical- - Resolution criteria - Spatial resolution
Classification code:746 Imaging Techniques - 921.6 Numerical Methods
DOI:10.3788/IRLA20220735
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 32>
Accession number:20220711646216
Title:Experimental demonstration of optical trapping and manipulation with multifunctional metasurface
Authors:Li, Xingyi (1, 2); Zhou, Yuan (1, 2); Ge, Suyang (1, 2); Wang, Guoxi (1, 2); Li, Siqi (1); Liu, Zilei (1, 2); Li, Xing (1, 2); Zhao, Wei (1, 2); Yao, Baoli (1, 2); Zhang, Wenfu (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Wang, Guoxi(wangguoxi@opt.cn); Yao, Baoli(yaobl@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:4
Issue date:February 15, 2022
Publication year:2022
Pages:977-980
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Chip-scale optical tweezers, which are usually implemented in a planar format without using bulky diffractive optical elements, are recognized as a promising candidate to be integrated with a lab-on-a-chip system. However, traditional chip-scale optical tweezers are often static and allow for only one type of manipulation functionality since the geometrical parameters of the tweezers are fixed. Herein, we introduce a new, to the best of our knowledge, class of on-chip optical tweezers for diverse types of manipulation of micro-particles. Utilizing both the propagation phase and Pancharatnam-Berry phase, we experimentally demonstrate the spin-dependent trapping, moving, and circling of micro-particles with the transfer of optical gradient force and orbital angular momentum to particles. We further show that the spin angular momentum of the output beam provides an additional degree of freedom to control the spinning rotation of particles. This new type of optical tweezers paves the way for multifunctional and dynamical trapping and manipulation of particles with a lab-on-a-chip system.<br/></div> © 2022 Optica Publishing Group
Number of references:29
Main heading:Geometry
Controlled terms:Optical tweezers - Angular momentum - Degrees of freedom (mechanics)
Uncontrolled terms:Chip-scale - Experimental demonstrations - Lab-on-a-chip systems - Metasurface - Micro particles - On chips - Optical trapping and manipulation - Optical- - Pancharatnam-Berry phase - Propagation phasis
Classification code:744.9 Laser Applications - 921 Mathematics - 931.1 Mechanics
DOI:10.1364/OL.450490
Funding details: Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funding. Strategic Priority Research Program of the Chinese Academy of Sciences (XDB24030600); National Natural Science Foundation of China (61635013).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 33>
Accession number:20224513074554
Title:Hybrid Wavelength- and Mode-division Multiplexing System Based on Microring Resonators with Mode Splitters
Title of translation:基于带有模式分离器的微环谐振器的波长-模式混合复用系统
Authors:Han, Xilin (1, 2); Zhang, Lingxuan (1, 2); Xue, Jintao (1, 2); Bao, Shenlei (1, 2); Wu, Jinyi (1, 2); Mi, Lei (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1113002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The applications of silicon photonics in data bearer networks， data centers and other scenarios will support high-speed data transmission. In order to meet the demand， lots of technologies in silicon photonics have emerged， such as Wavelength Division Multiplexing （WDM），Polarization Division Multiplexing （PDM） and Mode Division multiplexing （MDM）. To further increase the channel capacity， the hybrid multiplexing technology is studied based on the technologies above. Our work is such a hybrid WDM-MDM multiplexer. This paper focuses on the design of a microring resonator with mode splitter. First of all， the effect of mode splitting is better at a longer length， but we need to put the mode splitter into the microring resonator， and such a high mode separation efficiency and coupling efficiency will lead to low efficiency of microring resonance. So， we take the appropriate length. Secondly， an asymmetric structure for the geometry of the mode splitter is designed. One side of the structure is a waveguide with a width of 0.88 nm， allowing high order mode transmission， and the other side is a slot waveguide with a width of 0.86 nm， with an air gap of 50 nm in the middle. The advantage of this structure is that it can effectively split TE<inf>0</inf>and TE<inf>1</inf> modes. In addition， for microring resonators， we can select the desired resonant wavelength by designing appropriate parameters such as radius， waveguide width， coupling region length and gap. By simulating the proposed structure with the finite difference time domain method， the multiplexer and demultiplexer can realize ultra-compact WDM-MDM structure at C band. The microring resonator has a response of -0.66 dB to TE<inf>1</inf> mode input， a Q value of 3 692， and an optical bandwidth of 52 GHz. Its free spectral range is 1.03 THz， and the crosstalk generated by TE<inf>0</inf> mode is -11.0 dB. The insertion loss of the microring resonator is as low as -0.66 dB. Based on this， we also propose a transmitter-receiver MDM system with dual mode input. The simulation results show that the dual-mode input MDM system based on microring resonator can effectively separate TE<inf>0</inf> and TE<inf>1</inf> modes， and the microring also has the ability of wavelength selection. In addition， the through ports with fabrication tolerance from -10 nm to +15 nm have responses of less than -20 dB， while the response of the drop ports remains within -1 dB. Compared with other devices， our design has advantages in insertion loss， crosstalk and FSR. In conclusion， proposed system using wavelength-mode multiplexing mircroring can effectively separate the TE<inf>0</inf> and TE<inf>1</inf> modes and has the ability of wavelength selection， which may be the main device for ultra-compact hybrid multiplexing technology in near future.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:17
Main heading:Silicon photonics
Controlled terms:Data transfer - Demultiplexing - Efficiency - Finite difference time domain method - Multiplexing equipment - Optical communication - Optical resonators - Photonic devices - Waveguides
Uncontrolled terms:Dual modes - Hybrid multiplexing - Microring resonator - Microrings - Mode splitter - Mode-division multiplexing - Multiplexing technologies - Network data - Silicon photonics - Wavelength selection
Classification code:714.3 Waveguides - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 913.1 Production Engineering - 921 Mathematics
Numerical data indexing:Decibel -1.00E00dB, Decibel -1.10E+01dB, Decibel -2.00E+01dB, Decibel -6.60E-01dB, Frequency 1.03E+12Hz, Frequency 5.20E+10Hz, Size -1.00E-08m, Size 1.50E-08m, Size 5.00E-08m, Size 8.60E-10m, Size 8.80E-10m
DOI:10.3788/gzxb20225111.1113002
Funding details: Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No. 61635013）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 34>
Accession number:20222112156628
Title:One-dimensional purely Lee-Huang-Yang fluids dominated by quantum fluctuations in two-component Bose-Einstein condensates (Open Access)
Authors:Liu, Xiuye (1, 2); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Chaos, Solitons and Fractals
Abbreviated source title:Chaos Solitons Fractals
Volume:160
Issue date:July 2022
Publication year:2022
Article number:112240
Language:English
ISSN:09600779
CODEN:CSFOEH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Lee-Huang-Yang (LHY) fluids are an exotic quantum matter dominated purely by quantum fluctuations. Recently, the three-dimensional LHY fluids were observed in ultracold atoms experiments, while their low-dimensional counterparts have not been well known. Herein, based on the Gross-Pitaevskii equation of one-dimensional LHY quantum fluids in two-component Bose-Einstein condensates, we reveal analytically and numerically the formation, properties, and dynamics of matter-wave structures therein. Considering a harmonic trap, approximate analytical results are obtained based on variational approximation, and higher-order nonlinear localized modes with nonzero nodes are constructed numerically. Stability regions of all the LHY nonlinear localized modes are identified by linear-stability analysis and direct perturbed numerical simulations. Movements and oscillations of single localized mode, and collisions between two modes, under the influence of different initial kicks are also studied in dynamical evolutions. The predicted results are available to quantum-gas experiments, providing a new insight into LHY physics in low-dimensional settings.<br/></div> © 2022 Elsevier Ltd
Number of references:51
Main heading:Linear stability analysis
Controlled terms:Statistical mechanics - Bose-Einstein condensation - Quantum chemistry
Uncontrolled terms:Bose-Einstein condensates - Cold atoms - Lee-huang-yang fluid - Low dimensional - Nonlinear localized modes - One-dimensional - Quantum fluctuation - Quantum matter - Two-component - Ultracold atoms
Classification code:801.4 Physical Chemistry - 921 Mathematics - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.1016/j.chaos.2022.112240
Funding details: Number: XAB2021YN18, Acronym: -, Sponsor: -;Number: 12074423, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (No. 12074423 ) and Young Scholar of Chinese Academy of Sciences in western China (No. XAB2021YN18 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 35>
Accession number:20220511582168
Title:Overcoming the snaking instability and nucleation of dark solitons in nonlinear Kerr media by spatially inhomogeneous defocusing nonlinearity
Authors:Liu, Xiuye (1, 2); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Chaos, Solitons and Fractals
Abbreviated source title:Chaos Solitons Fractals
Volume:156
Issue date:March 2022
Publication year:2022
Article number:111803
Language:English
ISSN:09600779
CODEN:CSFOEH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Dark solitons, localized nonlinear waves with center notch standing on a stable uniform background, own rich formation and dynamics for physics and applications in diverse fields, and have thus recently attracted many theoretical and experimental studies. Transverse modulational instability is an impeditive factor for dark solitons in multidimensional space, to stabilize them various methods have been proposed. We here take use of a purely nonlinear strategy by introducing quasi-one-dimensional Gaussian like trap, and its combination with the external linear harmonic trap, in the framework of the (2 + 1)-dimensional Gross-Pitaveski/nonlinear Schrödinger equation, to realize the stabilization mechanism of dark-soliton stripes. Variational approximation analytical method, linear-stability analysis and direct perturbed numerical simulations are adopted to carry out the study, and agreement is reached. We demonstrate that the dark-soliton stripes can be stabilized completely, and the associated modulational instability wave number band is reduced greatly. Particularly, in the case of linear harmonic trap, the nucleation of dark solitons, subjected to snaking instability, can be overcome by the nonlinear trap with both defocusing and focusing strengths. The predicted results may be realized in Bose-Einstein condensates and nonlinear optics.<br/></div> © 2022 Elsevier Ltd
Number of references:79
Main heading:Nucleation
Controlled terms:Control nonlinearities - Linear stability analysis - Nonlinear optics - Solitons - Nonlinear equations - Nonlinear analysis - Numerical methods - Modulation - Statistical mechanics - Bose-Einstein condensation
Uncontrolled terms:Dark solitons - Defocusing - Harmonic trap - Localised - Modulational instability - Nonlinear Kerr medium - Nonlinear schrödinge equation - Nonlinear waves - Snaking instability - Spatially inhomogeneous
Classification code:731.1 Control Systems - 741.1.1 Nonlinear Optics - 921 Mathematics - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 933.1.2 Crystal Growth
DOI:10.1016/j.chaos.2022.111803
Funding details: Number: 61690222,12074423,61690224, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 61690224, 61690222,12074423).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 36>
Accession number:20222812338068
Title:A hybrid method combining discharge-assisted laser induced breakdown spectroscopy with wavelet transform for trace elemental analysis in liquid targets
Authors:Xu, Boping (1, 2); Liu, Simeng (1, 2); Lei, Bingying (1, 2); Liu, Yinghua (1, 2); Zhang, Wenfu (1, 2); Tang, Jie (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Duan, Yixiang (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Northwest University, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Journal of Analytical Atomic Spectrometry
Abbreviated source title:J Anal At Spectrom
Volume:37
Issue:6
Issue date:May 6, 2022
Publication year:2022
Pages:1350-1359
Language:English
ISSN:02679477
E-ISSN:13645544
CODEN:JASPE2
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">Laser-induced breakdown spectroscopy (LIBS) represents a highly promising detection technology for the quantitative determination of trace elements in liquids. However, due to plasma fast quenching, liquid level instability, and limited laser-energy absorption, rapid real-time quantitative detection of trace elements with high-sensitivity in liquid targets remains significantly challenging. Here, a feasible hybrid method of discharge-assisted laser-induced breakdown spectroscopy (D-LIBS) with wavelet transform de-noising (WTDN) was proposed for trace metal element analysis in oil pollutants. Compared to conventional laser-induced breakdown spectroscopy (C-LIBS), this method has the capacity to increase signal intensities of trace metal elements by one order of magnitude. For the Ca element, the signal to noise ratio (SNR) is increased by 16-fold with the optimal wavelet basis and decomposition layer in WTDN. Examining the LoDs of Al, Ba, Ca, Cr, Fe, Na, and Zn shows that D-LIBS with WTDN allows the LoDs to be lowered to 1/2-1/24 of the original level. And the LoDs of Ca and Ba are measured to be as low as 0.32 mg L<sup>−1</sup> and 0.69 mg L<sup>−1</sup>, respectively, which are reduced by one order of magnitude compared to those of C-LIBS. Moreover, the standard addition method analyzed the recoveries of Ba and Fe elements in the real samples of spiked lubricating oils to evaluate the method’s trueness. Superior accuracy and repeatability are obtained by D-LIBS, and the mean recoveries are in the range of 101.81-105.45%. In addition, partial least squares regression (PLSR) and support vector regression (SVR) models were established to predict the metal concentration. Thanks to this hybrid method, the PLSR model allows the coefficient of determination (R<inf>P</inf><sup>2</sup>) to increase from 0.4710 to 0.9250, and the SVR model allows the R<inf>P</inf><sup>2</sup> to increase from 0.4590 to 0.9876. Our work provides an alternative, economical, and reliable method for rapid real-time quantitative analysis of trace metal elements with high-sensitivity in various industrial applications associated with oil pollutants.<br/></div> © 2022 The Royal Society of Chemistry
Number of references:53
Main heading:Least squares approximations
Controlled terms:Atomic emission spectroscopy - Laser induced breakdown spectroscopy - Liquids - Metal analysis - Metals - Plasma diagnostics - Plasma stability - Pollution - Signal to noise ratio - Spectrum analysis - Trace analysis - Trace elements - Wavelet decomposition
Uncontrolled terms:Conventional lasers - De-noising - High sensitivity - Hybrid method - Laserinduced breakdown spectroscopy (LIBS) - Liquid target - Real- time - Trace metal element - Traces elements - Wavelets transform
Classification code:716.1 Information Theory and Signal Processing - 801 Chemistry - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 931.1 Mechanics - 932.3 Plasma Physics
Numerical data indexing:Mass density 3.20E-04kg/m3, Mass density 6.90E-04kg/m3, Percentage 1.0181E+02% to 1.0545E+02%
DOI:10.1039/d2ja00140c
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 51877210 and 52177166), the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-309), the Natural Science Basic Research Program of Shaanxi (Grant No. 2019JCW-03), the Key Deployment Research Program of XIOPM (Grant No. S19-020-III), the Major Science and Technology Infrastructure Pre-research Program of the CAS (Grant No. J20-021-III), and the Open Research Fund of the Key Laboratory of Spectral Imaging Technology of the CAS (Grant No. LSIT201807G).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 37>
Accession number:20220611611863
Title:Nanosecond-scale all-optical Ti<inf>3</inf>C<inf>2</inf>T <inf>x</inf>-MXene modulator
Authors:Li, Erkang (1); Jiang, Man (1); Li, Duidui (1); Wang, Ruiduo (2); Kang, Xin (1); Wang, Tianqi (1); Ren, Zhaoyu (1)
Author affiliation:(1) State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics and Photon-Technology, Northwest University, Xi'an; 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:15
Issue:2
Issue date:February 2022
Publication year:2022
Article number:022008
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:IOP Publishing Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Inspired by recent advancements of graphene-based ultrafast photonic devices, Ti3C2T x-MXene, as a graphene-like two-dimensional layer-structure material, has gained extensive interest in nonlinear optical applications, especially in all-optical intensity modulation. Herein, we successfully fabricated an all-optical modulator based on Ti3C2T x-Mxene/polyvinyl-alcohol film with nanosecond-scale response time, modulation speed of 100 kHz, and modulation depth of 10%. Furthermore, the variation of fall edges of modulated signal pulse caused by thermo-optic effect under different pump power was also observed. Considering the ease of fabrication, low cost, and ease of integration, the proposed modulator may open the door for high-speed all-optical communications and signal processing.<br/></div> © 2022 The Japan Society of Applied Physics.
Number of references:32
Main heading:Light modulators
Controlled terms:Optical communication - Optical signal processing - Light modulation - Graphene - Optical pumping - Photonic devices
Uncontrolled terms:All optical - Graphene likes - Layer structures - Modulation speed - Nonlinear optical applications - Optical intensity modulation - Structure materials - Time-modulation - Two-dimensional - Ultrafast photonic devices
Classification code:717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally
Numerical data indexing:Frequency 1.00E+05Hz, Magnetic flux density 2.00E+00T, Percentage 1.00E+01%
DOI:10.35848/1882-0786/ac4a12
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 38>
Accession number:20223112456898
Title:The generation of broadband photosource in fiber amplifier with different seed lasers - soliton and dissipative soliton pulse
Authors:Zhang, Chenxi (1); Li, Xiaohui (1); Han, Yueheng (1); Mu, Ye (1); Shi, Yuan (2); Wang, Yishan (3); Zhao, Wei (3)
Author affiliation:(1) School of Physics & Information Technology, Shaanxi Normal University, Shaanxi, Xi'an; 710000, China; (2) Shaanxi al wave Lasers Science & Technology Co. Ltd, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:156
Issue date:December 2022
Publication year:2022
Article number:108450
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Soliton and dissipative soliton have different pulse width, pulse energy, and propagation behaviors. The results are quite different for the generation of broadband photosource. In this work, broadband photosource with a wide spectral range based on two pulsed seed lasers is investigated. A high flatness spectrum with a bandwidth greater than 300 nm and predicted spectrum up to 2000 nm covering Er and Tm emission regime has been obtained by amplifying soliton pulsed laser. 370-mW higher average power broadband photosource has been obtained based on the amplification of dissipative soliton lasers. The proposed broadband photosource does not need to add further nonlinear medium in case of introducing unnecessary losses. These results pave the way for the realization of broadband, high flatness spectrum, compact light sources, and the use of all-fiber optic structure to lay the foundation for integration and detection applications, etc.<br/></div> © 2022 Elsevier Ltd
Number of references:36
Main heading:Solitons
Controlled terms:Broadband amplifiers - Erbium doped fiber amplifiers - Pulsed lasers
Uncontrolled terms:Broadband photosource - Dissipative solitons - Doped fiber amplifier - Double-cladding - Double-cladding er/yb co-doped fiber amplifier - Er/Yb co-doped fiber - Seed lasers - Spectra's - Tunable seed laser - Tunables
Classification code:713.1 Amplifiers - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.7 Laser Components
Numerical data indexing:Size 2.00E-06m, Size 3.00E-07m
DOI:10.1016/j.optlastec.2022.108450
Funding details: Number: 1110010717,1112010209,2020KW-005, Acronym: -, Sponsor: -;Number: 18QNGG006, Acronym: -, Sponsor: Shaanxi Normal University;Number: 2020CSLZ002,GK202103013, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This research was supported by the Funded projects for the Academic Leader and Academic Backbones, Shaanxi Normal University (No. 18QNGG006); the International Science & Technology Cooperation and Exchanges Project of Shaanxi (No. 2020KW-005); Starting Grants of Shaanxi Normal University (Nos. 1112010209 and 1110010717); Fundamental Research Funds for the Central Universities (No. 2020CSLZ002 and GK202103013).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 39>
Accession number:20222912380275
Title:Large-field lattice structured illumination microscopy (Open Access)
Authors:Zheng, Juanjuan (1, 2); Fang, Xiang (1); Wen, Kai (1); Li, Jiaoyue (1); Ma, Ying (1); Liu, Min (1); An, Sha (1, 2); Li, Jianlang (1); Zalevsky, Zeev (3); Gao, Peng (1)
Author affiliation:(1) School of Physics, Xidian University, Xi'an; 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Bar-Ilan University, Faculty of Engineering, Nano Technology Center, Ramat-Gan, Israel
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:15
Issue date:July 18, 2022
Publication year:2022
Pages:27951-27966
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we present large-field, five-step lattice structured illumination microscopy (Lattice SIM). This method utilizes a 2D grating for lattice projection and a spatial light modulator (SLM) for phase shifting. Five phase-shifted intensity images are recorded to reconstruct a super-resolution image, enhancing the imaging speed and reducing the photo-bleaching both by 17%, compared to conventional two-direction and three-shift SIM. Furthermore, lattice SIM has a three-fold spatial bandwidth product (SBP) enhancement compared to SLM/DMDbased SIM, of which the fringe number is limited by the SLM/DMD pixel number. We believe that the proposed technique will be further developed and widely applied in many fields.<br/></div> © 2022 Optica Publishing Group.
Number of references:43
Main heading:Image enhancement
Controlled terms:Dynamic mode decomposition - Light modulation - Light modulators
Uncontrolled terms:2D grating - Five-phase - Intensity images - Larger fields - Phase shifted - Phase-shifting - Resolution images - Spatial light modulators - Structured illumination - Superresolution
Classification code:741.1 Light/Optics
Numerical data indexing:Percentage 1.70E+01%
DOI:10.1364/OE.461615
Funding details: Number: 2019JJ012, Acronym: -, Sponsor: -;Number: 3-18137, Acronym: MOST, Sponsor: Ministry of Science, Technology and Space;Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021-2022, Acronym: -, Sponsor: International Cooperation and Exchange Programme;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2021YFF0700300,2022YFE0100700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QTZX22039,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Natural Science Foundation of China (62075177, 12104354, 62105251); National Key Research and Development Program of China (2021YFF0700300, 2022YFE0100700); Ministry of Science, Technology and Space (3-18137); International Cooperation and Exchange Programme (2021-2022); China Scholarship Council; Fundamental Research Funds for the Central Universities (QTZX22039, XJS210504); Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermantation, China National Light Industry (2019JJ012); State Key Laboratory of Transient Optics and Photonics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 40>
Accession number:20222812352552
Title:Numerical modeling and optimization of hundred-watt-level 2.8 μm and 1.6 μm cascaded heavily-erbium-doped fluoride fiber amplifiers
Authors:Xiao, Yang (1, 2); Xiao, Xusheng (1, 2); Xu, Yantao (1, 2); She, Shengfei (1, 2); Liu, Chengzhen (1, 2); Guo, Haitao (1, 2)
Author affiliation:(1) The State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaan'xi, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Xiao, Xusheng(xiaoxusheng@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:155
Issue date:November 2022
Publication year:2022
Article number:108418
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a continuous-wave dual-seed cascaded heavily erbium-doped fluoride fiber amplifier scheme with a 981 nm bi-directional pump configuration for hundred-watt-level power scaling for the first time. When the powers of the 2.8 μm and 1.6 μm seed lasers and the total pump light are 5 W, 20 W, and 300 W, respectively, the 2.8 μm laser theoretically achieves an output power of ∼100 W. The amplifier scheme can also reduce the fiber temperature. Additionally, the results show that there is no excited state absorption at ∼1.675 μm, and thus injecting a 1.675 μm laser to the amplifier is not conducive to the power scaling.<br/></div> © 2022 Elsevier Ltd
Number of references:43
Main heading:Numerical models
Controlled terms:Erbium compounds - Erbium doped fiber amplifiers - Excited states - Fibers - Fluorine compounds - Pumping (laser)
Uncontrolled terms:Bi-directional - Cascade amplification - Continuous Wave - Erbium doped - Fluoride fibre - Heavily erbium doped - Modeling and optimization - Power-scaling - Pump configuration - Watt levels
Classification code:741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.7 Laser Components - 921 Mathematics - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics
Numerical data indexing:Power 1.00E+02W, Power 2.00E+01W, Power 3.00E+02W, Power 5.00E+00W, Size 1.60E-06m, Size 1.675E-06m, Size 2.80E-06m, Size 9.81E-07m
DOI:10.1016/j.optlastec.2022.108418
Funding details: Number: 61935006,62005312,62090065, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022409, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: IOSKL2020KF11, Acronym: SKLIOE, Sponsor: State Key Laboratory on Integrated Optoelectronics;Number: 2022GY-423, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China (62090065, 62005312, and 61935006), Youth Innovation Promotion Association of the Chinese Academy of Sciences (2022409), Key Research and Development Projects of Shaanxi Province (2022GY-423), and the Open Fund of the State Key Laboratory of Integrated Optoelectronics (IOSKL2020KF11).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 41>
Accession number:20222312194634
Title:Use of electrochemistry in mini-/micro-LEDs and VCSELs
Authors:Kang, Jin-Ho (1); Elafandy, Rami (1); Li, Bingjun (1); Song, Jie (2); Han, Jung (1)
Author affiliation:(1) Department of Electrical Engineering, Yale University, New Haven; CT; 06520, United States; (2) Sate Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Han, Jung(jung.han@yale.edu)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12022
Part number:1 of 1
Issue title:Light-Emitting Devices, Materials, and Applications XXVI
Issue date:2022
Publication year:2022
Article number:120220C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510649156
Document type:Conference article (CA)
Conference name:Light-Emitting Devices, Materials, and Applications XXVI 2022
Conference date:February 20, 2022 - February 24, 2022
Conference location:Virtual, Online
Conference code:179363
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As optoelectronic semiconductor research reaches a level of saturation, incorporation of unconventional processes and techniques often add to new phenomena and opportunities. In this manuscript, we share our perspective regarding the application of electrochemistry to GaN and related compound semiconductors. Two specific examples of using nanoporous structures, created by electrochemistry, for mini-/micro- LEDs and for vertical cavity surface emitting lasers (VCSELs) are discussed.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:25
Main heading:Etching
Controlled terms:DBR lasers - Electrochemistry - Gallium nitride - III-V semiconductors - Semiconductor lasers - Surface emitting lasers - Wide band gap semiconductors
Uncontrolled terms:Blue lasers - Compound semiconductors - DBR - EC etching - Microled - MiniLED - Nanoporous GaN - Nanoporous structures - Related compounds - RGB array
Classification code:712.1 Semiconducting Materials - 744 Lasers - 744.4.1 Semiconductor Lasers - 744.7 Laser Components - 801.4.1 Electrochemistry - 802.2 Chemical Reactions
DOI:10.1117/12.2611573
Funding details: Number: -, Acronym: NSF, Sponsor: National Science Foundation;Number: -, Acronym: USDOE, Sponsor: U.S. Department of Energy;Number: -, Acronym: DARPA, Sponsor: Defense Advanced Research Projects Agency;
Funding text:The research has been supported by US Department of Energy, National Science Group.The research has been supported by US Department of Energy, National Science Foundation, DARPA, Saphlux, and IP Group.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 42>
Accession number:20221511963338
Title:Direct Amination of Benzene with Molecular Nitrogen Enabled by Plasma-Liquid Interactions
Authors:Xu, Xia (1); Zhao, Xuyang (1); Tang, Jie (2); Duan, Yixiang (1); Tian, Yong-Hui (1)
Author affiliation:(1) Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Shaanxi, Xi'an; 710027, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Shaanxi, Xi'an; 710119, China
Corresponding authors:Duan, Yixiang(yduan@nwu.edu.cn); Tian, Yong-Hui(tyh2018@nwu.edu.cn)
Source title:Angewandte Chemie - International Edition
Abbreviated source title:Angew. Chem. Int. Ed.
Volume:61
Issue:24
Issue date:June 13, 2022
Publication year:2022
Article number:e202203680
Language:English
ISSN:14337851
E-ISSN:15213773
CODEN:ACIEF5
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Nitrogen fixation is industrially realized by mass production of ammonia, the principal intermediate nitrogen source for N-containing organic molecules. Instead, direct C−N bond formation from dinitrogen (N<inf>2</inf>) is of great interest but remains a challenge. Here, by virtue of unique plasma–liquid interactions, we developed an environmentally benign one-pot approach to directly couple benzene and N<inf>2</inf>, two naturally abundant yet chemically inert molecules, into value-added arylamines. Under the optimal conditions, an amination yield of 45 % was rapidly achieved, far better than the reported benzene amination efficiency using ammonia. A tentative reaction mechanism was proposed involving the long-lived N<inf>2</inf> (A<sup>3</sup> (Formula presented.)) and N<inf>2</inf><sup>+</sup> species, as evidenced by the key intermediates detected. With a deeper mechanistic understanding and by further optimizing the plasma reactor, the realization of cost-effective electrical amination of benzene with N<inf>2</inf> could become reality.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:53
Main heading:Benzene
Controlled terms:Liquids - Molecules - Nitrogen plasma - Ammonia - Cost effectiveness - Amines - Plasma applications
Uncontrolled terms:Bond formation - Direct amination - Green synthesis - Liquid interactions - Mass production - Molecular nitrogen - Nitrogen sources - Organic molecules - Plasma liquid - Plasma–liquid interaction
Classification code:804.1 Organic Compounds - 804.2 Inorganic Compounds - 911.2 Industrial Economics - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics
Numerical data indexing:Percentage 4.50E+01%
DOI:10.1002/anie.202203680
Funding details: Number: 51877210, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JM‐434, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019ZDLSF01‐03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:We acknowledge the financial support from the Natural Science Foundation of Shaanxi Province (2020JM‐434), the Key Research and Development Program of Shaanxi Province (2019ZDLSF01‐03), the National Natural Science Foundation of China (51877210). We are indebted to Dr. Jingsong Huang from Oak Ridge National Laboratory for helpful discussion of the manuscript.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 43>
Accession number:20230813622816
Title:The Effect of Temperature and Salinity on Imaging Quality of Optical System in Underwater Turbulence
Title of translation:水 下 湍 流 中 温 度、盐 度 对 光 学 系 统 成 像 质 量 影 响分 析
Authors:Sun, Shuwei (1, 2, 3); Wang, Hao (2, 3); Wang, Wei (1, 2); Li, Peng (1, 2); Kang, Fuzeng (2); Xie, Xiaoping (1, 2)
Author affiliation:(1) Laboratory of Photonics and Network, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Wei(wangwei2012@opt.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:12
Issue date:2022
Publication year:2022
Article number:1211004
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Underwater imaging technology is a critical means to explore the ocean. With the development of underwater imaging technology，it is found that underwater turbulence is an important factor that restricts the imaging quality of optical system. Turbulence is a phenomenon of small vortices occurring at the interface due to different flow rates of each part of the medium. This physical phenomenon can directly lead to changes in the refractive index of the medium. Thus，it can change the wavefront structure of the beam，affect the modulation transfer function，and ultimately cause the degradation of the image quality at the receiving end. Most of the studies about turbulence on beam is based on refractive index and power spectrum，and the researches on turbulence is based on Nikishov's power spectrum. In this power spectrum，eddy diffusion rate is constant，does not relate to the average water temperature and the average salinity which can influence on eddy diffusion rate. Thus，the turbulence caused by the refractive index models still needs further refinement. Later，some scholars improved the refractive index fluctuation power spectrum. In this model，the average temperature and average salinity are used to characterize the vortex diffusion rate，and the refractive index fluctuation power spectrum model based on temperature and salinity is established. Compared with Nikishov's power spectrum，the power spectrum model is more complete，but the temperature variance dissipation rate and kinetic energy dissipation rate used to characterize turbulence intensity cannot be measured in the experiment，resulting in a gap between the simulation model and practical applications. In order to study the effect of underwater turbulence on the imaging quality of optical systems，we deduced the wave structure function and established an underwater optical imaging model based on the refractive index fluctuation power spectrum contained with temperature and salinity. The effects of temperature and salinity on the modulation transfer function under turbulent conditions are simulated. For verifying the reliability of the turbulence imaging model，a 3-m long underwater optical imaging experiment platform is designed and built. A water pump and water tank are used to create a turbulence region with controllable turbulence intensity. A CCD camera also plays a part of the region to image the resolution plate，thus analyzing the imaging quality. By controlling the experimental conditions，the imaging results under different temperatures and different salinity conditions are obtained. On this basis，the modulation transfer function is analyzed after the ensemble average obtained by several experiments. The results show that the modulation transfer function of the image decreases with the increase of temperature and salinity. Further studies show that the contrast of different spatial frequencies decreases linearly with the increase of salinity，and the decrease amplitude is basically the same. With the increase of temperature，the MTF basically conforms to the linear decline law，and the MTF of high-frequency components decreases faster. The experimental results show that the imaging quality under turbulent conditions is affected more by temperature than salinity，and the experimental results are consistent with the simulation results. This research has certain reference value for the design optimization and development of underwater optical systems.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:21
Main heading:Optical transfer function
Controlled terms:CCD cameras - Diffusion - Energy dissipation - Kinetic energy - Kinetics - Optical signal processing - Optical systems - Power spectrum - Refractive index - Temperature - Turbulence - Underwater imaging - Vortex flow - Water tanks
Uncontrolled terms:Condition - Diffusion rate - Effects of temperature - Fluctuation power - Imaging quality - Power-spectra - Refractive index fluctuations - Salinity - Underwater turbulence - Wave structure function
Classification code:446.1 Water Supply Systems - 525.4 Energy Losses (industrial and residential) - 619.2 Tanks - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 746 Imaging Techniques - 931 Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Size 3.00E+00m
DOI:10.3788/gzxb20225112.1211004
Funding details: Number: XDA22030203, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018YFC0307904, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: XAB2019B22, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:National Key Research and Development Program of China（No.2018YFC0307904），Class A Strategic Priority Research Program of the Chinese Academy of Sciences（No. XDA22030203），West Light Foundation of the Chinese Academy of Science（No. XAB2019B22）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 44>
Accession number:20224313002036
Title:Optimal bright multimode quantum squeezing via multi-seeding energy-level cascaded four-wave mixing (Open Access)
Authors:Jiawei, Li (1, 2, 3); Jianhua, Zeng (2, 3); Feng, Li (1); Yanpeng, Zhang (1); Yin, Cai (1)
Author affiliation:(1) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an; 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yin, Cai(caiyin@xjtu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:22
Issue date:October 24, 2022
Publication year:2022
Pages:39762-39774
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Quantum Squeezing is one of the most important quantum resources in quantum optics and quantum information. In particular, multimode quantum squeezing, with ultra-low quantum fluctuations and quantum correlations amongst many optical modes, is essential for realizing multipartite entanglement and quantum precision measurements. In this paper, we propose an all-optically controlled scheme to generate three-mode bright quantum correlated beams from energy-level cascaded four-wave mixing (ELC-FWM). By using a linear modes transform approach, the input-output relation and the covariance matrix of the produced states are obtained. Moreover, single-, double- and triple-seeding conditions are investigated to measure the quantum squeezing properties. We find that various permutations of two- and three-mode quadrature squeezing can be generated and optimized to reach the corresponding limit, via only modulating the ratio of the multiple seeds, without need of any post-operating linear optics, e.g., beam splitters. Such weak seeding light controlled scheme suggests the modulation and the optimization of multimode quantum states might be operated at photons-level, providing a reconfigurable and integrated strategy for complex quantum information processing and quantum metrology.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:50
Main heading:Quantum optics
Controlled terms:Covariance matrix - Four wave mixing - Light - Quantum entanglement
Uncontrolled terms:Cascaded four-wave mixing - Multimodes - Multipartite entanglements - Optical modes - Optically controlled - Precision measurement - Quantum correlations - Quantum fluctuation - Quantum Information - Quantum resources
Classification code:741.1 Light/Optics - 921 Mathematics - 931.4 Quantum Theory; Quantum Mechanics
DOI:10.1364/OE.463900
Funding details: Number: 2021TD-56, Acronym: -, Sponsor: -;Number: 11904279,12074303,12074306,12174302,61975159,62022066, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303700,2018YFA0307500, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2017YFA0303700, 2018YFA0307500); National Natural Science Foundation of China (11904279, 12074303, 12074306, 12174302, 61975159, 62022066); Key Scientific and Technological Innovation Team of Shaanxi Province (2021TD-56).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 45>
Accession number:20221011751523
Title:Dark gap solitons in one-dimensional nonlinear periodic media with fourth-order dispersion
Authors:Li, Jiawei (1, 2, 3); Zhang, Yanpeng (2); Zeng, Jianhua (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an; 710049, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Chaos, Solitons and Fractals
Abbreviated source title:Chaos Solitons Fractals
Volume:157
Issue date:April 2022
Publication year:2022
Article number:111950
Language:English
ISSN:09600779
CODEN:CSFOEH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The studies of solitons are usually confined to the models with normal two-order dispersion or diffraction; while recent theoretical predictions and experimental observations have confirmed the important role that the fourth-order dispersion played in, leading to the discovery of a new class of solitons—quartic solitons in fibers. We here theoretically consider the one-dimensional (1D) periodic nonlinear media with both second-order and fourth-order dispersions, and uncover numerically the existence, properties, and stabilities of dark gap solitons populated within the associated linear photonic band gaps. Such gaps, particularly, are affected drastically by normal or anomalous fourth-order dispersion; the dark gap solitons are always found to be unstable for the latter, and are robustly stable and have a wide stability region for the former case, verified by linear-stability analysis and direct perturbed simulations. The obtained results provide insights into physics of dark gap solitons in higher-order dispersion regime.<br/></div> © 2022 Elsevier Ltd
Number of references:51
Main heading:Solitons
Controlled terms:Dispersions - Linear stability analysis - Nonlinear equations - Energy gap - Photonic band gap
Uncontrolled terms:Dark gap soliton - Fourth order dispersion - Gap soliton - In-fiber - Nonlinear medium - Nonlinear schrödinge equation - One-dimensional - Order dispersions - Periodic lattices - Periodic media
Classification code:921 Mathematics - 951 Materials Science
DOI:10.1016/j.chaos.2022.111950
Funding details: Number: 12074423, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (No. 12074423 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 46>
Accession number:20224413024210
Title:Multi-aperture High Resolution Imaging Technology Based on Plastic Imaging Fiber Array
Title of translation:基于塑料传像光纤阵列的多孔径高分辨成像技术
Authors:Du, Xiaorui (1, 2); Xu, Huangrong (2, 3); Li, Wenlong (1, 2); He, Zhengquan (1); Kong, Depeng (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710072, China
Corresponding author:Kong, Depeng(kongdp@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:9
Issue date:September 2022
Publication year:2022
Article number:0906003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Imaging fiber plays an important role in medicine， industry， aerospace and other fields because of its excellent flexibility， especially in the application of optical fiber endoscope in medicine. Optical fiber image transmission system is usually composed of imaging objective， imaging fiber and image sensor.At present， the number of pixels in cameras can reach millions or even tens of millions， but the number of pixels in optical fibers is usually only a few hundred thousand.Therefore， the resolution of the system is limited by the resolution of the imaging fiber itself， and the imaging resolution of the whole system basically depends on the number of pixels that the imaging fiber can transmit. At present， the imaging fiber bundles on the market have either high resolution but small total cross-sectional area， or large cross sectional size but fiber diameter up to ten microns. This phenomenon results in insufficient pixels and small image area of high resolution image fiber， while large cross section can not reach high resolution due to technological limitations. To solve the problems， this paper proposes a multi-aperture high-resolution imaging technology based on imaging fiber array， which uses the imaging fiber array and image Mosaic technology to break through the bottleneck of improving pixel number. The number of pixels in the system can be increased by using high resolution and small cross section imaging fiber arrays. Combined with the characteristics of overlapping imaging of microlens array， the problem of information loss caused by direct imaging of imaging fiber array can be solved and the integrity of optical fiber array imaging can be realized.This method is expected to increase the number of pixels in optical fiber image transmission system to millions of order of magnitude and improve the resolution of the system. The imaging fiber is designed to be arranged 6×8， and the microlens array is designed based on the imaging fiber array. There are two groups of aspherical lenses made of PMMA material， and the imaging fiber array and the two groups of microlens arrays have uniform positions. Add a telecentric objective lens in front of the microlens array as the main lens of the image transmission system to solve the problem of complete overlap of adjacent subgraphs caused by direct imaging of the microlens array. The focal length of the lens is 10.1 mm， the aperture coefficient is 6.3， and the field Angle is 88°. The simulation results show that both the main lens and the microlens array can meet the performance requirements of the imaging fiber， and the object information can be successfully transmitted to the imaging fiber. The modulation transfer function value of the system can reach more than 0.5 at 50 lp/mm， without weakening the quality of the primary image， and meet the resolution requirements of the imaging fiber. Experimental results show that the system contains 400 000 effective pixels and the system resolution is 40 lp/mm.The image is clear and complete， which proves that the design of the imaging system has a good feasibility， and has an important practical reference significance for improving the resolution of the optical fiber image transmission system.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:12
Main heading:Pixels
Controlled terms:Image enhancement - Image resolution - Imaging systems - Light transmission - Microlenses - Optical fibers - Optical instrument lenses
Uncontrolled terms:Fiber image transmissions - Fiber-array - High-resolution imaging - Image transmission systems - Imaging fiber array - Imaging fibers - Micro-lens arrays - Multi aperture - Multi-aperture imaging - Surveillance lens
Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques
Numerical data indexing:Size 1.01E-02m
DOI:10.3788/gzxb20225109.0906003
Funding details: Number: 62071465, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020GY-266, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 095920201317, Acronym: XAST, Sponsor: Xi'an Science and Technology Association;
Funding text:National Natural Science Foundation of China （No.62071465）， Key Research and Development Plan of Shaanxi Province（Nos.2021GY-048，2020GY-266）， Youth Talent Lift Project of Xi'an Science and Technology Association （No.095920201317）， "Light of the West" Talent Training Program of Chinese Academy of Sciences （No.XAB2021YN11）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 47>
Accession number:20220257031
Title:Complete and robust energy conversion by sum frequency generation based on Invariant Engineering
Authors:Zhang, Cong-Fu (1, 3); Wang, Zhao-Lu (1); Liu, Hong-Jun (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi’an; 710119, China; (2) Collabotative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (3) University of Chinese Academy of Sciences, Beijing; 100084, China
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 24, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">We propose an analytical method to achieve complete energy conversion in sum frequency generation based on Lewis-Riesenfeld invariants theory. This technique, derived from a two-level atom transition in quantum mechanics, is more efficient and robust than conventional methods. In our scheme, the quasi-adiabatic single control parameter model is established, and the value of single control parameter is selected to make the initial eigenstate perfectly converted to the final eigenstate we need. Corresponds to the nonlinear frequency conversion process, the nonlinear crystal structure is designed with the inverse engineering of optimal control theory, which is robust against the perturbations in the coupling coefficient and phase mismatch, including pump intensity and crystal polarization period variations, and results in almost 100% conversion efficiency at any crystal length. It is demonstrated that the frequency conversion can be achieved in the wavelength range of 2.6 μm -3.6 μm with a spectral bandwidth of the conversion efficiency over 50% approaching to 400 nm when the crystal length L=1 mm.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:31
Main heading:Conversion efficiency
Controlled terms:Atoms - Crystal structure - Interferometry - Quantum theory
Uncontrolled terms:Analytical method - Control parameters - Conventional methods - Crystal length - Eigenstates - Invariant theory - Parameter model - Robust energy - Sum frequency generation - Two-level atom
Classification code:525.5 Energy Conversion Issues - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 933.1.1 Crystal Lattice - 941.4 Optical Variables Measurements
Numerical data indexing:Percentage 1.00E+02%, Percentage 5.00E+01%, Size 1.00E-03m, Size 2.60E-06m to 3.60E-06m, Size 4.00E-07m
DOI:10.48550/arXiv.2206.12207
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.12207v3
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 48>
Accession number:20220411507549
Title:Component spectra extraction and quantitative analysis for preservative mixtures by combining terahertz spectroscopy and machine learning
Authors:Yan, Hui (1, 2, 3); Fan, Wenhui (1, 3, 4); Chen, Xu (1); Wang, Hanqi (1, 3); Qin, Chong (1, 3); Jiang, Xiaoqiang (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) College of Science, Zhongyuan University of Technology, Zhengzhou Key Laboratory of Low-dimensional Quantum Materials and Devices, Zhengzhou; 450007, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Fan, Wenhui(fanwh@opt.ac.cn)
Source title:Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Abbreviated source title:Spectrochim. Acta Part A Mol. Biomol. Spectrosc.
Volume:271
Issue date:April 15, 2022
Publication year:2022
Article number:120908
Language:English
ISSN:13861425
CODEN:SAMCAS
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Preservatives are universally used in synergistic combination to enhance antimicrobial effect. Identify compositions and quantify components of preservatives are crucial steps in quality monitoring to guarantee merchandise safety. In the work, three most common preservatives, sorbic acid, potassium sorbate and sodium benzoate, are deliberately mixed in pairs with different mass ratios, which are supposed to be the "unknown" multicomponent systems and measured by terahertz (THz) time-domain spectroscopy. Subsequently, three major challenges have been accomplished by machine learning methods in this work. The singular value decomposition (SVD) effectively obtains the number of components in mixed preservatives. Then, the component spectra are successfully extracted by non-negative matrix factorization (NMF) and self-modeling mixture analysis (SMMA), which match well with the measured THz spectra of pure reagents. Moreover, the support vector machine for regression (SVR) designed an underlying model to the target components and simultaneously identify contents of each individual component in validation mixtures with decision coefficient R<sup>2</sup> = 0.989. By taking advantages of the fingerprint-based THz technique and machine learning methods, our approach has been demonstrated the great potential to be served as a useful strategy for detecting preservative mixtures in practical applications.<br/></div> © 2022 Elsevier B.V.
Number of references:57
Main heading:Singular value decomposition
Controlled terms:Learning systems - Terahertz spectroscopy - Spectrum analysis - Mixtures - Non-negative matrix factorization - Time domain analysis - Support vector machines
Uncontrolled terms:Anti-microbial effects - Machine learning methods - Matrix factorizations - Negative matrix factorization - Preservative mixture - Quality monitoring - Spectra's - Support vector machine for regression - Support vectors machine - Synergistic combinations
Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics - 931.1 Mechanics
DOI:10.1016/j.saa.2022.120908
Funding details: Number: LSIT201913N, Acronym: -, Sponsor: -;Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was financially supported by the National Natural Science Foundation of China ( 61675230 , 61905276 ); Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences ( LSIT201913N ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 49>
Accession number:20223212536989
Title:Direct Modulation RZ-DPSK Signal Generation Technology Based on Chirp-Managed Lasers
Title of translation:基于啁啾管理激光器的直接调制RZ-DPSK 信号产生技术研究
Authors:Ma, Rong (1, 2, 3); Gao, Duorui (1, 2, 3); Wei, Sentao (1, 2); Xie, Zhuang (1, 2, 3); Wang, Wei (1, 2); Jia, Shuaiwei (1, 2, 3); Bai, Zhaofeng (1, 2); Xie, Xiaoping (1, 2, 3)
Author affiliation:(1) Laboratory of Photonics and Network, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics Technology, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Xie, Xiaoping(xxp@opt.ac.cn); Gao, Duorui(gaoduorui@opt.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:13
Issue date:July 2022
Publication year:2022
Article number:1306001
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective Due to its bandwidth advantage space laser communication has become an effective means to solve the bottleneck of microwave communication build a space-based broadband network and realize the real-time transmission of massive amount of earth observation data The space laser communication terminal has characteristics of small size lightweight low power consumption etc which are suitable for satellite payload and meet the increasing communication needs of aerospace activities In future each communication satellite will carry multiple laser communication terminals that can serve multiple targets simultaneously Therefore laser communication terminals are being developed in the direction of miniaturization and integration Traditional laser communication terminals use external modulation methods to achieve intensity or phase modulation of optical signals Optical transmitters comprise multiple independent components such as lasers modulators and bias controllers and the system's structure is complex The phase modulation of the optical signal is realized using the direct modulation of the chirp-managed laser CML without an external modulator bias controller etc with small size low power consumption low equipment complexity and low cost In addition it can adapt to the continuous high-speed and integrated development of optical communication networks Methods In this study the chirp effect of the CML is used for phase modulation to generate a return-to-zero differential phase shift keying RZ-DPSK signal RZ-DPSK has several advantages such as high sensitivity good reliability simple receiver and its receiving sensitivity is 3 dB higher than that of on-off keying OOK modulation method It has received extensive attention in the engineering field Using the chirp effect of the laser the phase shift of the optical field is achieved by controlling the magnitude of the injected current and the driving signal is simply pre-encoded using MATLAB to generate a three-level signal thereby accurately controlling the phase change of the carrier signal The error rate performance of RZ-DPSK estimated using this modulation method was tested and compared with that of the traditional external modulation method The performance difference between the two methods was analyzed Results and Discussions This study first uses the binary sequence 1110100 to verify the system principle The schematic of the transmitter and receiver experimental schemes are shown in Figures 3 and 7 and the signal rate is 2 5 Gb s The output wavelength of the CML laser is 1552 544 nm and the output optical power is 9 14 dBm The receiving end includes erbium-doped fiber amplifier EDFA optical filter optical delay interferometer and balanced detector to receive and demodulate RZ-DPSK optical signal and restore the baseband electrical signal To further reduce the spontaneous radiation noise caused by the amplification process an optical filter with a bandwidth of 0 05 nm is placed after the EDFA The signal waveform after demodulation is shown in Figure 8 27-1 pseudo-random binary sequence PRBS is used for bit error rate test The pseudo-random signal is demodulated by the delay interferometer and the output signal eye diagram of the balanced detector is shown in Figure 9 As a comparative experiment the receiving end based on LiNbO3 external modulation and the CML system use the same receiving device The schematic of the two systems is shown in Figure 10 The bit error rate curves of RZ-DPSK system based on CML transmitter and LiNbO3 transmitter are shown in the Figure 11 When the system error rate is 10-9 the receiving sensitivity of CML and LiNbO3 transmitters is -36 98 and -45 72 dBm respectively Compared with the LiNbO3 transmitter the sensitivity of the CML system is reduced by 8 74 dB When the error rate of the forward error correction limit is 10-3 the sensitivity of the CML transmitter is -48 1 dBm which is only 1 8 dB less than the -49 9 dBm of the LiNbO3 transmitter The error characteristics of the two are the same and thus an error-free transmission can be realized The CML transmitter has a simple structure small size and low power consumption and the performance of the receiver is equivalent to that of external modulation when the limit error rate of the forward error correction is 10-3 which shows a significant development prospect Conclusions This study introduces the principle of signal coding and modulation of CML laser and realizes the direct modulation of 2 5 Gb s RZ-DPSK signal based on the CML laser without differential coding and external modulator The performance index of the modulation signal is analyzed At the same time the bit error rate performance of the transmission system based on the CML laser and the system based on the LiNbO3 transmitter are compared The results show that the sensitivity of the transmitter based on the CML is -48 1 dBm when the limit bit error rate of forward error correction is 10-3 Compared with the sensitivity of LiNbO3-based transmitter system -49 9 dBm the difference of the sensitivity of CML-based transmitter system is only 1 8 dB and the error characteristics are basically the same Further the CML-based transmitter system has a good transmission performance In terms of hardware the CML-based transmitter system has a simpler structure low power consumption small size and lightweight which can better adapt to the continuous high-speed and integrated development of space optical communication networks.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:26
Main heading:Signal receivers
Controlled terms:Broadband networks - Complex networks - Controllers - Costs - Earth (planet) - Electric power utilization - Erbium doped fiber amplifiers - Interferometers - Light modulators - Logic gates - Low power electronics - Microwave photonics - Optical fiber communication - Optical signal processing - Optical transmitters - Phase shift - Phase shift keying
Uncontrolled terms:Chirp effects - Chirp managed lasers - Direct modulation - External modulation - Laser communication terminals - Low-power consumption - Lower-power consumption - Modulation methods - Return-to-zero differential phase-shift keying - RZ-DPSK
Classification code:706.1 Electric Power Systems - 717.1 Optical Communication Systems - 717.2 Optical Communication Equipment - 721.2 Logic Elements - 722 Computer Systems and Equipment - 732.1 Control Equipment - 741.1 Light/Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.7 Laser Components - 911 Cost and Value Engineering; Industrial Economics - 941.3 Optical Instruments
Numerical data indexing:Decibel 3.00E+00dB, Decibel 7.40E+01dB, Decibel 8.00E+00dB, Decibel milliwatts 1.00E00dBm, Decibel milliwatts 1.40E+01dBm, Decibel milliwatts 7.20E+01dBm, Decibel milliwatts 9.00E+00dBm, Size 5.00E-09m, Size 5.44E-07m
DOI:10.3788/CJL202249.1306001
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 50>
Accession number:20222812345476
Title:Phase image correlation spectroscopy for detecting microfluidic dynamics
Authors:Yu, Lan (1); Wang, Yu (1); Wang, Yang (1); Zhuo, Kequn (1); Ma, Ying (1); Liu, Min (1); Zheng, Juanjuan (1, 2); Li, Jianlang (1); Li, Junhua (3); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Key Laboratory of Jiangxi Province for Image Processing and Pattern Recognition, Nanchang Hangkong University, Nanchang; 330063, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:20
Issue date:July 10, 2022
Publication year:2022
Pages:5944-5950
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">It is essential to quantify the physical properties and the dynamics of flowing particles in many fields, especially in microfluidic-related applications. We propose phase image correlation spectroscopy (PICS) as a versatile tool to quantify the concentration, hydro-diameter, and flow velocity of unlabeled particles by correlating the pixels of the phase images taken on flowing particles in a microfluidic device. Compared with conventional image correlation spectroscopy, PICS is minimally invasive, relatively simple, and more efficient, since it utilizes the intrinsic phase of the particles to provide a contrast instead of fluorescent labeling. We demonstrate the feasibility of PICS by measuring flowing polymethylmethacrylate (PMMA) microspheres and yeast in a microfluidic device. We can envisage that PICS will become an essential inspection tool in biomedicine and industry.<br/></div> © 2022 Optica Publishing Group
Number of references:38
Main heading:Microfluidics
Controlled terms:Flow velocity - Fluidic devices - Image analysis - Strain measurement
Uncontrolled terms:Fluorescent labeling - Image correlation spectroscopy - Inspection tools - Microfluidics devices - Minimally invasive - Phase image - Simple++ - Versatile tools
Classification code:631 Fluid Flow - 632.2 Hydraulic Equipment and Machinery - 632.5.1 Microfluidics - 732.1 Control Equipment - 943.2 Mechanical Variables Measurements
DOI:10.1364/AO.458026
Funding details: Number: 2021-2022, Acronym: -, Sponsor: -;Number: ET202080417, Acronym: -, Sponsor: -;Number: 2019JJ012, Acronym: -, Sponsor: -;Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2021YFF0700303, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QTZX22039, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Key Research and Development Program of China (2021YFF0700303); National Natural Science Foundation of China (62075177, 62105251, 12104354); Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry (2019JJ012); Fundamental Research Funds for the Central Universities (QTZX22039); Exchange Program Between Chinaand Poland (2021-2022); State Key Laboratory of Transient Optics and Photonics; Key Laboratory of Jiangxi Province for Image Processing and Pattern Recognition (ET202080417).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 51>
Accession number:20223212534869
Title:Ultrasensitive fiber-based gas pressure sensor based on harmonic Vernier effect with enhanced contrast
Authors:Luo, Chunhui (1); Chen, Xiaoxu (1); Wu, Shun (1, 2)
Author affiliation:(1) Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan; 430205, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wu, Shun(wushun@wit.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:156
Issue date:December 2022
Publication year:2022
Article number:108532
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We propose and experimentally demonstrate a highly sensitive gas pressure sensor in parallel configuration based on harmonic Vernier effect. The sensor consists of two segments of 75 μm hollow-core capillaries as the sensing and reference Fabry Perot cavity. An open passage is formed by a 5 μm capillary in the sensing cavity while the reference cavity is sealed by a single-mode fiber. A pressure sensitivity of 279.52 pm/kPa is achieved. Our scheme uses "air" instead of "silica" reference cavity, which allows higher sensitivity for a given accuracy of cavity length control. In addition, we also developed a "superposition envelope" method, which improves the contrast by at least 3 dB for the Vernier envelope. This design for high-sensitivity optic fiber gas sensor can be a good candidate for ultrasensitive gas pressure applications.<br/></div> © 2022 Elsevier Ltd
Number of references:28
Main heading:Fabry-Perot interferometers
Controlled terms:Chemical sensors - Gas detectors - Gases - Harmonic analysis - Pressure effects - Pressure sensors - Silica - Single mode fibers
Uncontrolled terms:Enhanced contrast - Fiber-based gas sensor - Gas pressure sensor - Gas-sensors - Harmonic vernier effect - High sensitivity - Microstructures fibers - Parallel configuration - Ultrasensitive - Vernier effect
Classification code:741.1.2 Fiber Optics - 801 Chemistry - 914.1 Accidents and Accident Prevention - 921.6 Numerical Methods - 931.1 Mechanics - 941.3 Optical Instruments - 943.3 Special Purpose Instruments - 944.3 Pressure Measuring Instruments
Numerical data indexing:Decibel 3.00E+00dB, Size 2.7952E-10m, Size 5.00E-06m, Size 7.50E-05m
DOI:10.1016/j.optlastec.2022.108532
Funding details: Number: 22QD01, Acronym: -, Sponsor: -;Number: SKLST202105, Acronym: -, Sponsor: -;
Funding text:This work is supported by grants from Campus Science Foundation of Wuhan Institute of Technology, China [ 22QD01 ], and Open Research Fund of State Key Laboratory of Transient Optics and Photonics [ SKLST202105 ].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 52>
Accession number:20224513074088
Title:Current Application and Progress of Laser Technology in Ophthalmology
Title of translation:激光技术在眼科的应用现状与进展
Authors:Li, Li (1); Zhang, Yue (1); Li, Mengxi (1); Zhang, Zhen (1); Dang, Yufei (1); Yang, Yanlong (2)
Author affiliation:(1) Department of Ophthalmology, The First Affiliated Hospital of Xi' An Jiaotong University, Shaanxi, Xi'an; 710061, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi' An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China
Corresponding author:Yang, Yanlong(yyl@optac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:5
Issue date:March 10, 2022
Publication year:2022
Article number:0507103
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Significance Recently, laser technology has made great progress, particularly its clinical application in ophthalmology, from the diagnosis and treatment to the surgery of various eye diseases. While these wide applications or emerging technologies have shown effective and safe results, there are still difficulties and challenges to overcome. Therefore, it is necessary to review the current application and progress of laser technology in ophthalmology, through which we can get inspired and further advance and optimize laser technology and its application in the diagnosis and treatment of eye diseases. The eye consists of the eyeball and its appendages ( eyelid, orbit, conjunctiva, lacrimal apparatus, and extraocular muscle). The application of laser in ocular appendage is similar to that of laser in dermatology, which produces a transient high temperature and vaporizes the tissue for treatment. Meanwhile, the eyeball, the optical component of the eye, features the application of laser in ophthalmology. The special structure of the eyeball makes it an optimal model for laser technology applications. The eyeball is composed of the ocular wall and the contents inside it. From the outermost part, the ocular wall includes the outer cornea and sclera, the middle uvea, which is rich in its vascular network, and the inner retina, where the photoreceptor cells reside. From front to back, eye contents include aqueous humor, lens, and vitreous body. The cornea, as well as all three eye contents, constitutes the refractive system of the eyeball. The normal visual function of the eye requires a transparent refractive system and a well-functioning chorioretinal vascular system. Therefore, the application of laser technologies is mainly focused on the diagnosis and treatment of two abovementioned components (the refractive and chorioretinal vascular systems), which is also the main topic of this paper. Different laser-tissue interaction mechanisms are exploited in laser-based ophthalmology instruments, including photodisruption, photocoagulation, and photochemical. The application of laser technology in the diagnosis and curative effect monitoring of ocular diseases includes in vivo confocal microscopy, scanning laser ophthalmoscopy, and optical coherence tomography. The application of laser technology for treating eye diseases includes corneal diseases, cataracts, glaucoma, and retinal choroidal diseases. The treatment of corneal diseases mainly includes excimer laser keratectomy, femtosecond laser-assisted in situ keratomileusis, and laser thermokeratoplasty. Cataract is treated using FSL-assisted cataract surgery (FLACS) and Nd: YAG laser posterior capsulotomy. The application of laser in glaucoma is to relieve pupil block between anterior and posterior chambers to increase the function of the trabecular meshwork to drain aqueous humor, thereby improving the entrance of the anterior chamber angle and reducing the outflow resistance. In the applications of treating retinal choroidal diseases, laser thermotherapy (fundus laser photocoagulation and transpupillary thermotherapy) and laser photodynamic therapy (photodynamic therapy) are always exploited. Progress With precision, convenience, remote operation, and low cost as its development trends, the application of laser in ophthalmology has made great progress in the following aspects. Precision means better vision, lower laser-related damage, and more effective biological regulation at the subcellular level with low-level laser therapy. With respect to corneal transplant surgery, the laser helps to achieve more accurate corneal cuts, which contributes to reduced astigmatism and better visual quality. Besides, with the assistance of adaptive optics and wavefront aberration technology, supernormal vision (visual acuity of >2.0) can be achieved in corneal refractive surgery, and low-level laser therapy can improve mitochondrial function and plays a protective role for retinal ganglion and photoreceptor cells, which trigger a series of physiological and biochemical reactions without inducing irreversible damage to the tissue. With respect to glaucoma, several more convenient laser therapies have been developed. MicroPulse® transscleral laser therapy (MicroPulse® TLT) has a wider range of indications and fewer complications compared with traditional transscleral ciliary photocoagulation, which can only be used for advanced refractory glaucoma without functional vision. Simultaneously, noncontact direct selective laser trabeculoplasty (DSLT) has been achieved to enforce the noninvasive, noncontact, and remote-operated treatment of glaucoma. Regarding the application of laser in cataract surgery, much attention is paid to circular curvilinear capsulorhexis, which is the key step in cataract surgery. Precision pulse capsulotomy and selective laser capsulotomy are the two representative techniques, which have better cost-effectiveness than FLACS. Conclusion and Prospect In summary, the application of ophthalmic laser technology covers various diseases of the anterior and posterior segments, from diagnosis to treatment. With the breakthrough of laser technology and increasing ophthalmology clinical demand, laser technology of diagnosis and treatment will be continuously optimized. This paper summarizes the applications of laser technology in the eye, and future challenges of different ophthalmology instruments, hoping to guide the breakthrough point of future technology.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:109
Main heading:Ophthalmology
Controlled terms:Cardiovascular system - Diagnosis - Diseases - Excimer lasers - Laser surgery - Laser tissue interaction - Optical tomography - Tissue
Uncontrolled terms:Application of laser - Laser application in ophthalmology - Laser technique - Laser technologies - Photo thermal effect - Photo-thermal - Photoablation - Photobiomodulation - Photochemical effect - Photodisruption
Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 741.3 Optical Devices and Systems - 744.8 Laser Beam Interactions - 744.9 Laser Applications
DOI:10.3788/CJL202249.0507103
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 53>
Accession number:20214611165911
Title:Intense 2.85 μm mid-infrared emissions in Yb<sup>3+</sup>/Ho<sup>3+</sup> codoped and Yb<sup>3+</sup>/Er<sup>3+</sup>/Ho<sup>3+</sup> tridoped TBLL fluorotellurite glasses and their energy transfer mechanism
Authors:Liu, Chengzhen (1, 2); Feng, Shaohua (1, 2); Xiao, Xusheng (1, 2); Xu, Yantao (1); Guo, Haitao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; Shaanxi; 710119, China; (2) Centre for Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences (UCAS), Beijing; 100049, China
Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:48
Issue:4
Issue date:February 15, 2022
Publication year:2022
Pages:5267-5273
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Yb<sup>3+</sup>/Ho<sup>3+</sup> codoped and Yb<sup>3+</sup>/Er<sup>3+</sup>/Ho<sup>3+</sup> tridoped TeO<inf>2</inf>–BaF<inf>2</inf>–LaF<inf>3</inf>–La<inf>2</inf>O<inf>3</inf> (TBLL) fluorotellurite glasses with low OH<sup>−</sup> absorption (0.026 cm<sup>-1</sup>), high glass transition temperature (434 °C) and low phonon energy (784 cm<sup>-1</sup>) were prepared. Their mid-infrared fluorescence properties and related energy transfer (ET) mechanism were studied under 980 nm excitation. A strong emission at 2.85 μm was realized in Yb<sup>3+</sup>/Ho<sup>3+</sup> codoped tellurite glass, which was attributed to the high-efficiency ET from Yb<sup>3+</sup> ions to Ho<sup>3+</sup>, and the ET efficiency was 91.1%. Further introduction of Er<sup>3+</sup> ions induced stronger 2.85 μm emission, and the ET efficiency was improved to 96.2%, ascribed to the establishment of more ET channels and Er<sup>3+</sup> ions playing the role of ET bridge between Yb<sup>3+</sup> and Ho<sup>3+</sup> ions. These results indicate that the Yb<sup>3+</sup>/Er<sup>3+</sup>/Ho<sup>3+</sup> tridoped tellurite glass could be a hopeful gain medium material for the ∼3 μm fiber laser.<br/></div> © 2021
Number of references:34
Main heading:Energy transfer
Controlled terms:Tellurium compounds - Fiber lasers - Rare earths - Barium compounds - Glass - Glass transition - Metal ions - Infrared devices
Uncontrolled terms:Co-doped - Energy transfer efficiency - Energy transfer mechanisms - Energy-transfer - Fluoro-tellurite glass - Mid-infrared emission - Midinfrared - OH- absorption - Rare earth ions - Tellurite glass
Classification code:531.1 Metallurgy - 744.4 Solid State Lasers - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 812.3 Glass
Numerical data indexing:Percentage 9.11E+01%, Percentage 9.62E+01%, Size 2.60E-04m, Size 2.85E-06m, Size 3.00E-06m, Size 7.84E+00m, Size 9.80E-07m, Temperature 7.07E+02K
DOI:10.1016/j.ceramint.2021.11.068
Funding details: Number: JCTD-2018–19, Acronym: -, Sponsor: -;Number: 61935006,62005312,62090065, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018M633603, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: WUT, Sponsor: Wuhan University of Technology;Number: IOSKL2020KF11, Acronym: SKLIOE, Sponsor: State Key Laboratory on Integrated Optoelectronics;
Funding text:Authors thank Pro. Chao Liu and Mr. Kai Li (Wuhan University of Technology, China) for his help with the decay curve measurements. This work was supported by the National Natural Science Foundation of China (Grants Nos. 62090065, 61935006 and 62005312), the CAS Interdisciplinary Innovation Team project (JCTD-2018–19), the China Postdoctoral Science Foundation (Grant No. 2018M633603) and the Open Fund of the State Key Laboratory of Integrated Optoelectronics (IOSKL2020KF11).Authors thank Pro. Chao Liu and Mr. Kai Li (Wuhan University of Technology, China) for his help with the decay curve measurements. This work was supported by the National Natural Science Foundation of China (Grants Nos. 62090065 , 61935006 and 62005312 ), the CAS Interdisciplinary Innovation Team project (JCTD-2018–19), the China Postdoctoral Science Foundation (Grant No. 2018M633603 ) and the Open Fund of the State Key Laboratory of Integrated Optoelectronics ( IOSKL2020KF11 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 54>
Accession number:20224212979883
Title:Modulator-Free Variable Multi-Rate FSO Communication 1 km Outfield Demonstration Based on Chirp-Managed Laser (Open Access)
Authors:Xie, Zhuang (1, 2); Jia, Shuaiwei (1, 2); Shao, Wen (1, 2); Wang, Yang (1, 2); Ma, Rong (1); Wei, Sentao (1); Liao, Peixuan (1, 3); Zhang, Dongquan (1); Wang, Weiqiang (1); Gao, Duorui (1, 3); Wang, Wei (1); Xie, Xiaoping (1, 2)
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, School of Future Technology, Beijing; 100049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Gao, Duorui(gaoduorui@opt.ac.cn); Xie, Xiaoping(xxp@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:6
Issue date:December 1, 2022
Publication year:2022
Article number:7956706
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Due to the high energy efficiency per bit and high sensitivity, Return-to-zero differential-phase-shift-keying (RZ-DPSK) is perfectly suitable for free-space laser communications. However, the conventional generation method of RZ-DPSK optical signal requires two modulators, which is costly, bulky, and heavy, significantly hindering the application of RZ-DPSK in size, weight, and power (SWaP)-constrained satellite platforms. In this paper, we propose and experimentally demonstrate a modulator-free variable multi-rate RZ-DPSK free-space optical (FSO) communication system based on chirp-managed laser (CML). Based on the proposed scheme, an FSO outfield experiment over 1 km has been successfully undertaken, achieving receiving sensitivities of-48.9 dBm and-45.6 dBm at 2.5 Gbps and 5 Gbps, with bit error rate (BER) of 1 × 10-3 without forward error correction (FEC), respectively. The performance of the proposed system is also investigated by studying the eye diagrams under two different test conditions of back-to-back transmission and 1-km free space transmission. In addition to the small size, lightweight and low cost, the proposed scheme shows great potential for a variety of FSO communication applications ranging from Cube-Star to larger satellite laser communication platforms.<br/></div> © 2009-2012 IEEE.
Number of references:21
Main heading:Light modulation
Controlled terms:Bandpass filters - Bit error rate - Chirp modulation - Energy efficiency - Error correction - Light modulators - Optical communication - Optical filters - Optical links - Optical signal processing - Optical transmitters
Uncontrolled terms:Chirp - Chirp managed lasers - Free Space Optical communication - Free variable - Miniaturisation - Modulator-free - Multi rate - Optical interferometry - Return-to-zero differential phase-shift keying - Variable multi-rate
Classification code:525.2 Energy Conservation - 703.2 Electric Filters - 716 Telecommunication; Radar, Radio and Television - 717.1 Optical Communication Systems - 717.2 Optical Communication Equipment - 723.1 Computer Programming - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Bit rate 2.50E+09bit/s, Bit rate 5.00E+09bit/s, Decibel milliwatts -4.56E+01dBm, Decibel milliwatts -4.89E+01dBm, Size 1.00E+03m
DOI:10.1109/JPHOT.2022.3211268
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 55>
Accession number:20220111414607
Title:Polydopamine functionalized graphene oxide for high sensitivity micro-tapered long period fiber grating sensor and its application in detection Co<sup>2+</sup> ions
Authors:Kang, Xin (1); Wang, Ruiduo (2); Jiang, Man (1); Li, Erkang (1); Li, Yarong (1); Yan, Xiaoxin (1); Wang, Tianqi (1); Ren, Zhaoyu (1)
Author affiliation:(1) State Key Laboratory of Photon-Technology in Western China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics & Photon Technology, Northwest University, Xi'an; 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Ruiduo(wangruiduo@opt.ac.cn)
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:68
Issue date:January 2022
Publication year:2022
Article number:102807
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We report a highly sensitive label-free chemical sensor for the detection of heavy metal ions. The sensor was derived from a micro-tapered long-period fiber grating (MTLPFG) functionalized by graphene oxide and poly-dopamine modified graphene oxide, respectively. Because of the combination of chemical bonding and optical tweezer effect, the materials were deposited on the MTLPFG fiber grating surface. The morphology and elemental composition of the nanocomposites were characterized by scanning electron microscope, Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). Herein, we demonstrate a high sensitivity MTLPFG detection of cobalt ions in a large concentration range from 1 ppb to 10<sup>7</sup> ppb. The highest sensitivity of 2.4 × 10<sup>−3</sup> dB∙ppb<sup>−1</sup> at the PDA concentrations of 0.05 g∙L<sup>−1</sup> was obtained by MTLPFG functionalized with PDA-GO (PDA-GO-MTLPFG). The result was significantly higher than GO-deposited MTLPFG (GO-MTLPFG). The proposed PDA-GO-MTLPFG demonstrates superior application value in chemical sensing fields.<br/></div> © 2021 Elsevier Inc.
Number of references:43
Main heading:Graphene
Controlled terms:X ray photoelectron spectroscopy - Metal ions - Morphology - Scanning electron microscopy - Fourier transform infrared spectroscopy - Heavy metals - Amines - Chemical detection - Electrochemical sensors - Fibers - Chemical bonds - Diffraction gratings
Uncontrolled terms:2d material - Fiber grating sensor - Functionalized - High sensitivity - ITS applications - Label free - Long-period fibre gratings - PDA-graphene oxide - Polydopamine - Sensor applications
Classification code:531 Metallurgy and Metallography - 531.1 Metallurgy - 732.2 Control Instrumentation - 741.3 Optical Devices and Systems - 761 Nanotechnology - 801 Chemistry - 801.4 Physical Chemistry - 801.4.1 Electrochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Numerical data indexing:Decibel 2.40E-03dB, Mass 5.00E-05kg
DOI:10.1016/j.yofte.2021.102807
Funding details: Number: 2014DFR10780,61505162,61905193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JM316, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work is supported by Natural Science Basic Research Plan in Shaanxi Province of China (No. 2021JM316), National Science Foundation of China (Nos. 61505162 and 61905193), and International Cooperative Program (Grant No. 2014DFR10780).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 56>
Accession number:20221211818051
Title:Observation of Primary and Secondary Enhancement of Emission Spectra From Spatially Confined Laser-Induced Aluminum Plasmas (Open Access)
Authors:Xu, Boping (1, 2); Lei, Bingying (1, 2); Wang, Jing (1, 2); Liu, Yinghua (1, 2); Xing, Yufei (3); Xie, Xiaotao (3); Zhang, Wenfu (1); Tang, Jie (1); Wang, Yishan (1); Zhao, Wei (1); Duan, Yixiang (1, 4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese, Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (4) Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, Northwest University, Xi'an; 710127, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:2
Issue date:April 1, 2022
Publication year:2022
Article number:5720508
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, four cylindrical cavities with diameters of more than 10 mm are utilized to confine aluminum plasmas to improve the signal intensities of laser-induced breakdown spectroscopy (LIBS). Primary and secondary enhancements of spectra are observed. This phenomenon is attributed to the fact that plasmas are compressed into a smaller core area with denser population of excited atoms by reflected shockwaves more than one time. The delay time for both primary and secondary signal enhancements is postponed with decreasing the laser energy or increasing the cavity diameter. Relative standard deviations (RSDs) of spectra signal in different experimental conditions are discussed to illustrate the uncertainties of measurement. In addition, enhancement factor, signal-to-background ratio (SBR) and signal-to-noise ratio (SNR) are also examined in the two cases. The fast images of plasma plume further prove the enhancements of emission intensity, as well as its RSD.<br/></div> © 2009-2012 IEEE.
Number of references:36
Main heading:Laser induced breakdown spectroscopy
Controlled terms:Atomic emission spectroscopy - Uncertainty analysis - Signal to noise ratio - Image enhancement - Laser produced plasmas
Uncontrolled terms:Aluminium plasmas - Cylindrical cavities - Emission spectrums - Laser induced - Optical surface waves - Primary and secondary enhancement - Relative standards deviations - Sensitivity - Spatial confinement - Surface-emitting laser
Classification code:716.1 Information Theory and Signal Processing - 744.9 Laser Applications - 922.1 Probability Theory - 931.1 Mechanics - 932.3 Plasma Physics
Numerical data indexing:Size 1.00E-02m
DOI:10.1109/JPHOT.2022.3159720
Funding details: Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JM- 309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2011YQ030113, Acronym: -, Sponsor: National Key Scientific Instrument and Equipment Development Projects of China;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Thisworkwas supported in part by the National Major Scientific Instruments and Equipment Development Special Funds underGrant 2011YQ030113, in part by theNational Natural Science Foundation of China under Grant 51877210, in part by the Natural Science Foundation of Shaanxi Province, China, under Grant 2020JM- 309, in part by the Open Research Fund of Key Laboratory of Spectral Imaging Technology, CAS, under Grant LSIT201807G, in part by the Natural Science Basic Research Program of Shaanxi under Grant 2019JCW-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 57>
Accession number:20220711630605
Title:Human action recognition by multiple spatial clues network
Authors:Zheng, Xiangtao (1); Gong, Tengfei (1); Lu, Xiaoqiang (1); Li, Xuelong (2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an, Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) The School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xian; 710072, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:483
Issue date:April 28, 2022
Publication year:2022
Pages:10-21
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Human action can be recognized in still images since the whole image represents an action with some spatial clues, such as human poses, action-specific parts, and global surroundings. To represent the spatial clues, the recent methods require labor-intensive annotations to locate the human body and objects, which are computationally intensive. To eliminate strong supervision, a Multiple Spatial Clues Network (MSCNet) is proposed to represent the spatial clues with only image-level action label. Neither accurately manual annotated bounding boxes nor extra labeled datasets are required as additional supervision. First, the proposed MSCNet exploits spatial-attention module to generate spatial attention regions, and detects the spatial clues with minimal supervision. Then, spatial clues exploitation is proposed to utilize the learned spatial clues with three modules: the context module, body + context module and body + semantics module. Experiments on three benchmark datasets demonstrate the effectiveness of the proposed MSCNet.<br/></div> © 2022 Elsevier B.V.
Number of references:49
Main heading:Semantics
Controlled terms:Deep learning
Uncontrolled terms:Attention module - Deep learning - Human actions - Human bodies - Human pose - Human-action recognition - Labour-intensive - Spatial attention - Still-images - Weakly supervised learning
Classification code:461.4 Ergonomics and Human Factors Engineering
DOI:10.1016/j.neucom.2022.01.091
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDY-SSW-JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03, in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences under Grant QYZDY-SSW-JSC044.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 58>
Accession number:20223812763830
Title:Comparative study on the copper plasma confined with upward and downward conical cavities in laser-induced breakdown spectroscopy
Authors:Xu, Boping (1, 2); Liu, Yinghua (1, 2); Lei, Bingying (1, 2); Wang, Jing (1, 2); Zhang, Wenfu (1, 2); Wang, Yishan (1); Zhao, Wei (1); Duan, Yixiang (3); Tang, Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China; (3) Research Center of Analytical Instrumentation, School of Mechanical Engineering, Sichuan University, Chengdu; 610064, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Spectrochimica Acta - Part B Atomic Spectroscopy
Abbreviated source title:Spectrochim. Acta Part B At. Spectrosc.
Volume:197
Issue date:November 2022
Publication year:2022
Article number:106528
Language:English
ISSN:05848547
CODEN:SAASBH
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, the confinement effects of upward and downward conical cavities on laser-induced copper plasma were investigated by optical emission spectroscopy and fast imaging technique. It follows from the time-integrated spectra, the time-resolved spectra, and the spatial distributions of spectral intensity that the superior enhancement effects on spectral intensity are obtained in the upward conical cavity. Compared to the plasmas without confinement, plasma temperature and electron number density are increased in the presence of upward conical cavity, while no enhancements are obtained in the downward conical cavity. Reflection model of shockwave in a conical cavity is established to interpret these phenomena. The enhancement of the plasma plume confined in the upward conical cavity results from the compression of the plume towards its central region by the shockwave, as well as the accelerated collisions between the particles therein. No enhancement effect of the plasma in the downward conical cavity is obtained because of the radial expansion of plasma plume and the population reduction of excited species in the plasma primary core due to the pressure of oblique downward shockwave. This shockwave reflection model is further verified by the fast imaging, where the direct observation of the plasma plume agrees well with the enhancement effects of the two cavities on the spectral intensity.<br/></div> © 2022 Elsevier B.V.
Number of references:35
Main heading:Copper
Controlled terms:Optical emission spectroscopy - Thermal plumes
Uncontrolled terms:Comparatives studies - Conical cavity - Enhancement effects - Fast imaging - Laserinduced breakdown spectroscopy (LIBS) - Plasmas plumes - Reflection Models - Shockwave - Spatially confined LIBS - Spectral intensity
Classification code:544.1 Copper - 941.4 Optical Variables Measurements
DOI:10.1016/j.sab.2022.106528
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the Natural Science Foundation of Shaanxi Province , China (Grant No. 2020JM-309 ), the National Natural Science Foundation of China (Grant Nos. 51877210 , 52177166 ), the Open Research Fund of Key Laboratory of Spectral Imaging Technology, CAS (Grant No. LSIT201807G ), the Natural Science Basic Research Program of Shaanxi (Grant No. 2019JCW-03 ), the Key Deployment Research Program of XIOPM (Grant No. S19-020-III ), and the Major Science and Technology Infrastructure Pre-research Program of the CAS (Grant No. J20-021-III ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 59>
Accession number:20222912362200
Title:Triple-wavelength quantitative phase imaging with refractive index measurement
Authors:Song, Jinwei (1, 2); Min, Junwei (1, 3); Yuan, Xun (1, 2); Xue, Yuge (1, 2); Bai, Chen (1); Yao, Baoli (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266200, China
Corresponding author:Min, Junwei(mjw@opt.ac.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:156
Issue date:September 2022
Publication year:2022
Article number:107110
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">A method to quantitatively measure the refractive index (RI) and the topography of transparent samples is proposed. Three quantitative phase images at different wavelengths are firstly obtained by using a quadriwave lateral shearing interferometry (QLSI) technique, and then the RIs at the three wavelengths and the physical thickness distribution of the sample are independently calculated with the help of Cauchy's dispersion formula. Neither the highly dispersive medium nor the manual operation of changing the surrounding medium is required. From the measured RIs, the composition of the sample can be identified besides the topography of the sample. Both simulation and experimental results verified the effectiveness and feasibility of the proposed method.<br/></div> © 2022
Number of references:33
Main heading:Topography
Controlled terms:Dispersion (waves) - Refractive index
Uncontrolled terms:Interferometry technique - Lateral shearing interferometry - Material identification - Phase image - Physical thickness - Quantitative phase imaging - Refractive index measurement - Thickness distributions - Three-wavelengths - Triple wavelengths
Classification code:741.1 Light/Optics - 951 Materials Science
DOI:10.1016/j.optlaseng.2022.107110
Funding details: Number: 2018YFE0128300,61,975,233, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: CAS 2,019,393, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;Number: 2020GY-008, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:Natural Science Foundation of China (NSFC) (61,975,233); Chinese-Egyptian Joint Innovative and Technological Research Project 2018YFE0128300; Youth Innovation Promotion Association , CAS 2,019,393 ; Key Research and Development Program of Shaanxi Province (2020GY-008).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 60>
Accession number:20224513060396
Title:Non-invasive Sleep-Wake Discrimination Using LS-CPC Algorithm Based on MZI-BCG Sensor
Authors:Feng, Yifei (1); Xu, Wei (2); He, Ying (1); Ge, Qinggang (3); Yang, Yilong (1)
Author affiliation:(1) Naval Specialty Medical Center, Department of Marine Biomedicine and Polar Medicine, Shanghai; 200433, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Peking University Third Hospital, Beijing; 100191, China
Corresponding author:He, Ying(yinghe_hys@163.com)
Source title:ICOCN 2022 - 20th International Conference on Optical Communications and Networks
Abbreviated source title:ICOCN - Int. Conf. Opt. Commun. Networks
Part number:1 of 1
Issue title:ICOCN 2022 - 20th International Conference on Optical Communications and Networks
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665458986
Document type:Conference article (CA)
Conference name:20th International Conference on Optical Communications and Networks, ICOCN 2022
Conference date:August 12, 2022 - August 15, 2022
Conference location:Shenzhen, China
Conference code:183381
Sponsor:et al.; Light Science and Applications; LUSTER; Mikrouna; OYSL Photonics; Red Star Yang Technology
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A non-invasive sleep-wake discrimination algorithm based on Mach-Zehnder interferometer (MZI) assisted ballistocardiogram (BCG) sensor is proposed. According to the Lomb-Scargle (LS) periodogram and cardiopulmonary coupling (CPC) algorithm using heart rate variability and respiratory signal, the sleep-wake status could be successfully classified.<br/></div> © 2022 IEEE.
Number of references:6
Main heading:Wakes
Controlled terms:Sleep research
Uncontrolled terms:Classifieds - Coupling algorithms - Discrimination algorithms - Heart rate variability signals - Lomb-scargle periodogram - Mach-zehnde interferometer-BeG sensor - Non-invasive - Respiratory signals - Sleep-wake discrimination - Sleep/wake
Classification code:461.4 Ergonomics and Human Factors Engineering - 631.1 Fluid Flow, General
DOI:10.1109/ICOCN55511.2022.9901061
Funding details: Number: BHJ20C008, Acronym: -, Sponsor: -;
Funding text:This work was supported by the Army Logistics Research Project （ BHJ20C008 ）.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 61>
Accession number:20220911731376
Title:Generation of separation-locked bound solitons in a passively mode-locked all-fiber laser with a Fabry-Perot microcavity
Authors:Li, Wenlei (1, 2); Li, Xiaoliang (1); Geng, Gaoli (1); Lin, Ruping (1); Chen, Guangwei (3); Wang, Guomei (4); Zeng, Chao (5); Wang, Xinliang (1)
Author affiliation:(1) School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo; 454000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Beijing Information Science and Technology University, Beijing; 100192, China; (4) Shandong University of Technology, Shandong; 255000, China; (5) Northwestern Polytechnical University, Xi'an; 710129, China
Corresponding author:Li, Wenlei(liwenlei@hpu.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:150
Issue date:June 2022
Publication year:2022
Article number:107936
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We report the generation of separation-locked bound solitons in a passively mode-locked all-fiber laser with a Fabry-Perot (F-P) microcavity. The laser cavity can deliver several kinds of bound solitons with the fixed soliton separation of 4.7 ps, corresponding to the F-P cavity length of 700 μm. The single-shot spectra capturing technique reveals that the observed bound soliton is directly generated from continuous wave without experiencing single-soliton mode-locking process. The numerical results are in good agreement with the experimental observations and further confirm that the generation of bound solitons with locked separation is attributed to the F-P microcavity. The demonstration provides a versatile method to generate several types of separation-locked bound solitons by using F-P microcavity with diverse cavity lengths and reflectivities, which play vital roles in fiber sensor and optical information storage.<br/></div> © 2022 Elsevier Ltd
Number of references:46
Main heading:Fiber lasers
Controlled terms:Fabry-Perot interferometers - Microcavities - Solitons - Separation - Fibers - Passive mode locking
Uncontrolled terms:All-fiber lasers - Bound soliton - Continuous Wave - Fabry-Perot microcavities - Modelocking - Passively mode-locked - Single soliton - Single-shot - Soliton separation - Spectra's
Classification code:714 Electronic Components and Tubes - 744.1 Lasers, General - 744.4 Solid State Lasers - 802.3 Chemical Operations - 941.3 Optical Instruments
Numerical data indexing:Size 7.00E-04m, Time 4.70E-12s
DOI:10.1016/j.optlastec.2022.107936
Funding details: Number: 2019GGJS060, Acronym: -, Sponsor: -;Number: B2020-46, Acronym: HPU, Sponsor: Henan Polytechnic University;Number: 182102210309, Acronym: -, Sponsor: Henan Provincial Science and Technology Research Project;
Funding text:This work was supported by the Doctoral foundation of Henan Polytechnic University (Grant No. B2020-46 ), the Training plan of young backbone teachers in Colleges and Universities of Henan Province (Grant No. 2019GGJS060 ), and the Henan Scientific and Technological Research Project (Grant No. 182102210309 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 62>
Accession number:20224713144708
Title:Influence of initial tunneling step on the return energy of high-order harmonic generation
Authors:Gao, Xu-Zhen (1, 2, 3); Landsman, Alexandra S. (4); Cao, Huabao (1, 3); Zhang, Yanpeng (2); Wang, Yishan (1, 3); Fu, Yuxi (1, 3); Pi, Liang-Wen (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, The Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory for Physical Electronics and Devices, The Ministry of Education, Shaanxi Key Lab of Information Photonic Technique, Xi'An JiaoTong University, Xi'an; 710049, China; (3) University of Chinese Academy of Science, Beijing; 100049, China; (4) Department of Physics, The Ohio State University, Columbus; OH; 43210, United States
Source title:Physical Review A
Abbreviated source title:Phys. Rev. A
Volume:106
Issue:5
Issue date:November 2022
Publication year:2022
Article number:053105
Language:English
ISSN:24699926
E-ISSN:24699934
Document type:Journal article (JA)
Publisher:American Physical Society
Abstract:<div data-language="eng" data-ev-field="abstract">To investigate high-order harmonic generation in a monochromatic laser field, we derive an analytical expression for the return energy of an electron as a function of the time interval between ionization and return. We then expand the expression for kinetic energy to second order with respect to the Keldysh parameter γ. In this expansion, the zero-order term is the return energy in the simple man model and the second-order term corresponds to corrections to this model. The origin of this additional kinetic energy is frequently attributed to the nonzero exit of the initial tunneling step. Here, we show that this commonly used picture is incomplete. We present a framework to fully understand the additional kinetic energy as resulting from additive contributions of zero-order and second-order velocities. Our results show that the nonzero velocity of the initial tunneling step has a quantifiable effect on the cutoff energy measured in high harmonic generation (HHG). This opens the door to experimentally addressing the question of the initial electron velocity at the tunnel exit, with important implications for the correct calibration of the attoclock, as well as our interpretation of the strong field-ionization process more broadly.<br/></div> © 2022 American Physical Society.
Number of references:41
Main heading:Kinetic energy
Controlled terms:Harmonic analysis - Harmonic generation - Ionization - Kinetics
Uncontrolled terms:Analytical expressions - Energy - High order harmonics generation - Keldysh parameter - Laser fields - Monochromatic lasers - Second orders - Simple++ - Time interval - Zero order
Classification code:631.1 Fluid Flow, General - 802.2 Chemical Reactions - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity
DOI:10.1103/PhysRevA.106.053105
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: 2208040, Acronym: NSF, Sponsor: National Science Foundation;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2019JCW-03,2021ZY-JC-01, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research is supported, in part, by the Major Science and Technology Infrastructure Pre-research Program of the CAS (Grant No. J20-021-III), Key Deployment Research Program of XIOPM (Grant No. S19-020-III), Attosecond Science and Technology Innovation Team of Shaanxi, Natural Science Basic Research Program of Shaanxi (Grants No. 2019JCW-03 and No. 2021ZY-JC-01), National Natural Science Foundation of China (Grant No. 61690222). ASL acknowledges support from the NSF Investigator-Initiated Research grant, Award ID 2208040.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 63>
Accession number:20221211825987
Title:Research Progress in Chalcogenide Glass Fibers for Infrared Laser Delivery
Title of translation:用于红外激光传输的硫系玻璃光纤研究进展
Authors:Zhang, Hao (1, 2); Guo, Haitao (1); Xu, Yantao (1, 2); Li, Man (3); Ma, Wenchao (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100045, China; (3) Science and Technology on Electro-Optical Information Security Control Laboratory, Tianjin; 300308, China
Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:1
Issue date:January 10, 2022
Publication year:2022
Article number:0101007
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Significance: As the performance of mid-infrared lasers continues to improve, there occurs an increasing demand for their applications in laser surgery, military, materials processing, and other fields. Compared with spatial optical systems, the use of infrared fibers for laser transmission can greatly reduce the size of an optical system and improve the compactness and reliability of the whole system. For example, in the medical field, a considerable amount of laser surgery is performed using 2.94 μm Er: YAG lasers. The Er: YAG laser radiation absorption is very strong because this laser wavelength is practically in the center of the maximum absorption band of cellular water. Since biological tissues contain up to 70%~90% water, the Er: YAG laser is extremely efficient for their high precision cutting and vaporization. In addition, in the military field, another important application for 2 μm to 5 μm short-wave mid-infrared lasers is infrared countermeasures (IRCM) or laser tactical systems. Transmitting high power infrared lasers by infrared fibers can deflect or dazzle the infrared target seeking system. This application puts a high demand on the power handling capability of the fiber (typically tens of watts). For 512 μm long-wave mid-infrared lasers, high power CO (5.4 μm) and CO<inf>2</inf> (10.6 μm) lasers can be used for laser surgery, industrial cutting, and welding applications. In addition, the transmission of laser power through optical fibers enables remote operation. Due to the characteristics of wide infrared transmission, good physical and chemical stabilities, and easily fiberized performances, chalcogenide glass is one of the best materials for infrared laser power delivery fiber. Therefore, as an important infrared fiber, the fabrication and application of chalcogenide glass fiber have been paid much attention at home and abroad. This review introduces the research progresses of domestic and foreign research groups in the preparation and application of chalcogenide fibers (including the step-index fibers and micro-structured fibers) for infrared laser power delivery. Progress: Step-index chalcogenide glass fibers are the earliest and most mature chalcogenide fibers. For 25 μm short-wave mid-infrared lasers, researchers first studied chalcogenide multi-mode fibers. In 1998, the US Naval Laboratory reported the successful transmission of a 2.94 μm wavelength medical free electron laser (MFEL) using an As<inf>40</inf>S<inf>60</inf> multi-mode fiber. This result showed that laser surgery should be possible using a chalcogenide multi-mode fiber. Both CW and pulsed laser transmissions through chalcogenide multi-mode fibers were then subsequently reported. With the continuous development of mid-infrared lasers, while large-core multi-mode fibers can transmit higher power lasers, laser transmission quality and transmission modes still had to be considered, which require the development of small-core single-mode fibers. In 2018, the University of Central Florida examined the potential of chalcogenide fibers to handle high power mid-infrared lasers. The AR-coated As<inf>40</inf>S<inf>60</inf> single-mode fiber enables the delivery of 10.3 W laser at 2.053 μm (Fig. 1). For 512 μm long-wave mid-infrared lasers, a multi-hundred-watt CO laser has been successfully delivered through chalcogenide glass fibers under gas cooling conditions (Fig. 2). And Te-based chalcogenide fibers can deliver a CO<inf>2</inf> laser with tens of watts. The laser transmission of different chalcogenide step-index fibers has been summarized (Tabled 1). It can be seen that chalcogenide step-index fibers have made a great progress in mid-infrared laser transmission. At present, a multi-mode step-index fiber can achieve multi-hundred-watt laser transmission, while a single-mode step-index fiber can basically meet the demand for laser transmission within 10 W, and has been experimentally demonstrated in the fields of laser surgery and laser processing. Although a great progress has been made in chalcogenide step-index fibers, traditional step-index fibers are incapable due to material limitations with the increase in transmission power. In order to achieve a high power laser delivery, increasing the mode field area is the most direct and effective solution, and at the same time to ensure the beam quality, the transmission in fibers is required to be single-mode. A hollow-core micro-structured optical fiber (HC-MOF) and a large-mode-area photonic crystal fiber (LMA PCF) have become effective approaches to enhance the capability of power handling of chalcogenide fibers. Hollow-core micro-structured fibers can be divided into hollow-core Bragg fibers, hollow-core photonic crystal fibers (HC-PCFs) and hollow-core anti-resonant fibers (HC-ARFs). As researchers continue to study the numerical simulation and fabrication of micro-structured optical fibers, HC-ARFs have become the most promising infrared fibers for a high power laser delivery. The development of HC-ARFs is an encouraging advance in the fiber technology which combines the low theoretical loss over a wide bandwidth with a high tolerance to fabrication imperfections. A tolerance to fabrication imperfection is particularly important for chalcogenide fibers. At present, the minimum loss of HC-ARFs is 2.1 dB/m at 10 μm. This result indicates that HC-ARFs have already some practical value. Conclusions and Prospects: Chalcogenide fibers have been used in laser processing, laser surgery, and homeland security. The development of chalcogenide fibers with low loss and high laser damage threshold has great scientific value and application prospects. In particular, hollow-core micro-structured fibers are a technological race for the next generation of infrared fibers and related applications.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:41
Main heading:Infrared lasers
Controlled terms:Optical systems - Yttrium aluminum garnet - Chalcogenides - Water absorption - Optical fibers - Laser ablation - Laser materials processing - Laser surgery - Light transmission - Infrared devices - Military applications - Electric power transmission
Uncontrolled terms:Chalcogenide fibers - Chalcogenide glass - Infrared fibers - Infrared-laser - Laser delivery - Laser transmission - Midinfrared - Negative curvature - Negative curvature fiber - Step-index fibers
Classification code:404.1 Military Engineering - 461.6 Medicine and Pharmacology - 641.2 Heat Transfer - 706.1.1 Electric Power Transmission - 741.1 Light/Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 802.3 Chemical Operations - 804.2 Inorganic Compounds
Numerical data indexing:Decibel 2.10E+00dB, Electrical conductance 4.00E+01S, Percentage 7.00E+01%, Percentage 9.00E+01%, Power 1.00E+01W, Power 1.03E+01W, Size 1.00E-05m, Size 1.06E-05m, Size 2.00E-06m to 5.00E-06m, Size 2.053E-06m, Size 2.50E-05m, Size 2.94E-06m, Size 5.12E-04m, Size 5.40E-06m
DOI:10.3788/CJL202249.0101007
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 64>
Accession number:20221211832063
Title:Corrigendum to "High sensitivity FBG humidity sensor coated with graphene and polyimide films" [Opt. Fiber Technol. 66 (2021) 102635] (Optical Fiber Technology (2021) 66, (S106852002100184X), (10.1016/j.yofte.2021.102635))
Authors:Li, Ziwan (1, 2); Dong, Bo (3); Chen, Enqing (1, 2); Li, Yang (1, 2); Zhao, Wei (1, 2); Wang, Yishan (1, 2); Gao, Cunxiao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of New Materials and New Energy, Shenzhen Technology University, Shenzhen; 518118, China
Corresponding author:Dong, Bo(dongbo@sztu.edu.cn)
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:70
Issue date:May 2022
Publication year:2022
Article number:102877
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Erratum (ER)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We aimed to explore the effect of graphene films on polyimide-based humidity sensors in our published articles [1]. The results show that its sensitivity is 1.80 times that of the sensor coated with only polyimide film. After a lot of experiments in the later period, we believe that thicker polyimide film can lead to bigger wet hysteresis, which leads to measurement errors of this kind of sensor. We continue to explore the mechanism of action of graphene films by coating thinner polyimide films while keeping the graphene concentration consistent, and we found that the graphene film can effectively reduce the wet hysteresis effect and have a good measurement repeatability, as shown in Fig. 10(a) and (b) and its sensitivity are 1.53 and 1.61 times that of the sensor coated with thinner polyimide film when RH increases and decreases after coating the graphene film. The repeatability of the sensor is also good, Fig. 10(c) and (d) shows the repeatability test when only the polyimide film was coated and after coating the graphene film. We sincerely apologize to the editorial office and all readers. No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously, and not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed.<br/></div> © 2021 Elsevier Inc.
Number of references:1
DOI:10.1016/j.yofte.2022.102877
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.ErratuFlg:2013580198
<RECORD 65>
Accession number:20223912795058
Title:High Power Single Crystal Fiber Ultrashort Pulse Amplification Technology （Invited）
Title of translation:高功率单晶光纤超短脉冲放大技术研究进展（特邀）
Authors:Cao, Xue (1, 2, 3, 4); Li, Feng (1); Zhao, Hualong (1); Wang, Yishan (1); Zhou, Wei (4); Shen, Deyuan (4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Shaanxi Provincial Key Laboratory of Information Photonics Technology, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Jiangsu Key Laboratory of Advanced Laser Materials and Devices, College of Physics and Electronic Engineering, Jiangsu Normal University, Jiangsu, Xuzhou; 221116, China
Corresponding authors:Li, Feng; Wang, Yishan
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:8
Issue date:August 2022
Publication year:2022
Article number:0851513
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Femtosecond laser with high repetition rate and high output power can be used as the driving light source of attosecond pulse generation， which can effectively increase photon flux， obtain enough experimental data quickly， and overcome the existing problem of space charge effect. Therefore， it has important application value in high order harmonics and attosecond pulse generation. At the same time， high repetition rate and high output power femtosecond pulses also have important application prospects in ultrafast laser precision micro-machining field， which can solve the technical problems of hard， brittle and soft materials processing with high-precision and high-quality "cold machining" in aviation and aerospace field. With the rapid development of ultra-fast laser processing market， high power femtosecond laser system with higher cost performance has become the major factor of concern in the industry. Compared with traditional solid-state lasers， fiber amplifiers have many characteristics， such as easy operation， all-fiber fusion， easy integration， excellent heat dissipation performance， excellent beam quality， etc.， which have attracted much attention in the field of ultra-short pulse amplification. However， limited by the mode field area of ordinary single-mode or nearly single-mode fiber， the output energy of the ultrashort pulse based on the structure of optical fiber amplifier system is limited due to the Raman scattering and stimulated brillouin scattering， the self-phase modulation， cross phase modulation and other nonlinear effect in the process of high power pulse amplification. In order to achieve high energy femtosecond pulse amplification， the current fiber amplification system mainly adopts the structure of CPA system. Before amplification， the pulse is stretched in the time domain and the special fiber with large mode area is used to achieve high energy output in the space domain. Slab， disc and other solid amplifying media can output higher pulse energy，however，they are difficult to package， and the amplification structure is relatively complex， which is not conducive to the mass production of domestic lasers. Single crystal fiber as a new type of amplifier gain medium， it has a slender crystal structure and waveguide transmission characteristics for pump beam， which makes it have the advantages of both crystal and fiber laser amplification media. Its slender crystal structure can effectively dissipate heat， ensuring high beam quality under high-power operation. The waveguide characteristics of pump beam make it have greater energy extraction efficiency and higher amplification gain than traditional crystal rods. Compared with the fiber amplifier， the nonlinear accumulation of the single crystal fiber amplifier is much smaller， which is more conducive to the improvement of pulse energy. Meanwhile， the amplification structure of the single-crystal fiber amplifier mainly focuses on the single-pass or double-pass traveling wave amplification structure. Compared with the high complexity of the slab and thin-disk amplification system， the single-crystal fiber has better integration and stability. The waveguide structure of single-crystal fiber amplifier can match the multi-mode pump beam with the signal beam propagating in free space， which can obtain higher amplification efficiency and better beam quality than the traditional crystal rods. Excellent thermal management performance also enables the structure to achieve hundred-watt level ultra-short pulse output with good optical parameters. The hybrid fiber-single crystal fiber ultrashort pulse amplification system combined the high gain property of fiber laser and high peak power property of crystal gain medium. In order to further improve the average power and pulse energy， it has been less effective by simply stretching the pulse duration in time domain and increasing the optical fiber mode area in the space domain， technologies such as coherent beam combination can obtain much higher power and larger energy. When the output power of the laser is less than 200 W， the single crystal fiber can consitute a simple and reliable amplification setup. For higher power output， it can also be used as a stable， cost-effective seeder with good optical parameters for solid state amplifier， such as thin-disk lasers. In the future development of lasers， the research and development of fiber laser with appropriate wavelength for pump source and the continuous optimization of brightness of fiber coupled laser diode can effectively improve the amplification efficiency of ytterbium-doped single crystal fiber， and achieve a wider application in the field of ultrafast laser. The cladding structure of crystal fiber can increase the ratio of surface area to volume of single crystal fiber， by improving the heat transfer performance of cladding and the thermal management ability of fiber can realize the long distance fundamental mode waveguide， and finally realize the high power laser with higher efficiency， which is also an important direction of future development. Therefore， single crystal fiber as amplification gain medium has been widely used in ultrashort pulse amplification and has important application prospects in scientific research， national defense， industrial processing and other fields. This paper mainly introduces the structure and preparation methods of single crystal fiber， and the main research methods and results of ultrashort pulse amplification technology based on single crystal fiber in 1 μm waveband， including the main progress made by our research group， the prospect and development direction of single crystal fiber amplification technology are also discussed and prospected.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:69
Main heading:Ultrashort pulses
Controlled terms:Crystal structure - Electromagnetic pulse - Fiber amplifiers - Fiber lasers - Micromachining - Optical pumping - Phase modulation - Pulse repetition rate - Single mode fibers - Stimulated Brillouin scattering
Uncontrolled terms:Amplification structure - Chirped-pulse-amplification - Crystal fiber - Energy - High energy - High power - Singel crystal fiber - Single crystal fiber - Ultra-short pulse amplification - Ultrashort-pulse
Classification code:604.2 Machining Operations - 701 Electricity and Magnetism - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.1 Lasers, General - 744.4 Solid State Lasers - 933.1.1 Crystal Lattice
Numerical data indexing:Power 2.00E+02W, Size 1.00E-06m
DOI:10.3788/gzxb20225108.0851513
Funding details: Number: 2022KJXX-98, Acronym: -, Sponsor: -;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2021YN12, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XIOPMQCH2021007, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:Key Project of "Double Chain" Integration of Shaanxi Province， National Natural Science Foundation of China （No. 61690222）， Chinese Academy of Science "Light of West China" Program （No. XAB2021YN12）， Shaanxi Young Science and Technology Star （No. 2022KJXX-98）， Youth Innovation Promotion Association XIOPM-CAS （No. XIOPMQCH2021007）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 66>
Accession number:20214010987220
Title:Spectroscopic properties of Er<sup>3+</sup>-doped fluoroindate glasses
Authors:Liu, Zhen (1, 2); She, Jiangbo (1, 3); Peng, Bo (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences (UCAS), Beijing; 100049, China; (3) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:She, Jiangbo(shejb@opt.ac.cn)
Source title:Journal of Rare Earths
Abbreviated source title:J Rare Earth
Volume:40
Issue:7
Issue date:July 2022
Publication year:2022
Pages:1037-1042
Language:English
ISSN:10020721
CODEN:JREAE6
Document type:Journal article (JA)
Publisher:Editorial Office of Chinese Rare Earths
Abstract:<div data-language="eng" data-ev-field="abstract">The optical and thermal properties of a new class of fluoroindate glass with different erbium contents were investigated via Raman, transmission, and fluorescence spectroscopies, fluorescence decay curve analysis, and differential scanning calorimetry. The strength parameters of the samples were calculated using the Judd–Ofelt theory. The mid-infrared luminescence properties of erbium-doped fluoroindate glasses were studied, and a strong emission at 2.7 μm was obtained. Compared with the traditional ZBLAN glass, this glass has excellent emission properties, especially a longer fluorescence lifetime (7.09 ms) and larger emission cross-section (6.95 × 10<sup>−21</sup> cm<sup>2</sup>) at 2.7 μm. The results indicate that fluoroindate glass is an attractive host for mid-infrared lasers and as a gain medium for optical amplifier applications.<br/></div> © 2021
Number of references:39
Main heading:Rare earths
Controlled terms:Fluorescence spectroscopy - Glass - Optical materials - Erbium - Fluorescence - Infrared devices - Differential scanning calorimetry
Uncontrolled terms:Curve analysis - Decay curves - Doped fluoroindates glass - Fluorescence decays - Fluoroindate glass - Midinfrared - Optical and thermal properties - Rare-earths - Spectroscopic property - Strength parameters
Classification code:547.2 Rare Earth Metals - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 812.3 Glass - 941.3 Optical Instruments - 941.4 Optical Variables Measurements - 944.6 Temperature Measurements
Numerical data indexing:Size 2.70E-06m, Size 6.95E-23m, Time 7.09E-03s
DOI:10.1016/j.jre.2021.05.011
Funding details: Number: 61308086, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017447, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Foundation item : Project supported by the National Natural Science Foundation of China ( 61308086 ), and CAS Light of West China Program ( 2017447 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 67>
Accession number:20220511555197
Title:All-optical Ti3C2Tx modulator based on a sandwich structure
Authors:Li, Erkang (1); Jiang, Man (1); Li, Duidui (1); Wang, Ruiduo (2, 3); Kang, Xin (1); Wang, Tianqi (1); Yan, Xiaoxin (1); Liu, Beibei (1); Ren, Zhaoyu (1)
Author affiliation:(1) State Key Laboratory of Photon-Technology inWestern China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics & Photon Technology, Northwest University, Xi'an; 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Jiang, Man(jmnwu@nwu.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:4
Issue date:February 1, 2022
Publication year:2022
Pages:925-930
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">All-optical modulators based on MXene-Ti3C2Tx have recently garnered much attention due to their broadband light-matter interactions and its ultrafast carrier dynamics. To investigate the modulation characteristics of pump intensity and pump light modulation frequency, we establish an all-optical modulator with a sandwich structure based on MXene-Ti3C2Tx=PVA (polyvinyl alcohol) film. The result shows that this modulator can achieve a high modulation depth of 12.55 dB and a modulation frequency of 50 kHz corresponding to a response time at the microsecond scale. The successful preparation of the modulator is attributed to the saturable absorption characteristics of the MXene-Ti3C2Tx. This modulator has great potential in all-optical communications and ultrafast optical signal processing.<br/></div> © 2022 Optica Publishing Group.
Number of references:37
Main heading:Light modulators
Controlled terms:Optical communication - Sandwich structures - Frequency modulation - Optical signal processing - Light modulation
Uncontrolled terms:All optical - Broadband light - Light modulation frequency - Light-matter interactions - Modulation characteristics - Pump intensities - Pump-light - PVA (polyvinyl alcohol) film - Structure-based - Ultrafast carrier dynamics
Classification code:717.1 Optical Communication Systems - 741.1 Light/Optics
Numerical data indexing:Decibel 1.255E+01dB, Frequency 5.00E+04Hz
DOI:10.1364/AO.445975
Funding details: Number: 61505162,61905193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JM316, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. The International Cooperative Program (2014DFR10780); National Natural Science Foundation of China (61505162, 61905193); \Natural Science Basic Research Plan in Shaanxi Province of China (2021JM316).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 68>
Accession number:20220213828
Title:Gap solitons in parity-time symmetric moiré optical lattices
Authors:Liu, Xiuye (1, 2); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 21, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Parity-time (PT) symmetric lattices have been widely studied in controlling the flow of waves, and recently moiré superlattices, connecting the periodic and non-periodic potentials, are introduced for exploring unconventional physical properties in physics; while the combination of both and nonlinear waves therein remains unclear. Here, we report a theoretical survey of nonlinear wave localizations in PT symmetric moiré optical lattices, with the aim of revealing localized gap modes of different types and their stabilization mechanism. We uncover the formation, properties, and dynamics of fundamental and higher-order gap solitons as well as vortical ones with topological charge, all residing in the finite band gaps of the underlying linear-Bloch wave spectrum. The stability regions of the localized gap modes are inspected in two numerical ways: linear-stability analysis and direct perturbed simulations. Our results provide an insightful understanding of solitons physics in combined versatile platforms of PT symmetric systems and moiré patterns.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:50
Main heading:Optical lattices
Controlled terms:Crystal lattices - Energy gap - Linear stability analysis - Nonlinear optics - Optical materials - Solitons
Uncontrolled terms:Gap modes - Gap soliton - High-order - Localised - Nonlinear waves - Periodic potentials - Property - Stabilization mechanisms - Symmetrics - Wave localization
Classification code:741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems - 744.8 Laser Beam Interactions - 921 Mathematics - 933.1.1 Crystal Lattice
DOI:10.48550/arXiv.2206.10804
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.10804v2
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 69>
Accession number:20213810910150
Title:Optical vortex array with deformable hybrid Ferris structures
Authors:Long, Zixu (1, 2); Zhang, Hao (1); Tai, Yuping (3); Tang, Miaomiao (1); Li, Hehe (1); Li, Xinzhong (1, 2)
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang; 471023, China
Corresponding author:Li, Xinzhong(xzli@haust.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:145
Issue date:January 2022
Publication year:2022
Article number:107524
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We proposed an optical vortex array (OVA) with deformable hybrid Ferris structures (DH-OVA). The DH-OVA was generated via the coaxial coherent superposition of two grafted elliptic perfect optical vortices (OVs) with different topological charges (TCs). The proposed DH-OVA exhibited the capacity of a free transformation from a circle to an ellipse except for the modulation of the number and sign of the unit OVs on the array. The OV distribution obeys the rule of uniform distribution of the area on the upper or lower half. By adjusting the initial phase difference, the orientation factor, and the direction of the grafted axis, a more complex OV motion and the entire hybrid rotation of the DH-OVA can be easily conducted according to the desired application. For instance, for the unidirectional and bidirectional motions of the OVs, regardless of whether they possessed the same or opposite signs, the entire rotation contained the unit OV's motion. During the OV's motion, the number of dark cores was not conserved, whereas the total TCs of the OVs were conserved on the DH-OVA. Results contrasted with the conventional wisdom on OVAs. Furthermore, the bidirectional motion of yeast particles via the DH-OVA was executed experimentally. This work provided a flexible DH-OVA, which will result in new potential applications in particle transfer, polarity particle sorting, and micro-particle manipulation.<br/></div> © 2021 Elsevier Ltd
Number of references:46
Main heading:Deformation
Controlled terms:Screening - Physical optics - Vortex flow
Uncontrolled terms:Bidirectional motion - Coherent superpositions - Optical vortex array - Optical vortices - Perfect optical vortex - Topological charges - Uniform distribution - Vortex arrays - Vortex distribution
Classification code:631.1 Fluid Flow, General - 741.1 Light/Optics - 802.3 Chemical Operations
DOI:10.1016/j.optlastec.2021.107524
Funding details: Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201901, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:This work is supported by National Natural Science Foundation of China ( No. 11974102 ), Key Scientific Research Projects of Institutions of Higher Learning of Henan Province Education Department ( No. 21zx002 ), and State Key Laboratory of Transient Optics and Photonics ( No. SKLST201901 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 70>
Accession number:20221812056608
Title:Fe<inf>3</inf>O<inf>4</inf> nanoparticle-enabled Q-switched pulse generation in fiber laser
Authors:Ban, Xiaoqiang (1, 2); Sun, Penghuan (3); Qyyum, Abdul (3); Li, Xiaohui (3); Song, Zhuoying (3); Zhong, Ming (4); Little, Brent E. (1, 2); Zhao, Wei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics & Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:71
Issue date:July 2022
Publication year:2022
Article number:102909
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Fe<inf>3</inf>O<inf>4</inf> nanoparticles (Fe<inf>3</inf>O<inf>4</inf>-NPs) are outstanding magnetic materials, which have plenty of applications in many fields, such as magnetic detection, ultrafast photonics, optical communication, etc. In this paper, we used co-precipitation method to synthesize Fe<inf>3</inf>O<inf>4</inf>-NPs, which formed saturable absorber (SA) in our erbium-doped fiber laser (EDFL). We obtained stable Q-switched pulses with central wavelength of 1530.46 nm and signal-to-noise ratio (SNR) of 54.4 dB when the pump power was 400 mW. When the pump power increased gradually, outline of the spectrum changed little, however, the repetition rate (RPR) increased gradually, meanwhile the pulse duration decreased gradually. In this experiment, when the pump power reached its maximum of 415.4 mW, the RPR reached its maximum of 72 kHz, meanwhile the pulse duration reached its minimum of 2.44 μs. It shows that Fe<inf>3</inf>O<inf>4</inf>-NPs-based passively Q-switched EDFLs have many potential applications, such as laser frequency doubling, laser radar, and study of interaction between light and matter, etc.<br/></div> © 2022 Elsevier Inc.
Number of references:50
Main heading:Magnetite
Controlled terms:Pulse repetition rate - Saturable absorbers - Synthesis (chemical) - Fiber lasers - Precipitation (chemical) - Signal to noise ratio - Nanomagnetics - Optical pumping - Q switching - Nanoparticles
Uncontrolled terms:Fe3O4 nanoparticle - In-fiber - Magnetic detection - Pulse durations - Pulse generation - Pump power - Q-switched pulse - Q-switches - Repetition rate - Ultra-fast photonics
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 716.1 Information Theory and Signal Processing - 744.1 Lasers, General - 744.4 Solid State Lasers - 744.8 Laser Beam Interactions - 761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 933 Solid State Physics
Numerical data indexing:Decibel 5.44E+01dB, Frequency 7.20E+04Hz, Power 4.00E-01W, Power 4.154E-01W, Size 1.53046E-06m, Time 2.44E-06s
DOI:10.1016/j.yofte.2022.102909
Funding details: Number: 1110010717,1112010209,18QNGG006, Acronym: -, Sponsor: Shaanxi Normal University;Number: 2020CSLY005,GK201802006, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This research was supported by the International Science &Technology Cooperation and Exchanges Project of Shaanxi (No.2020KW-005); Funded projects for the Academic Leader and Academic Backbones, Shaanxi Normal University (No. 18QNGG006); Starting Grants of Shaanxi Normal University (Grant Nos. 1112010209 and 1110010717 ); Fundamental Research Funds For the Central Universities (No. GK201802006, 2020CSLY005).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 71>
Accession number:20214511139695
Title:Graphene/Epoxy Composite Based Broadband All-Optical Tunable Fiber Microcavity Filter
Authors:Li, Yang (1, 2, 3); Dong, Bo (4); Chen, Enqing (3); Wang, Xiaoli (3); Li, Ziwan (3); Zhao, Yudi (3); Zhao, Wei (2, 5); Wang, Yishan (2)
Author affiliation:(1) Key Laboratory of Aperture Array and Space Application, 38th Research Institute of China Electronics Technology Group Corporation, Hefei; 230000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese, Academy of Sciences, Beijing; 100049, China; (4) College of New Materials and New Energies, Shenzhen Technology University, Shenzhen; 518118, China; (5) Collaborative Innovation Center, Extreme Optics Shanxi University, Taiyuan; 030006, China
Corresponding author:Dong, Bo(dongbo@sztu.edu.cn)
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:40
Issue:4
Issue date:February 15, 2022
Publication year:2022
Pages:1167-1172
Language:English
ISSN:07338724
E-ISSN:15582213
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A graphene/epoxy composite based broadband all-optical tunable fiber microcavity filter is presented. The graphene/epoxy composite based microcavity shows the excellent all-optical controlability. Since the light acts on the graphene/epoxy composite directly, the microcavity has stronger optical Kerr effect and photothermal effect induced by the optical pump. Experimental results show that its wavelength tuning range and tuning step reach 25.54 nm and -832 pm/mW, respectively. It is expected to be applied in the fields of tunable optical filters, optical communication, optical sensors, fiber lasers, and spectrum scanning.<br/></div> © 1983-2012 IEEE.
Number of references:21
Main heading:Epoxy composites
Controlled terms:Fibers - Graphene - Pumps - Optical fiber communication - Fiber lasers - Microcavities - Optical Kerr effect - Optical pumping
Uncontrolled terms:All optical - All-optical tunable filter; - Epoxy composite - Fiber microcavity; - Graphene/epoxy composite - Optical fiber filters - Optical tunable filters - Optical-fiber communication - Tunables - Tuning
Classification code:618.2 Pumps - 714 Electronic Components and Tubes - 717.1 Optical Communication Systems - 741.1 Light/Optics - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally - 951 Materials Science
Numerical data indexing:Size 2.554E-08m, Size 8.32E-10m
DOI:10.1109/JLT.2021.3125189
Funding details: Number: SZWD2021006, Acronym: -, Sponsor: -;Number: 2020KCXT029, Acronym: -, Sponsor: -;Number: Y829321213, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021ZDZX1013, Acronym: -, Sponsor: -;
Funding text:This work was supported in part by the CAS under Grant Y829321213, in part by the General Project of Shenzhen University stable support Program under Grant SZWD2021006, in part by the Special Project for key fields of colleges and Universities in Guangdong under Grant 2021ZDZX1013, and in part by the Innovation Team Project of Guangdong University Scientific Research Platform of Guangdong Provincial Department of Education under Grant 2020KCXT029.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 72>
Accession number:20221812063181
Title:Unsupervised Balanced Hash Codes Learning With Multichannel Feature Fusion (Open Access)
Authors:Chen, Yaxiong (1); Zhao, Dongjie (1); Lu, Xiongbo (1); Xiong, Shengwu (1); Wang, Huangting (2)
Author affiliation:(1) School of Computer and Artificial Intelligence, Wuhan University of Technology, Wuhan; 430070, China; (2) Key Laboratory of Spectral Imaging Technology Cas, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Xiong, Shengwu(xiongsw@whut.edu.cn)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:15
Issue date:2022
Publication year:2022
Pages:2816-2825
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Unsupervised hashingalgorithms are widely used in large-scale remote sensing images (RSIs) retrieval task. However, existing RSI retrieval algorithms fail to capture the multichannel characteristic of multispectral RSIs and the balanced property of hash codes, which lead the poor performance of RSI retrieval. To tackle these issues, we develop an unsupervised hashing algorithm, namely, variational autoencoder balanced hashing (VABH), to leverage multichannel feature fusion and multiscale context information to perform RSI retrieval task. First, multichannel feature fusion module is designed to extract RSI feature information by leveraging the multichannel properties of multispectral RSI. Second, multiscale learning module is developed to learn the multiscale context information of RSIs. Finally, a novel objective function is designed to capture the discrimination and balanced property of hash codes in the hashing learning process. Comprehensive experiments on diverse benchmark have well demonstrated the reasonableness and effectiveness of the proposed VABH algorithm.<br/></div> © 2008-2012 IEEE.
Number of references:50
Main heading:Hash functions
Controlled terms:Codes (symbols) - Deep learning - Learning systems - Remote sensing - Semantics
Uncontrolled terms:Balanced property - Context information - Deep hash code - Features fusions - Multi channel - Multichannel feature fusion - Multiscale context information - Multispectral remote sensing image - Remote sensing image retrieval - Unsupervised hashing learning
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing
DOI:10.1109/JSTARS.2022.3162251
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 73>
Accession number:20220811677598
Title:High-performance plasmonic sensor based on photonic crystal fiber for refractive index and temperature sensing
Authors:Meng, Xiaojian (1); Zhao, Yuanyuan (1); Li, Jianshe (1); Guo, Ying (1); Li, Shuguang (1); Guo, Haitao (2); Du, Huijing (1); Li, Zenghui (1); Li, Mengqiang (1); Feng, Yuhui (1); Wang, Luyao (1); Wang, Xiaokai (1)
Author affiliation:(1) State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao; 066004, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; 710119, China
Corresponding author:Zhao, Yuanyuan(zyy@ysu.edu.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:122
Issue date:May 2022
Publication year:2022
Article number:104036
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a refractive index and temperature plasmonic sensor based on photonic crystal fiber is proposed. In order to achieve the best performance, a serial of study on the theory and experimental steps is carried out, including simulation calculation, detection system, coating method and chemical etch technology. Experimental results demonstrate that a high average sensitivity of 3381 nm/RIU within a linear refractive index ranging from 1.3333 to 1.3860 can be achieved, which is greater than the traditional fiber structure. In addition, this sensor is helpful to measure temperature change and the sensitivity could be 2 nm/°C. Due to its easy and controllable fabrication, the proposed sensor has great application prospects in the field of optical device.<br/></div> © 2022
Number of references:30
Main heading:Photonic crystal fibers
Controlled terms:Optical fiber fabrication - Crystal whiskers - Chemical detection - Plasmonics - Refractive index - Temperature sensors
Uncontrolled terms:Coating chemicals - Coating methods - Detection system - High sensitivity - Performance - Photonic-crystal fiber - Plasmonic sensors - Refractive index sensing - Simulation calculation - Temperature sensing
Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 801 Chemistry - 932.3 Plasma Physics - 933.1.1 Crystal Lattice - 944.5 Temperature Measuring Instruments - 951 Materials Science
Numerical data indexing:Size 2.00E-09m, Size 3.381E-06m
DOI:10.1016/j.infrared.2022.104036
Funding details: Number: SKLST201908, Acronym: -, Sponsor: -;Number: 12074331, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: F2020203050, Acronym: -, Sponsor: Natural Science Foundation of Hebei Province;Number: 2019YFB2204001, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);
Funding text:This work is supported by National Key Research and Development Project (Grant No. 2019YFB2204001), the National Natural Science Foundation of China (12074331), the Program of the Natural Science Foundation of Hebei Province (Grant No. F2020203050) and the Open Research Fund of State Key Laboratory of Transient Optics and Photonics (Grant No. SKLST201908).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 74>
Accession number:20224613096930
Title:Ultra-broadband flat-top circular polarizer based on chiral fiber gratings near the dispersion turning point (Open Access)
Authors:Ren, Kaili (1, 2); Yao, Kexin (1); Han, Dongdong (1); Hu, Jiayue (1); Yang, Li (3); Zheng, Yipeng (1); Liang, Lei (1); Dong, Jun (1); Zhang, Wenfei (2, 4); Ren, Liyong (2, 5)
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui; 230027, China; (4) Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan; 250358, China; (5) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Ren, Liyong(renliy@snnu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:23
Issue date:November 7, 2022
Publication year:2022
Pages:41774-41783
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Based on the dual-resonance principle around the dispersion turning point, a scheme of chiral long-period fiber gratings (CLPGs) formed by twisting a high-birefringence (Hi-Bi) fiber is herein proposed to realise ultra-broadband flat-top circular polarizers. The coupling bandwidth is approximately seven times larger than that of traditional CLPGs. In addition, by introducing chirp characteristics in these CLPGs, an ultra-broadband flat-top circular polarizer with ∼200 nm@3 dB was conveniently achieved. Subsequently, by optimising the chirped CLPGs, a circular polarizer with a bandwidth extinction ratio of approximately 30 dB and a high level of ∼100 nm at 1 dB was realised. It was shown that the mode-controlling performances of the CLPGs can be remarkably improved, which has significant applications in light-field regulation. Finally, for the first time, it was proved that the CLPG cannot generate a vortex beam.<br/></div> © 2022 Optica Publishing Group.
Number of references:34
Main heading:Bandwidth
Controlled terms:Birefringence - Circular polarization - Diffraction gratings - Optical instruments - Ultra-wideband (UWB)
Uncontrolled terms:Chiral fiber gratings - Circular polarizers - Coupling bandwidths - Dual resonance - Extinction ratios - Flat-top - High Birefringence fibre - Long-period fibre gratings - Turning-points - Ultra-broadband
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Decibel 1.00E00dB, Decibel 3.00E+00dB, Decibel 3.00E+01dB, Size 1.00E-07m, Size 2.00E-07m
DOI:10.1364/OE.473233
Funding details: Number: 12104368, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-720,2022JM-357, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 20JK0928, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Provincial Department of Education;
Funding text:Funding. State Key Laboratory of Transient Optics and Photonics (SKLST202107); Natural Science Foundation of Shaanxi Provincial Department of Education (20JK0928); Natural Science Foundation of Shaanxi Province (2021JQ-720, 2022JM-357); National Natural Science Foundation of China (12104368).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 75>
Accession number:20215211398738
Title:Thin Piezoelectric Sheet Assisted PGC Demodulation of Fiber-Optic Integrated MZI and its Application in under Mattress Vital Signs Monitoring
Authors:Xu, Wei (1); Yu, Changyuan (2); Dong, Bo (3); Wang, Yishan (4); Zhao, Wei (4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong; (3) College of New Materials and New Energy, Shenzhen Technology University, Shenzhen; 518118, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Dong, Bo(dongbo@sztu.edu.cn)
Source title:IEEE Sensors Journal
Abbreviated source title:IEEE Sensors J.
Volume:22
Issue:3
Issue date:February 1, 2022
Publication year:2022
Pages:2151-2159
Language:English
ISSN:1530437X
E-ISSN:15581748
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A modified solid fiber-optic integrated Mach-Zehnder interferometer (IMZI) assisted with a thin piezoelectric sheet (TPS, 130 μ m thickness) and phase generated carrier (PGC) demodulation is proposed and investigated theoretically and experimentally. The IMZI's two arms are respectively molded with epoxy resin (EP) and silicone rubber (SI). These two materials are with distinctly different elastic modulus and Poisson ratios, which guarantees the high sensitivity of the IMZI. As for PGC, different modulation frequencies and amplitudes are generated and the corresponding modulation depths are calculated to obtain the optimal modulating parameters. Furthermore, a pair of complementary photodetectors are used to remove unwanted DC component and only the first harmonic is utilized to recover the phase, which can effectively avoid signal fading. In the experiments, where the IMZI is put under the mattress, activity monitoring is addressed and subjects are recruited to investigate the vital signs monitoring performance. The consistency check analysis results show the calculated heart rate variability (HRV) and breath rate variability (BRV) results are highly correlated with reference results, and the Pearson's r reaches 0.99. Moreover, reliability, post-exercise, and Valsalva Maneuver test are further conducted to verify the repeatability and dynamic monitoring capability. In conclusion, the proposed system is unobtrusive, cost-effective, robust, and convenient, which has great potential in future homecare and hospitalization.<br/></div> © 2001-2012 IEEE.
Number of references:58
Main heading:Cost effectiveness
Controlled terms:Epoxy resins - Patient monitoring - Piezoelectricity - Demodulation - Mach-Zehnder interferometers - Silicones - Matched filters - Fiber optics - Modulation
Uncontrolled terms:Fiber-optics - Integrated mach-zehnde interferometer - ITS applications - Optic integrated - Phase generated carriers - Piezoelectric sheets - Sensitivity - Solid fibers - Thin piezoelectric sheet - Vital signs monitoring
Classification code:461.6 Medicine and Pharmacology - 701.1 Electricity: Basic Concepts and Phenomena - 703.2 Electric Filters - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 815.1.1 Organic Polymers - 911.2 Industrial Economics - 941.3 Optical Instruments
DOI:10.1109/JSEN.2021.3128601
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 76>
Accession number:20220711635224
Title:Arbitrary Modulation of Airy Vortex Beam in Multi-spatial Dimensions
Title of translation:艾里涡旋光束的多空间维度自由调控
Authors:Wang, Yakun (1); Tai, Yuping (2); Li, Xinzhong (1, 3)
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China; (2) School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang; 471023, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding authors:Li, Xinzhong(xzli@haust.edu.cn); Li, Xinzhong(xzli@haust.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:1
Issue date:January 25, 2022
Publication year:2022
Article number:0151116
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">As a composite optical field, Airy vortex beam possessing transverse and longitudinal superimposed modes has abundant intensity and phase distributions. However, the composite optical field is limited to the specific propagation direction and complex modulation of the propagation trajectory. To address these issues, based on the multicoordinate transformations, one-dimensional Airy beam, two-dimensional Airy beam and Airy vortex beam have been transformed in different coordinate systems, respectively. We have realized the orientation modulation of the two lobes of Airy beam and the embedded optical vortex in the range of 0-2π, independently. We have studied the propagation properties in the propagation distances of 0, 2, 6, and 10 cm in the case of the obtuse and acute angles between two lobes of the Airy beam and the Airy vortex beam with orthogonal lobes, respectively. The results of experiments and numerical simulations show that the generated optical field can propagate along arbitrarily appointed parabolic trajectories and directions in free space. In addition, a method for measuring topological charge is proposed by adding the shift factor d when the directions of the lobes are opposite. This proposed method enables in situ determination of the embedded optical vortexes' topological charge without the need for additional optical elements, and it is immune to environmental vibration and parasitic interference. Our results promote the applications of Airy vortex beam in particle manipulation and optical cleaning and provide an alternative scheme for the modulation of composite optical field.Measurement of the topological charge and the intensity profiles at different propagation distance via the experimental setup.<br/></div> © 2022, Science Press. All right reserved.
Number of references:37
Main heading:Modulation
Controlled terms:Topology - Vortex flow - Physical optics
Uncontrolled terms:Airy beams - Airy vortex beam - Composite optical field - Multicoordinate transformation - Optical field - Optical- - Propagation - Propagation distances - Topological charges - Vortex beams
Classification code:631.1 Fluid Flow, General - 741.1 Light/Optics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
Numerical data indexing:Size 1.00E-01m
DOI:10.3788/gzxb20225101.0151116
Funding details: Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201901, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:Foundation item：National Natural Science Foundation of China（No. 11974102），Key Scientific Research Projects of Institutions of Higher Learning of Henan Province Education Department（No. 21zx002），State Key Laboratory of Transient Optics and Photonics（No. SKLST201901）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 77>
Accession number:20221311832940
Title:Mid-infrared optical parametric oscillation spanning 3.4-8.2 μm in a MgF<inf>2</inf>microresonator
Authors:Sun, Qibing (1, 2); Wu, Wei (1, 2); Wang, Yi (1, 2); Yang, Yu (3); Shi, Lei (1, 2); Ming, Xianshun (1); Wang, Leiran (1, 2); Wang, Keyi (3); Zhao, Wei (1, 2); Zhang, Wenfu (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei; 230026, China
Corresponding author:Zhang, Wenfu(wfuzhang@opt.ac.cn)
Source title:Nanotechnology
Abbreviated source title:Nanotechnology
Volume:33
Issue:21
Issue date:May 21, 2022
Publication year:2022
Article number:210003
Language:English
ISSN:09574484
E-ISSN:13616528
CODEN:NNOTER
Document type:Journal article (JA)
Publisher:IOP Publishing Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Mid-infrared optical parametric oscillators (OPOs) offer a compelling route for accessing the 'molecular fingerprint' region and, thus, can find intensive applications such as precision spectroscopy and trace gas detection. Yet it still remains rather a challenge to realize broadband mid-infrared OPOs within a single cavity, usually limited by strict phase-matching conditions for wide spectral coverage and available pump power for adequate frequency generation. Here, we report the mid-infrared parametric oscillation spanning from 3.4 to 8.2 μm, based on four-wave mixing in a high-Q MgF2 microresonator with optimized dispersion. The center wavelength at 4.78 μm is determined by the continuous tunable quantum cascade laser source, which contributes to effective expansion towards longer wavelength, as well as systemic miniaturization with smaller pump module. Such results could not only shed light on new ultimates of crystal and other microresonators, but also inspire explorations on their growing potentials in near future.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:40
Main heading:Magnesium compounds
Controlled terms:Four wave mixing - Phase matching - Pumping (laser) - Microresonators - Optical parametric oscillators - Infrared devices - Quantum cascade lasers
Uncontrolled terms:MgF2microresonator - Micro resonators - Midinfrared - Molecular fingerprint - Optical parametric oscillations - Phase matching conditions - Phase-matching condition - Precision spectroscopy - Single cavity - Trace gas detection
Classification code:713 Electronic Circuits - 741.1 Light/Optics - 744.1 Lasers, General - 744.7 Laser Components
Numerical data indexing:Size 3.40E-06m to 8.20E-06m, Size 4.78E-06m
DOI:10.1088/1361-6528/ac52bf
Funding details: Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: PKU, Sponsor: Peking University;
Funding text:This research is supported by the National Natural Science Foundation of China (Grant No. 61635013) and Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB24030600). The authors would thank Prof. Haitao Guo of Xi’an Institute of Optics and Precision Mechanics of CAS for the support of mid-infrared fibers to fabricate tapered fibers, Prof. Fengqi Liu of Institute of Semiconductors of CAS for the support of QCLs, as well as Zhejiang University and Peking University for the support of fiber tapering.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 78>
Accession number:20222012113424
Title:Numerical simulation of coaxial-coplanar dielectric-barrier discharge in atmospheric helium (Open Access)
Authors:Ran, Shuang (1, 2); Wang, Jing (1, 2); Lei, Bingying (1, 2); Liu, Simeng (1, 2); Li, Jing (3); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Duan, Yixiang (4); Tang, Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian; 223003, China; (4) Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an; 710127, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:12
Issue:5
Issue date:May 1, 2022
Publication year:2022
Article number:055209
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A self-consistent two-dimensional fluid model is employed to investigate the coaxial-coplanar dielectric-barrier discharge (DBD) excited by the sinusoidal voltage in atmospheric helium. Simulation results show that there are two current pulses in the positive half cycle, but only one in the negative half cycle. The discharge is transformed from the Townsend-like mode, through the glow-like mode, and back to the Townsend-like mode in both the positive and negative half cycles, during which the electric field line exhibits an arc-shape profile due to the configuration of coaxial-coplanar electrodes. In the glow-like mode, the cathode fall is located near the inner edge of the ground electrode at the first positive current peak, but close to the outer edge of the ground electrode at the second positive current peak. At the negative current peak, the cathode fall is distributed near the outer edge of the high voltage electrode. Since the instantaneous anode and the instantaneous cathode are on the same side of the discharge space, the dielectric layer is simultaneously covered by positive and negative surface charges due to the movement of charged particles. It is also found that the surface charge density changes significantly on the dielectric layer facing the electrodes. A further study reveals that a stronger discharge always occurs in the central circular area and an alternately complementary discharge takes place in the periphery ring area in the positive half cycle due to the activator-inhibitor effect. This feature is helpful for producing uniform plasma in a whole cycle of DBD.<br/></div> © 2022 Author(s).
Number of references:71
Main heading:Cathodes
Controlled terms:Dielectric materials - Charged particles - Dielectric devices - Helium - Electric lines - Flow control - Surface charge - Dielectric barrier discharge
Uncontrolled terms:Atmospheric helium - Cathode fall - Current peak - Current pulse - Dielectric layer - Electric field lines - Half cycle - Positive current - Sinusoidal voltage - Two dimensional fluid model
Classification code:631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 706.2 Electric Power Lines and Equipment - 708.1 Dielectric Materials - 731.3 Specific Variables Control - 804 Chemical Products Generally
DOI:10.1063/5.0089080
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 79>
Accession number:20224913207324
Title:Ultra-high-linearity integrated lithium niobate electro-optic modulators (Open Access)
Authors:Feng, Hanke (1); Zhang, Ke (1); Sun, Wenzhao (1); Ren, Yangming (2, 3); Zhang, Yiwen (1); Zhang, Wenfu (2, 3); Wang, Cheng (1)
Author affiliation:(1) Department of Electrical Engineering, State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, Hong Kong; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Cheng(cwang257@cityu.edu.hk)
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:10
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2366-2373
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Integrated lithium niobate (LN) photonics is a promising platform for future chip-scale microwave photonics systems owing to its unique electro-optic properties, low optical loss, and excellent scalability. A key enabler for such systems is a highly linear electro-optic modulator that could faithfully convert analog electrical signals into optical signals. In this work, we demonstrate a monolithic integrated LN modulator with an ultra-high spuriousfree dynamic range (SFDR) of 120.04 dB · Hz4/5 at 1 GHz, using a ring-assisted Mach-Zehnder interferometer configuration. The excellent synergy between the intrinsically linear electro-optic response of LN and an optimized linearization strategy allows us to fully suppress the cubic terms of third-order intermodulation distortions (IMD3) without active feedback controls, leading to ~20 dB improvement over previous results in the thin-film LN platform. Our ultra-high-linearity LN modulators could become a core building block for future large-scale functional microwave photonic integrated circuits by further integration with other high-performance components like low-loss delay lines, tunable filters, and phase shifters available on the LN platform.<br/></div> © 2022 Chinese Laser Press.
Number of references:47
Main heading:Niobium compounds
Controlled terms:Delay circuits - Light modulation - Light modulators - Lithium - Mach-Zehnder interferometers - Microwave photonics - Optical signal processing
Uncontrolled terms:Chip-scale - Electrical signal - Electro-optic modulators - Electro-optic properties - High linearity - Linear electro-optics - Lithium niobate - Microwave Photonics - Photonic systems - Ultra-high
Classification code:542.4 Lithium and Alloys - 549.1 Alkali Metals - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Decibel 1.2004E+02dB, Decibel 2.00E+01dB, Frequency 1.00E+09Hz
DOI:10.1364/PRJ.464650
Funding details: Number: 9610402,9610455, Acronym: -, Sponsor: City University of Hong Kong;Number: 9509005, Acronym: -, Sponsor: Croucher Foundation;Number: 61922092, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11204820,21208219,N_CityU113/20, Acronym: UGC, Sponsor: University Grants Committee;Number: -, Acronym: 研究資助局, Sponsor: Research Grants Council, University Grants Committee;Number: -, Acronym: -, Sponsor: Research Council, Damghan University;
Funding text:Funding. National Natural Science Foundation of China (61922092); Research Grants Council, University GrantsNational Natural Science Foundation of China (61922092); Research Grants Council, University Grants Committee (CityU 11204820, CityU 21208219, N_CityU113/20); Croucher Foundation (9509005); City University of Hong Kong (9610402, 9610455).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 80>
Accession number:20223512662422
Title:Highly linear integrated lithium niobate modulator based on ring-assisted Mach-Zehnder interferometer
Authors:Feng, Hanke (1); Zhang, Ke (1); Sun, Wenzhao (1); Ren, Yangming (2, 3); Zhang, Yiwen (1); Zhang, Wenfu (2, 3); Wang, Cheng (1)
Author affiliation:(1) Department of Electrical Engineering, State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, Hong Kong; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Feng, Hanke(hankefeng2-c@my.cityu.edu.hk)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:CLEO: Science and Innovations, S and I 2022
Issue date:2022
Publication year:2022
Article number:JW3B.187
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, S and I 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:181730
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We report an ultra-high-linearity modulator on thin-film lithium niobate platform based on the ring-assisted Mach-Zehnder interferometer (RAMZI) structure, with measured spurious free dynamic range (SFDR) up to 120.04 dB·Hz<sup>4/5</sup> at 1GHz.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:6
Main heading:Mach-Zehnder interferometers
Controlled terms:Light modulators - Lithium - Niobium compounds
Uncontrolled terms:High linearity - Lithium niobate - Spurious free dynamic range - Thin-films - Ultra-high
Classification code:542.4 Lithium and Alloys - 549.1 Alkali Metals - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Decibel 1.2004E+02dB, Frequency 1.00E+09Hz
Funding details: Number: 9610402,9610455, Acronym: -, Sponsor: City University of Hong Kong;Number: -, Acronym: -, Sponsor: Croucher Foundation;Number: 61922092, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11204820,21208219,N_CityU113/20, Acronym: UGC, Sponsor: University Grants Committee;Number: -, Acronym: 研究資助局, Sponsor: Research Grants Council, University Grants Committee;
Funding text:Figure 2. (a) Experimental setup for SFDR measurement. FPC, fiber polarization controller; DUT, device under test. (b) Measured output FH and IMD3 powers vs. input RF power for RAMZI (red) and MZI (blue) at 1 GHz. (c) Measured SFDR at 1GHz as a function of received optical powers In conclusion, this work demonstrates a highly linear integrated LN modulator using the RAMZI structure, achieving an ultra-high SFDR of 120.04 dB·Hz4/5 at 1 GHz, promising for future applications in high-performance integrated MWP system. 3. Acknowledgements This work is supported in part by National Natural Science Foundation of China (61922092); Research Grants Council, University Grants Committee (CityU 11204820, CityU 21208219, N_CityU113/20); Croucher Foundation; City University of Hong Kong (9610402, 9610455). 4. References
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 81>
Accession number:20221311841586
Title:Theoretical and Experimental Research on Spatial Performances of the Long-slit Streak Tube (Open Access)
Authors:Tian, Liping (1, 2); Shen, Lingbin (1); Xue, Yanhua (2); Chen, Lin (1); Li, Lili (2); Chen, Ping (2); Tian, Jinshou (2); Zhao, Wei (2)
Author affiliation:(1) School of Network and Communication Engineering, Jinling Institute of Technology, Hongjing Road, No.99, Nanjing; 211169, China; (2) Key Laboratory of of Transient Optics and Photonics, Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xinxi Road, No.17, Xi'an; 710119, China
Source title:Measurement Science Review
Abbreviated source title:Meas. Sci. Rev.
Volume:22
Issue:2
Issue date:April 1, 2022
Publication year:2022
Pages:58-64
Language:English
E-ISSN:13358871
Document type:Journal article (JA)
Publisher:Sciendo
Abstract:<div data-language="eng" data-ev-field="abstract">The streak tubes are widely used in National Ignition Facility (NIF), Inertial Confinement Fusion (ICF), and streak tube imaging lidar (STIL) as radiation or imaging detectors. The spatial resolution and effective photocathode area of the streak tube are strongly dependent on its operating and geometry parameters (electron optical structure and applied voltage). Studies about this dependence do not cover the full range of the parameters. In this paper, 3-D models are developed in Computer Simulation Technology Particle Studio (CST-PS) to comprehensively calculate the spatial resolution for various parameters. Monte Carlo Sampling method (M-C method) and spatial modulation transfer function method (SMTF) are employed in our simulation. Simulated results of the optimized spatial resolution are validated by the experimental data. Finally, the radii of the photocathode (Rc) and phosphor screen (Rs) are optimized. Geometry parameters of Rc=60 mm and Rs=80 mm are proposed to optimize the streak tube performances. Simulation and experimental results show that the spatial resolution and effective photocathode area of this streak tube are expected to reach 16 lp/mm and 30 mm-length while the voltage between cathode and grid (Ucg) is 150 V.<br/></div> © 2022 Liping Tian et al., published by Sciendo.
Number of references:13
Main heading:Photocathodes
Controlled terms:Monte Carlo methods - Optical radar - Streak cameras - Image resolution - Tubes (components)
Uncontrolled terms:Experimental research - Geometry parameter - National ignition facility - Slit streak tubes - Spatial performance - Spatial resolution - Streak tubes - Temporal resolution - Theoretical research - Ultrafast detectors
Classification code:619.1 Pipe, Piping and Pipelines - 714.1 Electron Tubes - 716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 922.2 Mathematical Statistics
Numerical data indexing:Size 3.00E-02m, Size 6.00E-02m, Size 8.00E-02m, Voltage 1.50E+02V
DOI:10.2478/msr-2022-0007
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 82>
Accession number:20224212973253
Title:Epitaxially-Stacked High Efficiency Laser Diodes Near 905 nm (Open Access)
Authors:Zhao, Yuliang (1, 2); Yang, Guowen (1, 2); Zhao, Yongming (3); Tang, Song (3); Lan, Yu (1, 2); Liu, Yuxian (1, 2); Wang, Zhenfu (1); Demir, Abdullah (4)
Author affiliation:(1) Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Dogain Laser Technology (Suzhou) Company, Ltd, Suzhou; 215123, China; (4) Bilkent University, UNAM-Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey
Corresponding authors:Yang, Guowen(yangguowen@opt.cn); Demir, Abdullah(demirab@gmail.com)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:6
Issue date:December 1, 2022
Publication year:2022
Article number:1557006
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We report on studying tunnel junctions and an optical cavity structure for developing epitaxially-stacked high-efficiency 905 nm high-power laser diodes. The GaAs tunnel junctions were explored via simulations and experiments to realize a high peak current density of 7.7 × 10<sup>4</sup> A/cm<sup>2</sup> and a low specific resistance of 1.5 × 10<sup>-5</sup> Ωcm<sup>2</sup> with a high n-doping concentration of 6 × 1019 cm<sup>-3</sup>. Employing a low-loss epitaxial structure design, single-, double-, and triple-cavity structure laser diodes demonstrated power scaling by epitaxial stacking. Triple-cavity laser diodes have a low optical loss (0.42 cm-1) and generate a peak power of 83 W with a short cavity length of 750 μm at a limited current of 30 A.<br/></div> © 2009-2012 IEEE.
Number of references:32
Main heading:Tunnel junctions
Controlled terms:Diodes - Efficiency - Gallium arsenide - High power lasers - III-V semiconductors - Semiconductor lasers
Uncontrolled terms:Doping concentration - Epitaxial stacking - Higher efficiency - Low optical loss - N-Doping - N-doping concentration - Optical device fabrication - Optical refraction - Power-scaling - Resistance - Specific resistances - Stackings
Classification code:712.1 Semiconducting Materials - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 804 Chemical Products Generally - 913.1 Production Engineering
Numerical data indexing:Electric current 3.00E+01A, Electric current 4.00E+00A, Power 8.30E+01W, Size 1.90E-01m, Size 4.20E-03m, Size 9.05E-07m
DOI:10.1109/JPHOT.2022.3211964
Funding details: Number: 2017KJXX-72, Acronym: -, Sponsor: -;Number: 61504167, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2015JQ6263,2018JM6010,2019ZY-CXPT-03-05, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61504167, in part by the Natural Science Foundation of Shaanxi Province, China under Grants 2019ZY-CXPT-03-05, 2018JM6010 and 2015JQ6263 and in part by the Talent Project of Science and Technology Department of Shaanxi Province under Grant 2017KJXX-72.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 83>
Accession number:20224112870223
Title:48 W Continuous-Wave Output From a High- Efficiency Single Emitter Laser Diode at 915 nm (Open Access)
Authors:Liu, Yuxian (1, 2); Yang, Guowen (1, 2, 3); Zhao, Yongming (3); Tang, Song (3); Lan, Yu (1, 2); Zhao, Yuliang (1, 2); Demir, Abdullah (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Dogain Laser Technology (Suzhou) Company Ltd., Suzhou; 215123, China; (4) UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara; 06800, Turkey
Corresponding authors:Yang, Guowen(yangguowen@opt.ac.cn); Demir, Abdullah(abdullah.demir@unam.bilkent.edu.tr)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:34
Issue:22
Issue date:November 15, 2022
Publication year:2022
Pages:1218-1221
Language:English
ISSN:10411135
E-ISSN:19410174
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Improving the power and efficiency of 9xx-nm broad-area laser diodes has a great help in reducing the cost of laser systems and expanding applications. This letter presents an optimized epitaxial structure with high power and conversion efficiency. Laser diodes with 230 $\mu \text{m}$ emitter width and 5 mm cavity length deliver continuous-wave output power up to 48.5 W at 48 A, 30 °C, the highest power reported for 9xx-nm single emitter lasers so far. The slope efficiency is as high as 1.23 W/A due to a low internal optical loss of 0.31 cm-1 and a high internal efficiency of 96%. The maximum power conversion efficiency reaches 72.6% at 15.3 W and 67.3% at the operating power of 30 W under a heatsink temperature of 25 °C. Life test results show no failure in 1000 hours for 55 laser diodes.<br/></div> © 1989-2012 IEEE.
Number of references:25
Main heading:High power lasers
Controlled terms:Continuous wave lasers - Conversion efficiency - Epitaxial growth - Semiconductor lasers
Uncontrolled terms:915 nm - Continuous Wave - High power - Higher efficiency - Optical reflection - Optical refraction - Power- generations - Single emitter lasers - Wave output
Classification code:525.5 Energy Conversion Issues - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 802.3 Chemical Operations - 933.1.2 Crystal Growth
Numerical data indexing:Size 5.00E-03m, Size 9.15E-07m, Electric current 4.80E+01A, Percentage 6.73E+01%, Percentage 7.26E+01%, Percentage 9.60E+01%, Power 1.23E+00W, Power 1.53E+01W, Power 3.00E+01W, Power 4.80E+01W, Power 4.85E+01W, Size 3.10E-03m, Time 3.60E+06s
DOI:10.1109/LPT.2022.3207786
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 84>
Accession number:20224513055520
Title:Stokes Localized Structure in Kerr Resonators
Authors:Liu, Mulong (1); Huang, Huimin (2); Lu, Zhizhou (3); Dang, Yaai (1); Mei, Sen (1); Wang, Chang (1); Zhao, Bailing (3); Zhao, Wei (4)
Author affiliation:(1) School of Science, Northwest A&F University, Yangling; 712100, China; (2) College of Information Engineering, Northwest A&F University, Yangling; 712100, China; (3) Chongqing United Microelectronics Center (CUMEC), Xiyuan South Street, Chongqing; 401332, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China
Corresponding authors:Huang, Huimin(huanghm@nwafu.edu.cn); Lu, Zhizhou(zhizhou.lu@cumec.cn)
Source title:Physical Review Applied
Abbreviated source title:Phys. Rev. Appl.
Volume:18
Issue:4
Issue date:October 2022
Publication year:2022
Article number:044028
Language:English
E-ISSN:23317019
Document type:Journal article (JA)
Publisher:American Physical Society
Abstract:<div data-language="eng" data-ev-field="abstract">We theoretically demonstrate generation of the Stokes temporal localized structure (TLS) by exploiting its Raman interaction in space and time within an optical potential well shared with another dark pulse. Excitation of the Stokes TLSs is feasible in both the normal and anomalous group-velocity dispersion regime, with a single modulated pump source. Stimulated Raman scattering constitutes influences on the stability and physical feature of the generated Stokes TLS (STLS). Particularly, breathing STLSs are also observed due to the periodic energy transfer between the primary and the Stokes fields. These findings could deepen the understanding of complex nonlinear dynamics in resonators and facilitate the excitation of different types of TLSs in potential platforms.<br/></div> © 2022 American Physical Society.
Number of references:41
Main heading:Resonators
Controlled terms:Energy transfer - Group velocity dispersion
Uncontrolled terms:Dark pulse - Energy-transfer - Group-velocity dispersions - Localized structures - Optical potential wells - Periodic energy - Physical features - Pump sources - Raman interactions - Space and time
DOI:10.1103/PhysRevApplied.18.044028
Funding details: Number: 12204381,52002331, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-280,2022JQ-066,2022JQ-688, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work is supported by the Natural Science Basic Research Program of Shaanxi with Grants No. 2022JQ-066, No. 2022JQ-688, and No. 2020JQ-280. National Natural Science Foundation of China (NSFC) (No. 12204381, 52002331).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 85>
Accession number:20223412609225
Title:Elimination of catastrophic optical mirror damage in continuous-wave high-power laser diodes using multi-section waveguides (Open Access)
Authors:Liu, Yuxian (1, 2); Ebadi, Kaveh (3); Sunnetcioglu, Ali Kaan (3); Gundogdu, Sinan (3); Sengul, Serdar (3); Zhao, Yuliang (1, 2); Lan, Yu (1, 2); Zhao, Yongming (4); Yang, Guowen (1, 2, 4); Demir, Abdullah (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Bilkent University, UNAM, Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey; (4) Dogain Laser Technology (Suzhou) Co., Ltd., Suzhou; 215123, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:18
Issue date:August 29, 2022
Publication year:2022
Pages:31539-31549
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">One of the persistent obstacles for high-power laser diodes (LDs) has been the catastrophic optical mirror damage (COMD), which limits the operating power level and lifetime of commercial high-power LDs. The output facet of LD reaches a critical temperature resulting in COMD, which is an irreversible device failure. Here, we fabricate multi-section LDs by tailoring the waveguide structure along the cavity that separates the output facet from the heat-generating lasing region. In this method, the LD waveguide is divided into electrically isolated laser and window sections along the cavity. The laser section is pumped at a high current to achieve high output power, and the window is biased at a low current with negligible heat generation. This design restricts the thermal impact of the laser section on the facet, and the window section allows lossless transport of the laser to the output facet. The lasers were operated continuous-wave up to the maximum achievable power. While standard LDs show COMD failures, the multi-section waveguide LDs are COMD-free. Our technique and results provide a pathway for high-reliability LDs, which would find diverse applications in semiconductor lasers.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:31
Main heading:Semiconductor lasers
Controlled terms:Continuous wave lasers - Heat generation - High power lasers - Laser mirrors - Pumping (laser) - Waveguides
Uncontrolled terms:Catastrophic optical mirror damages - Continuous Wave - Critical temperatures - Device failures - High power laser diode - Multi-section - Multisection lasers - Operating power - Power levels - Waveguide structure
Classification code:714.3 Waveguides - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 744.7 Laser Components
DOI:10.1364/OE.461866
Funding details: Number: 118F057, Acronym: TÜBİTAK, Sponsor: Türkiye Bilimsel ve Teknolojik Araştırma Kurumu;
Funding text:TÜBİTAK (118F057); Dogain Laser Technology (Suzhou) Co., Ltd.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 86>
Accession number:20214211041610
Title:A novel microstructured polymer tube for THz vortex beams guidance
Authors:Yuan, Yuan (1, 2); Kong, Depeng (1); Guan, Lei (1); Wang, Lili (1)
Author affiliation:(1) Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Information road 17, Xi'anShannxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Kong, Depeng(kongdp@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:505
Issue date:February 15, 2022
Publication year:2022
Article number:127502
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">A novel microstructured polymer tube (MPT) incorporating a central hollow, ring core, porous outer cladding is proposed for terahertz (THz) orbital angular momentum (OAM) guidance, focusing on the enhancement of the quantity of modes and bandwidth. The proposed MPT can support 70 modes (66 THz OAM ones) with large mode effective refractive index separation (>2.197×10<sup>−3</sup>) over 0.6∼1.25 THz while maintaining single-mode condition radially, and the number of guiding modes can be further increased by properly equiproportional enhancing the size of the tube. Besides, the designed MPT has strong confinement property, high purity (>97.06%), and flat dispersion over the whole operating bandwidth. The result of this work reveals that this kind of MPT is promising to accelerate the development of the compact, light-weight THz communication system, and can be applied in OAM-based mode-division multiplexing combined with wavelength-division multiplexing technique without multiple-input multiple-output digital signal processing.<br/></div> © 2021 Elsevier B.V.
Number of references:48
Main heading:Plastic optical fibers
Controlled terms:Vortex flow - Digital signal processing - Refractive index - Microstructure - Optical fiber communication - Bandwidth
Uncontrolled terms:Fiber design - Optical vortices - Optical-fiber communication - Orbital angular momentum - Polymer optical fiber - Polymer optical fibre - Polymer tubes - Ring-core - Tera Hertz - Vortex beams
Classification code:631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.1.2 Fiber Optics - 951 Materials Science
Numerical data indexing:Frequency 1.25E+12Hz, Frequency 6.60E+13Hz, Percentage 9.706E+01%
DOI:10.1016/j.optcom.2021.127502
Funding details: Number: 095920201317, Acronym: -, Sponsor: -;Number: 11474351,11504416,61535015,62071465, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021GY-048, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: -, Acronym: XAST, Sponsor: Xi'an Science and Technology Association;
Funding text:National Natural Science Foundation of China (NSFC) (11474351, 62071465, 11504416, 61535015); Provincial Key Research and Development Program of Shaanxi, China (2021GY-048); Youth Talent Lift Project of Xi'an Science and Technology Association, China (095920201317).National Natural Science Foundation of China (NSFC) ( 11474351 , 62071465 , 11504416 , 61535015 ); Provincial Key Research and Development Program of Shaanxi, China ( 2021GY-048 ); Youth Talent Lift Project of Xi’an Science and Technology Association, China ( 095920201317 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 87>
Accession number:20222112147863
Title:Facet passivation process of high-power laser diodes by plasma cleaning and ZnO film
Authors:Lan, Yu (1, 2); Yang, Guowen (1, 2, 3); Zhao, Yuliang (1, 2); Liu, Yuxian (1, 2); Demir, Abdullah (4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Dogain Laser Technology (Suzhou) Co., Ltd., Suzhou; 215123, China; (4) Bilkent University, UNAM - Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey
Corresponding author:Yang, Guowen(yangguowen@opt.ac.cn)
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:596
Issue date:September 15, 2022
Publication year:2022
Article number:153506
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Passivation of dangling bonds at the cleaved mirror facet and its durability are fundamental features of semiconductor lasers to obtain reliable operation with a long device lifetime. The high non-radiative recombination activity of the surface states needs to be controlled to prevent the Fermi level pinning before the deposition of mirror coating materials. Here, we report the incorporation of plasma cleaning of the facet and ZnO film as a passivation layer for the fabrication of high-power semiconductor lasers. The Argon plasma cleaning process was investigated to eliminate surface contamination without damaging the cavity surface. The ZnO passivation films were systematically studied by varying the chamber pressure and sputtering power of the radio frequency (RF) sputter coating process. We obtained homogeneous and dense ZnO films with high surface quality and optical absorption coefficient of zero. By incorporating the optimum plasma cleaning and passivation layer parameters, GaAs-based laser devices with significantly improved catastrophic optical mirror damage (COMD) power were achieved. COMD threshold was increased from 11.9 W to 20.7 W. The life test results demonstrate no failure for facet cleaned and passivated devices for more than 500 h, confirming the long-term effectiveness of the process for actual device integration.<br/></div> © 2022 Elsevier B.V.
Number of references:46
Main heading:Semiconductor lasers
Controlled terms:Semiconductor diodes - III-V semiconductors - II-VI semiconductors - Passivation - Laser mirrors - Coatings - Light absorption - Wide band gap semiconductors - Gallium arsenide - Cleaning - Dangling bonds - Zinc oxide
Uncontrolled terms:Catastrophic optical mirror damages - Cleaved mirrors - Facet passivation - Fundamental features - High reliability - Mirror facets - Passivation layer - Passivation process - Plasma cleaning - ZnO films
Classification code:539.2.1 Protection Methods - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.4.1 Semiconductor Lasers - 744.7 Laser Components - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 813.2 Coating Materials - 931.3 Atomic and Molecular Physics
Numerical data indexing:Power 1.19E+01W to 2.07E+01W, Time 1.80E+06s
DOI:10.1016/j.apsusc.2022.153506
Funding details: Number: -, Acronym: -, Sponsor: Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics;
Funding text:We acknowledge the Vacuum Interconnected Nanotech Workstation of Suzhou Institute of Nano-Tech and Nano-Bionics for the support of this work.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 88>
Accession number:20224613102482
Title:High-resolution time-resolved spectroscopy based on hybrid asynchronous optical sampling (Open Access)
Authors:Hu, Hao (1, 2); Yang, Ningning (1, 2); Liao, Zichun (1, 2); Chen, Liao (1, 2); Zhang, Chi (1, 2); Wang, Weiqiang (3, 4); Zhang, Wenfu (3, 4); Zhang, Xinliang (1, 2)
Author affiliation:(1) Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) Optics Valley Laboratory, Wuhan; 430074, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Zhang, Chi(chizheung@hust.edu.cn); Zhang, Xinliang(xlzhang@mail.hust.edu.cn); Zhang, Wenfu(wfuzhang@opt.ac.cn)
Source title:APL Photonics
Abbreviated source title:APL Photonics
Volume:7
Issue:10
Issue date:October 1, 2022
Publication year:2022
Article number:106105
Language:English
E-ISSN:23780967
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The capability of characterizing arbitrary and non-repetitive emission spectra with a high resolution in real-time is of great merit in various research fields. Optical frequency combs provide precise and stable frequency grids for the measurement of a single spectral line with high accuracy. Particularly, dual-comb spectroscopy enables spectral measurement with a large bandwidth spanning tens of nanometers, but it is limited to measuring absorption spectra and has to trade-off spectral resolution vs the acquisition frame rate set by the repetition rate. Here, to alleviate these restrictions, we propose and demonstrate time-resolved spectroscopy for an emission spectrum based on hybrid asynchronous optical sampling, which features a spectral resolution of 0.63 pm, a frame rate of 1 MHz, and a measurement bandwidth of 13.6 nm, simultaneously. A mode-locked fiber comb with a repetition frequency of f1 is harnessed to interrogate emission spectral features with high resolution via optical Fourier transform achieved using a time-lens. Subsequently, a soliton microcomb of repetition frequency f2s ≈ 1000f1 serving as a probe pulse implements hybrid asynchronous optical sampling, thus significantly increasing the acquisition rate by nearly 3 orders of magnitude. As a proof-of-concept demonstration, the frequency trajectory of a rapidly scanning laser with a linear chirp of 6.2 THz/s is tracked. We believe that chip-scale microcombs will make the fast and high-resolution emission spectroscopy presented here a powerful tool for widespread applications.<br/></div> © 2022 Author(s).
Number of references:48
Main heading:Spectral resolution
Controlled terms:Bandwidth - Economic and social effects - Emission spectroscopy - Fourier series - Pulse repetition rate - Signal sampling - Time-resolved spectroscopy
Uncontrolled terms:Asynchronous optical samplings - Emission spectrums - Frame-rate - High resolution - Microcombs - Real- time - Repetition frequency - Research fields - Resolution time - Time-resolved spectroscopy
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 744.1 Lasers, General - 744.9 Laser Applications - 921.3 Mathematical Transformations - 922 Statistical Methods - 971 Social Sciences
Numerical data indexing:Frequency 1.00E+06Hz, Frequency 6.20E+12Hz, Size 1.36E-08m, Size 6.30E-13m
DOI:10.1063/5.0108680
Funding details: Number: 61735006,61927817,62075072,62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;Number: 2019YFB2203102,2021YFB2800600, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The authors gratefully acknowledge the Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), for device fabrication. This work was supported by the National Key Research and Development Program of China (Grant Nos. 2019YFB2203102 and 2021YFB2800600) and the National Natural Science Foundation of China (Grant Nos. 62075238, 62075072, 61927817, and 61735006).The authors gratefully acknowledge the Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), for device fabrication. This work was supported by the National Key Research and Development Program of China (Grant Nos. 2019YFB2203102 and 2021YFB2800600) and the National Natural Science Foundation of China (Grant Nos. 62075238, 62075072, 61927817, and 61735006).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 89>
Accession number:20221111799269
Title:High Fidelity MZI-BCG Sensor With Homodyne Demodulation for Unobtrusive HR and BP Monitoring
Authors:Yang, Fangang (1); Xu, Wei (2, 6); Lyu, Weimin (3); Tan, Fengze (4); Yu, Changyuan (3); Dong, Bo (5)
Author affiliation:(1) Department Of Electrical And Computer Engineering, National University Of Singapore, 119077, Singapore; (2) State Key Laboratory Of Transient Optics And Photonics, Xi'an Institute Of Optics And Precision Mechanics, Chinese Academy Of Sciences, Xi'an, Shanxi; 710119, China; (3) Department Of Electronic And Information Engineering, The Hong Kong Polytechnic University, Hong Kong, Hong Kong; (4) Shenzhen Metalenx Technology Company Ltd., Guangdong, Shenzhen; 518101, China; (5) College Of New Materials And New Energy, Shenzhen Technology University, Guangdong, Shenzhen; 518118, China; (6) University Of Chinese Academy Of Sciences, Beijing; 100049, China
Corresponding author:Yu, Changyuan(changyuan.yu@polyu.edu.hk)
Source title:IEEE Sensors Journal
Abbreviated source title:IEEE Sensors J.
Volume:22
Issue:8
Issue date:April 15, 2022
Publication year:2022
Pages:7798-7807
Language:English
ISSN:1530437X
E-ISSN:15581748
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">An all-optical active homodyne detection aided fiber-optic Mach-Zehnder interferometer (MZI) vital signs monitoring system is proposed and investigated. The active homodyne detection is mainly realized by employing a wavelength-tunable vertical-cavity surface-emitting laser (VCSEL) and automatic closed-loop control system (CLCS). It can effectively maintain the MZI sensor to operate around the quadrature point and successfully eliminate the fading effect of output signal induced by low frequency drift. Therefore, high fidelity and high stableness of the ballistocardiograph (BCG) signal is guaranteed. The results show that according to the Bland-Altman and the confidence ellipse analysis, the heart rate (HR) monitoring performance reveals high accuracy and good consistence. What' more, a multiple linear regression-based blood pressure (BP) estimation model is presented, which shows that the BP is highly correlated with I-J-K complex oriented features, including IJ interval, JK interval and JK amplitude. It indeed offers a potential approach to achieve cuff-less BP estimation merely based on the high-fidelity BCG signal. In conclusion, the proposed MZI-BCG monitoring system is simple to use, and it shows great potential in future unobtrusive cardiac monitoring both in home and hospital.<br/></div> © 2001-2012 IEEE.
Number of references:56
Main heading:Blood pressure
Controlled terms:Optical fibers - Patient monitoring - Heart - Mach-Zehnder interferometers
Uncontrolled terms:Active homodyne - Active homondyne - Ballistocardiograph - Closed-loop control systems - Coupler - Fiber Mach-Zehnder interferometers - Heart-rate - High-fidelity - Optical fiber mach-zehnde interferometer
Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 461.9 Biology - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
DOI:10.1109/JSEN.2022.3158070
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 90>
Accession number:20222712324583
Title:Reconstruction of attosecond beating by interference of two-photon transitions on the lithium atom with Rabi oscillations
Authors:Liao, Yijie (1); Zhou, Yueming (1); Pi, Liang-Wen (2, 3); Liang, Jintai (1); Ke, Qinghua (1); Zhao, Yong (1); Li, Min (1); Lu, Peixiang (1, 4)
Author affiliation:(1) School of Physics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, The Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Science, Beijing; 100049, China; (4) Optics Valley Laboratory, Hubei; 430074, China
Source title:Physical Review A
Abbreviated source title:Phys. Rev. A
Volume:105
Issue:6
Issue date:June 2022
Publication year:2022
Article number:063110
Language:English
ISSN:24699926
E-ISSN:24699934
Document type:Journal article (JA)
Publisher:American Physical Society
Abstract:<div data-language="eng" data-ev-field="abstract">We present numerical simulations of the reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) on lithium by solving the three-dimensional time-dependent Schrödinger equation. In our scheme, the infrared (IR) field couples the 2s and 2p states of lithium and leads to the Rabi oscillations of populations between these two states. We analyzed the RABBITT phases of the two peaks in the Rabi-oscillation-induced Autler-Townes splittings. Our results show that the relative phase between these two peaks changes with the photoelectron energy and depends on the intensity of the IR field. Moreover, in the angle-resolved RABBITT measurement, the phases of the two peaks depend differently on the emission angle of photoelectrons. These behaviors are traced back to the different initial phases of the electron wave packets emitted from the dressed 2p states and the competition among different ionization channels.<br/></div> © 2022 American Physical Society.
Number of references:77
Main heading:Lithium
Controlled terms:Photoelectrons - Photoionization - Photons
Uncontrolled terms:Attoseconds - Autler-townes splitting - Infrared field - Lithium atoms - Rabi oscillations - Relative phasis - Time dependent - Transition phase - Two-photon transitions - Two-state
Classification code:542.4 Lithium and Alloys - 549.1 Alkali Metals - 711 Electromagnetic Waves - 802.2 Chemical Reactions - 931.3 Atomic and Molecular Physics
Numerical data indexing:Time 2.00E+00s
DOI:10.1103/PhysRevA.105.063110
Funding details: Number: 11874163,12021004,61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III,S19-020-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: HUST, Sponsor: Huazhong University of Science and Technology;Number: 2019YFA0308300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The authors acknowlegde stimulating discussions with Prof. W.-C. Jiang, Prof. J. M. Dahlström, M. Bertolino, and E. Olofsson. This work was supported by National Key Research and Development Program of China (Grant No. 2019YFA0308300), National Natural Science Foundation of China (Grants No. 11874163, No. 12021004, and No. 61690222), and Chinese Academy of Sciences (Grants No. J20-021-III and No. S19-020-III). The computing work in this paper is supported by the Public Service Platform of High Performance Computing provided by Network and Computing Center of Huazhong University of Science and Technology (HUST).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 91>
Accession number:20225113283921
Title:Terabit FSO communication based on a soliton microcomb
Authors:Shao, Wen (1, 2, 3); Wang, Yang (1, 2, 3); Jia, Shuaiwei (1, 2, 3); Xie, Zhuang (1, 2, 3); Gao, Duorui (1, 2, 3); Wang, Wei (1, 3); Zhang, Dongquan (1); Liao, Peixuan (1, 3); LITTLE, Brent E. (1, 3); Chu, SAI T. (4); Zhao, Wei (2, 3); Zhang, Wenfu (1, 3); Wang, Weiqiang (1, 3); Xie, Xiaoping (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:10
Issue:12
Issue date:December 1, 2022
Publication year:2022
Pages:2802-2808
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Free-space optical (FSO) communication technology is a promising approach to establish a secure wireless link, which has the advantages of excellent directionality, large bandwidth, multiple services, low mass and less power requirements, and easy and fast deployments. Increasing the communication capacity is the perennial goal in both scientific and engineer communities. In this paper, we experimentally demonstrate a Tbit/s parallel FSO communication system using a soliton microcomb as a multiple wavelength laser source. Two communication terminals are installed in two buildings with a straight-line distance of ∼1 km. 102 comb lines are modulated by 10 Gbit/s differential phase-shift keying signals and demodulated using a delay-line interferometer. When the transmitted optical power is amplified to 19.8 dBm, 42 optical channels have optical signal-to-noise ratios higher than 27 dB and bit error rates less than 1 × 10-9. Our experiment shows the feasibility of a wavelength-division multiplexing FSO communication system which suits the ultra-high-speed wireless transmission application scenarios in future satellite-based communications, disaster recovery, defense, last mile problems in networks and remote sensing, and so on.<br/></div> © 2022 Chinese Laser Press.
Number of references:37
Main heading:Solitons
Controlled terms:Optical communication - Optical remote sensing - Satellite communication systems - Signal to noise ratio
Uncontrolled terms:Free Space Optical communication - Free space optical communication systems - Free-space optical communications systems - Low-mass - Microcombs - Multiple services - Optical communication technologies - Power requirement - Terabit - Wireless link
Classification code:655.2.1 Communication Satellites - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 741.3 Optical Devices and Systems
Numerical data indexing:Bit rate 1.00E+10bit/s, Decibel 2.70E+01dB, Decibel milliwatts 1.98E+01dBm, Size 1.00E+03m
DOI:10.1364/PRJ.473559
Funding details: Number: 61875227,62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022YFB2803203, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (62075238, 61875227); National Key Research and Development Program of China (2022YFB2803203).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 92>
Accession number:20222112133011
Title:Stimulated Raman scattering induced dark pulse and microcomb generation in the mid-infrared (Open Access)
Authors:Liu, Mulong (1); Huang, Huimin (2); Lu, Zhizhou (3); Zhou, Wenquan (1); Wang, Yuanyuan (1); Cai, Yanan (1); Zhao, Wei (4)
Author affiliation:(1) School of Science, Northwest A and F University, Yangling; 712100, China; (2) College of Information Engineering, Northwest A and F University, Yangling; 712100, China; (3) Chongqing United Microelectronics Center (CUMEC), Xiyuan South Street, Chongqing; 401332, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China
Corresponding authors:Huang, Huimin(huanghm@nwafu.edu.cn); Lu, Zhizhou(zhizhou.lu@cumec.cn)
Source title:New Journal of Physics
Abbreviated source title:New J. Phys.
Volume:24
Issue:5
Issue date:May 1, 2022
Publication year:2022
Article number:053003
Language:English
ISSN:13672630
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate that strong stimulated Raman scattering in silicon and germanium microresonators can induce stable and breathing dark pulses generation circumventing traditional complex approaches such as pump modulation and mode coupling. Although multi-photon absorption shows a small influence on the detuning value for stable dark pulse excitation, the concomitant free carrier will assist dark pulse excitation and broaden the excitation area of dark pulse thus making it easier to capture stable pulse. Furthermore, dark breather dynamics in Si and Ge are also observed, which shows distinct properties from the dark soliton breathers dominated solely by Kerr effect. Finally, we show that octave spanning mid-infrared (MIR) microcomb can be generated combining with high-order dispersion engineering, which in turn affects the breathing dynamics of dark pulses. Our findings provide another way for the initiation of dark pulses in group IV materials and broadband MIR microcomb generation for spectroscopy applications.<br/></div> © 2022 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
Number of references:51
Main heading:Stimulated Raman scattering
Controlled terms:Optical pumping - Nonlinear optics - Infrared devices - Multiphoton processes
Uncontrolled terms:Dark pulse - Germaniums (Ge) - Micro resonators - Microcombs - Midinfrared - Mode coupling - Multiphoton absorption - Pulse generation - Pulses excitation - Pump modulation
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 741.1.1 Nonlinear Optics
DOI:10.1088/1367-2630/ac6530
Funding details: Number: 52002331, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2452020264,2452021016, Acronym: -, Sponsor: Chinese Universities Scientific Fund;
Funding text:This work was supported by the Chinese Universities Scientific Fund (2452021016, 2452020264), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB24030600), National Natural Science Foundation of China (NSFC) (No. 52002331).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 93>
Accession number:20230413424266
Title:A compact killowatt-level QCW high-power semiconductor laser array based on dual-chip integration
Authors:Zhang, Pu (1, 2, 3); Ren, Wenzhen (2); Wang, Bo (2, 3); Zhu, Xiangping (1, 2); Yang, Junhong (1)
Author affiliation:(1) Key & Core Technology Innovation Institute of the Greater Bay Area, Building B3, No.11 kaiyuan Avenue, Huangpu District, Guangdong, Guangzhou; 510535, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District, Beijing; 100049, China
Corresponding author:Zhang, Pu
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12311
Part number:1 of 1
Issue title:Semiconductor Lasers and Applications XII
Issue date:2022
Publication year:2022
Article number:123110W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510656888
Document type:Conference article (CA)
Conference name:Semiconductor Lasers and Applications XII 2022
Conference date:December 5, 2022 - December 11, 2022
Conference location:Virtual, Online, China
Conference code:185712
Sponsor:Chinese Optical Society (COS); The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the increase of output power, more heat generation and higher operation current have become important issues, which affect the electrical-optical performance and reliability of high power semiconductor lasers. For the past several years, high power semiconductor laser chips utilizing double or triple quantum wells have been developed to achieve higher output power. However, the operation current of diode laser chips with double or triple quantum wells is much higher than that with single quantum well. Diode laser chips with double or triple quantum wells could only operate at a much lower duty cycle. In this paper, a compact quasi-continuous wave (QCW) high power semiconductor laser array based on dual-chip integration techniques has been developed. For this packaging structure, two diode laser bars were welded above and below a micro-channel heat sink, without significant increase in volume. By means of this integration method, the output power of the semiconductor laser could reach kilowatt-level at a lower operation current. The thermal behavior of the semiconductor laser array with different operation parameters was carried out using finite element method. The structure parameters of semiconductor laser array based on dual-chip integration were optimized and characterized. The output power is 1485 W operated at a current of 700 A and the maximum electro-optical efficiency is 75%, which is the record-high level for a high power semiconductor laser array.<br/></div> © 2022 SPIE.
Number of references:11
Main heading:Semiconductor quantum wells
Controlled terms:Chip scale packages - High power lasers - Integration - Power semiconductor diodes - Quantum well lasers
Uncontrolled terms:Chip integration - Double quantum-well - Dual-chip - High power semiconductor laser - Laser chips - Operation currents - Output power - Quasi-continuous waves - Semiconductor laser arrays - Triple-quantum wells
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 744.1 Lasers, General - 921.2 Calculus
Numerical data indexing:Electric current 7.00E+02A, Percentage 7.50E+01%, Power 1.485E+03W
DOI:10.1117/12.2643908
Funding details: Number: 2019B090917012, Acronym: -, Sponsor: -;Number: 62075237, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:We would like to acknowledge support from the Natural Science Foundation of China under Grant 62075237 and Guangdong Province Key R&D Program 2019B090917012.We would like to acknowledge support from the Natural Science Foundation of China under Grant 62075237 and
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 94>
Accession number:20222612296475
Title:Nonlinear localized modes in one-dimensional nanoscale dark-state optical lattices (Open Access)
Authors:Chen, Zhiming (1, 2, 3); Zeng, Jianhua (1, 4)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Science, East China University of Technology, Nanchang; 330013, China; (3) Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan; 250358, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Nanophotonics
Abbreviated source title:Nanophotonics
Volume:11
Issue:15
Issue date:August 1, 2022
Publication year:2022
Pages:3465-3474
Language:English
E-ISSN:21928614
Document type:Journal article (JA)
Publisher:De Gruyter Open Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Optical lattices (OLs) with conventional spatial periodic λ/2, formed by interfering the counterpropagating laser beams with wavelength λ, are versatile tools to study the dynamical and static properties of ultracold atoms. OLs with subwavelength spatial structure have been realized in recent quantum-gas experiment, offering new possibility for nonlinear and quantum control of ultracold atoms at the nano scale. Herein, we study theoretically and numerically the formation, property, and dynamics of matter-wave localized gap modes of Bose-Einstein condensates loaded in a one-dimensional nanoscale dark-state OL consisted of an array of optical subwavelength barriers. The nonlinear localized modes, in the forms of on- and off-site fundamental gap solitons, and dipole ones, are demonstrated; and we uncover that, counterintuitively, these modes exhibit always a cusplike (side peaks) mode even for a deeply subwavelength adiabatic lattice, contrary to the previously reported results in conventional deep OLs where the localized gap modes are highly confined in a single lattice cell. The (in)stability features of all the predicted localized modes are verified through the linear-stability analysis and direct perturbed simulations. Our predicted results are attainable in current ultracold atoms experiments with the cutting-edge technique, pushing the nonlinear control of ultracold atoms with short-period OLs as an enabling technology into subwavelength structures.<br/></div> © 2022 the author(s), published by De Gruyter, Berlin/Boston.
Number of references:61
Main heading:Bose-Einstein condensation
Controlled terms:Atoms - Crystal lattices - Linear stability analysis - Nanotechnology - Nonlinear optics - Optical lattices - Optical materials - Solitons - Statistical mechanics
Uncontrolled terms:Bose-Einstein-condensation - Dark state - Gap soliton - Nano scale - Nanoscale dark-state optical lattice - Nonlinear localized modes - One-dimensional - Sub-wavelength - Three-level atomic systems - Ultracold atoms
Classification code:741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems - 744.8 Laser Beam Interactions - 761 Nanotechnology - 921 Mathematics - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 933.1.1 Crystal Lattice
DOI:10.1515/nanoph-2022-0213
Funding details: Number: XAB2021YN18, Acronym: -, Sponsor: -;Number: 11704066,12074423,61690222,61690224, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 20202BABL211013, Acronym: -, Sponsor: Natural Science Foundation of Jiangxi Province;Number: GJJ180378, Acronym: -, Sponsor: Education Department of Jiangxi Province;
Funding text:Research funding: This work was supported by the National Natural Science Foundation of China (11704066, 61690224, 61690222, and 12074423), Jiangxi Provincial Natural Science Foundation (20202BABL211013), the Science and Technology Project of Department of Education of Jiangxi Province (GJJ180378), and Young Scholar of Chinese Academy of Sciences in western China (XAB2021YN18).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 95>
Accession number:20220711614367
Title:Sum-frequency generation of 133 mJ, 270 ps laser pulses at 266 nm in LBO crystals (Open Access)
Authors:Wang, Nan (1, 2, 3, 4); Zhang, Jingyuan (2, 3); Yu, Haijuan (2, 3); Lin, Xuechun (2, 3); Yang, Guowen (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Laboratory of All-solid-state Light Sources, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China; (3) Engineering Technology Research Center of All-Solid-State Lasers Advanced Manufacturing, Beijing; 100083, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:4
Issue date:February 14, 2022
Publication year:2022
Pages:5700-5708
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate the generation of high-energy (133 mJ) and sub-nanosecond (∼270 ps) deep ultraviolet (DUV) pulses at 266 nm by sum-frequency mixing in LiB3O5 (LBO) crystals. The highest 133 mJ pulse energy ever reported corresponds to a peak power of 0.49 GW and an energy conversion efficiency of 13.3% from the infrared at 1064 nm to DUV at 266 nm. This is the highest output energy ever reported for the DUV sub-nanosecond pulses to the best of our knowledge. Higher energy efficiency of 25.7% can be achieved from 1064 nm to 266 nm when the fundamental energy was reduced to 346 mJ. Furthermore, the DUV generations using LBO and typical β-BaB2O4 (BBO) crystals were compared regarding the energy efficiency, and the effects of the nonlinear absorption are discussed.<br/></div> © 2022 Optica Publishing Group.
Number of references:28
Main heading:Lithium compounds
Controlled terms:Interferometry - Crystals - Energy efficiency - Barium compounds - Energy conversion efficiency
Uncontrolled terms:1064 nm - Deep ultraviolet - Energy - Lib3o5 crystals - Peak power - Pulse energies - Subnanosecond - Sum frequency generation - Sum frequency mixing - Ultraviolet pulse
Classification code:525.2 Energy Conservation - 525.5 Energy Conversion Issues - 933.1 Crystalline Solids - 941.4 Optical Variables Measurements
Numerical data indexing:Power 4.90E+08W, Size 1.064E-06m, Size 1.064E-06m to 2.66E-07m, Size 2.66E-07m, Time 2.70E-10s, Energy 1.33E-01J, Energy 3.46E-01J, Percentage 1.33E+01%, Percentage 2.57E+01%
DOI:10.1364/OE.451262
Funding details: Number: 62175230,62175232, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: YJKYYQ20200001, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funding. Scientific Instrument Developing Project of the Chinese Academy of Sciences (YJKYYQ20200001); National Natural Science Foundation of China (62175230, 62175232).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 96>
Accession number:20220911734828
Title:Design of continuous zoom TV detection system in deep-sea
Authors:Peng, Jianwei (1); Zhang, Gaopeng (1); Chen, Weining (1); Dong, Sen (1); Yang, Hongtao (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China
Corresponding author:Peng, Jianwei(pengjianwei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121662A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to meet the needs of TV detection in deep sea environment, a compact continuous zoom system driven by cam sleeve is studied. Through the analysis of the system indicators, the optical system of three groups of linkage zoom and rear group for focusing is selected, and the structure of cylindrical cam driving to cooperate with the cylindrical guide sliding is clarified. Based on this idea, each module of the TV detection system is designed in detail. The design method of electric iris diaphragm in the middle of the system is proposed, and the calculation process and results of zoom drive mechanism selection are given. The method of alignment of lens optical axis adjustment with theodolite and cross-reticle is put forward. With this design and adjustment process, the TV detection system can be applied to deep sea environment is finally realized. The system has a continuously variable field of view with 5.8°∼60° underwater, the F number changes from 3.5 to 16, and the whole zoom time is less than 2s. The test results show that the MTF of the center field of view at the long focal point and the short focal point are 0.4 and 0.57. Test images in laboratory and underwater scene are clear and high resolution, which shows that the imaging quality of the system is excellent. At the same time, the system is Φ 105×115mm in actual size and 860g in weight, and can be integrated into the deep-sea pressure cabin to meet the needs of deep-sea detection.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:16
Main heading:Lenses
Controlled terms:Optical systems - Design - Cams
Uncontrolled terms:Continuous zooms - Deep sea - Design method - Detection system - Field of views - Focal points - Sea environments - System indicators - Systems-driven - Zoom systems
Classification code:601.3 Mechanisms - 741.3 Optical Devices and Systems
Numerical data indexing:Mass 8.60E-01kg, Size 1.15E-01m, Time 2.00E+00s
DOI:10.1117/12.2614623
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 97>
Accession number:20221712010201
Title:Ultrafast dynamic RF-spectrum investigation of soliton microcombs (Open Access)
Authors:Hu, Hao (1); Wang, Ruolan (1); Wang, Weiqiang (2, 3); Chen, Liao (1); Zhao, Yanjing (1); Wang, Xinyu (2, 3); Zhang, Chi (1, 4); Zhang, Wenfu (2, 3); Zhang, Xinliang (1, 4)
Author affiliation:(1) Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Optics Valley Laboratory, Wuhan; 430074, China
Corresponding authors:Chen, Liao(liaochenchina@hust.edu.cn); Zhang, Wenfu(wfuzhang@opt.ac.cn)
Source title:APL Photonics
Abbreviated source title:APL Photonics
Volume:7
Issue:4
Issue date:April 1, 2022
Publication year:2022
Article number:046104
Language:English
E-ISSN:23780967
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Dissipative Kerr solitons in microcavity systems exhibit remarkable nonlinear dynamics. The real-time measurement of soliton motion facilitates the comprehensive understanding of soliton physics. In this Letter, an all-optical radio frequency (RF) spectrum analyzer (named f-LISA) is used to characterize various stable soliton states and to track relative soliton motion in real time. By applying an inverse Fourier transform to the broadband RF spectrum, the autocorrelation traces are obtained with a temporal resolution of 373 fs and an ultrahigh frame rate of 20.6 MHz. We successfully characterize not only the stable single soliton state but also the stable multi-soliton states with different azimuthal angles between adjacent solitons. Furthermore, the dynamics of soliton switching from four-soliton state to single soliton state is observed in a temporal window of 60 μs. It is believed that the proposed scheme provides an alternative way to visualize the multi-soliton trajectories and enable the study of the soliton dynamics in integrated microcavities.<br/></div> © 2022 Author(s).
Number of references:40
Main heading:Solitons
Controlled terms:Dynamics - Microcavities - Spectrum analyzers
Uncontrolled terms:All optical - Kerr solitons - Measurements of - Microcombs - Multi solitons - Radio frequency spectrum - Real time measurements - Real- time - Single soliton - Ultra-fast dynamics
Classification code:714 Electronic Components and Tubes
Numerical data indexing:Frequency 2.06E+07Hz, Time 3.73E-13s, Time 6.00E-05s
DOI:10.1063/5.0084279
Funding details: Number: 61735006,61927817,62005090, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors gratefully acknowledge the Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), for device fabrication. This work was supported by the National Science Foundation of China (NSFC; Grant Nos. 61927817, 62005090, and 61735006).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 98>
Accession number:20220299011
Title:Mid-Infrared Graphene/Silicon-Based Electro-Optic Phase Modulator
Authors:Ban, Xiaoqiang (1, 2, 3); Dong, Bo (1); Chen, Zongyu (1); Huang, Wobin (1); Zhong, Ming (4); Little, Brent E. (2, 3)
Author affiliation:(1) College of Integrated Circuits and Optoelectronic Chips, Shenzhen Technology University, Shenzhen; 518118, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'An; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi’an; 710119, China
Corresponding author:Dong, Bo(dongbo@sztu.edu.cn)
Source title:SSRN
Issue date:July 25, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">Electro-optic modulator plays an important role in optical signal processing. We demonstrated a low loss graphene/silicon-waveguide-based electro-optic phase modulator. The results demonstrate that the modulation efficiency increases when increasing the graphene layer and modulating length in mid-infrared region. Its 3 dB bandwidth (41.2 GHz) does not depend on the graphene modulating length. The two-layer graphene/silicon waveguide modulator can reach π phase shift with minimum insertion loss (0.05 dB) when the modulation length is 400 μm. This work is useful for designing a high-performance phase modulator.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:37
Main heading:Graphene
Controlled terms:Infrared devices - Light modulation - Light modulators - Phase modulation - Silicon - Waveguides
Uncontrolled terms:Efficiency increase - Electro-optic modulators - Electrooptic phase modulator - Low-loss - Midinfrared - Modulation efficiency - Optical signal-processing - Phase modulator - Silicon waveguide - Silicon-based
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.3 Waveguides - 741.1 Light/Optics - 761 Nanotechnology - 804 Chemical Products Generally
Numerical data indexing:Decibel 3.00E+00dB, Decibel 5.00E-02dB, Frequency 4.12E+10Hz, Size 4.00E-04m
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4171618
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 99>
Accession number:20220911734806
Title:Athermalization design of compact dual-fields middle infrared optical zoom system with high-speed switching
Authors:Mei, Chao (1); Fei, Jia-Qi (1); Ma, Ying-Jun (1); Zhang, Hong-Wei (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Corresponding author:Mei, Chao
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121661N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Mid-wave infrared imaging has the advantages of all day, high resolution, strong adaptability to the environment, so it is widely used. In high-speed target tracking and aiming. The target flying speed is extremely fast and the DOF (depth of field) of the fixed focal lens is limited, so the zoom lens is required. In order to ensure that the tracking target will not be lost, a fast zoom requirement of no more than 0.3s is proposed. According to the requirements, a compact athermalized mid-wave infrared dual field fast zoom lens is designed. The focal length is 400 mm and 200 mm, and the passive athermalization design is adopted which can meet the working temperature of-40° to + 60°. the lens can match the cooling detector with effective pixel of 640 × 512, size of 15 μm and F/4.The volume of the detector can be controlled in the range of L (196mm) × w (116mm) × H (185mm). The zoom group structure is considered in the design, and the switching time is less than 0.12s, and the image plane is stable when the zoom group switching.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Optical design
Controlled terms:Target tracking - Infrared radiation - Thermography (imaging)
Uncontrolled terms:Athermalization - Depth of field - Dual-field - High resolution - High-speed switching - High-speed target tracking - Middle infrared - Midinfrared - Optical zoom systems - Zoom lens
Classification code:741.1 Light/Optics - 742.1 Photography
Numerical data indexing:Capacitance 1.50E+01F, Size 1.16E-01m, Size 1.85E-01m, Size 1.96E-01m, Size 2.00E-01m, Size 4.00E-01m, Time 1.20E-01s, Time 3.00E-01s
DOI:10.1117/12.2612267
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 100>
Accession number:20221611967368
Title:Research on distributed space objects detection technology based on optical fiber image bundles
Authors:Wang, Huawei (1); Ma, Yingjun (1); Liao, Jiawen (1); Gao, Bo (1); Fang, Yao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Shaanxi, Xi'an; 710119, China
Corresponding author:Wang, Huawei(whw@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:1216979
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the rapid increase of the number of spacecrafts, the space environment is becoming more and more complex. The demand of spacecraft for omni-directional detection of surrounding objects is becoming more and more urgent. This paper introduces a distributed space objects detection technology based on optical fiber image bundles. The system adopts multi aperture optical system. The optical signal is transmitted to the high-sensitivity image sensor through the fiber image bundle for imaging. Compared with the traditional method, the multi aperture optical system using fiber image bundles can be flexibly arranged according to the needs. The system has the advantages of wide field of view, flexible layout and low cost. This paper introduces the relevant technologies used and the principle prototype developed.<br/></div> © 2022 SPIE
Number of references:5
Main heading:Object detection
Controlled terms:Lenses - Optical fibers - Optical systems
Uncontrolled terms:Detection technology - Fiber image bundles - Multi aperture - Objects detection - Omni-directional - Optical fiber image bundle - Optical lens - Space environment - Space objects - Technology-based
Classification code:723.2 Data Processing and Image Processing - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2624984
Funding text:The authors would like to thank all the collaborators who have made contributions to this paper in the prototype development process, including optical fiber image bundles processing, fiber plate coupling, testing, etc.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 101>
Accession number:20223512639069
Title:Period-timing bifurcation evolution in a nonlinear polarization rotation fiber laser
Authors:Ban, Xiaoqiang (1, 2); Li, Xiaohui (3); Dong, Bo (4); Huang, Wobin (4); Zhong, Ming (5); Little, Brent E. (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (4) College of Integrated Circuits and Optoelectronic Chips, Shenzhen Technology University, Shenzhen; 518118, China; (5) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:268
Issue date:October 2022
Publication year:2022
Article number:169870
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Period-timing bifurcation phenomenon widely exists in fiber laser. We investigate the period-timing bifurcation phenomenon in fiber resonator. Large period-timing of single pulse occurs due to mutual competition between dispersive wave and soliton. In addition, period-timing of soliton molecule is observed due to mutual attraction and repulsion between adjacent pulses. Furthermore, local periodic bifurcation has been obtained. All the period-timing bifurcation phenomena are related to many factors such as fiber birefringence, small signal gain, nonlinear effect and dispersion, etc. Exploring period-timing bifurcation is helpful to understand the dynamic evolution of pulse. Period-timing bifurcation has important applications in optical communication system, optical logic operation, all-optical computing and so on.<br/></div> © 2022 Elsevier GmbH
Number of references:42
Main heading:Fiber lasers
Controlled terms:Bifurcation (mathematics) - Computation theory - Dispersion (waves) - Fibers - Molecules - Nonlinear optics - Optical communication - Optical data processing - Resonators - Solitons - Timing circuits
Uncontrolled terms:Bifurcation phenomena - Fiber-resonator - In-fiber - Nonlinear polarization rotation - Passive fiber resonator - Passive fibers - Period-timing bifurcation - Phase delay - Small signal gain - Soliton molecules
Classification code:713.4 Pulse Circuits - 717.1 Optical Communication Systems - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.2 Data Processing and Image Processing - 741.1.1 Nonlinear Optics - 744.4 Solid State Lasers - 931.3 Atomic and Molecular Physics
DOI:10.1016/j.ijleo.2022.169870
Funding details: Number: 2022A1515010841, Acronym: -, Sponsor: -;Number: SZWD2021006, Acronym: -, Sponsor: -;Number: 2018KZDXM077, Acronym: -, Sponsor: -;Number: 2020KCXTD029, Acronym: -, Sponsor: -;Number: GDRC202103, Acronym: -, Sponsor: -;Number: SGDX20201103009520303, Acronym: -, Sponsor: -;Number: 2021ZDZX1013, Acronym: -, Sponsor: -;Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:The work is supported by strategic pilot project (class B) of Chinese Academy of Sciences (Grant no. XDB24030300 ), General Project of Shenzhen University Stability Support Plan ( SZWD2021006 ), Guangdong University Innovation Team Project (Natural Science) ( 2020KCXTD029 ), Special Projects in Key Fields of Colleges and Universities of Guangdong Province ( 2021ZDZX1013 ), Basic and Applied Basic Research Foundation of Guangdong Province Natural Science Foundation ( 2022A1515010841 ), Shenzhen, Hong Kong and Macao Science and Technology Plan (Class C) ( SGDX20201103009520303 ), Natural Science Foundation of Top Talent of SZTU ( GDRC202103 ) and Guangdong Provincial Major Scientific Research Grant ( 2018KZDXM077 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 102>
Accession number:20215211398418
Title:All-Optical Tunable Fiber Filter With Dual Graphene Films Enabled by a Fiber Open Microcavity (Open Access)
Authors:Li, Yang (1); Dong, Bo (2); Chen, Enqing (3); Li, Ziwan (1, 3, 4)
Author affiliation:(1) Key Laboratory of Aperture Array and Space Application, 38th Research Institute, China Electronics Technology Group Corporation, HeFei, China; (2) College of new materials and new energies, Shenzhen Technology University, Shenzhen, China; (3) University of Chinese Academy of Sciences, Beijing, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Dong, Bo(dbo1978@163.com)
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:40
Issue:7
Issue date:April 1, 2022
Publication year:2022
Pages:2111-2115
Language:English
ISSN:07338724
E-ISSN:15582213
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">An all-optical tunable fiber filter with dual graphene films enabled by a fiber open microcavity. The graphene films are deposited on the fiber end surfaces via the light induced thermophoresis effect. Two fiber end surfaces deposited with the graphene films are used to construct the microcavity. Under an additional 980-nm optical pump, the filter experiences stronger optical Kerr effect and photothermal effect since the light propagates to the dual graphene films repeatedly. Experimental results show that its all-optical tunable wavelength range can reach 8.295 nm within the optical pump power range of 0∼80 mW, and it is almost 23.8 times of the reported all-optical tunable Fabry-Perot filter.<br/></div> © 2022 IEEE.
Number of references:13
Main heading:Surface treatment
Controlled terms:Bandpass filters - Optical filters - Optical pumping - Optical fibers - Graphene - Fabry-Perot interferometers - Metallic films - Optical fiber communication - Optical films - Microcavities - Pumps - Optical Kerr effect
Uncontrolled terms:A.Fibres - All optical - All-optical tunable fiber filter; - Fiber open microcavity - Graphene film; - Graphene films - Optical fiber filters - Optical reflection - Optical-fiber communication - Tunable fiber filter
Classification code:618.2 Pumps - 703.2 Electric Filters - 714 Electronic Components and Tubes - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally - 941.3 Optical Instruments
Numerical data indexing:Power 0.00E00W to 8.00E-02W, Size 8.295E-09m, Size 9.80E-07m
DOI:10.1109/JLT.2021.3135314
Funding details: Number: SZWD2021006, Acronym: -, Sponsor: -;Number: 20210712433B, Acronym: -, Sponsor: -;Number: 2021ZDZX1013, Acronym: -, Sponsor: -;
Funding text:This work was supported in part by the General Project of Shenzhen University Stable Support Program under Grant SZWD2021006, in part by the Special Project for Key Fields of Colleges and Universities in Guangdong under Grant 2021ZDZX1013, in part by the Guangdong Basic and Applied Basic Research Foundation, Peacock Project under Grant 20210712433B, and in part by the Natural Science Foundation of Top Talent of SZTU.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 103>
Accession number:20222112157725
Title:Double-functionalization of water repellence and anti-reflectance by multiple-laser-based fabrication of triple-scale hierarchical surface structures (Open Access)
Authors:He, Jianguo (1, 2, 3); Li, Ming (4); Dai, Shoujun (1, 2); Huang, Min (1, 3); Liu, Yang (1, 3); Li, Yang (1, 3); Fan, Lianwen (5); Yu, Jin (1, 2)
Author affiliation:(1) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing; 100094, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (5) Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing; 100094, China
Corresponding author:Yu, Jin(jinyu@aoe.ac.cn)
Source title:Materials and Design
Abbreviated source title:Mater. Des.
Volume:219
Issue date:July 2022
Publication year:2022
Article number:110734
Language:English
ISSN:02641275
E-ISSN:18734197
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">A novel strategy of laser ablation followed by tungsten-based pulsed laser deposition was proposed and experimentally verified for available surface functionalization with superhydrophobicity and anti-reflectance on 316L stainless steel. Three surface patterns, crater, parallel lines (PL), and grid, were manufactured by nanosecond laser ablation, while the surface morphology was controlled by the transverse traverse index. After the pulsed laser deposition treatment, tungsten particles and clusters were densely coated on the laser-ablated surfaces. The fabricated substrates were characterized by triple-scaled hierarchical structures having different patterns, corrugated structures, and broccoli-like nano-protrusions. An aging treatment was performed to improve wettability. The results verified that the proposed multiple laser treatments in combination with the aging treatment allow the quick implementation of superhydrophobicity while maintaining good reflectance over the spectral range. Moreover, the topology was characterized using an optical profiler and through scanning electron microscopy, while a video-based optical contact angle measuring device and spectrophotometer were used to measure the contact angle and optical reflectance, respectively. X-ray photoelectron spectroscopy was performed to analyze the chemical components. This method can prepare water-repellent anti-reflectance hybrid substrates for industrial and academic applications.<br/></div> © 2022 The Authors
Number of references:36
Main heading:Contact angle
Controlled terms:Austenitic stainless steel - Chemical analysis - Fabrication - Hydrophobicity - Laser ablation - Morphology - Pulsed laser deposition - Pulsed lasers - Reflection - Scanning electron microscopy - Surface morphology - X ray photoelectron spectroscopy
Uncontrolled terms:316 L stainless steel - Ageing treatments - Anti-reflectance - Functionalizations - Laser-based fabrication - Multiple lasers - Nanosecond laser ablation - Pulsed-laser deposition - Superhydrophobicity - Water repellence
Classification code:545.3 Steel - 641.2 Heat Transfer - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Numerical data indexing:Volume 3.16E-01m3
DOI:10.1016/j.matdes.2022.110734
Funding details: Number: XDA17040501, Acronym: -, Sponsor: -;Number: YJKYYQ20170035,YJKYYQ20200047, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2019ZDLGY01-04, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work was supported by the Strategic Priority Research Program of China Academy of Sciences (XDA17040501), the Instrument Developing Project of the Chinese Academy of Sciences (YJKYYQ20170035, YJKYYQ20200047) and the Shaanxi Provincial Key Research and Development Program (2019ZDLGY01-04).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 104>
Accession number:20220911734842
Title:Study on assembly process of flexible support mirror based on adhesive technology
Authors:Wang, Peng (1); Kang, Shi-Fa (1); Zheng, Xiang-Ke (1); Geng, Bo (1); Wang, Wei (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Peng
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121662P
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the assembly of space camera, the assembly of large aperture mirror is the key of the system assembly. In this paper, the flexible supported mirror of space camera is taken as the research object, and a process route is proposed to complete the micro-stress assembly of the mirror and the transmission from optical datum to mechanical datum at one time by taking the adhesive assembly of the mirror and the transmission from optical datum to mechanical datum into consideration. According to this process route, the assembly process design and installation platform construction are completed. In addition, the factors affecting the micro-stress assembly of the mirror are analyzed theoretically and experimentally, and the transfer accuracy of the optical-mechanical reference is analyzed. This process method has been successfully applied to the assembly of a space camera's primary mirror. After the assembly, the shape of the primary mirror RMS is less than λ/50, and the Angle between the optical axis and the normal of the structure's mounting surface is less than 10". The process method presented in this paper provides a technical reference for the assembly of similar optical-mechanical systems.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:3
Main heading:Assembly
Controlled terms:Adhesives - Mirrors - Cameras - Light transmission
Uncontrolled terms:Adhesive technology - Bipod flexible support - Flexible supports - Mechanical - Micro-stress assembly - Optical- - Optical-mechanical reference transfer - Process route - Reference transfer - Space cameras
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment
DOI:10.1117/12.2615620
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 105>
Accession number:20221411918831
Title:Measurement for far-field focal spot of high power laser based on the diffraction inversion of sidelobe beam
Title of translation:基于旁瓣光束衍射反演的强激光远场焦斑测量方法
Authors:Wang, Zhengzhou (1); Wang, Li (1); Wei, Jitong (1); Wang, Wei (1); Li, Gang (1); Yi, Dongchi (1); Wang, Yajun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Zhengzhou(azhou_china@126.com)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:30
Issue:4
Issue date:February 25, 2022
Publication year:2022
Pages:380-402
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In order to solve the problem that the schlieren method cannot accurately measure the weak signal region of the sidelobe beam in large laser devices of the national large scientific facility, a new schlieren method based on the diffraction inversion of the sidelobe beam is proposed to measure the far-field focal spot for high-power laser. The key point of this method is that an indirect measurement approach is used based on reverse deduction, while deducting along the reverse direction of the optical path propagation. The diffraction intensity image and phase image of the sidelobe beam are the inputs to calculate the far-field focal spot distribution of the front sidelobe beam, which is not shielded. Compared with the traditional far-field focal spot measurement based on the schlieren method, the improvements and optimizations proposed in this paper are as follows. First, the mathematical model of far-field focal spot measurement using the schlieren method is improved to reveal the rationality of the model, theoretically based on the principle of diffraction inversion of the sidelobe beam and the indirect measurement approach. Then, the feasibility of this method is verified by simulating the whole experimental process of high power laser far-field focal spot measurement, which consists of sidelobe beam diffraction, denoising, sidelobe beam diffraction inversion, and focal spot reconstruction. Finally, the improved DnCNN algorithm is used to remove the noise of different levels (0-75 dB) of 12 bit scientific CCD images in the mainlobe and sidelobe beams, and the reconstruction accuracy of far-field focal spot is improved. The experimental results show that this method not only eliminates the influence of the schlieren sphere on the diffraction of the sidelobe beam but also obtains the real intensity distribution of the sidelobe beam in the weak signal region, including the important parameters of far-field focal spot measurement, such as the amplitude and position of each peak of the side lobe beam, the dynamic range ratio, the amplitude and position of each peak of the sidelobe beam, and the ratio of dynamic range. The error between the reconstructed and theoretical focal spots of the dynamic range ratio is 3.20%. It is significant to improve the reliability and experimental accuracy of the far-field focal spot of high-power laser measurement using the schlieren method.<br/></div> © 2022, Science Press. All right reserved.
Number of references:20
Main heading:High power lasers
Controlled terms:Image enhancement - Diffraction
Uncontrolled terms:De-noising - DnCNN denoising - Far-field focal spots - Focal-spot - High-power lasers - Measurement for far-field focal spot - Reconstruction of focal spot - Schlieren method - Side lobes - Sidelobe diffraction inversion
Classification code:744.1 Lasers, General
Numerical data indexing:Decibel 0.00E00dB to 7.50E+01dB, Percentage 3.20E+00%
DOI:10.37188/OPE.20223004.0380
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 106>
Accession number:20221311851072
Title:Alleviation of honeycomb print-through of NiP/Cu coated carbon fiber composite mirror via robot-arm wheel polishing
Authors:Wang, Yong-jie (1); Yao, Yong-sheng (1); Xu, Liang (1); Wu, Xiao-ge (1); Shen, Le (1); sun, Guo-yan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, China Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Yong-jie(wangyongjie@opt.ac.cn)
Source title:Materials Chemistry and Physics
Abbreviated source title:Mater Chem Phys
Volume:283
Issue date:May 1, 2022
Publication year:2022
Article number:126028
Language:English
ISSN:02540584
CODEN:MCHPDR
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In order to realize higher lightweight rate, CFRP (Carbon Fiber Reinforced Polymer) composites were applied to fabricate mirror. A NiP coating was prepared on the surface, meanwhile honeycomb print through was discussed in the paper. Before NiP alloy coating plating, a Cu film was prepared through magnetron sputtering to reinforce the adherence with CFRP mirror. The NiP coating contained 10.9% P and exhibited an amorphous structure. Obvious "honeycomb print-through" was found in the classical polish, the final surface accuracy was just 0.048λ (RMS, λ = 632.8 nm). However, the print-through can be alleviated through Robot-arm wheel polishing. 0.015λ (RMS) of surface accuracy was realized on a Ф100mm CFRP mirror.<br/></div> © 2022
Number of references:32
Main heading:Mirrors
Controlled terms:Polishing - Carbon fiber reinforced plastics - Plastic coatings - Honeycomb structures - Wheels
Uncontrolled terms:Alloy coatings - Carbon fiber reinforced polymer composite - Carbon fibre composites - Carbon fibre reinforced polymer - Composite mirrors - Honeycomb print through - Lightweight mirrors - NiP alloy coating - Robot arms - Surface accuracy
Classification code:408.2 Structural Members and Shapes - 601.2 Machine Components - 604.2 Machining Operations - 741.3 Optical Devices and Systems - 813.2 Coating Materials - 817.1 Polymer Products - 817.2 Polymer Applications
Numerical data indexing:Percentage 1.09E+01%, Size 6.328E-07m
DOI:10.1016/j.matchemphys.2022.126028
Funding details: Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) [grant number 52105493 ] and the China Postdoctoral Science Foundation [grant number 4139ZRY4 ].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 107>
Accession number:20221611967502
Title:Optical design of three-line array airborne mapping camera with large field of view and high resolution
Authors:Yan, Aqi (1); Dongsen (1); Zhang, Jian (1); Wu, Dengshan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yan, Aqi(1yanaqi@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:121690Z
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In view of urgent demand high resolution and large field of view on three-line array airborne mapping camera, the paper proposes an airborne mapping camera optical system with large field of view and high resolution, which consists of single telecentric lens, RGB multispectral prism and field splicing prism. In order to solve RGB multispectral splitting problem in system, a new multispectral splitting prism based on a close distance confocal plane linear array sensor is proposed, which successfully solves RGB multispectral splitting problem of confocal plane linear array sensor with a close distance (B band and G band are only 4 pixels apart, and G band and R band are 2.2mm apart). The telecentric optical system is designed, focal length is 130mm, field of view (FOV) is 77°(working field of view is 60°), and image elecentricity is less than 0.1°across full field of view. There are four multispectral bands which are panchromatic?R?G?B band. The optical system has excellent imaging quality and compact structure.<br/></div> © 2022 SPIE
Number of references:9
Main heading:Prisms
Controlled terms:Antenna arrays - Stereo image processing - Optical design - Cameras - Lenses - Mapping - Optical systems - Imaging systems
Uncontrolled terms:Aerial camera - Airborne mapping - Field of views - High resolution - Large field of views - Linear-array - Mapping camera - Multi-spectral - Stereo mapping - Three linear array aerial camera
Classification code:405.3 Surveying - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 746 Imaging Techniques
Numerical data indexing:Size 1.30E-01m, Size 2.20E-03m
DOI:10.1117/12.2620934
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 108>
Accession number:20220911734820
Title:Optical design of monocentric multiscale three-line array airborne mapping camera
Authors:Yan, Aqi (1); Dong, Sen (1); Wu, Dengshan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yan, Aqi(yanaqi@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:1216621
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In view of the urgent demand high resolution and large field of view on three-line array airborne mapping camera, the paper proposes a new idea which applies monocentric multiscale principle to three-line array airborne mapping camera with high resolution and large field of view (FOV), and gives the design method and design process of optical system. monocentric multiscale optical system is designed, focal length is 70mm, resolution is 0.1m@2Km, and there are four multispectral bands which are panchromaticRGB band. The Base to Height ratio (B/H) is 0.83. The FOV of monocentric multiscale optical system is 80°, and working FOV is 60° which can be extended to 105°. The optical system has excellent imaging quality and successfully solved contradiction between large FOV and high resolution.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:13
Main heading:Optical design
Controlled terms:Cameras - Optical systems - Antenna arrays - Imaging systems - Mapping - Stereo image processing
Uncontrolled terms:Aerial camera - High resolution - Large field of views - Line arrays - Linear-array - Monocentric - Monocentric multiscale imaging - Multi-scale imaging - Stereo mapping - Three linear array aerial camera
Classification code:405.3 Surveying - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 746 Imaging Techniques
Numerical data indexing:Size 1.00E-01m, Size 7.00E-02m
DOI:10.1117/12.2613976
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 109>
Accession number:20223012391073
Title:Thermal analysis method of optical scanning system drive shaft system (Open Access)
Authors:Weining, Chen (1, 2); Gong, Cheng (1); Sansan, Chang (2); Bo, Gao (2); Xiang, Li (2)
Author affiliation:(1) Northwestern Polytechnical University, Xi'an; 710072, China; (2) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China
Corresponding author:Weining, Chen(chenweining501@163.com)
Source title:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2295
Part number:1 of 1
Issue:1
Issue date:2022
Publication year:2022
Article number:012003
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:5th International Conference on Circuits, Systems and Devices, ICCSD 2021
Conference date:October 30, 2021 - November 2, 2021
Conference location:Chengdu, China
Conference code:180563
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the heating problem of the rotating shaft components of the optical surveillance scanning system due to continuous operation, the feasibility of applying the oil-air lubrication technology to the drive shaft system of the optical surveillance scanning system was studied. Analyzed the contact load of the spindle bearing, obtained the calorific value of the heat source of the spindle component of the drive system, established the finite element analysis model of the temperature field of the spindle component, and calculated the thermal stability of the spindle component under the conditions of no lubrication and lubrication. Temperature rise. It is proposed to apply the oil-air lubrication method to the drive shaft system of the optical monitoring scanning system, and the corresponding lubrication parameters are calculated.<br/></div> © Published under licence by IOP Publishing Ltd.
Number of references:10
Main heading:Thermoanalysis
Controlled terms:Imaging systems - Lubrication - Monitoring - Scanning - Thermodynamic stability
Uncontrolled terms:Analysis method - Lubrication / - Oil-air lubrication - Optical scanning systems - Optical- - Rotating shaft - Shaft system - Spindle components - Surveillance scanning
Classification code:607.2 Lubrication - 641.1 Thermodynamics - 746 Imaging Techniques - 801 Chemistry
DOI:10.1088/1742-6596/2295/1/012003
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 110>
Accession number:20214010982963
Title:High-power and high-efficiency 4.3 μm ZGP-OPO (Open Access)
Authors:Wang, Feifei (1); Li, Jiatong (1); Sun, Xiaohui (1); Yan, Bingzheng (1); Nie, Hongkun (1); Li, Xun (4); Yang, Kejian (1, 2); Zhang, Baitao (1, 2); He, Jingliang (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan; 250100, China; (2) Key Laboratory of Laser and Infrared System, Ministry of Education, Shandong University, Qingdao; 266237, China; (3) Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan; 250358, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Corresponding authors:Nie, Hongkun(hknie@sdu.edu.cn); Zhang, Baitao(btzhang@sdu.edu.cn)
Source title:Chinese Optics Letters
Abbreviated source title:Chin. Opt. Lett.
Volume:20
Issue:1
Issue date:January 10, 2022
Publication year:2022
Article number:011403
Language:English
ISSN:16717694
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a high-power and high-efficiency 4.3 μm mid-infrared (MIR) optical parametric oscillator (OPO) based on ZnGeP2 (ZGP) crystal is demonstrated. An acousto-optically Q-switched Ho: Y3Al5O12 laser operating at 2.1 μm with amaximum average output power of 35Wand pulse width of 38 ns at a repetition rate of 15 kHz is established and employed as the pump source. A doubly resonant OPO is designed and realized with the total MIR output power of 13.27 W, including the signal and idler output power of 2.65 W at 4.07 μm and 10.62 W at 4.3 μm. The corresponding total optical-to-optical and slope efficiencies are 37.9% and 67.1%, respectively. The shortest pulse width, beam quality factor, and output power instability are measured to be 36 ns, M2x = 1.8, M2y = 2.0, and RMS < 1.9% at 8 h, respectively. Our results pave a way for designing high-power and high-efficiency 4-5 μm MIR laser sources.<br/></div> © 2022 Chinese Optics Letters.
Number of references:23
Main heading:Optical parametric oscillators
Controlled terms:Infrared devices - Optical pumping - Zinc compounds - Aluminum compounds - Efficiency - Germanium compounds - Optically pumped lasers - Pulse repetition rate
Uncontrolled terms:Acousto-optically Q-switched - Average output power - High power efficiencies - Higher efficiency - Infrared-laser - Mid-infrared laser - Midinfrared - Nonlinearity - Output power - Zngep2 crystals
Classification code:744.1 Lasers, General - 913.1 Production Engineering
Numerical data indexing:Frequency 1.50E+04Hz, Percentage 1.90E+00%, Percentage 3.79E+01%, Percentage 6.71E+01%, Power 1.062E+01W, Power 1.327E+01W, Power 2.65E+00W, Size 2.10E-06m, Size 4.00E-06m to 5.00E-06m, Size 4.07E-06m, Size 4.30E-06m, Time 2.88E+04s, Time 3.60E-08s, Time 3.80E-08s
DOI:10.3788/COL202220.011403
Funding details: Number: S2019-YF-ZDCXL-ZDLGY-0253, Acronym: -, Sponsor: -;Number: 61975095, Acronym: -, Sponsor: -;Number: 2020QNQT, Acronym: SDU, Sponsor: Shandong University;Number: 2017YFB0405204, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2019JZZY020206, Acronym: -, Sponsor: Major Scientific and Technological Innovation Project of Shandong Province;
Funding text:This work was supported by the National Key Research and Development Program of China (No. 2017YFB0405204), National Research Foundation of China (No. 61975095), Youth Cross Innovation Group of Shandong University (No. 2020QNQT), Development Program of Shaanxi Province (No. S2019-YF-ZDCXL-ZDLGY-0253), Major Science and Technology Innovation Project of Shandong Province (No. 2019JZZY020206), and Qilu Young Scholar of Shandong University.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 111>
Accession number:20223712704774
Title:Experimental demonstration of an improved control design and algorithm for optical communication terminal with disturbance (Open Access)
Authors:Guo, Huinan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Source title:Optik
Abbreviated source title:Optik
Volume:269
Issue date:November 2022
Publication year:2022
Article number:169939
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Objective: Vibration interference causes the misalignment between the incident beam and the optical axis of the opto-mechanical terminal system, which also can significantly affect the control stability and reduce the system precision. To better improve the resilience of disturbance and the steady-state accuracy, Methods: a novel robustness servo design and disturbance rejection algorithm with iterative learning control for tracking error calibration is proposed. The availability of this system design has been proved from a dynamic tracking experiment, the operating modes are based on different disturbance conditions. Result: The experiment itself focused on the algorithm implementation and tracking stability based on the optical communication terminal assembly. The obtained steady-state response performance during the adjustment process indicates that the tracking errors are below 1.3 μrad. The improved control design and algorithm implementation shows a better disturbance rejection ability. The new approach is also beneficial for the optical communication field.<br/></div> © 2022 The Authors
Number of references:23
Main heading:Iterative methods
Controlled terms:Design - Disturbance rejection - Learning algorithms - Optical communication
Uncontrolled terms:Algorithm implementation - Control analysis - Control design - Experimental demonstrations - Improved controls - Iterative learning control - Optical communications terminals - Precision tracking - Terminal assembly - Tracking errors
Classification code:717.1 Optical Communication Systems - 723.4.2 Machine Learning - 731 Automatic Control Principles and Applications - 921.6 Numerical Methods
DOI:10.1016/j.ijleo.2022.169939
Funding details: Number: 61905023, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 20200201010JC, Acronym: -, Sponsor: Department of Science and Technology of Jilin Province;
Funding text:This work is supported by the Department of Science and Technology of Jilin Province (Project No. 20200201010JC ), also including National Natural Science Foundation of China (Grant No. 61905023 ), authors would like to express our grateful for providing financial support on this study. The authors also would like to thank each experimental member of project team for their valuable suggestions.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
<RECORD 112>
Accession number:20220711631533
Title:Efficient dispersion engineering for three-octave-spanning supercontinuum generation in nanophotonic waveguides
Authors:Liu, Mulong (1); Gu, Chengwei (2); Fan, Xuening (1); Li, Zhiheng (1); Huang, Huimin (3); Lu, Zhizhou (4); Zhao, Wei (5)
Author affiliation:(1) School of Science, Northwest A&F University, Yangling; 712100, China; (2) School of Information Science & Engineering, Lanzhou University, Gansu, Lanzhou; 730000, China; (3) College of Information Engineering, Northwest A&F University, Yangling; 712100, China; (4) Chongqing United Microelectronics Center (CUMEC), Xiyuan South Street, Chongqing; 401332, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China
Corresponding author:Gu, Chengwei(guchw18@lzu.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:150
Issue date:June 2022
Publication year:2022
Article number:107923
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a dispersion-flattened technology for producing broadband and low anomalous dispersion with minimal zero-dispersion wavelengths (ZDWs). This structure can be formed by nanophotonic waveguides using different material combinations. Flat dispersion varying between 0 and 27 ps/nm/km and spanning a range of wavelengths between 1290 and 4570 nm can be achieved. Without applying dispersion hybridization and using complex material combinations, dispersion demonstrates good tolerance to pump wavelength selection and is easier to introduce. Furthermore, the designed structures are applied to generate a supercontinuum over three octaves considering wavelength dependent loss from cladding, which exhibits an excellent bandwidth of − 40 dB even with increasing losses from the waveguide material or structure generation. These findings are useful for supercontinuum generation over multiple octaves in different platforms, which is promising for self-referenced f-2f systems and spectroscopy applications.<br/></div> © 2022 Elsevier Ltd
Number of references:42
Main heading:Supercontinuum generation
Controlled terms:Nanophotonics - Waveguides
Uncontrolled terms:Anomalous dispersion - Complex materials - Dispersion engineering - Flat dispersion - Hybridisation - Integrated waveguides - Material combination - Nanophotonic waveguides - Super continuum - Zero-dispersion wavelength
Classification code:714.3 Waveguides - 741.1 Light/Optics - 741.1.1 Nonlinear Optics
Numerical data indexing:Time 0.00E00s to 2.70E-11s, Decibel 4.00E+01dB, Size 1.29E-06m to 4.57E-06m
DOI:10.1016/j.optlastec.2022.107923
Funding details: Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2452020264,2452021016, Acronym: -, Sponsor: Chinese Universities Scientific Fund;
Funding text:The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Acknowledgements. This work was supported by the Chinese Universities Scientific Fund (2452021016, 2452020264), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB24030600).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 113>
Accession number:20222712324891
Title:Direct Writing of Channel Optical Waveguides in Er<sup>3+</sup>-Doped Aluminosilicate Glass by Low Repetition Rate Femtosecond Laser
Authors:Bai, Jing (1, 3); Long, Xue-Wen (2); Wang, Wei-Qiang (4); Xie, Peng (5); Zhao, Wei (4)
Author affiliation:(1) Department of Physics, Taiyuan Normal University, Jinzhong; 030619, China; (2) Institute of Medical Physics, Hunan University of Medicine, Hunan, Huaihua; 418000, China; (3) Institute of Computational and Applied Physics, Taiyuan Normal University, Jinzhong; 030619, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Department of Engineer Science, University of Oxford, Parks Road, Oxford; OX1 3PJ, United Kingdom
Corresponding authors:Bai, Jing(bai2000yw@163.com); Long, Xue-Wen(xwlong77@126.com)
Source title:ACS Applied Electronic Materials
Abbreviated source title:ACS Appl. Electron. Mater.
Volume:4
Issue:6
Issue date:June 28, 2022
Publication year:2022
Pages:3107-3114
Language:English
E-ISSN:26376113
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The symmetrical optical waveguide structures are fabricated in Er3+-doped aluminosilicate glass using 800 nm femtosecond laser writing in kHz repetition frequency regime. The impact of writing parameters on the waveguide preparation with a 10× microscope objective in the longitudinal writing scheme was studied in detail. The experimental results show that, under a fixed pulse energy value of 20 μJ, the waveguides can be realized with the scan speed from 20 to 160 μm/s, and with a fixed scan speed value of 160 μm/s, the waveguide can be prepared under an inscription energy range of 5-30 μJ, indicating that the waveguide can be realized in a wide range of writing parameters. The near-field mode intensity image shows that the waveguide region possesses excellent light guiding properties. Based on the refractive index profile reconstruction method, the maximum refractive index increase in the waveguide region is estimated to be about 5.5 × 10-4. The lowest propagation loss of the waveguide was measured to be about 1.51 dB/cm by the waveguide side scattering method. The microfluorescence spectra show that the gain characteristics of the waveguide region are well maintained after laser processing. This work shows that the fabrication of embedded optical waveguides using ultrashort pulse laser in Er3+-doped aluminosilicate glass has strong feasibility and great potential to create active gain devices in the field of integrated photonics and all-optical communication.<br/></div> © 2022 American Chemical Society.
Number of references:36
Main heading:Optical waveguides
Controlled terms:Aluminosilicates - Fabrication - Femtosecond lasers - Glass - Optical communication - Refractive index
Uncontrolled terms:Aluminosilicate glass - Direct-writing - Er3+-doped aluminosilicate glass - Femtosecond laser inscriptions - Integrated optic devices - Laser materials - Low repetition rate - Microstructure fabrication - Scan speed - Symmetrical optical waveguides
Classification code:714.3 Waveguides - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 812.3 Glass
Numerical data indexing:Decibel 1.51E+00dB, Energy 2.00E-05J, Energy 5.00E-06J to 3.00E-05J, Size 8.00E-07m, Velocity 1.60E-04m/s, Velocity 2.00E-05m/s to 1.60E-04m/s
DOI:10.1021/acsaelm.2c00520
Funding details: Number: 2020122002, Acronym: -, Sponsor: -;Number: 2021L421, Acronym: -, Sponsor: -;Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The work is supported by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2021L421), the National Natural Science Foundation of China (62075238), and the Doctoral Scientific Research Foundation of Hunan University of Medicine in China (No. 2020122002).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 114>
Accession number:20220005731
Title:Localized modes in nonlinear fractional systems with deep lattices
Authors:Liu, Xiuye (1, 2); Malomed, Boris A. (3, 4, 5); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'An; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering; (4) Center for Light-Matter Interaction, Tel Aviv University, Ramat Aviv, Tel Aviv; P.O.B. 39040, Israel; (5) Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica, Chile
Source title:arXiv
Abbreviated source title:arXiv
Issue date:January 4, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Solitons in the fractional space, supported by lattice potentials, have recently attracted much interest. We consider the limit of deep one-and two-dimensional (1D and 2D) lattices in this system, featuring finite bandgaps separated by nearly flat Bloch bands. Such spectra are also a subject of great interest in current studies. The existence, shapes, and stability of various localized modes, including fundamental gap and vortex solitons, are investigated by means of numerical methods; some results are also obtained with the help of analytical approximations. In particular, the 1D and 2D gap solitons, belonging to the first and second finite bandgaps, are tightly confined around a single cell of the deep lattice. Vortex gap solitons are constructed as four-peak "squares" and "rhombuses" with imprinted winding number S = 1. Stability of the solitons is explored by means of the linearization and verified by direct simulations.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:92
Main heading:Solitons
Controlled terms:Energy gap - Numerical methods - Vortex flow
Uncontrolled terms:1D lattices - 2D lattice - Bloch band - Fractional systems - Gap soliton - Lattice potentials - Localized modes - One-dimensional - Spectra's - Two-dimensional
Classification code:631.1 Fluid Flow, General - 921.6 Numerical Methods
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2201.01038v2
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 115>
Accession number:20220911734801
Title:Fastening torque simulation method of pressure-ring based on finite element simulation analysis and experimental verification
Authors:Zhao, Yue (1); Kang, Shifa (1); Fu, Xihong (1); Zhang, Gaopeng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences. xi'An, ShaanXi; 710119, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121661I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Aiming at the problem of abnormal sound of lens caused by incomplete tightening of pressure coil after optical lens installation, this paper presents a method for calculating and verifying the tightening moment of pressure coil. According to the mechanical dimension of the screw thread of the pressing ring, the mechanical properties of the pressing ring of the mirror tube and the optimal number of turning rings were calculated and analyzed. In order to meet the practical application requirements, the tightening moment of the pressure coil obtained by the solution was brought into the 3D model for simulation, and the finite element modeling analysis of the tightening moment of the pressure coil of the optical lens was completed, so as to further solve the displacement variation of the lens group. Finally, the above analysis results were quantified by torque wrenches, and random vibration was carried out at one third of the order of acceptance level vibration test conditions, so as to complete the bottom analysis and verify the tightening torque of the screw ring under different ratios of XM-31 adhesive and vulcanizing agent. The experimental results show that the characteristic sweep curve of the optical lens does not change before and after the vibration, the mode of the optical lens remains stable all the time, and the data modal analysis results are consistent with the actual situation.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Finite element method
Controlled terms:3D modeling - Vibration analysis - Adhesives - Modal analysis - Acceptance tests
Uncontrolled terms:Connections strength - Finite element analyse - Finite elements simulation - Optical adjustment - Optical lens - Pressing ring - Simulation analysis - Simulation-modelling - Tightening moment - Torque simulation
Classification code:723.2 Data Processing and Image Processing - 913 Production Planning and Control; Manufacturing - 921 Mathematics - 921.6 Numerical Methods
DOI:10.1117/12.2611752
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 116>
Accession number:20223612684671
Title:Sea-Urchin-MnO<inf>2</inf> for Broadband Optical Modulator
Authors:Han, Yueheng (1); Li, Xiaohui (1); Chen, Enci (2); An, Mingqi (1); Song, Zhuoying (3); Huang, Xiangzhen (1); Liu, Xinfeng (4); Wang, Yishan (5); Zhao, Wei (5)
Author affiliation:(1) School of Physics & Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (2) School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, No.1037 Luoyu Road, Wuhan; 430074, China; (3) Shaanxi University of Science & Technology, Department of Physics, Xi'an; 710021, China; (4) CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing; 100190, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Advanced Optical Materials
Abbreviated source title:Adv. Opt. Mater.
Volume:10
Issue:22
Issue date:November 18, 2022
Publication year:2022
Article number:2201034
Language:English
E-ISSN:21951071
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Manganese dioxide (MnO<inf>2</inf>) is considered to be one of the nanomaterials with enormous value in research and application because of its high theoretical specific capacitance, large specific surface area and porosity, excellent electron transfer ability, and excellent light absorption ability. However, exploring superior nonlinear absorption of MnO<inf>2</inf> in the broadband spectrum is still the key challenge to harvesting their greatest potential. In this paper, the optical modulator based on MnO<inf>2</inf> is fabricated, and its nonlinear optical performance is measured. The results indicate that the modulation depth is 4.4% and the saturable intensity is 32.8 MW cm<sup>−2</sup> at 1.5 µm region. What's more fascinating is that the modulator based on MnO<inf>2</inf> is integrated into Er-doped and Tm-doped fiber resonators to successfully demonstrate its broadband mode-locking operations. The coexistence of harmonic bound state pulse and conventional soliton pulse, as well as dual-wavelength solitons, have been obtained in a communication window and conventional soliton in a 2 µm-band can be also achieved. This demonstrates that MnO<inf>2</inf> serves as a broadband optical modulator, which makes MnO<inf>2</inf> more competitive in the future ultrafast photonics and helps to expand the frontier of photonic technology.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:55
Main heading:Saturable absorbers
Controlled terms:Absorption spectroscopy - Light absorption - Light modulation - Light modulators - Mammals - Manganese oxide - Nonlinear optics - Optical signal processing - Solitons
Uncontrolled terms:Broadband saturable absorber - Electron transfer - Large specific surface areas - Mid-infrared regime - Midinfrared - Nonlinear absorptions - Research and application - Sea-urchin - Specific capacitance - Specific surface area and porosities
Classification code:741.1 Light/Optics - 741.1.1 Nonlinear Optics - 744.1 Lasers, General - 804 Chemical Products Generally
Numerical data indexing:Percentage 4.40E+00%, Power 3.28E+07W, Size 5.08E-02m
DOI:10.1002/adom.202201034
Funding details: Number: 2020KW‐005, Acronym: -, Sponsor: -;Number: 1110010717,1112010209,18QNGG006, Acronym: -, Sponsor: Shaanxi Normal University;Number: 2020CSLY005,GK201802006, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Y.H. and X.L. contributed equally to this work. This research was supported by the International Science &Technology Cooperation and Exchanges Project of Shaanxi (No.2020KW‐005); projects for the Academic Leader and Academic Backbones, Shaanxi Normal University (No. 18QNGG006); Starting Grants of Shaanxi Normal University (Grant Nos. 1112010209 and 1110010717); Fundamental Research Funds for the Central Universities (No. GK201802006, 2020CSLY005).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 117>
Accession number:20220911734999
Title:Research on the properties of Ta<inf>2</inf>O<inf>5</inf>optical films prepared with APS plasma assisted deposition
Authors:Pan, Yong-Gang (1); Liu, Zheng (1); Liu, Wen-Cheng (1); Li, Mian (1); Zhang, Si-Bao (1); Luo, Chang-Xin (1); Zhang, Chun-Juan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China
Corresponding author:Pan, Yong-Gang(pyg_optics@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:1216602
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Ta2O5 thin films are widely used in optical and microelectronic industry because of its superior optical and mechanical properties. In this paper, single-layer Ta2O5 thin films were prepared by APS plasma assisted electron beam evaporation deposition. Based on the theory of ion energy transfer, the selection criteria of APS process parameters were established. By optimizing APS source parameters, Ta2O5 thin films with different characteristics were prepared. The spectral and refractive index dispersion of Ta2O5 thin films were analyzed by Cary7000 spectrophotometer. The stress and surface roughness of Ta2O5 films were analyzed by Zygo interferometer. Experiment and analysis results showed that the characteristics of Ta2O5 thin films are closely related to APS plasma assisted processing parameters. The discharge current and bias voltage of APS source have great influence on the stress and surface roughness of Ta2O5 thin films, but have little influence on the spectral characteristics and refractive index dispersion. The influences of preparation parameters on the properties of Ta2O5 thin films were analyzed and optimization fabrication parameters were obtained.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:15
Main heading:Refractive index
Controlled terms:Dielectric materials - Surface roughness - Deposition - Thin films - Dispersion (waves) - Tantalum oxides - Microelectronics - Energy transfer - Electric discharges - Film preparation
Uncontrolled terms:APS plasma assisted deposition - Microelectronic industry - Optical and mechanical properties - Optical industries - Plasma assisted deposition - Property - Refractive index dispersion - Single layer - Ta2O5 thin films - Thin-films
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 741.1 Light/Optics - 802.3 Chemical Operations - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2604831
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 118>
Accession number:20220511546844
Title:Localized Modes in Nonlinear Fractional Systems with Deep Lattices (Open Access)
Authors:Liu, Xiuye (1, 2); Malomed, Boris A. (3, 4); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, and the Center for Light-Matter Interaction, Tel Aviv University, P.O.B. 39040, Ramat Aviv, Tel Aviv, Israel; (4) Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica, Chile
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Advanced Theory and Simulations
Abbreviated source title:Adv. Theory Simul.
Volume:5
Issue:4
Issue date:April 2022
Publication year:2022
Article number:2100482
Language:English
E-ISSN:25130390
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Solitons in the fractional space, supported by lattice potentials, have recently attracted much interest. The limit of deep 1D and 2D lattices in this system is considered, featuring finite bandgaps separated by nearly flat Bloch bands. Such spectra are also a subject of great interest in current studies. The existence, shapes, and stability of various localized modes, including fundamental gap and vortex solitons, are investigated by means of numerical methods; some results are also obtained with the help of analytical approximations. In particular, the 1D and 2D gap solitons, belonging to the first and second finite bandgaps, are tightly confined around a single cell of the deep lattice. Vortex gap solitons are constructed as four-peak "squares" and "rhombuses" with imprinted winding number (Formula presented.). Stability of the solitons is explored by means of the linearization and verified by direct simulations.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:99
Main heading:Solitons
Controlled terms:Numerical methods - Energy gap - Vortex flow
Uncontrolled terms:'current - 1D lattices - 2D lattice - Bloch band - Fractional systems - Fundamental gaps - Gap soliton - Lattice potentials - Localized modes - Spectra's
Classification code:631.1 Fluid Flow, General - 921.6 Numerical Methods
DOI:10.1002/adts.202100482
Funding details: Number: 12074423,61690222,61690224, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 1286/17, Acronym: ISF, Sponsor: Israel Science Foundation;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 61690224, 61690222, and 12074423); Israel Science Foundation (Grant No. 1286/17).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 119>
Accession number:20230713575048
Title:Analysis and Design of Fault Prediction and Health Assessment System for the optoelectronic Equipment
Authors:Zhang, Chuming (1); Wei, Guojun (1); Wang, Xuan (2); Cao, Yu (2); Xie, Meilin (2)
Author affiliation:(1) Space Engineering University, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Source title:IMCEC 2022 - IEEE 5th Advanced Information Management, Communicates, Electronic and Automation Control Conference
Abbreviated source title:IMCEC - IEEE Adv. Inf. Manag., Commun., Electron. Autom. Control Conf.
Part number:1 of 1
Issue title:IMCEC 2022 - IEEE 5th Advanced Information Management, Communicates, Electronic and Automation Control Conference
Issue date:2022
Publication year:2022
Pages:891-895
Language:English
ISBN-13:9781665479677
Document type:Conference article (CA)
Conference name:5th IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2022
Conference date:December 16, 2022 - December 18, 2022
Conference location:Chongqing, China
Conference code:186387
Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Global Union Academy of Science and Technology; Chongqing University of Technology; et al.; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, due to the rise of emerging technologies such as integrated circuits, artificial intelligence and big data, Optical measurement equipment performance is also constantly improving, more and more new technology, new processes, new materials continue to appear. Therefore, the maintenance of the optoelectronic equipment is also much more difficult. Based on these problems, this paper investigates the application of fault prediction and health management in optoelectronic devices. The main analysis and design of the system failure prediction and health assessment, and in response to the needs of optoelectronic devices for the life analysis, health status determination, fault prediction alarms, etc, designed a failure prediction and health assessment system for optoelectronic devices.<br/></div> © 2022 IEEE.
Number of references:12
Main heading:Optoelectronic devices
Controlled terms:Forecasting - Optical data processing
Uncontrolled terms:Assessment system - Emerging technologies - Equipment performance - Failures prediction - Fault prediction - Health assessments - Measurement equipment - Optical measurement - Optoelectronic equipment - Optoelectronics devices
Classification code:723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems
DOI:10.1109/IMCEC55388.2022.10019826
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 120>
Accession number:20220361975
Title:Structured transverse orbital angular momentum probed by a levitated optomechanical sensor
Authors:Hu, Yanhui (1, 2); Kingsley-Smith, Jack J. (1, 2); Nikkhou, Maryam (1, 2); Sabin, James A. (1, 2); Rodríguez-Fortuño, Francisco J. (1, 2); Xu, Xiaohao (3); Millen, James (1, 2)
Author affiliation:(1) Department of Physics, King's College London, Strand, London; WC2R 2LS, United Kingdom; (2) London Centre for Nanotechnology, Department of Physics, King's College London, Strand, London; WC2R 2LS, United Kingdom; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Xu, Xiaohao(xuxhao_dakuren@163.com); Millen, James(james.millen@kcl.ac.uk)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:September 20, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">The momentum carried by structured light fields exhibits a rich array of surprising features. In this work, we generate transverse orbital angular momentum (TOAM) in the interference field of two parallel and counter-propagating linearly-polarised focused beams, synthesising an array of identical handedness vortices carrying intrinsic TOAM. We explore this structured light field using an optomechanical sensor, consisting of an optically levitated silicon nanorod, whose rotation is a probe of the optical angular momentum, which generates an exceptionally large torque. This simple creation and direct observation of TOAM will have applications in studies of fundamental physics, the optical manipulation of matter and quantum optomechanics.<br/></div> © 2022, CC BY-NC-ND.
Number of references:54
Main heading:Nanorods
Controlled terms:Angular momentum - Optomechanics
Uncontrolled terms:Counterpropagating - Focused beams - Interference field - Large torque - Light fields - Linearly polarized - Optical angular momentum - Opto-mechanical sensors - Orbital angular momentum - Structured Light
Classification code:761 Nanotechnology - 933 Solid State Physics - 961 Systems Science
DOI:10.48550/arXiv.2209.09759
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2209.09759v2
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 121>
Accession number:20223412593662
Title:The Collection Efficiency of a Large Area PMT Based on the Coated MCPs (Open Access)
Authors:Wang, Xingchao (1, 3); Chen, Lin (2); Wang, Qilong (1); He, Jianli (5); Tian, Li Liping (2); Tian, Jinshou (4); Shen, Lingbin (2); Wang, Yunji (2)
Author affiliation:(1) School of Electronic Science and Engineering, Southeast University, Nanjing; 210096, China; (2) School of Network and Communication Engineering, Jinling Institute of Technology, Nanjing; 211169, China; (3) North Night Vision Technology (NNVT) CO., Ltd, Nanjing; 210110, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (5) Inner Mongolia University of Science and Technology, Baotou; 014010, China
Source title:Measurement Science Review
Abbreviated source title:Meas. Sci. Rev.
Volume:22
Issue:5
Issue date:October 1, 2022
Publication year:2022
Pages:241-245
Language:English
E-ISSN:13358871
Document type:Journal article (JA)
Publisher:Sciendo
Abstract:<div data-language="eng" data-ev-field="abstract">The electron collection efficiency (CE) of the photomultiplier tube based on microchannel plates (MCP-PMT) is limited by the MCP open area fraction. Coating MCP with a high secondary yield material is supposed to be an effective approach to improve CE. Both typical and coated MCP-PMTs are developed. A relative measurement method is proposed to characterize the collection efficiency performance. Results show that the PMT based on the coated MCPs has a significant improvement on CE, a good gain uniformity and a high precise energy resolution.<br/></div> © 2022 Xingchao Wang et al., published by Sciendo.
Number of references:18
Main heading:Photomultipliers
Controlled terms:Image storage tubes - Microchannels
Uncontrolled terms:Area fraction - Collection efficiency - Effective approaches - Electron collections - MCP-PMT - Measurement methods - Micro channel plate - Performance - Photomultiplier tube - Relative measurement
Classification code:714.1 Electron Tubes
DOI:10.2478/msr-2022-0030
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 122>
Accession number:20222112148900
Title:Low Temperature 808 nm High Efficiency Semiconductor Laser
Title of translation:低温808 nm高效率半导体激光器
Authors:Wu, Shun-Hua (1, 2); Liu, Guo-Jun (2, 3); Wang, Zhen-Fu (4); Li, Te (4)
Author affiliation:(1) School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun; 130022, China; (2) State Key Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun; 130022, China; (3) College of Physics and Electronic Engineering, Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Hainan Normal University, Haikou; 571158, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding authors:Liu, Guo-Jun(gjliu626@126.com); Liu, Guo-Jun(gjliu626@126.com); Li, Te(Lite@opt.ac.cn)
Source title:Faguang Xuebao/Chinese Journal of Luminescence
Abbreviated source title:Faguang Xuebao
Volume:43
Issue:5
Issue date:May 2022
Publication year:2022
Pages:786-795
Language:Chinese
ISSN:10007032
CODEN:FAXUEW
Document type:Journal article (JA)
Publisher:Editorial Office of Chinese Optics
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the performance of 808 nm semiconductor laser operating at low temperature, the temperature dependence of electro-optical conversion efficiency was studied. Combining the suppression of carrier leakage and the optimization of the series resistance, the carrier confinement phenomenon in the quantum well was analyzed theoretically. Moreover, the potential barrier height and the corresponding quantum well structure for low temperature operating were proposed, including the optimization of important parameters such as the material composition and thickness of the barrier layer, which showed significant benefit for operation under low temperature. Basing on the optimized epitaxial structure, semiconductor laser bars with a cavity length of 2 mm were fabricated. Under the temperature of -50 ℃, an electro-optical conversion efficiency of 71% was demonstrated with a slope efficiency of 1.34 W/A and an injection current of 600 A. Record high electro-optical conversion efficiency of 73.5% was reached with the injection current of 400 A, while the carrier confinement efficiency was as high as 99%, and the series resistance was as low as 0.43 mΩ. In the temperature range of -60-60 ℃, the shift coefficient of the center wavelength with temperature was about 0.248 nm/℃.<br/></div> © 2022, Science Press. All right reserved.
Number of references:25
Main heading:Semiconductor quantum wells
Controlled terms:Temperature distribution - Conversion efficiency - Electric resistance - Quantum well lasers
Uncontrolled terms:Carrier confinements - Carrier leakage - Electro-optical - Higher efficiency - Injection currents - Lows-temperatures - Optical conversion efficiency - Optimisations - Performance - Series resistances
Classification code:525.5 Energy Conversion Issues - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 744.1 Lasers, General
Numerical data indexing:Electric current 4.00E+02A, Electric current 6.00E+02A, Electrical resistance 4.30E-04Ohm, Percentage 7.10E+01%, Percentage 7.35E+01%, Percentage 9.90E+01%, Power 1.34E+00W, Size 2.00E-03m, Size 2.48E-10m, Size 8.08E-07m
DOI:10.37188/CJL.20220025
Funding details: Number: 2017KJXX-72, Acronym: -, Sponsor: -;Number: 61504167, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019ZY-CXPT-03-05,2019ZY-CXPT-03-05,2018JM6010,2015JQ6263, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: JM6010,JQ6263, Acronym: -, Sponsor: -;
Funding text:收稿日期: 2022-01-19; 修订日期: 2022-02-11 基金项目: 国家自然科学基金(61504167); 陕西省自然科学基金(2019ZY-CXPT-03-05,2018JM6010,2015JQ6263); 陕西省科技厅 人才项目(2017KJXX-72); 长春理工大学高功率半导体激光国家重点实验室基金资助项目 Supported by National Natural Science Foundation of China(61504167); Natural Science Foundation of Shaanxi Province (2019ZY-CXPT-03-05,2018JM6010,2015JQ6263); Talent Project of Science and Technology Department of Shaanxi Province (2017KJXX-72); Foundation of State Key Laboratory of High Power Semiconductor Laser of Changchun University of Science and Technology
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 123>
Accession number:20221411884170
Title:Ultrafast Tm:CaYAlO<inf>4</inf> laser with pulse regulation and saturation parameters evolution in the 2 μm water absorption band
Authors:Cao, Xue (1); Zhu, Qiang (1); Xian, Anhua (1); Liu, Yangyu (1); Liu, Guangmiao (1); Li, Luyao (1); Li, Xianni (1); Xu, Xiaodong (1); Zhou, Wei (1); Wang, Haotian (1); Huang, Haitao (1); Jia, Baohua (2); Wang, Yishan (3); Wang, Jingru (4); Tang, Dingyuan (1); Shen, Deyuan (1)
Author affiliation:(1) Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou; 221116, China; (2) Centre for Translational Atomaterials, School of Science, Computing & Engineering Technologies, Swinburne University of Technology, POB 218, Hawthorn; VIC; 3122, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) SIAS University, 168 People's Road, Henan Province, Zhengzhou Xinzheng City; 451100, China
Corresponding author:Zhou, Wei(zhwwcumt@163.com)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:152
Issue date:August 2022
Publication year:2022
Article number:108096
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Ultrafast solid-state laser sources operating in the mid-infrared (mid-IR) region are of significant importance in a variety of applications. However, the realization of ultrafast lasers with narrow pulse width at wavelengths between 1.8 and 2 µm has remained a big challenge due to the strong water molecule absorption. Here, we report a stable mode-locking (ML) pulsed lasing at 1967 nm and narrow pulse duration of 1.97 ps in a diode-pumped Tm:CaYAlO<inf>4</inf> (Tm:CYA) crystal laser oscillator. By employing the SESAMs with different modulation depths as mode-lockers, we show that under the increasing saturation parameters, output pulses could be narrowed in the steady state cavity. Furtherly, the generalized Ginzburg-Landau equation is used for the mode-locked pulse dynamic evolutions. It shows that the pulse- regulation mechanism in solid-state cavity at water absorption band is governed by the balance of the laser gain, the modulation depth, and the saturation parameter. To our knowledge, this is the first demonstration of pulse regulation mechanism in the 2 μm water absorption band by a commercial laser diode in a Tm:CYA laser. Our results provide an effective method for pulse regulation of ultra-short mid-IR pulses and even few-cycle pulses with controllable optical spectra in the water absorption band.<br/></div> © 2022
Number of references:43
Main heading:Water absorption
Controlled terms:Infrared lasers - Locks (fasteners) - Solid state lasers - Infrared devices - Modulation - Pulsed lasers - Molecules - Optical pumping - Ultrafast lasers
Uncontrolled terms:Infrared-laser - Mid-infrared laser - Midinfrared - Modelocked lasers - Pulse regulation - Saturation parameters - Solid-state - Spectra's - Spectrum broadened - Ultra-fast
Classification code:744.1 Lasers, General - 744.4 Solid State Lasers - 802.3 Chemical Operations - 931.3 Atomic and Molecular Physics
Numerical data indexing:Size 1.967E-06m, Size 2.00E-06m, Time 1.97E-12s
DOI:10.1016/j.optlastec.2022.108096
Funding details: Number: 2020XKT785,2020XKT797,2021XKT1246, Acronym: -, Sponsor: -;Number: 202010320129Y, Acronym: -, Sponsor: -;Number: 61805111,61805112, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201707, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: KYCX20_2343, Acronym: -, Sponsor: Graduate Research and Innovation Projects of Jiangsu Province;Number: -, Acronym: PAPD, Sponsor: Priority Academic Program Development of Jiangsu Higher Education Institutions;Number: KC21043, Acronym: -, Sponsor: Xuzhou Science and Technology Program;
Funding text:This work is supported by National Natural Science Foundation of China ( 61805111, 61805112 ); Graduate Research and Innovation Projects of Jiangsu Normal University in 2020 ( 2020XKT785, 2020XKT797, 2021XKT1246 ); Xuzhou Science and Technology Program ( KC21043 ); Graduate Research and Innovation Projects of Jiangsu Province ( KYCX20_2343 ); State Key Laboratory of Transient Optics and Photonics ( SKLST201707 ); Priority Academic Program Development of Jiangsu Higher Education Institutions. Innovation and Entrepreneurship Training program for College students in Jiangsu Province ( 202010320129Y ).This work is supported by National Natural Science Foundation of China (61805111, 61805112); Graduate Research and Innovation Projects of Jiangsu Normal University in 2020 (2020XKT785, 2020XKT797, 2021XKT1246); Xuzhou Science and Technology Program (KC21043); Graduate Research and Innovation Projects of Jiangsu Province (KYCX20_2343); State Key Laboratory of Transient Optics and Photonics (SKLST201707); Priority Academic Program Development of Jiangsu Higher Education Institutions. Innovation and Entrepreneurship Training program for College students in Jiangsu Province (202010320129Y).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 124>
Accession number:20221611967796
Title:Quantitative simulating experiment of atmospheric turbulence scintillation for light field imaging
Authors:Cheng, Zhiyuan (1, 2); Ma, Qing (3); Li, Zhiguo (1, 2); Xia, Aili (1); Ji, Zhou (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechnics, Chinese Acdemy of Science, 710119, China; (2) CAS Key Laboratory of Space Precision Measurement Technolozy, Xi'an; 710119, China; (3) Xi'an University of Architecture and Technology, Xi'an; 710055, China; (4) Unversity of Chinese Acdemy of Sciences, Beijing; 100049, China
Corresponding author:Cheng, Zhiyuan
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:12169A6
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The laser coherent field imaging system emits multiple beams of laser from earth to space, and the laser scans remote space target by passing through turbulent atmosphere. Turbulent atmosphere is a key factor affecting imaging quality of the coherent field imaging system. Aiming at quantitative simulating of degradation imaging effect caused by atmospheric scintillation, the quantificational simulating experiment platform of atmosphere scintillation is established. Based on the simulating platform, the effect of different intensity turbulence on imaging quality is quantificationally researched. The research draws the conclusion that the greater fluctuation of atmosphere turbulence is, the more serious the degradation of imaging quality is. Thus, in order to improve the imaging quality, the turbulent atmosphere scintillation need to be restrained by signal processing method in the following research. The study provides a achievable quantitative simulating method of turbulent air scintillation for analyzing degradation imaging quality caused by the turbulent atmosphere scintillation.<br/></div> © 2022 SPIE
Number of references:9
Main heading:Scintillation
Controlled terms:Atmospheric turbulence - Imaging systems - Atmospheric thermodynamics - Air
Uncontrolled terms:Atmosphere scintillation - Coherent fields - Field imaging - Imaging quality - Light field imaging - Light fields - Multiple beam - Quantitative scintillation simulating experiment - Simulating experiments - Turbulent atmosphere
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 741.1 Light/Optics - 746 Imaging Techniques - 804 Chemical Products Generally
DOI:10.1117/12.2625847
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China (Grant No 61875257) and the Natural Science Foundation of Shaanxi Province China (Grant No 2017JM6035). The research was also supported by the Open Resaech Fund of CAS Key Laboratory of Space Precision Measurement Technology(Grant No CXJJ-21S042).The author would like to thank Zhang Yu for technical support.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 125>
Accession number:20221611967902
Title:Realization of multi-point laser target detection algorithm based on DM6437
Authors:Bu, Fan (1); Yao, Dalei (1); Wang, Li (1)
Author affiliation:(1) The Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, CAS, Shaanxi, Xi'an; 710119, China
Corresponding author:Bu, Fan
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:1216917
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In view of the background interference of the current multi-point laser target source positioning detection system, positioning accuracy and real-time performance need to be improved. Based on the DM6437 hardware platform, an embedded multi-point laser target positioning system is designed. The collection of image information is completed by CMOS camera and TVP5158 chip. The DM6437 chip realizes tasks such as algorithm processing and data transmission. Experimental results show that the target location algorithm based on threshold and shape effectively removes the interfering light source in the image background. Therefore, the accuracy of laser target location is greatly improved. The positioning system based on the DSP hardware platform is small in size, stable in operation, and has high application promotion value.<br/></div> © 2022 SPIE
Number of references:13
Main heading:Light sources
Controlled terms:Signal detection - Data handling - Digital signal processing - Optical instruments
Uncontrolled terms:Binarizations - Dm6437 - DSP - Hardware platform - Laser targets - Multi-point laser target - Multi-points - Positioning system - Target location - Threshold
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 941.3 Optical Instruments
DOI:10.1117/12.2622178
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 126>
Accession number:20220911734996
Title:A new off-axis Gregorian mechanical structure and its alignment method
Authors:Fu, Xing (1); Lei, Yu (1); Cao, Mingqiang (1); Yin, Yamei (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, CAS, NO.17 Xinxi Road, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:1216676
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As for the conventional off-axis telescope system structure, the primary and secondary mirror are mostly fixed. The alignment process lacks adjustment mechanism. In addition, the off-axis system has no rotational symmetry which increases the difficulty of alignment and makes the cycle longer. In order to solve the above problems, an off-axis telephoto system structure is designed. The primary mirror has a four degree-of-freedom adjustment mechanism can be fine-tuned manually. The secondary mirror is driven by 6-aixs motion hexapod electrically. At the same time, perturbation analysis is carried out for this optical system. The sensitivity matrix between misalignments of second mirror and aberration coefficients is obtained. Based on the matrix, adjustment strategy is proposed [1-9]. Finally, the effectiveness of the designed structure and adjustment strategy is verified by experiments.The detailed process is described below.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Alignment
Controlled terms:Mirrors - Optical systems - Degrees of freedom (mechanics)
Uncontrolled terms:Adjustment mechanisms - Gregorian - Mechanical structures - Off-axis - Off-axis optical system - Primary mirrors - Secondary mirror - Sensitivity matrix - Systems Structure - Zernike coefficient
Classification code:601.1 Mechanical Devices - 741.3 Optical Devices and Systems - 931.1 Mechanics
DOI:10.1117/12.2617928
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 127>
Accession number:20220611611933
Title:Stable continuous-wave mode-locked laser from a 1645 nm Er:YAG ceramic oscillator
Authors:Liu, Yangyu (1); Cao, Xue (1); Xian, Anhua (1); Liu, Guangmiao (1); Zhou, Wei (1); Wang, Haotian (1); Wang, Yishan (2); Jia, Baohua (3); Tang, Dingyuan (1); Shen, Deyuan (1, 4)
Author affiliation:(1) Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou; 221116, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, POB 218, Hawthorn; VIC; 3122, Australia; (4) Institute of Mid-infrared Laser Technology (Jiangsu) Company Ltd, Xuzhou; 221000, China
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:15
Issue:2
Issue date:February 2022
Publication year:2022
Article number:022003
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:IOP Publishing Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate stable continuous-wave mode-locking (CWML) pulses around 1645 nm by employing a homemade Er:YAG ceramic. By using a fiber laser and semiconductor saturable absorber mirror (SESAM) with a modulation depth of 1.2%, we get ML pulses with an output average power up to 815 mW, a pulse width shortened as ∼4 ps, and a peak power of ∼1.8 kW. With the SESAM of the modulation depth of 2.4%, second-order harmonic ML pulses were also obtained. As far as we know, this is the first report of CWML from Er3+-doped ceramics and also the shortest pulse duration in Er3+-doped solid-state oscillators.<br/></div> © 2022 The Japan Society of Applied Physics.
Number of references:25
Main heading:Semiconductor saturable absorber mirrors
Controlled terms:Fiber lasers - Laser mirrors - Semiconductor lasers - Modulation - Mode-locked fiber lasers - Yttrium aluminum garnet
Uncontrolled terms:A.Fibres - Average power - Ceramic oscillators - Continuous wave modes - Continuous-wave mode locking - Er: YAG - Modelocked lasers - Modulation depth - Pulsewidths - Pulswidths
Classification code:741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.4 Solid State Lasers - 744.4.1 Semiconductor Lasers - 744.7 Laser Components - 804.2 Inorganic Compounds
Numerical data indexing:Percentage 1.20E+00%, Percentage 2.40E+00%, Power 1.80E+03W, Power 8.15E-01W, Size 1.645E-06m, Time 4.00E-12s
DOI:10.35848/1882-0786/ac481c
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 128>
Accession number:20224012830211
Title:Effect of adding CsI on properties of Ge<inf>20</inf>Sb<inf>10</inf>Se<inf>65</inf>Te<inf>5</inf> glass
Authors:Xu, Junfeng (1); Zhang, Baodong (1); Cao, Jitao (1); Fan, Wenwen (1); Yao, Zhirui (1); Li, Xuyang (2)
Author affiliation:(1) School of Materials and Chemical Engineering, Xi'an Technological University, 710021, China; (2) Xi'an Institute of Optics and Precision Machanicas, CAS Shaanxi, Xi'an; 710119, China
Corresponding author:Xu, Junfeng(xujunfeng@mail.nwpu.edu.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:126
Issue date:November 2022
Publication year:2022
Article number:104370
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">The mechanical and thermal properties of (100-x)Ge<inf>20</inf>Sb<inf>10</inf>Se<inf>65</inf>Te<inf>5</inf>-xCsI(x = 0, 1, 2, 3, 4) glass was studied. It is found that with increase of CsI, the short-wave cut-off wavelength of infrared transmittance moves from 1000 nm to 900 nm, and the long-wave cut-off wavelength reaches 20 μm. The glass transition temperature decreases from 531 K to 521 K. The crystallization peak temperature T<inf>p</inf> decreases from 709 K to 670 K. The Vicker′s hardness decreases from 142H<inf>V</inf> to 134H<inf>V</inf>. The fracture toughness increases from o.48 to 0.57. The specific heat capacities were measured by the isothermal step method and it shows that the specific heat for the sample with CsI is larger than that without CsI. For 96Ge<inf>20</inf>Sb<inf>10</inf>Se<inf>65</inf>Te<inf>5</inf>-4CsI glass, the transmittance changes from 70 % to 53 % if the treatment temperature is between 280 °C and 310 °C. When it is kept at 310 °C for 40 h, the Vicker′s hardness and fracture toughness of the glass can reach 160.56 kgf⋅mm<sup>−2</sup> and 0.82 kgf⋅mm<sup>−1/2</sup>, respectively.<br/></div> © 2022 Elsevier B.V.
Number of references:31
Main heading:Hardness
Controlled terms:5G mobile communication systems - Antimony compounds - Cesium iodide - Fracture toughness - Germanium compounds - Glass - Glass transition - Selenium compounds - Silicon compounds - Specific heat - Tellurium compounds
Uncontrolled terms:Chalcogenide - Cutoff wavelengths - Glass transition temperature Tg - Infrared transmittance - Long waves - Mechanical and thermal properties - Property - Short waves - Temperature decrease - Vickers
Classification code:641.1 Thermodynamics - 716.3 Radio Systems and Equipment - 802.3 Chemical Operations - 804 Chemical Products Generally - 812.3 Glass - 951 Materials Science
Numerical data indexing:Force 1.575094E+03N, Force 1.962E+01N, Force 8.0442E+00N, Inductance 1.34E+02H, Inductance 1.42E+02H, Percentage 7.00E+01% to 5.30E+01%, Size 1.00E-06m to 9.00E-07m, Size 2.00E-05m, Temperature 5.31E+02K to 5.21E+02K, Temperature 5.53E+02K to 5.83E+02K, Temperature 5.83E+02K, Temperature 7.09E+02K to 6.70E+02K, Time 1.44E+05s
DOI:10.1016/j.infrared.2022.104370
Funding details: Number: 2016KJXX-87, Acronym: -, Sponsor: Key Science and Technology Program of Shaanxi Province;
Funding text:This work was financially supported by the Science and Technology Program of Shaanxi Province (no. 2016KJXX-87). JF Xu thanks Tao Zhang, Chengcheng Guo and Xiaolong Xu for their help in this work.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 129>
Accession number:20215111368310
Title:High-Q Toroidal Dipole Metasurfaces Driven By Bound States in the Continuum for Ultrasensitive Terahertz Sensing
Authors:Chen, Xu (1); Fan, Wenhui (1); Jiang, Xiaoqiang (1); Yan, Hui (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Fan, Wenhui(fanwh@opt.cn)
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:40
Issue:7
Issue date:April 1, 2022
Publication year:2022
Pages:2181-2190
Language:English
ISSN:07338724
E-ISSN:15582213
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A novel metallic toroidal dipole (TD) metasurface driven by Friedrich-Wintgen bound states in the continuum (FW-BIC) is theoretically proposed for terahertz (THz) sensing. By tuning the middle gap distance without breaking the symmetry of unit cell, the FW-BIC and quasi-BIC mode can be excited via resonance coupling between dipole modes. Based on the cyclic distribution of anti-aligned magnetic dipoles and the calculated scattering powers, TD resonance is demonstrated qualitatively and quantitatively; also FW-BIC is verified by far-field transmission spectrum and near-field enhancement spectrum. More importantly, it is the first time to exploit this quasi-BIC TD resonance for THz sensing to the best of our knowledge. For micron film sensing with frequency shift (FS) method, numerical results show the sensitivity, the Q-factor and the corresponding figure of merit (FoM) can simultaneously reach 775.7 GHz/RIU, 1016, and 284, respectively. Moreover, for nano film sensing where FS method is inapplicable, the amplitude difference method is utilized and the simulated results show it has superior sensing capability. Our proposed structure opens up an avenue to develop multifunctional and ultrasensitive THz sensors.<br/></div> © 2022 IEEE.
Number of references:56
Main heading:Magnetic resonance
Controlled terms:Q factor measurement - Numerical methods - Magnetism
Uncontrolled terms:Bound state in the continuum - Bound-states - Local field enhancement - Metasurface - Q-factors - Sensitivity - Terahertz sensing - Toroidal dipole - Toroidal magnetic fields
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 921.6 Numerical Methods - 942.2 Electric Variables Measurements
Numerical data indexing:Frequency 7.757E+11Hz
DOI:10.1109/JLT.2021.3132727
Funding details: Number: LSIT201913N, Acronym: -, Sponsor: -;Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018M643763,GrantsBX20180353, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2020JQ-437, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grants 61905276 and 61675230, in part by the Natural Science Foundation of Shaanxi Province under Grant 2020JQ-437, in part by the China Postdoctoral Science Foundation under GrantsBX20180353 and 2018M643763, and in part by the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences under Grant LSIT201913N.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 130>
Accession number:20223612691739
Title:Position-sensitive Micro-channel-plate Having Cross-delay-line Detector Based Photon-counting Three-dimensional Super-resolution Laser Imaging（Invited)
Title of translation:基 于 交 叉 延 迟 线 位 敏 阳 极 微 通 道 板 探 测 器 的光 子 计 数 激 光 三 维 超 分 辨 成 像（特 邀）
Authors:Zhao, Hui (1); Yin, Haomeng (1, 2); Liu, Yongan (1); Shen, Lizhi (1); Yang, Xianghui (1); Zou, Gangyi (1); Xia, Siyu (1); Yang, Mingyang (1, 2); Fan, Xuewu (1)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics of CAS, Xi′an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751407
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Laser-based active detection and imaging is where the space situational awareness heading in the future. The photon-sensitive detector is the core of the photon-counting-based three-dimensional laser imaging system whose working range is much longer and which is capable of realizing both high-precision distance measurement and three-dimensional surface reconstruction at the same time. Therefore，the photon-counting-based three-dimensional laser imaging is especially suitable for realizing ranging and three-dimensional imaging of distant space targets in a deep space background. In this manuscript，the position-sensitive Micro-channel-plate with Cross-delay-line （MCP/CDL） detector-based photon-counting three-dimensional imaging technique is proposed. First of all，the research background of this manuscript is systematically introduced and the contribution of the work reported to the field of photon-counting-based three-dimensional laser imaging is summarized. After that，starting from the characteristics of the MCP/CDL detector itself，the photon-counting three-dimensional laser imaging system by using the position-sensitive MCP/CDL detector is designed and the corresponding operating mode is discussed simply，which gives a reference for real application in future. After that，the principle of the proposed position-sensitive MCP/CDL detector-based photon-counting three-dimensional laser imaging technique is introduced from two aspects. In the one hand，how to use MCP/CDL detector to realize the synchronous timing and positioning of arriving photon is qualitatively explained. On the other hand，with the help of the classical LIDAR equation，the echo power model and the echo photon model generated from the echo power model are given respectively. Based on the two basic models，three important models including the signal to noise ratio model，detection probability model，and ranging accuracy model are derived one by one， based on which the performance of the proposed technique is investigated numerically. After establishing the all-chain imaging model，the potentials of this technique in space-borne space targets monitoring are investigated through end-to-end simulated imaging and performance analysis. By using the Monte Carlo simulation method，the simulated photon-counting three-dimensional laser imaging is carried out with different conditions and in this way，the potential performance of this system in space situational awareness is demonstrated vividly. However，nowadays，most photon-counting detectors including the MCP/CDL detector have a low spatial resolution. In this case，the ranging imaging has a strong mosaic effect which is hard to resolve finer details. Besides that，the ranging accuracy is mainly determined by timing electronics. Considering these two situations，how to improve the spatial and temporal resolution is also discussed. Taking the finer details provided by the higher resolution intensity image as reference，the spatial resolution of ranging images could be improved prominently. At the mean time，a controllable time delay is introduced to realize super-sample in ranging direction and the higher ranging accuracy could be obtained by fusing multiple range images. According to numerical simulations，the potential of this system in realizing super-resolution both in the spatial domain and in the temporal domain is demonstrated. Finally，the prototype camera using MCP/CDL detector is designed，tested and fabricated. By using the prototype camera，two groups of three-dimensional laser imaging experiments are carried out. The results demonstrate that this technique has the capability in resolving small distance variation of being less than 5 mm when the imaging distance is about 6.8 m. Therefore，the position-sensitive micro-channel-plate having cross-delay-line based photon-counting three-dimensional laser imaging is proven to be effective.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:48
Main heading:Photons
Controlled terms:Image resolution - Image storage tubes - Imaging systems - Intelligent systems - Monte Carlo methods - Signal to noise ratio
Uncontrolled terms:Active detection - Laser imaging - Micro channel plate - Photon counting - Photon counting detectors - Position sensitive - Ranging accuracy - Space situational awareness - Super-resolution reconstruction - Three-dimensional laser imaging
Classification code:714.1 Electron Tubes - 716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 746 Imaging Techniques - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics
Numerical data indexing:Size 5.00E-03m, Size 6.80E+00m
DOI:10.3788/gzxb20225107.0751407
Funding details: Number: -, Acronym: GF, Sponsor: Gannett Foundation;
Funding text:GFCXTQ Program
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 131>
Accession number:20220911735024
Title:Study on adhesive curing process and bonding property of XM-31 silicone rubber
Authors:Zheng, Xiangke (1); Wang, Peng (1); Kang, Shifa (1); Duan, Zhanjun (1); Jia, Xin (1); Shu, Linsen (2)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) Shaanxi University of Technology, Shaanxi, Hanzhong; 723001, China
Corresponding author:Zheng, Xiangke
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121660R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to obtain the microstress bonding curing process and its properties of precision optical components, various curing process schemes of XM-31 adhesive were designed and tested. Firstly, a mirror group simulation structure and hardness testing tool were developed to study the effect of the amount of six vulcanizing agents on the solidification rate of XM-31 adhesive. Secondly, the XM-31 adhesive with the best amount of curing agent was solidified under different temperature conditions.Densitometer, stretch machine, hardness tester and microscope were used to test the material properties of XM-31 adhesive after curing, so as to obtain the bonding performance of XM-31 adhesive under different solidification temperature conditions.Finally, the optimized process is applied to the bonding of optical elements in a star-sensitive lens. The results show that the optimum ratio of matrix adhesive and vulcanizing agent of XM-31 adhesive is 100:3 ∼ 100:4. The volume shrinkage rate of XM-31 adhesive under four curing temperatures were 1.82%, 1.75%, 1.63% and 1.43%, respectively. The curing temperature will significantly improve the adhesive process efficiency, but the adhesive strength and hardness will be reduced. The surface shape index PV and RMS value of a certain type of star sensitive lens can meet the design requirements, when using the preferred process of XM-31 adhesive assembly.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:13
Main heading:Hardness
Controlled terms:Meteorological instruments - Curing - Lenses - Silicones - Shrinkage - Adhesives - Stars
Uncontrolled terms:Adhesive curing process - Adhesive performance - Bonding property - Curing process - Curing temperature - Process properties - Temperature conditions - Volume shrinkage - Vulcanizing agents - XM-31 adhesive
Classification code:443.2 Meteorological Instrumentation - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 815.1.1 Organic Polymers - 951 Materials Science
Numerical data indexing:Percentage 1.43E+00%, Percentage 1.63E+00%, Percentage 1.75E+00%, Percentage 1.82E+00%
DOI:10.1117/12.2606857
Funding details: Number: -, Acronym: NWMO, Sponsor: Nuclear Waste Management Organization;
Funding text:Acknowledgements. – The study was financially supported by the Swedish Nuclear Fuel and Waste Management Co. (SKB). Thanks to Dr. Jesper Petersson (Swedpower AB) for providing the sample from the excavated ditch and for assistance during the drill core sampling, Dr. Cees-Jan de Hoog (Göteborg University) for the Pb isotopic analyses and Mario Tassinari for providing the sample from Kinnekulle. Ulf Brising (SKB) is thanked for the geological map of the area. We would also like to thank Prof. Sven Åke Larson (Göteborg University) for comments on an early version of the paper and Henrik Drake (Göteborgs University) for constructive discussions. The manuscript greatly benefited from the review comments by Dr. Ingrid Anne Munz and Dr. Kjell Billström.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 132>
Accession number:20221611967674
Title:Low Noise Driver And Bias Hardware Circuit Degisn Based On CMOS Detector
Authors:Shen, Chao (1, 2); Ma, Caiwen (1); Gao, Wei (1); Song, Zongxi (1); Wang, Fengtao (1); Li, Wei (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100039, China
Corresponding author:Ma, Caiwen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:12169CC
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with CCD detector, CMOS detector has the advantages of high integration, low power consumption, fast readout speed and low production cost. CCD detectors are used in traditional astronomical observations. At present, low-noise CMOS detectors are not used to realize spaceborne astronomical projects in the world. From the index analysis of a project, one 6K * 6K CMOS detector which developed by a company can meet application of one project?Based on this detector, designing low noise driver and bias hardware circuit. This design mainly uses LDO with low noise and high PSRR to produce stable low noise driving power supply,in addition, the driving signal waveform required by the detector is controlled by FPGA to ensure the signal integrity to avoid interference feed?The bias voltage required by the detector is generated by low-noise voltage reference device, high-resolution DAC and low-noise operational amplifier.<br/></div> © 2022 SPIE
Number of references:7
Main heading:Operational amplifiers
Controlled terms:Bias voltage - CMOS integrated circuits - Infrared detectors - Integrated circuit design - Timing circuits
Uncontrolled terms:CCD detectors - CMOS detectors - DAC - Fast readout - Hardware circuits - Higher integration - LDO - Low-power consumption - Lower noise - Lower-power consumption
Classification code:713 Electronic Circuits - 713.1 Amplifiers - 713.4 Pulse Circuits - 714.2 Semiconductor Devices and Integrated Circuits - 944.7 Radiation Measuring Instruments
Numerical data indexing:Temperature 6.00E+00K
DOI:10.1117/12.2627221
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 133>
Accession number:20220811679431
Title:Numerical Simulation on Magnetic Field Tolerance of MCP-PMTs
Authors:Li, Lili (1); Tian, Jinshou (1); Chen, Ping (1); Guo, Lehui (1); Wang, Xing (1); Liu, Hulin (1); Xue, Yanhua (1); Xin, Liwei (1); Gao, Guilong (1); He, Kai (1); Gou, Yongsheng (1); Zhang, Mingrui (1); Li, Shaohui (1); Sai, Xiaofeng (1); Liu, Baiyu (1); Xu, Xiangyan (1); Qu, Youshan (1); Zhao, Wei (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Lili(lilili2016@opt.cn)
Source title:IEEE Transactions on Nuclear Science
Abbreviated source title:IEEE Trans Nucl Sci
Volume:69
Issue:4
Issue date:April 1, 2022
Publication year:2022
Pages:850-857
Language:English
ISSN:00189499
E-ISSN:15581578
CODEN:IETNAE
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Microchannel plate photomultiplier tubes (MCP-PMTs) with high temporal resolution and low dark count rates will be used as single-photon detectors for the Super Tau-Charm Facility (STCF) proposed in China. Similar to other RICH or DIRC detectors, MCP-PMTs in the STCF need to operate properly in an axial magnetic field of about 1.5 T. We study the magnetic field tolerance of MCP-PMTs with the simulation methods based on the Furman model as a secondary electron emission model and the particle-in-cell method for tracking electrons. The effects of MCP structural parameters (aperture D , length-to-diameter ratio L/D , bias angle theta , and applied voltage U ) on the magnetic field tolerance are simulated. The results show that the smaller the D and the smaller the L/D of the MCP, the better its magnetic field tolerance. By increasing the MCP bias angle, its magnetic field tolerance increases first and then weakens. The applied voltage does not affect its magnetic field tolerance. Changing the angle between the magnetic field and the normal direction to the microchannel plate (MCP), the gain decays fastest when the magnetic field direction is parallel to the axial direction of the MCP channels; at a magnetic field direction of 60°, the MCP gain decays the slowest. For MCP-PMTs, the change in the magnetic field direction causes the alteration of the motion direction of the electron cloud in the gaps (cathode-MCP1, MCP1-MCP2, and MCP2-anode), which is the principal reason for the difference in its gain in different magnetic field directions with the same magnetic field strength. The magnetic field tolerance of different assembly methods of two MCPs (i.e., two, three, or four electrodes for applying high voltage) is simulated. The results show that two MCPs' multiplication structure with the four-electrode assembly method is an appropriate choice.<br/></div> © 1963-2012 IEEE.
Number of references:26
Main heading:Electrodes
Controlled terms:Photons - Image storage tubes - Photomultipliers - Secondary emission - Magnetic fields - Electrons - Microchannels - Bias voltage - Particle beams - Plates (structural components)
Uncontrolled terms:Aperture - Electrons clouds - Field tolerances - Magnetic field tolerance - Magnetic-field - MCP - Micro-channel plate photomultiplier tubes - Microchannel-plate photomultiplier tubes - Solid modelling
Classification code:408.2 Structural Members and Shapes - 701.2 Magnetism: Basic Concepts and Phenomena - 713 Electronic Circuits - 714.1 Electron Tubes - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Magnetic flux density 1.50E+00T
DOI:10.1109/TNS.2022.3150890
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 134>
Accession number:20231914078174
Title:Research on Clustering Algorithm of Hyperspectral Images Based on Fuzzy Kernel P System
Authors:Qiu, Shi (1); Zhang, Geng (1); Zhang, Miao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology Cas, Xi'an; 710119, China
Corresponding author:Zhang, Geng(gzhang@opt.ac.cn)
Source title:Proceedings - 2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Abbreviated source title:Proc. - IEEE/WIC/ACM Int. Jt. Conf. Web Intell. Intell. Agent Technol., WI-IAT
Part number:1 of 1
Issue title:Proceedings - 2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Issue date:2022
Publication year:2022
Pages:731-737
Language:English
ISBN-13:9781665494021
Document type:Conference article (CA)
Conference name:2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Conference date:November 17, 2022 - November 20, 2022
Conference location:Virtual, Online, Canada
Conference code:188190
Sponsor:Association for Computing Machinery (ACM); IEEE Computer Society Technical Committee on Intelligent Informatics (TCII); IOS Press; Web Intelligence Consortium (WIC); Wilfrid Laurier University; York University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">According to the difficulty of spectral image clustering, an image clustering algorithm is proposed based on fuzzy kernel P system. Through the analysis of fuzzy clustering and kernel clustering, the fuzzy kernel system is built to optimize the organizational P system, and all cells are coordinated to calculate the optimal clustering center in the mapping space to achieve parallel computing. It can reduce the sensitivity of the initial clustering center, improve the global search ability of the algorithm, avoid falling into the local minimum, and improve the clustering performance of the algorithm.<br/></div> © 2022 IEEE.
Number of references:31
Main heading:Clustering algorithms
Uncontrolled terms:Clusterings - Fuzzy - Fuzzy kernel - HyperSpectral - Image-based - Kernel - Organization P system - P systems - Parallel com- puting - Spectral images
Classification code:903.1 Information Sources and Analysis
DOI:10.1109/WI-IAT55865.2022.00116
Funding details: Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;
Funding text:This work is supported by Science and Technology Rising Star of Shaanxi Youth (2021KJXX-61). The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No.A2206)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 135>
Accession number:20212310473040
Title:Mutual Attention Inception Network for Remote Sensing Visual Question Answering
Authors:Zheng, Xiangtao (1); Wang, Binqiang (1); Du, Xingqian (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing images (RSIs) containing various ground objects have been applied in many fields. To make semantic understanding of RSIs objective and interactive, the task remote sensing visual question answering (VQA) has appeared. Given an RSI, the goal of remote sensing VQA is to make an intelligent agent answer a question about the remote sensing scene. Existing remote sensing VQA methods utilized a nonspatial fusion strategy to fuse the image features and question features, which ignores the spatial information of images and word-level information of questions. A novel method is proposed to complete the task considering these two aspects. First, convolutional features of the image are included to represent spatial information, and the word vectors of questions are adopted to present semantic word information. Second, attention mechanism and bilinear technique are introduced to enhance the feature considering the alignments between spatial positions and words. Finally, a fully connected layer with softmax is utilized to output an answer from the perspective of the multiclass classification task. To benchmark this task, a RSIVQA dataset is introduced in this article. For each of more than 37 000 RSIs, the proposed dataset contains at least one or more questions, plus corresponding answers. Experimental results demonstrate that the proposed method can capture the alignments between images and questions. The code and dataset are available at https://github.com/spectralpublic/RSIVQA.<br/></div> © 1980-2012 IEEE.
Number of references:49
Main heading:Remote sensing
Controlled terms:Alignment - Semantics
Uncontrolled terms:Attention mechanisms - Fusion strategies - Multi-class classification - Question Answering - Remote sensing images - Semantic understanding - Spatial informations - Spatial positions
Classification code:601.1 Mechanical Devices
DOI:10.1109/TGRS.2021.3079918
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 136>
Accession number:20212310473922
Title:Unsupervised Change Detection by Cross-Resolution Difference Learning
Authors:Zheng, Xiangtao (1); Chen, Xiumei (1); Lu, Xiaoqiang (1); Sun, Bangyong (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Change detection (CD) aims to identify the differences between multitemporal images acquired over the same geographical area at different times. With the advantages of requiring no cumbersome labeled change information, unsupervised CD has attracted extensive attention of researchers. Multitemporal images tend to have different resolutions as they are usually captured at different times with different sensor properties. It is difficult to directly obtain one pixelwise change map for two images with different resolutions, so current methods usually resize multitemporal images to a unified size. However, resizing operations change the original information of pixels, which limits the final CD performance. This article aims to detect changes from multitemporal images in the originally different resolutions without resizing operations. To achieve this, a cross-resolution difference learning method is proposed. Specifically, two cross-resolution pixelwise difference maps are generated for the two different resolution images and fused to produce the final change map. First, the two input images are segmented into individual homogeneous regions separately due to different resolutions. Second, each pixelwise difference map is produced according to two measure distances, the mutual information distance and the deep feature distance, between image regions in which the pixel lies. Third, the final binary change map is generated by fusing and binarizing the two cross-resolution difference maps. Extensive experiments on four datasets demonstrate the effectiveness of the proposed method for detecting changes from different resolution images.<br/></div> © 1980-2012 IEEE.
Number of references:50
Main heading:Deep neural networks
Controlled terms:Pixels - Change detection
Uncontrolled terms:Different resolutions - Geographical area - Homogeneous regions - Multi-temporal image - Mutual informations - Resizing operations - Sensor properties - Unsupervised change detection
Classification code:461.4 Ergonomics and Human Factors Engineering
DOI:10.1109/TGRS.2021.3079907
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY04-03,62011530021, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03, and in part by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China under Grant 62011530021.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 137>
Accession number:20224312992538
Title:CSTGAN: Cycle Swin Transformer GAN for Unpaired Infrared Image Colorization (Open Access)
Authors:Zhao, Mingfan (1, 2); Feng, Guirong (3); Tan, Jiahai (4, 5); Zhang, Ning (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Province, Xi'an, China; (2) University of Chinese Academy of Sciences, Shijingshan District, Beijing, China; (3) School of Electronic Engineering, Xi'an University of Post and Telecommunications, Shaanxi Province, Xi'an, China; (4) School of Optoelectronic Engineering, Xi'an Technological University, Shaanxi Province, Xi'an, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Province, Xi'an, China
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:CCRIS 2022 - Conference Proceeding: 2022 3rd International Conference on Control, Robotics and Intelligent System
Issue date:August 26, 2022
Publication year:2022
Pages:241-247
Language:English
ISBN-13:9781450396851
Document type:Conference article (CA)
Conference name:3rd International Conference on Control, Robotics and Intelligent System, CCRIS 2022
Conference date:August 26, 2022 - August 28, 2022
Conference location:Virtual, Online, China
Conference code:183363
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared images can be captured in harsh conditions such as low light and foggy weather, which provides an effective solution for image capture throughout the day. However, the low contrast and blurred object boundaries of infrared images hinder human interpretation and the application of computer vision algorithms. Colorizing infrared images is a significant and effective method to promote infrared image understanding. Image-to-image translation methods based on generative adversarial networks are currently the main methods for colorizing infrared images. The generative adversarial network designed by Transformer overcomes the disadvantage of weak global information capture ability caused by the convolutional generative adversarial network product focusing on local features. This paper proposed a new method called Cycle Swin Transformer Generative Adversarial Networks (CSTGAN) based on Cycle-Consistent Generative Adversarial Networks. The proposed method redesigns the generator with Swin Transformer and convolution layers, and modified the discriminator and loss function. The proposed method combines the advantages of convolution and Transformer to obtain accurate mapping between infrared image domain and visible light image domain, which reduces the artifacts and distortions caused by the existing infrared image colorization methods. In addition, we collected and produced a near-infrared image colorization dataset named NIR2RGB. Extensive experimental results show that the proposed method outperforms the previous methods on the FID and KID metrics on the public datasets RGB-NIR Scene and MFNet as well as produced NIR2RGB.<br/></div> © 2022 ACM.
Number of references:33
Main heading:Generative adversarial networks
Controlled terms:Convolution - Infrared devices - Infrared imaging - Light
Uncontrolled terms:Condition - Cycle generative adversarial network - Effective solution - Image captures - Image colorizations - Image domain - Infrared image colorization - Low contrast - Low light - Swin transformer
Classification code:716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 741.1 Light/Optics - 746 Imaging Techniques
DOI:10.1145/3562007.3562053
Funding details: Number: 2020TD-015, Acronym: -, Sponsor: -;Number: 62106197, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China under Grants 62106197, in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020TD-015, in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 138>
Accession number:20223612686016
Title:Development of a large-field streak tube for underwater imaging lidar
Authors:Fang, Mengyan (1, 2); Xue, Yanhua (1); Ji, Chao (1, 2); Yang, Bingqing (1); Xu, Guoquan (3); Chen, Fubin (3); Li, Guangying (1, 2); Han, Wenjie (4); Xu, Ke (3); Cheng, Guanghua (5); Li, Shaohui (1); Wang, Junfeng (1); Liu, Baiyu (1); Zhao, Wei (1, 2, 6); Tian, Jinshou (1, 2, 6); Wang, Xing (1, 2)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Electronic Science and Technology, National University of Defense Technology, Changsha; 410073, China; (4) The 27th Research Institute of China Electronics Technology Group Corporation, Zhengzhou; 450047, China; (5) School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an; 710072, China; (6) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Wang, Xing(wangxing@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:25
Issue date:September 1, 2022
Publication year:2022
Pages:7401-7408
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Streak tube imaging lidar (STIL) can obtain 4-D images of a target, and its performance is mainly determined by the streak tube sensor. To obtain a large field of view, we developed a streak tube with a photocathode length as large as 35.3mm, which is larger than the commonly used ST-HDR(30 mm). At the same time, the temporal resolution and dynamic spatial resolution are 60 ps and 12 lp/mm, which are very suitable to obtain accurate target coordinates for 4-D imaging. In addition, the streak tube has a high detection sensitivity of 46 mA/W at 500 nm and, hence, prospects in remote imaging. To test the performance of the streak tube, an underwater STIL experiment was conducted. Echo signal processing was performed by means of a bandpass filter and a matched filter, and then the peak detection algorithm was used to reconstruct the image. The results indicate that a spatial resolution better than 9 mm is achieved in the limpid water with a depth of 20 m, and a range accuracy of 1 cm is achieved in the turbid water with a depth of 10 m. Such a performance suggests that the large-field streak tube is of great potential for underwater target imaging and other remote imaging applications.<br/></div> ©2022 Optica Publishing Group.
Number of references:26
Main heading:Bandpass filters
Controlled terms:Image resolution - Imaging systems - Matched filters - Optical radar - Underwater acoustics - Underwater imaging
Uncontrolled terms:Imaging lidar - Large field of views - Larger fields - Performance - Remote imaging - Spatial resolution - Streak tube imaging lidars - Streak tubes - Temporal dynamics - Temporal resolution
Classification code:703.2 Electric Filters - 716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 751.1 Acoustic Waves
Numerical data indexing:Electric current 4.60E-02A, Size 1.00E+01m, Size 1.00E-02m, Size 2.00E+01m, Size 3.00E-02m, Size 3.53E-02m, Size 5.00E-07m, Size 9.00E-03m, Time 6.00E-11s
DOI:10.1364/AO.464643
Funding details: Number: 2021SR5061, Acronym: -, Sponsor: -;Number: 62075236, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020397, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:Funding. National Natural Science Foundation of China (62075236)); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2020397); Rising Research Star of Shaanxi Province (2021SR5061).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 139>
Accession number:20230413445478
Title:High-Precision Registration Algorithm of Variable Scale Heterogeneous Point Clouds Based on Intrinsic Shape Signatures Features
Authors:Liu, Chang (1); Zhang, Gaopeng (2); Du, Hubing (1); Lu, Rong (2); Zhao, Jingwei (1)
Author affiliation:(1) School of Mechatronic Engineering, Xi’an Technological University, Shaanxi, Xi'an; 710021, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China
Corresponding author:Zhang, Gaopeng
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12478
Part number:1 of 1
Issue title:Thirteenth International Conference on Information Optics and Photonics, CIOP 2022
Issue date:2022
Publication year:2022
Article number:124783V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510660632
Document type:Conference article (CA)
Conference name:13th International Conference on Information Optics and Photonics, CIOP 2022
Conference date:August 7, 2022 - August 10, 2022
Conference location:Xi'an, China
Conference code:185717
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Many space tasks, such as on-orbit servicing, space rendezvous and docking strongly rely on accurate relative position and posture collectively (referred to as pose) of spacecraft. The single measurement methods are limited to their respective advantages and disadvantages, which cannot meet the demand of non-cooperative target pose measurement in complex space situations. But due to different information sources, multi-source heterogeneous point cloud registration algorithms face problems such as noise impact, outliers, partial overlap of point clouds, difference in density of point clouds, inconsistent scales and so on. To solve this problem, based on the Scaling Iterative Closest Point (SICP) algorithm, this paper proposes a high-precision registration algorithm of variable scale heterogeneous point clouds based on intrinsic shape signatures (ISS) features. Firstly, the algorithm down samples the voxels of the point cloud to be aligned, sparseness the number of point clouds, and screens out some noise; Secondly, coarse alignment of the feature point clouds extracted by the ISS algorithm is performed by establishing a cost function containing the surface variance of the feature points and the module value of the Euclidean distance of the feature points from their centers of mass; Finally, the two-point clouds are finely aligned by the SICP algorithm. The experimental results show that the algorithm shows high robustness and well real-time performance, and can realize the accurate registration of multi-source heterogeneous point clouds with multi scales.<br/></div> © 2022 SPIE.
Number of references:7
Main heading:Cost functions
Controlled terms:Image registration - Iterative methods - Noise pollution - Orbits - Space rendezvous
Uncontrolled terms:Cloud-based - High-precision - Intrinsic shape - Multiple sensors - Point cloud registration - Point-clouds - Pose measurement - Registration algorithms - Shape signatures - Space task
Classification code:656.1 Space Flight - 723.2 Data Processing and Image Processing - 751.4 Acoustic Noise - 921.5 Optimization Techniques - 921.6 Numerical Methods
DOI:10.1117/12.2654872
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 140>
Accession number:20224813166745
Title:An Improved Small Target Detection Algorithm for SSD
Authors:Ai, Han (1, 2); Zhang, Haifeng (1); Ren, Long (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Shanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhang, Haifeng(zhanghf99@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12331
Part number:1 of 1
Issue title:International Conference on Mechanisms and Robotics, ICMAR 2022
Issue date:2022
Publication year:2022
Article number:1233108
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510657328
Document type:Conference article (CA)
Conference name:2022 International Conference on Mechanisms and Robotics, ICMAR 2022
Conference date:February 25, 2022 - February 27, 2022
Conference location:Zhuhai, China
Conference code:184317
Sponsor:Academic Exchange Information Center (AEIC)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the accuracy and robustness of the small target detection for SSD (Single Shot Multi-Box Detector) algorithm, this paper proposes an improved SSD algorithm. Firstly, the Mish activation function is introduced in the backbone network to provide more linear relationships. Secondly, a copy-reduce-paste data enhancement method is proposed to ensure a more balanced train. In the multi-scale detection stage, feature enhancement module and feature fusion strategy guided by channel attention mechanism are used to improve the feature information. At the same time, modify the loss function to improve the model training effect. Experiments on the VOC2007+2012 dataset show that the detection performance of the proposed algorithm is better than that of the SSD algorithm.<br/></div> © 2022 SPIE.
Number of references:13
Main heading:Feature extraction
Controlled terms:Signal detection
Uncontrolled terms:Activation functions - Attention mechanisms - Back-bone network - Feature enhancement - Improved SSD algorithm - Linear relationships - Single-shot - Small target detection - SSD algorithm - Target detection algorithm
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1117/12.2652290
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 141>
Accession number:20221211831521
Title:Optical Design of Optical Passive Half-Athermalization Zoom Lens with High Zoom Ratio
Title of translation:大变倍比光学被动半无热化变焦系统设计
Authors:Yan, Aqi (1); Cui, Wen (1, 2); Dong, Sen (1)
Author affiliation:(1) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yan, Aqi(yanaqi@opt.ac.cn)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:42
Issue:4
Issue date:February 25, 2022
Publication year:2022
Article number:0422001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In view of traditional zoom lens cannot consistently and clearly image during the whole zoom process when the ambient temperature is changed, which needs to focus frequently at middle focal length position. This paper proposes a new design method which is named optical passive half-athermalization zoom lens design, and an optical passive half-athermalization zoom lens is designed by this novel method. The focal length of zoom lens is 301000 mm, spectrum wavelength is 486656 nm, and F-number is F<inf>4.4</inf>F<inf>8</inf>. Most importantly, the shortest focal length position of zoom lens is optical passive athermalization. The optical system has compact structure and excellent imaging quality, and based on method of passive half-athermalization design, optical system at any temperature between -40 ℃ and +60 ℃, which only need to focus once at the longest focal length position of zoom lens, that can ensure consistently and clearly image during the whole zoom process. There is no need to focus frequently in any middle zoom position, and the temperature adjustment of zoom lens is only -0.56+0.82 mm, which have verified method of optical passive half-athermalization zoom lens design correctly. According to this method, zoom lens not only overcomes trouble of frequently focusing in traditional zoom lens, but also greatly reduces amount of temperature focusing and benefits on fast focusing.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:11
Main heading:Focusing
Controlled terms:Image processing - Optical systems - Optical design
Uncontrolled terms:Athermalization - Design method - Focal lengths - Image consistency - Lens designs - Optical passive athermalization - Optical zoom systems - Optical- - Passive athermalization - Zoom lens
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Capacitance 4.40E+00F, Capacitance 4.86656E+05F, Size 3.01E+02m, Size 8.20E-04m
DOI:10.3788/AOS202242.0422001
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 142>
Accession number:20221411925241
Title:Design of MWIR Hadamard coded imaging spectrometer
Title of translation:Hadamard编码红外光谱成像系统设计
Authors:Yang, Ying (1); Hu, Bingliang (1); Li, Libo (1); Wang, Shuang (1); Yan, Qiangqiang (1)
Author affiliation:(1) CAS Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yan, Qiangqiang(yanqiangqiang@opt.ac.cn)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:30
Issue:6
Issue date:March 25, 2022
Publication year:2022
Pages:641-650
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In a space Hadamard transform spectral imager (SHTSI) system, encoding the template using digital mirror devices (DMDs) can ensure that the system is miniaturized and lightweight, and has high resolution and high frame rate. However, modulation using DMD causes the focus plane of SHTSI to tilt; consequently, the resultant image obtained from the spectrometer does not match the cooled shield of the detector. This causes image degradation and field of view loss. In this paper, a novel SHTSI system design is proposed to improve the quality of the final image. The design also addresses the issues of cold stop aperture mismatch and field of view accuracy. In this scheme, the design of the front lens contains a tilted and off-center lens, which tilts the image of the object by 24° with respect to the primary focus plane. Based on this method, a SHTSI optical system is designed, and the spot diagram RMS of the full field of the system was calculated to be less than 5 µm. This ensures that the system generates an even image. According to this design scheme, a SHTSI principle model machine is developed. The experiment results show that the evaluation of the restored spectral angular distance of the SHTSI system is better than 0.052.<br/></div> © 2022, Science Press. All right reserved.
Number of references:21
Main heading:Hadamard transforms
Controlled terms:Optical systems - Mirrors - Image enhancement - Spectroscopy
Uncontrolled terms:Coded imaging - Digital mirror devices - Field of views - Hadamard transform spectral imager - Imaging spectrometers - MWIR spectral imaging - Optical designing - Optical- - Spectral imagers - Spectral imaging
Classification code:741.3 Optical Devices and Systems - 921.1 Algebra
DOI:10.37188/OPE.20223006.0641
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 143>
Accession number:20223412609216
Title:Twisted Gaussian Schell-model breathers and solitons in strongly nonlocal nonlinear media (Open Access)
Authors:Zhang, Shaohua (1); Zhou, Zhenglan (1); Zhou, Yuan (2, 3); Xu, Huafeng (4); Yuan, Yangsheng (5); Han, Yashuai (1); Zhou, Zhengxian (1); Yao, Baoli (2); Qu, Jun (1)
Author affiliation:(1) Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Anhui, Wuhu; 241000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Anhui, Huainan; 232001, China; (5) Shandong Provincial Engineering and Technical Center of Light Manipulations, Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan; 250014, China
Corresponding author:Qu, Jun(qujun70@ahnu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:18
Issue date:August 29, 2022
Publication year:2022
Pages:32019-32030
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Based on the Snyder-Mitchell linear model and the cross-spectral density (CSD) function, the analytical propagation formula of twisted Gaussian Schell-model (TGSM) beams in strongly nonlocal nonlinear medium (SNNM) is derived. Then the propagation characteristics of TGSM beam are studied. It is found that the soliton radius is jointly determined by the initial power, coherence length, and twist factor; the degree of spatial coherence is adjusted by changing the twist factor without affecting the soliton intensity. In the case of non-soliton properties, there is a threshold of coherence length which makes partially coherent beams have the same evolution law as completely coherent beams. Furthermore, increasing the twist factor, decreasing the coherence length and initial power can improve the beam quality of the beam propagating in SNNM.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:31
Main heading:Solitons
Controlled terms:Coherent light - Gaussian beams - Nonlinear systems - Spectral density
Uncontrolled terms:Coherence lengths - Cross spectral densities - Gaussian Schell model - Gaussian-schell models - Linear modeling - Nonlocal nonlinear media - Power - Spectral density function - Twist factors - Twisted Gaussian Schell-model beams
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 961 Systems Science
DOI:10.1364/OE.466117
Funding details: Number: 11974219,12074005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST202103, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:Funding. National Natural Science Foundation of China (12074005, 11974219); State Key Laboratory of Transient Optics and Photonics (SKLST202103).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 144>
Accession number:20231914063898
Title:Image noise recognition algorithm based on data enhancement
Authors:Guan, Lei (1, 2); Huang, Jijiang (1); Wang, Hao (1); Chen, Weining (1); Lu, Rong (1, 2); Chen, Zhiqiang (1, 2)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'an Institute of Optics and Precision Mechanics, University of Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Guan, Lei(guanleiucas@163.com)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:Proceedings of 2022 4th International Conference on Robotics, Intelligent Control and Artificial Intelligence, RICAI 2022
Issue date:December 16, 2022
Publication year:2022
Pages:957-962
Language:English
ISBN-13:9781450398343
Document type:Conference article (CA)
Conference name:4th International Conference on Robotics, Intelligent Control and Artificial Intelligence, RICAI 2022
Conference date:December 16, 2022 - December 18, 2022
Conference location:Virtual, Online, China
Conference code:188040
Sponsor:Guangdong High Performance Computing Society; Guangdong University of Science and Technology
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Image denoising has always been an indispensable part of image processing tasks, and the quality of image preprocessing algorithms is directly related to the effect of subsequent image processing. Most existing denoising algorithms explicitly define the type and distribution of noise, for example, the artificially set additive Gaussian white noise which is based on prior knowledge. But on the one hand, the actual real image noise is not equivalent to Gaussian noise. The noise distribution of different noise types such as Gaussian, Salt and pepper noise, Rayleigh, Uniform noise is very different. It is not possible to generalize in the process of image denoising. On the other hand, images in real scenarios often have problems such as unrepeatable acquisition, lack of data information, or even only single image information, which can't support large-scale deep learning and discrimination. The above two points limit the application of most algorithms in real scenarios. In this paper, a new real image noise recognition algorithm is proposed. Aiming at the problem of single noise image and lack of prior knowledge in real scenes, the noise distribution is first learned and the image enhancement dataset is generated through dual-channel simulation in traditional and deep learning to solve the problem of lack of real image data. Then, the noise is identified by the deep learning pre-Trained model, and the noise type that most closely matches the noise distribution of the real image is found. Thus, the influence of prior knowledge of image noise on the denoising process is freed for the subsequent denoising task. Experimental results show that our algorithm framework is not limited by the size of real images and datasets, and does not require prior knowledge of real scenes. The algorithm has good recognition accuracy for different types of image noise, and good robustness for images of various scenes, which provides data support and accuracy guarantee for a series of tasks such as subsequent denoising, classification, recognition, and tracking of computer vision.<br/></div> © 2022 ACM.
Number of references:21
Main heading:Image enhancement
Controlled terms:Deep learning - Gaussian distribution - Gaussian noise (electronic) - Learning systems - Salt and pepper noise - White noise
Uncontrolled terms:Complementation - Dual channel - Dual-channel complementation - Image noise - Multi-scale multi-scene - Multi-scales - Noise distribution - Noise recognition - Prior-knowledge - Real images
Classification code:461.4 Ergonomics and Human Factors Engineering - 922.1 Probability Theory - 922.2 Mathematical Statistics
DOI:10.1145/3584376.3584547
Funding details: Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work has been supported by the National Natural Science Foundation of China (Grant No. 51905529)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 145>
Accession number:20230713591844
Title:Research on Automatic Cutting Method of Oil Cone Sleeve Sample
Authors:Xiaolei, Liu (1); Jie, Zhang (1); Wenhui, Fan (2)
Author affiliation:(1) Chinese Flight Test Establishment, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Xiaolei, Liu(995256416@qq.com)
Source title:Proceedings - 2022 37th Youth Academic Annual Conference of Chinese Association of Automation, YAC 2022
Abbreviated source title:Proc. - Youth Acad. Annu. Conf. Chin. Assoc. Autom., YAC
Part number:1 of 1
Issue title:Proceedings - 2022 37th Youth Academic Annual Conference of Chinese Association of Automation, YAC 2022
Issue date:2022
Publication year:2022
Pages:13-17
Language:English
ISBN-13:9781665465366
Document type:Conference article (CA)
Conference name:37th Youth Academic Annual Conference of Chinese Association of Automation, YAC 2022
Conference date:November 19, 2022 - November 20, 2022
Conference location:Beijing, China
Conference code:186447
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Modern aerial refueling aircraft and its aerial refueling technology have become an important measure to enhance the mobility and strike capability of aviation forces, and are highly valued by countries all over the world. With the continuous development of computer image and machine learning, it is possible to locate and identify the refueling cone sleeve in real time in the process of aerial refueling docking. At present, the mainstream method is target recognition based on deep learning, but the premise of deep learning is to cut a large number of data samples. Aiming at the problem that deep learning requires a lot of manpower and energy to cut training samples, this paper proposes an automatic cutting method of cone sleeve training samples based on the combination of color features and circular features to realize the automatic pre-processing of massive sample data Cutting, greatly improve work efficiency, lay the foundation for UAV autonomous refueling.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Deep learning
Controlled terms:Aircraft accidents - Antennas - Learning systems
Uncontrolled terms:Aerial refueling - Aerial refueling aircraft - Automatic location - Circle location - Color features - Cutting methods - Mobility capabilities - Sample clipping - Strike capability - Training sample
Classification code:461.4 Ergonomics and Human Factors Engineering - 652.1 Aircraft, General - 914.1 Accidents and Accident Prevention
DOI:10.1109/YAC57282.2022.10023888
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 146>
Accession number:20222612294797
Title:Adaptive octree 3D image reconstruction based on plane patch
Title of translation:基于平面补丁的自适应八叉树三维图像重建
Authors:Yao, Cheng (1, 2); Ma, Caiwen (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Yao, Cheng(798199284@qq.com); Yao, Cheng(798199284@qq.com)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:30
Issue:9
Issue date:May 10, 2022
Publication year:2022
Pages:1113-1122
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, an adaptive octree convolutional neural network based on plane patches is proposed for effective 3D shape encoding and decoding. Unlike volume-based or octree-based convolutional neural network (CNN) methods, which represent 3D shapes with the same voxel resolution, the proposed method can use planes and adaptively represent the 3D shapes of octree nodes with different levels. The patch models the 3D shape within each octree node, whereby the patch-based adaptive representation is utilized in the proposed adaptive patch octree convolutional neural network (O-CNN) encoder and decoder for the encoding and decoding of 3D shapes. The adaptive patch O-CNN encoder takes the plane patch normal and displacement as input and performs three-dimensional convolution on the octree nodes of each level, whereas the adaptive patch O-CNN decoder infers each level. The shape occupancy rate and subdivision state of the octree node as well as the best plane normal and displacement of each leaf octree node are estimated. As a general framework for 3D shape analysis and generation, adaptive patch O-CNN not only reduces memory and computational costs but also exhibits better shape generation capabilities than existing 3D-CNN methods. Shape prediction is performed using a single image to verify the efficiency and effectiveness of the generation task of the adaptive O-CNN. The chamfer distance error is 0.274, which is lower than that of OctGen (0.294), resulting in a better reconstruction effect.<br/></div> © 2022, Science Press. All right reserved.
Number of references:28
Main heading:Computer vision
Controlled terms:Convolution - Convolutional neural networks - Decoding - Encoding (symbols) - Network coding
Uncontrolled terms:3-D shape - 3D image reconstruction - Adaptive octrees - Convolutional neural network - Encoding and decoding - Neural network method - Neural-networks - Octrees - Shape generations - Three-dimensional reconstruction
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 741.2 Vision
DOI:10.37188/OPE.20223009.1113
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 147>
Accession number:20224413027433
Title:Holographic Imaging through Scattering Medium Based on Statistical Average Method
Title of translation:基于统计平均方法实现透过散射介质全息成像
Authors:Zhang, Hui (1, 2); Zhang, Zaikun (1, 2); Kong, Depeng (1); He, Zhengquan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:He, Zhengquan(zhqhe@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:6
Issue date:June 1, 2022
Publication year:2022
Article number:0609001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Light is an important vehicle for observing and obtaining image information about objects and is an important way of perceiving the environment. However， in the natural environment， there are often small particles or obstacles between the observer and the observed object that prevent direct imaging of the observed object. When there is a scattering medium in the imaging optical path， photons are scattered with the scattering medium and the incident wavefront of the light is destroyed， resulting in a change in the direction of light propagation， and the photoelectric imaging system does not work properly under these conditions. To solve the problem of not being able to image the observed object clearly in the presence of the scattering medium， in this paper， statistical averaging and lensless Fourier transform digital holography are used to achieve imaging through the scattering medium. The speckle is averaged through the rotating scattering medium， and the exposure time of the camera is increased so that the time average of the scattering field replaces the collective average， thus eliminating the effect of the random phase introduced by the scattering medium on the imaging process. This method of digital holography using statistical averaging and lensless Fourier transform has the advantages of simple and compact optical path structure， fast reconstruction speed， and low cost. Compared to wavefront shaping technology， transmission matrix technology， adaptive optics technology， and other methods of imaging through scattering media， this method does not require phase correction and complex image processing， target scanning， wavefront shaping， and other complicated operations.The experiments firstly investigate the effects of ground glass rotation speed and CCD exposure time on the peak signal-to-noise ratio of reconstructed images. The experiments show that different rotation speeds require different exposure times to achieve the highest peak signal-to-noise ratio， and the faster the rotation speed， the shorter the time required to reach the highest peak signal-to-noise ratio. The highest peak signal-to-noise ratio of 21.44 dB was obtained for the four sets of data at a rotation speed of 1.5 r/min and an exposure time of 800 ms. After obtaining the optimal experimental conditions， the imaging experiment through a single scattering medium was carried out. The laser light is divided into two beams by the beam splitter， one beam of light irradiates the object for transmission or reflection and then passes through the rotating ground glass as the object light， and the other beam is reflected by the mirror. After the incident on the convex lens， the convex lens converts the light beam from a plane wave to a spherical wave emitted by a point light source， to meet the conditions of lensless Fourier transform digital holographic recording. Then the reference light and the object light interfere after being combined by the beam combiner， and finally， the interference speckle image is recorded by the CCD. The experiments show that the method can reconstruct the object information for both transmissive resolution plates and reflective dolls and coins. On this basis， to solve the problem that actual imaging scenes rarely have a scattering medium with rotation or small displacement， we extend the application scenario of the method by introducing a stationary scattering medium. Experiments are carried out by loading a random speckle image on a spatial light modulator to simulate a stationary scattering medium. The experiments show that although the imaging quality is reduced compared to that through a single rotating scattering medium， the method is still able to image the target object clearly and achieve imaging through a double scattering medium. Finally， the reconstructed image is subjected to Butterworth high-pass filtering， and the contrast of the reconstructed image is effectively improved after the filtering.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:19
Main heading:Signal to noise ratio
Controlled terms:Adaptive optics - Glass - Holography - Incident light - Light transmission - Optical data processing - Rotation - Wavefronts
Uncontrolled terms:Condition - Digital holography - Exposure-time - Ground glass - Optical path - Peak signal to noise ratio - Reconstructed image - Rotation speed - Scattering medium - Statistical average
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 743 Holography - 746 Imaging Techniques - 812.3 Glass - 931.1 Mechanics
Numerical data indexing:Angular velocity 2.505E-02rad/s, Decibel 2.144E+01dB, Time 8.00E-01s
DOI:10.3788/gzxb20225106.0609001
Funding details: Number: 62071465, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No. 62071465）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 148>
Accession number:20222412233235
Title:Research on Near-infrared Spatial Heterodyne Raman Spectrometer
Title of translation:近红外空间外差拉曼光谱仪研究
Authors:Fan, Bozhao (1, 2); Feng, Yutao (1); Wang, Quan (1); Gao, Chi (1, 2); Wu, Yang (1, 2); Han, Bin (1, 2); Chang, Chenguang (1); Li, Juan (1); Li, Yiru (1, 2); Zhao, Hengxiang (1); Fu, Di (1)
Author affiliation:(1) Xi'an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:5
Issue date:May 25, 2022
Publication year:2022
Article number:0530001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Spatial Heterodyne Raman Spectroscopy (SHRS) is a new type of Raman spectroscopy detection technology, which has the advantage of high throughput, high spectral resolution, high sensitivity and no moving parts. SHRS can meet the high-sensitivity detection requirements of weak Raman scattered light, and can also obtain clear and sharp Raman spectra. For Raman spectrometers, fluorescence is an inevitable background signal. The fluorescence intensity and the Raman intensity are approximately inversely proportional to the fourth power of the wavelength, so the excitation wavelength of near-infrared light has lower fluorescence than visible light. The excitation wavelengths of near-infrared light are mostly 785 nm, 830 nm and 1 064 nm, of which the shorter 785 nm has larger fluorescence. Although the 1064 nm excitation light has a weaker fluorescence, it requires the near-infrared InGaAs focal plane. Compared with visible detectors, it has higher noise, lower sensitivity and resolution. Therefore, this article chooses the wavelength of 830 nm as the excitation light for Raman spectroscopy detection, and its fluorescence is lower than that of 785 nm. On the other hand, the visible detectors can be used for high-sensitivity detection. For the excitation wavelength of 830 nm, this paper designs, simulates, develops and tests SHRS. The Littrow wavelength of the spectrometer is 842 nm, the theoretical spectral sampling interval is 2.96 cm<sup>-1</sup>, and the theoretically Raman shift range is 171.71~3 031.04 cm<sup>-1</sup>. The spatial heterodyne interferometer adopts integrated adhesive technology. To increase the throughput, the field-widened prisms are added to the interferometer. The field angle tolerance of the interferometer is selected to be ±2° to ensure the contrast of the interferogram in actual work, and the corresponding contrast of the ideal interferogram is better than 0.98. The fringe-imaging lens group selects a double telecentric lens group with a magnification of 1. The telecentric configuration guarantees the uniform illumination of the image surface, and the symmetrical structure can effectively balance aberrations and further enhance the stability of the system. A checkerboard target is used to test the processed fringe-imaging lens group. The measured average magnification is 1.001 9 and the relative distortion is 0.19%. The Kr lamp is used as the input light of the system to verify the design parameters of the SHRS prototype. According to the positions of the two spectral lines 877.675 nm and 892.869 nm of the Kr lamp and the corresponding Raman shift, the actual spectral sampling interval is 2.918 2 cm<sup>-1</sup>. The smaller value compared with the design value is mainly due to the dispersion of the field-widened prism. The actual Littrow wavelength is 841.95 nm, which is close to the theoretical value. The detector selected in this paper does not respond to light with a wavelength greater than 1 000 nm, so the actual Raman shift range is 171.01~2 048.19 cm<sup>-1</sup>. The design parameter and the simulation of the system are verified. In the Fourier transform of the interferogram to the spectrogram, apodization is needed to suppress the side lobes, and different apodization functions have different degrees of spectral line broadening, resulting in different actual spectral resolution. In rectangular function apodization, the spectral resolution is about 1.207 times the theoretical spectral sampling interval. The effective spectral resolution of the SHRS prototype is 3.35 cm<sup>-1</sup>. An important parameter to measure the performance of Raman spectrometer is the Signal-to-Noise Ratio (SNR) of the Raman spectrum. We choose the peak intensity of the Raman spectrum after removing the baseline as the signal intensity, and the standard deviation after removing the baseline from the Raman spectrum peak area as the noise, and use the ratio of the two as SNR of the measured Raman spectrum. In the experiment, the excitation light power is 500 mW, and the integration time is 10 s. First, the standard Raman sample cyclohexane is tested. SNR of the main Raman peak at 795.5 cm<sup>-1</sup> is 913, and SNR of the weakest Raman peak at 1 341 cm<sup>-1</sup> is 15. It can be verified that the SHRS prototype has good Raman spectrum measurement capabilities, as well as high sensitivity and SNR. Secondly, the solid samples calcium carbonate, calcium sulfate and potassium sulfate are tested. These samples are all strong Raman active substances, and the Raman spectrum peaks of various substances can be accurately identified, and SNR of the main Raman spectrum peaks is greater than 300. Finally, experiments are carried out on 75% alcohol solution, glycerin and glucose powder. The Raman activity of these samples is relatively weak, and there are obvious baselines in the measured Raman spectra, indicating that there is a certain fluorescent background in the spectra. However, a clear and accurate Raman spectrum is still obtained, and the main Raman spectrum peaks of various substances can be accurately obtained, and SNR of each spectrum peak is greater than 20. In general, SHRS has higher detection sensitivity and better stability and can meet the analytical requirements of Raman spectroscopy detection. It has certain advantages in the Raman detection of high-fluorescence background substances and has certain development potential in biomedicine, food safety, geological prospecting, planetary exploration, etc.<br/></div> © 2022, Science Press. All right reserved.
Number of references:24
Main heading:Signal to noise ratio
Controlled terms:Adhesives - Fluorescence - Gallium alloys - Image enhancement - Indium alloys - Infrared devices - Interferometers - Interferometry - Light - Optical design - Optical systems - Semiconducting indium gallium arsenide - Semiconductor alloys - Spectral resolution - Spectrometers - Spectroscopy - System stability
Uncontrolled terms:Excitation light - Excitation wavelength - Interferograms - Near-infrared - Raman shift - Raman spectrometers - Sampling interval - Spatial heterodyne - Spectral sampling - Spectrum peaks
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1 Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments - 941.4 Optical Variables Measurements - 961 Systems Science
Numerical data indexing:Percentage 1.90E-01%, Percentage 7.50E+01%, Power 5.00E-01W, Size 0.00E00m, Size 1.064E-06m, Size 2.00E-02m, Size 2.96E-02m, Size 3.104E-01m, Size 3.35E-02m, Size 3.41E+00m, Size 4.819E-01m, Size 6.40E-08m, Size 7.85E-07m, Size 7.955E+00m, Size 8.30E-07m, Size 8.4195E-07m, Size 8.42E-07m, Size 8.77675E-07m, Size 8.92869E-07m, Time 1.00E+01s
DOI:10.3788/gzxb20225105.0530001
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB 2016A07, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931,E1294301, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Foundation item：National Natural Science Foundation of China（No. 41005019），West Light Foundation of the Chinese Academy of Sciences（No. XAB 2016A07），Natural Science Basic Research Program of Shaanxi Province（No. 2019JQ-931），West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences（No. E1294301）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 149>
Accession number:20220911734953
Title:Imaging through scattering medium based on lensless Fourier transform digital holography
Authors:Zhang, Hui (1, 2); Wang, Ruiduo (1); Zhang, Zaikun (1, 2); He, Zhengquan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121665X
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Recovering information of an object hidden behind turbid media has a vast range of applications. People have been trying many ways to achieve this goal. In this paper, we use lensless Fourier transform digital holography and statistical average to retrieve object information from speckle field. The relationship between parameters of ground glass and peak signal-tonoise ratio of reconstructed image is explored by establishing a rotating ground glass interferometric imaging system. The light beam emitted from the laser is divided into two beams by the beam splitter. One beam passes through the rotating ground glass after being reflected by the object (i.e. object light), and the other beam passes through the reflector and convex lens as a reference light, and then interferes with the object light. Finally the interference speckle pattern is captured by a CCD camera. Experiment results show that there is an optimal solution between the rotation speed of ground glass and the peak signal-to-noise ratio of the reconstructed image.This method has the advantages of compact system construction, easy implementation and fast reconstruction, since it does not require phase correction, complex image processing, scanning object or wavefront shaping.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:16
Main heading:CCD cameras
Controlled terms:Speckle - Holography - Image reconstruction - Statistical methods - Glass - Signal to noise ratio - Turbidity
Uncontrolled terms:Digital holography - Ground glass - Lensless Fourier transform digital holography - Object information - Reconstructed image - Scattering medium - Signal to noise (S/N) ratios - Speckle field - Statistical average - Turbid media
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 742.2 Photographic Equipment - 743 Holography - 746 Imaging Techniques - 812.3 Glass - 922.2 Mathematical Statistics
DOI:10.1117/12.2617699
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 150>
Accession number:20222612298163
Title:Angiodynamic and optical coupling analysis of skin tissue model under finite pressure
Title of translation:有限压力下皮肤组织模型的血管动力学及光学耦合分析
Authors:Zhao, Hetong (1, 2); Zhou, Liang (1); Liu, Zhaohui (1); Qiao, Wenlong (1); Sun, Xiaoxiao (1); Jiang, Le (1); Lyu, Yuanyuan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhou, Liang(zhouliang@opt.ac.cn)
Source title:Shengwu Yixue Gongchengxue Zazhi/Journal of Biomedical Engineering
Abbreviated source title:Shengwu Yixue Gongchengxue Zazhi/J. Biomed. Eng.
Volume:39
Issue:3
Issue date:June 25, 2022
Publication year:2022
Pages:527-536
Language:Chinese
ISSN:10015515
Document type:Journal article (JA)
Publisher:West China Hospital, Sichuan Institute of Biomedical Engineering
Abstract:<div data-language="eng" data-ev-field="abstract">The pulse amplitude of fingertip volume could be improved by selecting the vascular dense area and applying appropriate pressure above it. In view of this phenomenon, this paper used Comsol Multiphysics 5.6 (Comsol, Sweden), the finite element analysis software of multi-physical field coupling simulation, to establish the vascular tissue model of a single small artery in fingertips for simulation. Three dimensional Navier-Stokes equations were solved by finite element method, the velocity field and pressure distribution of blood were calculated, and the deformation of blood vessels and surrounding tissues was analyzed. Based on Lambert Beer's Law, the influence of the longitudinal compression displacement of the lateral light surface region and the tissue model on the light intensity signal is investigated. The results show that the light intensity signal amplitude could be increased and its peak value could be reduced by selecting the area with dense blood vessels. Applying deep pressure to the tissue increased the amplitude and peak of the signal. It is expected that the simulation results combined with the previous experimental experience could provide a feasible scheme for improving the quality of finger volume pulse signal.<br/></div> Copyright ©2022 Journal of Biomedical Engineering. All rights reserved.
Number of references:23
Main heading:Blood vessels
Controlled terms:Blood - Computer software - Finite element method - Navier Stokes equations - Tissue - Velocity
Uncontrolled terms:Angiodynamic - Coupling analysis - Finite elements simulation - Light intensity signals - Optical couplings - Photoelectricvolumetric pulse wave signal - Pulse amplitude - Pulse wave signal - Skin tissue - Tissue models
Classification code:461.2 Biological Materials and Tissue Engineering - 723 Computer Software, Data Handling and Applications - 921.2 Calculus - 921.6 Numerical Methods
DOI:10.7507/1001-5515.202106039
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 151>
Accession number:20221611967855
Title:Simulation and experimental investigation on linear expansion micro-stress assembly process of adhesive bonded mirror
Authors:Zheng, Xiang-Ke (1); Kang, Shi-Fa (1); Wang, Peng (1); Li, Hua (1); Shu, Lin-Sen (2)
Author affiliation:(1) Xi'an institute of optices and precision mechanics of cas, Xi'an; 710119, China; (2) School of Mechanical Engineering, Shaanxi University of technology, Hanzhong; 723001, China
Corresponding author:Zheng, Xiang-Ke(zhengxiangke@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:121693A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to quickly obtain the effect of different bonding process on the surface-shape of the adhesive bonded mirror, the simulation and experimental study of the linear expansion micro-stress assembly process were carried out.The mathematical expression of the solidification micro-stress of the adhesive in plane mirror assembly is derived based on the volume shrinkage rate. The structural stiffness of the mirror and the frame is also taken into the mathematical expression of the micro-stress.A finite element model named "Mirror-Adhesive -Frame" was developed using ANSYS Parametric Design Language (APDL) and User Interface Design Language (UIDL) to calculate the PV and RMS values of the surface-shape of the mirror after bonding.The ZYGO interferometer is used to measure the PV and RMS values of the surface-shape index before and after the bonding of the mirror with a specification of ?100mm-15mm. By comparing the experimental results and the simulation results, the correction value of the equivalent linear expansion parameter of the adhesive layer is obtained. Then, the corrected equivalent linear expansion coefficient of the adhesive layer is brought into the simulation model to predict the PV and RMS values. The results show that the prediction results of the developed simulation model are in good agreement with the measurement results. Moreover, it is found that when the circumference and back of the mirror are both bonded, the PV and RMS values of the surface-shape reach the maximum, and the PV and RMS values are 0.187? and 0.044?, respectively.<br/></div> © 2022 SPIE
Number of references:11
Main heading:Adhesives
Controlled terms:Finite element method - User interfaces - Assembly - Mirrors
Uncontrolled terms:Adhesive-bonded - Assembly process - Equivalent-linear - Finite element modelling (FEM) - Linear expansions - Mathematical expressions - Micro-stress - Plane mirrors - RMS values - Surface shape
Classification code:722.2 Computer Peripheral Equipment - 741.3 Optical Devices and Systems - 921.6 Numerical Methods
Numerical data indexing:Size 1.00E-01m to 1.50E-02m
DOI:10.1117/12.2623637
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 152>
Accession number:20224513074585
Title:An Optical Path Automatic Alignment Method Based on Dual-target Recognition and Improved Alignment Mathematical Model
Title of translation:基于双目标识别和准直数学模型改进的光路自动准直方法
Authors:Guo, Jiafu (1, 2); Wang, Zhengzhou (1); Duan, Yaxuan (1); Wang, Li (1); Xie, Zhengmao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Science, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:Wang, Zhengzhou(azhou_china@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1114006
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The high-power laser device needs to complete optical path self-alignment， analog optical alignment and optical docking alignment before physical experiment starting. With the deepening of physical experiments， the optical docking alignment process of high-power laser device encounters some new problems. First of all， the number of optical targets has changed. In the previous optical docking alignment process， alignment task was performed with the analog laser source turned off. There was only one main laser target in the docking alignment image. Now， in order to reduce the influence of the drift alignment accuracy of the main laser target， the analog laser source is no longer turned off in the alignment process， which means an optical path alignment image contains both an analog laser target and a main laser target. Moreover， optical docking alignment mathematical model has changed， too. In the original high-power laser device， the automatic alignment of 8-path beams adopted the same unit alignment model. The original mathematical model has only one optical target in alignment image instead of multiple optical targets. And the original mathematical model is only for a single-path beam， and the parameter information of multi-path beams is not reflected in the mathematical model. Finally， the docking alignment process of high-power laser was executed in serial in the past， which greatly affected the alignment efficiency. In order to solve the above problems， this paper makes improvements from the following three aspects. For the first problem， according to the characteristics of different optical targets in optical docking alignment images， a dual-optical target recognition algorithm based on circle fitting algorithm is proposed. This algorithm uses the edge pixels of optical objects to perform circle fitting， then calculates their circle fitting ratio. Different optical targets can be recognized by comparing their circle fitting ratio. However， in some special situations， the difference between the circle fitting ratio of the analog laser target and the main laser target is very slight. It is not effective to recognize the dual targets only by the circle fitting ratio. Therefore， a new parameter， based on the circle fitting coefficient， BLOB region number is added as a supplement to the circle fitting coefficient to jointly determine the final target recognition result. For the second problem， this paper build a new automatic alignment mathematical model based on multi-optical path and dual-target. The new mathematical model embodies the characteristics of optical targets well， and improves convergence condition， which could judge whether the distance between the main laser center and target position is less than the given error threshold. For the last problem， this paper improves the efficiency of optical docking alignment by parallel alignment multiple optical paths. The experimental results show that the dual-optical target recognition algorithm proposed in this paper based on circle fitting can recognize analog laser target and main laser target well. Besides， the recognition error accuracy is less than 3 pixels， and the processing time is less than 1 second， which meets the accuracy and efficiency requirements of optical docking alignment of the high-power laser device. Simultaneously， the automatic alignment mathematical model constructed in this paper based on multiple optical paths and dual targets has great significance for the success of optical docking alignment.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:17
Main heading:High power lasers
Controlled terms:Alignment - Image processing
Uncontrolled terms:Circle fitting - Dual-optical target recognition - Improved alignment mathematical model - Laser targets - Multi-path beam parallel alignment - Multipath - Optical docking alignment - Optical target recognition - Optical- - Parallel alignments
Classification code:601.1 Mechanical Devices - 723.2 Data Processing and Image Processing - 744.1 Lasers, General
Numerical data indexing:Time 1.00E00s
DOI:10.3788/gzxb20225111.1114006
Funding details: Number: 2020GY‒005, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: 61705254, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No.61705254）， Key Research and Development Program of Shaanxi Province of China （No.2020GY‒005）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 153>
Accession number:20223612693744
Title:High-throughput Full-color Fourier Ptychographic Microscopy for the Next Generation of Digital Pathologic Imager and Analyser（Invited）
Title of translation:面 向 下 一 代 数 字 病 理 成 像 分 析 仪 的 高 通 量全 彩 色 傅 里 叶 叠 层 显 微 成 像 术（特 邀）
Authors:Pan, An (1, 2); Gao, Yuting (1, 2); Wang, Aiye (1, 2); Gao, Huiqin (1, 2); Ma, Caiwen (1, 2); Yao, Baoli (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100094, China
Corresponding author:Pan, An(panan@opt.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751408
Language:English
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier Ptychographic Microscopy （FPM） is a promising computational imaging technique，which tackles the intrinsic trade-off between high resolution and large wide Field Of View（FOV）with a combination of Synthetic Aperture Radar （SAR） and optical phase retrieval. In brief，an LED array beneath the microscope provides illumination of the object from different incident angles. The range of light that can be collected is determined by the Numerical Aperture（NA）of the objective，while parts of the scattering light with a high-angle illumination can also be collected because of light-matter interaction. The low resolution intensity images recorded at each illumination angle are then synthesized in the Fourier domain，thus the object’s high-frequency information can be modulated into the passband of the objective. After an iterative phase reconstruction process，the synthesized information generates a high resolution object image including both intensity and phase properties. Additionally，it preserves the original large FOV as a low-NA objective is used to stitch low resolution images together. Given its flexible setup without mechanical scanning and interferometric measurement，FPM has developed rapidly，which not only acts as a tool to obtain both HR and large FOV but is also regarded as a paradigm to solve a series of trade-off problems，say，the trade-off between angular resolution and spatial resolution in light field imaging. And it may inspire to solve the trade-off between spectral resolution and spatial resolution in imaging spectrometer in the future. In this paper，we comprehensively summarized the development trend of FPM technique in 9 aspects，including high-precision imaging，high-throughput imaging，high-speed or single shot imaging，3D or tomography imaging， mixed state decoupling， spectral dimension （color imaging to hyperspectral imaging），high dynamic range，system extension，and typical applications. Among them，digital pathology is one of the earliest and the most successful applications of FPM. Distinguished from other reviews，we focused on introducing the development process and recent advances in the direction of digital pathology，and divided it into"0-1"，"1-10"，and"10-100"three periods and several stages. Several typical results are also provided. Specifically，the"0-1"refers to the birth of FPM，which breaks the mutual restrictions between FOV and spatial resolution. The"1-10"refers to the exploration period，where the accuracy and stability， limits and bottlenecks， and the efficiency of FPM have been successively discussed and improved. The stage of"10-100"refers to the industrialization period. During this period，researchers focus on market-oriented requirements including acquisition and analysis of color，since full-color imaging is of critical importance for analyzing labeled tissue sections. We point out that FPM has entered the industrialization stage of"10-100"in this application direction. The current task is to build a prototype or product based on FPM. We expect that the product can obtain a spatial resolution of around 200 nm~1 000 nm，a FOV of around 10 mm（2× objective）or 5 mm （4× objective）diameter full-color FPM reconstructed image within 4 s at the DOF of around 0.3~0.5 mm stably and efficiently. We estimate that it can be capable of automation and batch scanning within the next 1~2 years. We analyzed the industry development situations of digital pathology and related market requirements， and discussed the potential of FPM for large-scale socio-economic benefits. We demonstrated that the full-color images with high quality and content and quantitative phase images produced by FPM may play a role of promotion in wide fields，including intraoperative pathology，quantitative Artificial Intelligence （AI） diagnosis， three-dimensional reconstruction， telepathology，teaching and standardized industry criteria. It should also be clarified that as a typical interdisciplinary field，even if the instrument is successfully invented，it only solves issues in the imaging section of the whole process of digital pathology，and there still remain a series of tough tasks to complete. We discussed and classified related scientific problems，technical problems，engineering problems，and industrial problems in detail，whose successful and perfect resolution relies on joint efforts of various parties and constructive introduction of several potential approaches. By combining the FPM solution with the upstream and downstream advanced methods，including the virtual staining，multimodal fusion imaging，label-free observation in situ， non-destructive three-dimensional reconstruction， preliminary screening， and recognition with AI，etc.，we believe that the industry problems will eventually be overcome or alleviated.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:173
Main heading:Hyperspectral imaging
Controlled terms:Computational Imaging - Economic and social effects - Fourier transforms - Image resolution - Iterative methods - Pathology - Synthetic aperture radar
Uncontrolled terms:Computational imaging - Digital pathologies - Fourier - Fourier ptychographic microscopy - Full color - High-content - High-content imaging - High-Throughput Imaging - Spatial resolution - Whole slide imaging
Classification code:461.6 Medicine and Pharmacology - 716.2 Radar Systems and Equipment - 746 Imaging Techniques - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 971 Social Sciences
Numerical data indexing:Age 1.00E00yr to 2.00E+00yr, Size 0.00E00m, Size 1.00E-02m, Size 2.00E-07m, Size 3.00E-04m to 5.00E-04m, Size 5.00E-03m, Time 4.00E+00s
DOI:10.3788/gzxb20225107.0751408
Funding details: Number: 12104500,12127805, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China（Nos. 12104500，12127805）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 154>
Accession number:20225213303333
Title:Preparation Technology and Application of Vanadium Dioxide Thin Films （Invited）
Title of translation:二氧化钒薄膜的制备技术及应用进展（特邀）
Authors:Shi, Qianqian (1, 2); Wang, Jiang (1); Cheng, Guanghua (1)
Author affiliation:(1) School of Artificial Intelligence， Optics and Electronics （iOPEN）, Northwestern Polytechnical University, Xi'an; 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Cheng, Guanghua(guanghuacheng@nwpu.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:10
Issue date:October 2022
Publication year:2022
Article number:1016002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Vanadium dioxide （VO<inf>2</inf>） has attracted many attention of researchers since it was discovered in 1959 to have the reversible phase transition from metal to insulator. Before and after the phase transition， its optical， electrical and thermal properties change dramatically. Therefore， vanadium dioxide is widely used in the fields of thermal light control， infrared and optical protection camouflage， ion batteries and chemical sensors. In order to enable domestic researchers to have a more comprehensive and in-depth understanding of this interesting material with broad application prospects， this paper reviews the latest progress of vanadium dioxide film preparation technology in the past five years and its applications in different hot areas. First， we introduce the structure and phase transition mechanism of VO<inf>2</inf>. When the temperature exceeds 68℃， VO<inf>2</inf> will undergo a phase transition from insulator to metal， and its crystal structure will change from monoclinic insulator to rutile metal structure. At the same time， because the crystal structure of vanadium dioxide changes after phase transformation， its corresponding energy band structure also changes. Because the crystal structure and energy band structure of VO<inf>2</inf> change suddenly before and after the phase transition， people devote themselves to exploring the physical mechanism of its phase transition. Up to now， there have been many research on the VO<inf>2</inf> phase transition mechanism， and also various research methods and devices， but there is no accurate and unified statement. In this paper， we focus on three mainstream explanations of phase transition mechanisms： the first is electron-electron correlation mechanism， i.e. electron correlation driven Mott transition； The second is the electron phonon interaction mechanism， i.e. crystal structure driven Peierls transition. The third is that electron correlation and crystal structure jointly drive VO<inf>2</inf> phase transition， and the supporting evidence is summarized. In addition， the phase transition characteristics of vanadium dioxide films are closely related to the preparation technology and process parameters. In the second part of this paper， many new technologies for preparing VO<inf>2</inf> thin films， such as high-energy pulsed magnetron sputtering， atomic layer deposition， ink-jet printing， spray pyrolysis and laser direct writing， are introduced in detail， and the advantages and disadvantages of each technology are briefly described. This part provides ideas for researchers on the preparation of materials at the initial stage of experimental design. In performance evaluation， this parameter thermal hysteresis width ΔH reflects the excellent degree of phase transition characteristics of VO<inf>2</inf> thin films ΔH will attenuate the phase transition behavior， reduce the working efficiency of the uncooled detector， and also reduce the sensitivity of the near-infrared optical response to temperature， thus reducing ΔH is of great significance for the wide application of VO<inf>2</inf> thin films in optoelectronic devices. The third part of this paper focuses on the regulating of the thermal hysteresis width ΔH. Many factors， such as stress， doping and defects， are analyzed. The stress factor is mainly reflected in the selection of substrate materials when preparing films. Different substrates will produce films with different orientations， and different orientations will show different properties. Both doping and oxygen defects change the phase transition properties of the materials by distorting the lattice of the materials in the films. The performance of materials determines the width of their application prospects. VO<inf>2</inf> suddenly changes optical， electrical and other properties before and after phase transition， so it is widely used in optoelectronic devices. In recent years， the combination of VO<inf>2</inf> thin films and two-dimensional super surface structures is also a hot direction of application. In this paper， we mainly introduce the application of VO2 thin films in the fields of modified smart windows， terahertz modulators， ultrafast optical switches， electrode materials and various sensors. This part can provide inspiration for researchers to explore new applications of VO<inf>2</inf> materials. Finally， the problems and prospects faced by the development of VO<inf>2</inf> thin films are predicted and evaluated. 1） How to prepare high-purity VO<inf>2</inf> thin films. 2） How to reduce the phase transition temperature without reducing the phase transition performance. The solution of these two problems can contribute to the perfect application of VO<inf>2</inf> materials in military， laser， and other integrated equipment systems. We sincerely hope that this paper will contribute to the development of new active materials and devices in the field of optoelectronics.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:100
Main heading:Metal insulator transition
Controlled terms:Carrier concentration - Crystal structure - Electron-phonon interactions - Electrons - Film preparation - Metal insulator boundaries - Oxide minerals - Semiconductor insulator boundaries - Spray pyrolysis - Thin films - Titanium dioxide - Vanadium dioxide
Uncontrolled terms:Application prospect - Crystals structures - Energy band structure - Metal-insulators transitions - Optical- - Phase transition mechanisms - Preparation technique - Preparation technology - Vanadium dioxide film - VO 2 thin films
Classification code:482.2 Minerals - 701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 933 Solid State Physics - 933.1.1 Crystal Lattice
DOI:10.3788/gzxb20225110.1016002
Funding details: Number: 61875226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022JQ‒013, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No.61875226）， the Nature Science Foundation of Shaanxi Province， China （No. 2022JQ‒013）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 155>
Accession number:20214611158180
Title:Analogous Optical Activity in Free Space Using a Single Pancharatnam–Berry Phase Element
Authors:Liu, Sheng (1); Qi, Shuxia (1); Li, Peng (1); Wei, Bingyan (1); Chen, Peng (2); Hu, Wei (2); Zhang, Yi (1); Gan, Xuetao (1); Zhang, Peng (3); Lu, Yanqing (2); Chen, Zhigang (4, 5); Zhao, Jianlin (1)
Author affiliation:(1) Key Laboratory of Light-field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, Collaborative Innovation Center of Advanced Microstructures, and College of Engineering and Applied Sciences, Nanjing University, Nanjing; 210093, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin; 300457, China; (5) Department of Physics and Astronomy, San Francisco State University, San Francisco; CA; 94132, United States
Corresponding authors:Liu, Sheng(shengliu@nwpu.edu.cn); Zhao, Jianlin(jlzhao@nwpu.edu.cn); Chen, Zhigang(zgchen@nankai.edu.cn)
Source title:Laser and Photonics Reviews
Abbreviated source title:Laser Photon. Rev.
Volume:16
Issue:1
Issue date:January 2022
Publication year:2022
Article number:2100291
Language:English
ISSN:18638880
E-ISSN:18638899
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">It is commonly believed that optical activity (OA) is manifested mainly in chiral media, but rare in non-chiral structures. Here, an analog of OA in free space is experimentally demonstrated by using a single liquid-crystal Pancharatnam–Berry phase element (PBPE), for which the mechanism is highly consistent with that of the traditional OA. The specifically designed PBPE supports the direction-dependent polarization rotation of a Bessel beam with controllable "rotatory power." Such a polarization rotation can be revoked by another PBPE with the same structure. Unlike in a chiral medium, this scheme shows simultaneous realization of equivalent leverotation and dextorotation merely by switching the optical element orientation, promising for applications non-magnetic optical devices such as optical isolators.<br/></div> © 2021 Wiley-VCH GmbH
Number of references:36
Main heading:Liquid crystals
Controlled terms:Polarization - Natural frequencies - Fruits - Optical materials
Uncontrolled terms:Bessel beam - Chiral medium - Chiral structures - Free spaces - Liquid-crystals - Optical activity - Pancharatnam-Berry phase - Phase element - Polarization rotation - Rotatory power
Classification code:741.3 Optical Devices and Systems - 821.4 Agricultural Products
DOI:10.1002/lpor.202100291
Funding details: Number: CX202047, Acronym: -, Sponsor: -;Number: 11574389,11634010,11774289,11804277,12074312,12074313,61675168,91850118, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 3102019JC008, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2019JM‐583, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research was supported by the National Key R&D Program of China (2017YFA0303800), the National Natural Science Foundations of China (NSFC) (11634010, 12074312, 61675168, 12074313, 11774289, 91850118, 11804277, and 11574389), Basic Research Plan of Natural Science in Shaanxi province (2019JM‐583), and Fundamental Research Funds for the Central Universities (3102019JC008), Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX202047).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 156>
Accession number:20221511946653
Title:Research on Intelligent Health Management Technology of Opto-electronic Equipment
Authors:Zhang, Chuming (1, 2); Wei, Guojun (2); Xie, Meilin (3); Liu, Peng (3); Cao, Yu (3); Lian, Xuezheng (3); Huang, Wei (3); Liu, Kai (3)
Author affiliation:(1) Unit 63790 of the PLA, China; (2) Space Engineering University, Beijing; 101499, China; (3) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Source title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Abbreviated source title:IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC
Part number:1 of 1
Issue title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Issue date:2022
Publication year:2022
Pages:1961-1967
Language:English
ISBN-13:9781665431859
Document type:Conference article (CA)
Conference name:6th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Chongqing, China
Conference code:177924
Sponsor:Chengdu Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the development of China's weapon equipments and the continuous progress of information technology, the demand for the mobility, reliability, unmanned and flexible networking ability of opto-electronic measurement equipment is increasing. Breakthrough in the intelligent health management technology of opto-electronic equipment has become a major requirement for unmanned intelligent shooting range construction. Focusing on the opto-electronic measuring equipment in the shooting range, this paper detailed analyzes the development status of health management technology at home and abroad. Then it introduces the health diagnosis and decision-making strategy of opto-electronic equipment. According to a certain type of opto-electronic equipment, three health state early warning models are established and compared: health state early warning model based on statistical analysis, health state early warning model based on machine learning and health state early warning model based on neural network, subsystem simulation is given. Finally, the development direction of intelligent health management technology of opto-electronic equipment is predicted, the next work to be carried out is pointed out.<br/></div> © 2022 IEEE.
Number of references:6
Main heading:Decision making
Controlled terms:Health - Oscillators (electronic) - Construction equipment
Uncontrolled terms:Early warning - Early-warning models - Health management - Health management technologies - Health state - Health state early warning - Intelligent - Model-based OPC - Opto-electronics - Shooting ranges
Classification code:405.1 Construction Equipment - 461.6 Medicine and Pharmacology - 713.2 Oscillators - 912.2 Management
DOI:10.1109/ITOEC53115.2022.9734543
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 157>
Accession number:20220711631676
Title:A Novel NMF Guided for Hyperspectral Unmixing From Incomplete and Noisy Data
Authors:Dong, Le (1); Lu, Xiaoqiang (2); Liu, Ganchao (3); Yuan, Yuan (4)
Author affiliation:(1) Northwestern Polytechnical University, School of Artificial Intelligence, Optics and Electronics (iOPEN), Xi'an; 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Northwestern Polytechnical University, School of Artificial Intelligence, Optics and Electronics (iOPEN), Xi'an; 710072, China; (4) Northwestern Polytechnical University, School of Artificial Intelligence, Optics and Electronics (iOPEN), Xi'an; 710072, China
Corresponding author:Yuan, Yuan(y.yuan1.ieee@qq.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The nonnegative matrix factorization (NMF)-combined spatial–spectral information has been widely applied in the unmixing of hyperspectral images (HSIs). However, how to select the appropriate similarity pixels and explore the spatial information and how to adapt the unmixing algorithm to complex data are both great challenges. In this article, we propose a novel unmixing method named spatial–spectral neighborhood preserving NMF (SSNPNMF) for incomplete and noisy HSI data. First, a spatial–spectral kernel regularizer is introduced to preprocess the HSI, which can reduce noise and complete missing elements. Second, a distance metric SSD based on spatial–spectral information is designed to select similar pixels in the image. Subsequently, the spatial–spectral relationship of the selected first k similar pixels is used to reconstruct the image and obtain the reconstruction matrix. Finally, the reconstruction matrix is used to constrain the abundances and improve the unmixing performance. Experimental results on synthetic data and Cuprite data indicate that SSNPNMF has a more effective unmixing performance compared with the state-of-the-art methods.<br/></div> © 2021 IEEE.
Number of references:53
Main heading:Image reconstruction
Controlled terms:Hyperspectral imaging - Spectroscopy - Matrix algebra - Pixels - Gaussian noise (electronic) - Matrix factorization
Uncontrolled terms:Images reconstruction - Interference - Neighbourhood - Noise measurements - Nonnegative matrix factorization - Performance - Reconstruction matrix - Spectral information - Stability analyze - Unmixing
Classification code:746 Imaging Techniques - 921 Mathematics - 921.1 Algebra
DOI:10.1109/TGRS.2021.3101504
Funding details: Number: 61632018,62001390, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020YFB2103902, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61825603, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Key Research and Development Project under Grant 2020YFB2103902, in part by the National Science Fund for Distinguished Young Scholars under Grant 61825603, in part by the Key Program of National Natural Science Foundation of China under Grant 61632018, and in part by the National Natural Science Foundation of China under Grant 62001390.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 158>
Accession number:20221611967721
Title:Research on selection of high intensity laser beam expanding system
Authors:Gao, Na (1, 2); Zhang, XiangHui (1); Liu, Jie (1); Shen, ZeYi (1); Xin, Wei (1); Wang, Hu (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhang, XiangHui(zxh@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:121697M
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Since the advent of laser in communication, remote sensing and space observation and so on many fields obtained the rapid development,and the laser emission system is the core composition of various laser applications. This paper briefly introduces the principle of the laser beam expander system. Laser beam expander system through the study of the expanded beam of laser light source transformation, compress the divergent angle, the light source can reduce the energy loss in long distance transmission. This paper compares the optical structure of various common laser beam expanding systems, analyzes the advantages and disadvantages of refraction and reflection, coaxial and off-axis, designs an off-axis three-reaction system, and briefly describes the selection of lens in high-power laser beam expanding system.<br/></div> © 2022 SPIE
Number of references:11
Main heading:Laser beams
Controlled terms:Lenses - Optical remote sensing - Refraction - Energy dissipation - High power lasers - Laser applications
Uncontrolled terms:Beam expanders - Coaxial - Expanding systems - High intensity laser beams - Laser beam expanders - Off-axis - Reflecting system - Refraction system - Remote-sensing - Space observations
Classification code:525.4 Energy Losses (industrial and residential) - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications
DOI:10.1117/12.2625044
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 159>
Accession number:20220911734972
Title:Research on the influence of forward scattering on the resolution of underwater imaging
Authors:DIng, Zhe (1, 2)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:DIng, Zhe(dingzhe0418@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121666H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">When light is transmitted in an underwater environment, the scattering phenomenon caused by water molecules and suspended particles in the water will reduce the resolution of underwater imaging. Therefore, studying the scattering law of light traveling underwater can predict the degradation degree of underwater imaging resolution, thereby providing prior knowledge for underwater image processing. In order to study the effect of forward scattering on the resolution of underwater imaging, this paper use a modulation transfer function (MTF) model of the changing law of underwater imaging resolution, and then used Monte Carlo for simulation verification. The theoretical value and the simulation value are in good agreement, so this paper provides an effective solution for studying the influence of underwater forward scattering on the resolution of underwater imaging.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Optical transfer function
Controlled terms:Optical resolving power - Molecules - Monte Carlo methods - Forward scattering - Underwater imaging
Uncontrolled terms:Degradation degree - Imaging resolutions - Light traveling - Prior-knowledge - Resolution - Scattering law - Scattering phenomenon - Suspended particles - Underwater environments - Water molecule
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 746 Imaging Techniques - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics
DOI:10.1117/12.2617759
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 160>
Accession number:20224613131302
Title:Fusion of Infrared and Visible Sensor Images Based on Anisotropic Diffusion and Fast Guided Filter
Authors:Nan, Jingwen (1, 2); Song, Zongxi (1); Lei, Hao (1); Li, Wei (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Lei, Hao(leihao@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12342
Part number:1 of 1
Issue title:Fourteenth International Conference on Digital Image Processing, ICDIP 2022
Issue date:2022
Publication year:2022
Article number:123422R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510657564
Document type:Conference article (CA)
Conference name:14th International Conference on Digital Image Processing, ICDIP 2022
Conference date:May 20, 2022 - May 23, 2022
Conference location:Wuhan, China
Conference code:183643
Sponsor:Gifu University; University of New Hampshire; University of Poitiers
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared images and visible images can obtain different image information in the same scene, especially in low-light scenes, infrared images can obtain image information that cannot be obtained by visible images. In order to obtain more useful information in the environment such as glimmer, infrared and visible images can be fused. In this paper, an image fusion method based on anisotropic diffusion and fast guided filter is proposed. Firstly, the source images are decomposed into base layers and detail layers by anisotropic dispersion. Secondly, the visible images and the infrared images are passed through the side window Gaussian filter to obtain the saliency map, and then the saliency map is passed through fast guided filter to obtain the fusion weight. Thirdly, the fused base layers and the fused detail layers are reconstructed to obtain the final fusion image. The application of the side window Gaussian filter helps to reduce the artifact information of the fused image. The results of the proposed algorithm are compared with similar algorithms. The fusion results reveal that the proposed method are outstanding in subjective evaluation and objective evaluation, and are better than other algorithms in standard deviation(STD) and entropy(EN), and other quality metrics are close to the optimal comparison algorithm.<br/></div> © 2022 SPIE.
Number of references:20
Main heading:Image fusion
Controlled terms:Diffusion - Gaussian distribution - Infrared imaging - Optical anisotropy - Quality control
Uncontrolled terms:Anisotropic Diffusion - Base layers - Fast guided filter - Gaussian filters - Guided filters - Image information - Infrared and visible image - Saliency map - Side window gaussian filter - Visible image
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 746 Imaging Techniques - 913.3 Quality Assurance and Control - 922.1 Probability Theory - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2644537
Funding details: Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by the Project 61906186 supported by NSFC.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 161>
Accession number:20224413027534
Title:Research on Ultrasonic Response Characteristics of Structures Excited by Laser Transient Grating
Title of translation:激光瞬态光栅激励下结构的超声响应特性研究
Authors:Yao, Dong (1, 4); Gao, Bo (2); Song, Yingzheng (3); Li, Qun (3); Gao, Guilong (4)
Author affiliation:(1) Rocket Force University of Engineering, Xi'an; 710025, China; (2) Shanghai Academy of Spaceflight Technology, Shanghai; 200233, China; (3) Xi'an Jiaotong University, Xi'an; 710049, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Gao, Guilong(gaoguilong@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:9
Issue date:September 2022
Publication year:2022
Article number:0914001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Ultrasonic Nondestructive Testing （NDT） supports field use and has a strong resolution， which is a key developing method in the field of structural health supervision and testing. In recent years， contact-type technical paths such as patch detection， medium coupling detection， and air coupling detection based on piezoelectric sensors have been formed， which are widely applied to many industries. With the integration of high-quality pulsed laser technology and the research on the mechanism of laser-matter interaction， the detection technology of pulsed laser-excited ultrasound has gradually developed. This technology is expected to solve the problems of surface pollution and fixed detection area caused by traditional piezoelectric-excited adhesive sensors and coating coupling agents. The ultrasonic wave excited by pulsed laser includes longitudinal wave， transverse wave and surface wave， and its propagation velocity is related to the density and elastic constant of the material. In the past， the spot source mode and line source mode of a pulsed laser beam， as well as the line source array mode modulated by lens array and fiber bundle with fixed physical structure， limited the flexibility of spatial expansion of pulsed laser， and also restricted the development of structural response characteristics and signal-structure correlation analysis under the new excitation mode. The disadvantages of pulsed laser excitation are： the monochromatic coherence of laser restricts the modulation ability of beam spot， which leads to the limitation of ultrasonic time-frequency mode， meanwhile， the structural damage threshold limits the energy of pulsed laser， which leads to the shortage of ultrasonic signal intensity. In this paper， the spatial expansion of pulsed laser is combined with laser ultrasonic nondestructive testing technology. Then， the structural response of laser transient grating acting on aluminum alloy plate is studied from two aspects： numerical analysis and experimental research by adopting the idea of numerical analysis to reveal the law and experimental research to verify the method. By deploying observation points at different distances and directions from the center of the grid excitation， the peak gain and the decrease of energy density of the grid excitation signal are obtained for the first time， and the direction angle of near-field enhancement is revealed. The structure size of the simulation model is 50 mm×50 mm×5 mm， the number of grids is 189 062， and the number of computing nodes is 32 028. Mesh encryption is carried out near the center of the upper surface of the aluminum plate， and transition treatment is carried out in a certain range to meet the comprehensive requirements of convergence of the loading area and controllable overall calculation scale. In the field of laser processing and laser processing， aiming at the laser absorption process of rough surface， the reflection-absorption comprehensive model and lumped test method are developed to measure the laser absorption rate. In terms of numerical analysis， the influence of surface roughness on absorptivity under the framework of reflection and absorption model was studied. The excitation process of laser transient grating with a 1mm diameter， 1ns pulse width and 6 mJ single pulse input was simulated， and the comparative analysis of point laser source and line laser source with the same energy was carried out. The numerical results show that the peak value of ultrasonic signal under transient grating excitation was 2~5 times that of point source excitation when the observation distance less than or equal to 4 mm， and the surface energy density of the structure was about 1% of that excited by point source and 12.7% of that excited by line source. The principle of the experiment is that the laser beam spot generated by the pulse laser is split and interfered with by the transient grating module， then， a "bright and dark" laser transient grating is formed. The transient laser grating acts on the surface of the aluminum plate， and the ultrasonic wave is excited in the aluminum plate by thermoelastic effect， which causes the longitudinal displacement of the structural surface. The laser interferometer is used to collect the displacement of the structure surface which is 2 mm and 10 mm away from the center of grating action， and the collected signal is displayed by oscilloscope. The device includes pulse laser， transient grating module， laser interferometer， oscilloscope and aluminum alloy plate. In terms of experimental research， the transient grating module was developed， and the laser transient grating ultrasonic experiments were performed on aluminum plate. The experimental results show that the amplitude of ultrasonic was about 1 nm under 60 kHz high pass filtering， the maximum relative deviation of the surface displacement peak was 8.91%， and the deviation of surface acoustic wave velocity was 6.62%， corresponding to the signal delay at 10 mm from the center of the grating. Synthesize the above analysis， the dispersion of laser beam spot excited by laser transient grating reduces the energy density per unit area of the structure surface， and forms ultrasonic enhancement along the grating direction， which lays a good foundation for improving the signal-to-noise ratio and ensuring the safety of the structure.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:18
Main heading:Surface waves
Controlled terms:Adhesives - Aluminum alloys - Damage detection - Laser beams - Laser excitation - Modulation - Nondestructive examination - Numerical methods - Pulsed lasers - Structural health monitoring - Ultrasonic testing - Ultrasonic waves
Uncontrolled terms:Aluminium plates - Beam spot - Energy density - Experimental research - Grating spatial modulation - Line sources - Signal intensities - Spatial modulations - Transient grating - Ultrasonic non-destructive testing
Classification code:422 Strength of Building Materials; Test Equipment and Methods - 541.2 Aluminum Alloys - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 753.1 Ultrasonic Waves - 753.3 Ultrasonic Applications - 801.4 Physical Chemistry - 921.6 Numerical Methods
Numerical data indexing:Energy 6.00E-03J, Frequency 6.00E+04Hz, Percentage 1.00E00%, Percentage 1.27E+01%, Percentage 6.62E+00%, Percentage 8.91E+00%, Size 1.00E-02m, Size 1.00E-03m, Size 1.00E-09m, Size 2.00E-03m, Size 4.00E-03m, Size 5.00E-02m, Size 5.00E-03m, Time 1.00E-09s
DOI:10.3788/gzxb20225109.0914001
Funding details: Number: 62005311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No. 62005311）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 162>
Accession number:20220086245
Title:Hilbert Transformation Deep Learning Network for Single-Shot Moiré Profilometry
Authors:Ma, Pu (1); Du, Hubing (1); Ma, Yueyang (1); Zhang, Gaopeng (2); Wang, Feng (2); Zhao, Zixin (3); Feng, Leijie (1)
Author affiliation:(1) School of Mechatronic Engineering, Xi’an Technological University, Shaanxi, Xi'An; 710032, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'An; 710119, China; (3) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Shaanxi, Xi'An; 710049, China
Corresponding author:Du, Hubing(xh.dhub@stu.xjtu.edu.cn)
Source title:SSRN
Issue date:April 21, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">Phase demodulation from a single moiré fringe pattern is an ill-posed inverse problem, which limits the applications of moiré profilometry in dynamic 3D measurement. In this paper, a deep learning-based high-precision technique is used to tackle this problem arose from highly under sampled inputs. Our novel approach, to the best of our knowledge, termed 2D Hilbert transformation network, uses two Res U-Net networks paired with a dichotomous network to generate the desiredπ∕2 phase-shifting fringe pattern referred to the input. This process can be viewed as 2D Hilbert transformation of a fringe pattern. With this network, the wrapped phase can be extracted easily if the sampled fringes pattern is filtered and normalized in advance. Trained using simulated data, experimental results show that the proposed Hilbert transformation network provides a simple but robust solution for phase extraction from a single fringe pattern with phase error less than 0.02rad and, therefore, make it allow for paving a new way to reliable and practical learning-based single-shot Moiré profilometry.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Interferometry
Controlled terms:Deep learning - Demodulation - Inverse problems - Optical variables measurement - Phase modulation - Profilometry
Uncontrolled terms:2d hilbert transform - Deep learning - Fringe pattern - Hilbert transform - Hilbert transformations - ILL-posed inverse problem - Learning network - Moire profilometry - Phase demodulation - Single-shot
Classification code:461.4 Ergonomics and Human Factors Engineering - 941.4 Optical Variables Measurements
Numerical data indexing:Absorbed dose 2.00E-04Gy
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4089088
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 163>
Accession number:20230713597352
Title:Modeling and Analysis of Vertical Angle Fine-tuning Mechanism Based on Bridge-type Mechanism (Open Access)
Authors:Jiang, Bo (1); Zhang, Zijie (1, 2); Zhou, Shun (2); Chu, Yuanbo (2); Guo, Yifan (2)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Laboratory for Thin Film Techniques and Optical Test, School of Optoelectronics Engineering, Xi'An Technological University, Shaanxi, Xi'an; 710021, China
Corresponding author:Jiang, Bo(ilysay@opt.ac.cn)
Source title:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2437
Part number:1 of 1
Issue:1
Issue date:2022
Publication year:2022
Article number:012083
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:2022 3rd International Conference on Mechanical Engineering and Materials, ICMEM 2022
Conference date:November 18, 2022 - November 19, 2022
Conference location:Nanchang, Virtual, China
Conference code:186521
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">To solve the problem of Angle fine-tuning in the vertical direction of optical devices, we propose an Angle fine-tuning mechanism based on Bridge-type Mechanism. In this paper, we use the method of compliance matrix to establish the statics model of the mechanism and calculate the influence of each parameter on the magnification of the model, then verify it by finite element simulation. Meanwhile, we deduce the calculation formula of compensation value by simulation value and theoretical value to establish Theoretical equations of motion for this mechanism. The results indicate that the simulation results agree well with the theoretical calculation results, after introducing the compensation value, the error caused by the amplification loss of the mechanism can be compensated well to ensure the accuracy of the derived formula.<br/></div> © Published under licence by IOP Publishing Ltd.
Number of references:5
Main heading:Finite element method
Controlled terms:Equations of motion - Error compensation - Matrix algebra
Uncontrolled terms:Angle fine tuning - Bridge-type mechanisms - Compliance matrix method - Compliance matrixes - Fine tuning - Matrix methods - Mechanism-based - Modelling and analysis - Tuning mechanism - Vertical direction
Classification code:921.1 Algebra - 921.2 Calculus - 921.6 Numerical Methods
DOI:10.1088/1742-6596/2437/1/012083
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 164>
Accession number:20220611592668
Title:Single photonic integrated circuit imaging system with a 2D lens array arrangement (Open Access)
Authors:Liu, Gang (1, 2); Wen, Desheng (1, 2); Fan, Wenhui (1, 2); Song, Zongxi (1, 2); Li, Baopeng (1); Jiang, Tuochi (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Province, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Song, Zongxi(songxi@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:4
Issue date:February 14, 2022
Publication year:2022
Pages:4905-4918
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The segmented planar imager is an advanced optical interferometric telescope with a photonic integrated circuit (PIC). It provides a significant reduction in size, weight, and power consumption as compared to traditional optical interferometry. In this article, we propose the combination of a single PIC with a two-dimensional (2D) lens array to achieve single-PIC imaging. Unlike previous designs which require a large number of PIC arrangements in different directions for imaging, a single-PIC imaging system requires only one PIC for 2D frequency domain sampling and imaging. In addition, the single-PIC imaging system can form a larger equivalent aperture through modularization. Since PIC can be mass-produced, the modularization ability of the single-PIC imaging system greatly shortens the production and development cycle of large-aperture telescopes.<br/></div> © 2022 Optica Publishing Group.
Number of references:24
Main heading:Timing circuits
Controlled terms:Photonic devices - Frequency domain analysis - Interferometry - Photonic integration technology - Imaging systems - Telescopes - Modular construction
Uncontrolled terms:% reductions - Array arrangements - Circuit arrangement - Interferometrics - Lens array - Modularizations - Optical interferometry - Optical- - Photonics Integrated Circuits - Two-dimensional
Classification code:405.2 Construction Methods - 713.4 Pulse Circuits - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 921.3 Mathematical Transformations - 941.4 Optical Variables Measurements
DOI:10.1364/OE.447584
Funding details: Number: 1188000111, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:Acknowledgments. This work is supported by the Youth Innovation Promotion Association (No. 1188000111).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 165>
Accession number:20224913201848
Title:Simulation of Integrated System of Photon-Counting Underwater Wireless Optical Ranging and Communication
Authors:Yang, Haodong (1); Yan, Qiurong (1); Wang, Shanglin (1); Xiong, Xiancheng (1); Li, Peng (2); Wang, Wei (2)
Author affiliation:(1) School of Information Engineering, Nanchang University, Nanchang, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an, China
Corresponding author:Yan, Qiurong(yanqiurong@ncu.edu.cn)
Source title:Proceedings - 2022 International Conference on Computing, Communication, Perception and Quantum Technology, CCPQT 2022
Abbreviated source title:Proc. - Int. Conf. Comput., Commun., Percept. Quantum Technol., CCPQT
Part number:1 of 1
Issue title:Proceedings - 2022 International Conference on Computing, Communication, Perception and Quantum Technology, CCPQT 2022
Issue date:2022
Publication year:2022
Pages:100-106
Language:English
ISBN-13:9781665470209
Document type:Conference article (CA)
Conference name:2022 International Conference on Computing, Communication, Perception and Quantum Technology, CCPQT 2022
Conference date:October 28, 2022 - October 30, 2022
Conference location:Xiamen, China
Conference code:184364
Sponsor:Beijing University of Technology; Central South University; Southwest Jiaotong University; University of Electronic Science and Technology of China; Western Norway University of Applied Science
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Although many researchers have achieved wireless optical ranging and communication based on Avalanche Photon Diode (APD) detectors and PIN detectors. However, due to the low sensitivity of APD and PIN detectors, their working distances are limited. In order to achieve long-distance underwater wireless optical communication, a Single-Photon Avalanche Diode (SPAD) with photon-limited sensitivity is used to detect optical signals. In addition, most literatures do not specially design the data frames of ranging and communication, which makes it difficult to perform ranging and communication at the same time. In view of the fact that there is currently no systematic solution for simultaneous communication and high-precision ranging under underwater photon counting, this paper sorts out the relevant technical details, proposes an integrated ranging and communication scheme applied to photon counting, designs a special data frame that integrates ranging and communication, and proposes an extraction and recovery scheme for ranging and communication signals. Simulation shows that this scheme can achieve underwater photon counting wireless optical communication with a communication distance of 160m and an SER of 9.75×10-6, and the ranging accuracy is better than 1.59cm.<br/></div> © 2022 IEEE.
Number of references:10
Main heading:Photons
Controlled terms:Avalanche diodes - Optical communication - Particle beams - Underwater optical wireless communication
Uncontrolled terms:Component - Data frames - High-precision - High-precision ranging - Optical ranging - Photon counting - Special data frame - Underwater wireless optical communication and ranging - Underwater wireless optical communications - Wireless-optical
Classification code:675 Marine Engineering - 714.1 Electron Tubes - 717.1 Optical Communication Systems - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Size 1.59E-02m, Size 1.60E+02m
DOI:10.1109/CCPQT56151.2022.00024
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 166>
Accession number:20221211816407
Title:Double layer local contrast measure and multi-directional gradient comparison for small infrared target detection
Authors:Ren, Long (1, 2); Pan, Zhibin (2); Ni, Yue (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Faculty of Electronics and Communications, Xi'an Jiaotong University, Xi'an; 710049, China; (3) China Academy of Launch Vechicle Technology, Peking; 100076, China
Corresponding author:Ren, Long(renlong@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:258
Issue date:May 2022
Publication year:2022
Article number:168891
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared small target detection is one of the key technologies in the search and track (IRST) based on infrared imaging equipment. At present, the performance of small target detection based on single frame infrared image is directly related to the accuracy of subsequent target tracking, so it has been studied a lot. However, the existing small target detection algorithms have certain limitations in detection accuracy and real-time performance, especially when the contrast between the target and the background area is not high or the background is complex, especially in the complex sea or sky background, due to the influence of a large amount of noise and clutter in the background, the existing infrared small target detection algorithms have a high false alarm rate. To solve the above problems, this paper proposes a small target detection algorithm based on weighted double layer local contrast and multi-directional gradient map, which realizes the accurate detection of small targets from two aspects of targets’ local contrast and gradient. Firstly, we design an improved two layer local contrast measurement architecture, and use the weighted mean method to better represent the gray value of the local window; Secondly, a local contrast comparison method based on target and background is proposed to enhance the intensity of small targets and suppress some background clutter; Then, the multi-directional gradient map is used to further suppress the noise so as to improve the contrast between the target and the background. At the same time, singular value decomposition (SVD) method is used to extract the main features including small targets, which can effectively suppress the small texture interference around the targets in the background without losing the target intensity; Finally, an adaptive threshold method is used to separate small targets from their background. Experimental results show that compared with the existing algorithms, the proposed detection algorithm can effectively reduce the false alarm rate in different complex scenes, and the computational efficiency is improved compared with some multi-scale small target detection methods. At the same time, the signal to clutter ratio (SCR), background suppression factor (BSF) and receiver operating characteristic (ROC) curve are also better than these existing state of the art algorithms, which can display good robustness.<br/></div> © 2022
Number of references:37
Main heading:Computational efficiency
Controlled terms:Errors - Target tracking - Radar clutter - Signal detection - Image resolution - Signal receivers - Clutter (information theory) - Textures - Singular value decomposition
Uncontrolled terms:Double layer local contrast - Double layers - False alarm rate - Infrared small target detection - Infrared small targets - Local contrast - Multi-directional gradient - Small target detection - Small targets - Target detection algorithm
Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 921 Mathematics
DOI:10.1016/j.ijleo.2022.168891
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 167>
Accession number:20230713580664
Title:Residual Stress and Deformation of 1 064 nm High Reflection Films for Laser Systems
Authors:Li, Yang (1); Xu, Jun-Qi (1); Su, Jun-Hong (1); Yuan, Song-Song (1); Liu, Qi (1); Liu, Zheng (2)
Author affiliation:(1) Shaanxi Province Thin Film Technology and Optical Test Open Key Laboratory, Xi'an Technological University, Xi'an; 710021, China; (2) Advanced Optical Manufacturing Technology Joint Laboratory, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Corresponding author:Xu, Jun-Qi
Source title:Surface Technology
Abbreviated source title:Surf. Technol.
Volume:51
Issue:9
Issue date:2022
Publication year:2022
Pages:311-318 and 334
Language:Chinese
E-ISSN:10013660
Document type:Journal article (JA)
Publisher:Chongqing Wujiu Periodicals Press
Abstract:<div data-language="eng" data-ev-field="abstract">The large surface shape change on the substrate after coating is due to the residual stress of the optical films. It presents a challenge for coating optical elements with high precision surface shape. The work aims to study the residual stress mechanism and surface profile shape change of monolayer films and laser high reflection films with different films on substrate. The surface shape change of the substrate is reduced by adding a compressive stress compensation layer on the outermost layer of the multilayer films. It provides a method for preparing micro-deformation laser high reflection mirrors. The residual stress mechanism of monolayer film is analyzed by the theory of thermal stress and residual stress in optical films. The equivalent reference temperature is used to replace the intrinsic stress of optical thin films, and the intrinsic stress of optical thin films is obtained by simulation. The residual stress distribution and surface shape change of laser high reflection films-substrate system is studied by finite element analysis and experiments. Based on the stress of monolayer film, the residual stress distribution and surface profile change of high reflection films-substrate system is simulated and analyzed by equivalent reference temperature, birth and death element and load step technology. Different high reflection films are prepared by thermal evaporation of electron beam. The effects of initial substrate surface profile, films material and films combinations on high reflection films-substrate system are analyzed via testing surface profile changes of it, using Zygo laser interferometer. The simulation results show that the residual stress of high reflection films-substrate system is layered. It changes from tensile stress to compressive stress and then to tensile stress in the direction from the substrate to films. The surface profile of high reflective films-substrate system is concave and the Z-axis displacement is distributed annularly due to residual stress. By analyzing the influence of monolayer film on the substrate surface shape and comparing the residual stress value of each film layer in different high reflective films systems, it is found that the surface profile change of G│(HL)<sup>10</sup>H2L│A is smaller than G│(HL)<sup>10</sup>H│A with TiO<inf>2</inf>/SiO<inf>2</inf>. The surface profile of substrate with high reflective films (fused silica substrate, ϕ30×2 mm) is basically unchanged (ΔPV=0.004λ) because the residual stress of films reduced by adding a compressive stress compensation layer, which is consistent with the simulation results. On the fused silica substrate, the intrinsic stress of TiO<inf>2</inf>, HfO<inf>2</inf>, H4 and SiO<inf>2</inf> plays a leading role in the residual stress. The residual stress of TiO<inf>2</inf>, HfO<inf>2</inf>, H4 is tensile on the fused silica substrate while the SiO<inf>2</inf> is compressive. All the high reflection films systems with different material combinations show compressive. For TiO<inf>2</inf>/SiO<inf>2</inf>, the films-substrate system G│(HL)<sup>10</sup>H2L│A is smaller than G│(HL)<sup>10</sup>H│A in residual stress of optical films and the change of surface shape on substrate. Its residual stress value is –39.70 MPa, which is 22.26 MPa less than that without stress compensation layer. Its surface shape has basically not changed. The addition of 2L (stress compensation layer) balances the residual stress of the multilayer films-substrate system without affecting the spectral characteristics.<br/></div> © 2022, Chongqing Wujiu Periodicals Press. All rights reserved.
Number of references:23
Main heading:Multilayer films
Controlled terms:Coatings - Compressive stress - Film preparation - Film thickness - Fused silica - Interferometers - Laser interferometry - Laser mirrors - Monolayers - Multilayers - Optical multilayers - Residual stresses - Stress concentration - Surface stress - Tensile stress - Titanium dioxide
Uncontrolled terms:Birth-death element - Equivalent reference temperature - Film-substrate systems - High reflection films - Multilayers films - Reference temperature - Stress compensation - Stress compensation layer - Surface profiles - Surface shape
Classification code:741.3 Optical Devices and Systems - 743.2 Holographic Applications - 744.7 Laser Components - 744.9 Laser Applications - 804.2 Inorganic Compounds - 812.3 Glass - 813.2 Coating Materials - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
Numerical data indexing:Inductance 1.00E+01H, Pressure 2.226E+07Pa, Pressure 3.97E+07Pa, Size 2.00E-03m, Size 6.40E-08m, Volume 2.00E-03m3
DOI:10.16490/j.cnki.issn.1001-3660.2022.09.032
Funding details: Number: 201805061ZD12CG45, Acronym: -, Sponsor: -;
Funding text:Received：2021-10-29；Revised：2022-01-05 基金项目：陕西省国际科技合作与交流计划资助项目（2018KWZ-02）；西安市智能探视感知重点实验室项目（201805061ZD12CG45） Fund：Shaanxi International Science and Technology Cooperation and Exchange Program Funding Project (2018KWZ-02); Xi'an Intelligent Visiting Perception Key Laboratory Project (201805061ZD12CG45) 作者简介：李阳（1995—），女，博士研究生，主要研究方向为光学薄膜的设计、制备及检测技术。 Biography：LI Yang (1995-), Female, Doctoral candidate, Research focus: design, preparation and testing technology of optical thin films. 通讯作者：徐均琪（1973—），男，博士，教授，主要研究方向为光学薄膜的设计、制备及检测技术。 Corresponding author：XU Jun-qi (1973-), Male, Doctor, Professor, Research focus: design, preparation and testing technology of optical thin films. 引文格式：李阳, 徐均琪, 苏俊宏, 等. 1064 nm 激光高反膜残余应力及其形变分析[J]. 表面技术, 2022, 51(9): 311-318. LI Yang, XU Jun-qi, SU Jun-hong, et al. Residual Stress and Deformation of 1064 nm High Reflection Films for Laser Systems[J]. Surface Technology, 2022, 51(9): 311-318.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 168>
Accession number:20222412234689
Title:Atmospheric Correction for Polarimetric Images Based on Spectral Segregation (Open Access)
Authors:Xia, Pu (1); Chen, Xiaolai (1); Tang, Zhaohuan (2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) China National Heavy Machinery Research Institute Co., Ltd., Xi'an; 710018, China
Corresponding author:Chen, Xiaolai(lailailai@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICIAI 2022 - 6th International Conference on Innovation in Artificial Intelligence
Issue date:March 4, 2022
Publication year:2022
Pages:90-94
Language:English
ISBN-13:9781450395502
Document type:Conference article (CA)
Conference name:6th International Conference on Innovation in Artificial Intelligence, ICIAI 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Virtual, Online, China
Conference code:179812
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">In hazy weather, light's penetration power is wavelength related, the longer wavelength, the less attenuation. Although traditional polarimetric image-dehazing algorithms have demonstrated their ability in enhancing grayscale images, but their ignorance of the spectral difference will lead to serious color distortion when utilizing these algorithms for color images. To conquer that problem, we propose a new method base on spectral segregation. 15 spectral bands are selected and dehazed with the polarimetric dehazing algorithm separately to obtain the best dehazing effects. The blue, green and red channels of the dehazed image, which are acquired through image fusion of the spectral bands, are adjusted with different coefficients to correct the color distortion. 10 infrared bands are added to the short-wavelength channels to enhance the details of the objects especially the trees. Experiment and data analysis demonstrate the effectiveness of our method in increasing visibility and preserving color information. The amount of color distortion can be reduced by 89.6% compared with the polarimetric image-dehazing algorithm without spectral segregation.<br/></div> © 2022 ACM.
Number of references:17
Main heading:Demulsification
Controlled terms:Color - Image enhancement - Image fusion - Image reconstruction - Polarimeters - Spectrum analysis
Uncontrolled terms:Atmospheric corrections - Color distortions - Color image restoration - Dehazing - Haze removal - Image-based - Images processing - Polarimetric image - Polarimetric imaging - Spectral band
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 802.3 Chemical Operations - 941.3 Optical Instruments
Numerical data indexing:Percentage 8.96E+01%
DOI:10.1145/3529466.3529479
Funding details: Number: 2015DFA10140, Acronym: -, Sponsor: -;Number: 61905275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2017B23, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:This work was supported by the International Cooperation Program of China (2015DFA10140), National Nature Science Foundation of China (61905275), Western Lights Foundation of Chinese Academy of Sciences (XAB2017B23), and the Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 169>
Accession number:20222412222084
Title:Design and fabrication of polarization and phase modulated beam splitter
Title of translation:偏振和位相调控分光膜的设计与制备
Authors:Pan, Yonggang (1); Zhang, Sibao (2); Liu, Zheng (2); Liu, Wencheng (2); Li, Mian (2); Zhang, Chunjuan (2); Luo, Changxin (2)
Author affiliation:(1) Zhongshan Institute of Changchun University of Science and Techbology, Zhongshan; 528437, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:5
Issue date:May 25, 2022
Publication year:2022
Article number:20210512
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Polarization and phase controlled beam splitter is an indispensable optical element in free space quantum communication system. Its performance directly affects the communication quality and determines the communication error rate. Based on the theory of equivalent layer design, the special film structure of ''dielectric+metal+dielectric'' is adopted, and Ag metal material and SiO<inf>2</inf>, Al<inf>2</inf>O<inf>3</inf>, Ta<inf>2</inf>O<inf>5</inf> dielectric material are selected to realize 45° incident angle on quartz substrate, and the average transmittance/reflectance ratio is 8.5: 91.5 in the wavelength range from 1500 nm to 1600 nm. Phase is controlled at 1530, 1540, 1550, 1560 nm. By optimizing the deposition process, the splitter film samples are prepared by electron beam evaporation with ion assisted technology. The test results show that the average transmittance/reflectance ratio is 8.53: 91.47 in the wavelength range of 1500-1600 nm under the condition of 45° incidence. The transmitted phase difference controlled within 5.02° and the reflected phase controlled with 8.05° in the range of 1530, 1540, 1550, 1560 nm, which meets the requirements of spectral energy splitting ratio and phase control of communication system. In addition, the film passed the corresponding environmental test, which meets the reliability requirements.<br/></div> Copyright ©2022 Infrared and Laser Engineering. All rights reserved.
Number of references:13
Main heading:Polarization
Controlled terms:Alumina - Aluminum oxide - Dielectric materials - Environmental testing - Optical beam splitters - Optical communication - Optical instruments - Prisms - Silica - Tantalum oxides - Thin films
Uncontrolled terms:Elimination polarization - Equivalent layer - Free spaces - Modulated beams - Optical thin films - Phase - Phase modulated - Polarization-modulated - Reflectance ratio - Wavelength ranges
Classification code:708.1 Dielectric Materials - 717.1 Optical Communication Systems - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 941.3 Optical Instruments
Numerical data indexing:Size 1.50E-06m to 1.60E-06m, Size 1.56E-06m, Size 2.323338E+00m, Size 2.3241E+00m
DOI:10.3788/IRLA20210512
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 170>
Accession number:20221611980034
Title:10 kW rectangular laser beam generation with incoherent space combiner
Authors:Tian, Xiao (1, 2); Bai, Yang (1); Lei, Guangzhi (3); Yu, Lidong (1); Zhou, Jingfeng (1); Li, Ben (1); Wang, Yi (1)
Author affiliation:(1) National Key Laboratory of Photonics and Photon-Technology, Northwest University, Xi'an; 710127, China; (2) School of Science, Xi'an Aeronautical University, Xi'an; 710077, China; (3) Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Corresponding author:Bai, Yang(by@nwu.edu.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:260
Issue date:June 2022
Publication year:2022
Article number:169011
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we report an incoherent space laser beam combiner for rectangular beam combination with 18 fiber-transmitted semiconductor lasers at 972 nm wavelength. The coupled thermo-mechanical properties of all the optical lenses in the combiner were analyzed to evaluate the long-term reliability of the combiner subjected to beyond 10 kW high-power laser irradiation. An experiment-based numerical model was developed on the basis of the multi-beam laser volumetric heat source, and the performance of lenses irradiated by 10 kW combined laser for 1000 s was studied with finite element method (FEM). The maximum temperature among all lenses was 427.27 K which is much lower than the softening point temperature of fused silica material made of lenses. And the 0.1 aperture number corresponding to the maximum thermal deformation of 4.53 µm is much smaller than the conventional optical lens processing tolerance. The maximal stress of 12.73 MPa is far less than the yield stress of 4.5 GPa for the material. The manufactured laser beam combiner realized a highest output power of 10.641 kW at a power combination efficiency of 98.5%, a combination length of 200 mm and a rectangular focal beam spot of 30 mm × 10 mm. Our method provides a valuable choice for realizing fast and flexible laser surface heat treatment.<br/></div> © 2022 Elsevier GmbH
Number of references:30
Main heading:Finite element method
Controlled terms:High power lasers - Surface treatment - Numerical methods - Fused silica - Semiconductor lasers - Laser beams - Yield stress
Uncontrolled terms:10 kw beam combiner - Beam combiner - Beam spot - Incoherent space laser beam combination - Laser beam combination - Multi-beam laser volumetric heat source - Multibeams - Optical lens - Rectangular uniform beam spot - Space lasers - Thermomechanical properties - Uniform beams - Volumetric heat source
Classification code:744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 744.8 Laser Beam Interactions - 812.3 Glass - 921.6 Numerical Methods - 951 Materials Science
Numerical data indexing:Percentage 9.85E+01%, Power 1.00E+04W, Power 1.0641E+04W, Pressure 1.273E+07Pa, Pressure 4.50E+09Pa, Size 1.00E-02m, Size 2.00E-01m, Size 3.00E-02m, Size 9.72E-07m, Temperature 4.2727E+02K, Time 1.00E+03s
DOI:10.1016/j.ijleo.2022.169011
Funding details: Number: 2017YFB0405102, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by Key Research and Development Projects in Shaanxi Province, China (2020GY-118); Serving Local Special Project of Shaanxi Provincial Department of Education, China (19JC040); National Key Research and Development Program of China (2017YFB0405102).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 171>
Accession number:20220911708465
Title:A UAV Detection and Tracking Algorithm Based on Image Feature Super-Resolution (Open Access)
Authors:Li, Bin (1); Qiu, Shi (2); Jiang, Wei (1); Zhang, Wei (1); Le, Mingnan (1)
Author affiliation:(1) School of Information Science and Technology, Northwest University, Xi'an; 710127, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:Wireless Communications and Mobile Computing
Abbreviated source title:Wireless Commun. Mobile Comput.
Volume:2022
Issue date:2022
Publication year:2022
Article number:6526684
Language:English
ISSN:15308669
E-ISSN:15308677
Document type:Journal article (JA)
Publisher:Hindawi Limited
Abstract:<div data-language="eng" data-ev-field="abstract">UAV is difficult to detect by visual methods at a long distance, so a UAV detection and tracking algorithm is proposed based on image super-resolution. Firstly, a saliency transformation algorithm is built to focus on the suspected area. Then, a generative adversarial network is established on the basis of ROI to realize the super-resolution of weak targets and restore the high-resolution details of target features. Finally, the cooperative attention module is built to recognize and track UAV. Our experiments show that the proposed algorithm has strong robustness.<br/></div> © 2022 Bin Li et al.
Number of references:26
Main heading:Aircraft detection
Controlled terms:Unmanned aerial vehicles (UAV) - Optical resolving power
Uncontrolled terms:Detection and tracking algorithms - High-Resolution Details - Image features - Image super resolutions - Strong robustness - Superresolution - Target feature - Transformation algorithm - Weak targets
Classification code:652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 741.1 Light/Optics
DOI:10.1155/2022/6526684
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 172>
Accession number:20220214035
Title:Theoretical and experimental study on Noise Equivalent Power of X-ray semiconductor ultra-fast response material based on the rad-optic effect
Authors:Yan, Xin (1, 2); Wang, Tao (2); Wang, Gang (2); Yao, Dong (1, 2); Liu, Yiheng (2); Gao, Guilong (2); Xin, Liwei (1, 2); Yin, Fei (2); Tian, Jinshou (2); Chang, Xinlong (1); He, Kai (2)
Author affiliation:(1) Rocket Force University of Engineering, Xi'An; 710025, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'An; 710119, China
Corresponding authors:Chang, Xinlong(xinlongch@vip.sina.com); He, Kai(hekai@opt.ac.cn)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 22, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Semiconductor material based on the rad-optic effect enables ultra-fast detection of X-rays and plays an important role in fusion diagnostics. Obtaining the accurate noise equivalent power (NEP) of the semiconductor ultrafast response material is the key to detecting X-rays. In this paper, the refractive index change mechanism of the semiconductor under X-ray irradiation was analyzed, and the quantitative relationship between the diffraction efficiency and the X-ray photon energy was established through the LT-AlGaAs diffraction imaging experiments. The impulse responses of LT-AlGaAs under 1 KeV-10 KeV X-ray radiation were calculated, revealing the variation of NEP density with radiated photon energy. In the case of bombarding the Al target to generate 1.5 KeV X-rays, the imaging experiments of LT-AlGaAs were performed. The diffraction image of LT-AlGaAs has a linear relationship with the radiation intensity, and the NEP density of LT-AlGaAs reaches 4.80×10<sup>5</sup>W/cm<sup>2</sup>. This study has reference significance for the development of ultra-fast X-ray imaging systems based on the rad-optic effect.<br/></div> © 2022, CC BY.
Number of references:18
Main heading:Photons
Controlled terms:Aluminum gallium arsenide - Diffraction - Gallium compounds - Inertial confinement fusion - Refractive index
Uncontrolled terms:Fast detections - Inertial-confinement fusions - Material-based - Noise equivalent power - Rad-optic effect - Ultra-fast - Ultra-fast detection - Ultra-fast semiconductor - X-ray imaging
Classification code:712.1.2 Compound Semiconducting Materials - 741.1 Light/Optics - 931.3 Atomic and Molecular Physics - 932.2.1 Fission and Fusion Reactions
Numerical data indexing:Power 5.00E+00W
DOI:10.48550/arXiv.2206.10890
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.10890v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 173>
Accession number:20221511962826
Title:Study on the transit time spread characteristic of 20-in. hybrid photomultiplier tube used for high-energy particle detection (Open Access)
Authors:Xin, Liwei (1, 2); Shen, Tao (1); Tian, Jinshou (2); Guo, Lehui (2); Liu, Hulin (2); Chen, Ping (2); Xue, Yanhua (2); Ji, Chao (2); Wang, Xing (2); Gao, Guilong (2); He, Kai (2)
Author affiliation:(1) Rocket Force University of Engineering, Shaanxi, Xi'an; 710025, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China
Corresponding author:Tian, Jinshou(tianjs@opt.ac.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:12
Issue:4
Issue date:April 1, 2022
Publication year:2022
Article number:045103
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">According to the requirements of high-energy particle detection for a large photocathode detection surface, low transit time spread (TTS), and low-cost photomultiplier tube (PMT), a kind of 20-in. hybrid large-area PMT based on the silicon (Si) electron multiplier array was designed and optimized. This study tracked the trajectories of photoelectrons from the photocathode to the silicon electron multiplier array based on the Monte Carlo and finite-integral method. The critical effects on the TTS characteristic of the large-area PMT, including the focusing electrode structure, glass shell structure, different potential differences, and relative distance from the photocathode vertex to the silicon electron multiplier array, were studied in detail. After optimizing the structure of the glass shell, the 20-in. hybrid PMT based on the ultra-small Si electron multiplier array with 40 mm collection diameter can achieve an excellent TTS of about 1.87 ns from the photocathode to the Si electron multiplier array at a collection potential difference of 2000 V.<br/></div> © 2022 Author(s).
Number of references:12
Main heading:Monte Carlo methods
Controlled terms:Photomultipliers - Glass - Photocathodes - Silicon - Electrons
Uncontrolled terms:Critical effects - Electrode structure - Finite integral method - High-energy particles - Hybrid photomultiplier tubes - Low-costs - Particles detection - Potential difference - Shell structure - Transit time spread
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.1 Electron Tubes - 741.3 Optical Devices and Systems - 812.3 Glass - 922.2 Mathematical Statistics
Numerical data indexing:Size 4.00E-02m, Size 5.08E-01m, Time 1.87E-09s, Voltage 2.00E+03V
DOI:10.1063/5.0087552
Funding details: Number: 12105360, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the Youth Program of the National Natural Science Foundation of China (Grant No. 12105360).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 174>
Accession number:20230413429151
Title:An embedded system for short wave infrared image enhancement and 3G-SDI display
Authors:Zhang, Xin (1, 2); Liu, Hui (1, 2); Li, Xiangwei (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and precision machinery of CAS, Xi’an; 710119, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, Xi’an; 710119, China
Corresponding author:Zhang, Xin(zhangxin@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12328
Part number:1 of 1
Issue title:Second International Conference on Optics and Image Processing, ICOIP 2022
Issue date:2022
Publication year:2022
Article number:123281L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510657267
Document type:Conference article (CA)
Conference name:2nd International Conference on Optics and Image Processing, ICOIP 2022
Conference date:May 20, 2022 - May 22, 2022
Conference location:Taian, China
Conference code:185984
Sponsor:Taishan University
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">According to the actual requirements of real-time target tracking processing and display of short wave infrared camera with CameraLink interface, an embedded image processing system based on FPGA is designed. The LVDS and GTX ports of FPGA are used to realize CameraLink interface and 3G-SDI interface, it not only improves the integration of the system, but also saves the cost. The adaptive dual platform histogram equalization algorithm is adopted and implemented, which effectively improves the display effect and subsequent processing quality of short wave infrared image. The paper briefly analyzes the algorithm principle of adaptive dual platform histogram, puts forward the adaptive calculation method of dual platform value, studies the implementation method of the algorithm based on Xilinx's FPGA, and gives the solutions of key modules such as adaptive dual platform histogram equalization, image enlarge and 3G-SDI display in FPGA. The experimental results show that the designed embedded image processing system gives consideration to real-time and effectiveness, and realizes the functions of image amplification and high-definition display; The algorithm can calculate and adjust the upper and lower platform values of the histogram in real time according to the scene within 400 µs, effectively enhance the contrast of the image and suppress the background noise. The system has the advantages of strong algorithm adaptability, simple implementation, high integration and low power consumption. It can also be effectively applied to the image acquisition, processing and display of medium wave and long wave infrared cameras.<br/></div> © 2022 SPIE.
Number of references:5
Main heading:Image enhancement
Controlled terms:Embedded systems - Equalizers - Field programmable gate arrays (FPGA) - Graphic methods - Infrared devices - Infrared radiation - Target tracking
Uncontrolled terms:3g-SDI - Adaptive - Camera-link interfaces - Embedded image processing systems - Embedded-system - Histogram equalizations - Infra-red cameras - Infrared cameras - Short wave infrared - Short wave infrared camera
Classification code:713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 721.2 Logic Elements - 741.1 Light/Optics
Numerical data indexing:Mass 3.00E-03kg
DOI:10.1117/12.2644212
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 175>
Accession number:20221712041719
Title:Thermal imaging drift monitoring of Doppler asymmetric spatial heterodyne spectroscopy for wind measurement based on segmented edge fitting (Open Access)
Title of translation:基于分段边缘拟合的测风多普勒差分干涉仪成像热漂移监测方法 (Open Access)
Authors:Zhang, Ya-Fei (1, 2); Feng, Yu-Tao (1); Fu, Di (1, 2); Chang, Chen-Guang (1, 2); Li, Juan (1); Bai, Qing-Lan (1); Hu, Bing-Liang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Feng, Yu-Tao(fytciom@126.com)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:8
Issue date:April 20, 2022
Publication year:2022
Article number:084201
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Doppler asymmetric spatial heterodyne spectroscopy is recently developed for spaceborne measurement of middle and upper atmospheric wind field, which relies on the accurate inverse of interferogram phase to calculate the Doppler shift of airglow emission lines. The change of temperature leads the optical and mechanical components to thermally deformed, causing the imaging plane to thermally drift relative to the detector, changing the distribution of interferogram phase on pixels, and directly introducing phase errors to affect the wind speed inversion. In order to reduce the influence of imaging thermal drift on phase inversion, the segmented fitting method is used in this paper to detect the sub-pixel edges of notch patterns and monitor imaging thermal drift accordingly. In the thermal stability test of a near-infrared Doppler asymmetric spatial heterodyne interferometer prototype, the thermal imaging drifts and ambient temperature show a high consistency in the trend of high-frequency oscillation, and the correlation coefficient can reach 0.86 after removing the baseline. After phase correct by using the thermal imaging shift, the high-frequency oscillation of interferogram phase shift is also greatly suppressed. In order to further verify the accuracy of the algorithm, the influence of the data signal-to-noise ratio and the data distribution characteristic parameter errors used in the fitting on the edge detection are simulated. The results show that the edge detection accuracy is restricted mainly by the data signal-to-noise ratio and the accuracy of the fringe frequency parameters. When the error of the fringe frequency parameter used for fitting is less than 0.5%, the error of other data distribution characteristic parameters is less than 5%, and the data signal-to-noise ratio is enhanced more than 35 times, the algorithm in this paper can achieve a detection accuracy higher than 0.05 pixels.<br/></div> Copyright © 2022 Acta Physica Sinica. All rights reserved.
Number of references:21
Main heading:Signal to noise ratio
Controlled terms:Edge detection - Parameter estimation - Infrared devices - Errors - Infrared imaging - Pixels - Interferometry - Wind - Inverse problems
Uncontrolled terms:Atmospheric wind field measurement - Atmospheric Winds - Dopple asymmetric spatial heterodyne spectroscopy - Doppler - Imaging shift - Interferograms - Interferometric imaging - Spatial heterodyne spectroscopies - Thermal-imaging - Wind field measurements
Classification code:443.1 Atmospheric Properties - 716.1 Information Theory and Signal Processing - 746 Imaging Techniques - 941.4 Optical Variables Measurements
Numerical data indexing:Percentage 5.00E+00%, Percentage 5.00E-01%
DOI:10.7498/aps.71.20212086
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2016A07, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931,E1294301, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant No. 41005019), the West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016A07), the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2019JQ-931), and the West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (Grant No. E1294301). † Corresponding author. E-mail: fytciom@126.com
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 176>
Accession number:20221812066246
Title:Automatic observation and correction method of lunar hyperspectral image
Authors:Wang, Weidong (1, 2); Wang, Yihao (1, 2); An, Lingping (1, 2); Yu, Can (1, 2); Wang, Shuang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Shuang(wangshuang@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12178
Part number:1 of 1
Issue title:International Conference on Signal Processing and Communication Technology, SPCT 2021
Issue date:2022
Publication year:2022
Article number:121780G
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653337
Document type:Conference article (CA)
Conference name:2021 International Conference on Signal Processing and Communication Technology, SPCT 2021
Conference date:December 24, 2021 - December 26, 2021
Conference location:Tianjin, China
Conference code:178746
Sponsor:AEIC Academic Exchange Information Center
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">To realize the long-period and automated data collection of lunar radiation and eliminate the geometric errors of the lunar hyperspectral image during the observation process, this paper proposes a slit-type spectrometer observation method based on the rotating table of the equatorial mount. This method uses a wide field finder-scope to realize automatic moon tracking and positioning; at the same time, it corrects the drift angle and oversampling of the collected raw data. The results show that the full moon situation is the same as the non-full moon situation. This method can effectively find and track the position of the moon's sphere center, and it also corrects the drift and over-sampling of the moon image, realizes accurate and automated long-term observation of the moon, reduces observation errors, and saves observation costs.<br/></div> © 2022 SPIE.
Number of references:8
Main heading:Error correction
Controlled terms:Electromagnetic wave attenuation - Spectrometers - Moon - Spectroscopy
Uncontrolled terms:Automatic observation of the moon - Correction method - Geometric error correction - Geometric errors - Observation method - Over sampling - Slit spectrometer - Wide-field - Wide-field finder-scope
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 711 Electromagnetic Waves - 741.3 Optical Devices and Systems
DOI:10.1117/12.2631853
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 177>
Accession number:20221912096701
Title:Thermal Analysis and Verification Test of the Entrance Window Assembly for Space Solar Observatory
Title of translation:空间太阳观测入射窗组件热分析与试验验证
Authors:Wang, Chenjie (1, 2); Tao, Wenquan (1); Yang, Wengang (2); Ma, Yixin (2); Qin, Dejin (2); Li, Fu (2)
Author affiliation:(1) Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Aerospace Engineering Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Tao, Wenquan(wqtao@mail.xjtu.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:4
Issue date:April 25, 2022
Publication year:2022
Pages:217-230
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">This paper describes the design of the entrance window assembly for the Full-disk Magnetograph (FMG) which is one of the three main payloads of the Advanced Space_based Sloar Observatory mission (ASO-S). The entrance window plays the role to reduce the effect of external space environment on the After Optical System(AOS), to transmit the visible light, and to prevent the infrared radiation and pollution, hence, it is one of the most important components in the design of space solar observatory payloads, as the entrance window is facing the sun all the time on orbit, both its design and verification test are very challenging task.A heat-rejecting entrance window assembly of FMG is designed to ensure that the imaging quality of the whole system is not affected by the drastic change of space environment and the temperature distributions can meet the thermal requirements, then the mechanical, optical and thermal design processes are briefly described. FMG is sun-oriented on orbit with long-term operation, and its optical system is transmissive. Thus, its mirror temperature will be more sensitive to the given solar radiation parameters than the other space optical payloads, and it is necessary to correct solar radiation parameters to improve the accuracy of simulation. Thermal analysis method with equivalent solar radiation parameters is studied to evaluate the heat-rejecting ability of the HEWA, and three analysis cases are selected based on the heat flux of the HEWA and the operational mode of FMG on orbit, while, Case1 and Case 2 are normal operational modes, and Case 3 is a calibration mode.Only 5 nm wide transmission pass-band around the science wavelength (532 nm) is able to reach the AOS of FMG because of the spectral selectivity of the window glasses. The thermal balance test of the HEWA not only needs to simulate the solar radiation intensity, but also needs to simulate solar collimation and spectral characteristics accurately. The solar simulator can simulate the solar radiation intensity, collimation and spectral characteristics adequately, it has higher heat flux simulation accuracy than other methods. Thus thermal balance test with solar simulator is carried out to verify the design and the analysis of the HEWA. Three test cases which are consistent with the analysis cases are carried out during the thermal balance test, quantitatively speaking the analysis results coincide with the test results, however, some main differences exist between them: 1) Temperatures of the baffle during the test are always lower than that of the analysis; 2) The test temperature of the window glasses in normal operational modes are always higher than that of analysis; 3) The temperature difference of Mirror1 in Case 3 is larger than that of the analysis.Some modifications made on the analysis model make the numerical analysis results being quantitatively consistent with the test results. Then the modified analysis model is used to predict the actual on-orbit temperature distribution of the HEWA. From the numerical results, it is found that only about 0.134 W solar radiation is able to pass through the HEWA and be absorbed by the primary mirror of the AOS, the maximum temperature of the window frame on-orbit is 28.2℃, and that of the window glasses is 26.3℃, while the primary mirror of the AOS is able to maintain at 22±2℃. Thus the designed HEWA of FMG is able to withstand each typical condition on orbit and meet the requirements of the mission. It avoids that the optical performance of the space solar observatory payload will decrease or the optical system will be polluted because of the overhigh temperature of the entrance window assembly and the AOS on orbit, which is able to guide the design of transmission optical system and other optical payloads for solar observation.<br/></div> © 2022, Science Press. All right reserved.
Number of references:19
Main heading:Thermoanalysis
Controlled terms:Infrared radiation - Simulators - Observatories - Heat flux - Optical systems - Solar radiation - Orbits
Uncontrolled terms:Entrance window - Equivalent solar radiation parameter - Full disks - Heat-rejecting entrance window assembly - On orbit - Operational modes - Radiation parameters - Solar simulator - Space solar observatory - Thermal balance test
Classification code:641.2 Heat Transfer - 657.1 Solar Energy and Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry
Numerical data indexing:Power 1.34E-01W, Size 5.00E-09m, Size 5.32E-07m
DOI:10.3788/gzxb20225104.0412001
Funding details: Number: 51721004,51836005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;
Funding text:Foundation item：National Natural Science Foundation of China（No.51836005），Innovative Science Foundation of China（No.51721004），111 Project（No.B16038）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 178>
Accession number:20225113283599
Title:Battery screen print defect detection based on stationary velocity fields neural network matching and optical flow rectification
Authors:Zhao, Zhuo (1); Li, Bing (1); Zhang, Shaojie (1); Liu, Tongkun (1); Cao, Jie (2)
Author affiliation:(1) State Key Laboratory for Manufacturing System Engineering, Xi'An Jiaotong University, No.99 Yanxiang Road, Yanta District, Shaanxi, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Gaoxin, Shaanxi, Xi'an; 710119, China
Corresponding author:Zhao, Zhuo(zhuozhao@xjtu.edu.cn)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:93
Issue:11
Issue date:November 1, 2022
Publication year:2022
Article number:115110
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, an automatic defect detection method is proposed for screen printing in battery manufacturing. It is based on stationary velocity field (SVF) neural network template matching and the Lucas-Kanade (L-K) optical flow algorithm. The new method can recognize and classify different defects, such as lacking, skew, and blur, under the condition of irregular shape distortion. Three critical processing stages are performed during detection: (1) Image preprocessing was performed to acquire the printed region of interest and then image blocking was carried out for template creation. (2) The SVF network for image registration was constructed and the corresponding dataset was built based on oriented fast and rotated brief feature matching. (3) Irregular print distortion was rectified and defects were extracted using L-K optical flow and image subtraction. Software and hardware systems have been developed to support this method in industrial applications. To improve environment adaptation, we proposed a dynamic template updating mechanism to optimize the detection template. From the experiments, it can be concluded that the method has desirable performance in terms of accuracy (97%), time efficiency (485 ms), and resolution (0.039 mm). The proposed method possesses the advantages of image registration, defect extraction, and industrial efficiency compared to conventional methods. Although they suffer from irregular print distortions in batteries, the proposed method still ensures a higher detection accuracy.<br/></div> © 2022 Author(s).
Number of references:28
Main heading:Image segmentation
Controlled terms:Application programs - Defects - Efficiency - Image registration - Optical flows - Template matching
Uncontrolled terms:Automatic defect detections - Battery manufacturing - Defect detection - Defect detection method - Images registration - Lucas-kanade - Matchings - Neural-networks - Optical flow algorithm - Velocity field
Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 913.1 Production Engineering - 951 Materials Science
Numerical data indexing:Percentage 9.70E+01%, Size 3.90E-05m, Time 4.85E-01s
DOI:10.1063/5.0095555
Funding details:
Funding text:This project was supported by the State Key Laboratory of Applied Optics. We express our sincere gratitude to Huizhou Desay Battery Company Limited, China, for providing hardware and funding support. We also express our gratitude to the journal's editor and anonymous reviewers for their help in revising this paper.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 179>
Accession number:20214811226199
Title:Visual inspection system for battery screen print using joint method with multi-level block matching and K nearest neighbor algorithm
Authors:Zhao, Zhuo (1); Li, Bing (1); Liu, Tongkun (1); Zhang, Shaojie (1); Lu, Jiasheng (1); Geng, Leqi (1); Cao, Jie (2)
Author affiliation:(1) State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, No.99 Yanxiang Road, Yanta District, Xi'an; Shaanxi; 710054, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Gaoxin, Shaanxi; Xi'an; 710119, China
Corresponding author:Li, Bing(lb@xjtu.edu.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:250
Issue date:January 2022
Publication year:2022
Article number:168332
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">To overcome the drawbacks of manual quality inspection in battery industry, an online vision system is designed for battery screen print. Defect detection technique is based on the joint method of multi-level block matching and K nearest neighbor (KNN) algorithm. Firstly, execute preprocessing to origin images in segmentation, tilt correction and region cutting; Then create block templates on print area and train the corresponding models for active shape model (ASM) and KNN methods; Finally, coarse and accurate block matchings are applied to extract print defects in subsequent stages. In this period, KNN uses shape features of region components to recheck each target block. In addition, we adopt dynamic model updating mechanism to enhance system adaptability of condition changing. The joint method has two advantages: fault detection caused by print distortion is obviously reduced; accurate defect localization is also assured. Meanwhile, system hardware and software are also developed and calibrated to support detection method. Performance comparison, recognition rate and time efficiency are validated in experiment stage. It can be concluded that the proposed method has superior performances in both simulations and industrial application.<br/></div> © 2021 Elsevier GmbH
Number of references:27
Main heading:Fault detection
Controlled terms:Defects - Computer vision - Learning algorithms - Motion compensation - Nearest neighbor search - Template matching - Image segmentation
Uncontrolled terms:Active Shape Models - Block Matching - Defects inspections - Joint method - K near neighbor - Machine-vision - Multilevels - Nearest-neighbor algorithms - Nearest-neighbour - Visual inspection systems
Classification code:723 Computer Software, Data Handling and Applications - 723.4.2 Machine Learning - 723.5 Computer Applications - 741.2 Vision - 921.5 Optimization Techniques - 951 Materials Science
DOI:10.1016/j.ijleo.2021.168332
Funding details: Number: 51875448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by the National Natural Science Foundation of China (NSFC) [Grant No. 51875448]. We express our sincere gratitude to Huizhou Desay battery Company Limited, China to provide hardware support. We also show our grateful to the journal's editor and anonymous reviewers for their help in revising the paper.This work is supported by the National Natural Science Foundation of China (NSFC) [Grant No. 51875448 ]. We express our sincere gratitude to Huizhou Desay battery Company Limited, China to provide hardware support. We also show our grateful to the journal's editor and anonymous reviewers for their help in revising the paper.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 180>
Accession number:20224513057107
Title:The time varying reliability analysis for space focusing mechanism based on probability model
Authors:Cheng, Penghui (1, 2); Wu, Mengyuan (1); Li, Chuang (1)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing; 100049, China
Corresponding authors:Wu, Mengyuan(wmy@opt.ac.cn); Li, Chuang(lichuang@opt.ac.cn)
Source title:Journal of Mechanical Science and Technology
Abbreviated source title:J. Mech. Sci. Technol.
Volume:36
Issue:11
Issue date:November 2022
Publication year:2022
Pages:5587-5597
Language:English
ISSN:1738494X
E-ISSN:19763824
Document type:Journal article (JA)
Publisher:Korean Society of Mechanical Engineers
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with the ground focusing mechanism, the working environment of space focusing mechanism is more harsh and complicated. Hence the accurate prediction of its reliability is indispensable. However, it is unrealistic to obtain sample parameters of reliability analysis through repeated entity tests, due to the limitation of project cost and timetable, which lead to many existing model cannot be applied directly. We focus on a screw guide type space focusing mechanism, and propose a new time varying reliability probabilistic model that can characterize the reliability of discontinuous motion mechanisms with discrete multi-load. Its primary uncertainties and failure modes are evaluated quantitatively by failure mode effects analysis. The total damage of intermittent operation is treated as accumulative effect caused by each focusing work. And main parameters of the model are obtained by analytical calculation of mechanism wear reliability model. Finally, an integrated theoretical method are constructed and verified in this article, and the time varying reliability of proposed focusing mechanism are also discussed.<br/></div> © 2022, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:29
Main heading:Monte Carlo methods
Controlled terms:Failure (mechanical) - Failure modes - Focusing - Intelligent systems - Reliability analysis - Uncertainty analysis - Wear of materials
Uncontrolled terms:Archard wear model - Failure mode and effects analysis - Focusing mechanisms - Homogeneous composite poisson process - Mechanism-based - Monte Carlo's simulation - Poisson process - Space focusing mechanism - Time varying reliability - Wear model
Classification code:723.4 Artificial Intelligence - 922.1 Probability Theory - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.1007/s12206-022-1022-9
Funding details: Number: 61427811, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The study is supported partially by the National Natural Science Foundation of China (Grant Nos.: 61427811). The support is gratefully acknowledged.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 181>
Accession number:20223912798032
Title:Doppler Asymmetric Spatial Heterodyne Interferometry for Wind Measurement in Middle and Upper Atmosphere （Invited）
Title of translation:中高层大气风场探测多普勒差分干涉技术（特邀）
Authors:Xiao, Yang (1, 2); Feng, Yutao (1); Wen, Zhenqing (1, 2); Fu, Di (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Feng, Yutao
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:8
Issue date:August 2022
Publication year:2022
Article number:0851516
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Atmospheric wind field is an important parameter to understand the dynamics and thermodynamic characteristics of the Earth's atmospheric system， and it is the basic data for weather forecasting， space environment monitoring， and climatology research. Passive optical remote sensing based on Optical interferometer is the main technical means of wind field measurement in the middle and upper atmosphere. In the 1960s， foreign research institutions began to use optical interferometers to detect upper atmospheric wind fields. and carried out the experimental research on interferometer payload technology simultaneously， and successively developed a series of representative scientific instruments and satellite payloads based on the Fabry-Pérot interferometer and the Wide Angle Michelson interferometer. In 2006， the ENGLERT C R research team of the U.S. Naval Research Laboratory proposed a new planetary atmospheric wind detection technology， called Doppler Asymmetric Spatial Heterodyne wind measurement technology， this technology detects the Doppler frequency shift of the atmospheric airglow spectrum by inverting the phase of the interferogram， thereby realizing the detection of the atmospheric wind field. Compared with the Fabry-Perot interferometer and the Wide-Angle Michelson interferometer， the Doppler Asymmetric Spatial Heterodyne interferometer has the following advantages： 1）Two-beam equivalent thickness spatial modulation interference， which relaxes the requirements for the optical index of the element； 2） Interferometer does not need Step-by-step scanning； 3） Wind speed inversion is based on the Fourier transform relationship between interferogram and spectrogram， so it does not need extremely narrow bandwidth （<1 nm） filters to separate single-line spectra； 4）Synchronous calibration can be achieved， the standard spectral line of the calibration light source and the target spectral line of the detection source are simultaneously introduced into the interferometer system to monitor the state change of the interferometer in real time， therefore， the measurement accuracy can be further improved. After nearly two decades， a series of research results have been achieved in basic theory， interferometer design， instrument development technology， data processing and wind speed retrieval of Doppler Asymmetric Spatial Heterodyne Interferometer. In terms of theoretical research progress， domestic and foreign scholars have theoretically analyzed the factors that affect the accuracy of interferometer phase inversion； In order to expand the detection capability of the Doppler Asymmetric Spatial Heterodyne Interferometer， four structural design schemes are proposed by referring to the spectral expansion method of the wide-spectru Spatial Heterodyne Spectroscopy； A series of interferogram preprocessing methods are proposed to eliminate the errors of the original interferogram caused by various defects of optical components， photoelectric sensors and optical systems. Foreign scholars put forward a wind field profile inversion method named "peeling onions". In terms of instrument research progress， since the Doppler Asymmetric Spatial Heterodyne Interferometer wind measurement technology was proposed in 2006， many international research institutions have carried out research on the development process of the core components of the interferometer， and successfully developed a variety of interferometer prototypes covering from visible light to long-wave infrared ，such as Michelson Interferometer for Global High-resolution Thermospheric Imaging （MIGHTI）， Stratospheric Wind Interferometer for Transport studies- Doppler Asymmetric Spatial Heterodyne （SWIFT-DASH）， and Redline DASH Demonstration Instrument （REDDI）. Ground-based instruments and space-based payloads have also been developed to the stage of application and promotion. The main domestic research institute is the Xi'an Institute of Optics and Precision Mechanics of CAS， the institute focuses on the study of the interferometer thermal compensation method， the interferometer glass component design method， the interferometer component gluing and integration process， the interferometer support structure component design and integration process， and proposed a dual-band Doppler Asymmetric Spatial Heterodyne interferometer technology and a high-time-resolution ground-based Doppler Asymmetric Spatial Heterodyne interferometer technology， and developed a single-channel DASH principle prototype with oxygen atom 630 nm and oxygen molecule 867 nm airglow radiation as the target source.This paper reviews the domestic and foreign research progress of Doppler Asymmetric Spatial Heterodyne technology for atmospheric wind field detection， discusses its technical characteristics and application potential， and provides reference for the future development of atmospheric wind field passive optical remote sensing detection technology and mission planning in the field of atmospheric wind field detection in our country.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:60
Main heading:Optical remote sensing
Controlled terms:Atmospheric chemistry - Atmospheric pressure - Atmospheric structure - Atmospheric thermodynamics - Calibration - Data handling - Fabry-Perot interferometers - Interferometry - Light sources - Michelson interferometers - Optical radar - Research laboratories - Space optics - Weather forecasting
Uncontrolled terms:Atmospheric wind field measurement - Atmospheric Winds - Dopple asymmetric spatial heterodyne - Doppler - Fine structure spectrum - Fine structures - Optical interferometer - Spatial heterodyne - Structure spectra - Wind field measurements
Classification code:443 Meteorology - 443.1 Atmospheric Properties - 641.1 Thermodynamics - 656.1 Space Flight - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801.1 Chemistry, General - 901.3 Engineering Research - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
Numerical data indexing:Size 1.00E-09m, Size 6.30E-07m, Size 8.67E-07m
DOI:10.3788/gzxb20225108.0851516
Funding details: Number: YJKYYQ20210021, Acronym: -, Sponsor: -;Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E1294301, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 41005019）， West Light Foundation of the Chinese Academy of Sciences （No. XAB 2016A07）， Natural Science Basic Research Program of Shaanxi Province（No. 2019JQ-931）， West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences （No. E1294301）， Scientific Instrument Developing Project of the Chinese Academy of Sciences （No. YJKYYQ20210021）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 182>
Accession number:20221211822517
Title:Design and realization of catadioptric long wave infrared multiscale optical system
Authors:Yang, Shen (1, 2); Hu, Wang (1, 2); Yaoke, Xue (1, 2); Yang, Song (1, 2, 3); Yongjie, Xie (1, 2); Zhe, Bai (1, 2); Yue, Pan (1, 2); Meiying, Liu (1, 2); Wenhui, Fan (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Engineering, Peking University, Beijing; 100871, China
Corresponding author:Hu, Wang(wanghu@opt.ac.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:123
Issue date:June 2022
Publication year:2022
Article number:104111
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">To realize the global super large field of view (FOV) and medium resolution imaging in satellite ocean remote sensing, we propose a catadioptric multiscale optical system based on the concentric double spherical mirrors with non optical axis. In this paper, according to the non optical axis characteristics of the multiscale optical system objective, the concentric double spherical mirrors with non optical axis characteristics is proposed as the objective to construct the catadioptric multiscale optical system, which can be used in the long wave infrared band (LWIR). Taking the system parameters of MODIS-N as example, the catadioptric multiscale system for LWIR based on concentric double spherical mirror is designed. The system works in the band of 7.5–12.5 μm, the resolution of the sub star point is 325 m, and the imaging FOV is 110°×1.4° (6-channel splicing FOV). The aberration analysis shows that the imaging quality of the system is good. According to the imaging experiment of the single channel prototype, the multiscale design idea based on concentric double spherical mirror is reasonable.<br/></div> © 2022 Elsevier B.V.
Number of references:17
Main heading:Optical systems
Controlled terms:Infrared radiation - Infrared devices - Mirrors - Optical remote sensing - Spheres
Uncontrolled terms:Catadioptrics - Field of views - Imaging experiment of prototype - Imaging experiments - Long wave infrared bands - Multiscale optical system - Optical axis - Remote-sensing - Spherical mirror - The catadioptric system
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 3.25E+02m, Size 7.50E-06m to 1.25E-05m
DOI:10.1016/j.infrared.2022.104111
Funding details: Number: -, Acronym: DARPA, Sponsor: Defense Advanced Research Projects Agency;
Funding text:With the support of AWARE (Advanced Wide-field-of-view Architecture for image Reconstruction and Exploitation) project funded by DARPA, David J. Brady of Duke University has carried out in-depth research on the multiscale imaging system. Based on the modular design idea, the concentric spherical lens is used as the objective lens, which has no optical axis, making all subsystems adopt the same structure, greatly simplifying the design of the system. Several multiscale imaging systems with large FOV and super high pixels have been developed successively: the AWARE −2 system [14] , the AWARE −10 system [15] , AWARE −40 system [16–17] .
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 183>
Accession number:20220911734971
Title:Design and analysis of adaptive flexible support for cold optical lens
Authors:Ke, Shanliang (1); Zhang, Zhaohui (1); Jia, Xinyin (1, 2); Li, Libo (1); Chang, Chenguang (1, 2); Sun, Lijun (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optical Precision Machinery of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhang, Zhaohui
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121666G
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the increasing demand of infrared detection, the infrared cold optical technology has developed rapidly in recent decades. The low temperature deformation of infrared optical elements is one of the key factors restricting the development of infrared cold optical technology. The processing and assembly of optical subassemblies and support structures are carried out at room temperature and pressure, while the actual working environment of infrared system is relatively low temperature environment, which can vary by 200 degrees Kelvin or more. Therefore, the temperature adaptability of the support structure is strictly required. The optimal design flexible support of the 70mm diameter single crystal lens made by germanium was carried out to ensure that the component surface shape reached (1/6) λ and the natural frequency was above 200HZ at 100K low temperature in this paper. At the same time, the ISIGHT integrated optimization method was used to optimize the flexible support structure. The multi-objective integrated optimization of key dimensions of flexible support was completed, aiming at maximizing the fundamental frequency of the system and minimizing the lens surface shape errors. Finally, the optimal size was selected to complete the flexible structure design. In this paper, an adaptive flexible support structure for cold optical lens with three layers of stress release was designed by multi-objective integrated optimization method. Meanwhile, its performance was verified by low temperature tests. The results verified the reliability and the feasibility of the structure design and analysis.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:20
Main heading:Natural frequencies
Controlled terms:Ground supports - Reliability analysis - Flexible structures - Optical design - Optical instrument lenses - Room temperature - Single crystals
Uncontrolled terms:Cold optical - Design and analysis - Flexible supports - Integrated optimization - Lows-temperatures - Multi-objectives optimization - Optical lens - Optical technology - Optical- - Support structures
Classification code:408.2 Structural Members and Shapes - 641.1 Thermodynamics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 933.1 Crystalline Solids
Numerical data indexing:Size 7.00E-02m, Temperature 1.00E+02K
DOI:10.1117/12.2617758
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 184>
Accession number:20224513093520
Title:Remote Sensing Cross-Modal Retrieval by Deep Image-Voice Hashing (Open Access)
Authors:Zhang, Yichao (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:15
Issue date:2022
Publication year:2022
Pages:9327-9338
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing image retrieval aims at searching remote sensing images of interest among immense volumes of remote sensing data, which is an enormous challenge. Direct use of voice for human-computer interaction is more convenient and intelligent. In this article, a deep image-voice hashing (DIVH) method is proposed for remote sensing image-voice retrieval. First, the whole framework is composed of the image and the voice feature learning subnetwork. Then, the hash code learning procedure will be leveraged in remote sensing image-voice retrieval to further improve the retrieval efficiency and reduce memory footprint. Hash code learning maps the deep features of images and voices into a common Hamming space. Finally, image-voice pairwise loss is proposed, which considers the similarity preservation and balance of hash codes. The similarity preserving and the balance controlling term of the loss function improve the similarity preservation from original data space to the Hamming space and the discrimination of binary code, respectively. This unified cross-modal feature and hash code learning framework significantly reduce the semantic gap between the two modal data. Experiments demonstrate that the proposed DIVH method can achieve a superior retrieval performance than other state-of-the-art remote sensing image-voice retrieval methods.<br/></div> © 2008-2012 IEEE.
Number of references:49
Main heading:Semantics
Controlled terms:Codes (symbols) - Deep neural networks - Hash functions - Human computer interaction - Image enhancement - Image retrieval - Modal analysis - Network coding
Uncontrolled terms:Code - Convolutional neural network - Cross-modal - Cross-modal retrieval - Deep hashing - Features extraction - Hash code - Remote sensing images - Remote-sensing - Task analysis
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 921 Mathematics
DOI:10.1109/JSTARS.2022.3216333
Funding details: Number: 2020TD-015, Acronym: -, Sponsor: -;Number: 62271484, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 62271484, in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, and in part by the Innovation Capability Support Program of Shaanxi under Grant 2020TD-015.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 185>
Accession number:20222612285238
Title:Control system of intensified ultraviolet spectrometer in near space
Authors:Chen, Zhen (1); Li, Ran (1); Sun, Xin (1); Yang, Kai (1, 3); Wang, Bo (1); Bai, Yonglin (1); Wang, Le (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Cas, Xi'an; 710119, China; (2) National Astronomical Observatories, Cas, Beijing; 100101, China; (3) Graduate School of Chinese Academy of Sciences Cas, Beijing; 100039, China
Corresponding author:Chen, Zhen(chenzhen@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12254
Part number:1 of 1
Issue title:International Conference on Electronic Information Technology, EIT 2022
Issue date:2022
Publication year:2022
Article number:122542M
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510655096
Document type:Conference article (CA)
Conference name:2022 International Conference on Electronic Information Technology, EIT 2022
Conference date:March 18, 2022 - March 20, 2022
Conference location:Chengdu, China
Conference code:180151
Sponsor:Academic Exchange Information Center
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The ultraviolet (UV) spectrometer installed on the balloon platform is a cost-effective instrument to observe the UV spectrum of near space, which can meet the needs of biological evolution and planetary material exchange research. A control system of an enhanced UV spectrometer is designed in this paper. Firstly, the framework of the control system is introduced, and the functions of each module are described. Then, the solar angle sensor and automatic air pressure balance device in the enhanced detector module are introduced, making the detector operate safely and reliably in solar radiation and low-pressure environments. Next, the temperature controller is introduced, which can automatically adjust the heating power through the PID algorithm in the embedded chip according to the data collected from the light body and the atmosphere. Finally, the automatic detection mode is described. Among them, the controller can automatically adjust the system gain and integration time according to the spatial ultraviolet radiation intensity information, thus maximizing the efficiency of data. The flight test results of Honghu HH-20-7, HH-20-9 and HH-19-7 show that the spectrometer works normally in the flight experiment. Compared with the ultraviolet radiation in the MODTRAN database, the ultraviolet spectrum data of adjacent space obtained by the spectrometer has the same consistency, but provides a lot of detailed information.<br/></div> © 2022 SPIE.
Number of references:7
Main heading:Cost effectiveness
Controlled terms:Biology - Controllers - Solar radiation - Spectrometers - Temperature control - Ultraviolet radiation - Ultraviolet spectroscopy
Uncontrolled terms:Angle sensors - Cost effective - Near space - Radiation temperature - Solar angle - Solar angle sensor - Solar radiation, temperature controller, ultraviolet radiation - Temperature controllers - Ultra-violet spectrums - Ultraviolet spectrum
Classification code:461.9 Biology - 657.1 Solar Energy and Phenomena - 731.3 Specific Variables Control - 732.1 Control Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 911.2 Industrial Economics
DOI:10.1117/12.2640042
Funding details: Number: XDA17010203, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (grant XDA17010203).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 186>
Accession number:20224413027475
Title:Analysis of Influence of Doppler Asymmetric Spatial Heterodyne Interferogram Distortion on Phase Inversion Accuracy
Title of translation:多普勒差分干涉仪干涉图畸变对相位反演精度影响分析
Authors:Zhou, Guan (1, 2); Li, Libo (1); Fu, Di (1); Zhang, Yafei (1, 2); Feng, Yutao (1); Liu, Changhai (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Unit 63768 of PLA, Xi'an; 710200, China
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:6
Issue date:June 1, 2022
Publication year:2022
Article number:0601001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The wind information of the middle and upper atmosphere is very important to study the coupling of the upper and lower atmosphere and energy， to ensure the smooth development of spacecraft space activities， and to carry out medium and long-term meteorological predictions. The doppler asymmetric spatial heterodyne wind measurement technology is a technique based on the Fourier transform of the interferogram to realize the detection of the doppler frequency shift of the wind. Doppler asymmetric spatial heterodyne is a new passive wind detection technology. For the interferometer， the processing and assembly errors of optical components and structural components， and the aberration of the optical system will distort the interference image. Introducing inversion error in the process of wind speed measurement. The current research on DASH interferogram distortion has not analyzed the influence of interferogram distortion on the accuracy of Doppler phase inversion and lacks the quantitative theoretical basis for the design， processing， and adjustment of Doppler asymmetric spatial heterodyne. In this paper， we analyzed the sources of different distortion in Doppler asymmetric spatial heterodyne. Then by adding different types and sizes of interferogram distortions to the interferograms of the red and green oxygen emission line， the simulation compares the difference between the distorted interferogram’s and the ideal interferogram’s Doppler phase. By adding optical distortion， local bending， slanted fringes and frequency changed these four different forms of interferogram distortion， we got the influence of distortion on the accuracy of Doppler phase inversion. The results show that the Doppler phase error will increase with the increase of the target wind field and interferogram distortion. The Doppler phase error of optical distortion is also will increase with the increase of the target wind field but will fluctuate increase with the increase of interferogram distortion. Among these four different forms of interferogram distortion， the local bending of fringes has the greatest influence on Doppler phase inversion. The phase error increases by 0.113‰ for each additional pixel of the local bending. But the maximum phase error is only 0.03‰ under the condition of 2% distortion. To further explore the influence of local bending sizes and location， we simulate various interferograms with local bending of different sizes and locations. The result shows that the Doppler phase error fluctuation decreases and gradually converges when the size increases. And the phase error fluctuates with the change of position. The fluctuation amount in the first half is small， and the fluctuation in the second half increases gradually. The phase error generated by the same bending at the sampling center is larger than that at the sampling edge. Therefore， attention should be paid to the small distortion in the sampling center area， and if necessary， interferogram correction should be performed to reduce the phase error. The simulation of errors caused by local bending on systems with different fringe frequencies shows that the same amount of bending will have a greater impact on systems with high fringe frequencies. In addition， interferogram with a low signal-to-noise ratio usually uses multiple rows of pixels of the interferogram to reduce uncertainty of phase. Local modulation is reduced when multiple rows of pixels of the distorted interferogram are merged. In order to find out the actual impact of the distorted interferogram in multiple rows of pixels of interferogram， we simulate different interferograms with local bending of different local bending max offset， in different signal-to-noise ratio and modulation. The result shows that even local modulation is reduced when multiple rows of pixels of the distorted interferogram are merged， but the phase uncertainty of the interferogram will not increase. Therefore， even if the interferogram has defects， multiple rows of pixels can be merged to increase the signal-to-noise ratio and reduce the phase uncertainty. This article may provide a quantitative theoretical reference for the design， processing， and adjustment of the Doppler asymmetric spatial heterodyne.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:18
Main heading:Pixels
Controlled terms:Errors - Optical systems - Wind
Uncontrolled terms:Atmosphere wind field observation - Dopple asymmetric spatial heterodyne - Dopple phase error - Doppler - Field observations - Interferogram distortion - Interferograms - Multi-line pixel merging - Phase error - Spatial heterodyne - Wind field
Classification code:443.1 Atmospheric Properties - 741.3 Optical Devices and Systems
Numerical data indexing:Percentage 2.00E+00%
DOI:10.3788/gzxb20225106.0601001
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E1294301, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 41005019）， West Light Foundation of the Chinese Academy of Sciences （No. XAB 2016A07）， Natural Science Basic Research Program of Shaanxi Province （No. 2019JQ-931）， West Light Cross-Disciplinary Innovation Team of Chinese Academy of Sciences （No. E1294301）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 187>
Accession number:20221912090588
Title:Mapping distortion correction in off-axis aspheric mirror testing with a null compensator
Authors:Hao, Sanfeng (1, 2); Zhang, Jian (1, 3); Yang, Jianfeng (1); An, Fei (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xidian University, School of Mechano-Electronic Engineering, Shaanxi, Xi'an; 710071, China
Corresponding author:Zhang, Jian(zj@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:14
Issue date:May 10, 2022
Publication year:2022
Pages:4040-4046
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Mapping distortion can be introduced in null testing for off-axis aspheric surfaces, from which the testing results with coordinate deviation cannot be used to guide deterministic optical manufacturing. We propose a correction method for mapping distortion in this study based on the imaging distortion analysis of a null lens and iteration algorithm. We use imaging distortion data to fit the distortion polynomial function by the least-squares method, and we design an iteration algorithm to determine the rotation angle and the position of the null distortion point of the testing results. Finally, the mapping distortion can be accomplished without any markers on the mirror under test. The 280 mm × 180 mm primary mirror and 234 mm × 176 mm tertiary mirror of the hyperspectral camera were tested with a null compensator, and the distortion correction results were obtained using the proposed method. After magnetorheological finishing based on the correction results, the rms of the primary mirror and tertiary mirror reduced from 0.263 λ to 0.013 λ and 0.059 λ to 0.018 λ (λ = 632.8 nm), respectively.<br/></div> © 2022 Optica Publishing Group.
Number of references:26
Main heading:Mirrors
Controlled terms:Least squares approximations - Iterative methods - Mapping
Uncontrolled terms:Aspheric mirrors - Distortions corrections - Iteration algorithms - Mapping distortion - Null compensator - Off-axis aspheric - Off-axis aspheric surfaces - Primary mirrors - Surface from - Tertiary mirror
Classification code:405.3 Surveying - 741.3 Optical Devices and Systems - 921.6 Numerical Methods
Numerical data indexing:Size 1.76E-01m, Size 1.80E-01m, Size 2.34E-01m, Size 2.80E-01m, Size 6.328E-07m
DOI:10.1364/AO.452951
Funding details: Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: XAB2016A10, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funding. Key Program of Research and Development of Shanxi Province of China (2018ZDXM-GY-105); Chinese Academy of Science"Light of West China" Program (XAB2016A10).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 188>
Accession number:20220911734922
Title:Design and analysis of bonding process of the space-based rectangular curved prisms
Authors:Jia, Xinyin (1, 2); Wang, Feicheng (1); Ke, Shanliang (1); Hu, Bingliang (1); Li, Libo (1); Zhang, Zhaohui (1); Li, Siyuan (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optical Precision Machinery of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:1216652
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The curved prisms have been widely used as a light splitting element because of its own focal power and can be set in nonparallel light path. When the effective light transmission area of large-size curved prism is rectangular or elliptical, it can be processed into rectangular optical elements during processing, which can reduce the volume and mass of the instrument on the one hand, and effectively block the stray light outside the field of view on the other hand. Adhesive fixation is one of the common fixation methods of optical elements, which is applied in many launched spaceborne remote sensors. However, the adhesive bonding process and adhesive strength are unstable and the bonding reliability is poor, resulting in the calculated theoretical bonding area and adhesive layer thickness are often difficult to meet the requirements of complex mechanical and thermal environment. The rigid-flexible dual mode coupling support structure for space-based rectangular curved prism was firstly introduced. And then the tensile and shear tests on the epoxy adhesive used in this project was carried out and the bonding area based on the strength test was designed. On this basis, the mechanical test of the simulator mirror group was carried out to verify the reliability of the bonding area and the design of the support structure. Finally, three bonding postures were simulated analysis and tests including prone, lateral and vertical bonding. The results showed that the vertical bonding was the smallest surface shape errors of the curved prism. Based on this bonding attitude, the bonding and mechanical tests of the curved prism were completed to verify the reliability and rationality of the bonding process.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Reliability
Controlled terms:Rigid structures - Light transmission - Prisms - Ground supports - Stray light - Optical systems - Adhesives - Remote sensing
Uncontrolled terms:Adhesives bonding - Bonding process - Curved prisms - Design and analysis - Light splitting - Mechanical - Mechanical test - Power - Space-based - Support structures
Classification code:408 Structural Design - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2617418
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 189>
Accession number:20222312201881
Title:Research on Image Motion Compensation Technology of Aerial Camera with Fast Sweeping
Authors:Chen, Weining (0, 1); Cheng, Gong (2); Yang, Hongtao (3); Chang, Sansan (3); Peng, Jianwei (3)
Author affiliation:(1) Xi an Institute of Optics and Precision, Mechanics of CAS, Xi'an; 710119, China; (2) Northwestern Polytechnical University, Xi'an; 710072, China; (3) ChinaXi an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICMIP 2022 - Proceedings of 2022 7th International Conference on Multimedia and Image Processing
Issue date:January 14, 2022
Publication year:2022
Pages:124-130
Language:English
ISBN-13:9781450387408
Document type:Conference article (CA)
Conference name:7th International Conference on Multimedia and Image Processing, ICMIP 2022
Conference date:January 14, 2022 - January 16, 2022
Conference location:Virtual, Online, China
Conference code:179483
Sponsor:Tianjin University of Technology and Education
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the efficiency of remote sensing imaging, aerial cameras use vertical swing sweep motion to take imaging. Because the optical axis of the camera rotates at a certain speed in the swing sweep direction, there is a gap between the image formed by the imaging target on the focal plane and the photosensitive medium. Relative motion brings about image motion blur, which will seriously affect the image quality of the camera. Eliminating the problem of image quality degradation caused by this scanning image shift is a problem that must be solved for wide-scan imaging. In the thesis, the mechanism of side-sweeping and the effect of image shifting on the image are analyzed, and the necessity of image-shift compensation is explained. The design adopts an optical mirror-based swing-sweeping image shift. The compensation device performs scanning image motion compensation, and calculates the principle and accuracy of image motion compensation. Through ground image motion compensation test and flight test test, the image motion compensation imaging effect is good, which can meet the requirements of pendulum sweep aerial imaging image motion compensation.<br/></div> © 2022 ACM.
Number of references:11
Main heading:Mirrors
Controlled terms:Antennas - Cameras - Image quality - Motion compensation - Remote sensing
Uncontrolled terms:Aerial camera - Compensation technology - High Speed - High-speed swing mirror; - Image motion - Image motion compensation - Image shifts - Imaging width - Scan images - Swing-scan image motion
Classification code:741.3 Optical Devices and Systems - 742.2 Photographic Equipment
DOI:10.1145/3517077.3517097
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 190>
Accession number:20225113257776
Title:Research on focal length calibration method of oblique installation collimator
Title of translation:倾斜安装的光管焦距标定方法研究
Authors:Wang, Tao (1); Tian, Liude (1); Zhao, Jianke (1); Zhou, Yan (1); Kewei, E. (1); Liu, Kai (1); Liu, Shangkuo (1); Liu, Fei (2); Yang, Lihong (3); Liu, Yining (1); Xue, Xun (1); Zhao, Huaixue (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (3) School of Optoelectronics Engineering, Xi’an Technological University, Xi'an; 710021, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:20220124
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">When the collimator is placed horizontally and installed obliquely, its optical parameters will be greatly different due to different stress states. In order to accurately evaluate the focal length of collimator, according to the mapping relationship between the point on the focal plane of the collimator and the angle of the total station, an accurate mathematical model of the relationship between the focal length and the angle of the total station under the condition of oblique installation is established, the principle projection error caused by the rotation of the vertical axis of the total station is corrected. Several groups of data are collected by total station and experimental verification is carried out. After correcting the distortion, the focal length calculated by each testing point when the line segment is parallel to the vertical wire are 1 980.03 mm, 1 983.45 mm, 1 982.79 mm, the average focal length, i.e. the true value, is 1 982.09 mm. When the distortion is corrected but the projection error is not corrected, the focal length calculated from each testing point when the line segment is parallel to the horizontal wire of the reticle is 996.42 mm, 995.23 mm, 995.22 mm, the relative error of the average focal length is 50.2%. The range of focal length calculated by each testing point when the line segment is located in different quadrants and parallel to the horizontal wire of the reticle is 4.74 mm after correcting the projection error and distortion, the average focal length of all testing points is 1982.69 mm, the difference between the average value and the true value is 0.6 mm. The maximum relative error between the extended uncertainty of the focal length calculated by different testing point and the true value of the focal length is 0.36%. This value is far less than the stipulation in GB/T 9917.1-2002 that the relative error between the measured focal length and the nominal focal length in the photographic lens does not exceed ±5%. The experimental results show that the model has universality and high accuracy, the phase of the target slit in the reticle is allowed to be a random value, there is no need to adjust the slit to be strictly parallel to the vertical wire of the total station, the model has great engineering application value for the in-situ detection of the focal length of the collimator under the condition of oblique installation.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:17
Main heading:Wire
Controlled terms:Errors - Optical collimators - Optical instruments
Uncontrolled terms:Calibration method - Condition - Focal length calibration - Focal lengths - In-situ calibration - Line-segments - Projection error - Random-phase - Relative errors - Total station
Classification code:535.2 Metal Forming - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Percentage 3.60E-01%, Percentage 5.00E+00%, Percentage 5.02E+01%, Size 1.98269E+00m, Size 4.74E-03m, Size 6.00E-04m, Size 9.8003E-01m, Size 9.8209E-01m, Size 9.8279E-01m, Size 9.8345E-01m, Size 9.9522E-01m, Size 9.9523E-01m, Size 9.9642E-01m
DOI:10.3788/IRLA20220124
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 191>
Accession number:20224813187766
Title:Gain-switched watt-level thulium-doped fiber laser and amplifier operating at 1.7 m (Open Access)
Authors:Xiao, Yang (1, 2); Xiao, Xusheng (1, 2); Liu, Lutao (1, 2); Guo, Haitao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Center for Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
Corresponding authors:Guo, Haitao(guoht_001@opt.ac.cn); Xiao, Xusheng(xiaoxusheng@opt.ac.cn)
Source title:High Power Laser Science and Engineering
Abbreviated source title:High Power Laser Sci. Eng.
Volume:10
Issue date:November 13, 2022
Publication year:2022
Article number:e40
Language:English
E-ISSN:20523289
Document type:Journal article (JA)
Publisher:Cambridge University Press
Abstract:<div data-language="eng" data-ev-field="abstract">A 1.7 m gain-switched thulium-doped all-fiber laser with a master oscillator power amplifier (MOPA) configuration, utilizing a bandpass fiber filter and a 1550 nm erbium/ytterbium-codoped fiber MOPA, is demonstrated. The influences of pump pulse parameters (repetition rate and pulse duration) and laser cavity structures (ring and linear) on the laser performances were experimentally investigated. To the best of our knowledge, the power quenching and drop were observed in the 1.7 m gain-switched thulium-doped fiber lasers for the first time, resulting from the mode-locked-resembling operation and nonlinear effects. Moreover, the fiber ring-cavity laser was more stable than the linear-cavity laser in the time domain and power. Finally, a laser with a maximum average power of 1.687 W, a slope efficiency of 19.7%, a single-pulse energy of 16.87 J, a pulse width of 425 ns, a repetition rate of 100 kHz and a peak power of 39.69 W was obtained.<br/></div> ©
Number of references:41
Main heading:Fiber lasers
Controlled terms:Erbium - Fiber amplifiers - Fibers - Optical pumping - Power amplifiers - Pulse repetition rate - Thulium
Uncontrolled terms:1.7 μm - Cavity lasers - Gain switching - Gain-switched - Master oscillator power amplifiers - Power - Power roll-off - Repetition rate - Thulium-doped - Thulium-doped fibers
Classification code:547.2 Rare Earth Metals - 713.1 Amplifiers - 744.1 Lasers, General - 744.4 Solid State Lasers
Numerical data indexing:Energy 1.687E-05J, Frequency 1.00E+05Hz, Percentage 1.97E+01%, Power 1.687E+00W, Power 3.969E+01W, Size 1.55E-06m, Size 1.70E-06m, Time 4.25E-07s
DOI:10.1017/hpl.2022.33
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 192>
Accession number:20223812758493
Title:Retrieval of Water Parameters from Absorption Spectrum Based on Convolutional Neural Network
Authors:Liu, Yuyang (1, 2); Wang, Xueji (1); Liu, Xiao (1); Liu, Hong (1); Liu, Jiacheng (1, 2); Wang, Quan (1); Yu, Tao (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:2022 3rd International Conference on Geology, Mapping and Remote Sensing, ICGMRS 2022
Abbreviated source title:Int. Conf. Geol., Mapp. Remote Sens., ICGMRS
Part number:1 of 1
Issue title:2022 3rd International Conference on Geology, Mapping and Remote Sensing, ICGMRS 2022
Issue date:2022
Publication year:2022
Pages:442-445
Language:English
ISBN-13:9781665485951
Document type:Conference article (CA)
Conference name:3rd International Conference on Geology, Mapping and Remote Sensing, ICGMRS 2022
Conference date:April 22, 2022 - April 24, 2022
Conference location:Zhoushan, China
Conference code:182154
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In the field of water quality monitoring, the traditional chemical detection methods are time-consuming and laborious, and the operation process is complicated. The technology of absorption spectrum is used to retrieve water quality parameters, which has the advantages of less time-consuming, no secondary pollution, and easy operation. Under the condition of a small dataset, we utilize the convolutional neural network (CNN) combining channel attention module (CAM) to predict three water quality parameters, including suspended solids (SS), chemical oxygen demand (COD), and chromaticity. In this paper, the water quality parameters and corresponding absorption spectra of 50 groups of samples from the mainstream of the Yangtze River were measured by the chemical approach. At the same time, to solve the problem that it is difficult for the neural network to learn effective feature representation under the condition of the small dataset, we propose a loss function combining improved L1 Loss and mean absolute percentage error (MAPE). Our scheme has achieved good results in predicting SS, COD, and chromaticity. The determination coefficients (R2) of SS, COD, and chromaticity of the testing data are 0.93, 0.91, and 0.93 respectively. The results show that the method proposed in this paper can alleviate the over-fitting impact of neural network regression under the condition of small datasets, and at the same time improve the retrieving performance of water quality parameters.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Absorbance
Controlled terms:Absorption spectra - Absorption spectroscopy - Chemical detection - Chemical oxygen demand - Convolution - Convolutional neural networks - Deep neural networks - Water absorption - Water quality
Uncontrolled terms:Absorbances - Channel attention - Chemical-oxygen demands - Condition - Convolutional neural network - Deep learning - Neural-networks - Small data set - Suspended solids - Water quality parameters
Classification code:445.2 Water Analysis - 461.4 Ergonomics and Human Factors Engineering - 711.2 Electromagnetic Waves in Relation to Various Structures - 716.1 Information Theory and Signal Processing - 801 Chemistry - 802.3 Chemical Operations - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1109/ICGMRS55602.2022.9849311
Funding details: Number: 2019SF-254, Acronym: -, Sponsor: -;Number: XDA23040101, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020-XXX-014-01, Acronym: -, Sponsor: National Defense Science and Technology Innovation Fund of the Chinese Academy of Sciences;
Funding text:ACKNOWLEDGMENT This work was supported in part by the National Defense Science and Technology Innovation Special Zone Project under Grant 2020-XXX-014-01, in part by the Chinese Academy of Sciences Strategic Science and Technology Pilot Project A under Grant XDA23040101, and in part by the Shanxi provincial key R&D plan project under Grant 2019SF-254.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 193>
Accession number:20222912363745
Title:High-Precision Volume Measurement of Potholes in Pavement Maintenance (Open Access)
Authors:Huang, Huimin (1); Zhou, Zuofeng (2); Liu, Mulong (3); Wu, Qingquan (2); Hu, Guoliang (1); Cao, Jianzhong (2)
Author affiliation:(1) College of Information Engineering, Northwest A&F University, Yangling; 712100, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) School of Science, Northwest A&F University, Yangling; 712100, China
Corresponding author:Zhou, Zuofeng(zfzhou@opt.ac.cn)
Source title:Mathematical Problems in Engineering
Abbreviated source title:Math. Probl. Eng.
Volume:2022
Issue date:2022
Publication year:2022
Article number:9157849
Language:English
ISSN:1024123X
E-ISSN:15635147
Document type:Journal article (JA)
Publisher:Hindawi Limited
Abstract:<div data-language="eng" data-ev-field="abstract">Accurate three-dimensional measurement of potholes is a significant concern in road maintenance. However, the assessment of road potholes still relies heavily on human inspectors to make maintenance suggestions. To realize full-field measurement of pavement pothole automatically, a high-precision volume measurement method based on second-order Taylor expansion is proposed, where the second-order Taylor estimation of each point is converted into a convolution operation. On the one hand, this method discards the second-order fitting of the surface, which greatly reduces the computational complexity. On the contrary, the second-order Taylor estimation is not restricted by the surface shape because it only depends on the distribution of the adjacent points. Experiments on synthesized and real point sets demonstrate that the proposed method outperforms the state-of-the-art methods under various point cloud shapes.<br/></div> © 2022 Huimin Huang et al.
Number of references:31
Main heading:Volume measurement
Controlled terms:Landforms - Maintenance - Pavements - Titration
Uncontrolled terms:Full-field measurement - High-precision - Human inspectors - Measurement methods - Measurements of - Pavement maintenance - Road maintenance - Second orders - Second-order Taylor expansion - Three-dimensional measurements
Classification code:481.1 Geology - 801 Chemistry - 913.5 Maintenance - 943.2 Mechanical Variables Measurements
DOI:10.1155/2022/9157849
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 194>
Accession number:20222012128358
Title:Meta Self-Supervised Learning for Distribution Shifted Few-Shot Scene Classification
Authors:Gong, Tengfei (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology Cas, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Article number:6510005
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Few-shot classification tries to recognize novel remote sensing image categories with a few shot samples. However, current methods assume that the test dataset shares the same domain with the labeled training dataset where prior knowledge is learned. It is infeasible to collect a training dataset for each domain, since remote sensing images may come from various domains. Exploiting the existing labeled dataset from another domain (source domain) to help the target dataset (target domain) classification would be efficient. In this letter, both meta-learning and self-supervised learning are jointly conducted for few-shot classification. Specifically, meta-learning is executed over a pretrained network for few-shot classification. Furthermore, self-supervised learning is exploited to fit the target domain distribution by training on unlabeled target domain images. Experiments are conducted on NWPU, EuroSAT and Merced datasets to validate the effectiveness.<br/></div> © 2004-2012 IEEE.
Number of references:15
Main heading:Supervised learning
Controlled terms:Statistical tests - Remote sensing - Classification (of information)
Uncontrolled terms:Domain shift - Features extraction - Few-shot learning - Remote sensing images - Remote-sensing - Scene classification - Self-supervised learning - Shot classification - Target domain - Task analysis
Classification code:716.1 Information Theory and Signal Processing - 903.1 Information Sources and Analysis - 922.2 Mathematical Statistics
DOI:10.1109/LGRS.2022.3174277
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 195>
Accession number:20215011322971
Title:Enhancement of UV laser-induced damage resistance of the fluoride-containing phosphate glasses by regulating the intrinsic defects
Authors:Li, Shengwu (1, 2); Wan, Rui (1, 2); Ma, Yuan (1, 2); Wang, Pengfei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Volume:105
Issue:4
Issue date:April 2022
Publication year:2022
Pages:2546-2555
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Low fluorine content containing fluorophosphate glasses have promising potential as ultraviolet (UV) optics to be used in high-energy laser systems. Systematic studies on the iron-doped and iron-free fluoride-containing phosphate glasses that were prepared at high and low melting temperatures explore the underlying interrelationship among the glass preparation conditions, intrinsic defects in produced glasses, and the anti-laser-damage properties. For the iron-doped fundamental frequency (1ω) absorptive glass, melting at high-temperature (1200°C) can reduce the extrinsic "impurity" concentration of Fe<sup>3+</sup> ions, resulting in tiny increase of optical bandgap (by 1.6%) but significant reduce of the absorption coefficient by 34% at 355 nm. However, only tiny increase of the laser-induced damage threshold (LIDT) was achieved. For the iron-free third harmonic frequency (3ω) transparent glass, low-temperature (1000°C) melting process significantly reduced the absorptive intrinsic defects content of PO<inf>3</inf>-EC, PO<inf>4</inf>-EC, and phosphorous oxygen-bonded hole center defects, which made the UV absorption edge blue-shifted by 50 nm and the optical bandgap increased by ∼18%. The UV (355 nm) LIDT was significantly enhanced by ∼27%. Much lower absorption coefficient and larger bandgap of the iron-free glass relative to the iron-doped one endow it with larger a LIDT. In short, optimizing the glass melting temperature is a feasible method to enhance the UV laser-induced damage resistance of the fluoride-containing phosphate glasses through controlling the content of the extrinsic or intrinsic defects in produced glasses. The general routine is to achieve both the lower UV absorptive defect concentration (i.e., lower UV absorption at 355 nm) and the lower non-bridged oxygen ratio (i.e., denser glass network), as well as a larger optical bandgap (i.e., reduced probability of avalanche ionization breakdown), which together contribute to the enhancement of the anti-laser-damage performance of the investigated fluoride-containing phosphate glasses.<br/></div> © 2021 The American Ceramic Society
Number of references:40
Main heading:Glass
Controlled terms:Iron compounds - Laser damage - Optical materials - Optical band gaps - Light absorption - Energy gap - Defects - Fluorine compounds - Ultraviolet lasers
Uncontrolled terms:Absorption coefficients - Fluoride-containing phosphate glass - Fluorine content - Intrinsic defects - Iron-doped - Laser induced damage thresholds - Laser-induced damage resistances - Optical-bandgap - Phosphate glass - Ultraviolet absorption
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 812.3 Glass - 931.4 Quantum Theory; Quantum Mechanics - 951 Materials Science
Numerical data indexing:Percentage 1.60E+00%, Percentage 1.80E+01%, Percentage 2.70E+01%, Percentage 3.40E+01%, Size 3.55E-07m, Size 5.00E-08m, Temperature 1.273E+03K, Temperature 1.473E+03K
DOI:10.1111/jace.18255
Funding details: Number: 11972313,61775235, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2016A08, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2017446, Acronym: -, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY‐251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work is financially supported by the National Natural Science Foundation of China (NSFC numbers: 61775235 and 11972313), Shaanxi Provincial Key Research and Development Program (2021GY‐251), West Young Scholars Program of the Chinese Academy of Sciences (XAB2016A08), and Youth Innovation Promotion Association, CAS (2017446).This work is financially supported by the National Natural Science Foundation of China (NSFC numbers: 61775235 and 11972313), Shaanxi?Provincial?Key?Research?and?Development?Program (2021GY-251), West Young Scholars Program of the Chinese Academy of Sciences (XAB2016A08), and Youth Innovation Promotion Association, CAS (2017446).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 196>
Accession number:20220111425683
Title:A Novel Optical Frequency-Hopping Scheme Using Dual Drive Mach-Zehnder Modulator (Open Access)
Authors:Jin, Ya (1); Chen, Shaokang (2); Xie, Zhuang (3); Zhai, Kunpeng (1); Xu, Changda (1); Wang, Jian (1); Chen, Yinfang (4); Wen, Huashun (4); Liu, Yu (4); Chen, Wei (4); Zhu, Ninghua (4)
Author affiliation:(1) State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China; (2) State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China
Corresponding author:Chen, Yinfang(yfchen17@semi.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:1
Issue date:February 1, 2022
Publication year:2022
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A novel optical frequency-hopping (OFH) scheme using dual-drive Mach-Zehnder modulator (DD-MZM) is proposed and demonstrated for secure transmission in fiber-optic networks. In the proposed scheme, by adjusting the phase difference between the radio frequency (RF) signals loaded on the two arms of the DD-MZM, and filtering the center carrier by fiber Bragg grating (FBG), thus the upper and lower output spectra can be realized randomly hop between the positive and negative first-order sidebands and serve as carriers for data modulation. And the data of different users are divided into many data slices in the time domain and then modulated to these carriers. To verify the feasibility of the proposed OFH scheme, we demonstrate an error-free transmission through 40 km fiber with 10 Gbps hopping rate and 10 Gbps data rate by simulation tools. In addition, we also establish a theoretical model to evaluate the security performance quantitatively, and the results show that the computing power required by illegal third parties to crack through brute force reaches 1.07 × 1027 calculations per second under certain conditions, which is almost impossible. Our OFH scheme has provided a deeper insight into physical layer security.<br/></div> © 2009-2012 IEEE.
Number of references:16
Main heading:Digital storage
Controlled terms:Optical signal processing - Natural frequencies - Network security - Time domain analysis - Light transmission - Network layers - Light modulation - Light modulators - Optical materials
Uncontrolled terms:Dual drive mach-zehnde modulator - Dual drives - Fiber gratings - Frequency-shift-keying - Mach Zehnder modulator - Optical fiber dispersion - Optical fiber networks - Optical frequency - Optical frequency hopping - Physical layer security - Secure transmission
Classification code:722.1 Data Storage, Equipment and Techniques - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics
Numerical data indexing:Bit rate 1.00E+10bit/s, Size 4.00E+04m
DOI:10.1109/JPHOT.2021.3136856
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 197>
Accession number:20230613564638
Title:Synthesis and characteristics of BaYF5:Yb3+, Er3+@BaYF5 nanoparticles as a new near-infrared fluorescence bioimaging probe
Authors:Yang, Liqing (1); Yang, Xiaoqing (2); Gao, Fei (1); Fan, Qi (1)
Author affiliation:(1) Chinese Academy of Science, Xi'An Institute of Optics and Precision Mechanics, Photonic Functional Materials and Devices, State Key Laboratory of Transient Optics and Photonics, Xi'an, China; (2) Shandong University, Cheeloo College of Medicine, Weihai Municipal Hospital, Weihai, China
Corresponding author:Fan, Qi(fanqi@opt.ac.cn)
Source title:Journal of Nanophotonics
Abbreviated source title:J. Nanophoton.
Volume:16
Issue:4
Issue date:October 1, 2022
Publication year:2022
Report number:22060G
Article number:046009
Language:English
E-ISSN:19342608
CODEN:JNOACQ
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Fluorescent bioimaging technology has been widely used in clinic because of its high sensitivity, quick feedback, and no radiation. Among them, NIR-II imaging has lower absorption, tissue scattering, self-fluorescence, and higher signal-To-noise ratio. As a precursor of nanoprobe, BaYF5 is an excellent material due to its low phonon energy, which makes it easy to achieve rare earth ion energy level transition and obtain strong upconversion luminescence. A near-infrared II (NIR-II) rare earth fluoride nanoparticle (NP) BaYF5: Yb3+, Er3+ @ BaYF5 has been constructed. The luminescence principle of the material was deeply analyzed, and the influence of different doping ion ratio on fluorescence intensity was explored. Finally, the optimal doping ratio for this matrix material was obtained. In addition, according to the surface properties of the materials, the water solubility and biocompatibility of the NPs were significantly improved by the modification. Our work also systematically tested and analyzed the cytotoxicity, hematotoxicity, and tissue toxicity of the NPs and finally realized the high-resolution fluorescence imaging in living mice. This NP can be used as an effective and safe NIR-II contrastive agent, which provides the possibility for the detection and monitoring of physiological activity under deep tissue in vivo.<br/></div> © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:21
Main heading:Fluorine compounds
Controlled terms:Barium compounds - Biocompatibility - Erbium compounds - Fluorescence imaging - Infrared devices - Mammals - Metal ions - Nanoparticles - Rare earths - Signal to noise ratio - Synthesis (chemical) - Tissue - Ytterbium compounds
Uncontrolled terms:Bio-imaging - Fluorescent bioimaging - High sensitivity - In-Vivo imaging - Lanthanide nanoparticles - Near Infrared - Near-infrared - Near-infrared fluorescence - Near-infrared II - Photo-stability
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9.1 Immunology - 531.1 Metallurgy - 716.1 Information Theory and Signal Processing - 746 Imaging Techniques - 761 Nanotechnology - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 933 Solid State Physics
DOI:10.1117/1.JNP.16.046009
Funding details: Number: 2021GY-219,2021SF-174, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work was supported by two Key Research and Development Plan of Shaanxi Province (Grant Nos. 2021GY-219 and 2021SF-174). No potential conflicts of interest were reported by the author(s).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 198>
Accession number:20222112148946
Title:Reconstruction of Hadamard coded spectral data based on diffraction theory (Open Access)
Title of translation:基于衍射理论的哈达玛编码光谱成像数据重构 (Open Access)
Authors:Liu, Wen-Long (1, 2); Liu, Xue-Bin (1); Wang, Shuang (1); Yan, Qiang-Qiang (1)
Author affiliation:(1) CAS Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yan, Qiang-Qiang(yanqiangqiang@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:9
Issue date:May 5, 2022
Publication year:2022
Article number:094201
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Hardmard transfer imaging spectrometer (HTIS) is a novel computationally optical system. Its characteristic of multi-channel multiplexing increases the luminous flux of the optical system without sacrificing spatial resolution, thereby enabling the system's signal-to-noise ratio to be significantly higher than traditional spectrometer's. Encoding with digital mirror devices (DMD) in the system causes a serious diffraction effect that gives rise to the apparent degradation of the imaging formation. For improving the image quality and spectral accuracy of the reconstructed data cube, the Hadamard coded spectral imaging data degradation model is established based on the scalar diffraction theory. A data reconstruction algorithm is proposed based on the Lucy Richardson (L-R) algorithm. Through the simulation experiment, the process of image degradation is revealed. On the one hand, it proves that the degradation of system imaging diffraction is the main reason for the distortion of reconstructed data. On the other hand, it verifies the effectiveness of the correction method adopted in this paper. The evaluation result of the spectral angle distance of the restored data cube after L-R correction is 0.1296, and the image similarity evaluation factor is better than 0.85. Compared with the reconstructed data before being corrected, the corrected data is greatly improved in quality. The experimental results show that the algorithm has a good correction effect on the data cube reconstruction of HTIS.<br/></div> Copyright © 2022 Acta Physica Sinica. All rights reserved.
Number of references:26
Main heading:Optical systems
Controlled terms:Digital devices - Image enhancement - Image quality - Quality control - Diffraction - Signal to noise ratio - Electrons - Image coding - Spectrometers - Spectroscopy - Geometry - Image reconstruction - Restoration
Uncontrolled terms:Data cube - Data reconstruction - Hadamard - Hadamard coding - Image diffraction degradation - Image diffractions - Imaging spectrometers - Lucy-Richardson - Spectral correction - Spectral imaging
Classification code:716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems - 913.3 Quality Assurance and Control - 921 Mathematics
DOI:10.7498/aps.71.20211977
Funding details: Number: 2021JQ-323, Acronym: -, Sponsor: Natural Science Foundation of Shanxi Province;Number: -, Acronym: -, Sponsor: Young Scientists Fund;
Funding text:* Project supported by the Young Scientists Fund of the Natural Science Foundation of Shanxi Province, China (Grant No. 2021JQ-323). † Corresponding author. E-mail: yanqiangqiang@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 199>
Accession number:20223312565529
Title:A Dual-Position Loop LLADRC Control Method Based on Harmonic Gear Drive (Open Access)
Authors:Cao, Yu (1, 2, 3, 4); Wang, Fan (1, 4); Li, Xin (1, 4); Su, Xiuqin (1, 4); Guo, Shan (1); Han, Junfeng (1, 4); Xie, Meilin (1, 4); Wang, Lei (1); Feng, Xubin (1, 4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China
Corresponding author:Cao, Yu(caoyu@opt.ac.cn)
Source title:Mathematical Problems in Engineering
Abbreviated source title:Math. Probl. Eng.
Volume:2022
Issue date:2022
Publication year:2022
Article number:9434247
Language:English
ISSN:1024123X
E-ISSN:15635147
Document type:Journal article (JA)
Publisher:Hindawi Limited
Abstract:<div data-language="eng" data-ev-field="abstract">High-resolution imaging has become a development trend and is widely used in military and civil fields. As the carrying equipment of imaging system, the speed stability of tracking turntable is the basis of high-resolution and stable imaging. At present, in the aerospace field, there are high requirements for peak power dissipation and holding torque, so flexible joints such as harmonic gear drive are mostly used to realize the function. The characteristics of flexible load have a great impact on the characteristics of motion control, which is easy to cause mechanical resonance, lead to system instability, and have a great impact on speed stability and position tracking accuracy. Therefore, it is necessary to study the servo system of flexible load. In order to solve the problems of high-precision position control and speed stability at low speed of flexible turntable with uncertain load, on the one hand, we comprehensively consider the advantages and disadvantages of semi-closed-loop and full closed-loop control and design a dual-position loop feedback control system combined with the analysis of dynamic equation to realize speed stability and high-precision position control. On the other hand, according to the requirements of the speed stability at low speed of the turntable, the tracking differentiator (TD) is designed innovatively through the language three-point interpolation subdivision and five-point pre-deduction calculation method. Finally, a dual-position loop LLADRC (language linear active disturbances rejection controller) control method based on harmonic gear drive is studied. By comparing the semi-closed loop, dual-position loop, dual-position loop LADRC (linear active disturbances rejection controller, ADRC), and dual-position loop LLADRC methods through simulation analysis, it can be shown that the double position LLADRC control method is obviously superior to other schemes in terms of rapidity, speed stability at low speed, and position tracking accuracy. The theoretical research is verified by experimental test. When the given speed is 0.1°/s, taking the pitch axis as an example, the pitch speed error is 0.0039°/s (3σ). When the maximum speed of the given curve is 20°/s and the maximum acceleration is 16°/s, the position tracking error is 0.0025° (3σ). This control method solves the problems of system instability and low-speed stability in high-precision control of turntable system based on harmonic gear drive and provides a method for high-precision control of high-resolution imaging turntable.<br/></div> © 2022 Yu Cao et al.
Number of references:16
Main heading:Controllers
Controlled terms:Adaptive control systems - Closed loop control systems - Feedback control - Harmonic analysis - Phonographs - Position control - Speed - System stability - Tracking (position)
Uncontrolled terms:Active disturbance rejection - Control methods - Flexible loads - Gear drives - High-precision position - High-resolution imaging - Low speed - Position loops - Speed stability - Tracking accuracy
Classification code:731.1 Control Systems - 731.3 Specific Variables Control - 732.1 Control Equipment - 752.3.1 Sound Reproduction Equipment - 921.6 Numerical Methods - 961 Systems Science
DOI:10.1155/2022/9434247
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 200>
Accession number:20213410817489
Title:Spectral Super-Resolution of Multispectral Images Using Spatial–Spectral Residual Attention Network
Authors:Zheng, Xiangtao (1); Chen, Wenjing (2, 3); Lu, Xiaoqiang (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The spectral super-resolution of multispectral image (MSI) refers to improving the spectral resolution of the MSI to obtain the hyperspectral image (HSI). Most recent works are based on the sparse representation to unfold the MSI into the 2-D matrix in advance for subsequent operations, which results in that the spatial information of MSI cannot be fully explored. In this article, a spatial–spectral residual attention network (SSRAN) is proposed to simultaneously explore the spatial and spectral information of MSI for reconstructing the HSI. The proposed SSRAN is composed of the feature extraction part, the nonlinear mapping part, and the reconstruction part. Firstly, the multispectral features of the input MSI are extracted in the feature extraction part. Second, in the nonlinear mapping part, the spatial–spectral residual blocks are proposed to explore spatial and spectral information of MSI for mapping the multispectral features to the hyperspectral features. Finally, in the reconstruction part, a 2-D convolution is used to reconstruct the HSI from the hyperspectral features. Also, a neighboring spectral attention module is specially designed to explicitly constrain the reconstructed HSI to maintain the correlation among neighboring spectral bands. The proposed SSRAN outperforms the state-of-the-art methods on both simulated and real databases.<br/></div> © 2021 IEEE.
Number of references:49
Main heading:Image reconstruction
Controlled terms:Convolution - Feature extraction - Spectroscopy - Extraction - Image enhancement - Photomapping - Hyperspectral imaging - Optical resolving power
Uncontrolled terms:2-D convolution - Multispectral images - Nonlinear mappings - Sparse representation - Spatial informations - Spectral information - State-of-the-art methods - Super resolution
Classification code:405.3 Surveying - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 742.1 Photography - 746 Imaging Techniques - 802.3 Chemical Operations
DOI:10.1109/TGRS.2021.3104476
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 201>
Accession number:20221912084165
Title:High power laser incoherent spatial beam combining with rectangular spot
Title of translation:高功率矩形光斑激光非相干空间合束
Authors:Wang, Yi (1, 2); Lei, Guangzhi (3); Yu, Lidong (1, 2); Zha, Rongwei (1, 2); Zhou, Jingfeng (1, 2); Bai, Yang (1, 2)
Author affiliation:(1) Institute of Photonics & Photon-Technology, Northwest University, Xi'an; 710127, China; (2) State Key Laboratory of Photon-Technology in Western China Energy, Xi'an; 710127, China; (3) Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:4
Issue date:April 25, 2022
Publication year:2022
Article number:20210268
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">This work lays a foundation for promoting the application of incoherent spatial combining laser in laser surface heat treatment with high speed and flexible processing. 18 semiconductor laser beams at 972 nm output by the fiber were arranged in parallel according to the "matrix". By implementing beam collimation and incoherent spatial beam combination, a 10 kW combined laser beam with rectangular spot characteristics was obtained. The radius of the collimated laser beam, the distance between adjacent laser beams and the overlapping rate of the combined laser were theoretically analyzed, respectively. The structural model of the beam combiner was built using Code V software, and the spot energy distribution of the combined laser was simulated using TracePro software. Based on the above work, a 10 kW 18×1 incoherent spatial laser combiner of outputting a rectangular spot was developed. Within the combined length of 200 mm, the combined laser beam had a single rectangular spot shape. A beam combining power of 10.249 kW was achieved with a focal spot diameter of 31 mm×11 mm, a center wavelength of 972.34 nm and a linewidth of 2.27 nm.<br/></div> Copyright ©2022 Infrared and Laser Engineering. All rights reserved.
Number of references:11
Main heading:Laser beams
Controlled terms:Heat treatment - Semiconductor lasers - Surface treatment
Uncontrolled terms:10 kw combined laser - Beam combining - Fiber-transmitted - Flexible processing - High-power lasers - High-speed processing - Incoherent spatial beam combining - Laser surface heat treatments - Rectangular spot - Spatial beams
Classification code:537.1 Heat Treatment Processes - 744.4.1 Semiconductor Lasers - 744.8 Laser Beam Interactions
Numerical data indexing:Power 1.00E+04W, Power 1.0249E+04W, Size 1.10E-02m, Size 2.00E-01m, Size 2.27E-09m, Size 3.10E-02m, Size 9.7234E-07m, Size 9.72E-07m
DOI:10.3788/IRLA20210268
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 202>
Accession number:20221511946742
Title:Research on Precision Positioning Technology of High Dynamic Target Based on Motion Platform
Authors:Xie, Meilin (1, 2); Cao, Yu (1, 2, 3); Lian, Xuezheng (1, 3); Huang, Wei (1, 3); Hao, Wei (1, 3); Feng, Xubing (1, 3); Wang, Fan (1, 3); Liu, Peng (1, 2, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China
Source title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Abbreviated source title:IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC
Part number:1 of 1
Issue title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Issue date:2022
Publication year:2022
Pages:466-473
Language:English
ISBN-13:9781665431859
Document type:Conference article (CA)
Conference name:6th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Chongqing, China
Conference code:177924
Sponsor:Chengdu Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The research on the high precision target measurement method and its key technology based on the motion platform can provide a new measurement system and a new mode of high precision, full function, quick response, small and light, free and flexible, close observation, high efficiency, and strong generality for photoelectric measurement field. According to different usage requirements, this article focuses on the real-time positioning requirements of the target based on the motion platform, and analyzes principle and process in detail of these four real-time high dynamic target positioning methods: single station angle measurement and distance measurement positioning method, the single-station settlement solution based on the collinear equation, the high-precision positioning solution with cooperative identification, the double - machine intersection measurement solution. Then the sources of error and methods to improve accuracy are analyzed [1]-[3]. The measurement mechanism based on motion platform in this paper can be networked with the existing range measurement system to achieve target tracking and measurement in a full range, which is conducive to enhancing the comprehensive test capability of the range and can be widely used in missile weapon system and naval navigation system and other range tests.<br/></div> © 2022 IEEE.
Number of references:6
Main heading:Target tracking
Controlled terms:Navigation systems
Uncontrolled terms:Dynamic target - High dynamic - High-precision - Key technologies - Measurement methods - Motion platforms - Positioning methods - Precision measurement - Precision positioning technologies - Target positioning
DOI:10.1109/ITOEC53115.2022.9734683
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 203>
Accession number:20221511946633
Title:Research on optimal control strategy for velocity stability of space two-dimensional tracking turntable
Authors:Xie, Meilin (1, 3); DIng, Lu (1, 3); Cao, Yu (1, 2, 3); Lian, Xuezheng (1, 3); Liu, Peng (1, 2, 3); Hao, Wei (1, 3); Huang, Wei (1, 3); Liu, Kai (1, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100190, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Ding, Lu
Source title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Abbreviated source title:IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC
Part number:1 of 1
Issue title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Issue date:2022
Publication year:2022
Pages:2011-2016
Language:English
ISBN-13:9781665431859
Document type:Conference article (CA)
Conference name:6th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Chongqing, China
Conference code:177924
Sponsor:Chengdu Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Focusing on the high-definition dynamic imaging requirements of space targets, based on the space two-dimensional turntable equipped with optical equipment, aiming at the image blur caused by speed fluctuation in a single exposure time, this paper focuses on the action mechanism of cable winding torque nonlinearity, torque fluctuation in brushless DC motor control, precision loss caused by speed measurement feedback error, so as to break through the optimal control strategy of turntable speed stationarity under large rotation range and strong coupling torque disturbance [1-3]. The problems are solved by the systematic strategies, such as cable bundle management, precision machining and assembly, high-precision speed feedback, torque compensation in commutation section of Brushless DC motor, target motion trajectory fitting and prediction method. Finally, the simulation realizes azimuth axis speed stability as 0.002°/s(σ) and pitch axis speed stability as 0.0016°/s(σ)[4]. The technology can be applied to the control field with high speed stability of optoelectric turntable or other moving mechanisms[5].<br/></div> © 2022 IEEE.
Number of references:5
Main heading:Phonographs
Controlled terms:Electric machine control - Errors - Torque - Brushless DC motors - Speed - Stability - Feedback - Optimal control systems - Dynamics - Cables
Uncontrolled terms:Brushless DC-motors - Dynamic imaging - High definition - High dynamic - Optimal control strategy - Optimal controls - Space - Speed stability - Strong-coupling - Two-dimensional
Classification code:705.3.2 DC Motors - 731.1 Control Systems - 731.2 Control System Applications - 752.3.1 Sound Reproduction Equipment - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1109/ITOEC53115.2022.9734523
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 204>
Accession number:20220911734758
Title:Modeling the modulation transfer function measurement system of large aperture space cameras
Authors:Liu, Shangkuo (1, 2); Wang, Zhengfeng (1); Cao, Kun (1); Wang, Tao (1); Zhou, Yan (1); Zhao, Jianke (1); Yao, Baoli (1)
Author affiliation:(1) Chinese Academy of Science, Xi'An Institute of Optics and Precision Mechanics, No.17 Xinxi Road, Xi'an; 710119, China; (2) University of Chinese Academy of Science, No.19(A) Yuquan Road, Beijing; 100049, China
Corresponding author:Liu, Shangkuo(liushangkuo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:1216639
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Large aperture space cameras are widely used in high-resolution remote sensing, ultra-weak space targets detection, high-precision astronomical observation, etc. Modulation transfer function (MTF) can directly reflect the information transmission ability of a space camera. Usually, the image quality of a camera is evaluated by measuring its MTF. The MTF of a space camera needs to be measured during alignment of the optical system and electronic system, preset of the vacuum focus position, mechanical experiment, thermal experiment, etc. This paper suggests a method to model the imaging chain of large aperture space camera MTF measurement systems. The model comprehensively considers the factors of the aberration of the collimator, air turbulence, temperature variation, gravity, and environmental vibration. We calibrate the aberration of the collimator, air turbulence, temperature variation, and gravity induced error by measuring the corresponding wavefront error with a 4D laser interferometer. A star point target is placed in the focus position of the collimator to calibrate the environmental vibration through extracting the centroids of the point target images captured by the space camera. The impacts of the previous factors on the MTF measurement results of the space camera are obtained with the proposed model and the corresponding calibration data. The proposed method can evaluate the impacts of different factors on the MTF measurement results and can guide the measurement of large aperture space camera MTF.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Optical transfer function
Controlled terms:Quality control - Interferometers - Optical remote sensing - Optical systems - Optical signal processing - Cameras - Modulation - Turbulence - Laser interferometry
Uncontrolled terms:Air turbulence - Environmental vibrations - Focus positions - High resolution remote sensing - Large aperture - Measurement system - Modulation transfer function measurements - Point targets - Space cameras - Temperature variation
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 743.2 Holographic Applications - 744.9 Laser Applications - 913.3 Quality Assurance and Control - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.1117/12.2616315
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 205>
Accession number:20224513074627
Title:Large Relative Aperture Optical System Design for All Day Star Sensor
Title of translation:大相对孔径全天时星敏感器光学系统
Authors:Zhang, Kaisheng (1, 2); Su, Xiuqin (1); Ye, Zhilong (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Shanghai Aerospace Control Technology Research Institute, Shanghai; 201109, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1111003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Star sensor is a high-precision space attitude measurement instrument with high precision， good autonomy and independent existence of other systems. It takes the starry sky as the working background and stars as the benchmark to obtain the attitude information of the spacecraft by detecting stars in different positions in space. Therefore， its accuracy is the key factor affecting the overall performance of the whole system. The all day star sensor is a star sensor that can still detect stars under the strong background in the daytime and has the anti-interference ability to the strong sky background. As the most important part of the optical system， its imaging quality is very important to improve the star detection ability of the star sensor. However， with the development of aerospace technology， space science has higher and higher requirements for the attitude accuracy of spacecraft. Therefore， in order to meet the needs of all-time high-precision detection， the lens of the star sensor optical system must adopt a large relative aperture to improve the star detection ability. In order to realize the all-time high-precision detection of class 3 stars by star sensor in J-band， this paper adopts the method of passive thermal difference design， carries out matching optimization according to the thermal difference performance difference between the optical system and structural materials， and then realizes lens thermal difference elimination. An all-time star sensor optical system with a large relative aperture is designed and completed. Firstly， the irradiance and signal-to-noise ratio of class 3 stars in the J-band are analyzed to determine the main parameters of the optical system， in which the focal length is 84 mm， the F number is 1.4， and the working spectrum range is 1.1 ~ 1.4 μm. The field angle is 8.4°. Secondly， considering that the optical system of the star sensor has the characteristics of a large relative aperture， long focal length and the influence of optical system distortion on the accuracy of star point extraction， the distortion free telephoto objective is selected as the initial structure of the optical system for optimization. In the process of optical system design， common optical materials and lens barrel materials are selected. By changing the shape and thickness of each lens， the focal power and air gap between each lens are reasonably matched， so as to realize the passive compensation non-heating design. After the optimized design， the dispersion spot size of the optical system is better than 30 when the defocus is 0.02 mm under the conditions of high and low temperature （-40 ℃~ +60 ℃） and vacuum μm. The color distortion is less than 0.018 mm， and the design results meet the design requirements. The inner surface of the star sensor is blackened， the light shield is designed with non-equidistant layout， and the surface is blackened with an SB-3A domestic extinction paint with high solar absorption， which can effectively reduce the weight under the condition of ensuring the effect. The inner baffle ring of the light shield adopts a 16 ° oblique angle， which can ensure good stray light suppression ability. The stray light of the optical mechanical system is simulated and analyzed by using TracePro software. The analysis results show that the stray light generated by the target in the field of view is 3×10<sup>-5</sup> of the intensity of the target， the stray light intensity outside the field of view decreases rapidly from the order of 10<sup>-2</sup>， and the stray light intensity outside 18° is less than 10<sup>-4</sup> of the strong light outside the field of view. Finally， the actual ground star observation test is carried out on the principle prototype. Through the star photos and three-dimensional energy diagram taken by the principle prototype， it can be seen intuitively that the signal intensity of the class 3 star target is much greater than the background intensity. After subsequent image processing， a clearer star observation effect can be obtained. Through theoretical analysis and design and practical observation experiments， it is verified that the optical system designed in this paper can meet the requirements of all-time high-precision detection of class 3 stars in J-band， which also shows the rationality of the design of the optical system.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:11
Main heading:Optical systems
Controlled terms:Lenses - Signal to noise ratio - Stars
Uncontrolled terms:All day - Athermalization - Field of views - High precision detections - High-precision - Large relative aperture - Optical system designs - Performance - Star sensors - Thermal differences
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems
Numerical data indexing:Electric current -3.00E+00A, Size 1.10E-06m to 1.40E-06m, Size 1.80E-05m, Size 2.00E-05m, Size 8.40E-02m
DOI:10.3788/gzxb20225111.1111003
Funding details: Number: GQRC-19-19, Acronym: -, Sponsor: -;
Funding text:Chinese Academy of Sciences Strategic High-Tech Innovation Fund Project （No. GQRC-19-19）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 206>
Accession number:20221611967374
Title:Precision manufacturing of metal mirrors based on additive manufacturing
Authors:Chen, Wencong (1, 2); Sun, Lijun (1, 3); Li, Siyuan (1, 2); Wu, Junqiang (1); Zhang, Zhaohui (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Mechatronical Engineering, Beijing Institute of Technology, Beijing; 100081, China
Corresponding authors:Sun, Lijun(sunlijun2008cool@126.com); Li, Siyuan(lsy@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:1216985
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to solve the problems of long manufacturing cycle and high processing cost of mirrors in reflective optical systems of space cameras, a method for manufacturing metal mirrors based on additive manufacturing process is proposed.This paper designs an open honeycomb structure on the mirror backplane,mirror blank is prepared by additive manufacturing technology.Preliminary improvement of surface quality with rough machining and diamond turning.Then, a high-precision mirror surface is obtained through surface modification and secondary diamond turning.The diameter of the prepared mirror is 110mm, mass reduction rate of 70% and surface shape accuracy is better than ?/15 RMS(? =632.8nm).The results show that the metal mirror prepared by this process can meet the requirements of high-precision reflective optical systems.The research work in this article can provide technical reference for the application of additive manufacturing technology in the field of optics.It has important reference and guiding significance for the research and application of related fields.<br/></div> © 2022 SPIE
Number of references:9
Main heading:Mirrors
Controlled terms:3D printers - Additives - Honeycomb structures - Industrial research - Metals - Optical systems - Optical testing - Turning
Uncontrolled terms:Additive manufacturing technology - Diamond turning - High-precision - Manufacturing cycle - Metal mirror - Precision manufacturing - Processing costs - Reflective optical system - Space cameras - Surface-modification
Classification code:408.2 Structural Members and Shapes - 604.2 Machining Operations - 741.3 Optical Devices and Systems - 745.1.1 Printing Equipment - 803 Chemical Agents and Basic Industrial Chemicals - 901.3 Engineering Research - 912.1 Industrial Engineering
Numerical data indexing:Percentage 7.00E+01%, Size 1.10E-01m, Size 6.328E-07m
DOI:10.1117/12.2625102
Funding details: Number: LSIT201905N, Acronym: -, Sponsor: -;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The authors gratefully acknowledge Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT201905N) and the Youth Innovation Promotion Association XIOPM-CAS.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 207>
Accession number:20222512240988
Title:Ultra-fast detail enhancement for a short-wave infrared image
Authors:Chen, Yaohong (1); Zhang, Hui (1, 2); Zhao, Zehao (1, 2); Wang, Zhen (1); Wang, Hao (1); Kwan, Chiman (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Signal Processing Inc., Rockville; MD; 20850, United States
Corresponding author:Kwan, Chiman(chiman.kwan@signalpro.net)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:17
Issue date:June 10, 2022
Publication year:2022
Pages:5112-5120
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Image detail enhancement is critical to the performance of short-wave infrared (SWIR) imaging systems, especially to the long-range systems.However, the existing high-performance infrared (IR) image enhancement methods typically have difficulty in meeting the requirements of the imaging system with high resolution and high frame rate. In this paper,we propose an ultra-fast and simple SWIR image detail enhancement method based on the difference ofGaussian (DoG) filter and plateau equalization.Our method consists of efficient edge detail information extraction and histogram equalization. The experimental results demonstrated that the proposed method achieves outstanding enhancement performance with a frame rate around 50 fps for 1280×1024SWIRimages.<br/></div> © 2022 Optica Publishing Group.
Number of references:21
Main heading:Infrared radiation
Controlled terms:Equalizers - Image enhancement - Image resolution - Imaging systems - Infrared imaging
Uncontrolled terms:Detail enhancement - High frame rate - High resolution - Image details - Infrared image enhancement - Infrared imaging systems - Long range systems - Performance - Short wave infrared - Ultra-fast
Classification code:713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 741.1 Light/Optics - 746 Imaging Techniques
DOI:10.1364/AO.455947
Funding details: Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (51905529).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 208>
Accession number:20224212969991
Title:Laser wireless power transfer and thermal regulation method driven by transient laser grating (Open Access)
Authors:Yao, Dong (1, 2); Gao, Bo (3); Qiang, Hongfu (1); Wang, Xueren (1); Wen, Keyao (2); Wang, Di (2)
Author affiliation:(1) Xi'An Research Institute of Hi-Tech, Hong Qing Town, Xi'an; 710025, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Shanghai Academy of Spaceflight Technology, Shanghai; 201109, China
Corresponding author:Wang, Di(wangdi@opt.ac.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:12
Issue:10
Issue date:October 1, 2022
Publication year:2022
Article number:105001
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Wireless power transfer (WPT) technology uses non-conductive-wire methods to realize power transmission from the power-supply side to the load side, which is an advantageous energy supply method in long-distance, non-contact scenarios. Based on the photovoltaic (PV) effect, traditional laser WPT (LWPT) has the advantage of high transmission power. However, the cooling requirements of PV modules introduce additional structural composition and operating energy. In this paper, an LWPT (BeE-LWPT) technology based on the Seebeck effect is proposed, and a brand-new energy conversion mode is designed. Aiming at the limited hot area of the thermoelectric element periodically heated using the expanded beam laser, the improvement effect of the transient laser grating thermal regulation mechanism on BeE-LWPT is studied. Multiphysics simulations of the temperature response of the hot end of the copper plate modulated by the laser beam spot are carried out with commercial finite-element software. Compared with the traditional beam expansion method for temperature control, the proposed modulation method based on the transient laser grating has a more stable temperature response and a more uniform heating area, which means better thermal regulation effect.<br/></div> © 2022 Author(s).
Number of references:29
Main heading:Energy transfer
Controlled terms:Laser beams - Photovoltaic effects - Solar panels
Uncontrolled terms:Conductive wires - Energy supplies - Non-contact - Power supply - Power-transmission - Supply sides - Technology use - Temperature response - Thermal regulation - Transfer technologies
Classification code:702.3 Solar Cells - 744.8 Laser Beam Interactions
DOI:10.1063/5.0106968
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 209>
Accession number:20230413454245
Title:On-chip generation and telecom-compatible processing of complex photonic systems in time and frequency
Authors:Sciara, Stefania (1); Yu, Hao (1, 2); Chemnitz, Mario (1); Fischer, Bennet (1); Roztocki, Piotr (1); Crockett, Benjamin (1); Reimer, Christian (1); Caspani, Lucia (3); Kues, Michael (1, 4); Munro, William J. (5); Chu, Sai T. (6); Little, Brent E. (7); Moss, David J. (8); Wang, Zhiming (2); Azaña, Jose (1); Morandotti, Roberto (1, 2)
Author affiliation:(1) Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (2) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Sichuan, Chengdu; 610054, China; (3) Technology Innovation Centre, University of Strathclyde, 99 George St, Glasgow; G11RD, United Kingdom; (4) Hannover Centre for Optical Technologies, Leibniz University, Nienburger Str. 17, Hannover; 30167, Germany; (5) NTT Basic Research Laboratories, Morinosato Wakamiya, Kanagawa, Atsugi-shi, Japan; (6) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (7) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave, Shaanxi, Xi'an; 710119, China; (8) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:Frontiers in Optics, FiO 2022
Issue date:2022
Publication year:2022
Article number:FW1B.1
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:Frontiers in Optics, FiO 2022
Conference date:October 17, 2022 - October 20, 2022
Conference location:Rochester, NY, United states
Conference code:185766
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We exploit standard silicon-based chips and fiber telecommunications components to generate and process complex entangled photon states in the discrete time and frequency domains (two-level time-entangled photons, d-level frequency-entangled photon pairs, and three-level cluster states).<br/></div> © 2022 The Author (s)
Number of references:13
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 210>
Accession number:20220311466374
Title:Infrared and visible image fusion based on QNSCT and Guided Filter
Authors:Yang, Chenxuan (1); He, Yunan (1); Sun, Ce (2); Jiang, Sheng (1); Li, Ye (1); Zhao, Peng (1)
Author affiliation:(1) Changchun University of Science and Technology, School of Physics, Electronic Science and Technology, 7089 Satellite Road, Changchun; 130022, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Ye(liyecust@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:253
Issue date:March 2022
Publication year:2022
Article number:168592
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Image fusion is the process of fusing multiple images of the same scene to obtain a more informative image for human eye perception. In this paper, a new fusion framework based on Quaternion Non-Subsampled Contourlet Transform (QNSCT) and Guided Filter detail enhancement is designed to address the problems of inconspicuous infrared targets and poor background texture in Infrared and visible image fusion. The proposed method uses the quaternion wavelet transform for the first time instead of the traditional Non-Subsampled Pyramid Filter Bank structure in the Non-Subsampled Contourlet Transform (NSCT). The flexible multi-resolution of quaternion wavelet and the multi-directionality of NSCT are fully utilized to refine the multi-scale decomposition scheme. On the other hand, the coefficient matrix obtained from the proposed QNSCT algorithm is fused using a weight refinement algorithm based on the guided filter. The fusion scheme is divided into four steps. First, the Infrared and visible images are decomposed into multi-directional and multiscale coefficient matrices using QNSCT. The experimental results show that the proposed algorithm not only extracts important visual information from the source image, but also preserves the texture information in the scene better. Meanwhile, the scheme outperforms state-of-the-art methods in both subjective and objective evaluations.<br/></div> © 2022 Elsevier GmbH
Number of references:34
Main heading:Contourlet transform
Controlled terms:Image enhancement - Image fusion - Wavelet decomposition - Image texture - Textures
Uncontrolled terms:Coefficient matrix - Contourlet transform - Detail enhancement - Guided filters - Human eye - Infrared and visible image - Multiple image - Multiscale - Non-subsampled contourlet - Quaternion non-subsampled contourlet transform
Classification code:723.2 Data Processing and Image Processing - 921.3 Mathematical Transformations
DOI:10.1016/j.ijleo.2022.168592
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 211>
Accession number:20224613118013
Title:Design of high precision and compact focusing mechanism for aerial photoelectric remote sensor
Title of translation:航空光电遥感器高精密紧凑型调焦机构的设计
Authors:Zhang, Hongwei (1, 2, 3); Chen, Weining (3); Qu, Rui (3); Ding, Yalin (1); Wu, Li (4)
Author affiliation:(1) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Xi'an Photo Optoelectronic Technology Co., Ltd, Xi'an; 710117, China
Corresponding author:Qu, Rui
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:10
Issue date:October 2022
Publication year:2022
Article number:20211122
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Aiming at the defocusing problem of aerial photoelectric remote sensors in different working environments, a moving lens group is used to adjust the focus to ensure its imaging quality. The focusing mechanism adopts the anti-backlash screw nut pair as the transmission mechanism, adopts 6 precision bearings and elastic preload components as guide mechanism and adopts a pair of eddy current sensors and a diamond-shaped detected part as the displacement sensor to ensure the focusing accuracy to the greatest extent under the limited envelope size. The precision analysis of the focusing mechanism was carried out. And a test platform was built to carry out the transmission positioning accuracy experiment and the shaking accuracy experiment. The experimental results show that the transmission positioning accuracy of the focusing mechanism is within ±6 μm, and the shaking accuracy is within ±4″, which meets the design requirements of focusing accuracy proposed by the optical system.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:15
Main heading:Antennas
Controlled terms:Focusing - Optical remote sensing - Optical systems - Photoelectricity - Screws
Uncontrolled terms:Accuracy experiment - Aerial photoelectric remote sensor - Anti-backlash screw nut pair - Antibacklash - Eddy current sensors - Focusing mechanisms - High-precision - Photoelectrics - Positioning accuracy - Remote sensors
Classification code:605 Small Tools and Hardware - 701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 6.00E-06m
DOI:10.3788/IRLA20211122
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 212>
Accession number:20224513074685
Title:Research on Coupling Efficiency Based on Fiber Optic Rotary Joints
Title of translation:基于光纤旋转连接器的光纤耦合效率研究
Authors:Song, Wei (1, 2, 3); Xie, Youjin (1, 2); Li, Zhiguo (1, 2); Hao, Wei (1, 2); Yan, Peipei (1, 2); Li, Xin (1, 2); Sun, Chuandong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (3) University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:Li, Zhiguo(lzg@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1106005
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">As an important part of modern communication system， satellite communication undertakes important tasks such as communication， earth observation， navigation and positioning in military and civil fields. The traditional spaceborne optoelectronic load realizes the data signal and power transmission between the relative rotating bodies through the slip rings. With the continuous development of optical fiber technology and related components， laser communication with optical fiber as the transmission medium has gradually replaced the traditional signal transmission with wires. The fiber optic rotary joints have the characteristics of a wide communication frequency band， strong anti-electromagnetic interference ability， strong confidentiality ability， fast transmission rate， low loss， etc. Its performance largely determines the service life of the satellite. Low loss and high reliability are important indicators of single-channel fiber optic rotary joints. This paper takes the single-channel fiber optic rotary joints as the research object. In order to achieve its low loss and high reliability goals， it is necessary to explore the factors affecting the insertion loss. The gap between the single-mode fiber and the gradient-index lens and the position error between the two gradient-index lens collimators are all important factors that affect the insertion loss of the fiber optic rotary connector. The Gaussian beam coupling has attracted the attention of universities and research institutions from all over the world. But the previous analysis ignored the influence of the position error between the fiber and the gradient-index lens on the coupling efficiency. There is no corresponding compensation method for the above-mentioned errors， which is crucial for improving performance parameters and reducing the difficulty of processing and assembly. This paper takes the single-channel fiber optic rotary joints as the research object. In order to achieve the goals of low loss and high reliability， it is necessary to explore the factors affecting the insertion loss. The fiber optic rotary connector studied in this paper uses two gradient-index lens collimators as the main optics. Theoretically， the propagation model of Gaussian beam in the construction of gradient-index lens is established， and the optical characterization parameters of the gradient-index lens are obtained by mathematical analysis method of light transmission matrix. In order to describe the propagation of the Gaussian beam in the gradient-index lens， the （x， y， z） and （x'， y'， z'） coordinate systems are established， and the electric field vector equations are established for the lenses at the receiving end and the transmitting end. Based on this equation， the influence of lateral offsets on the coupling efficiency of the system is discussed. Using the geometrical optics analysis method， the energy distribution equation under the separation misalignment is established， and the influence of the separation misalignment on the coupling efficiency of the system is analyzed. This paper design the single-channel fiber optic rotary joints with low loss as the key parameter by ZEMAX， and the optical model of the single-channel fiber optic rotary joints is established， and the optical parameters of the gradient-index lens are preliminarily determined. For the convenience of processing and assembly， the two gradient-index lenses are designed with the same parameters. First， without changing the working distance， set the distances to 0， 0.05 mm， 0.10 mm， 0.15 mm， 0.20 mm， and 0.25 mm between the optical fiber at the transmitting end and the gradient-index lens. In order to obtain the insertion loss at different positions， the value of the fiber at the receiving end and the gradient-index lens is changed. It can be seen from the analysis that the same insertion loss as the initial value can be obtained by adjusting the position of the optical fiber. This method can reduce the influence of the error between the optical fiber and the gradient-index lens. Secondly， by changing the lateral offsets and separation misalignment of the two gradient-index lenses， the effects of lateral offsets and separation misalignment on the insertion loss of the system are obtained. It should be noted that due to the particularity of the gradient-index lens， the lateral offsets cannot be so large that the Gaussian beam cannot be coupled into the fiber. The axial distance is controlled within 0~14 mm， and the radial distance is controlled within 0~0.25 mm. It can be seen from the simulation that the lateral offsets have a great influence on the insertion loss of the system， and it is necessary to strictly ensure the accuracy in processing and assembly. In view of the above errors， the insertion loss is reduced to 0.2 dB by the displacement method， which provides a reference for the optimal design of the single-channel fiber optic rotary joints. For the separation misalignment and lateral offsets between two gradient-index lenses， a beam steering technology based on wedge prism and flat glass is proposed. This method mainly uses two wedge prisms to achieve beam steering， the flat glass adjusts the transmission optical axis and the receiving optical axis to be on the same axis as possible. The insertion loss of systems can be reduced to 0.7 dB by beam steering technology， which greatly reduces the influence of errors. The difficulty of processing and assembly is reduced， and the reliability of the system can be improved. Finally， a test system for the insertion loss of a single-channel fiber optic rotary joints was built， and the position of the optical fiber and the gradient-index lens was adjusted with a high precision fiber alignment stage， and observed through a binocular microscope. By fitting the experimental data with the simulation data， the accuracy of the system design and simulation analysis is verified.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:17
Main heading:Gaussian beams
Controlled terms:Efficiency - Electric fields - Electromagnetic pulse - Fiber optics - Gaussian distribution - Insertion losses - Lenses - Light - Light transmission - Optical fiber communication - Optical fiber coupling - Reliability - Satellite communication systems - Satellites - Single mode fibers
Uncontrolled terms:Coupling efficiency - Fiber optic rotary joints - Gradient-index lens - High reliability - Light transmission model - Low-high - Low-loss - Optical fiber transmission systems - Single channels - Transmission model
Classification code:655.2 Satellites - 655.2.1 Communication Satellites - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 913.1 Production Engineering - 922.1 Probability Theory - 922.2 Mathematical Statistics
Numerical data indexing:Size 0.00E00m to 1.40E-02m, Size 0.00E00m to 2.50E-04m, Size 1.00E-04m, Size 1.50E-04m, Size 2.00E-04m, Size 2.50E-04m, Size 5.00E-05m, Decibel 2.00E-01dB, Decibel 7.00E-01dB
DOI:10.3788/gzxb20225111.1106005
Funding details: Number: 2018441, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:Youth Innovation Promotion Association CAS（No.2018441）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 213>
Accession number:20222612284588
Title:Research on Precise Synchronous High Voltage Pulse Gating System of Framing Camera
Authors:Yang, ZhiKun (1); Gou, YongSheng (1); Tian, JinShou (1); Zhao, Wei (1); Yang, Yang (1); Feng, PengHui (1); Wang, Xv (1); Wei, ShiDuo (1, 2); Xv, HanTao (1, 2); Liu, BaiYu (1); Chen, Zhen (1)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Liu, BaiYu(liubaiyu@opt.ac.cn); Chen, Zhen(chenzhen@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12244
Part number:1 of 1
Issue title:2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control, METMS 2022
Issue date:2022
Publication year:2022
Article number:122440V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510654778
Document type:Conference article (CA)
Conference name:2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control, METMS 2022
Conference date:January 7, 2022 - January 9, 2022
Conference location:Guilin, China
Conference code:179707
Sponsor:Academic Exchange Information Center (AEIC)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a special high-voltage pulse synchronization system is designed for the framing camera used in the Z-pinch experiment.The system adopts a system architecture that combines a programmable delay module and a high-voltage pulse generation module. The delay module uses a digital delay chip to achieve picosecond delay. The high-voltage pulse generation module uses a Marx pulse circuit combined in series and parallel to generate high-voltage narrow pulse.Technical parameters: pulse amplitude 2.5kv, pulse width 4.03ns, delay range 2s, delay accuracy 500Ps, pulse jitter less than 150ps. It avoids the line loss and waveform distortion caused by the long transmission line of the traditional delay line method, improves the system integration, reduces the volume and weight of the equipment, and is more convenient to deploy and use.<br/></div> © 2022 SPIE
Number of references:8
Main heading:Timing circuits
Controlled terms:Cameras - Electric potential - Pinch effect
Uncontrolled terms:Digital delay generator - Digital delays - Framing Camera - Gating system - High voltage pulse - High voltage pulse generation - Pulse synchronization - Synchronization systems - Timing control - Z pinch
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 713.4 Pulse Circuits - 742.2 Photographic Equipment
Numerical data indexing:Time 1.50E-10s, Time 2.00E+00s, Time 4.03E-09s
DOI:10.1117/12.2635206
Funding details: Number: GJJSTD20220006, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was financially supported by the Scientific Instrument Developing Project of the Chinese Academy of Sciences, Grant No. GJJSTD20220006
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 214>
Accession number:20221511947488
Title:Study on Multispectral Polarization Characteristics of Biological Tissues
Title of translation:生物组织多光谱偏振特性研究
Authors:Qiao, Wen-Long (1, 2); Zhou, Liang (1); Liu, Zhao-Hui (1); Gong, Yong-Hui (3); Jiang, Le (1); Lü, Yuan-Yuan (1, 2); Zhao, He-Tong (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Unit 63636 of Jiuquan Satellite Launch Center, Jiuquan; 732750, China
Corresponding author:Zhou, Liang(zhouliang@opt.ac.cn)
Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi
Volume:42
Issue:4
Issue date:April 2022
Publication year:2022
Pages:1070-1075
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Biological tissues are very complicated with strong scattering characteristics. The light-source of detecting physiological parameters of tissues is critical. Combined with the advantages of polarization imaging, this paper studies the multispectral polarization characteristics of biological tissues. We established uniform monolayer biological tissue samples based on the distribution of different particle sizes and simulated the scattering model with single-particle by combining Rayleigh and Mie scattering theory. Rayleigh theory has good forward and backward scattering symmetry; Mie theory has strong forward scattering characteristics. The two scattering models are closely related to the size parameter, a dimensionless quantity, depending on the incident wavelength and the size of scattered particles. Mie theory is generally used as the research model in biological tissues. We used a Monte Carlo method to simulate the transmission characteristics of polarized light in the tissue model. The wavelength range is 400~1 000 nm. In this paper, we have simulated four typical polarization states, (horizontally polarized light, vertically polarized light, 450 linearly polarized light and right-rotated circularly polarized light). The experiment system used a white LED lamp as a light source. It used filters to obtain different wavelength beams, a color camera was used to record the image of the target, two groups of linear polarizers and right-rotated circular polarizers were used as polarizers and analyzers to test horizontally polarized light, and right-rotated circular polarized light with wavelengths of 450, 525, 550, 590, 610, 650 and 690 nm, respectively, and the target is our palm. Both simulation and experimental results show that with the increase of wavelength, the degree of polarization (DOP) of linearly polarized light after backscattering from skin tissue shows an overall upward trend, while that of circularly polarized light is on the decline. However, the overall DOP of circularly polarized light is higher than that of linearly polarized light, which indicates that circularly polarized light has better polarization retention than linearly polarized light in biological tissues and is more suitable for detecting physiological information. Our study has confirmed the multispectral characteristics of circularly polarized light and linearly polarized light transmitted in tissues, which provided theoretical support for obtaining multispectral polarization physiological parameters.<br/></div> © 2022, Peking University Press. All right reserved.
Number of references:12
Main heading:Light sources
Controlled terms:Tissue - Histology - Light polarization - Light scattering - Physiological models - Light transmission - Physiology - Forward scattering - Optical instruments - Monte Carlo methods - Incident light
Uncontrolled terms:Biological tissues - Circularly polarized light - Degree of polarization - Linearly polarized light - Multi-spectral - Multispectral polarization - Physiological parameters - Polarization characteristics - Scattering char-acteristics - Scattering model
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 711 Electromagnetic Waves - 741.1 Light/Optics - 922.2 Mathematical Statistics - 941.3 Optical Instruments
Numerical data indexing:Size 0.00E00m, Size 6.50E-07m, Size 6.90E-07m
DOI:10.3964/j.issn.1000-0593(2022)04-1070-06
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 215>
Accession number:20222312194141
Title:Telecom-compatible, on-chip generation and processing of complex photon states in time and frequency
Authors:Chemnitz, Mario (1); Yu, Hao (1, 9); Sciara, Stefania (1); Fischer, Bennet (1); Roztocki, Piotr (1); Crockett, Benjamin (1); Reimer, Christian (1, 2); Caspani, Lucia (3); Kues, Michael (1, 4); Munro, William J. (5); Chu, Sai T. (6); Little, Brent E. (7); Moss, David J. (8); Wang, Zhiming (9); Azana, Jose (1); Morandotti, Roberto (1, 9)
Author affiliation:(1) Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (2) HyperLight Corporation, 501 Massachusetts Avenue, Cambridge; MA; 02139, United States; (3) Technology Innovation Centre, University of Strathclyde, 99 George St, Glasgow; G11RD, United Kingdom; (4) Hannover Centre for Optical Technologie, Leibniz University, Nienburger Str. 17, Hannover; 30167, Germany; (5) Ntt Basic Research Laboratorie, Morinosato Wakamiya Atsugi-shi, Kanagawa, Japan; (6) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave, Xi'an, Shaanxi; 710119, China; (7) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (8) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (9) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Sichuan, Chengdu; 610054, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12004
Part number:1 of 1
Issue title:Integrated Optics: Devices, Materials, and Technologies XXVI
Issue date:2022
Publication year:2022
Article number:1200409
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510648791
Document type:Conference article (CA)
Conference name:Integrated Optics: Devices, Materials, and Technologies XXVI 2022
Conference date:February 20, 2022 - February 24, 2022
Conference location:Virtual, Online
Conference code:179330
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">We review our work on implementing integrated QFC sources based on microring resonators for on-chip generation of two- and multi-photon time-bin entangled states, d-level frequency-entangled photon pairs, and multipartite d-level cluster states. We also present our recent progress on telecom-compatible, scalable, time-entangled two-photon qubits using on-chip Mach-Zehnder interferometers (MZI) in combination with spiral waveguides. Both approaches are highly cost-effective, efficient, and practical, since we coherently manipulate the time and frequency modes through standard fiber-linked components that are compatible with off-the-shelf telecommunications infrastructures. Our work paves the way for robust sources and processors of complex photon states for future quantum technologies.<br/></div> © 2022 SPIE.
Number of references:18
Main heading:Cost effectiveness
Controlled terms:Mach-Zehnder interferometers - Optical resonators - Photons - Quantum entanglement - Quantum optics - Qubits - Silicon
Uncontrolled terms:Complex photon state - Discrete frequencies - Discrete-time mode - Frequency combs - Frequency modes - Integrated mach-zehnde interferometer - Photon state - Photonic qubit and qudit - Photonic qubits - Quantum frequency comb - Silicon-based - Silicon-based chip - Spiral waveguides - Time and frequencies
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 911.2 Industrial Economics - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 941.3 Optical Instruments
DOI:10.1117/12.2607224
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 216>
Accession number:20211110072662
Title:Semantics-Consistent Representation Learning for Remote Sensing Image-Voice Retrieval (Open Access)
Authors:Ning, Hailong (1, 2, 3); Zhao, Bin (3); Yuan, Yuan (3)
Author affiliation:(1) Shaanxi Key Laboratory of Ocean Optics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Artificial Intelligence, Optics and Electronics (IOPEN), Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Yuan, Yuan(y.yuan1.ieee@qq.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the development of earth observation technology, massive amounts of remote sensing (RS) images are acquired. To find useful information from these images, cross-modal RS image-voice retrieval provides a new insight. This article aims to study the task of RS image-voice retrieval so as to search effective information from massive amounts of RS data. Existing methods for RS image-voice retrieval rely primarily on the pairwise relationship to narrow the heterogeneous semantic gap between images and voices. However, apart from the pairwise relationship included in the data sets, the intramodality and nonpaired intermodality relationships should also be considered simultaneously since the semantic consistency among nonpaired representations plays an important role in the RS image-voice retrieval task. Inspired by this, a semantics-consistent representation learning (SCRL) method is proposed for RS image-voice retrieval. The main novelty is that the proposed method takes the pairwise, intramodality, and nonpaired intermodality relationships into account simultaneously, thereby improving the semantic consistency of the learned representations for the RS image-voice retrieval. The proposed SCRL method consists of two main steps: 1) semantics encoding and 2) SCRL. First, an image encoding network is adopted to extract high-level image features with a transfer learning strategy, and a voice encoding network with dilated convolution is devised to obtain high-level voice features. Second, a consistent representation space is conducted by modeling the three kinds of relationships to narrow the heterogeneous semantic gap and learn semantics-consistent representations across two modalities. Extensive experimental results on three challenging RS image-voice data sets, including Sydney, UCM, and RSICD image-voice data sets, show the effectiveness of the proposed method.<br/></div> © 1980-2012 IEEE.
Number of references:54
Main heading:Semantics
Controlled terms:Space optics - Encoding (symbols) - Learning systems - Signal encoding - Image enhancement - Remote sensing
Uncontrolled terms:Earth Observation Technology - Image encoding - Image features - Inter modalities - Remote sensing images - Representation space - Semantic consistency - Voice retrieval
Classification code:656.1 Space Flight - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.1 Light/Optics
DOI:10.1109/TGRS.2021.3060705
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 217>
Accession number:20223112528981
Title:Design and Preparation of Large Aperture High Reflective Films Composed Entirely of Dielectric Materials for Multi-band Application
Authors:Shi, Yun-Yun (1); Xu, Jun-Qi (1); Liu, Zheng (2); Zhang, Kai-Feng (3); Su, Jun-Hong (1); Yuan, Song-Song (1); Liu, Qi (1)
Author affiliation:(1) Shaanxi Province Thin Films Technology and Optical Test Open Key Laboratory, Xi'an Technological University, Xi'an; 710021, China; (2) Advanced Optical Manufacturing Technology Joint Laboratory, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (3) Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou; 730000, China
Corresponding author:Xu, Jun-Qi
Source title:Surface Technology
Abbreviated source title:Surf. Technol.
Volume:51
Issue:4
Issue date:2022
Publication year:2022
Pages:335-341
Article number:1001-3660(2022)04-0335-07
Language:Chinese
E-ISSN:10013660
Document type:Journal article (JA)
Publisher:Chongqing Wujiu Periodicals Press
Abstract:<div data-language="eng" data-ev-field="abstract">This paper aims to select TiO<inf>2</inf> and SiO<inf>2</inf> high and low refractive index materials, design and prepare 500~650 nm, 780~830 nm, 1 050~1 080 nm three-band compatible dielectric high reflective films. The spectral properties, stress characteristics and laser damage resistance of high reflective films composed entirely of dielectric materials for multi-band application are studied, and the large aperture film samples with good stress state are obtained. The process parameters of monolayer films were studied, with the monitoring wavelength 560 nm, based on the electric field intensity distribution, and film structure was optimized to be G/(HL)<sup>8</sup>H(2L)<sup>4</sup> (1.4H1.4L)<sup>8</sup>H2L(1.9H1.9L)<sup>8</sup>1.9 H/A. Low refractive index layers were added between different film stacks to suppress the nominal problem, and the reflectance spectral was smoothed, wide-band large-size multilayer high reflective film with good performance was successfully prepared on a large aperture substrate of ф220 mm by ion beam assisted electron beam evaporation technology. Its reflectance spectral was in the visible light range of 500~650 nm, with the average reflectivity of 99.5%, the peak reflectivity of 99.9%, the minimum reflectivity was 95.1%; within the scope of 780~830 nm, the peak reflectivity was 99.9%, and the average reflectivity was 99.8%, and the minimum reflectivity was 99.6%; in the 1 050~1 080 nm band, its average reflectivity could reach 99.8%, and the peak reflectivity reached 99.9%, and the minimum reflectivity reached 99.7%; reflectance spectral of large aperture film sample at different positions were high consistent. The laser-induced damage threshold of film was 7.1 J/cm<sup>2</sup>, and the residual stress was –293.59 MPa. The film thickness uniformity of large aperture film sample is good, and the film is compact without wrinkle, crack and falling off phenomena, with higher fastness and excellent laser protection performance.<br/></div> © 2022, Chongqing Wujiu Periodicals Press. All rights reserved.
Number of references:25
Main heading:Reflection
Controlled terms:Electric fields - Film preparation - High-k dielectric - Ion beams - Laser damage - Low-k dielectric - Refractive index - Residual stresses - Silica - Thin films - Titanium dioxide
Uncontrolled terms:High-refractive-index materials - Large aperture - Laser induced damage thresholds - Low-refractive-index materials - Materials design - Multi band - Multi band application - Peak reflectivity - Spectral properties - Thin-films
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 804.2 Inorganic Compounds - 932.1 High Energy Physics
Numerical data indexing:Energy 7.10E+00J, Inductance 1.90E+00H, Inductance 8.00E+00H, Percentage 9.51E+01%, Percentage 9.95E+01%, Percentage 9.96E+01%, Percentage 9.97E+01%, Percentage 9.98E+01%, Percentage 9.99E+01%, Pressure 2.9359E+08Pa, Size 5.00E-07m to 6.50E-07m, Size 5.60E-07m, Size 7.80E-07m to 8.30E-07m, Size 8.00E-08m, Volume 2.00E-03m3
DOI:10.16490/j.cnki.issn.1001-3660.2022.04.035
Funding details: Number: 2018KWZ-02, Acronym: -, Sponsor: -;Number: 6142207190407, Acronym: -, Sponsor: -;
Funding text:收稿日期：2021-05-17；修订日期：2021-10-22 Received：2021-05-17；Revised：2021-10-22 基金项目：装备预研重点实验室基金（6142207190407）；陕西省国际科技合作与交流计划资助项目（2018KWZ-02） Fund：Key Laboratory for Equipment Pre-research (6142207190407); International Science and Technology Cooperation and Exchange Plan Project of Shaanxi Province (2018KWZ-02) 作者简介：师云云（1994—），女，硕士研究生，主要研究方向为薄膜技术。 Biography：SHI Yun-yun (1994—), Female, Postgraduate, Research focus: film processing technique. 通讯作者：徐均琪（1973—），男，博士，教授，主要研究方向为薄膜技术。 Corresponding author：XU Jun-qi (1973—), Male, Doctor, Professor, Research focus: film processing technique. 引文格式：师云云, 徐均琪, 刘政, 等. 多波段大口径全介质高反膜的设计与制备[J]. 表面技术, 2022, 51(4): 335-341. SHI Yun-yun, XU Jun-qi, LIU Zheng, et al. Design and Preparation of Large Aperture High Reflective Films Composed Entirely of Dielectric Materials for Multi-band Application[J]. Surface Technology, 2022, 51(4): 335-341.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 218>
Accession number:20221712030731
Title:Design of the scintillator imaging lens for the neutron imaging system at the 100 kJ-level laser facility
Authors:Li, Qiukai (1, 2, 3); Chen, Zhongjing (3); Xu, Tao (3); Yan, Yadong (1); Wang, Feng (3); He, Junhua (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang; 621900, China
Corresponding author:He, Junhua(hjh@opt.ac.cn)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:93
Issue:4
Issue date:April 1, 2022
Publication year:2022
Article number:043303
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Deuterium-tritium neutron yield has reached up to about 1013 at the 100 kJ-level laser facility, which makes measurement of neutron emission images possible with the neutron imaging system. There are two methods to collect neutron images from the scintillator array, optical fiber taper and the lens system. Here, we report a design of the lens system for the neutron imaging system at the 100 kJ-level laser facility. The lens system, which consists of a nine-element collecting lens, with a spatial resolution of 20 μm and a light-collection efficiency of 5.9% has been designed.<br/></div> © 2022 Author(s).
Number of references:18
Main heading:Lenses
Controlled terms:Image resolution - Imaging systems - Scintillation counters - Neutrons - Optical fibers
Uncontrolled terms:Deuterium-tritium - Emission images - Imaging lens - Laser facilities - Lens systems - Measurements of - Neutron image - Neutron imaging systems - Neutron yields - Scintillator arrays
Classification code:741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 944.7 Radiation Measuring Instruments
Numerical data indexing:Energy 1.00E+05J, Percentage 5.90E+00%, Size 2.00E-05m
DOI:10.1063/5.0086782
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 219>
Accession number:20224613110632
Title:Visible-Infrared Person Re-Identification via Partially Interactive Collaboration
Authors:Zheng, Xiangtao (1); Chen, Xiumei (2, 3); Lu, Xiaoqiang (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology Cas, Xi'an; 710119, China; (2) Xidian University, School of Computer Science and Technology, Xi'an; 710071, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Qiyuan Laboratory, Beijing; 100095, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:31
Issue date:2022
Publication year:2022
Pages:6951-6963
Language:English
ISSN:10577149
E-ISSN:19410042
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Visible-infrared person re-identification (VI-ReID) task aims to retrieve the same person between visible and infrared images. VI-ReID is challenging as the images captured by different spectra present large cross-modality discrepancy. Many methods adopt a two-stream network and design additional constraint conditions to extract shared features for different modalities. However, the interaction between the feature extraction processes of different modalities is rarely considered. In this paper, a partially interactive collaboration method is proposed to exploit the complementary information of different modalities to reduce the modality gap for VI-ReID. Specifically, the proposed method is achieved in a partially interactive-shared architecture: collaborative shallow layers and shared deep layers. The collaborative shallow layers consider the interaction between modality-specific features of different modalities, encouraging the feature extraction processes of different modalities constrain each other to enhance feature representations. The shared deep layers further embed the modality-specific features to a common space to endow them the same identity discriminability. To ensure the interactive collaborative learning implement effectively, the conventional loss and collaborative loss are utilized jointly to train the whole network. Extensive experiments on two publicly available VI-ReID datasets verify the superiority of the proposed PIC method. Specifically, the proposed method achieves a rank-1 accuracy of 83.6% and 57.5% on RegDB and SYSU-MM01 datasets, respectively.<br/></div> © 1992-2012 IEEE.
Number of references:50
Main heading:Feature extraction
Controlled terms:Extraction - Infrared devices - Infrared imaging - Job analysis
Uncontrolled terms:Collaboration - Collaborative learning - Cross modality - Extraction process - Features extraction - Federated learning - Partially interactive-shared - Person re identifications - Representation learning - Task analysis
Classification code:746 Imaging Techniques - 802.3 Chemical Operations
Numerical data indexing:Percentage 5.75E+01%, Percentage 8.36E+01%
DOI:10.1109/TIP.2022.3217697
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 220>
Accession number:20224413027527
Title:Research on Factors of Affecting the Strength of Silica Optical Fiber and Process Improvement
Title of translation:石英光纤强度的影响因素研究及工艺改进
Authors:Zhang, Yan (1); Gao, Song (1); Xue, Yaohui (2); Zhang, Zhuo (2); Wang, Xiaozhang (2); Cao, Shanshan (3); Xu, Haitao (3); She, Shengfei (1); Xie, Jin (1); Li, Yizhao (1); Liu, Lutao (1); Guo, Haitao (1); Hou, Chaoqi (1)
Author affiliation:(1) Research Center of Special Optical Fiber and Device, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) China North Industries Group Corporation Norinco Group, Xi'an Modern Control Technology Research Institute, Xi'an; 710119, China; (3) Jiangsu Zhong Tian Technology Co.， Ltd., Jiangsu, Nantong; 226000, China
Corresponding author:Hou, Chaoqi(houchaoqi@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:6
Issue date:June 1, 2022
Publication year:2022
Article number:0606002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">With the continuous development of international communication and industrial testing field，optical fiber cables are often in harsh working environments with high temperature， high humidity and high pressure， and will be used in deep-sea signal transmission， urban communication network construction， petrochemical smelting， national defense and military industries. Its application environment puts forward higher and higher requirements for optical fiber strength. The strength of conventional silica fiber can not meet the requirements of harsh environments， which restricts the further expansion of its market application range. Theoretically， using the bond length and surface energy between fused silica atoms， it can be calculated that the theoretical maximum breaking force of standard single-mode fiber is 203 N， while the average breaking force of commercial single-mode fiber is 47.6 N， which is far less than the theoretical maximum breaking force. The main reason is that during the optical fiber manufacturing process， it can inevitably experience the thermal and cold changes of high-temperature fused silica to accumulate internal stress inside the optical fiber. All will cause micro-cracks on the surface of the fiber， reducing the strength of the fiber. Therefore， suppressing the micro-cracks on the surface of the optical fiber and effectively improving the strength of the silica fiber have become the key exploratory areas by researchers. This article uses the passive single-mode quartz preform provided by Zhongtian Technology Co.， Ltd（diameter 35 mm， core NA 0.14）. The experiment is designed by an online active temperature-controlled annealing furnace to reduce the temperature difference between the surface temperature and room temperature when the fiber is released from the furnace， eliminate the internal stress of the fiber and inhibit the generation of micro-cracks on the surface and inside of the fiber. The newly installed online active temperature control annealing furnace has a length of 600 mm， and the furnace body has built-in three-stage heating wire， which can realize the temperature adjustment of 0~600 ℃ inside the furnace body. Acrylate was used as the coating material， and the fiber was drawled online by UV curing. The fiber cladding diameter was 125±1 μm， the coating diameter was 245±5 μm， and the coating/cladding concentricity error was less than 10.0 μm. The breaking force of the optical fiber is the reference standard to measure the strength of the optical fiber. According to international standard， the average breaking force of optical fiber is tested by universal tensile testing machine. The running speed of the tensile testing machine was 50 mm/min， and 15 samples were selected for each set of tests， and the length of each sample was 1 m. Different preform pretreatment processes，drawing speeds and active temperature control annealing processes are measured in experiment. The surface morphology of preforms and fibers with different treating conditions were characterized by reflective optical microscope （OLYMPUS， BX53M） and Scanning Electron Microscopy（SEM，ZEISS-EVO-18）. The influencing factors of optical fiber breaking force were analyzed and studied. The result shows that average breaking force of the fiber behaves a downward trend with the increasing of drawing speed. Through the analysis of the fracture curve of the optical fiber Weibull function under different process conditions， with the optimization of the process conditions， the tensile force of the optical fiber increases but the sample consistency deteriorates. The micro-cracks on the surface of optical fibers and preforms can be effectively suppressed and average fiber breaking force was increased from 36.69 N without any treatment to 68.28 N， and the breaking force increased by 86%， through flame polishing and gradient cooling treatment on preforms， optimizing the active temperature control annealing process and decreasing the drawing speed. Relevant experimental surfaces carried out flame polishing pretreatment on the preform and optimization of the annealing process during the drawing process， while reducing the fiber drawing speed， which can effectively improve the average breaking force of the fiber. The research has opened up a wider application space for high-strength optical fibers in harsh environments such as oil exploration， submarine optical cable laying， and climate monitoring.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:23
Main heading:Fused silica
Controlled terms:Annealing - Atmospheric temperature - Bond length - Coatings - Optical cables - Single mode fibers - Thermal expansion
Uncontrolled terms:Annealing process - Breaking force - Breaking tension - Breakings - Drawing speed - Fibre strength - Flame polishing - Micro cracks - Optic-fiber - Silica fibers
Classification code:443.1 Atmospheric Properties - 537.1 Heat Treatment Processes - 641.1 Thermodynamics - 717.2 Optical Communication Equipment - 741.1.2 Fiber Optics - 801.4 Physical Chemistry - 812.3 Glass - 813.2 Coating Materials - 931.3 Atomic and Molecular Physics - 951 Materials Science
Numerical data indexing:Force 2.03E+02N, Force 3.669E+01N, Force 4.76E+01N, Force 6.828E+01N, Percentage 8.60E+01%, Size 1.00E-05m, Size 1.00E00m, Size 1.25E-04m, Size 2.45E-04m, Size 3.50E-02m, Size 5.00E-02m, Size 6.00E-01m
DOI:10.3788/gzxb20225106.0606002
Funding details: Number: 62105358, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022GY-098, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;Number: 2022JQ-587, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 62105358）， Natural Science Basic Research Program of Shaanxi （No. 2022JQ-587）， Key Research and Development Program of Shaanxi （No. 2022GY-098）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 221>
Accession number:20211610231609
Title:Disentangled Representation Learning for Cross-Modal Biometric Matching
Authors:Ning, Hailong (1, 2); Zheng, Xiangtao (1, 2); Lu, Xiaoqiang (1); Yuan, Yuan (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Artificial Intelligence, Optics and Electronics (IOPEN), Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Transactions on Multimedia
Abbreviated source title:IEEE Trans Multimedia
Volume:24
Issue date:2022
Publication year:2022
Pages:1763-1774
Language:English
ISSN:15209210
E-ISSN:19410077
CODEN:ITMUF8
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Cross-modal biometric matching (CMBM) aims to determine the corresponding voice from a face, or identify the corresponding face from a voice. Recently, many CMBM methods have been proposed by forcing the distance between two modal features to be narrowed. However, these methods ignore the alignability between the two modal features. Because the feature is extracted under the supervision of identity information from single modal data, it can only reflect the identity information of single modal data. In order to address this problem, a disentangled representation learning method is proposed to disentangle the alignable latent identity factors and nonalignable the modality-dependent factors for CMBM. The proposed method consists of two main steps: 1) feature extraction and 2) disentangled representation learning. Firstly, an image feature extraction network is adopted to obtain face features, and a voice feature extraction network is applied to learn voice features. Secondly, a disentangled latent variable is explored to disentangle the latent identity factors that are shared across the modalities from the modality-dependent factors. The modality-dependent factors are filtered out, while the latent identity factors from the two modalities are enforced to be narrowed to align the same identity information. Then, the disentangled latent identity factors are considered as pure identity information to bridge the two modalities for cross-modal verification, 1:N matching, and retrieval. Note that the proposed method learns the identity information from the input face images and voice segments with only identity label as supervised information. Extensive experiments on the challenging VoxCeleb dataset demonstrate the proposed method outperforms the state-of-the-art methods.<br/></div> © 1999-2012 IEEE.
Number of references:59
Main heading:Face recognition
Controlled terms:Learning systems - Feature extraction - Extraction - Image segmentation - Job analysis - Modal analysis - Biometrics - Information filtering
Uncontrolled terms:Biometric matching - Dependent factors - Identity information - Identity labels - Image feature extractions - Latent variable - Learning methods - State-of-the-art methods
Classification code:461 Bioengineering and Biology - 802.3 Chemical Operations - 903.1 Information Sources and Analysis - 921 Mathematics
DOI:10.1109/TMM.2021.3071243
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 222>
Accession number:20230813622730
Title:Optical Field Imaging Echo Demodulation Ratio Method to Suppress the Image Quality Degradation Caused by Light Intensity Disturbance
Title of translation:光 场 成 像 回 波 解 调 比 法 抑 制 光 强 扰 动 像 质 退 化
Authors:Cheng, Zhiyuan (1, 2); Ji, Zhou (3); Gao, Yansheng (3); Su, Hua (4); Yan, Peipei (1, 2); Xia, Aili (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechnics of CAS, Xi'an; 710119, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:12
Issue date:2022
Publication year:2022
Article number:1211003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Laser optical field imaging system transmits multiple laser beams to scan the target for imaging. When the new optical field imaging theory is applied in practical engineering，the inevitable multi beam intensity jitter effect will cause fluctuation in intensity amplitude. In the subsequent reconstruction of spectrum components based on the spectrum iteration theory，the fluctuation in light intensity amplitude will cause the reconstruction spectrum error，which will lead to degradation of imaging quality in further. Aiming at the problem of image quality degradation of optical field imaging caused by laser beam intensity disturbance，an approximate calculation method based on the demodulation ratio of light field echo signal is proposed in this study. First，the interference light field signals with different frequencies in optical field echo signal are demodulated. The demodulated optical field echo signal is affected by random fluctuations of the beam intensity amplitude. The phase closure coefficient is calculated based on the multi beam phase closure theory and an isospectral sampling array is constructed. Then，according to the principle of isospectral iterative reconstruction，the high-order spectral components can be obtained by iteratively solving the lower order spectral components in turn. In this study，the influence model of the light intensity perturbation factor on reconstructed spectrum component error is established，and the influence mechanism of light intensity perturbation on image quality is revealed. Due to the amplitude fluctuation effect of beam intensity，the disturbance factor of beam intensity fluctuates randomly，which affects the accuracy of spectral signal reconstruction and reduces the imaging quality. In order to eliminate the influence of light intensity disturbance on image quality，the influence of light intensity disturbance factor on reconstructed spectral signal should be suppressed. In the weak turbulence scene，the scale coefficient of the disturbance factor of multi-beam intensity can be approximated by the demodulation component of laser echo signal. The light intensity perturbation factor is calculated by the scale coefficient of demodulation echo signal. The value of laser beam intensity perturbation factor is substituted into the spectrum reconstruction model. Finally，the spectrum of eliminating light intensity disturbance factor is obtained. The target image is obtained by performing an inverse Fourier transform of signal spectrum component，and the image index of target is calculated to evaluate the reconstructed image quality. The demodulation ratio of optical field imaging method is analyzed and verified based on the simulation experiment. The simulation experiment results show that the demodulation ratio method suppresses the light intensity disturbance and improves the reconstruction image quality. The demodulation ratio method can effectively suppress the degradation effect of light intensity disturbance and improve the image quality. The validity of the demodulation ratio method is verified based on the desktop experimental platform. The experimental results show that the image sharpness is significantly improved，and the three image quality evaluation indexes of the reconstructed image Strehl ratio，peak signal-to-noise ratio and structural similarity are all improved，which further proves the effectiveness of the demodulation ratio method. The imaging error correction model of light intensity perturbation factor is proposed and the corresponding demulation ratio solution is proposed in optical field imaging system. This study provides an effective theoretical guidance for the suppression of light intensity perturbation factor and the improvement of image quality in actual optical field imaging. The research shows that the proposed demodulation ratio method can effectively suppress the influence of beam intensity disturbance on image quality，and effectively reduce the requirements of beam intensity stability and multi-beam intensity consistency for optical field imaging，thus reducing the difficulty of optical field imaging engineering. The research can provide technical support for experimental research and application transformation of optical field imaging technology.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:19
Main heading:Demodulation
Controlled terms:Errors - Image enhancement - Image quality - Image reconstruction - Inverse problems - Iterative methods - Laser beams - Optical variables measurement
Uncontrolled terms:Beam intensity - Demodulation signal - Field imaging - Imaging quality - Light intensity - Light intensity disturbance - Optical field - Optical field imaging - Reconstructed spectrum error - Spectra's
Classification code:744.8 Laser Beam Interactions - 921.6 Numerical Methods - 941.4 Optical Variables Measurements
DOI:10.3788/gzxb20225112.1211003
Funding details: Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Jiangsu Province;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:National Natural Science Foundation of China（No. 61875257），Natural Science Foundation of Shaanxi Province，China （No. 2017JM6035）of China（ No. 61875257） ， Natural Science Foundation
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 223>
Accession number:20222512247992
Title:Erratum: Terahertz photoconductive antenna based on antireflection dielectric metasurface with embedded plasmonic nanodisks (Applied Optics (2021) 60 (7921) DOI: 10.1364/AO.431678)
Authors:Jiang, Xiao-Qiang (1, 2); Fan, Wen-Hui (1, 2, 3); Song, Chao (1); Chen, Xu (1); Wu, Qi (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Fan, Wen-Hui(fanwh@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:17
Issue date:June 10, 2022
Publication year:2022
Pages:5010
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Erratum (ER)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">This erratum reports corrections in Figs. 5 and 8 of our previous paper [Appl. Opt. 60, 7921 (2021)]. An unclear description for Figs. 5(c)–5(e) and the incorrect color of the curves in Fig. 8(a) of Ref. [1] are corrected here. 1. Fig. 5(c)–5(e) caption: THz-PCA with GaAs square array and embedded Au structure of square array, disk array and hexagonal array, respectively. (Figure presented).<br/></div> © 2022 Optica Publishing Group
DOI:10.1364/AO.463162
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.ErratuFlg:2014444494
<RECORD 224>
Accession number:20223112459408
Title:Identification and separation of chiral particles by focused circularly polarized vortex beams
Authors:Zhang, Yanan (1, 2); Li, Manman (1); Yan, Shaohui (1); Zhou, Yuan (1, 2); Gao, Wenyu (1, 2); Yao, Baoli (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:39
Issue:8
Issue date:August 2022
Publication year:2022
Pages:1371-1377
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The identification and separation of chiral substances are of importance in the biological, chemical, and pharmaceutical industries. Here, we demonstrate that a focused circularly polarized vortex beam can, in the focal plane, selectively trap and rotate chiral dipolar particles via radial and azimuthal optical forces. The handedness and topological charge of the incident beam have strong influence on identifying and separating behavior: left- and right-handed circular polarizations lead to opposite effects on the particle of trapping and rotating, while the sign of topological charge will change the particle’s rotation direction. Such effects are a direct result of the handedness and topological charge manifesting themselves in the directions of the spin angular momentum (SAM) and Poynting vector. The research provides insight into the chiral light–matter interaction and may find potential application in the identification and separation of chiral nanoparticles.<br/></div> © 2022 Optica Publishing Group
Number of references:45
Main heading:Separation
Controlled terms:Chirality - Circular polarization - Incident light - Nanoparticles - Stereochemistry - Topology - Vortex flow
Uncontrolled terms:Chiral particles - Circularly-polarized - Dipolar particles - Focal Plane - Incident beams - Lefthanded - Optical force - Pharmaceutical industry - Topological charges - Vortex beams
Classification code:631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 802.3 Chemical Operations - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.3 Atomic and Molecular Physics - 933 Solid State Physics
DOI:10.1364/JOSAA.462817
Funding details: Number: 11904395,11974417, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2021YN13, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: ZDBS-LY-JSC035, Acronym: -, Sponsor: Key Research Program of Frontier Science, Chinese Academy of Sciences;
Funding text:Funding. National Natural Science Foundation of China (11904395, 11974417); Key Research Program of Frontier Science, Chinese Academy of Sciences (ZDBS-LY-JSC035); West Light Foundation of the Chinese Academy of Sciences (XAB2021YN13).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 225>
Accession number:20223312556529
Title:Reconstruction of weak near-infrared images in methyl red-doped nematic liquid crystals via stochastic resonance (Open Access)
Authors:Ji, Wentong (1, 2); Wang, Zhaolu (1); Huang, Nan (1); Liu, Hongjun (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100084, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:17
Issue date:August 15, 2022
Publication year:2022
Pages:30108-30120
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a near-infrared (NIR) image reconstruction method based on molecular reorientation of nematic liquid crystals (NLCs) doped with the azo-dye methyl red (MR). The signal can be recovered at the expense of noise via stochastic resonance. The numerical results show that image reconstruction based on the molecular reorientation in a magnetic field can be achieved when the input light intensity is 0.9W/cm<sup>2</sup>, this is due to the strong enhancement of the nonlinear optical response in MR doped-NLCs. The cross-correlation coefficient is increased from 0.26 to 0.54, and the maximum cross-correlation gain is 2.25. The results suggest a potential method in NIR weak optical image processing under noisy environments.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:37
Main heading:Nematic liquid crystals
Controlled terms:Azo dyes - Geometrical optics - Image enhancement - Image reconstruction - Infrared devices - Infrared imaging - Magnetic resonance - Optical data processing - Stochastic systems
Uncontrolled terms:Azo dye methyl red - Image reconstruction methods - Images reconstruction - Input light - Magnetic-field - Methyl-red - Molecular reorientation - Near- infrared images - Numerical results - Stochastic resonances
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 723.2 Data Processing and Image Processing - 731.1 Control Systems - 741.1 Light/Optics - 746 Imaging Techniques - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 961 Systems Science
Numerical data indexing:Power 9.00E-01W
DOI:10.1364/OE.462740
Funding details: Number: 61775234,61975232, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61975232, 61775234).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 226>
Accession number:20220411492416
Title:Rotation-aware correlation filters for robust visual tracking
Authors:Liao, Jiawen (1, 2, 3); Qi, Chun (2); Cao, Jianzhong (1); Wang, Xiaofang (4); Ren, Long (1, 2, 3); Zhang, Chaoning (5)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Qilu University of Technology (Shandong Academy of Sciences), Ji'nan; 250353, China; (5) Korea Advanced Institute of Science and Technology (KAIST), Daejeon; 34141, Korea, Republic of
Corresponding authors:Liao, Jiawen(liaojiawen@stu.xjtu.edu.cn); Qi, Chun(qichun@mail.xjtu.edu.cn)
Source title:Journal of Visual Communication and Image Representation
Abbreviated source title:J Visual Commun Image Represent
Volume:83
Issue date:February 2022
Publication year:2022
Article number:103422
Language:English
ISSN:10473203
E-ISSN:10959076
CODEN:JVCRE7
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Recent years have witnessed several modified discriminative correlation filter (DCF) models exhibiting excellent performance in visual tracking. A fundamental drawback to these methods is that rotation of the target is not well addressed which leads to model deterioration. In this paper, we propose a novel rotation-aware correlation filter to address the issue. Specifically, samples used for training of the modified DCF model are rectified when rotation occurs, rotation angle is effectively calculated using phase correlation after transforming the search patch from Cartesian coordinates to the Log-polar coordinates, and an adaptive selection mechanism is further adopted to choose between a rectified target patch and a rectangular patch. Moreover, we extend the proposed approach for robust tracking by introducing a simple yet effective Kalman filter prediction strategy. Extensive experiments on five standard benchmarks show that the proposed method achieves superior performance against state-of-the-art methods while running in real-time on single CPU.<br/></div> © 2022 Elsevier Inc.
Number of references:53
Main heading:Kalman filters
Controlled terms:Rotation - Benchmarking - Deterioration
Uncontrolled terms:Adaptive selection - Cartesian coordinate - Correlation filters - Filter model - Log polar coordinates - Performance - Phase correlation - Rotation angles - Selection mechanism - Visual Tracking
Classification code:931.1 Mechanics - 951 Materials Science
DOI:10.1016/j.jvcir.2021.103422
Funding details: Number: 61572395,61675161, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China [ 61572395 , 61675161 ].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 227>
Accession number:20222812349692
Title:Tensor Decomposition-Inspired Convolutional Autoencoders for Hyperspectral Anomaly Detection (Open Access)
Authors:Sun, Bangyong (1); Zhao, Zhe (1); Liu, Di (2); Gao, Xiaomei (3); Yu, Tao (4)
Author affiliation:(1) Xi'an University of Technology, School of Printing, Packaging and Digital Media, Xi'an; 710048, China; (2) Beijing Technology and Business University, Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing; 100048, China; (3) Xi'an Mapping and Printing of China National Administration of Coal Geology, Xi'an; 710199, China; (4) Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding author:Sun, Bangyong(sunbangyong@xaut.edu.cn)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:15
Issue date:2022
Publication year:2022
Pages:4990-5000
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Anomaly detection from hyperspectral images (HSI) is an important task in the remote sensing domain. Considering the three-order characteristics of HSI, many tensor decomposition based hyperspectral anomaly detection (HAD) models have been proposed and drawn much attention during the past decades. However, as most tensor decomposition based detectors are directly performed on the original HSI, the detection accuracy is usually limited due to the high-dimension and noise corruption of the HSI. Benefiting from the good capacity of autoencoders (AE) for feature extraction, in this article, an enhanced tensor decomposition-inspired convolutional AE for HAD is proposed to address those problems, named TDNet. Within the proposed TDNet, the traditional canonical-polyadic (CP) tensor decomposition model is innovatively alternated by a deep neural network (DNN), and the DNN tensor decomposition model performs more stably and robustly for noise. Specifically, a potential abnormal pixels remove strategy is first built to obtain the background training sets. Then, a DNN tensor decomposition-inspired convolutional AE is used to recover the original background information, which consists of an encoder, a low-rank tensor decomposition network, and a decoder. Finally, the residual errors between input HSI and recovered background are used for anomaly detection. Extensive experiments demonstrate the superiority of the TDNet in terms of both AUC values and ROC curves.<br/></div> © 2008-2012 IEEE.
Number of references:57
Main heading:Tensors
Controlled terms:Convolution - Deep neural networks - Extraction - Feature extraction - Hyperspectral imaging - Remote sensing - Spectroscopy
Uncontrolled terms:Anomaly detection - Auto encoders - Decomposition networks - Features extraction - HyperSpectral - Hyperspectral image - Neural-networks - Tensor decomposition - Tensor decomposition network
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 746 Imaging Techniques - 802.3 Chemical Operations - 921.1 Algebra
DOI:10.1109/JSTARS.2022.3184789
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 228>
Accession number:20225213303310
Title:High-gain Ultra-small Streak Camera and Its Integrated Control System
Title of translation:一种高增益超小型条纹相机及其集成控制系统
Authors:Zhang, Yuchi (1, 2); Tian, Jinshou (1, 3); Xue, Yanhua (1); Li, Zhibing (1); Li, Shaohui (1); Wang, Junfeng (1); Liu, Baiyu (1); Gao, Guilong (1); Chen, Ping (1); Wang, Xing (1); Zhao, Wei (1, 2)
Author affiliation:(1) Key Laboratory of Ultra⁃fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Taiyuan; 030000, China
Corresponding author:Tian, Jinshou(tianjs@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:10
Issue date:October 2022
Publication year:2022
Article number:1032003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">As a diagnostic instrument with ultra-high temporal and spatial resolution and spectral resolution， the streak camera is widely used in basic research fields such as physics， life sciences， and materials science， as well as in national strategic fields such as detonation physics， lidar， and inertial confinement fusion. Aiming at the requirements of airborne lidar for miniaturized， high-sensitivity， high-gain， and high spatiotemporal resolution streak camera， a high-brightness-gain compact streak camera and its new integrated control system are developed. Compared with the general picosecond visible light streak camera， the volume and weight of the camera are reduced by more than 2/3. The selected streak camera adopts the theoretical simulation research of cathode semiconductor and the method of optimizing the process to greatly improve the sensitivity of the cathode. Using a slit acceleration grid improves the photoelectron transmittance， enhances the photoelectron energy to give the fluorescent screen higher luminous efficiency， and optimizes the cathode process to improve the brightness gain. The streak image tube has the characteristics of high sensitivity， large detection field， high brightness gain， and high temporal and spatial resolution. Starting from the principle and control requirements， combined with the theoretical analysis of the defects of the active control system， a new type of high-integration control system is developed for the camera， which fully eliminates the low integration， poor reliability and compatibility of the previous version. defect. The hardware of the new control system adopts the design method of modularization and function reuse， and the PCB adopts the multi-layer board design. Compared with the current version， the degree of integration is increased by 2.36 times to achieve multi-device compatibility. The bottom layer of the system hardware is divided into main control module， power supply module， A/D module， D/A module， digital I/O and extended scan switching module： the main control module takes STM32F107VCT6 as the core and is responsible for the information between each module and the host computer Interaction； the power supply module is divided into a high-voltage power supply part and a low-voltage power supply part， which provide corresponding voltages for the stripe tube and each element of the circuit； the A/D module takes ADS1256 as the core， adds anti-static protection and digital-analog isolation to entirely eliminate noise interference， and uses SPI The protocol communicates with the host computer； the D/A module takes DAC8534 as the core to control the output of analog devices such as MCP and high-voltage power supply； the digital I/O and expansion scan switching module use the microcontroller GPIO as the control， and the 24 pins programmable interface supports function multiplexing. The PC-side visualization system realizes human-computer interaction and has functions such as camera control， instant feedback of collected images and data， and operation logs. The interface is concise and optimized， which greatly enhances the operability and maintainability of the camera. Finally， the streak tube static test system is used to test the parameters of the streak image tube： the cathode integral sensitivity is 268 μA/lm， the brightness gain is 20.1， and the time resolution is 36 ps； femtosecond laser， F-P etalon， DG645 delayer， oscilloscope， etc. built a dynamic test system for streak camera， and tested the static/dynamic spatial resolution， time resolution， control system function， etc. of the whole machine. The static spatial resolution is higher than 26 lp/mm， the full-screen scanning time is 600 ps， and the functions of control， monitoring and information exchange of the control system are normal. The developed streak camera works well in the laser radar and Inertial Confinement Fusion （ICF） picosecond laser targeting experiments.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:15
Main heading:Photons
Controlled terms:Control systems - Defects - Image resolution - Luminance - Modular construction - Photoelectrons - Reliability analysis - Streak cameras
Uncontrolled terms:Brightness gain - Cathode sensitivity - Compatibility - High gain - High sensitivity - High spatial resolution - High temporal resolution - Inertial-confinement fusions - Integrated control systems - Temporal and spatial
Classification code:405.2 Construction Methods - 711 Electromagnetic Waves - 731.1 Control Systems - 742.2 Photographic Equipment - 931.3 Atomic and Molecular Physics - 951 Materials Science
Numerical data indexing:Electric current 2.68E-04A, Time 3.60E-11s, Time 6.00E-10s
DOI:10.3788/gzxb20225110.1032003
Funding details: Number: GJJSTD20190004, Acronym: -, Sponsor: -;Number: 12075311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:National Natural Science Foundation of China （No. 12075311），The Scientific Instrument Developing Project of the Chinese Academy of Sciences （No. GJJSTD20190004），Strategic Priority Research Program of Chinese Academy of Sciences （No. XDA25030900），Youth Innovation Promotion Association CAS （No. 2021402）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 229>
Accession number:20222812340244
Title:Pointing Calibration Method for Imaging Systems of Photoelectric Theodolites with Multi-Field of View Stitching
Title of translation:基于多视场拼接光电经纬仪的成像系统指向校正方法
Authors:Zhao, Huaixue (1, 3); Liu, Bo (2); Xie, Meilin (2); Tian, Liude (1, 3); Zhou, Yan (1)
Author affiliation:(1) Testing Technology Research Center, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding authors:Zhao, Huaixue(zhaohuaixue@opt.ac.cn); Zhao, Huaixue(zhaohuaixue@opt.ac.cn)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:42
Issue:6
Issue date:March 25, 2022
Publication year:2022
Article number:0612002
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">After analyzing the traditional calibration model for target deviations of photoelectric theodolites and the characteristics of photoelectric theodolites with multi-field of view stitching, we derive a calibration formula for target deviations of photoelectric theodolites with imaging systems that have large collimation errors and zero offsets according to the principle of coordinate transformation. The above calibration formula and target simulator pointing are used to reversely deduce the calculation formula of target deviations of photoelectric theodolites with large collimation errors and zero offsets. The pointing calibration coefficient of the imaging system is solved through its actual target deviation. A verification test shows that the proposed approach breaks through the limitations of the existing distortion correction model and can be applied to pointing calibration of the imaging systems of photoelectric theodolites with multi-field of view stitching. The measurement system with a 2×3 externally stitched array discussed in this paper has a collimation error of 11.26° and a zero offset of 18.08°. Both the horizontal and vertical pointing errors are less than 1/5 pixel after the system is calibrated by the pointing calibration method for photoelectric theodolites with multiple externally stitched imaging modules.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:9
Main heading:Imaging systems
Controlled terms:Errors - Photoelectricity
Uncontrolled terms:Calibration method - Calibration model - Coordinate transformations - Field-of-view stitching - Multi-field - Photoelectric theodolite - Pointing calibration - Target deviation - Traditional calibration - Zero offsets
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics - 746 Imaging Techniques
DOI:10.3788/AOS202242.0612002
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 230>
Accession number:20223412611624
Title:Adaptive acquisition time scanning method for photon counting imaging system (Open Access)
Title of translation:光子计数成像系统的自适应累积时间扫描方法 (Open Access)
Authors:Zhu, Wen-Hua (1, 2, 3); Wang, Shu-Chao (1, 2, 3); Wang, Kai-Di (1, 2); Chen, Song-Mao (1, 2, 3); Ma, Cai-Wen (1, 2); Su, Xiu-Qin (1, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Su, Xiu-Qin(suxiuqin@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:15
Issue date:August 5, 2022
Publication year:2022
Article number:158702
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Photon counting imaging system has recently received a lot of attention in ultra-weak light detection. It has high sensitivity and temporal resolution. The single-point scanning photon counting imaging system typically accumulates a large number of photon events to reconstruct depth image. Acquisition time is redundant or insufficient, which limits imaging efficiency. In this work, a new method called adaptive acquisition time scanning method (AATSM) is proposed to solve this dilemma. Comparing with the fixed acquisition time of every pixel, the method can automatically select the acquisition time of per pixel to reduce total time of data collecting while obtaining depth images. In experiment, we acquire the depth images with the same quality by different scanning methods, showing the feasibility of AATSM. The total time ofcollecting data by the AATSM can be reduced to 11.87%, compared with fixed acquisition time of every pixel. This demonstrates the capability of speed scanning of AATSM, which can be used for the fast imaging of photon counting system.<br/></div> © 2022 Institute of Physics, Chinese Academy of Sciences. All rights reserved.
Number of references:28
Main heading:Imaging systems
Controlled terms:Image acquisition - Photons - Pixels - Scanning
Uncontrolled terms:Accumulate - Acquisition time - Adaptive acquisition - Adaptive scanning - Depth image - Photon counting - Photon-counting imaging - Scanning methods - Ultra-weak - Weak lights
Classification code:723 Computer Software, Data Handling and Applications - 746 Imaging Techniques - 931.3 Atomic and Molecular Physics
DOI:10.7498/aps.71.20220173
Funding details: Number: GQRC-19-19, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020M683600, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:* Project supported by the China Postdoctoral Science Foundation (Grant No. 2020M683600) and the Strategic High Technology Innovation Project of the Chinese Academy of Sciences, China (Grant No. GQRC-19-19). † Corresponding author. E-mail: suxiuqin@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 231>
Accession number:20224012823030
Title:Separating and Testing Method for Influencing Factors of Phase Stability ofDoppler Asymmetric Spatial Heterodyne Interferometer for Atmospheric Wind-Field Detection
Title of translation:大气风场探测多普勒差分干涉仪相位稳定性影响因素分离测试方法
Authors:Fu, Di (1, 2); Chang, Chenguang (1); Sun, Jian (1); Li, Juan (1); Wu, Kuijun (3); Feng, Yutao (1); Liu, Xuebin (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Optic-Electronic Information Science and Technology, Yantai University, Yantai; 264003, China
Corresponding authors:Feng, Yutao(fytiom@126.com); Liu, Xuebin(lxb@opt.ac.com)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:42
Issue:18
Issue date:September 25, 2022
Publication year:2022
Article number:1801003
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The Doppler asymmetric spatial heterodyne interferometer, a new type of mid- and upper-atmospheric wind-field detection system, can achieve atmospheric wind-field measurement by the inversion of the Doppler shift of observed source spectra after calculating the changes in interferograms. The reference phase is a necessary parameter to determine the Doppler shift of the wind field, and its stability is one of the core indicators to ensure the accuracy of wind speed measurement. This paper investigates three factors that affect the reference phase of an interferometer, namely, the phase drift of asymmetric quantities, phase slope drift, and phase drift of interferograms. Moreover, the theoretical analysis of the thermal phase drift is carried out on the basis of the principle of Doppler asymmetric spatial heterodyne interference. The separating and testing method for the phase-drift quantities of each factor is proposed, and the experimental test is conducted by the near-infrared Doppler asymmetric spatial heterodyne interferometer. Under the ambient temperature fluctuation of 0.27 ℃, the change of phase slope is 670 mrad/m, and the phase-drift fluctuation range of interferograms is 8.9 mrad. Upon the phase-drift correction of interferograms, the phase drift of asymmetric quantities is about 4.7 mrad, and the root mean square is 0.98 mrad, with the equivalent wind speed measurement error of 0.81 m/s. According to the bias experiment on temperature, the rate of phase-drift change of asymmetric quantities with temperature is -493 mrad/℃.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:20
Main heading:Wind
Controlled terms:Doppler effect - Heterodyning - Infrared devices - Interferometers - Interferometry - Testing
Uncontrolled terms:Atmospheric Winds - Dopple asymmetric spatial heterodyne interferometer - Doppler - Heterodyne interferometer - Interferograms - Mid- and upper-atmospheric wind-field detection - Phase drift - Spatial heterodyne - Testing and analyse - Wind field detection
Classification code:443.1 Atmospheric Properties - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
Numerical data indexing:Absorbed dose -4.93E-03Gy, Absorbed dose 4.70E-05Gy, Absorbed dose 6.70E-03Gy, Absorbed dose 8.90E-05Gy, Absorbed dose 9.80E-06Gy, Velocity 8.10E-01m/s
DOI:10.3788/AOS202242.1801003
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 232>
Accession number:20220611600356
Title:High time-resolution detector based on THz pulse accelerating and scanning electron beam (Open Access)
Title of translation:基于太赫兹脉冲加速及扫描电子束的高时间分辨探测器 (Open Access)
Authors:Li, Hang (1, 2, 3); Chen, Ping (1); Tian, Jin-Shou (1); Xue, Yan-Hua (1); Wang, Jun-Feng (1); Gou, Yong-Sheng (1); Zhang, Min-Rui (1); He, Kai (1); Xu, Xiang-Yan (1); Sai, Xiao-Feng (1); Li, Ya-Hui (1); Liu, Bai-Yu (1); Wang, Xiang-Lin (1); Xin, Li-Wei (1); Gao, Gui-Long (1); Wang, Tao (1); Wang, Xing (1); Zhao, Wei (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding authors:Chen, Ping(chenping@opt.cn); Tian, Jin-Shou(tianjs@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:2
Issue date:January 20, 2022
Publication year:2022
Article number:028501
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Terahertz pulses accelerating and scanning electron beam can break through the limitation of accelerating electric field between cathodes and grids in traditional streak tubes, thus reducing the time dispersion and enhancing the temporal resolution of time-scanning detectors. Based on this new technology, in this paper an ultra-small structured time-resolved detector with no focusing pole is designed. The terahertz pulse coupling/enhancing device suitable for acceleration zone and scanning zone is designed and optimized. The enhanced coefficient of the terahertz pulse electric field in the device reaches 9.39. In the paper, the relationship between time dispersion in acceleration zone and the moment of electrons emission is analyzed theoretically. We also analyze the influence of space charge effect on time dispersion. The electronic trajectory tracking is used to calculate and analyze the time dispersion of this detector, and finally the time resolution is better than 50fs.<br/></div> Copyright © 2022 Acta Physica Sinica. All rights reserved.
Number of references:19
Main heading:Electric fields
Controlled terms:Streak cameras - Terahertz waves - Dispersions - Scanning
Uncontrolled terms:Higher time resolution - Resolution detectors - Scanning detectors - Scanning electron beam - Streak tubes - Temporal resolution - Tera Hertz - Terahertz pulse - THz pulse - Time dispersion
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 742.2 Photographic Equipment - 951 Materials Science
Numerical data indexing:Time 5.00E-14s
DOI:10.7498/aps.71.20210871
Funding details: Number: 11805267,12075311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: MOE, Sponsor: Ministry of Education of the People's Republic of China;Number: 2021402,GJJSTD20190004,XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 11805267, 12075311), the Youth Innovation Promotion Association, Chinese Academy of Scineces (Grant No. 2021402), the Scientific Instrument Developing Project of the Chinese Academy of Sciences, China (Grant No. GJJSTD20190004), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA25030900), the Enterprise Top Innovative Young Talents Support Plan and the Key Laboratory for Laser Plasmas (Ministry of Education), China. † Corresponding author. E-mail: chenping@opt.cn ‡ Corresponding author. E-mail: tianjs@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 233>
Accession number:20221211827736
Title:Distance and depth modulation of Talbot imaging via specified design of the grating structure (Open Access)
Authors:Zhang, Zhenghui (1); Lei, Biao (1); Zhao, Guobo (1); Ban, Yaowen (1); Da, Zhengshang (2); Wang, Yishan (2); Ye, Guoyong (3); Chen, Jinju (4); Liu, Hongzhong (1)
Author affiliation:(1) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment, Zhengzhou University of Light Industry, Zhengzhou; 450002, China; (4) School of Engineering, Newcastle University, Newcastle upon Tyne; NE1 7RU, United Kingdom
Corresponding author:Ye, Guoyong(guoyongye@mail.xjtu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:7
Issue date:March 28, 2022
Publication year:2022
Pages:10239-10250
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">For positioning Talbot encoder and Talbot lithography, etc., properties manipulation of Talbot imaging is highly expected. In this work, an investigation on the distance and depth modulation of Talbot imaging, which employs a specially designed grating structure, is presented. Compared with the current grating structure, the proposed grating structure is characterized by having the phase layers with uneven thicknesses. Such a specific structural design can cause the offset of Talbot image from its nominal position, which in turn generates the spatial distance modulation of self-imaging and imaging depth expansion. Theoretical analysis is performed to explain its operating principle, and simulations and experiments are carried out to demonstrate its effectiveness.<br/></div> © 2022 Optica Publishing Group.
Number of references:38
Main heading:Modulation
Controlled terms:Diffraction gratings - Structural design
Uncontrolled terms:'current - Grating structures - Imaging depth - Operating principles - Phase layers - Property - Self imaging - Spatial distance - Talbot imaging
Classification code:408.1 Structural Design, General - 741.3 Optical Devices and Systems
DOI:10.1364/OE.449807
Funding details: Number: 52011530186,52075430, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY14-03, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:Funding. Key Research and Development Projects of Shaanxi Province (2020ZDLGY14-03); National Natural Science Foundation of China (52011530186, 52075430).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 234>
Accession number:20224513067968
Title:Multimode quantum squeezing generation via multiple four-wave mixing processes within a single atomic vapor cell
Authors:Qin, Wenqiang (1, 2, 3); Li, Jiawei (1, 2, 3); Chen, Zhili (1); Liu, Yuliang (1); Wei, Jiajia (1); Bai, Yonglin (2, 3); Cai, Yin (1); Zhang, Yanpeng (1)
Author affiliation:(1) Key Laboratory for Physical Electronics and Devices, The Ministry of Education, Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Cai, Yin(caiyin@mail.xjtu.edu.cn)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:39
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2769-2778
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Multimode quantum squeezing plays an essential role in the fields of quantum metrology and quantum information. In this paper, we first construct a three- and four-mode energy-level cascaded four-wave mixing system in a single <sup>85</sup>Rb vapor, and then analyze the quantum properties of the produced states, including the covariance matrix and the intensity squeezing with 11 possible Hamiltonians. In addition, the dressing field is applied to modulate the nonlinear susceptibility and the multimode quantum states. Our scheme allows active modulation of the quantum states integrated within the generation step, without the need for any post-operation of the optics. The mode number of the states also can be extended using more pump fields and the dressing effect. Our study provides a promising candidate to generate multimode quantum states and multimode quantum squeezing within a quantum device involved in the construction of practical quantum networks.<br/></div> © 2022 Optica Publishing Group.
Number of references:34
Main heading:Covariance matrix
Controlled terms:Four wave mixing - Hamiltonians - Quantum optics
Uncontrolled terms:Atomic vapor cell - Cascaded four-wave mixing - Four-wave-mixing process - Mixing system - Mode energies - Multimodes - Quantum Information - Quantum metrology - Quantum state - Squeezing generation
Classification code:741.1 Light/Optics - 921 Mathematics - 931.4 Quantum Theory; Quantum Mechanics
DOI:10.1364/JOSAB.465028
Funding details: Number: 11904279,12074303,12074306,12174302,61975159,62022066, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303700,2018YFA0307500, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2021TD-56, Acronym: -, Sponsor: Shaanxi Key Science and Technology Innovation Team Project;
Funding text:Funding. National Key Research and Development Program of China (2017YFA0303700, 2018YFA0307500); National Natural Science Foundation of China (11904279, 12074303, 12074306, 12174302, 61975159, 62022066); Shaanxi Key Science and Technology Innovation Team Project (2021TD-56).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 235>
Accession number:20223412623215
Title:Influence on imaging performance and evaluation of Wolter-I type mandrel fabrication errors
Authors:Wu, Kaiji (1); Ding, Fei (1); Yang, Yanji (2); Li, Duo (1); Qiao, Zheng (1); Qiang, Pengfei (3); Wang, Bo (1)
Author affiliation:(1) Center for Precision Engineering, Harbin Institute of Technology, Harbin; 150001, China; (2) Institute of High Energy Physics of the Chinese Academy of Sciences, Beijing; 100086, China; (3) Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Qiao, Zheng(qiaozheng@hit.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:22
Issue date:August 1, 2022
Publication year:2022
Pages:6617-6626
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The electroforming replication process has been widely used in the fabrication of nested x-ray telescopes. The imaging performance of the mirrors is determined largely by the shape accuracy of the mandrels. To predict the imaging performance of mirrors replicated frommandrels with different parameter and fabrication errors, a special Monte Carlo ray tracing model is established and verified by experiments. Then, based on ray tracing numerical calculation, the influence of each major fabrication error is discussed. Furthermore, according to the results obtained by the simulation of slope error, a method for evaluating the relationship between the mandrel full-band errors and imaging quality is proposed and then verified by experiments. The results show that the power spectral density (PSD) reference given by the method can well reflect the quality of the mandrels, and guide the fabrication process.<br/></div> ©2022 Optica Publishing Group.
Number of references:20
Main heading:Mirrors
Controlled terms:Errors - Fabrication - Ray tracing - Spectral density
Uncontrolled terms:Electroforming replication - Fabrication errors - Imaging evaluation - Imaging performance - Monte-Carlo ray tracing - Parameter error - Ray-tracing model - Replication process - Wolter I - X ray telescope
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1364/AO.460960
Funding details: Number: XDA15310000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funding. The Strategic Priority Research Program of the Chinese Academy of Sciences (XDA15310000).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 236>
Accession number:20224513069013
Title:Laser Far-Field Focal Spot Measurement Method Based on Multistep Phase Retrieval
Title of translation:基于多步相位恢复的激光远场焦斑测量方法
Authors:Xiaoyi, Chen (1, 2); Yaxuan, Duan (1); Zhengzhou, Wang (1); Suochao, Yuan (1); Zhengshang, Da (1)
Author affiliation:(1) Advanced Optical Instrument Research Department, Xi 'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yaxuan, Duan(duanyaxuan@opt.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:7
Issue date:April 10, 2022
Publication year:2022
Article number:0704002
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective The intensity distribution of the laser far-field focal spot is an essential index for measuring the quality of laser beams. It is also the main parameter that reflects the laser beam' s ability to enter the hole in the inertial confinement fusion system. How to measure the intensity distribution of the laser far-field focal spot with high precision determines the evaluation result of the overall performance of the laser system. It is of great guiding significance in the theoretical design stage, development stage, or final stage of practical operation of the laser device. Direct measurement methods of far-field focal spots include the long-focal-length imaging, array camera, and schlieren methods. The long-focal-length lens imaging method is limited by the linear response range of the detector. The array camera method uses a wedge, which introduces additional optical path difference and wave aberration. The schlieren method measures the main lobe and side lobe of the focal spot separately, which is easily affected by the measured environment and noise. The Shack-Hartmann wavefront measurement is an indirect measurement method and causes the loss of middle and high frequency information due to its frequency response characteristics. To achieve a high-precision measurement of far-field focal spot, this paper proposes a method based on multistep phase retrieval for measuring far-field focal spots. Theoretically, a focal spot reconstruction model based on multistep phase retrieval is derived. Then, the chirp-z transform (CZT) is introduced to solve the problem of under-sampling in calculating focal spots. Compared with the traditional fast Fourier transform (FFT) with zero-padding, using CZT to calculate the focal spot avoids calculation redundancy. The proposed method has a higher measurement accuracy of a focal spot than the traditional long-focal-length lens imaging method. Methods The proposed laser far-field focal spot measurement method based on multistep phase retrieval can be divided into two parts. First, the multistep phase retrieval method is used to obtain the near-field complex amplitude of the object plane. Then, it is substituted into the reconstructed model of the laser far-field focal spot and uses CZT to obtain the intensity distribution of the laser far-field focal spot. Meanwhile, considering that the multistep phase retrieval method will introduce distance errors due to the translation of the detector, the quantum genetic algorithm (QGA) is used to optimize the distance errors. The laser far-field focal spot reconstruction algorithm based on multistep phase retrieval is presented. We use the theoretical simulation to analyze the influence of scanning step size and the number of detection positions on the convergence of the proposed method. Thus, the optimal scanning step size and the number of detection positions are determined. Furthermore, a verification device based on a pure phase liquid crystal spatial light modulator (SLM) is set up experimentally to verify the effectiveness of the proposed method. We also compare the experimental results of the proposed method and traditional long-focal-length lens imaging method. Results and Discussions In the simulation, the laser near-field complex amplitude of the object plane is effectively retrieved. The retrieved and theoretical focal spots have the same distribution of main lobe and side lobe in the focal spot (Fig. 7). Compared with CZT, the focal spot calculated using FFT is under-sampled, and the detailed information in the focal spot is lost (Fig. 7). The power in the bucket (PIB) curves of theoretical and retrieved focal spots are completely coincident in the integral area of the entire bucket radius (Fig. 7). In the experiment, the main lobe distribution between the theoretical and retrieved far-field focal spots is consistent (Fig. 9). However, the optical components introduce small aberrations, and the surfaces of these optical components will interfere with each other, resulting in a small difference between the distribution of side lobes for the theoretical and retrieved far-field focal spots (Fig. 9). In the traditional long-focal-length lens imaging method, the introduction of lens aberrations and insufficient dynamic response range of the CCD lead to larger errors in the main lobe and side lobe of focal spots than those in the theoretical focal spot (Fig. 9). The correlation coefficient between the retrieved focal spot using the proposed method and the theoretical focal spot is 0.9976. However, the correlation coefficient between the measured focal spot using the long-focal-length lens imaging method and the theoretical focal spot is 0. 9477. This also confirms that the measurement accuracy of focal spots using the proposed method is much higher than that of the long-focal-length lens imaging method. Conclusions This paper proposes a laser far-field focal spot measurement method based on multistep phase retrieval. The effectiveness of the method is verified through theoretical simulation and experiments. The theoretical simulation results show that the near-field complex amplitude and far-field focal spot of lasers are effectively retrieved. Additionally, the PIB curves of the theoretical and retrieved focal spots are coincident. Moreover, the experimental results show that the profile of the retrieved phase is consistent with that of the theoretical phase loaded using SLM. Therefore, the retrieved and theoretical focal spots have the same distribution of the main lobe. However, there is a small difference in the side lobes because the optical components introduce small aberrations, and the surfaces of these optical components will interfere with each other. The side lobe information of focal spots using the long-focal-length lens imaging method is lost because of the limited dynamic response range in CCD. Therefore, the proposed method has higher precision of laser far-field focal spot than the traditional long-focal-length lens imaging method. The results show that the proposed method can provide a technical means for the high-precision measurement of laser far-field focal spots.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:30
Main heading:Fast Fourier transforms
Controlled terms:Aberrations - Cameras - Frequency response - Genetic algorithms - Information retrieval - Laser beams - Wavefronts - Z transforms
Uncontrolled terms:Chirp-z transform - Far-field focal spots - Focal-spot - Imaging method - Long focal lengths - Main lobes - Multisteps - Optical components - Phase retrieval - Side lobes
Classification code:742.2 Photographic Equipment - 744.8 Laser Beam Interactions - 903.3 Information Retrieval and Use - 921.3 Mathematical Transformations
DOI:10.3788/CJL202249.0704002
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 237>
Accession number:20220911734760
Title:Design and analysis of radial supports for a large aperture prism
Authors:Wen, Wansha (1, 2, 3); Ruan, Ping (1, 3); Lv, Tao (1, 2, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17 Xinxi Road, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, No.17 Xinxi Road, Xi'an; 710119, China
Corresponding author:Ruan, Ping
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121663B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">WFOS (Wide-field Optical Spectrograph) will be seriously affected by atmospheric dispersion on imaging quality in its operating wavelength range1 (0.31-1.0 micron). ADC (Atmospheric Dispersion Corrector)2 can compensate atmospheric dispersion for light deflection of different wavelengths. The main optical elements of a LADC3 (Linear Atmospheric Dispersion Corrector) are two large aperture transmission prisms whose optical axes are placed horizontally. The prisms are placed opposite to 180° and separated by a certain distance in the direction of the optical axis to generate the amount of dispersion compensation. the large-diameter wedge prisms not only make a linear motion in the optical axis direction but also operate rotary motion separately. Because of the non-rotational symmetry and large mass of the wedge prism, gravity has a serious effect on the surface deformation of the prism. In addition, the prisms have to withstand ±20°C temperature change when they work. a support system is proposed and a comparative analysis is operated to estimate performance of support forms with different number of supports. Different circumferential support positions three, four, six, and eight schemes are analyzed and compared. in addition, the influence of different supports layouts based on the six supports scheme are analyzed. The 3D models are established and finite element analyses are conducted to evaluate the support performance via the surface RMS values which show that the design can meet the current design requirements for the support scheme.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Finite element method
Controlled terms:Gravitation - Prisms - Light transmission
Uncontrolled terms:Atmospheric dispersion - Atmospheric Dispersion Correctors - Finite element analyse - Large aperture - Large aperture prism - Optical axis - Optical surface evaluation - Optical surfaces - Radial support - Surface evaluations
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 921.6 Numerical Methods - 931.5 Gravitation, Relativity and String Theory
Numerical data indexing:Temperature 2.93E+02K
DOI:10.1117/12.2616346
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 238>
Accession number:20220153951
Title:Super-resolution multicolor fluorescence microscopy enabled by an apochromatic super-oscillatory lens with extended depth-of-focus
Authors:Li, Wenli (1, 2, 3); He, Pei (1, 2, 3); Fan, Yulong (4); Du, Yangtao (5); Gao, Bo (6); Chu, Zhiqin (7); An, Chengxu (1, 2, 3); Lei, Dangyuan (4); Yuan, Weizheng (1, 2, 3); Yu, Yiting (1, 2, 3)
Author affiliation:(1) Research & Development Institute of Northwestern Polytechnical University in Shenzhen, College of Mechanical Engineering, Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Xi'An; 710072, China; (2) Key Laboratory of Micro/Nano Systems for Aerospace (Ministry of Education), Northwestern Polytechnical University, Xi'An; 710072, China; (3) Shaanxi Province Key Laboratory of Micro and Nano Electro-Mechanical Systems, Northwestern Polytechnical University, Xi'An; 710072, China; (4) Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong; (5) The Institute of Ai and Robotics, Fudan University, Shanghai; 200433, China; (6) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian; 710119, China; (7) Department of Electrical and Electronic Engineering, Joint Appointment with School of Biomedical Sciences, The University of Hong Kong, 999077, Hong Kong
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 5, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Multicolor super-resolution imaging remains an intractable challenge for both far-field and near-field based super-resolution techniques. Planar super-oscillatory lens (SOL), a far-field subwavelength-focusing diffractive lens device, holds great potential for achieving sub-diffraction-limit imaging at multiple wavelengths. However, conventional SOL devices suffer from a numerical aperture (NA) related intrinsic tradeoff among the depth of focus (DoF), chromatic dispersion and focus spot size, being an essential characteristics of common diffractive optical elements. Typically, the limited DoF and significant chromatism associated with high NA can lead to unfavorable degradation of image quality although increasing NA imporves the resolution. Here, we apply a multi-objective genetic algorithm (GA) optimization approach to design an apochromatic binary-phase SOL that generates axially jointed multifoci concurrently having prolonged DoF, customized working distance (WD) and suppressed side-lobes yet minimized main-lobe size, optimizing the aforementioned NA-dependent tradeoff. Experimental implementation of this GA-optimized SOL demonstrates simultaneous focusing of blue, green and red light beams into an optical needle of ∼0.5λ in diameter and >10λ in length (DoF) at 428 μm WD, resulting in an ultimate resolution better than λ/3 in the lateral dimension. By integrating this apochromatic SOL device with a commercial fluorescence microscope, we employ the optical needle to perform, for the first time, three-dimensional super-resolution multicolor fluorescence imaging of the "unseen" fine structure of neurons at one go. The present study provides not only a practical route to far-field multicolor super-resolution imaging but also a viable approach for constructing imaging systems avoiding complex sample positioning and unfavorable photobleaching.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:58
Main heading:Needles
Controlled terms:Diffraction - Fluorescence imaging - Fluorescence microscopy - Genetic algorithms - Image resolution - Photobleaching - Sols
Uncontrolled terms:Extended depth of focus - Far-field - Multi-colors - Multicolor fluorescence - Numerical aperture - Optical- - Super resolution imaging - Superresolution - Working distances
Classification code:741.1 Light/Optics - 746 Imaging Techniques - 801 Chemistry - 804 Chemical Products Generally - 931.4 Quantum Theory; Quantum Mechanics - 941.3 Optical Instruments
Numerical data indexing:Size 4.28E-04m, Size 7.62E-02m
DOI:10.48550/arXiv.2206.02335
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.02335v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 239>
Accession number:20224012823590
Title:Variable Curvature Mirror with Variable Thickness and Its Application in Space-Borne Optical Camera
Title of translation:变厚变曲率反射镜及其在空间相机中的应用
Authors:Zhao, Hui (1); Xie, Xiaopeng (1); Gao, Limin (2); Fan, Xuewu (1); Xu, Liang (3); Ma, Zhen (3); Pei, Yongle (4)
Author affiliation:(1) Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Chief Engineer Office, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Advanced Optics Manufacturing Center, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Laboratory of Aeronautical Optoelectronic Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:42
Issue:17
Issue date:September 10, 2022
Publication year:2022
Article number:1723002
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">A variable curvature mirror is a kind of active optical element. By changing its curvature radius, the corresponding wave-front could be dynamically controlled. First of all, the current situation and development trend of variable curvature mirrors are summarized systematically. After that, the physical model of deformation of variable curvature mirrors with variable thickness is established and the capability of this kind of variable curvature mirror in generating large saggitus and maintaining good surface figure accuracy is proven through numerical simulation and experiments. Finally, the application of variable curvature mirrors with variable thickness in space optical cameras is explored from three aspects. In the first place, in order to satisfy the requirement for the super large saggitus variation required by realizing large magnification ratio zoom imaging, a finite element alternating (FEA) based optimization procedure by incorporating high-order spherical deformation is designed, and the mirror with the saggitus variation approaching 1 mm is obtained. In the second place, aiming at the requirements of focusing accuracy and speed in space camera imaging, a high-precision large dynamic focusing method based on sub-mirror variable curvature mirrors is proposed. In the third place, a coding imaging method using a variable curvature secondary mirror to scan quickly along the optical axis during integration time is proposed.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:39
Main heading:Mirrors
Controlled terms:Cameras - Deformation - Thickness measurement - Wavefronts
Uncontrolled terms:Active Optics - Curvature radius - Focus adjusting - ITS applications - Optical camera - Optical zooming - Space-borne - Space-borne optical camera - Variable curvature mirror - Variable thickness
Classification code:741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 943.2 Mechanical Variables Measurements
Numerical data indexing:Size 1.00E-03m
DOI:10.3788/AOS202242.1723002
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 240>
Accession number:20224212988042
Title:Highly linear integrated lithium niobate modulator based on ring-assisted Mach-Zehnder interferometer
Authors:Feng, Hanke (1); Zhang, Ke (1); Sun, Wenzhao (1); Ren, Yangming (2, 3); Zhang, Yiwen (1); Zhang, Wenfu (2, 3); Wang, Cheng (1)
Author affiliation:(1) Department of Electrical Engineering, State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, Hong Kong; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Lnstitute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Feng, Hanke(hankefeng2-c@my.cityu.edu.hk)
Source title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Issue date:2022
Publication year:2022
Article number:JW3B.187
Language:English
ISBN-13:9781957171050
Document type:Conference article (CA)
Conference name:2022 Conference on Lasers and Electro-Optics, CLEO 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:182946
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We report an ultra-high-linearity modulator on thin-film lithium niobate platform based on the ring-assisted Mach-Zehnder interferometer (RAMZI) structure, with measured spurious free dynamic range (SFDR) up to 120.04 dBHz<sup>4/5</sup> at 1GHz.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:6
Main heading:Mach-Zehnder interferometers
Controlled terms:Light modulators - Lithium - Niobium compounds
Uncontrolled terms:High linearity - Lithium niobate - Spurious free dynamic range - Thin-films - Ultra-high
Classification code:542.4 Lithium and Alloys - 549.1 Alkali Metals - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Frequency 1.00E+09Hz
Funding details: Number: 9610402,9610455, Acronym: -, Sponsor: City University of Hong Kong;Number: -, Acronym: -, Sponsor: Croucher Foundation;Number: 61922092, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11204820,21208219,NCityUl 13/20, Acronym: UGC, Sponsor: University Grants Committee;Number: -, Acronym: 研究資助局, Sponsor: Research Grants Council, University Grants Committee;
Funding text:This work is supported in part by National Natural Science Foundation of China (61922092); Research Grants Council, University Grants Committee (CityU 11204820, CityU 21208219, NCityUl 13/20); Croucher Foundation; City University of Hong Kong (9610402, 9610455).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 241>
Accession number:20221211832362
Title:External Attention Based TransUNet and Label Expansion Strategy for Crack Detection
Authors:Fang, Jie (1, 2); Yang, Chen (3); Shi, Yuetian (4, 5); Wang, Nan (4, 5); Zhao, Yang (6)
Author affiliation:(1) Xi'an University of Posts and Telecommunications, School of Telecommunication and Information Engineering, Shaanxi, Xi'an; 710121, China; (2) Corporation of Shaanxi Wukong Clouds Information and Technology, Shaanxi, Xi'an; 710000, China; (3) Pudong Development Bank, Ministry of Science and Technology, Shaanxi, Xi'an; 710065, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Key Laboratory of Spectral Imaging Technology Cas, Shaanxi, Xi'an; 710119, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China; (6) Chang'an University, College of Transportation Engineering, Shaanxi, Xi'an; 710064, China
Corresponding author:Fang, Jie(2443952262@qq.com)
Source title:IEEE Transactions on Intelligent Transportation Systems
Abbreviated source title:IEEE Trans. Intell. Transp. Syst.
Volume:23
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:19054-19063
Language:English
ISSN:15249050
E-ISSN:15580016
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Crack detection is an indispensable premise of road maintenance, which can provide early warning information for many road damages and save repair costs to a large extent. Because of the security and convenience, many image processing technique (IPT) based crack detection methods have been proposed, but their performances often cannot meet the requirements of practical applications because of the complex texture structure and seriously imbalanced categories. To address the aforementioned problem, we present an external attention based TransUNet for crack detection. Specifically, we tackle the TransUNet as the backbone of our detection framework, which can propagate the detailed texture information from shallow layers to corresponding deep layers through skip connections. Besides, the Transformer Block equipped in the second last convolution layer of the encoding component can explicitly model the long-range dependency of different regions in an image, which improves the structural representation ability of the framework and hence alleviates the interference from shadow, noise, and other negative factors. In addition, the External Attention Block equipped in the last convolution layer of the encoding component can effectively exploit the dependency of crack regions among different images, and further enhance the robustness of the framework. Finally, combined with the Focal Loss, the proposed label expansion strategy can further alleviate the category imbalance problem through transforming semantic categories of non-crack pixels distributed in the neighbors of corresponding crack pixels.<br/></div> © 2000-2011 IEEE.
Number of references:41
Main heading:Feature extraction
Controlled terms:Convolution - Crack detection - Damage detection - Deep learning - Encoding (symbols) - Image enhancement - Pixels - Repair - Roads and streets - Semantics - Signal encoding
Uncontrolled terms:Deep learning - Encodings - Expansion strategies - External attention - Features extraction - Label expansion. - Road - Road maintenance - Transformer - Transunet
Classification code:406.2 Roads and Streets - 461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 913.5 Maintenance
DOI:10.1109/TITS.2022.3154407
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 242>
Accession number:20221712035711
Title:Multi-View Auxiliary Diagnosis Algorithm for Lung Nodules (Open Access)
Authors:Qiu, Shi (1); Li, Bin (2); Zhou, Tao (3); Li, Feng (4); Liang, Ting (5)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Information Science and Technology, Northwest University, Xi'an; 710127, China; (3) School of Computer Science and Engineering, North Minzu University, Yinchuan; 750021, China; (4) Institute of Education, University College London, London, United Kingdom; (5) Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an; 10061, China
Corresponding author:Li, Bin(lib@nwu.edu.cn)
Source title:Computers, Materials and Continua
Abbreviated source title:Comput. Mater. Continua
Volume:72
Issue:3
Issue date:2022
Publication year:2022
Pages:4897-4910
Language:English
ISSN:15462218
E-ISSN:15462226
Document type:Journal article (JA)
Publisher:Tech Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Lung is an important organ of human body. More and more people are suffering from lung diseases due to air pollution. These diseases are usually highly infectious. Such as lung tuberculosis, novel coronavirus COVID-19, etc. Lung nodule is a kind of high-density globular lesion in the lung. Physicians need to spend a lot of time and energy to observe the computed tomography image sequences to make a diagnosis, which is inefficient. For this reason, the use of computer-assisted diagnosis of lung nodules has become the current main trend. In the process of computer-aided diagnosis, how to reduce the false positive rate while ensuring a low missed detection rate is a difficulty and focus of current research. To solve this problem, we propose a three-dimensional optimization model to achieve the extraction of suspected regions, improve the traditional deep belief network, and to modify the dispersion matrix between classes. We construct a multi-view model, fuse local three-dimensional information into two-dimensional images, and thereby to reduce the complexity of the algorithm. And alleviate the problem of unbalanced training caused by only a small number of positive samples. Experiments show that the false positive rate of the algorithm proposed in this paper is as low as 12%, which is in line with clinical application standards.<br/></div> © 2022 Tech Science Press. All rights reserved.
Number of references:42
Main heading:Computer aided diagnosis
Controlled terms:Three dimensional computer graphics - Biological organs - Computational complexity - Coronavirus - Computerized tomography - Diseases
Uncontrolled terms:'current - Computed tomography images - Coronaviruses - Deep belief networks - Diagnosis algorithms - Energy - False positive rates - Human bodies - Lung nodule - Multi-views
Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.2 Data Processing and Image Processing - 723.5 Computer Applications
Numerical data indexing:Percentage 1.20E+01%
DOI:10.32604/cmc.2022.026855
Funding details: Number: 2020KYQD08, Acronym: -, Sponsor: -;Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 2020BEB04022, Acronym: -, Sponsor: Key Research and Development Program of Ningxia;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M683696XB, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: A2206, Acronym: ZJU, Sponsor: Zhejiang University;Number: 2021JQ-455, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;
Funding text:This work was supported by Science and Technology Rising Star of Shaanxi Youth (No. 2021KJXX-61); The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No. A2206); TheChina Postdoctoral Science Foundation (No. 2020M683696XB);Natural Science Basic Research Plan in Shaanxi Province of China (No. 2021JQ-455); Natural Science Foundation of China (No. 62062003), Key Research and Development Project of Ningxia (Special projects for talents) (No. 2020BEB04022); North Minzu University Research Project of Talent Introduction (No. 2020KYQD08).Funding Statement: This work was supported by Science and Technology Rising Star of Shaanxi Youth (No. 2021KJXX-61); The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No. A2206); The China Postdoctoral Science Foundation (No. 2020M683696XB); Natural Science Basic Research Plan in Shaanxi Province of China (No. 2021JQ-455); Natural Science Foundation of China (No. 62062003), Key Research and Development Project of Ningxia (Special projects for talents) (No. 2020BEB04022); North Minzu University Research Project of Talent Introduction (No. 2020KYQD08).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 243>
Accession number:20223712736215
Title:Design and optimization of a support system for large aperture wedge prisms based on an integrated opto-mechanical analysis (Open Access)
Authors:Wen, Wansha (1, 2, 3); Ruan, Ping (2, 3); Lv, Tao (1, 2, 3); Li, Baopeng (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17 Xinxi Road, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, No.17 Xinxi Road, Xi'an; 710119, China
Corresponding author:Ruan, Ping(ruanp@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:19
Issue date:September 12, 2022
Publication year:2022
Pages:34629-34644
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A stable and reliable support system for large aperture wedge prisms is the priority of the atmospheric dispersion corrector (ADC). The prism is not a rotationally symmetric component, and the stress distribution on large aperture wedge prisms caused by the support system is different compared with the rotationally symmetric mirror. A scheme of support forces passing through the prism center of gravity (COG) is proposed in this paper. Comparing with the scheme of support force passing through the prism geometry center of rotation (COR) under the same conditions, the root-mean-square (RMS) value of the optical surface shape error shows that the proposed scheme obtains better optical surface quality when the prism rotates from 0° to 360° under the conditions of gravity coupling at 2°C and 42°C. In addition, based on the proposed scheme, a multi-island genetic algorithm (MIGA) is used to optimize the position parameters of the supports. The results show that the RMS value of the optical surface deformation of the wedge prism decreases effectively. Under the conditions of gravity coupling at temperatures of 2°C and 42°C, the RMS value decreases from 260.7 nm to 107.8 nm with 58.6% and from 108.6 nm to 69.5 nm with 36.0%, respectively.<br/></div> © 2022 Optica Publishing Group.
Number of references:31
Main heading:Prisms
Controlled terms:Atmospheric movements - Genetic algorithms - Geometry
Uncontrolled terms:Condition - Design and optimization - Large aperture - Mean square values - Optical surfaces - Opto-mechanical analysis - Root Mean Square - Support forces - Support systems - Wedge prisms
Classification code:443.1 Atmospheric Properties - 741.3 Optical Devices and Systems - 921 Mathematics
Numerical data indexing:Percentage 3.60E+01%, Percentage 5.86E+01%, Size 1.086E-07m to 6.95E-08m, Size 2.607E-07m to 1.078E-07m, Temperature 2.75E+02K, Temperature 3.15E+02K
DOI:10.1364/OE.471819
Funding details: Number: 12103081, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (12103081).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 244>
Accession number:20221611967564
Title:Optimization of focusing position in laser induced breakdown spectroscopy system based on quantitative analysis internal standard method of steel
Authors:Li, Zhicong (1, 2); Yang, Jianfeng (1); Wang, Zhiyuan (2, 3); Zhao, Yiyi (1); Huang, Shuaidong (1, 2); Liu, Shengrun (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai; 201800, China
Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:12169DG
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">A laser induced breakdown spectroscopy (LIBS) system has many experimental key parameter factors. Focusing position in laser induced breakdown spectroscopy (LIBS) system is an experimental key parameter factor. The optimization of spectral intensity has been studied, but the results are often inaccurate. In this Letter, A quantitative analysis internal standard method was proposed to optimize the parameter of LIBS experimental system. One 100mm focusing lens and eight standard alloy steels with rich element content were employed as samples. By employing internal standard method, the minority elements (Mn, Cr, Cu) in steels were quantitatively analyzed and the element detection sensitivity was obtained. The limit of detection (LOD) of the minority elements under different focusing states was calculated, and finally the optimal focus position was obtained. The result which indirectly shows that the best laser focusing position of LIBS system with 100mm focusing lens is 6mm below the surface of samples, and the limit of detection (LOD) of the minority elements maintain the minimum value at this position (0.00159 wt.%), which indicates that the quantitative analysis method is effective and reliable for optimizing the parameters of LIBS system.<br/></div> © 2022 SPIE
Number of references:21
Main heading:Spectrum analysis
Controlled terms:Focusing - Atomic emission spectroscopy - Laser induced breakdown spectroscopy
Uncontrolled terms:Detection sensitivity - Experimental system - Focus positions - Focusing lens - Internal standard method - Keys parameters - Laserinduced breakdown spectroscopy (LIBS) - Limit of detection - Optimisations - Spectral intensity
Classification code:931.1 Mechanics
Numerical data indexing:Size 1.00E-01m, Size 6.00E-03m
DOI:10.1117/12.2627459
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 245>
Accession number:20221912096733
Title:Rocket Attitude Measurement Technology in Vertical Take-off Phase Based on Lidar
Title of translation:基于激光雷达的火箭垂直起飞段姿态测量技术
Authors:Shi, Heng (1, 2, 3, 4); Gao, Xin (1); Li, Xiyu (1); Lei, Chengqiang (1); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1); Tang, Jia (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin526@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:4
Issue date:April 25, 2022
Publication year:2022
Pages:231-239
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The attitude measurement data in the vertical take-off phase of a rocket is of great significance to analyze the running orbit, aerodynamic parameters and flight control performance of rocket. The traditional attitude measurement of rocket vertical take-off phase mainly includes telemetry, optical measurement, and radar measurement. The violent vibration has a great impact on the attitude measurement accuracy of telemetry, and once the rocket takes-off fails, it is difficult for telemetry method to obtain effective original analysis data. Although the optical measurement accuracy is high, it needs to use multi station optical equipment to interpret the rocket attitude data after rendezvous, so the real-time performance is poor, and the optical equipment is vulnerable to the interference of weather environment and tail flame during take-off phase, so there is a risk of missing rendezvous data. Although radar measurement is little affected by weather conditions, it is easy to be disturbed by ground clutter. Therefore, there is no external real-time attitude measurement data in the rocket vertical take-off phase. It is urgent to fill the data gap in this phase through new measurement methods to ensure the safety of the rocket vertical take-off phase.Aiming at the technical problems of external real-time attitude measurement in rocket vertical take-off phase, considering the advantages of Lidar, such as high precision, all-time measurement, high resolution and not easily disturbed by environment, the real-time attitude measurement method in rocket vertical take-off phase based on Lidar is proposed in this paper. Raytheon intelligent MS03-A500 four wire Lidar is adopted, and the Lidar is installed on the two-axis tracking frame to form the measurement system. Before the rocket is launched, the Lidar continues to scan the middle and upper part of the rocket to obtain the static laser point cloud data, correct the point cloud data and solve the spatial coordinates, and adopt the multi ellipse center fitting central axis algorithm. It is calculated and analyzed that the static and dynamic attitude measurement accuracy of Lidar are 0.018 8° and 0.049 8° respectively. In the rocket launch test, the Lidar measurement system is arranged at a launch site 150 meters away from the rocket. In the rocket vertical take-off phase, the Lidar tracks and scans the fixed position of the rocket with high precision, and obtains the rocket attitude change value with real-time and high precision.To verify the reliability and rationality of Lidar measurement data, three sets of optical equipment are used to measure the rocket attitude angle intersection at the same time. After comparing the rocket attitude change values measured by Lidar and optical equipment, the following conclusions are drawn: 1) According to the measurement accuracy calculation results and the verification of test data, the attitude measurement accuracy based on Lidar is about 5 times higher than that of optical measurement equipment. 2) Considering the different measurement accuracy of the two equipment, the variation trend of rocket yaw angle and pitch angle measured by Lidar and optical equipment is basically the same in this test, which verifies the correctness and rationality of the attitude measurement methods and measurement accuracy of the two kinds of equipment. 3) The real-time high-precision attitude measurement and data output of the rocket based on Lidar is realized, which effectively fills the gap of a real-time attitude measurement outside the rocket, provides a real-time attitude data source for security control equipment, and ensures the launch safety of the rocket.<br/></div> © 2022, Science Press. All right reserved.
Number of references:16
Main heading:Optical radar
Controlled terms:Optical data processing - Rockets - Vibration analysis - Telemetering equipment - Radar measurement
Uncontrolled terms:Attitude measurement - Attitude measurement accuracy - Central axis - Elliptic center fitting central axis - Measurement accuracy - Rocket attitude measurement - The point cloud data - Vertical take-off
Classification code:654.1 Rockets and Missiles - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.50E+02m
DOI:10.3788/gzxb20225104.0412002
Funding details: Number: 2021406, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The Youth Innovation Promotion Association CAS Fund Project(No.2021406), Key Laboratory of Space Precision Measurement Technology CAS Fund Project (No.29J21-063-Ⅲ)Foundation item：The Youth Innovation Promotion Association CAS Measurement Technology CAS Fund Project（No.29J21-063-Ⅲ）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 246>
Accession number:20224112862994
Title:Long-working-distance 3D measurement with a bionic curved compound-eye camera (Open Access)
Authors:Liu, Jinheng (1, 2); Zhang, Yuanjie (1, 2); Xu, Huangrong (1, 2); Wu, Dengshan (1, 2); Yu, Weixing (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17, Xinxi Road, Xian; 710119, China; (2) Center of Mechanics Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yu, Weixing(yuwx@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:20
Issue date:September 26, 2022
Publication year:2022
Pages:36985-36995
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The bionic curved compound-eye camera is a bionic-inspired multi-aperture camera, which can be designed to have an overlap on the field of view (FOV) in between adjacent ommatidia so that 3D measurement is possible. In this work, we demonstrate the 3D measurement with a working distance of up to 3.2 m by a curved compound-eye camera. In that there are hundreds of ommatidia in the compound-eye camera, traditional calibration boards with a fixed-pitch pattern arrays are not applicable. A batch calibration method based on the CALTag calibration board for the compound-eye camera was designed. Next, the 3D measurement principle was described and a 3D measurement algorithm for the compound-eye camera was developed. Finally, the 3D measurement experiment on objects placed at different distances and directions from the compound-eye camera was performed. The experimental results show that the working range for 3D measurement can cover the whole FOV of 98° and the working distance can be as long as 3.2 m. Moreover, a complete depth map was reconstructed from a raw image captured by the compound-eye camera and demonstrated as well. The 3D measurement capability of the compound-eye camera at long working distance in a large FOV demonstrated in this work has great potential applications in areas such as unmanned aerial vehicle (UAV) obstacle avoidance and robot navigation.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:23
Main heading:Bionics
Controlled terms:Air navigation - Antennas - Calibration - Cameras - Robots - Unmanned aerial vehicles (UAV)
Uncontrolled terms:3-D measurement - Calibration method - Compound-eye camera - Field of views - Fixed pitches - Measurement algorithms - Measurement experiments - Multi aperture - Traditional calibration - Working distances
Classification code:431.5 Air Navigation and Traffic Control - 461.1 Biomedical Engineering - 652.1 Aircraft, General - 731.5 Robotics - 742.2 Photographic Equipment
Numerical data indexing:Size 3.20E+00m
DOI:10.1364/OE.473620
Funding details: Number: 61975231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61975231).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 247>
Accession number:20222412233237
Title:Research on a Bragg Rotation Mechanism of X-ray Monochromators with a Nanoradian Resolution
Title of translation:纳弧度分辨的X射线单色器布拉格转轴研究
Authors:Liu, Mengting (1, 3); Lei, Weizheng (2); Song, Li (2); Xia, Siyu (4); Feng, Liangjie (4); Dong, Xiaohao (1, 2); Wang, Jie (1, 2)
Author affiliation:(1) Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai; 201800, China; (2) Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai; 201204, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding authors:Dong, Xiaohao(dongxiaohao@zjlab.org.cn); Dong, Xiaohao(dongxiaohao@zjlab.org.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:5
Issue date:May 25, 2022
Publication year:2022
Article number:0551317
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The new-generation X-ray light sources based on accelerators, Diffraction-limited Storage Rings (DLSRs), and X-ray Free-electron Lasers (XFELs), have excellent properties such as high brightness, high coherence, and high collimation, which has enhanced important opportunities for scientific research and technological development. In the meantime, that brings a lot of challenges on the photon beam manipulation as well, the performance demand of optical components have been greatly improved, and at the same time, the attitude adjustment accuracy of optical components has generally entered the "micro/nano" range, such as the resolution of linear motion and angular rotation of optical components are supposed to reach a level of sub-nanometre and nanoradian. In the construction of the beamline, the monochromator is one of the core equipment to guarantee the optical performance of the beamline. In order to meet requirements of high stability and motion precision of beamline optics, for crystal monochromators in the new-generation light sources, a mechanism with a nano-radian angular resolution, driven by piezoelectric nano-displacement stages was developed. An optimized slider-crank mechanism is adopted for a large angle range of tens of degrees, so that a broader energy range can be covered with relatively big Bragg diffraction angles. This paper presents the main design parameters of the offset slider-crank mechanism for crystal monochromators according to the demand of energy range, the energy resolution and the required linear transmission ratio of X-ray crystal monochromator. By establishing a geometrical model of the slider-crank mechanism, it turns out that the transmission ratio between the linear displacement and the Sine of the Bragg angle depends solely on the crank rod length. Therefore, the length of crank rod can be determined according to the transmission ratio. At the same time, an optimized model of the offset slider-crank mechanism parameters is established in this paper, and the length of the connecting rod was determined according to achieving a high-precision linear transmission ratio in a large angle range. Finally, the precise angular displacement monitoring was carried out using a high-precision non-contact Fabry-Perot laser interferometer. The measurement errors of the high-precision angle measurement method are analyzed and it is found that the measurement errors can be ignored in the extremely small measurement range within an incremental step. The final results show that an angular resolution of 31.2 nrad can be achieved with a good linear relation of transmission, and the angular stability is better than 16 nrad within 800 seconds. The design of this mechanism has a great convenience for crystal'S adjustment of X-Ray monochromators, and it is conducive to techniques studies on an angular stability of nanoradians.<br/></div> © 2022, Science Press. All right reserved.
Number of references:17
Main heading:Angle measurement
Controlled terms:Diffraction - Electrons - Fabry-Perot interferometers - Free electron lasers - Laser interferometry - Light - Monochromators - Wigglers
Uncontrolled terms:Angle measurement methodology - Angular stability - Linear transmission - Linear transmission ratio - Measurement/methodology - Nanoradians resolution - Offset slide-crank mechanism - Optical components - Slider-crank mechanism - Transmission-ratio
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 743.2 Holographic Applications - 744.5 Free Electron Lasers - 744.9 Laser Applications - 932.1.1 Particle Accelerators - 941.3 Optical Instruments - 941.4 Optical Variables Measurements - 943.2 Mechanical Variables Measurements
Numerical data indexing:Time 8.00E+02s
DOI:10.3788/gzxb20225105.0551317
Funding details: Number: 2017SHZDZX02, Acronym: -, Sponsor: -;Number: 11935020,U1832172, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Foundation item：National Natural Science Foundation of China （Nos. 11935020，U1832172），Hundred-Talent Academy of Sciences（2018），Science and Technology Major Project of Shanghai（No.2017SHZDZX02）National Natural Science Foundation of China (Nos. 11935020, U1832172), Hundred-Talent Program of Chinese Academy of Sciences(2018), Science and Technology Major Project of Shanghai (No.2017SHZDZX02)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 248>
Accession number:20224913219872
Title:A large-format streak tube for compressed ultrafast photography
Authors:Li, Hang (1, 2, 3); Xue, Yanhua (1, 3); Tian, Jinshou (1, 3); Li, Shaohui (1, 3); Wang, Junfeng (1, 3); Chen, Ping (1, 3); Tian, Liping (1, 3, 4); He, Jianping (1, 3); Zhang, Minrui (1, 3); Liu, Baiyu (1, 3); Gou, Yongsheng (1, 3); Xu, Xiangyan (1, 3); Li, Yahui (1, 3); Xin, Liwei (1, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (4) School of Network and Communication Engineering, Jinling Institute of Technology, Nanjing; 211169, China
Corresponding author:Tian, Jinshou(tianjs@opt.ac.cn)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:93
Issue:11
Issue date:November 1, 2022
Publication year:2022
Article number:113303
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Streak cameras are powerful imaging instruments for studying ultrafast dynamics with the temporal resolution ranging from picosecond to attosecond. However, the confined detection area limits the information capacity of streak cameras, preventing them from fulfilling their potential in lidar, compressed ultrafast photography, etc. Here, we designed and manufactured a large-format streak tube with a large-size round-aperture gate, a spherical cathode, and a spherical screen, leading to an expanded detection area and a high spatial resolution. The simulation results show that the physical temporal resolution of the streak tube is better than 45 ps and the spatial resolutions are higher than 14 lp/mm in the whole area of 24 × 28 mm2 on the cathode. The experiments demonstrate the streak tube's application potential in weak light imaging benefiting from the imaging magnification of 0.79, a photocathode radiance sensitivity of 37 mA/W, a radiant emitting gain of 11.6 at the wavelength of 500 nm, and a dynamic range higher than 512:1. Most importantly, in the photocathode area of φ35 mm, the static spatial resolutions at the center and the edge along the slit (R = 16 mm) reach 32 and 28 lp/mm, respectively, and are higher than 10 lp/mm in the whole area of 24 × 28 mm2 on the cathode, allowing for a considerable capacity for spatial information.<br/></div> © 2022 Author(s).
Number of references:23
Main heading:Streak cameras
Controlled terms:High speed photography - Photocathodes
Uncontrolled terms:Attoseconds - Imaging instruments - Large-format - Picoseconds - Spatial resolution - Spherical cathodes - Streak tubes - Temporal resolution - Ultra-fast dynamics - Ultrafast photography
Classification code:714.1 Electron Tubes - 741.3 Optical Devices and Systems - 742.1 Photography - 742.2 Photographic Equipment
Numerical data indexing:Area 2.80E-05m2, Electric current 3.70E-02A, Size 1.60E-02m, Size 5.00E-07m, Time 4.50E-11s
DOI:10.1063/5.0105441
Funding details: Number: 52175433,GJJSTD20220006, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA25030900,XDA25031100, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work was supported, in part, by the Youth Innovation Promotion Association CAS under Grant No. 2021402, by the Strategic Priority Research Program of Chinese Academy of Sciences under Grant Nos. XDA25031100 and XDA25030900, by the National Natural Science Foundation of China under Grant No. 52175433, and by the Scientific Instrument Developing Project of the Chinese Academy of Sciences under Grant No. GJJSTD20220006.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 249>
Accession number:20223912795088
Title:Polarimetric Optical Imaging： Devices， Technologies and Applications （Invited）
Title of translation:偏振光学成像：器件，技术与应用（特邀）
Authors:Ren, Liyong (1, 2, 3); Liang, Jian (1, 2, 3); Qu, Enshi (2); Zhang, Wenfei (2, 4); Du, Bojun (5); Ma, Feiya (1, 3); Guo, Shaoben (1, 3); Zhang, Jin (1, 3)
Author affiliation:(1) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Xi'an Key Laboratory of Optical Information Manipulation and Augmentation （OMA）, Xi'an; 710119, China; (4) School of Physics and Optoelectronics Engineering, Shandong University of Technology, Shandong, Zibo; 255000, China; (5) Unit 63861 of PLA, Jilin, Baicheng; 137001, China
Corresponding author:Ren, Liyong
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:8
Issue date:August 2022
Publication year:2022
Article number:0851505
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Polarization is the fourth important "information dimension" parameter in addition to intensity， wavelength and phase to describe the basic properties of electromagnetic waves. The polarization characteristics of reflected or radiated light are closely related to its material， geometry， structure and surface roughness， and physicochemical properties. Polarimetric optical imaging is a novel optical imaging method based on detecting the polarization information of light， which takes advantages of the difference in polarization characteristics between the reflected light and the background stray light to improve the target imaging quality， increase the action distance， enhance the detection capability and the identification probability. As an effective complementary means to the intensity， spectral and infrared imaging methods， polarimetric optical imaging has important applications for target detection in complex background environments with low signal-to-noise ratio， strong scattering and low illumination environments. Based on the authors' years of research work in polarimetric optical imaging and detection， this paper provides a more detailed introduction to the research status of polarimetric optical imaging including the related devices， technologies and applications. We present a comprehensive analysis and introduction of the polarimetric optical imaging technology and camera， the development and the application status at home and abroad. There are mainly two types of the polarimetric optical imaging regimes， which include the division-of time polarimetric optical imaging system and the simultaneous polarimetric optical imaging system， the later one can be further classified into the division-of-amplitude system， the division-of-aperture system， and the division-of-focal-plane system. The Stoke matrix representation of polarized light closely related to polarimetric imaging and the basic imaging principle are briefly introduced. Some research works conducted by our research team in polarimetric camera development and polarimetric optical imaging detection are summarized in detail， involving the design and key devices as well as technologies of the division-of-aperture polarimetric imaging system， the information processing technologies and algorithms and applications of polarization image. To be more specific， we introduce a novel division-of-aperture chromatic polarimetric camera with full-polarization-state simultaneous detection， i.e.， including three linearly polarized states （0°，45°，and 90°） and one right circularly polarized state. We also introduce a division-of-aperture polarimetric lens with full-polarization-state simultaneous detection， which can be easily assembled to a commercial camera to change it into a polarimetric camera. We solve the image registration problem in division-of-aperture polarimetric camera by combining the phase-only correlation algorithm， the Speeded-up Robust Features （SURF） algorithm， and the Random Sample Consensus （RANSAC） algorithm. We propose a novel polarimetric optical imaging regime， namely the division-of-aperture simultaneous system based on the specifically designed color-polarizer filter， which is used for coding both the spectrum and the polarization. We report our research works on the polarimetric dehazing/descattering imaging for fog and/or underwater environments based on the optimization of the Angle of Polarization （AoP）， and the low-pass filter denoising. We also introduce image enhancement algorithms for target imaging， detection and/or identification， where the visible and the near-infrared polarimetric images are fused， or the high-resolution polarized images are reconstructed from the low-resolution polarized images， together with obtaining the high-resolution Degree of Polarization （DoP） image and the high-resolution AoP image. We show the physical model of the polarization 3D reconstruction imaging， together with its basic theory， method and the 3D imaging experimental results. We show some thoughts， suggestions and/or problems on the current techniques and development directions that need to be solved in polarimetric optical imaging research， which include the enhancement of the polarization measurement precision， the optimization design of the polarimetric optical imaging system， the advantages development/extension of the computational optical imaging techniques based on polarimetric image processing and optimization， and the applications of polarimetric optical imaging and detection techniques， etc.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:101
Main heading:Image fusion
Controlled terms:Cameras - Electromagnetic waves - Imaging systems - Light polarization - Optical image storage - Polarimeters - Radar imaging - Signal to noise ratio - Surface roughness - Thermography (imaging)
Uncontrolled terms:3D reconstruction - Angle of polarization - Angle of polarization （AoP） - Degree of polarization - Degree of polarization （DoP） - Dehazing - Division of aperture - Full polarization state - Images registration - Optical imaging - Polarimetric 3d reconstruction imaging - Polarimetric camera - Polarimetric dehazing - Polarimetric optical imaging
Classification code:711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 722.1 Data Storage, Equipment and Techniques - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 742.1 Photography - 742.2 Photographic Equipment - 746 Imaging Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 941.3 Optical Instruments
DOI:10.3788/gzxb20225108.0851505
Funding details: Number: 61505246, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: S15-002, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021JM-204,2022JQ-612, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 61505246）， Natural Science Foundation of Shaanxi Province （Nos. 2021JM-204， 2022JQ-612）， "135" Engineering Project of Chinese Academy of Sciences （No. S15-002）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 250>
Accession number:20223912808267
Title:Design and Experiment of Push-Broom Hyperspectral Microscopic Imaging System
Title of translation:推扫式高光谱显微成像系统设计与实验
Authors:Qi, Meijie (1); Liu, Lixin (1, 2); Li, Yanru (1); Liu, Yujie (1); Zhang, Zhoufeng (2); Qu, Junle (3)
Author affiliation:(1) School of Optoelectronic Engineering, Xidian University, Shaanxi, Xi'an; 710071, China; (2) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (3) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Guangdong, Shenzhen; 518060, China
Corresponding author:Liu, Lixin(lxliu@xidian.edu.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:20
Issue date:October 25, 2022
Publication year:2022
Article number:2007105
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective Hyperspectral microscopic imaging (HMI) technology combines optical microscopy and hyperspectral imaging to obtain both image and spectral information, thereby revealing spatial distribution and physical and chemical properties of a sample simultaneously. HMI, a novel nondestructive optical imaging technology, can be used to diagnose normal/cancerous tissues with high accuracy, sensitivity, and specificity. However, HMIs have a large amount of data and a complex data structure; thus, systematic and detailed data interpretation is required in cancer diagnosis. In this study, a push-broom HMI system is designed and developed, and the graphical user interface (GUI)-based software for system control, data acquisition, and data analysis is programmed to aid doctors in pathological diagnosis. The classification and staging of skin cancers (basal cell carcinoma, squamous cell carcinoma, and malignant melanoma) are studied on the basis of HMI technology and machine learning algorithms to confirm the performance of the system software. We hope that our HMI system, GUI-based software, and experimental results will be useful in cancer diagnosis and have application potential in biomedicine. Methods First, a push-broom HMI system consists of a halogen lamp, objective lens, sample stage, single-axis motorized translation stage, two-axis manual translation stage, hyperspectral line-scan camera, and other optical devices (Fig. 1). The halogen lamp illuminates the sample on the sample stage. The transmitted light is collected by the objective lens and directed to the hyperspectral camera after passing through the mirror and lens group in sequence to obtain one-dimensional (1D) spatial and spectral information. The motorized translation stage controls the sample stage to move in the x-direction with a step size of 1 μm for HMI data cube acquisition. The spectral resolution of the hyperspectral camera is calibrated and calculated based on the sensor configuration (Fig. 2). HMI system performance parameters, such as spatial resolution, field of view, and magnification, are obtained by imaging a resolution target. Second, the software with graphical user interfaces for system control, data acquisition, and data analysis is programmed using MATLAB. Several machine learning-based data processing methods are provided. Finally, the HMI data cubes of basal cell carcinoma, squamous cell carcinoma, and malignant melanoma tissues are obtained using the HMI system and data acquisition software; subsequently, the classification and staging of skin cancer are studied using data analysis software. Results and Discussions The push-broom HMI system has a spectral range of 465.5-905.1 nm, with a spectral resolution of ~3 nm, field of view of 400.18 μm×192.47 μm, system magnification of 28.15, and actual spatial resolution of 1.10-1.38 μm (Fig.3); it can collect a data cube of 2048 pixel×985 pixel×151. Additionally, GUI-based HMI data acquisition software and analysis software are designed and programmed using MATLAB. The data acquisition software includes the following three modules (Fig. 4): HMI system control and data acquisition module for controlling the hyperspectral camera and motorized translation stage, HMI data acquisition, light source background correction, and frequency domain filtering; HMI data display and processing module for displaying or cropping the HMI data cube and single-band image and calculating the correlation between each band; and save and exit module for saving the data processing results and exiting the acquisition software. The data analysis software consists of the following two modules (Fig. 5): a data extraction and viewing module that can realize HMI image display, spectrum viewing in the region of interest, converting 3D HMI data into 2D spectral data, and synthesizing RGB images with any three single-band images; and an HMI data processing module that can analyze image and spectral data and realize sample classification based on machine learning. HMI data from basal cell carcinoma, squamous cell carcinoma, and malignant melanoma are obtained to evaluate the performance of the system, and the machine learning is used to achieve the classification of three types of skin cancers and staging of squamous cell carcinoma. Spectral distribution, as well as 3D HMI, single-band, and RGB images, can be displayed (Fig. 6). The classification of three types of skin cancers based on image data is achieved using the data analysis software, and the highest classification accuracy of 85% and KAPPA value of 0.77 are obtained using color moment, gray-level co-occurrence matrix and local binary pattern as image features, partial least squares for dimensionality reduction, hold-out method for dividing the dataset, and a support vector machine models for classification. The optimal model for spectral data staging of squamous cell carcinoma corresponding to the standard normal variable transformation for spectral preprocessing, partial least squares for dimensionality reduction, hold-out method for dividing the dataset, and random forest for staging. The highest staging accuracy of 96.4% and a KAPPA value of 0.95 are obtained (Table 1). Conclusions In this study, a push-broom HMI system that can simultaneously obtain image and spectral information is developed to reveal spatial distribution and physicochemical properties of the samples. The HMI system can provide a data cube of 2048 pixel×985 pixel×151, a spectral resolution of ~3 nm, and actual spatial resolution of 1.10-1.38 μm. The HMI data acquisition software and analysis software are programmed using MATLAB. The graphical user interface of the software can standardize experiment procedures, allows intuitive data collection and processing, and provides analysis results, all of which can assist doctors in pathological diagnosis. Using this HMI system to image skin cancer tissues, high spectral and spatial resolution images are obtained, and the classification of different skin cancers and staging of squamous cell carcinomas can be achieved with high accuracy using machine learning algorithms. Our study shows that the combination of HMI technology and machine learning has significant application potential in the field of biomedicine.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:20
Main heading:MATLAB
Controlled terms:Application programs - Cameras - Cells - Chemical analysis - Computer aided diagnosis - Cytology - Data acquisition - Data handling - Dermatology - Digital storage - Diseases - Graphical user interfaces - Histology - Hyperspectral imaging - Learning algorithms - Learning systems - Machine learning - Tissue
Uncontrolled terms:Cancer diagnosis - Data cube - HyperSpectral - Hyperspectral microscopic imaging - Imaging data - Medical optics - Microscopic imaging - Skin cancers - Squamous cell carcinoma - Translation stage
Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 461.9 Biology - 722.1 Data Storage, Equipment and Techniques - 722.2 Computer Peripheral Equipment - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.4.2 Machine Learning - 723.5 Computer Applications - 742.2 Photographic Equipment - 746 Imaging Techniques - 921 Mathematics
Numerical data indexing:Percentage 8.50E+01%, Percentage 9.64E+01%, Size 1.00E-06m, Size 1.10E-06m to 1.38E-06m, Size 1.9247E-04m, Size 3.00E-09m, Size 4.0018E-04m, Size 4.655E-07m to 9.051E-07m
DOI:10.3788/CJL202249.2007105
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 251>
Accession number:20224713150657
Title:Exact optical path difference and complete performance analysis of a spectral zooming imaging spectrometer (Open Access)
Authors:Zhang, Xiangzhe (1); Huang, Liqing (2); Zhu, Jingping (1); Zhang, Ning (3); Zong, Kang (1); Zhai, Lipeng (2); Zhang, Yu (2); Cai, Yakun (4); Wang, Huimin (2)
Author affiliation:(1) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shaanxi Key Laboratory of Information Photonic Technique, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Non Equilibrium Condensed Matter and Quantum Engineering Laboratory, The Key Laboratory of Ministry of Education, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) College of Science, Henan University of Engineering, Zhengzhou; 451191, China
Corresponding author:Zhu, Jingping(jpzhu@xjtu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:22
Issue date:October 24, 2022
Publication year:2022
Pages:39479-39491
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The optical path difference (OPD) equations of the dual Wollaston prisms (DWP) with an adjustable air gap (AG) are derived by the wave normal tracing method, which is suitable for arbitrary incidence plane and angle. The spatial distribution of the OPD for various AG is presented. The validity of the OPD equation is verified by comparing the calculated interferograms with experimentally observed one. The performance of a novel static birefringent Fourier transform imaging spectrometer (SBFTIS) based on the DWP is investigated. The spectral resolution can be adjusted by changing the AG and the field of view can reach 10.0°, which is much larger than that predicted by our previous work. The results obtained in this article provide a theoretical basis for completely describing the optical transmission characteristic of the DWP and developing the high-performance birefringent spectral zooming imaging spectrometer.<br/></div> © 2022 Optica Publishing Group.
Number of references:22
Main heading:Light transmission
Controlled terms:Birefringence - Spectrometers
Uncontrolled terms:Air-gaps - Birefringents - Fourier transform imaging spectrometers - Imaging spectrometers - Interferograms - Optical path difference - Performance - Performances analysis - Tracing method - Wollaston prism
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1364/OE.468584
Funding details: Number: 2020GY-274, Acronym: -, Sponsor: -;Number: 62127813, Acronym: -, Sponsor: -;Number: 61890961, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018JM6008, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (61890961); Key R&D project in the Shaanxi Province of China (2020GY-274); National Key Research and Development Program of China (2018JM6008); National Major Scientific Instruments and Equipments Development Project of National Natural Science Foundation of China (62127813).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 252>
Accession number:20225113261003
Title:A 224-Gb/s Inverter-Based TIA with Interleaved Active-Feedback and Distributed Peaking in 28-nm CMOS for Silicon Photonic Receivers
Authors:Chen, Sikai (1, 2); Xue, Jintao (4, 5); Li, Leliang (2, 3); Li, Guike (2, 3); Zhang, Zhao (2, 3); Liu, Jian (2, 3); Liu, Liyuan (2, 3); Wang, Binhao (4, 5); Li, Yingtao (1); Qi, Nan (2, 3)
Author affiliation:(1) Lanzhou University, Lanzhou, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an, China; (3) University of Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, Beijing, China; (4) Institute of Semiconductors, Chinese Academy of Sciences, State Key Laboratory of Superlattices and Microstructures, Beijing, China; (5) School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Li, Yingtao(ytli@lzu.edu.cn)
Source title:Proceedings of 2022 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2022
Abbreviated source title:Proc. IEEE Int. Conf. Integr. Circuits, Technol. Appl., ICTA
Part number:1 of 1
Issue title:Proceedings of 2022 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2022
Issue date:2022
Publication year:2022
Pages:198-199
Language:English
ISBN-13:9781665492690
Document type:Conference article (CA)
Conference name:2022 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2022
Conference date:October 28, 2022 - October 30, 2022
Conference location:Xi'an, China
Conference code:184813
Sponsor:Beijing Institute of Electronics; IEEE MTT-S Nanjing Chapter
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">This paper presents the design and simulations of a 224-Gb/s inverter-based transimpedance amplifier (TIA) designed in 28-nm CMOS process. The co-design of the photodiode and CMOS TIA efficiently optimize the optical receiver. The TIA achieves the bandwidth enhancement with the distributed peaking and interleaved active-feedback (IAFB) technology. The simulations result show that the proposed TIA has 39-dBΩ transimpedance gain and 70-GHz bandwidth (BW). Overall, it achieves a clear 224-Gb/s PAM4 eye diagram. The total power consumption is 20.7mW at 0.9-V supply voltage. And the input referred noise current is 8.2uArms.<br/></div> © 2022 IEEE.
Number of references:5
Main heading:Operational amplifiers
Controlled terms:Bandwidth - CMOS integrated circuits - Electric inverters - Feedback amplifiers - Integrated circuit design - Optical receivers - Silicon photonics
Uncontrolled terms:Active feedback - Co-designs - CO-packaged optic - Design and simulation - Distributed peaking - Interleaved active feedback - Inverter-based - Photonic receiver - Silicon photonics - Transimpedance amplifier
Classification code:713.1 Amplifiers - 714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 717.2 Optical Communication Equipment - 741.1 Light/Optics
Numerical data indexing:Bit rate 2.24E+11bit/s, Frequency 7.00E+10Hz, Power 2.07E-02W, Size 2.80E-08m, Voltage 9.00E-01V
DOI:10.1109/ICTA56932.2022.9963090
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 253>
Accession number:20225113262617
Title:Phase retrieval algorithms: principles, developments and applications (invited)
Title of translation:相位恢复算法：原理、发展与应用 (特邀)
Authors:Wang, Aiye (1, 2, 3); Pan, An (1, 2); Ma, Caiwen (1, 2, 3); Yao, Baoli (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100094, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi’an; 710119, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:20220402
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Because the phase contains more information about the field in contrast to the amplitude, phase measurement has always been a hot topic in many branches of modern science and engineering. Within the visible range of electromagnetic wave, it is quite difficult to directly obtain phase information by the existing photodetectors. Phase retrieval provides an effective method to "figure out" the phase information from the captured intensity information, and has achieved successful applications in several scientific fields including astronomical observation, biomedical imaging and digital signal restoration. Algorithm is not only the core of phase retrieval, but is also the key to its development and applications. This paper demonstrates the basic principles of phase retrieval algorithms in combination with physical principles and signal processing methods, summarizes the development of various kinds of algorithms as well as their advantages and disadvantages, and briefly lists some typical applications in the field of optics. Finally, the challenges are pointed out, and the future development directions are described as: better convergence performance and noise robustness, phase-retrieval ability for more complex objects, compatibility for integration of multiple objectives and tasks.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:180
Main heading:Computational Imaging
Controlled terms:Computation theory - Electromagnetic waves - Medical imaging - Signal reconstruction - Site selection
Uncontrolled terms:Computational imaging - Development and applications - Hot topics - Modern engineering - Modern science - Optimization theory - Phase information - Phase retrieval - Phase retrieval algorithm - Signal-processing
Classification code:461.1 Biomedical Engineering - 711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 746 Imaging Techniques
DOI:10.3788/IRLA20220402
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 254>
Accession number:20230813622792
Title:Tracking Performance Detection Technology of Optical Measuring Equipment Based on Moving Platform
Title of translation:动 平 台 光 学 测 量 设 备 跟 踪 性 能 检 测 技 术
Authors:Li, Xiyu (1); Gao, Xin (1); Sun, Liangliang (1); Lei, Chengqiang (1); Shi, Heng (1, 2, 3, 4); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Pilot National Laboratory for Marine Science and Technology（Qingdao）, Shandong, Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin526@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:12
Issue date:2022
Publication year:2022
Article number:1212002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The optical measurement equipment has gradually expanded from ground-based to ship-borne，vehicle-mounted，and airborne platforms. At this stage，the traditional ground-based single axis dynamic detection device is used to detect the tracking performance of the optical measurement equipment with the moving platform，and its motion trajectory is relatively single. The motion equation components of the simulated target in the azimuth and pitch directions have high-order derivatives. Although the axis number for the detection target has been increased to three，there are still position blind spots in the workspace. It is impossible to truly simulate the 6-DOF（Degree of Freedom）motion characteristics of moving platform and typical maneuvering target.In order to test and evaluate the tracking performance of optical measuring equipment with a moving platform under ground conditions，a 6-DOF detection target and detection method are proposed. In view of the fact that the traditional kinematics modeling and trajectory planning methods of multi-DOF serial mechanisms need to establish six coordinate systems，the calculation process is cumbersome，and there are problems such as poor real-time performance and easy to appear motion singular solutions. A continuous and singularity free kinematic model of the detection target is established in a global way by using the screw exponential product method. The method only needs to establish the head and tail coordinate systems of the detection target，which can completely express the transformation relationship between joints，and it is convenient to solve the inverse kinematics. The fusion motion trajectory in real time and high precision is simulated and the operation efficiency is improved. Shipborne optical measuring equipment is a typical ship moving platform equipment. The XX-1109 shipborne optical measuring equipment is studied and its tracking performance is tested.According to the performance of the detection target and optical measurement equipment，the azimuth and pitch axes tracking random errors of the XX-1109 shipborne optical measurement equipment are calculated and analyzed to be 23.88″and 23.86″，respectively. The simulated optical target is installed at the end of the 6-DOF manipulator，and then a new 6-DOF detection system is constructed. The detection system is mainly composed of the simulated optical target， 6-DOF manipulator， operation control subsystem， data communication subsystem，time measurement terminal and data processing subsystem. The detection target adopts ABB 6-DOF manipulator IRB 6700-205，and its repeated positioning accuracy is 0.1 mm. The XX-1109 shipborne optical measurement equipment is deployed at a distance of about 5 meters from the detection target. The detection target simulates the movement track in real time. The XX-1109 tracks the simulated target in real time to achieve the detection and identification of tracking performance. By formulating a reasonable and feasible detection method，the tracking performance of XX-1109 optical measurement equipment is tested and evaluated. The test results show that the kinematics model of the detection target established by the screw exponential product method realizes the real-time high-precision trajectory planning of the ship moving platform and typical maneuvering targets，which improves the calculation efficiency and avoids the problem of motion singularity in traditional modeling methods. Considering the size of angular velocity and the randomness of error，the tracking random error of the XX-1109 optical measuring equipment is consistent with the theoretical analysis，which verifies the effectiveness and superiority of the new detection system and method. The tracking performance test of the optical measuring equipment with moving platform under the ground conditions is realized. The new detection system and method have successfully completed the detection and identification of the optical measurement equipment on shipborne，vehicle-mounted and airborne moving platforms. It can not only quickly find tracking performance problems in the development stage，but also reduce the development cycle and the cost，which has important engineering application value.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:14
Main heading:Manipulators
Controlled terms:Data handling - Degrees of freedom (mechanics) - Equations of motion - Maneuverability - Optical data processing - Real time systems - Ships - Trajectories
Uncontrolled terms:6 degree of freedom - 6-degree of freedom manipulator - Detection targets - Measuring equipments - Moving platform - Optical measurement - Optical measuring - Optical measuring equipment - Tracking performance - Trajectory planning algorithm
Classification code:722.4 Digital Computers and Systems - 723.2 Data Processing and Image Processing - 921.2 Calculus - 931.1 Mechanics
Numerical data indexing:Size 1.00E-04m, Size 5.00E+00m
DOI:10.3788/gzxb20225112.1212002
Funding details: Number: 2021406, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The Youth Innovation Promotion Association CAS Fund Project（No. 2021406），Key Laboratory of Space Precision Measurement Technology CAS Fund Project（No.29J21-063-III）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 255>
Accession number:20221111799465
Title:SAR Object Detection Encounters Deformed Complex Scenes and Aliased Scattered Power Distribution (Open Access)
Authors:Zhang, Yawei (1); Cao, Yu (2, 3, 4); Feng, Xubin (5); Xie, Meilin (5); Li, Xin (1); Xue, Yao (1); Qian, Xueming (6)
Author affiliation:(1) Xi'an Jiaotong University, School of Information and Communication Engineering, Xi'an; 710049, China; (2) Xi'an Jiaotong University, School of Electronic and Information Engineering, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Chinese Academy of Sciences, Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (5) Chinese Academy of Sciences, Space Precision Measurement Laboratory, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (6) Xi'an Jiaotong University, Ministry of Education Key Laboratory for Intelligent Networks and Network Security, School of Information and Communication Engineering, Smiles Lab, Xi'an; 710049, China
Corresponding author:Qian, Xueming(qianxm@mail.xjtu.edu.cn)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:15
Issue date:2022
Publication year:2022
Pages:4482-4495
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Synthetic aperture radar (SAR) is widely used in terrain classification, object detection, and other fields. Compared with anchor-based detectors, anchor-free detectors remove the anchor mechanism and implement detection box encoding in a more elegant form. However, anchor-free detectors are limited by complex scenes caused by geometric transformations, such as overlaying, shadow, vertex displacement during SAR imaging. And the scattered power distribution of noise is similar to the edge of the object, making it difficult for the detector to locate the edge of the SAR object accurately. In order to alleviate these problems, we propose a high-speed and high-performance SAR image anchor-free detector. First, we propose a shallow feature refinement (SFR) module to effectively extract and retain the detailed information of objects, while coping with deformed complex scenes. Second, we analyze the optimization focus of the detector at different training iterations and propose iteration-aware loss to guide the detector, making the detector more accurately locate the edge of the object disturbed by the noise scattered power distribution. Third, number estimation helps to detect objects with more flexible criteria in box selection without manual labor. Compared with mainstream optical object detectors and SAR dedicated detectors, our method achieves the best speed-accuracy tradeoff on the SAR-ship dataset, with 96.4% average precision when the value of intersection over union is 50% (AP_{50}) at 64.9 frames per second. The experimental results prove the effectiveness of our method.<br/></div> © 2008-2012 IEEE.
Number of references:61
Main heading:Object detection
Controlled terms:Synthetic aperture radar - Economic and social effects - Object recognition - Iterative methods - Mathematical transformations - Radar imaging
Uncontrolled terms:Aliasing - Anchor-free - Complex scenes - Feature refinement - Iteration-aware loss - Number estimation - Power distributions - Scattered power distribution aliasing - Shallow feature refinement - Synthetic aperture radar object detection
Classification code:716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 971 Social Sciences
Numerical data indexing:Percentage 5.00E+01%, Percentage 9.64E+01%
DOI:10.1109/JSTARS.2022.3157749
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 256>
Accession number:20222812339250
Title:Tailoring high-performance illumination lenses for extended non-Lambertian sources
Authors:Ding, Zhanghao (1); Shen, Fanqi (1); Liu, Yingli (1); Kuang, Cuifang (1); Zheng, Zhenrong (1); Jia, Shengnan (2); Cao, Liping (2); Mao, Xianglong (3); Wu, Rengmao (1)
Author affiliation:(1) State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou; 310027, China; (2) Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou; 310000, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wu, Rengmao(wrengmao@zju.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:20
Issue date:July 10, 2022
Publication year:2022
Pages:5934-5943
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A key challenge in tailoring compact and high-performance illumination lenses for extended non-Lambertian sources is to take both the étendue and the radiance distribution of an extended non-Lambertian source into account when redirecting the light rays from the source. We develop a direct method to tailor high-performance illumination lenses with prescribed irradiance properties for extended non-Lambertian sources. A relationship between the irradiance distribution on a given observation plane and the radiance distribution of the non- Lambertian source is established. Both edge rays and internal rays emanating from the extended light source are considered in the numerical calculation of lens profiles. Three examples are given to illustrate the effectiveness and characteristics of the proposed method. The results show that the proposed method can yield compact and high-performance illumination systems in both the near field and far field.<br/></div> ©2022 Optica Publishing Group
Number of references:22
Main heading:Light sources
Controlled terms:Molecular physics
Uncontrolled terms:Direct method - Etendue - Irradiance distribution - Lambertian source - Light rays - Numerical calculation - Observation planes - Performance - Property - Radiance distributions
Classification code:931.3 Atomic and Molecular Physics
DOI:10.1364/AO.461962
Funding details: Number: 2021XZZX020, Acronym: -, Sponsor: -;Number: 12074338,62022071, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. Fundamental Research Funds for the Zhejiang Provincial Universities (2021XZZX020); National Natural Science Foundation of China (12074338, 62022071).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 257>
Accession number:20224513057503
Title:Development of a flat-field-response, four-channel x-ray imaging instrument for hotspot asymmetry studies
Authors:Xu, Jie (1, 2); Zhang, Xing (3); Mu, Baozhong (1, 2); Chen, Liang (1, 2); Li, Wenjie (1, 2); Xu, Xinye (1, 2); Li, Mingtao (1, 2); Wang, Xin (1, 2); Dong, Jianjun (3); Wang, Feng (3); He, Junhua (4)
Author affiliation:(1) Key Laboratory of Advanced Micro-structured Materials, Ministry of Education, Tongji University, Shanghai; 200092, China; (2) School of Physics Science and Engineering, Tongji University, Shanghai; 200092, China; (3) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang; 621900, China; (4) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China
Corresponding authors:Mu, Baozhong(mubz@tongji.edu.cn); Wang, Feng(lfrc_wangfeng@163.com)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:93
Issue:10
Issue date:October 1, 2022
Publication year:2022
Article number:103545
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Here, we describe a flat-field-response, four-channel x-ray imaging instrument developed to study hotspot asymmetries in inertial-confinement fusion experiments. We discuss the details of its design and optical characterization, the diagnostic deployment of the device, and experiments with it. We achieved a spatial-response flatness better than ∼8.4% within a ±200 μm field of view (FOV), with a spatial resolution of ∼4 μm at the center of the FOV. We used the system to characterize the low-order asymmetry of the implosion hotspot, and we obtained improved results after adjustments to improve the irradiation symmetry. Due to the flat-field-response characteristic, the versatile instrument also has the potential to be applied to diagnostics for the hotspot electron temperature and the Rayleigh-Taylor instability.<br/></div> © 2022 Author(s).
Number of references:12
Main heading:Electron temperature
Controlled terms:Inertial confinement fusion
Uncontrolled terms:Field of views - Four-channel - Fusion experiments - Hotspots - Imaging instruments - Inertial-confinement fusions - Optical characterization - Spatial resolution - Spatial response - Xray imaging
Classification code:932.2.1 Fission and Fusion Reactions
Numerical data indexing:Percentage 8.40E+00%, Size 2.00E-04m, Size 4.00E-06m
DOI:10.1063/5.0106990
Funding details: Number: 12005157, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAEP, Sponsor: China Academy of Engineering Physics;
Funding text:The authors acknowledge the researchers and technicians of China Academy of Engineering Physics for their support and suggestions on the experimental scheme design. This work was supported by the National Natural Science Foundation of China (Grant No. 12005157).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 258>
Accession number:20221311863500
Title:Experimental Study on the Spatial Performance of Photorefractive X-ray Semiconductor Ultrafast Response Chip
Title of translation:光折变X射线半导体超快响应芯片空间性能的实验研究
Authors:Tan, Xiaobo (1); Yan, Xin (2); Yi, Tao (3); He, Kai (2); Shao, Zhengzheng (1); Zhou, Kaikai (1); Gao, Guilong (2); Wang, Tao (2); Zhang, Jun (1); Zhuang, Zhaowen (1)
Author affiliation:(1) College of Electronic Science and Technology, National University of Defense Technology, Changsha; 410073, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang; 621900, China
Corresponding author:Zhuang, Zhaowen(zhaowenzhuang@nudt.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:2
Issue date:February 25, 2022
Publication year:2022
Article number:0251215
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The traditional ultrafast electric vacuum devices are usually based on the mechanism of photoelectric conversion, and their performance is restricted by factors such as material response and space-charge effect. It is difficult for the devices like microchannel plate framing cameras, DIlation X-ray Imager (DIXI), streak cameras to achieve high temporal resolution (100 fs~1 ps) and spatial resolution (~μm) two-dimensional imaging. Ultrafast imaging technology based on photorefractive effect is a new ultrafast diagnostic technology, which has the advantages of high spatiotemporal resolution, all-optical, all-solid-state, and anti-radiation. The nonequilibrium carrier lifetime of low-temperature grown AlGaAs (LT-AlGaAs) can reach ps-level. The Ultrafast Response Chip (URC) made of LT-AlGaAs has the characteristics of high temporal resolution, meanwhile, good spatial performance is the other key factor for its application. In this paper, the spatial performance of LT-AlGaAs URC is experimentally studied using X-ray, generated by high-energy nanosecond pulsed laser-produced plasma, as the signal. The results show that the URC has the ability of high spatial resolution and large-scale imaging in the X-ray energy dynamic range of 120:1. The optimal spatial resolution is ≥ 35 lp/mm @ MTF = 0.1, and the imaging frame can reach 6.7 mm × 6.7 mm. The results further verify the feasibility of ultrafast diagnostic technology based on photorefractive materials. In the future, LT-AlGaAs URC will be combined with ultrafast framing technologies such as dispersion framing and polarization chirp framing to realize multi-frames and high spatiotemporal resolution two-dimensional imaging.<br/></div> © 2022, Science Press. All right reserved.
Number of references:23
Main heading:Aluminum gallium arsenide
Controlled terms:Temperature - Semiconductor alloys - Image resolution - Photoelectricity - Photoreactivity - Aluminum alloys
Uncontrolled terms:Dynamic range - High temporal resolution - Low-temperature grown - Photorefractive effects - Spatial performance - Spatial resolution - Ultra-fast - Ultrafast imaging - Ultrafast response - X-ray imaging
Classification code:541.2 Aluminum Alloys - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 712.1 Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 741.1 Light/Optics
Numerical data indexing:Size 6.70E-03m, Time 1.00E-12s, Time 1.00E-13s
DOI:10.3788/gzxb20225102.0251215
Funding details: Number: 51302316, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:item：National Natural Science Foundation of China（No. 51302316）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 259>
Accession number:20224413027528
Title:Design of Large Depth Field Photon Doppler Velocimeter and Application in Ultra-high Speed Interior Ballistic Research
Title of translation:大景深光子多普勒测速仪设计及高超试验应用
Authors:Hao, Geyang (1, 2); Luo, Qing (3); Yang, Yahan (4); Yan, Zhaochao (4); Wu, Guojun (1); Huang, Jie (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Sichuan, Mianyang; 621000, China; (4) Pilot National Laboratory for Marine Science and Technology （Qingdao）, Shandong, Qingdao; 266200, China
Corresponding author:Wu, Guojun(wuguojun@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:6
Issue date:June 1, 2022
Publication year:2022
Article number:0628002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The Photon Doppler Velocimeter （PDV） is a non-contact velocity measurement equipment with high accuracy and high-time resolution， which can obtain the continuous interior ballistic velocity of ultra-high-speed launchers. Continuous velocity data is very important for ultra-high-speed experiments. It can be used to understand the performance of ultra-high-speed launchers and the physical processes of ultra-high-speed， as well as to develop the theory of interior ballistics. Limited by the small size of the muzzle， the serious attenuation of laser energy and （the limitation of） the bandwidth of detector， it is difficult for ordinary PDV to obtain continuous ultra-high-speed interior ballistic velocity. In this paper， we have developed a large depth field PDV with an effective working distance greater than 7 m， which is constructed based on fiber Mach-Zehnder interferometer. The emission aperture of optical antenna is 25 mm， the beam waist of emission position is located at 3.3~3.4 m， and the diameter of beam waist is 1 245 mm. In order to verify the performance of the system， we first simulated the high-speed motion process by using a rotating turntable and a motor， and tested the measurement error of the PDV system. In the velocity range of 1~40 m/s， the measurement uncertainty of the PDV can be controlled at 2.48%. Then we carried out experiments on the ultra-high-speed ballistic target （FD-18A） of China Aerodynamics Research and Development Center （CARDC）， and repeatedly obtained the continuous ultra-high-speed inner ballistic velocity of the ultra-high-speed two-stage light gas guns. In the experiments， we placed a reflector directly behind the muzzle to change the direction of the laser signal and put the optical antenna on one side of the reflector. Finally， the PDV recorded the velocity changes of the launch model from static acceleration to about 2 km/s and 7 km/s， with the maximum velocity of 6.89 km/s. By comparing with the numerical simulation results， it is found that the measured velocity of experiment is lower than the simulation velocity in the test with a velocity of 2 km/s. While the measured velocity of experiment is higher than the simulation speed in the test with a velocity of 7 km/s， and the deviations are -20.11%， -23.7% and +9.15%， respectively. Through the analysis of velocity-acceleration data， it is found that the difference in friction between simulation and experiment may be the main reason for the difference of velocity. The actual friction force of the ultra-high-speed projectile in the ballistic target is greater than the theoretical friction force given in the simulation， so it may cause that the maximum speeds and accelerations are lower than the theoretical results in the test with an estimated launch velocity of 2 km/s. In the test with a velocity of 7 km/s， the mass of the projectile decreases rapidly due to severe friction， so the maximum velocity and acceleration in the second half of the movement are gradually larger than the simulation results.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:16
Main heading:Photons
Controlled terms:Ballistics - Doppler effect - Light - Physical optics - Reflection - Uncertainty analysis - Velocity - Velocity measurement
Uncontrolled terms:Doppler velocimeter - Interior ballistic - Interior ballistic velocity - Laser Doppler effect - Optical antennas - Performance - Photon dopple velocimeter - Two-stage light gas gun - Ultra high speed - Ultra-high speed two-stage light gas gun
Classification code:404.1 Military Engineering - 741.1 Light/Optics - 922.1 Probability Theory - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 943.3 Special Purpose Instruments
Numerical data indexing:Electric current -1.80E+01A, Percentage -2.011E+01%, Percentage -2.37E+01%, Percentage 2.48E+00%, Percentage 9.15E+00%, Size 2.45E-01m, Size 2.50E-02m, Size 3.30E+00m to 3.40E+00m, Size 7.00E+00m, Velocity 1.00E00m/s to 4.00E+01m/s, Velocity 2.00E+03m/s, Velocity 6.89E+03m/s, Velocity 7.00E+03m/s
DOI:10.3788/gzxb20225106.0628002
Funding details: Number: XDA22030201, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018SDKJ0200, Acronym: QNLM, Sponsor: Polit National Laboratory for Marine Science and Technology;
Funding text:Marine Science & Technology Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology（Qingdao） （No.2018SDKJ0200）， the Strategic Priority Research Program （A） of the Chinese Academy of Sciences （No. XDA22030201）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 260>
Accession number:20221511947080
Title:Enhancement of the radiation resistance of cerium-containing fluorophosphate glasses through codoping with Sb<inf>2</inf>O<inf>3</inf> and Bi<inf>2</inf>O<inf>3</inf>
Authors:Zhang, Faqiang (1, 2); Cao, Xin (1, 2); Ma, Yuan (1, 2); Zhang, Zhijun (1); Huo, Weirong (3); Wan, Rui (1, 2); Yang, Liqing (1); Gao, Fei (1); Wang, Pengfei (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu; 611731, China
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:48
Issue:14
Issue date:July 15, 2022
Publication year:2022
Pages:20041-20052
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The growing demand for radiation-resistant optical glasses for space and nuclear radiation applications has attracted significant research interest. However, radiation-resistant fluorophosphate glasses have been poorly studied. In this work, we report on the tailoring and performance of radiation-resistant fluorophosphate glasses that contained cerium through codoping with Sb<inf>2</inf>O<inf>3</inf> and Bi<inf>2</inf>O<inf>3</inf>. The physical properties, optical properties, microstructure, and defects of fluorophosphate glasses were investigated using transmittance measurements, absorption measurements, as well as Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) spectroscopy. The results showed that the radiation resistance of all codoped fluorophosphate glasses was better than the undoped cerium-containing fluorophosphate glasses after 10–250 krad(Si) irradiation. Especially in glasses doped with Bi<inf>2</inf>O<inf>3</inf>, the optical density increment at 385 nm was only 0.1482 after 250 krad(Si) irradiation. The CeO<inf>2</inf> prevented the development of phosphate-related oxygen hole center (POHC) defects, whereas further codoping with Bi<inf>2</inf>O<inf>3</inf> suppressed the formation of oxygen hole center (OHC) and POEC defects, reducing the breaking of phosphate chains caused by CeO<inf>2</inf>. Bi<sup>3+</sup> is more likely than Sb<sup>3+</sup> to change the valence, affecting the transition equilibrium of intrinsic defects and reducing the concentration of defects produced by irradiation. When codoping with Sb<inf>2</inf>O<inf>3</inf> and Bi<inf>2</inf>O<inf>3</inf>, Bi<inf>2</inf>O<inf>3</inf> does not enhance radiation resistance owing to the scission effect of Sb<inf>2</inf>O<inf>3</inf> on the phosphate chain, which is not conducive to the radiation resistance of glasses. This indicates that the cerium-containing fluorophosphate glasses doped with Bi<inf>2</inf>O<inf>3</inf> can effectively suppress the defects caused by irradiation and improve the radiation resistance of the glasses.<br/></div> © 2022 Elsevier Ltd and Techna Group S.r.l.
Number of references:52
Main heading:Bismuth compounds
Controlled terms:Antimony compounds - Glass - Electron spin resonance spectroscopy - Paramagnetic resonance - X ray photoelectron spectroscopy - Defects - Oxygen - Irradiation - Optical properties
Uncontrolled terms:Co-doping - Fluorophosphate glass - Gamma irradiation - Growing demand - Intrinsic defects - Oxygen hole centres - Phosphate chain - Radiation resistance - Radiation resistant - Space radiations
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 801 Chemistry - 804 Chemical Products Generally - 812.3 Glass - 951 Materials Science
Numerical data indexing:Absorbed dose 1.00E+04Gy to 2.50E+05Gy, Absorbed dose 2.50E+05Gy, Size 3.85E-07m
DOI:10.1016/j.ceramint.2022.03.280
Funding details: Number: 61775235, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017446, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-219,2021GY-251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC No: 61775235 ), Shaanxi Provincial Key Research and Development Program ( 2021GY-219 , 2021GY-251 ), and Youth Innovation Promotion Association of the Chinese Academy of Sciences, CAS ( 2017446 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 261>
Accession number:20223512630818
Title:Intelligent detection method for seeding timing in sapphire processing
Authors:Cao, Jingyang (1, 2); Qiao, Tiezhu (1, 2); Zhang, Haifeng (3); Yan, Gaowei (4); Dong, Huijie (1)
Author affiliation:(1) Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan; 030024, China; (2) College of Optoelectronics, Taiyuan University of Technology, Taiyuan; 030024, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan; 030024, China
Corresponding author:Dong, Huijie(donghuijie@tyut.edu.cn)
Source title:Measurement: Journal of the International Measurement Confederation
Abbreviated source title:Meas J Int Meas Confed
Volume:201
Issue date:September 30, 2022
Publication year:2022
Article number:111745
Language:English
ISSN:02632241
CODEN:MSRMDA
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In sapphire processing by the Kyropoulos method, the detection of seeding timing is the core technology. Existing detection methods are incapable of tracking spoke feature motion on the liquid surface and cannot effectively guide sapphire seeding. Therefore, this paper proposes an innovative visual-perturbation-velocity-fitting method for sapphire seeding timing detection. First, the concept of perturbation velocity, which can reflect the flow state of the melt surface, is presented. Then, the position of spoke feature points is obtained by computer vision and calculated by multi-frame interactive periodic detection. The fitting function model corresponding to the perturbation velocity in different flow states is established. Finally, the seeding timing is determined by the transition of the flow state and the stability of the flow. The experimental results show that the proposed method can improve the seeding success rate from 76.7% to 93.3% and the average successful seeding time from 5.6 h to 4.5 h.<br/></div> © 2022 Elsevier Ltd
Number of references:27
Main heading:Sapphire
Controlled terms:Computer vision - Feature extraction - Timing circuits - Velocity
Uncontrolled terms:Core technology - Detection methods - Feature motion - Flow state - Intelligent detection methods - Kyropoulos methods - Liquid surface - Perturbation velocity - Seeding timing - Visual-perturbation-velocity-fitting
Classification code:482.2.1 Gems - 713.4 Pulse Circuits - 723.5 Computer Applications - 741.2 Vision
DOI:10.1016/j.measurement.2022.111745
Funding details: Number: 61973226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: U1810121, Acronym: -, Sponsor: National Natural Science Foundation of China-Shanxi Joint Fund for Coal-Based Low-Carbon Technology;
Funding text:This work was supported by the National Natural Science Foundation of China-Shanxi coal-based low-carbon joint fund (Grant No. U1810121) and the National Natural Science Foundation of China (No. 61973226).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 262>
Accession number:20230413452163
Title:Frequency Control of Laser Cavity Solitons for Metrological Applications
Authors:Cutrona, Antonio (1); Rowley, Maxwell (1); Bendahmane, Abdelkrim (1); Hanzard, Pierre-Henry (1); Peters, Luke (1); Cecconi, Vittorio (1); Olivieri, Luana (1); Little, Brent E. (2); Chu, Sai T. (3); Morandotti, Roberto (4); Moss, David J. (5); Totero-Gongora, Juan Sebastian (1); Peccianti, Marco (1); Pasquazi, Alessia (1)
Author affiliation:(1) Emergent Photonics (Epic) Lab., Dept. of Physics and Astronomy, University of Sussex, BN1 9QH, United Kingdom; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (3) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@sussex.ac.uk)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:Nonlinear Photonics, NP 2022
Issue date:2022
Publication year:2022
Article number:NpTh1G.1
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:Nonlinear Photonics, NP 2022
Conference date:July 24, 2022 - July 28, 2022
Conference location:Maastricht, Netherlands
Conference code:185840
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We show the free-running frequency stability and the frequency control of a micro-comb system comprising a micro-ring nested into an amplifying fibre cavity.<br/></div> © Optica Publishing Group 2022.
Number of references:9
Uncontrolled terms:Cavity solitons - Fiber cavity - Free running frequency - Metrological applications - Microrings
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 263>
Accession number:20224513093567
Title:Context and Difference Enhancement Network for Change Detection (Open Access)
Authors:Song, Dawei (1, 2); Dong, Yongsheng (3, 4); Li, Xuelong (3, 4)
Author affiliation:(1) Chinese Academy of Sciences, Shaanxi Key Laboratory of Ocean Optics, Xi'An Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, School of Optoelectronics, Beijing; 100049, China; (3) Northwestern Polytechnical University, School of Artificial Intelligence, OPtics and ElectroNics (IOPEN), Xi'an; 710072, China; (4) Ministry of Industry and Information Technology, Key Laboratory of Intelligent Interaction and Applications (Northwestern Polytechnical University), Xi'an; 710072, China
Corresponding author:Li, Xuelong(li@nwpu.edu.cn)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:15
Issue date:2022
Publication year:2022
Pages:9457-9467
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">At present, convolution neural networks have achieved good performance in remote sensing image change detection. However, due to the locality of convolution, these methods are difficult to capture the global context relationships among different-level features. To alleviate this issue, we propose a context and difference enhancement network (CDENet) for change detection, which can strongly model global context relationships and enhance the change difference. Specifically, our backbone is the dual TransUNet, which is based on U-Net and equipped with transformer block in the encoder. The dual TransUNet is used to extract bitemporal features. Then, the features are encoded as the input sequence, which is conducive to modeling the global context. Moreover, we design the content difference enhancement module to process the dual features of each layer in the encoder. The designed module can increase the spatial attention of difference regions to enhance the change difference features. In the decoder, we adopt a simple cross-layer feature fusion to combine the upsampled features with the high-resolution features, which is used to generate more accurate results. Finally, we adopt a novel loss to supervise the accuracy of results in regions and pixels. The experiments on two public change detection datasets demonstrate that our CDENet has strong competitiveness and performs better than the state-of-the-art methods.<br/></div> © 2008-2012 IEEE.
Number of references:62
Main heading:Semantics
Controlled terms:Change detection - Convolution - Data mining - Feature extraction - Image enhancement - Job analysis - Learning systems - Remote sensing - Signal encoding
Uncontrolled terms:Change detection - Content difference enhancement - Context models - Convolution neural network - Features extraction - Global context - Remote-sensing - Task analysis - Transformer
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
DOI:10.1109/JSTARS.2022.3217082
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 264>
Accession number:20224713157120
Title:QPSK to BPSK modulation format conversion by phase-sensitive parametric amplification in multi-slot waveguides
Authors:Wu, Xiao (1); Li, Xuefeng (2); Ren, Li (1); Liu, Hongjun (3, 4)
Author affiliation:(1) School of Electronic Engineering, Xi’an University of Posts Telecommunications, Xi’an; 710121, China; (2) School of Science, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Li, Xuefeng(lixfpost@163.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:32
Issue date:November 10, 2022
Publication year:2022
Pages:9609-9615
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The optical modulation conversion of a quadrature phase-shift keying (QPSK) signal to two binary phase-shift keying (BPSK) signals is theoretically realized in a phase-sensitive amplification (PSA) conversion system. We propose a multi-slot silicon-carbon nanotube/polydimethylsiloxane hybrid waveguide to achieve high nonlinearity of 10<sup>8</sup> W<sup>−1</sup> m<sup>−1</sup> for improving PSA performance. Constellation diagrams, error vector magnitude, and bit error rate (BER) are used to investigate and measure the performance of the output. The results show that the converted BPSK signal has more than a 10 dB higher signal-to-noise ratio than the QPSK signal with a BER threshold of 10<sup>−3</sup>. Furthermore, the system has great potential for hierarchical modulation of advanced format signals and long-distance transmission.<br/></div> © 2022 Optica Publishing Group.
Number of references:28
Main heading:Quadrature phase shift keying
Controlled terms:Binary phase shift keying - Bit error rate - Carbon nanotubes - Phase shift - Signal to noise ratio - Waveguides
Uncontrolled terms:Binary phase-shift keying modulations - Binary phase-shift keying signals - Bit-error rate - Modulation format conversions - Multi-slots - Parametric amplification - Performance - Phase-sensitive - Phase-sensitive amplifications - Quadrature phase-shift keying
Classification code:714.3 Waveguides - 716.1 Information Theory and Signal Processing - 723.1 Computer Programming - 761 Nanotechnology - 933.1 Crystalline Solids
Numerical data indexing:Decibel 1.00E+01dB, Power 8.00E+00W, Size 1.00E00m
DOI:10.1364/AO.472444
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 265>
Accession number:20224012836419
Title:Transformer-based factorized encoder for classification of pneumoconiosis on 3D CT images
Authors:Huang, Yingying (1, 2, 3); Si, Yang (4, 5); Hu, Bingliang (3); Zhang, Yan (6); Wu, Shuang (6); Wu, Dongsheng (6, 7); Wang, Quan (1, 3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key laboratory of Biomedical Spectroscopy, Shanxi, Xi'an; 710119, China; (4) Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, Department of Neurology, Sichuan, Chengdu, China; (5) University of Electronic Science and Technology of China, Sichuan, Chengdu, China; (6) Department of Radiology, West China School of Public Health and West China Fourth Hospital, Sichuan University, Sichuan, Chengdu, China; (7) Research Center of Artificial Intelligence in Medicine, West China-PUMC C.C. Chen Institute of Health, Sichuan University, Sichuan, Chengdu, China
Corresponding authors:Wu, Dongsheng(wdshxsy@163.com); Wang, Quan(wangquan@opt.ac.cn)
Source title:Computers in Biology and Medicine
Abbreviated source title:Comput. Biol. Med.
Volume:150
Issue date:November 2022
Publication year:2022
Article number:106137
Language:English
ISSN:00104825
E-ISSN:18790534
CODEN:CBMDAW
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In the past decade, deep learning methods have been implemented in the medical image fields and have achieved good performance. Recently, deep learning algorithms have been successful in the evaluation of diagnosis on lung images. Although chest radiography (CR) is the standard data modality for diagnosing pneumoconiosis, computed tomography (CT) typically provides more details of the lesions in the lung. Thus, a transformer-based factorized encoder (TBFE) was proposed and first applied for the classification of pneumoconiosis depicted on 3D CT images. Specifically, a factorized encoder consists of two transformer encoders. The first transformer encoder enables the interaction of intra-slice by encoding feature maps from the same slice of CT. The second transformer encoder explores the inter-slice interaction by encoding feature maps from different slices. In addition, the lack of grading standards on CT for labeling the pneumoconiosis lesions. Thus, an acknowledged CR-based grading system was applied to mark the corresponding pneumoconiosis CT stage. Then, we pre-trained the 3D convolutional autoencoder on the public LIDC-IDRI dataset and fixed the parameters of the last convolutional layer of the encoder to extract CT feature maps with underlying spatial structural information from our 3D CT dataset. Experimental results demonstrated the superiority of the TBFE over other 3D-CNN networks, achieving an accuracy of 97.06%, a recall of 89.33%, precision of 90%, and an F1-score of 93.33%, using 10-fold cross-validation.<br/></div> © 2022 Elsevier Ltd
Number of references:50
Main heading:Grading
Controlled terms:Biological organs - Computerized tomography - Convolution - Deep learning - Diagnosis - Image classification - Learning algorithms - Learning systems - Medical imaging - Signal encoding
Uncontrolled terms:3d computed tomographies - 3d convolutional autoencoder - Auto encoders - Chest radiography - Computed tomography images - Encodings - Feature map - Inter-slice interaction - Intra-slice interaction - Transformer-based factorized encoder
Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 461.4 Ergonomics and Human Factors Engineering - 461.6 Medicine and Pharmacology - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 723.4.2 Machine Learning - 723.5 Computer Applications - 746 Imaging Techniques
Numerical data indexing:Percentage 8.933E+01%, Percentage 9.00E+01%, Percentage 9.333E+01%, Percentage 9.706E+01%
DOI:10.1016/j.compbiomed.2022.106137
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 266>
Accession number:20222612275425
Title:Zoom optical system design for an acousto-optic tunable filter camera assisted by programming multidimensional analysis
Authors:Gao, Duorui (1, 2); Li, Tianlun (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Physical Electronics and Devices of Ministry of Education, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Gao, Duorui(gaoduorui@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:19
Issue date:July 1, 2022
Publication year:2022
Pages:5592-5598
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A medium infrared 12× continuous zoom optical system serving for an acousto-optic tunable filter spectral camera has been designed covering a 25–300 mm zooming range. Instead of relying on past experience for roughly determining the initial optical structure, a simulation programming based on Gaussian principle has been composed via MATLAB to accurately calculate the initial designing parameters, which is confirmed to be extremely close to the optimized results using Zemax. The relative design results have been multidimensionally analyzed in detail, which offers fresh thinking for future zoom optical design covering broadband operation wave band.<br/></div> © 2022 Optica Publishing Group
Number of references:15
Main heading:Optical design
Controlled terms:Cameras - MATLAB - Optical systems
Uncontrolled terms:Acoustooptic tunable filters (AOTF) - Broadband operation - Continuous zooms - Gaussians - Multi-dimensional analysis - Optical structures - Optical system designs - Simulation programming - Spectral cameras - Zoom optical system
Classification code:723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 921 Mathematics
Numerical data indexing:Size 2.50E-02m to 3.00E-01m
DOI:10.1364/AO.461525
Funding details: Number: xzy022021039, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. Fundamental Research Funds for the Central Universities (xzy022021039).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 267>
Accession number:20223612692465
Title:Development and Prospect of Stray Light Suppression and Evaluation Technology（Invited）
Title of translation:杂 散 光 抑 制 与 评 估 技 术 发 展 与 展 望（特 邀）
Authors:Wang, Hu (1, 2, 3); Chen, Qinfang (1); Ma, Zhanpeng (1, 2); Yan, Haoyu (1, 2); Lin, Shangmin (1, 2); Xue, Yaoke (1, 4, 5)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanism, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (4) Youth Innovation Promotion Association, Chinese Academy of Sciences, Beijing; 100037, China; (5) Beijing University of Aeronautics and Astronautics, Beijing; 100191, China
Corresponding author:Wang, Hu(wanghu@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751406
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">With the rapid development of space optical technology and the continuous improvement of the performance of photoelectric detection devices， remote sensing systems with high resolution，multispectral，and low detection threshold are more and more widely used in aviation，aerospace and other fields. And the capabilities and evaluation indicators for the stray light suppression of electric-optic load are gradually becoming stricter. The stray light suppression technology and simulation analysis has become one of the indispensable links. Although the domestic stray light suppression and evaluation technology have developed earlier，a systematic method is still needed to lead the development of this technology to change the current research status of decentralization and fragmentation. Therefore，it is necessary to establish an integrated stray light suppression and evaluation method system，and conduct in-depth research in four key technical modules，including the formulation of stray light suppression scheme，suppression model surface characteristic measurement and modeling，stray light suppression effect simulation，and stray light test and evaluation and so on. Based on the theory of stray light radiation transfer，we give the corresponding suppression methods according to the stray light inside and outside the field of view，and the internal thermal radiation stray light. But the actual stray light sources are complex and in various forms，often requiring various suppression methods together，such as selecting the configuration of the optical system，setting the baffle and vanes，adding the stops，coating the optical surface，and blackening the surface of the structural parts. In addition，in some specific cases，filtering method，adjacent frame subtraction method，polarization method，numerical aperture method，and image correction method can also be used to suppress stray light. Opto-mechanical systems are generally composed of various surfaces with different materials and properties and they have different characteristics such as reflection，scattering，and absorption. Therefore，studying the surface characteristics of the system is the basis for stray light analysis. The measurement of surface properties can be used as a preliminary method to obtain the surface information of the material. On this basis，modeling calculations can be performed to make up for the deficiency that the experimental measurement cannot obtain any direction of incidence and observation. It can be widely promoted and applied in engineering. Computer simulation is an important means of stray light analysis，which can solve the problems of too cumbersome and high testing costs for stray light experiments in optical systems with high suppression ratios，and improve the efficiency of stray light analysis. The Monte Carlo method has been widely used in a variety of commercial software due to its high accuracy and computational simplicity.With the rapid development of computer technology and the emergence of new algorithms，the number，speed，and accuracy of ray tracing will be improved. It can more accurately simulate the influence of stray light on the whole system. Stray light measurement is the key to the final determination and verification of the system’s true stray light suppression capability. The measurement methods of stray light have formed two evaluation methods. The veiling glare index is suitable for general optical systems with low precision and small aperture，and the point source transmittance method is suitable for optical systems with large aperture and high stray light suppression ratio requirements. Xi’an Institute of Optics and Precision Mechanism of the Chinese Academy of Sciences has developed the first domestic point source transmittance stray light test device with the strongest capability of testing. It has been successfully applied to the stray light measurement of space equipped with high accuracy and served many scientific institutes and universities. This paper gives a set of the overall technical route and provides the idea for better promoting the development and application of stray light suppression and evaluation technology.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:188
Main heading:Stray light
Controlled terms:Distribution functions - Light sources - Numerical methods - Optical remote sensing - Optical systems - Surface properties
Uncontrolled terms:Bidirectional reflectance distribution functions - Evaluation methods - Ghost image - Measurements of - Point source transmittance - Point-sources - Stray light suppression - Suppression method - Suppression technology - Surface characteristics
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 921.6 Numerical Methods - 922.1 Probability Theory - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.3788/gzxb20225107.0751406
Funding details: Number: 2021YFC2202100,2021YFC2202104,2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:item： National Key Research and Development Program of China（ Nos.2021YFC2203501， 2021YFC2202104， 2021YFC2202100 ）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 268>
Accession number:20221912073737
Title:RF and microwave photonic signal generation and processing based on Kerr micro-combs
Authors:Sun, Yang (1); Tan, Mengxi (2); Wu, Jiayang (1); Xu, Xingyuan (3); Li, Yang (1); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Electronics Engineering, Beijing University of Posts and Telecommunications, Beijing, China; (4) Department of Physics, City University of Hong Kong, Hong Kong; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 110015, China; (6) INRS -Énergie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12000
Part number:1 of 1
Issue title:Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XV
Issue date:2022
Publication year:2022
Article number:120000C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510648715
Document type:Conference article (CA)
Conference name:Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XV 2022
Conference date:February 20, 2022 - February 24, 2022
Conference location:Virtual, Online
Conference code:178732
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a radio frequency (RF) phase-encoded signal generator as well as a user-defined RF arbitrary waveform generator (AWG) based on a soliton crystal micro-comb generated by an integrated MRR with a free spectral range of ~49 GHz. Owing to the soliton crystal's robust and stable generation as well as the high intrinsic efficiency, RF phase-encoded signal generators and AWGs with simple operation and fast reconfiguration are realized. The soliton crystal micro-comb provides 60 wavelengths for RF phase-encoded signal generators, achieving a phase encoding speed of 5.95 Gb/s and a high pulse compression ratio of 29.6. Over 80 wavelengths are employed for the AWGs, achieving tunable square waveforms with a duty cycle ratio ranging from 10% to 90%, sawtooth waveforms with tunable slope ratios from 0.2 to 1, and symmetric concave quadratic chirp waveforms. Our system has great potential to achieve RF and microwave photonic signal generation and processing with low cost and footprint.<br/></div> © 2022
Number of references:92
Main heading:Signal generators
Controlled terms:Microwave resonators - Optical resonators - Microwave photonics - Solitons
Uncontrolled terms:Arbitrary waveform generation - Encoded signals - Microring Resonator (MRR) - Microwave Photonics - Radio frequency arbitrary waveform generation - Radio frequency phase-encoded signal generation - Radio microwaves - Radiofrequencies - Signal generation
Classification code:714 Electronic Components and Tubes - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Bit rate 5.95E+09bit/s, Frequency 4.90E+10Hz, Percentage 1.00E+01% to 9.00E+01%
DOI:10.1117/12.2607905
Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327,DP190101576,DP190102773, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: -, Sponsor: Canada Research Chairs;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program (grant numbers DP150104327, DP190102773 and DP190101576) and the Swinburne ECR-SUPRA program. RM acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic and Discovery Grants Schemes, by the MESI PSRSIIRI Initiative in Quebec, and by the Canada Research Chair Program.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 269>
Accession number:20223412601244
Title:Investigating on Wideband Phase-Modulation to Amplitude-Modulation Conversion Based on Chromatic Dispersion in Fiber (Open Access)
Authors:Jin, Ya (1, 2); Chen, Yinfang (3); Xie, Zhuang (1, 2); Xu, Changda (1, 2); Zhu, Huatao (4); Zhu, Ninghua (1)
Author affiliation:(1) Chinese Academy of Sciences, State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Beijing; 100083, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (4) National University of Defense Technology, College of Information and Communication, Wuhan; 430010, China
Corresponding author:Zhu, Huatao(zhuhuatao2008@163.com)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:14
Issue:4
Issue date:August 1, 2022
Publication year:2022
Article number:5546205
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We investigate on the wideband phase-modulation to amplitude-modulation (PM-AM) conversion based on the chromatic dispersion in fiber. To overcome the shortcomings of the single-tone or dual-tone modulation-based model in previous researches, we present a more intuitive time-frequency analysis method for the propagation of phase-modulated signals in dispersive fibers, and give the physical picture for the temporal waveform changes. By analyzing the amplitude variation near the transition zone, we establish a bit-by-bit correspondence between the pulse waveforms and the actual modulated data, and realized the non-return-to-zero (NRZ) differential phase-shift keying (DPSK) demodulation. Furthermore, the effect of fiber length and bit rate on PM-AM conversion is also investigated quantitatively and experimentally.<br/></div> © 2009-2012 IEEE.
Number of references:16
Main heading:Demodulation
Controlled terms:Amplitude modulation - Chromatic dispersion - Optical fiber communication - Optical fibers - Optical signal processing - Optical variables measurement - Phase shift - Phase shift keying
Uncontrolled terms:Differential phase-shift keying - In-fiber - Non-return-to-zero - Non-return-to-zero differential phase-shift keying demodulation - Optical fiber dispersion - Optical-fiber communication - Phase-modulation to amplitude-modulation conversions - Return-to-zero differential phase-shift keying - Wide-band - Wideband phase
Classification code:711.1 Electromagnetic Waves in Different Media - 717.1 Optical Communication Systems - 741.1.2 Fiber Optics - 941.4 Optical Variables Measurements
DOI:10.1109/JPHOT.2022.3197209
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 270>
Accession number:20221912084173
Title:Infrared dim and small target detection: A review
Title of translation:红外弱小目标检测方法综述
Authors:Han, Jinhui (1); Wei, Yantao (2); Peng, Zhenming (3); Zhao, Qian (1); Chen, Yaohong (4); Qin, Yao (5); Li, Nan (1)
Author affiliation:(1) College of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou; 466001, China; (2) Faculty of Artificial Intelligence in Education, Central China Normal University, Wuhan; 430079, China; (3) School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu; 611731, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Northwest Institute of Nuclear Technology, Xi'an; 710024, China
Corresponding author:Wei, Yantao(yantaowei@mail.ccnu.edu.cn)
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:4
Issue date:April 25, 2022
Publication year:2022
Article number:20210393
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared dim and small target detection systems can be installed into a wide range of platforms, and has important practical value in the fields of infrared early warning, guidance and so on. However, it is challenging to detect dim and small target in complex background due to the low signal to noise ratio and radical change of background. Consequently, dim and small target detection in complex background is hotspot and hard pot of related field. In this paper, the previous works on IR dim and small target detection were divided into single-frame based (including methods based on local information and nonlocal information) and multi-frame based (including methods based on associated checking and directed calculation), and further the principles, advantages and drawbacks of these methods were analyzed. Finally, the comments and predictions on the development of IR dim and small target detection in the future were provided. Our work is not only a tutorial for the beginner in terms of current works and development trends, but also a reference for other researchers.<br/></div> Copyright ©2022 Infrared and Laser Engineering. All rights reserved.
Number of references:147
Main heading:Signal to noise ratio
Uncontrolled terms:Dim target - Frame-based - Infrared dim and small target - Multi-frame - Multi-frame based algorithm - Single frames - Single-frame based algorithm - Small targets - Targets detection
Classification code:716.1 Information Theory and Signal Processing
DOI:10.3788/IRLA20210393
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 271>
Accession number:20223012391078
Title:Design of cryogenic long-wave infrared detection system (Open Access)
Authors:Hongwei, Zhang (1, 2, 3); Weining, Chen (3); Rui, Qu (3); Yingjun, Ma (3); Yalin, Ding (1); Haifeng, Xu (4)
Author affiliation:(1) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Anhui Province Key Laboratory of Cryogenic Technologies, The 16th Institute, CETC, Hefei; 230088, China
Corresponding author:Weining, Chen(chenweining501@163.com)
Source title:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2295
Part number:1 of 1
Issue:1
Issue date:2022
Publication year:2022
Article number:012008
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:5th International Conference on Circuits, Systems and Devices, ICCSD 2021
Conference date:October 30, 2021 - November 2, 2021
Conference location:Chengdu, China
Conference code:180563
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">To address the demand for detection of point / dim targets in complex environments, a cryogenic long-wave infrared detection system was designed. In order to improve the target detection capability, the system adopts high-order aspheric surfaces to reduce the number of optical lenses and improve the system transmittance. At the same time, it corrects on-axis / off-axis aberrations and advanced aberrations to improve the imaging quality of the system. In order to effectively reduce the background radiation and improve the system signal-to-noise ratio, the system adopts cryogenic optical technology. Through the scheme design and calculation analysis of the active refrigeration unit, the requirements of the overall and optical technical indicators are met. The outline of the aircraft image obtained by the field experiment is clear and distinguishable, which meets the requirements of target detection. The system has a good application prospect in the field of infrared imaging in early warning systems.<br/></div> © Published under licence by IOP Publishing Ltd.
Number of references:10
Main heading:Thermography (imaging)
Controlled terms:Aberrations - Aircraft detection - Cryogenics - Infrared devices - Infrared radiation - Lenses - Signal to noise ratio
Uncontrolled terms:Complex environments - Detection capability - Detection system - Dim target - High-order aspheric surfaces - Infrared detection - Longwave infrared - On-axis - Optical lens - Targets detection
Classification code:644.4 Cryogenics - 716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography
DOI:10.1088/1742-6596/2295/1/012008
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 272>
Accession number:20222312193194
Title:Noise reduction and 3D image restoration of single photon counting LiDAR using adaptive gating (Open Access)
Title of translation:基于光子计数激光雷达的自适应门控抑噪及三维重建算法 (Open Access)
Authors:Chen, Song-Mao (1, 2, 4); Su, Xiu-Qin (1, 2); Hao, Wei (1, 2); Zhang, Zhen-Yang (1, 2, 3); Wang, Shu-Chao (1, 2, 3); Zhu, Wen-Hua (1, 2, 3); Wang, Jie (1, 2, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Pilot National Laboratory for Marine Science and Technology, Joint Laboratory of ocean observation and detection (Xi'an Institute of Optics and Precision Mechanics), Qingdao; 266200, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding authors:Hao, Wei(hwei@opt.ac.cn); Hao, Wei(hwei@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:10
Issue date:May 20, 2022
Publication year:2022
Article number:104202
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Single photon LiDAR is considered as one of the most important tools in acquiring target information with high accuracy under extreme imaging conditions, as it offers single photon sensitivity and picosecond timing resolution. However, such technique sense the scene with the photons reflected by the target, thus resulting in severe degradation of image in presence of strong noise. Range gating with high-speed electronics is an effective way to suppress the noise, unfortunately, such technique suffers from manually selecting the parameters and limited gating width. This paper presents a target information extracting and image restoration method under large observation window, which first obtain the depth distribution of the target and extract the information within the range by analyzing the model of signal and noise, then further improve the image quality by adopting advanced image restoration algorithm and henceforth shows better results than those denoising method that purely relying on hardware. In the experiment, photon-per-pixel (PPP) was as low as 3.020 and signal-to-background ratio (SBR) was as low as 0.106, the proposed method is able to improve SBR with a factor of 19.330. Compared to classical algorithm named cross correlation, the reconstruction signal to noise ratio (RSNR) increased 33.520dB by further cooperating with advanced image restoration algorithm, thus improved the ability of sensing accurate target information under extreme cases.<br/></div> Copyright © 2022 Acta Physica Sinica. All rights reserved.
Number of references:21
Main heading:Particle beams
Controlled terms:Image denoising - Image enhancement - Image reconstruction - Noise abatement - Optical radar - Photons - Restoration - Signal to noise ratio
Uncontrolled terms:3D-images - Image restoration algorithms - Image restoration4 - Noise reduction3 - Photon counting - Photon counting LiDAR2 - Signal-to-background ratio - Single photon imaging1 - Single photons - Target information
Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 751.4 Acoustic Noise - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Decibel 3.352E+01dB
DOI:10.7498/aps.71.20211697
Funding details: Number: GQRC-19-19, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020M683600, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:* Project supported by the China Postdoctoral Science Foundation (Grant No. 2020M683600), the Strategic High Technology Innovation Project of the Chinese Academy of Sciences (Grant No. GQRC-19-19), the Youth Innovation Promotion Association XIOPM-CAS, and the self determined project of Pilot national laboratory for marine science and technology (Qingdao). † Corresponding author. E-mail: hwei@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 273>
Accession number:20221712039946
Title:Simulation of the impact of using a novel neutron conversion screen on detector time characteristics and efficiency (Open Access)
Authors:Liu, Yiheng (1, 2, 3); He, Kai (1); Wang, Gang (1, 2); Gao, Guilong (1); Yan, Xin (1); Xue, Yanhua (1); Chen, Ping (1, 3); Yao, Dong (1); Yue, Mengmeng (1); Sheng, Liang (4); Yuan, Xiaohui (5); Tian, Jinshou (1, 3)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (4) The Northwest Institute of Nuclear Technology, Xi'an; 710024, China; (5) Key Laboratory for Laser Plasmas (MoE), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China
Corresponding authors:He, Kai(hekai@opt.ac.cn); Tian, Jinshou(tianjs@opt.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:12
Issue:4
Issue date:April 1, 2022
Publication year:2022
Article number:045206
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">To directly measure the DT neutrons from inertial confinement fusion with a high time resolution, a new type of neutron conversion composed of a CH2 conversion layer, a metal moderation layer, and a CsI secondary electron emission layer is proposed. The conversion screen is based on the principle that recoil protons produced by elastic scattering of the neutrons in CH2 interact with CsI to generate secondary electrons. The moderation layer can filter the energy spectrum of protons to prevent low-energy protons from reaching CsI, which shortens the duration of the secondary electron pulse and improves the temporal resolution of the conversion screen. Based on the Monte Carlo method, both the neutron impulse and background γ-rays response of this conversion screen were calculated. The simulation indicates that the temporal resolution of the conversion screen can reach up to 4.9 ps when the thickness of the gold layer is 100 μm. The detection efficiency of secondary electrons/neutrons can reach 7.4 × 10-3. The detection efficiency of the neutron conversion screen for secondary electrons/γ-rays is an order of magnitude lower than the neutron impulse response, and the response time of γ-rays is 20 ps earlier than the neutron pulses. This means that using this conversion screen is beneficial to distinguish between neutrons and γ-rays and has a good signal-to-noise ratio.<br/></div> © 2022 Author(s).
Number of references:23
Main heading:Neutrons
Controlled terms:Impulse response - Gamma rays - Secondary emission - Cesium iodide - Monte Carlo methods - Electrons - Signal to noise ratio
Uncontrolled terms:Conversion layers - Detection efficiency - DT neutron - Higher time resolution - Inertial-confinement fusions - Secondary electron emissions - Secondary electrons - Temporal resolution - Time characteristics - Time efficiencies
Classification code:716.1 Information Theory and Signal Processing - 804 Chemical Products Generally - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Size 1.00E-04m, Time 2.00E-11s, Time 4.90E-12s
DOI:10.1063/5.0073025
Funding details: Number: 12075312,62005311,XAB2020YN10, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA25030900), the National Natural Science Foundation of China (Grant Nos. 12075312 and 62005311), the CAS "Light of West China" Program (Grant No. XAB2020YN10), and the Youth Innovation Promotion Association CAS (Grant No. 2021402).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 274>
Accession number:20223512662277
Title:Laser Cavity-Solitons and Turing Patterns Microcombs: the Interaction of Slow and Fast Nonlinearities
Authors:Pasquazi, Alessia (1); Rowley, Maxwell (1); Hanzard, Pierre Henry (1); Cutrona, Antonio (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5); Moss, David J. (6); Gongora, Juan Sebastian Totero (1); Peccianti, Marco (1)
Author affiliation:(1) Emergent Photonics (Epic) Lab, Dept. of Physics and Astronomy, University of Sussex, BN1 9QH, United Kingdom; (2) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (4) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology, Chengdu, China; (6) Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@sussex.ac.uk)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:CLEO: Science and Innovations, S and I 2022
Issue date:2022
Publication year:2022
Article number:JM3A.2
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, S and I 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:181730
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Slow nonlinearities are critical in microresonator-based frequency combs, regulating essential phenomena, from stability to soliton starting and formation. We discuss their effect in a microresonator-filtered fiber laser.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:6
Main heading:Microresonators
Controlled terms:Fiber lasers - Solitons
Uncontrolled terms:Cavity solitons - Frequency combs - Micro resonators - Microcombs - Turing patterns
Classification code:741.1 Light/Optics - 744.4 Solid State Lasers - 744.7 Laser Components
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 275>
Accession number:20223512663251
Title:Laser Cavity-Solitons and Turing Patterns Microcombs: the Interaction of Slow and Fast Nonlinearities
Authors:Pasquazi, Alessia (1); Rowley, Maxwell (1); Hanzard, Pierre Henry (1); Cutrona, Antonio (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5); Moss, David J. (6); Gongora, Juan Sebastian Totero (1); Peccianti, Marco (1)
Author affiliation:(1) Emergent Photonics (Epic) Lab, Dept. of Physics and Astronomy, University of Sussex, BN1 9QH, United Kingdom; (2) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (4) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology, Chengdu, China; (6) Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@sussex.ac.uk)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:CLEO: QELS_Fundamental Science, QELS 2022
Issue date:2022
Publication year:2022
Article number:JM3A.2
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:CLEO: QELS_Fundamental Science, QELS 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:181727
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Slow nonlinearities are critical in microresonator-based frequency combs, regulating essential phenomena, from stability to soliton starting and formation. We discuss their effect in a microresonator-filtered fiber laser.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:6
Main heading:Microresonators
Controlled terms:Fiber lasers - Solitons
Uncontrolled terms:Cavity solitons - Frequency combs - Micro resonators - Microcombs - Turing patterns
Classification code:741.1 Light/Optics - 744.4 Solid State Lasers - 744.7 Laser Components
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 276>
Accession number:20224413024351
Title:Design and Optimization of Image Slicer in Coherent Dispersive Spectrometer
Title of translation:相干色散光谱仪中像切分器的设计与优化
Authors:Wang, Yidong (1, 2); Wei, Ruyi (1, 2, 3, 4); Xie, Zhengmao (1); Zhang, Kai (5); Chen, Shasha (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Electronic Information, Wuhan University, Wuhan; 430064, China; (4) Spectroscopy and Imaging Instrument Engineering Technology Research Center of Hubei Province, Wuhan; 430064, China; (5) Nanjing Institute of Astronomical Optics & Technology of Chinese Academy of Sciences, Nanjing; 210042, China
Corresponding author:Wei, Ruyi(ruyiwei@whu.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:9
Issue date:September 2022
Publication year:2022
Article number:0922002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Image slicer is an important optical device in astronomical observation spectrometer. It can effectively improve the resolution and energy transmittance of the instrument. The image slicer can divide the circular image spot into strips and arrange the strips in a straight line， so that all the image spots can pass through the spectrometer slit. Image slicers are commonly used in astronomical observation spectrometers to help instruments achieve high spectral resolution with medium apertures. Image slicers can be divided into 4 categories according to their working principles. Among them， Bowen-Walraven type is the most widely used image slicer type. Coherent dispersive spectroscopy is a technique that combines an interferometer and an intermediate resolution spectrometer. It measures the phase change of the interference fringes of the stellar spectral lines after the Doppler frequency shift， and calculates the radial velocity change of the star and the mass of the planet. Since the phase difference has a certain amplification factor relative to the wavelength offset， when the spectral resolution is the same， the radial velocity detection accuracy of the coherent dispersion technique can be greatly improved compared with the traditional echelle grating method.This paper is based on the coherent dispersive spectrometer used to detect exoplanets by the radial velocity method. The radial velocity detection accuracy is expected to be less than 1 m/s， and the detection target is K/M dwarf stars. The structure of the coherent dispersion spectrometer consists of collimating mirror， Sagnac interferometer， imaging mirror group， image slicer， relay mirror group， slit， dispersion grating and CCD. The working spectral range of the spectrometer is 660~900 nm， the system transmittance at the center wavelength is about 0.4， and the spectral resolution is 0.03 nm. In order to meet the requirements of energy utilization and spectral resolution， the system needs to use the image slicer to realize the target surface multiplexing of the CCD and the reasonable matching of the numerical aperture. Therefore， setting a reasonable number of segmented images and the F number of the imaging lens group to achieve a good segmentation effect is of great significance to the improvement of system performance.In order to reduce the influence of imaging defects on the system， two design schemes of the image slicer are modeled and calculated in this paper. This paper also studies the relationship between the thickness of the reflective cavity and the incident angle and the defocusing and object point repetition， and deduces the general design formula of the thickness of the optical reflective cavity， which provides an important reference for the design of the image slicer. In addition， for the coherent dispersive spectrometer system used for exoplanet detection， this paper simulates the defocus and object point repetition under different F numbers and segmentation numbers. By analyzing the simulation results， the following conclusions are obtained： 1） With the increase of the F number and the number of divisions， the defocus amount increases significantly， and the defocus phenomenon becomes more obvious. 2） The phenomenon of object point repetition appears in all simulation results， which is determined by the design principle and cannot be avoided. 3） The design results of the two design schemes are relatively similar. Since the optical path in the Bowen⁃Walraven type design is propagated through the glass medium， the defocus amount is larger than that of the simplified type. The ratio of the diffuse spot diameter to the image spot diameter is the same for both methods. Based on the comprehensive simulation effect， and considering the requirements of the coherent dispersion spectrometer system， it can be considered that the imaging defects are relatively balanced and the energy loss is less when the star image is divided into 4 under the condition of F/24， which is a relatively suitable solution. In addition， since the defocus amount of the simplified type is smaller， and only the flat mirror needs to be processed， the cost is lower， so the simplified design scheme can be adopted.The work of this paper plays an important role in achieving the expected performance of the instrument， and provides a reference and application reference for other high-resolution spectrometers to determine system parameters. At the same time， the work of this paper provides a general design idea for Bowen⁃Walraven and simplified image slicer design， which is instructive for optimizing the design process of image slicer.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:15
Main heading:Spectrometers
Controlled terms:Dispersion (waves) - Energy utilization - Image enhancement - Image segmentation - Mirrors - Spectral resolution - Stars - Velocity
Uncontrolled terms:Bowen-walraven image slice - Coherent dispersion spectrometer - Defocus amount - Dispersion spectrometers - Dispersive spectrometers - F/number - Image slices - Radial velocity - Transmittance
Classification code:525.3 Energy Utilization - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 3.00E-11m, Size 6.60E-07m to 9.00E-07m, Velocity 1.00E00m/s
DOI:10.3788/gzxb20225109.0922002
Funding details: Number: 11727806, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No. 11727806）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 277>
Accession number:20221511959683
Title:Underwater imaging system of pulse modulated lidar
Title of translation:脉冲调制激光雷达水下成像系统
Authors:Xu, Guoquan (1); Li, Guangying (2); Wan, Jianwei (1); Xu, Ke (1); Dong, Guangyan (3); Cheng, Guanghua (4); Wang, Xing (2); Han, Wenjie (3); Ma, Yanxin (5)
Author affiliation:(1) College of Electronic Science and Technology, National University of Defense Technology, Changsha; 410073, China; (2) State Key Laboratory of Ultrafast Diagnosis Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) The 27th Research Institute of China Electronics Technology Group Corporation, Zhengzhou; 450047, China; (4) Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710072, China; (5) College of Meteorology and Oceanography, National University of Defense Technology, Changsha; 410073, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:3
Issue date:March 25, 2022
Publication year:2022
Article number:20210204
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">According to the application of underwater target detection, the corresponding 532 nm wavelength lidar system parameters were given. Combining the advantages of streak tube lidar and subcarrier modulated lidar, a prototype of underwater 3D imaging extended range lidar was designed. Compared with the common scheme of microwave modulated laser to generate high frequency pulse, the prototype adopted Q-switch technology to compress laser pulse, and then combined the characteristics of F-P cavity to generate high frequency laser pulse, which had the advantages of high peak power and high output energy. The experimental results show that the imaging distance of the prototype in clear water environment is better than 20 m, and it can capture the target details with a diameter of 9 mm at 13 m. In the turbid water environment, the range-extended capability of signal processing is 81.4%, and the range resolution error is 0.01 m. The experimental results provide a foundation for further improving the imaging range and resolution of underwater lidar and developing underwater imaging equipment.<br/></div> Copyright ©2022 Infrared and Laser Engineering. All rights reserved.
Number of references:14
Main heading:Optical radar
Controlled terms:Underwater imaging - Imaging systems - Laser pulses - Underwater acoustics
Uncontrolled terms:High resolution - Lidar systems - Pulse modulated - Range-extended - Streak tubes - Sub-carriers - Systems parameters - Underwater 3D imaging - Underwater target detection - Water environments
Classification code:716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 746 Imaging Techniques - 751.1 Acoustic Waves
Numerical data indexing:Percentage 8.14E+01%, Size 1.00E-02m, Size 1.30E+01m, Size 2.00E+01m, Size 5.32E-07m, Size 9.00E-03m
DOI:10.3788/IRLA20210204
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 278>
Accession number:20222512252426
Title:An end-to-end laser-induced damage change detection approach for optical elements via siamese network and multi-layer perceptrons (Open Access)
Authors:Kou, Jingwei (1, 2); Zhan, Tao (3); Wang, Li (2); Xie, Yu (4); Zhang, Yihui (2); Zhou, Deyun (1); Gong, Maoguo (5)
Author affiliation:(1) School of Electronics and Information, Northwestern Polytechnical University, Xi'an; 710072, China; (2) The Advanced Optical Instrument Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, School of Computer Science and Technology, Xidian University, Xi'an; 710071, China; (4) School of Computer and Information Technology, Shanxi University, Taiyuan; 030006, China; (5) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, School of Electronic Engineering, Xidian University, Xi'an; 710071, China
Corresponding author:Zhou, Deyun(dyzhounpu@nwpu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:13
Issue date:June 20, 2022
Publication year:2022
Pages:24084-24102
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">With the presence of complex background noise, parasitic light, and dust attachment, it is still a challenging issue to perform high-precision laser-induced damage change detection of optical elements in the captured optical images. For resolving this problem, this paper presents an end-to-end damage change detection model based on siamese network and multi-layer perceptrons (SiamMLP). Firstly, representative features of bi-temporal damage images are efficiently extracted by the cascaded multi-layer perceptron modules in the siamese network. After that, the extracted features are concatenated and then classified into changed and unchanged classes. Due to its concise architecture and strong feature representation ability, the proposed method obtains excellent damage change detection results efficiently and effectively. To address the unbalanced distribution of hard and easy samples, a novel metric called hard metric is introduced in this paper for quantitatively evaluating the classification difficulty degree of the samples. The hard metric assigns a classification difficulty for each individual sample to precisely adjust the loss assigned to the sample. In the training stage, a novel hard loss is presented to train the proposed model. Cooperating with the hard metric, the hard loss can up-weight the loss of hard samples and down-weight the loss of easy samples, which results in a more powerful online hard sample mining ability of the proposed model. The experimental results on two real datasets validate the effectiveness and superiority of the proposed method.<br/></div> © 2022 Optica Publishing Group
Number of references:44
Main heading:Damage detection
Controlled terms:Change detection - Geometrical optics - Laser damage - Network layers
Uncontrolled terms:Background noise - Change detection - Complex background - Detection approach - End to end - High-precision - Laser-induced damage - Multilayers perceptrons - Optical image - Parasitics
Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 744.8 Laser Beam Interactions
DOI:10.1364/OE.460417
Funding details: Number: 62103311,62005077, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (62005077, 62103311).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 279>
Accession number:20221912096717
Title:Cross-modality Multi-encoder Hybrid Attention U-Net for Lung Tumors Images Segmentation
Title of translation:用于肺部肿瘤图像分割的跨模态多编码混合注意力U-Net
Authors:Zhou, Tao (1, 2); Dong, Yali (1); Liu, Shan (1); Lu, Huiling (3); Ma, Zongjun (4); Hou, Senbao (1); Qiu, Shi (5)
Author affiliation:(1) School of Computer Science and Technology, North Minzu University, Yinchuan; 750021, China; (2) The Key Laboratory of Images & Graphics Intelligent Processing of State Ethnic Affairs Commission, North Minzu University, Yinchuan; 750021, China; (3) School of Science, Ningxia Medical University, Yinchuan; 750004, China; (4) Department of Orthopedics, Ningxia Medical University General Hospital, Yinchuan; 750004, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Dong, Yali(dongyali_dyl@163.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:4
Issue date:April 25, 2022
Publication year:2022
Pages:368-384
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The lung lesions segmentation in medical imaging is an important task. However, there are still some challenges. The lesions delineation relies on manual segmentation by experienced clinicians, which is time-consuming and labor-intensive due to the complex anatomical structure of the human body; Lung tumor images have the characteristics of low contrast, different size and shape of the lesions, and variable location of the lesions, and are characterized by unbalanced data distribution. U-Net can segment lesions under a small number of datasets and has been widely used in medical image segmentation of lesions and organs. However, U-Net has the following three problems. First, U-Net uses uniform parameters for each feature map. For lesions of different sizes and complex shapes, the network may have poor spatial perception, which leads to the decline of segmentation performance. Second, U-Net channel dimension doubles with the number of down-sampling, and the feature map of the encoder layer is concatenated to the decoding layer through skip connection. However, in the segmentation task, the importance of different channels to the segmentation task is different. Third, most of the current multi-encoder segmentation networks extract the features of the single-modal target slice and their continuous slices to improve the network segmentation performance, but ignore the ability of different modal medical images to express the characteristics of the lesion. To solve the above problems, this paper proposes the MEAU-Net network to extract complementary features of multi-modals images. First, for the unbalanced data distribution, the Hough transform is used to detect the line of the lung Computed Tomography (CT) image marked by the doctor to obtain the region of interest, and cropped image size from 356 pixel×356 pixel to 50 pixel×50 pixel. Then, for the low contrast of medical image, use exposure fusion image contrast enhancement method improves the contrast between lesion and the background of lung CT image. To extract the features of lesions in multi-modal medical images, this paper proposes a multi-encoder hybrid attention mechanism network MEAU-Net. Positron Emission Tomography (PET) images provide metabolic information of lesions, CT images provide anatomical information of lesions, and Positron Emission Tomography/ Computed Tomography (PET/CT) images combine their advantages and utilize their complementarity and redundancy. MEAU-Net encoder path includes three branches of PET/CT, PET and CT, which are used to extract corresponding modal image features. In the skip connection of the network, hybrid attention mechanism is used, including spatial attention mechanism and channel attention mechanism. The features of PET/CT and CT are used in the spatial attention mechanism to emphasize key areas in the feature map and suppress irrelevant background. The channel attention mechanism extracts the weight value of each channel for the three branches of PET/CT, CT and PET, and then selects the maximum weight value after the three branches sigmoid to multiply the corresponding channel, and assign a higher value to the important channel. The weighting coefficient realizes the selection of important channels. The network inputs the feature map through the hybrid attention mechanism into the corresponding decoder layer, so that the network focuses on the lesion part in medical image, suppresses useless background information, and achieves accurate segmentation of the image lesion. Finally, for the semantic features of different scales of the decoding path, this paper uses a multi-scale feature aggregation block to perform feature mapping on the features of the decoding path, and refine the segmentation of the lesion. We compared our model with 4 classical segmentation model on our dataset, including SegNet, Attention Unet and Wnet. The experiment results show that our model uses multi-modal medical image features to effectively segment lung lesions with complex shapes, and outperforms all other methods in our dataset. The average DSC, Recall, VOE and RVD of MEAU-Net segmentation results are 96.4%, 97.27%, 7.0% and 6.94%, respectively.<br/></div> © 2022, Science Press. All right reserved.
Number of references:29
Main heading:Pixels
Controlled terms:Medical imaging - Redundancy - Signal encoding - Computerized tomography - Positron emission tomography - Hough transforms - Deep learning - Feature extraction - Image segmentation - Biological organs - Complex networks - Positrons - Tumors - Image enhancement
Uncontrolled terms:Attention mechanisms - Computed tomography images - Deep learning - Feature map - Lung tumor - Medical image segmentation - Multimodal medical images - Positron emission tomography/computed tomographies - Three-branch - U-net
Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 722 Computer Systems and Equipment - 723.5 Computer Applications - 746 Imaging Techniques - 921.3 Mathematical Transformations
Numerical data indexing:Percentage 6.94E+00%, Percentage 7.00E+00%, Percentage 9.64E+01%, Percentage 9.727E+01%
DOI:10.3788/gzxb20225104.0410006
Funding details: Number: 2022AAC03149, Acronym: -, Sponsor: -;Number: 2020KYQD08, Acronym: -, Sponsor: -;Number: 2020BEB04022, Acronym: -, Sponsor: Key Research and Development Program of Ningxia;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Ningxia Province;
Funding text:Foundation item：Natural Science Foundation of China （No. 62062003），Key Research and Development Project of 2020BEB04022），North Minzu University Research Project of Talent Introduction（No. 2020KYQD08），Natural Science Ningxia（No.2022AAC03149）Natural Science Foundation of China (No. 62062003), Key Research and Development Project of Ningxia (No. 2020BEB04022), North Minzu University Research Project of Talent Introduction (No. 2020KYQD08), Natural Science Foundation of Ningxia (No.2022AAC03149)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 280>
Accession number:20224513088976
Title:Picosecond Pulsed Laser Deposition Technique to Fabricate Zinc-Oxide Thin Films Through Burst Mode
Title of translation:基于脉冲串模式的ZnO 薄膜皮秒激光脉冲沉积技术
Authors:Wu, Enli (1, 2); Dai, Shoujun (1, 2, 3); Xuan, Xinxiang (4); He, Jianguo (1, 2, 3); Liu, Yang (1, 2, 3); Tan, Yu (5); Mo, Zeqiang (1, 2, 3); Yu, Jin (1, 2)
Author affiliation:(1) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing; 100094, China; (4) No. 3 Research Institute, China Electronics Technology Group Corporation, Beijing; 100015, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China
Corresponding author:Yu, Jin(jinyu@aoe.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:6
Issue date:March 25, 2022
Publication year:2022
Article number:0603003
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective Pulsed laser deposition (PLD) is a technique, for removing material from the surface of a target that uses laser energy pulses. It has several advantages over other depositions methods, including high particle energy to form film, fast deposition rate, and no restriction on the target materials. PLD technology has advanced rapidly in recent years, and it is now widely used in the production of metals, ceramics, transparent electrodes, and high-temperature superconducting films. For traditional PLD technology, nanosecond single-pulse lasers are commonly used as excitation sources. One disadvantage of using nanosecond pulsed laser is the possibility of selective ablation, which could result in a lack of stoichiometry during the process. This is a critical challenge that nanosecond PLD (ns-PLD) technologies for scientific research and industrial applications. With the increasing availability of commercial ultrashort laser sources, in recent years, and its distinct advantage of efficient laser ablation, the ultrashort pulse PLD is gaining popularity as a method for producing thin films. Ultrashort pulse PLD demonstrates its potential capacity to control the emission of droplets due to the diverse ablation mechanisms, even though it may not be the ultimate solution in smooth film deposition. Furthermore, the pulse sequence presented in this article has the potential to change the laser-matter interaction, which can be used to improve the deposit' s surface quality and optical properties. Methods A method for pulsed deposition of picosecond laser based on different pulse burst modes is presented, consisting of four main components: seed oscillator, pulse selector, laser amplifier, and power controller (Fig. 1). The laser burst mode is set from 1 to 4 (Fig. 2) with a 532 nm output wavelength, 100 kHz laser frequency, 33.3 ns intrapulse interval, and 10 ;is interpulse string interval. Zinc oxide (ZnO) transparent conductive thin films are deposited on glass substrates and single-crystal silicon substrates via the proposed method. The effect of different pulse burst modes on the crystal structure, surface morphology, and optical properties of the ZnO film is studied thoroughly using spectroscopic ellipsometry, atomic force microscopy, X-ray diffractometry, ultraviolet-visible spectrophotometry, and scanning electron microscopy. Results and Discussions We obtain film thickness (Fig. 3), refractive index, and extinction coefficient data (Table 1) created for various burst modes (from 1 to 4) and discover that the deposition rate decreases and are accompanied by an increase in refractive index as the number of burst modes increases. To begin, the intrapulse period in multipulse mode is set to 33.3 ns and the average plasma velocity is around 104 cm/s. Therefore, using a burst mode of 4, the plasma in the multipulse mode is not completely disengaged from the target when the last pulse is incident, resulting in laser-plasma contact and partial absorption of the pulsed laser energy by the plasma, and limiting target material extraction. Furthermore, the energy distribution of laser pulses is related to the fact that the first pulse energy gradually decreases as the multipulse burst mode increases in size, reducing the first energy interaction between the laser and the target. The roughness diminishes as the multipulse burst mode is increased (Fig. 4). As the laser-plasma interaction is strengthen, the plasma's kinetic energy increases, resulting in longer plasma lifetimes, longer diffusion durations on the substrate, and eventually favoring the orderly formation of thin films. In the single-pulse mode of laser deposition, large particles and droplets are present; however, the laser-plasma interaction in the multipulse mode can further heat up and break down the large particles in the plasma, resulting in fewer large particles on the film surface and smoother, denser films (Figs. 5 and 6). The crystal structure of the prepared films is examined using XRD (Fig. 7) and the crystal structure data for different pulse burst modes (from 1 to 4) are compared, as shown in Table 1, and it is discovered that the different pulse burst mode does not affect the crystal structure. However, when the pulse burst mode is 4, it has some subtle effects on the crystal size, diffraction peak angle, and film intensity, with larger crystal size and better film quality. The transmittance curves of the films deposited in various pulse burst modes are determined (Fig. 8), In the visible range (380-800 nm), the average transmittances of the films are 90. 31%, 92. 72%, 93. 98%, and 94. 81%, respectively. The optical band gaps (Fig.9) are 3.317, 3.343, 3.362, and 3.427 eV, which are comparable to the normal ZnO bandgap (3.3 eV), which corresponds to the tendency of the central wavelength of the absorption edge in the transmittance curve to move in the direction of short wave. Finally, we calculate resistivity curves for the deposited films under various pulse burst modes (Fig. 10) and discover that the film resistivity is lowest when the pulse burst mode is 4. Conclusions The high-quality ZnO films are deposited on glass and silicon substrates using a laser deposition process in different burst modes, with the number of subpulses in each burst increasing from 1 to 4. The effects of different burst modes of picosecond lasers on the film thickness, roughness, surface topography, crystal structure, optical properties, and electrical properties of ZnO films are investigated. When the pulse burst mode is set to 4, the film surface has less roughness, smaller particle size, higher transmittance, better crystalline quality, and lower resistivity when compared with other burst modes. This is extremely important for relevant optical applications to the production of ZnO thin film.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:54
Main heading:Pulsed lasers
Controlled terms:Atomic force microscopy - Deposition rates - Efficiency - Glass substrates - II-VI semiconductors - Laser ablation - Metal substrates - Metallic films - Optical films - Pulsed laser deposition - Refractive index - Scanning electron microscopy - Silicon wafers - Single crystals - Spectroscopic ellipsometry - Surface morphology - Thin films - X ray diffraction analysis - Zinc oxide
Uncontrolled terms:Burst-mode - Crystals structures - Deposition methods - Multipulses - Picosecond pulsed laser - Picoseconds - Pulsed laser deposition method - Pulsed-laser deposition - Thin-films - Zinc oxide film
Classification code:641.2 Heat Transfer - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 804.2 Inorganic Compounds - 813.2 Coating Materials - 913.1 Production Engineering - 933.1 Crystalline Solids - 941.4 Optical Variables Measurements
Numerical data indexing:Electron volt 3.30E+00eV, Electron volt 3.427E+00eV, Frequency 1.00E+05Hz, Percentage 3.10E+01%, Percentage 7.20E+01%, Percentage 8.10E+01%, Percentage 9.80E+01%, Size 3.80E-07m to 8.00E-07m, Size 5.32E-07m, Time 3.33E-08s, Velocity 1.04E+00m/s
DOI:10.3788/CJL202249.0603003
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 281>
Accession number:20224212987047
Title:Laser Cavity-Solitons and Turing Patterns Microcombs: the Interaction of Slow and Fast Nonlinearities
Authors:Pasquazi, Alessia (1); Rowley, Maxwell (1); Hanzard, Pierre Henry (1); Cutrona, Antonio (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5); Moss, David J. (6); Gongora, Juan Sebastian Totero (1); Peccianti, Marco (1)
Author affiliation:(1) Emergent Photonics (Epic) Lab, Dept. of Physics and Astronomy, University of Sussex, BN1 9QH, United Kingdom; (2) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (4) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology, Chengdu, China; (6) Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@sussex.ac.uk)
Source title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Issue date:2022
Publication year:2022
Article number:JM3A.2
Language:English
ISBN-13:9781957171050
Document type:Conference article (CA)
Conference name:2022 Conference on Lasers and Electro-Optics, CLEO 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:182946
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Slow nonlinearities are critical in microresonator-based frequency combs, regulating essential phenomena, from stability to soliton starting and formation. We discuss their effect in a microresonator-filtered fiber laser.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:6
Main heading:Microresonators
Controlled terms:Fiber lasers - Solitons
Uncontrolled terms:Cavity solitons - Frequency combs - Micro resonators - Microcombs - Turing patterns
Classification code:741.1 Light/Optics - 744.4 Solid State Lasers - 744.7 Laser Components
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 282>
Accession number:20210409830531
Title:Small Infrared Target Detection Based on Fast Adaptive Masking and Scaling with Iterative Segmentation
Authors:Chen, Yaohong (1, 4, 5); Zhang, Gaopeng (1); Ma, Yingjun (1); Kang, Jin U. (2); Kwan, Chiman (3)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore; MD, United States; (3) Signal Processing Inc., Rockville; MD, United States; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore; MD; 21218, United States
Corresponding authors:Kang, Jin U.(jkang@jhu.edu); Kwan, Chiman(chiman.kwan@signalpro.net)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Fast and robust small infrared (IR) target detection is a challenging task and critical to the performance of IR searching and tracking (IRST) systems. However, the current algorithms generally have difficulty in striking a good balance between speed and performance. In this letter, we propose a new approach to small IR target detection that can significantly accelerate the detection process by first performing a fast adaptive masking and scaling algorithm. We then propose to enhance the target characteristics and suppress the background clutter using both contrast and gradient information. Finally, we propose to accurately extract the targets via iterative segmentation. The experimental results demonstrated that our proposed method yields the best and the most robust performance, with a speed of at least two times faster than the state-of-the-art methods.<br/></div> © 2004-2012 IEEE.
Number of references:16
Main heading:Iterative methods
Controlled terms:Signal processing
Uncontrolled terms:Background clutter - Gradient informations - Infrared target detection - IR target detection - Iterative segmentation - Robust performance - State-of-the-art methods - Target characteristic
Classification code:716.1 Information Theory and Signal Processing - 921.6 Numerical Methods
DOI:10.1109/LGRS.2020.3047524
Funding details: Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grant 51905529.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 283>
Accession number:20224313005172
Title:High parametric efficiency in laser cavity-soliton microcombs (Open Access)
Authors:Cutrona, Antonio (1, 2); Rowley, Maxwell (2); Das, Debayan (1, 2); Olivieri, Luana (1, 2); Peters, Luke (1, 2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Moss, David J. (6); Totero Gongora, Juan Sebastian (1, 2); Peccianti, Marco (1, 2); Pasquazi, Alessia (1, 2)
Author affiliation:(1) Emergent Photonics Research Centre, Dept. of Physics, Loughborough University, Loughborough; LE11 3TU, United Kingdom; (2) Emergent Photonics Lab (Epic), Department of Physics and Astronomy, University of Sussex, Brighton; BN1 9QH, United Kingdom; (3) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (5) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@lboro.ac.uk)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:22
Issue date:October 24, 2022
Publication year:2022
Pages:39816-39825
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Laser cavity-soliton microcombs are robust optical pulsed sources, usually implemented with a microresonator-filtered fibre laser. In such a configuration, a nonlinear microcavity converts the narrowband pulse resulting from bandwidth-limited amplification to a background-free broadband microcomb. Here, we theoretically and experimentally study the soliton conversion efficiency between the narrowband input pulse and the two outputs of a four-port integrated microcavity, namely the 'Drop' and 'Through' ports. We simultaneously measure on-chip, single-soliton conversion efficiencies of 45% and 25% for the two broadband comb outputs at the 'Drop' and 'Through' ports of a 48.9 GHz free-spectral range micro-ring resonator, obtaining a total conversion efficiency of 72%.<br/></div> Journal © 2022.
Number of references:40
Main heading:Conversion efficiency
Controlled terms:Drops - Fiber lasers - Microcavities - Optical resonators - Pulsed lasers - Solitons
Uncontrolled terms:Bandwidth limiteds - Cavity solitons - Input pulse - Micro resonators - Microcombs - Narrow bands - Narrowband pulse - Optical- - Parametric efficiencies - Pulsed source
Classification code:525.5 Energy Conversion Issues - 714 Electronic Components and Tubes - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.4 Solid State Lasers
Numerical data indexing:Frequency 4.89E+10Hz, Percentage 2.50E+01%, Percentage 4.50E+01%, Percentage 7.20E+01%
DOI:10.1364/OE.470376
Funding details: Number: DSTLX1000142078, Acronym: Dstl, Sponsor: Defence Science and Technology Laboratory;Number: 725046,851758, Acronym: H2020, Sponsor: Horizon 2020 Framework Programme;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: EP/S001018/1, Acronym: EPSRC, Sponsor: Engineering and Physical Sciences Research Council;Number: ECF-2020-537, Acronym: -, Sponsor: Leverhulme Trust;Number: -, Acronym: ERC, Sponsor: European Research Council;Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 10004412,77087, Acronym: -, Sponsor: Innovate UK;
Funding text:Funding. Engineering and Physical Sciences Research Council (EP/S001018/1); European Research Council (725046, 851758); Defence Science and Technology Laboratory (DSTLX1000142078); Innovate UK (10004412, 77087); Leverhulme Trust (ECF-2020-537); Natural Sciences and Engineering Research Council of Canada; Ministère de l’Économie, de la Science et de l’Innovation - Québec; Strategic Priority Research Program of the Chinese Academy of Sciences (XDB24030300).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 284>
Accession number:20222312194149
Title:Versatile, high bandwidth, RF and microwave photonic Hilbert transformers based on Kerr micro-combs
Authors:Li, Yang (1); Tan, Mengxi (2); Wu, Jiayang (1); Xu, Xingyuan (3); Sun, Yang (1); Boes, Andreas (2); Corcoran, Bill (4); Nguyen, Thach G. (2); Chu, Sai T. (5); Little, Brent E. (6); Morandotti, Roberto (7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, Rmit University, Melbourne; VIC; 3001, Australia; (3) Department of Electronics Engineering, Beijing University of Posts and Telecommunications, Beijing, China; (4) Electro-Photonics Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (5) Department of Physics, City University of Hong Kong, Hong Kong, Hong Kong; (6) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 110015, China; (7) Inrs -Énergie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12004
Part number:1 of 1
Issue title:Integrated Optics: Devices, Materials, and Technologies XXVI
Issue date:2022
Publication year:2022
Article number:120040H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510648791
Document type:Conference article (CA)
Conference name:Integrated Optics: Devices, Materials, and Technologies XXVI 2022
Conference date:February 20, 2022 - February 24, 2022
Conference location:Virtual, Online
Conference code:179330
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">We experimentally demonstrate bandwidth-tunable RF photonic Hilbert transformer based on an integrated Kerr microcomb source. The micro-comb is generated by an integrated micro-ring resonator with a free spectral range of 48.9 GHz, yielding 75 micro-comb lines in the telecom C-band. By programming and shaping the generated comb lines according to calculated tap weights, we demonstrate high-speed Hilbert transform functions with tunable bandwidths ranging from 1.2 GHz to 15.3 GHz, switchable center frequencies from baseband to 9.5 GHz, and arbitrary fractional orders. The experimental results show good agreement with theory and confirm the effectiveness of our approach.<br/></div> © 2022 SPIE.
Number of references:127
Main heading:Bandwidth
Controlled terms:C (programming language) - Integrated optics - Optical resonators - Optical signal processing
Uncontrolled terms:All-optical signal processing - Frequency combs - High bandwidth - High microwave - Hilbert transform - Hilbert transformers - Kerr frequency comb - Microwave Photonics - RF photonics - Tunables
Classification code:716.1 Information Theory and Signal Processing - 723.1.1 Computer Programming Languages - 741.3 Optical Devices and Systems
Numerical data indexing:Frequency 1.20E+09Hz to 1.53E+10Hz, Frequency 4.89E+10Hz, Frequency 9.50E+09Hz
DOI:10.1117/12.2607903
Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327,DP190101576,DP190102773, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: -, Sponsor: Canada Research Chairs;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program (grant numbers DP150104327, DP190102773 and DP190101576) and the Swinburne ECR-SUPRA program. RM acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic and Discovery Grants Schemes, by the MESI PSRSIIRI Initiative in Quebec, and by the Canada Research Chair Program.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 285>
Accession number:20223112457238
Title:Modified active disturbance rejection control scheme with sliding mode compensation for airborne star tracker driven by Permanent Magnet Synchronous Motor
Authors:Wang, Fan (1, 3, 5); Cheng, Tianji (1, 2, 4); Zhu, Hua (1, 2, 4); Liu, Zhiwen (1, 2, 4); Han, Chongyang (1, 2, 4); Wang, Ranjun (1, 4); Liu, Enhai (1, 4)
Author affiliation:(1) Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; (2) University of Chinese Academy of Sciences, Beijing; 100149, China; (3) Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement, Chinese Academy of Sciences, Chengdu; 610209, China; (5) Key Laboratory of Space Precision Measurement, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Ranjun(wrjwzf@163.com)
Source title:Control Engineering Practice
Abbreviated source title:Control Eng. Pract.
Volume:127
Issue date:October 2022
Publication year:2022
Article number:105267
Language:English
ISSN:09670661
CODEN:COEPEL
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">For an airborne star tracker, pointing and switching the target stars with high precision and fast response is necessary for the star observation. However, under airborne circumstances, the control performance of star tracker will be deteriorated by multiple types of disturbance. Therefore, the disturbance suppression is indispensable. In this paper, a high-precision position control scheme for a Permanent Magnet Synchronous Motor (PMSM) driven airborne star tracker is presented based on active disturbance rejection control (ADRC) to overcome the disturbance and improve the robustness of the system. Firstly, to reduce the disturbance estimation error, a modified extended state observer (MESO) with predictive factor is proposed. The stability analysis verifies its feasibility based on input to state stability (ISS) framework and parameter tuning method of MESO via frequency domain analysis is also given. Secondly, aiming at the problem of insufficient disturbance compensation ability of classical ADRC because of the estimation error in control gain and of chattering phenomenon in the conventional sliding mode control, a chattering-reduced sliding mode (SM) component is added to the state error feedback. It is proved that the SM component can make the system reach the sliding surface in limited time via Lyapunov theory and the closed loop stability of the controller can also be ensured. Finally, comparative simulations and experiments are conducted to verify the effectiveness of the proposed control scheme. The simulations show the superiorities of the proposed methods in anti-disturbance capability and robustness. The experimental results testify to the feasibility and better performance of the proposed methods in practical applications of star tracker.<br/></div> © 2022 Elsevier Ltd
Number of references:49
Main heading:Sliding mode control
Controlled terms:Disturbance rejection - Error compensation - Frequency domain analysis - Permanent magnets - Position control - Robustness (control systems) - Stability - Stars - State estimation - Synchronous motors
Uncontrolled terms:Active disturbance rejection control - Active disturbances rejection controls - Control schemes - Extended state observer - Input to state stability - Input-to-state stability - Modified extended state observer - Permanent Magnet Synchronous Motor - Robustness - Sliding-mode control
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 704.1 Electric Components - 705.3.1 AC Motors - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 921.3 Mathematical Transformations
DOI:10.1016/j.conengprac.2022.105267
Funding details: Number: 2016YFB0501105, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key Research and Development Project [grant numbers 2016YFB0501105 ];
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 286>
Accession number:20222412225942
Title:Rotation-Invariant Attention Network for Hyperspectral Image Classification
Authors:Zheng, Xiangtao (1); Sun, Hao (1, 2); Lu, Xiaoqiang (1); Xie, Wei (3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Central China Normal University, Hubei Provincial Key Laboratory of Artificial Intelligence and Smart Learning, National Language Resources Monitoring and Research Center for Network Media, School of Computer, Wuhan; 430079, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:31
Issue date:2022
Publication year:2022
Pages:4251-4265
Language:English
ISSN:10577149
E-ISSN:19410042
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Hyperspectral image (HSI) classification refers to identifying land-cover categories of pixels based on spectral signatures and spatial information of HSIs. In recent deep learning-based methods, to explore the spatial information of HSIs, the HSI patch is usually cropped from original HSI as the input. And 3 × 3 convolution is utilized as a key component to capture spatial features for HSI classification. However, the 3 × 3 convolution is sensitive to the spatial rotation of inputs, which results in that recent methods perform worse in rotated HSIs. To alleviate this problem, a rotation-invariant attention network (RIAN) is proposed for HSI classification. First, a center spectral attention (CSpeA) module is designed to avoid the influence of other categories of pixels to suppress redundant spectral bands. Then, a rectified spatial attention (RSpaA) module is proposed to replace 3 × 3 convolution for extracting rotation-invariant spectral-spatial features from HSI patches. The CSpeA module, the 1 × 1 convolution and the RSpaA module are utilized to build the proposed RIAN for HSI classification. Experimental results demonstrate that RIAN is invariant to the spatial rotation of HSIs and has superior performance, e.g., achieving an overall accuracy of 86.53% (1.04% improvement) on the Houston database. The codes of this work are available at https://github.com/spectralpublic/RIAN.<br/></div> © 1992-2012 IEEE.
Number of references:63
Main heading:Convolution
Controlled terms:Classification (of information) - Data mining - Deep learning - Extraction - Feature extraction - Image classification - Neural networks - Pixels - Rotation - Spectroscopy
Uncontrolled terms:Attention mechanisms - Convolutional neural network - Features extraction - Hyperspectral image classification - Interference - Kernel - Rotation invariant - Rotation-invariant network - Spatial features - Spectral-spatial feature extraction
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 802.3 Chemical Operations - 903.1 Information Sources and Analysis - 931.1 Mechanics
Numerical data indexing:Percentage 1.04E+00%, Percentage 8.653E+01%
DOI:10.1109/TIP.2022.3177322
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 287>
Accession number:20215011328383
Title:Enhanced Photoluminescence of Monolayer MoSe<inf>2</inf> in a Double Resonant Plasmonic Nanocavity with Fano Resonance and Mode Matching
Authors:Li, Chenyang (1); Wang, Qifa (1); Diao, Hang (1); Hao, Zhen (1); Yu, Weixing (2); Liu, Kaihui (3); Gan, Xuetao (1); Xiao, Fajun (1); Zhao, Jianlin (1)
Author affiliation:(1) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) Key Laboratory of Spectral, Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (3) State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Centre of Quantum Matter, School of Physics, Peking University, Beijing; 100871, China
Corresponding authors:Gan, Xuetao(xuetaogan@nwpu.edu.cn); Xiao, Fajun(fjxiao@nwpu.edu.cn); Zhao, Jianlin(jlzhao@nwpu.edu.cn)
Source title:Laser and Photonics Reviews
Abbreviated source title:Laser Photon. Rev.
Volume:16
Issue:2
Issue date:February 2022
Publication year:2022
Article number:2100199
Language:English
ISSN:18638880
E-ISSN:18638899
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Two-dimensional transition metal dichalcogenides exhibit remarkable optical properties. However, their applications in electronics and photonics are severely limited by the intrinsically low absorption and emission rates. Here, the photoluminescence (PL) enhancement by integrating the monolayer MoSe<inf>2</inf> into an Ag nanowire-on-mirror (NWoM) nanocavity is reported. From the dark-field scattering spectrum, a Fano resonance resulting from the coupling between discrete exciton state of MoSe<inf>2</inf> and broad plasmon mode of nanocavity is observed. This Fano resonance, as a characteristic of intermediate plasmon–exciton coupling, shows remarkable ability to accelerate emission rate of MoSe<inf>2</inf>. Furthermore, the nanocavity with multiple resonances provides an excellent spatial mode overlap at excitation and emission wavelengths that affords the intriguing opportunity to resonantly enhance the absorption and PL quantum yield at the same location. The combination of Fano resonance and mode matching allows the attainment of over 1800-fold PL enhancement. These results provide a facile way to enhance the PL intensity of monolayer MoSe<inf>2</inf> that may facilitate highly efficient optoelectronic devices.<br/></div> © 2021 Wiley-VCH GmbH
Number of references:47
Main heading:Monolayers
Controlled terms:Optical properties - Optoelectronic devices - Selenium compounds - Excitons - Transition metals - Resonance - Plasmonics - Photoluminescence
Uncontrolled terms:Emissions rates - Fano resonances - Mode matching - Monolayer mose2 - Nano-cavities - Photoluminescence enhancement - Plasmonic nanocavity - Plasmonics - Purcell-effect - Two-dimensional
Classification code:531 Metallurgy and Metallography - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 931.1 Mechanics - 932.3 Plasma Physics
Numerical data indexing:Size 5.08E-02m
DOI:10.1002/lpor.202100199
Funding details: Number: LSIT201913W, Acronym: -, Sponsor: -;Number: 2019ZT08C321, Acronym: -, Sponsor: -;Number: 2021KW‐19, Acronym: -, Sponsor: -;Number: 11634010,11874050,61905196,91950119, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NPU, Sponsor: Northwestern Polytechnical University;Number: 2017YFA0303800, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 3102019JC008,D5000210936, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:The authors are thankful for the support by the National key R&D Program of China (2017YFA0303800), the National Natural Science Foundation of China (NSFC) (11634010, 11874050, 91950119, 61905196), Shaanxi Provincial Key R&D Program (2021KW‐19), the Pearl River Talent Recruitment Program of Guangdong Province (2019ZT08C321), Fundamental Research Funds for the Central Universities (3102019JC008, D5000210936), Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (No. LSIT201913W), and the SEM measurements by the Analytical and Testing Center of Northwestern Polytechnical University.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 288>
Accession number:20223812755051
Title:A Large Area Dynode-MCP-PMT Design With High CE and Good Time Performance
Authors:Chen, Lin (1); Wang, Xingchao (2, 3); He, Jianli (4); Tian, Li Liping (1); Tian, Jinshou (5); Wang, Qilong (2); Shen, Lingbin (1); Wang, Yunji (1); Ding, Dongyan (1); Ji, Ke (1); Yang, Jie (1)
Author affiliation:(1) Jinling Institute of Technology, School of Network and Communication Engineering, Nanjing; 211169, China; (2) Southeast University, School of Electronic Science and Engineering, Nanjing; 210096, China; (3) North Night Vision Technology Company, Ltd., Nanjing; 210110, China; (4) Inner Mongolia University of Science and Technology, School of Physics, Baotou; 014010, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'an; 710119, China
Source title:IEEE Transactions on Nuclear Science
Abbreviated source title:IEEE Trans Nucl Sci
Volume:69
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2113-2117
Language:English
ISSN:00189499
E-ISSN:15581578
CODEN:IETNAE
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A 20-in. photomultiplier tube based on dynode and microchannel plates (Dynode-MCP-PMT) with high collection efficiency (CE) and good time performance is proposed in this article. To obtain a tailless time distribution, a pair of uncoated MCPs are employed. For a high CE, a dynode with two large openings is placed in front of the MCPs. The dynode is designed as a spherical shape to prevent secondaries from escaping the multiplication system and assist them moving to the MCPs for further multiplication. A 3-D model is developed by CST Studio Suite to validate its feasibility. Finite integral technique and Monte Carlo method are combined to simulate the photoelectron collection and multiplication processes. Results predict that for the shielded Dynode-MCP-PMT, CE is expected to be 100%. Tailless transit time distributions are observed. Transit time spread (TTS) of the photoelectrons from the cathode top point to the dynode achieves 3.7 ns. If this PMT is exposed to the geomagnetic field, it should be operated in the north and south direction, in which CE and TTS are expected to be 100% and 3.8 ns, respectively.<br/></div> © 1963-2012 IEEE.
Number of references:19
Main heading:Cathodes
Controlled terms:Efficiency - Electric fields - Geomagnetism - Image storage tubes - Microchannels - Monte Carlo methods - Photoelectrons - Photomultipliers - Photons
Uncontrolled terms:Collection efficiency - Dynode - Face - High collection efficiency - MCP-PMT - Micro channel plate - Performance - Photomultiplier tube - Tail - Transit time spread
Classification code:481.3.2 Earth Magnetism and Terrestrial Electricity - 701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 714.1 Electron Tubes - 913.1 Production Engineering - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics
Numerical data indexing:Percentage 1.00E+02%, Size 5.08E-01m, Time 3.70E-09s, Time 3.80E-09s
DOI:10.1109/TNS.2022.3204791
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 289>
Accession number:20223912802110
Title:R&D and application of the Abyssal Bottom Boundary Layer Observation System (ABBLOS)
Title of translation:深海海底边界层原位观测系统研发与应用
Authors:Ji, Chunsheng (1); Jia, Yonggang (1, 2); Zhu, Junjiang (3, 4); Hu, Naili (1); Fan, Zhihan (1); Hu, Cong (1); Feng, Xuezhi (1); Yu, Heyu (1); Liu, Bo (5)
Author affiliation:(1) Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), Ocean University of China, Qingdao; 266100, China; (2) Function Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266061, China; (3) Key Lab of Submarine Geosciences and Prospecting Techniques, MOE, Qingdao; 266100, China; (4) College of Marine Geosciences, Ocean University of China, Qingdao; 266100, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Jia, Yonggang(yonggang@ouc.edu.cn)
Source title:Earth Science Frontiers
Abbreviated source title:Earth Sci. Front.
Volume:29
Issue:5
Issue date:September 2022
Publication year:2022
Pages:265-274
Language:Chinese
ISSN:10052321
Document type:Journal article (JA)
Publisher:Science Frontiers editorial department
Abstract:<div data-language="eng" data-ev-field="abstract">In order to further study the influence of marine dynamics on the bottom boundary layer (BLL) of the northern slope, South China Sea, the Abyssal Bottom Boundary Layer Observation System (ABBLOS) was developed for in situ observations. The ABBLOS-a carrier platform with a maximum operating water depth of 6700 m (actual depth limits depend on the carried equipment)-is an important technological innovation for studying the deep-sea BBL. The platform is compose of upper and lower frames. The upper frame is used to carry and recover observation equipment, and the lower supporting frame is a counterweight and used to provide an observational space 1 meter from the seabed. A simple and effective "slot positioning with bolt fastening" connection was designed to connect the two frames to ensure a successful upper frame recovery. The ABBLOS integrates 75k-ADCP, high-frequency ADCP, ADV, high-precision pressure gauge, as well as sensors for methane, temperature, salinity, turbidity, dissolved oxygen, and ORP. For the first time, the ABBLOS achieves simultaneous observation of marine dynamic processes (such as internal waves and midscale vortices) and dynamic changes of physical and chemical parameters in the deep-sea BBL. In particular, the water flow velocity profile at 1 meter height above the seafloor can be observed with a 7 mm vertical layer resolution. The platform was successfully deployed and recovered in 2020 in the Shenhu sea area, northern slope of the South China Sea, at water depths of 655 and 1405 m. The total observation time was 34 days, and the seawater velocity profile structure was obtained. Also captured were a once-a-day (on average) internal wave action process and a set of physicochemical parameters for the BBL. After a preliminary analysis of the observation data at 655 m water depth, it was found that the temperature, pressure, dissolved oxygen, density and salinity in the BBL were controlled by the tidal process; especially, the change of temperature and pressure was in synch with tide. During a tidal cycle, the oxidative environment of the BBL was relatively stable, whilst the concentration of dissolved methane decreased with time but kept within the global background value range. Compared to the tidal process, internal waves had little impact on the abyssal BBL, but could obviously cause sediment resuspension. The turbidity of the BBL caused by internal waves increased from 0.01 to 48 NTU and meanwhile the submarine cameras also recorded turbid seawater in the BBL during the internal wave propagation, indicating the internal waves in the South China Sea can affect the transport of submarine sediment.<br/></div> © 2022 Science Frontiers editorial department. All rights reserved.
Number of references:33
Main heading:Boundary layers
Controlled terms:Biochemical oxygen demand - Dissolution - Dissolved oxygen - Flow of water - Flow velocity - Methane - Recovery
Uncontrolled terms:Bottom boundary layer - Deep sea - In-situ observations - Internal waves - Northern slope of south china sea - Observation systems - South China sea - Tidal process - Velocity profiles - Water depth
Classification code:631 Fluid Flow - 631.1.1 Liquid Dynamics - 802.3 Chemical Operations - 804.1 Organic Compounds - 943.2 Mechanical Variables Measurements
Numerical data indexing:Age 9.316E-02yr, Size 1.00E00m, Size 1.405E+03m, Size 5.1308E+01m, Size 6.55E+02m, Size 6.70E+03m, Size 7.00E-03m
DOI:10.13745/j.esf.sf.2021.9.28
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 290>
Accession number:20224513055384
Title:Remote Epitaxy and Exfoliation of GaN via Graphene
Authors:Han, Xu (1, 2, 3); Yu, Jiadong (1, 2, 3); Li, Zhenhao (1, 3); Wang, Xun (1, 3); Hao, Zhibiao (1, 2, 3, 3); Luo, Yi (1, 2, 3); Sun, Changzheng (1, 2, 3); Han, Yanjun (1, 2, 3); Xiong, Bing (1, 2, 3); Wang, Jian (1, 2, 3); Li, Hongtao (1, 2, 3); Zhang, Yuantao (3, 4); Duan, Bin (3, 5); Ning, Jing (3, 6); Wu, Haidi (3, 6); Wang, Lai (1, 2, 3)
Author affiliation:(1) Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering, Tsinghua University, Beijing; 100084, China; (2) Center for Flexible Electronics Technology, Tsinghua University, Beijing; 100084, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (4) State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Qianjin Street 2699, Changchun; 130012, China; (5) College of Physics, Jilin University, Changchun; 130012, China; (6) State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi'an; 710071, China
Corresponding authors:Yu, Jiadong(yjd13@tsinghua.org.cn); Wang, Lai(wanglai@tsinghua.edu.cn)
Source title:ACS Applied Electronic Materials
Abbreviated source title:ACS Appl. Electron. Mater.
Volume:4
Issue:11
Issue date:November 22, 2022
Publication year:2022
Pages:5326-5332
Language:English
E-ISSN:26376113
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The remote epitaxy of GaN via graphene has attracted much attention due to the potential of easy mechanical exfoliation, and the exfoliated layers can be transferred onto foreign substrates according to the application needs, which is beneficial to improve the performance of GaN-based devices. In this work, a GaN epi-layer was grown by metal-organic chemical vapor deposition on the monolayer-graphene-coated AlN/sapphire or GaN substrates. The influence of growth temperature, carrier gas, and substrate on the exfoliation of the GaN epi-layer was studied. When the growth temperature is no more than 800 °C and N<inf>2</inf>is used as the carrier gas, the monolayer graphene can be retained on the AlN/sapphire substrate during the growth process. Thus, the GaN epi-layer can be exfoliated successfully. However, the monolayer graphene will be destroyed under a growth temperature of 850 °C, and lead to the failure of exfoliation. Besides, the monolayer graphene can also be damaged when the H<inf>2</inf>carrier gas or GaN substrate is employed with a growth temperature of 800 °C. This causes the GaN epi-layer to be exfoliated not as well. The experimental results illustrate that suitable growth conditions and substrate are important for realizing the exfoliation of a GaN epi-layer.<br/></div> © 2022 Authors. All rights reserved.
Number of references:30
Main heading:Gallium nitride
Controlled terms:Aluminum nitride - Graphene - Growth temperature - III-V semiconductors - Metallorganic chemical vapor deposition - Monolayers - Organic chemicals - Organometallics - Sapphire - Substrates
Uncontrolled terms:Carrier gas - Epi layers - Exfoliated layers - Exfoliation - Foreign substrates - GaN substrate - Mechanical exfoliation - Performance - Remote epitaxy - Sapphire substrates
Classification code:482.2.1 Gems - 712.1 Semiconducting Materials - 761 Nanotechnology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds
Numerical data indexing:Temperature 1.073E+03K, Temperature 1.123E+03K
DOI:10.1021/acsaelm.2c00997
Funding details: Number: 61875104,61904093,61927811,61974080,61975093,61991443,62150027,62225405, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M670328, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2021YFA0716400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: -, Acronym: SSL, Sponsor: Solid State Lighting and Energy-Savings Electronics Collaborative Innovation Center;
Funding text:All the authors gratefully acknowledge the National Key Research and Development Program of China (Grant No. 2021YFA0716400), the National Natural Science Foundation of China (Grant Nos. 62225405, 62150027, 61974080, 61904093, 61975093, 61991443, 61927811, and 61875104), the China Postdoctoral Science Foundation (Grant No. 2020M670328), and the Collaborative Innovation Centre of Solid-State Lighting and Energy-Saving Electronics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 291>
Accession number:20223112459437
Title:Superimposed Hermite–Gaussian-correlated Schell-model beam with multiple off-axis vortices
Authors:Zhou, Zheng-Lan (1, 2); Xu, Hua-Feng (3); Zhou, Yuan (2, 4); Zhang, Shaohua (1); Yuan, Yangsheng (5); Han, Yashuai (1); Zhou, Zhengxian (1); Yao, Baoli (2); Qu, Jun (1, 2)
Author affiliation:(1) School of Physics and Electronic Information, Anhui Normal University, Anhui, Wuhu; 241000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shanxi, Xi’an; 710119, China; (3) School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Anhui, Huainan; 232001, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) School of Physics and Electronics, Shandong Normal University, Shandong, Jinan; 250014, China
Corresponding author:Qu, Jun(qujun70@mail.ahnu.edu.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:39
Issue:8
Issue date:August 2022
Publication year:2022
Pages:1385-1392
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We first introduce a class of a superimposed Hermite–Gaussian-correlated Schell model with a multiple off-axis vortices beam, with the side lobe of the beam carrying one to four vortex singularities at the source plane. Subsequently, the variation laws of this beam after being focused by a thin lens are studied theoretically to obtain the optimal beam parameters. The numerical simulation results show that the beam possesses a unique multiple vortex structure, phase structure, and orbital angular momentum. Its intensity resembles a spiral staircase rotating around the axes. The rotational symmetry property of the transverse energy flow along the z axis was broken by the vortices. The hot spot position can be adjusted flexibly by changing the off-axis distance of vortices. This study is of great significance for nondestructive capture and manipulation of multiple particles or cells.<br/></div> © 2022 Optica Publishing Group
Number of references:34
Main heading:Vortex flow
Controlled terms:Coherent light - Gaussian beams - Molecular biology
Uncontrolled terms:Beam parameter - Gaussians - Hermite - Off-axis - Optimal beams - Schell-model beams - Side lobes - Thin lens - Vortex beams - Vortex structures
Classification code:461.9 Biology - 631.1 Fluid Flow, General - 711 Electromagnetic Waves - 741.1 Light/Optics
DOI:10.1364/JOSAA.462129
Funding details: Number: 11974219,12074005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Acknowledgment. J. Qu thanks the National Natural Science Foundation of China and State Key Laboratory of Transient Optics and Photonics for help identifying collaborators for this work.Funding. State Key Laboratory of Transient Optics and Photonics (SKLST202103); National Natural Science Foundation of China (11974219, 12074005).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 292>
Accession number:20224513069722
Title:Research and Development of Key Technologies and Equipment for Multiaxis CNC Laser Engraving
Title of translation:多轴 ? 动数控激光刻型加工关键技术 ? 装备研
Authors:Liu, Qiang (1, 4); Wang, Jian (1, 5); Sun, Pengpeng (1, 6); Li, Ming (2); Wang, Hui (3); Yin, Zhenshuo (1, 4); Wang, Liuquan (1, 5); Li, Kunhang (3)
Author affiliation:(1) School of Mechanical Engineering and Automation, Beihang University, Beijing; 100191, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (3) Aecc Shenyang Liming Aero-Engine Co. Ltd., Liaoning, Shenyang; 110043, China; (4) Jiangxi Research Institute of Beihang University, Jiangxi, Nanchang; 330096, China; (5) Beijing Eng. Technol. Res. Center of High-Efficient and Green Cnc Machining Process and Equipment, Beijing; 100191, China; (6) DSTI Innovation Center of High-Efficient Cnc Machining Technology, Beijing; 100191, China
Corresponding author:Liu, Qiang(qliusmea@buaa.edu.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:49
Issue:10
Issue date:May 25, 2022
Publication year:2022
Article number:1002401
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Objective As a new pattern engraving method of chemical milling parts, laser engraving is one of the important processes in chemical milling for aeroengine casing. This technique can effectively improve the precision and the efficiency of chemical milling. Moreover, it is greatly significant in improving the thrust-weight ratio and the manufacturing efficiency of the aeroengine. In the laser engraving process, according to the numerical control (NC) machining program based on the geometric pattern information and the process parameters of chemical milling, the geometric pattern is engraved on the protective adhesive layer by laser ablation under the control of the optical electromechanical cooperative control system. Laser engraving combines laser processing with the NC technology and a digital manufacturing process that has high precision and efficiency, digitization, and flexibility. The method can also be used for primary/secondary engraving on complex surfaces to solve the engraving bottleneck problem of aerospace complex thin-walled structures. The laser engraving research in China is still in its initial stage and mainly focuses on investigating the primary laser engraving process parameters and the engineering application of foreign laser engraving machines. Less research has been conducted on the key technologies and equipment used for the laser engraving of three-dimensional (3D) complex structure parts, and many technical difficulties have not yet been overcome. This work investigates the key technologies of the engraving process parameters, including laser engraving trajectory planning, optical electromechanical collaborative optimization model, and adaptive matching mechanism. The six-axis, five-linkage NC laser engraving machine tool is developed to provide a new solution to the bottleneck problem of engraving in the chemical milling of the complex thin-walled structures of the aerospace. Methods First, based on the laser multiple engraving process, a laser engraving trajectory planning algorithm considering the chemical milling evolution is proposed herein to solve the laser engraving problem of the complex surface on aeroengine casing. The basic processes of trajectory planning and automatic programming of the pattern features for multiple laser engraving are given. The multi-axis motion trajectory of the laser engraving position and direction is fitted by a complete B-spline curve and a segmented double B-spline curve. The number of control points and the fitting error of the curve are then analyzed. Second, an opto-mechatronics collaborative optimization model is established aiming at the minimum processing time and the minimum width of the heat-affected zone while the adhesive layer is etched through. In this model, the bow height error of the trajectory curve, speed, acceleration, and jerk of the feed axis are considered. Furthermore, the minimum processing time is equivalent to the maximum feed speed. Third, an adaptive matching optimization algorithm for the engraving process parameters is established to solve the optimization problem of the motion and laser process parameters. The laser process parameters that satisfy the constraints under different speed conditions are simulated and calculated, providing theoretical parameters for the optical electromechanical cooperative control of laser engraving. Finally, the structure of the six-axis, five-linkage NC laser engraving machine tool, the high-precision optical path flexible transmission and positioning, and the optical electromechanical cooperative control system are implemented. The six-axis, five-linkage NC laser engraving machine tool is developed to realize the application of primary/secondary laser engraving. Results and Discussions First, for the trajectory planning of the laser engraving position points, a complete B-spline curve and a segmented B-spline curve are used to generate the trajectory that meets the accuracy requirements. The fitting accuracy of each curve is less than 0.008 mm (Fig. 5). To ensure the fitting accuracy, the complete B-spline curve needs more control points, while the segmented B-spline curve needs less control points (Table 1). The segmented double B-spline curve is used to generate the trajectory for the engraving position and direction. The fitting accuracy of the segmented double B-spline curve of the laser engraving position and direction can reach 0.005 mm (Fig. 5). The maximum error of the direction vector angle by the segmented double B-spline curve is 0.0061 rad, which effectively meets the laser engraving process requirements. Second, the simulation results of the opto-mechatronics collaborative optimization model illustrate that the energy in the heat-affected zone exceeding the threshold is mainly considered in the low-speed movement section. In addition, the engraving speed is increased to ensure the engraving quality (Fig. 8). The kinematic constraints of the equipment are mainly considered to complete the engraving processing with the highest efficiency in the high-speed movement section. The comprehensive balance between the engraving quality and efficiency is realized in this model. Third, to optimize the motion and process parameters in the engraving process, the comprehensive optimization results under different weight conditions are given, and the corresponding process parameters of the laser energy density and the duty ratio under different speeds are calculated (Fig. 9). Different laser motion and laser parameters can be quickly selected through different weight settings. Fourth, the primary engraving/secondary engraving of the annular thin-walled milling cylinder parts of an aeroengine casing is realized. The accuracy error of the secondary laser engraving can reach 0.034 mm, meeting the process requirements of the secondary laser engraving accuracy that should be less than 0. 05 mm. Conclusions This study investigates the key technologies of the laser engraving process, including laser engraving feature trajectory planning and automatic programming, collaborative optimization control of the laser engraving process, high-precision optical path flexible transmission and positioning, and optical electromechanical collaborative control system. The principle and engineering prototypes of the six-axis, five-linkage NC laser engraving machine tool are successfully developed, consequently providing the key technologies and the equipment support for solving the laser engraving problem of aerospace chemical milling structural parts. The key technologies of the laser engraving process and the six-axis, five-linkage NC laser engraving machine tool will not only solve the manufacturing problem of aerospace chemical milling parts, they can also be widely used in the fine manufacturing of 3D complex surfaces, which will effectively improve the performance and the manufacturing efficiency of major instruments and equipment.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:35
Main heading:Thin walled structures
Controlled terms:Adhesives - Aircraft engines - Curve fitting - Efficiency - Interpolation - Laser ablation - Machine tools - Milling (machining) - Process control - Process monitoring - Splines - Trajectories
Uncontrolled terms:5-axis CNC - B spline curve - Co-operative control - Engraving process - Laser engraving - Micro-fabrication - Optical electromechanical cooperative control - Optical- - Optimization of process parameters - Trajectory Planning
Classification code:601.2 Machine Components - 603.1 Machine Tools, General - 604.2 Machining Operations - 641.2 Heat Transfer - 653.1 Aircraft Engines, General - 744.8 Laser Beam Interactions - 913.1 Production Engineering - 921.6 Numerical Methods
Numerical data indexing:Absorbed dose 6.10E-05Gy, Size 3.40E-05m, Size 5.00E-03m, Size 5.00E-06m, Size 8.00E-06m
DOI:10.3788/CJL202249.1002401
Funding details: Number: 820699, Acronym: H2020, Sponsor: Horizon 2020 Framework Programme;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 293>
Accession number:20220911705236
Title:Signal recovery of a Fabry-Pérot interferometric x-ray pulse detector based on the RadOptic effect
Authors:Wang, Gang (1, 2); He, Kai (1); Liu, Yiheng (1, 2); Yan, Xin (1); Gao, Guilong (1); Wang, Tao (1); Yuan, Xiaohui (3); Zhao, Xu (3); Dong, Yufeng (4); Tian, Jinshou (1, 5)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Centre of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai; 200240, China; (4) Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing; 100190, China; (5) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding authors:He, Kai(hekai@opt.ac.cn); Tian, Jinshou(tianjs@opt.ac.cn)
Source title:Journal of Applied Physics
Abbreviated source title:J Appl Phys
Volume:131
Issue:6
Issue date:February 14, 2022
Publication year:2022
Article number:064501
Language:English
ISSN:00218979
E-ISSN:10897550
CODEN:JAPIAU
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The signal recovery of a Fabry-Pérot interferometric x-ray pulse detector based on the RadOptic effect in the non-limiting case was investigated in this research. A Fe-doped InP with an invariant excess carrier recombination mechanism was used as the interference cavity material to achieve a constant temporal instrumental response function (tIRF). A linear and time-invariant detection system described by the convolution of the time-varying x-ray pulse and the constant tIRF was established based on the transient refractive index variation model determined by the three effects of band filling, band shrinkage, and free-carrier absorption. For the non-limiting case, the accumulation of excess carriers enhanced the sensitivity but altered the fluctuations of the real x-ray pulse. To realistically reconstruct the x-ray pulse, two-photon absorption of the infrared ultrashort pulse was used to simulate the ultrashort x-ray excitation to obtain the tIRF. Finally, using the conjugate gradient method, the original signal recorded by the detection system was deconvoluted to recover the signal. The success of signal recovery in the non-limiting case provided the basis for the development of detectors with adjustable sensitivity controlled by carrier lifetime.<br/></div> © 2022 Author(s).
Number of references:27
Main heading:Refractive index
Controlled terms:Carrier lifetime - Fabry-Perot interferometers - III-V semiconductors - Indium phosphide - Interferometry - Iron compounds - Recovery - Semiconducting indium phosphide - Signal reconstruction
Uncontrolled terms:Carrier recombination - Detection system - Excess carriers - Fabry-Perot - Fe-doped - Instrumental response function - Interferometrics - Limiting case - Pulse detectors - X ray pulse
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 712.1 Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 804.2 Inorganic Compounds - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.1063/5.0073295
Funding details: Number: 12075312,62005311,XAB2020YN10, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA25030900), the National Natural Science Foundation of China (NNSFC) (Grant Nos. 12075312 and 62005311), the CAS "Light of West China" Program (Grant No. XAB2020YN10), and the Youth Innovation Promotion Association CAS (Grant No. 2021402).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 294>
Accession number:20214010972542
Title:Scientific objectives and payloads of the lunar sample return mission—Chang'E-5
Authors:Zhou, Changyi (1); Jia, Yingzhuo (1); Liu, Jianzhong (2); Li, Huijun (1); Fan, Yu (1); Zhang, Zhanlan (1); Liu, Yang (1, 3); Jiang, Yuanyuan (1); Zhou, Bin (4); He, Zhiping (5); Yang, Jianfeng (6); Hu, Yongfu (7); Liu, Zhenghao (1, 8); Qin, Lang (1, 8); Lv, Bohan (1); Fu, Zhongliang (9); Yan, Jun (10); Wang, Chi (1, 3); Zou, Yongliao (1, 3)
Author affiliation:(1) National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China; (2) Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550002, China; (3) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China; (4) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (5) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (6) Xian Institute of Optic and Precision Mechanic, Chinese Academy of Sciences, Xian; 710119, China; (7) Beijing Institute of Space Mechanics and Electricity, China Academy of Space Technology, Beijing; 100076, China; (8) University of Chinese Academy of Science, Beijing; 100049, China; (9) Lunar Exploration and Space Engineering Center, China National Space Administration, Beijing; 100190, China; (10) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100012, China
Corresponding author:Jia, Yingzhuo(jiayingzhuo@nssc.ac.cn)
Source title:Advances in Space Research
Abbreviated source title:Adv. Space Res.
Volume:69
Issue:1
Issue date:January 1, 2022
Publication year:2022
Pages:823-836
Language:English
ISSN:02731177
E-ISSN:18791948
CODEN:ASRSDW
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In the early morning on December 17, 2020 Beijing time, China's chang'E-5 probe successfully returned to the Earth with 1731 g of lunar samples after completing drilling, shoveling, packaging of lunar soil and scientific exploration on lunar surface. It is the successful completion of the third phase of China's lunar exploration project, namely "circling, landing and returning to the moon". The scientific objectives of CE-5 mission are to carry out in situ investigation and analysis of the lunar landing region, laboratory research and analysis of lunar return samples. This paper analyzes scientific exploration tasks of CE-5 mission conducted on the lunar surface, and carries out the scientific payload system architecture design and individual scientific payload design with the scientific exploration task requirements as the target, and proposes the working mode and main technical index requirements of the scientific payloads. Based on the preliminary geological background study of the Mons Ruemker region which is the landing region of CE-5, the lunar scientific exploration and the laboratory physicochemical characterization of the return samples are of great scientific significance for our in-depth understanding of the formation and evolution of the Earth-Moon system and the chemical evolution history of the lunar surface.<br/></div> © 2021 COSPAR
Number of references:22
Main heading:Lunar missions
Controlled terms:Lunar landing
Uncontrolled terms:CE-5 - Exploration tasks - Lunar samples - Lunar soil - Lunar surface - Sample return - Scientific exploration - Scientific objectives - Scientific payloads - Soil explorations
Numerical data indexing:Mass 1.731E+00kg
DOI:10.1016/j.asr.2021.09.001
Funding details: Number: -, Acronym: CNSA, Sponsor: China National Space Administration;Number: 11941001,41590851,42072337, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: ZDRW-KT-2019-5, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: D020201,D020203,Z181100002918003, Acronym: BMSTC, Sponsor: Beijing Municipal Science and Technology Commission;Number: 2020YFE0202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This research was funded by the National Key R&D Program of China (Grant NO. 2020YFE0202100 ), the Key Research Program of the Chinese Academy of Sciences , Grant NO. ZDRW-KT-2019-5 , the National Science Foundation of China (Grant No. 41590851 , 11941001 , 42072337 ), the Beijing Municipal Science and Technology Commission (Grant No. Z181100002918003 ), and by the Pre-research project on Civil Aerospace Technologies No. D020201 and No. D020203 funded by China National Space Administration (CNSA).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 295>
Accession number:20222112149619
Title:A Laboratory Open-Set Martian Rock Classification Method Based on Spectral Signatures
Authors:Yang, Juntao (1, 2); Kang, Zhizhong (3, 4); Yang, Ze (3, 4); Xie, Juan (3, 4); Xue, Bin (5); Yang, Jianfeng (5); Tao, Jinyou (5)
Author affiliation:(1) College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao; 266590, China; (2) School of Land Science and Technology, China University of Geosciences, Beijing; 100083, China; (3) School of Land Science and Technology, Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, Haidian, Beijing; 100083, China; (4) Subcenter of International Cooperation and Research on Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education of the People's Republic of China, Haidian, Beijing; 100083, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Kang, Zhizhong(zzkang@cugb.edu.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Article number:4601815
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Rocks are one of the major surface features of Mars. The accurate characterization of the chemical and mineralogical composition of Martian rocks would yield significant evolutionary information about relevant geological processes and exobiological exploration. Many existing rock recognition systems generally assume that all testing classes are known during training. Over real planetary surfaces, the autonomous recognition system is likely to encounter an unknown category of rock that is crucial to the performance of the rock classification task. Therefore, we develop an open-set Martian rock-type classification framework based on their spectral signatures, with the subgoal of new/unknown rock-type recognition and category-incremental learning for expanding the recognition model. First, the spectral signatures of rock samples are captured to characterize their mineralogical compositions and physical properties, which serves as the input of the developed framework. To further produce the highly discriminative feature representation from the original spectral signatures, a transformer architecture integrated with contrastive learning is constructed and trained in an end-to-end manner to force instances of the same class to remain close-by while pushing those of a dissimilar class farther apart. Following this, according to the extreme value theorem (EVT), category-specific distance distribution analysis is conducted to detect and identify new/unknown types of rock samples due to the isolated characteristics of new/unknown rock samples in the latent feature space. Finally, the recognition model is incrementally updated to learn these identified 'unknown' samples without forgetting previously known categories when the associated labels are progressively obtained. The multispectral camera, a duplicated payload of the counterpart onboard the Zhurong rover, is used as the multispectral sensor for capturing the spectral information of the laboratory rock dataset shared by the National Mineral Rock and Fossil Specimens Resource Center for both qualitative and quantitative evaluations. Experimental results indicate the effectiveness and robustness of the developed in situ analysis framework.<br/></div> © 1980-2012 IEEE.
Number of references:80
Main heading:Weibull distribution
Controlled terms:Moon - Minerals - Topography - Interplanetary spacecraft - Rocks - Rovers - Chemical analysis
Uncontrolled terms:Contrastive learning - Mars - Martian rocks - Open-set rock classification - Planetary-exploration missions - Rock classification - Space vehicles - Spectral signature - Task analysis - Transformer
Classification code:482.2 Minerals - 655.1 Spacecraft, General - 657.2 Extraterrestrial Physics and Stellar Phenomena - 922.2 Mathematical Statistics - 951 Materials Science
DOI:10.1109/TGRS.2022.3175996
Funding details: Number: D020103, Acronym: -, Sponsor: -;Number: -, Acronym: NDSEG, Sponsor: National Defense Science and Engineering Graduate;Number: 41872207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 871149, Acronym: -, Sponsor: Horizon 2020;Number: 2019YFE0123300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: Z191100004319001, Acronym: -, Sponsor: Beijing Science and Technology Planning Project;
Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2019YFE0123300, in part by the National Natural Science Foundation of China under Grant 41872207, in part by the National Defense Science and Engineering through the Civil Aerospace Technology Advance Research Project under Grant D020103, in part by the Beijing Science and Technology Project under Grant Z191100004319001, and in part by the European Union's Horizon 2020 Research and Innovation Programme under Grant 871149
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 296>
Accession number:20220305894
Title:Scalable colored sub-ambient radiative coolers based on a polymer-Tamm photonic structure
Authors:Huang, Tianzhe (1, 3); Chen, Qixiang (2); Huang, Jinhua (1); Lu, Yuehui (1); Xu, Hua (2); Zhao, Meng (4); Xu, Yao (5); Song, Weijie (1)
Author affiliation:(1) Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo; 315201, China; (2) School of Physical Science and Technology, Ningbo University, Ningbo; 315211, China; (3) Nano Science and Technology Institute, University of Science and Technology of China, Suzhou; 215123, China; (4) Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, Suzhou University of Science and Technology, Suzhou; 215009, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'An; 710119, China
Corresponding authors:Lu, Yuehui(yhlu@nimte.ac.cn); Song, Weijie(weijiesong@nimte.ac.cn)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:July 22, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Daytime radiative coolers cool objects below the air temperature without any electricity input, while most of them are limited by a silvery or whitish appearance. Colored daytime radiative coolers (CDRCs) with diverse colors, scalable manufacture, and sub-ambient cooling have not been achieved. We introduce a polymer-Tamm photonic structure to enable a high infrared emittance and an engineered absorbed solar irradiance, governed by the quality factor (Q-factor). We theoretically determine the theoretical thresholds for sub-ambient cooling through yellow, magenta, and cyan CDRCs. We experimentally fabricate and observe a temperature drop of 2.6-8.8 °C on average during daytime and 4.0-4.4 °C during nighttime. Furthermore, we demonstrate a scalable-manufactured magenta CDRC with a width of 60 cm and a length of 500 cm by a roll-to-roll deposition technique. This work provides guidelines for large-scale CDRCs and offers unprecedented opportunities for potential applications with energy-saving, aesthetic, and visual comfort demands.<br/></div> © 2022, CC BY.
Number of references:34
Main heading:Energy conservation
Controlled terms:Cooling systems - Q factor measurement - Radiative Cooling
Uncontrolled terms:Air temperature - Ambients - Colored daytime radiative cooler - Passive radiative cooling - Photonic structure - Radiative cooling - Sub-ambient - Sub-ambient cooling - Tamm - Thermal emitter
Classification code:525.2 Energy Conservation - 641.2 Heat Transfer - 942.2 Electric Variables Measurements
Numerical data indexing:Size 5.00E+00m, Size 6.00E-01m, Temperature 2.756E+02K to 2.818E+02K, Temperature 2.77E+02K to 2.774E+02K
DOI:10.48550/arXiv.2207.10957
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2207.10957v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 297>
Accession number:20230213368779
Title:Analysis and experiment of small target detection in high speed flow field of near space
Title of translation:近空间高速流场环境小目标探测分析与试验
Authors:Guo, Huinan (1); Ma, Yingjun (1); Wang, Hua (1); Peng, Jianwei (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Ma, Yingjun
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:12
Issue date:December 2022
Publication year:2022
Article number:20220218
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">With the deepening of space security and application exploration, the target-detectability of space vehicle in near space has become a core issue of research. For some multi-dimensional information of target, such as shape, spectrum and motion characteristics, can be directly captured by optical imaging detection device, optical detection has become an important means of space imaging and target detection. Under the conditions of atmospheric density, pressure and atmospheric convection in near space, imaging quality and detection range of optical detection device installed in high-speed aircraft could be affected seriously. By using target detection model with three analysis elements (imaging system, atmospheric transmission system and target-background system) and the theory of aero-optical effect, evaluation equation of aero-optical effect for high speed flow field has been established, to analyze imaging performance of typical scenes such as earth and space background. A ground verification test of target detection in high speed flow field has also been designed. The experimental results show that it’s an effective way for detecting plume flow of high-speed space targets by using short wave infrared detector (SWIR: 900-1 700 nm) with quartz window (with thickness of more than 10 mm). Meanwhile, by reducing exposure time of camera, optimizing exposure control strategy and selecting optical filter, stray light in background and aero-optical effect can be effectively suppressed.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:9
Main heading:Infrared radiation
Controlled terms:Aircraft detection - Earth (planet) - Flow fields - Stray light
Uncontrolled terms:Aerooptical effects - Detection device - High-speed flow fields - Imaging detections - Near space - Optical detection - Small target detection - Space Imaging - Space targets - Targets detection
Classification code:631.1 Fluid Flow, General - 716.2 Radar Systems and Equipment - 741.1 Light/Optics
Numerical data indexing:Size 1.00E-02m, Size 7.00E-07m
DOI:10.3788/IRLA20220218
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 298>
Accession number:20221912092027
Title:Towards Handling Sudden Changes in Feature Maps during Depth Estimation
Authors:Xue, Yao (1); Cao, Yu (2); Feng, Xubin (3); Xie, Meilin (3); Li, Ke (4); Zhang, Xingjun (5); Qian, Xueming (6)
Author affiliation:(1) School of Information and Communications Engineering, Xi'an Jiaotong University, 12480 Xi'an, China, 710049; (2) Space Precision Measurement Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 12381 Beijing, Beijing, China; (3) Space Precision Measurement Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 12381 Xi'an, China; (4) School of Software Engineering, Xi'an Jiaotong University, 12480 Xi'an, Shaanxi, China; (5) Computer Science & Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China, 710049; (6) School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China, 710049
Source title:IEEE Transactions on Multimedia
Abbreviated source title:IEEE Trans Multimedia
Issue date:2022
Publication year:2022
Language:English
ISSN:15209210
E-ISSN:19410077
CODEN:ITMUF8
Document type:Article in Press
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Depth estimation aims to predict depth map from RGB images without high cost equipments. Deep learning based depth estimation methods have shown their effectiveness. However in existing methods, depth information is represented by a per-pixel depth map. Such depth map representation is fragile facing different kinds of depth changes. This paper proposes a Compressive Sensing based Depth Representation (CSDR) scheme, which formulates the problem of depth estimation in pixel space into the task of fixed-length vector regression in representation space. In this way, deep model training errors will not directly interfere depth estimation, and distortions in estimated depth maps can be restrained in the greatest extent. In addition, we improve depth estimation from two other aspects: model structure and loss function. To capture the features in different scales, we propose a Multiscale Encoder \& Multiscale Decoder (MEMD) structure as the vector regression model. To further deal with depth change, we also modify the loss function, where the curvature difference between ground truth and estimation is directly incorporated. With the support of CSDR, MEMD and the curvature loss, the proposed approach achieves superior performance on a challenging depth estimation dataset: NYU-Depth-v2. A range of experiments support our claim that regression in CSDR space performs better than traditionally direct depth map estimation in pixel space.<br/></div> IEEE
Main heading:Semantics
Controlled terms:Edge detection - Deep learning - Pixels - Vector spaces - Decoding - Regression analysis
Uncontrolled terms:Compressive sensing - Depth changes - Depth Estimation - Depth representation - Depthmap - Image edge detection - Loss functions - Multi-scale features - Representation space - Task analysis
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 921 Mathematics - 922.2 Mathematical Statistics
DOI:10.1109/TMM.2022.3171400
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 299>
Accession number:20224012819015
Title:Design of Real-time Target Detection System in CCD Vertical Target Coordinate Measurement
Authors:Zhang, Xin (1); Ding, Lu (1); Xu, Zhaohui (1); Liu, Hui (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Machinery of Cas, Xi'an, China
Corresponding author:Zhang, Xin(zhangxin@opt.ac.cn)
Source title:2022 3rd International Conference on Information Science, Parallel and Distributed Systems, ISPDS 2022
Abbreviated source title:Int. Conf. Inf. Sci., Parallel Distrib. Syst., ISPDS
Part number:1 of 1
Issue title:2022 3rd International Conference on Information Science, Parallel and Distributed Systems, ISPDS 2022
Issue date:2022
Publication year:2022
Pages:266-270
Language:English
ISBN-13:9781665487474
Document type:Conference article (CA)
Conference name:3rd International Conference on Information Science, Parallel and Distributed Systems, ISPDS 2022
Conference date:July 22, 2022 - July 24, 2022
Conference location:Guangzhou, China
Conference code:182592
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">High speed dim and small target detection is an important technology in CCD vertical target coordinate measurement. Its difficulty lies in the high frame rate real-time image processing speed requirements, weak and small target capture rate and extraction accuracy is not high [1]. In order to solve these problems, FPGA is designed and applied as the core of embedded hardware platform, and high-efficiency parallel operation, background iteration and false target detection algorithm are used to realize the real-time detection of high-speed weak and small targets in CDD images with a frame rate of 4096 lines up to 50KHz. The time delay of target acquisition and output measurement results is less than 10 ms, and the real-time performance is very good. In a certain application, under the background illumination of sky, the capture rate of dim high-speed projectile (5.8 mm projectile) can reach 100%, and the measurement accuracy σ is less than 13 mm, and the acquisition rate test of targets larger than 5.8 mm reaches a higher standard.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Field programmable gate arrays (FPGA)
Controlled terms:Efficiency - Image processing - Integrated circuit design - Iterative methods - Projectiles - Signal detection - Speed
Uncontrolled terms:50 KHz - Capture rate - Coordinate measurements - High Speed - Higher efficiency - Small targets - Target coordinates - Vertical target coordinate measurement - Vertical targets - Weak targets
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 721.2 Logic Elements - 723.2 Data Processing and Image Processing - 913.1 Production Engineering - 921.6 Numerical Methods
Numerical data indexing:Percentage 1.00E+02%, Size 1.30E-02m, Size 5.80E-03m, Time 1.00E-02s
DOI:10.1109/ISPDS56360.2022.9874125
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 300>
Accession number:20231613890654
Title:Research and development of the physical system for horizontal counter-propagating atom interferometric gyroscope
Title of translation:水平对抛式原子干涉陀螺物理系统研制<sup>∗</sup>
Authors:Wang, Xianhua (1); Jia, Sen (1); Wang, Yiding (1)
Author affiliation:(1) Department of Photoelectric Technology, Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi′an; 710119, China
Corresponding author:Wang, Xianhua(xhwang@opt.ac.cn)
Source title:Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
Abbreviated source title:Yi Qi Yi Biao Xue Bao
Volume:43
Issue:12
Issue date:December 2022
Publication year:2022
Pages:87-95
Language:Chinese
ISSN:02543087
CODEN:YYXUDY
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Based on matter wave and Sagnac effect, the angular velocity and acceleration in horizontal direction of the carrier can be measured by the horizontal atom interferometric gyroscope. The physical system is the key subsystem of a gyroscope, which provides the circumstances of ultrahigh vacuum with special magnetic distributions and optical paths for control and detection of atom states by lasers. To realize of atom interferometry and satisfy the requirements of high-precision measurement, the principles of atom interferometric gyroscope operation are analyzed, and the functional requirements and basic mechanical components are clarified. Based on the theoretical analysis, the key specifications including vacuum degrees and magnetic distributions of each functional area are proposed. Therefore, a physical system of atom interferometric gyroscope is constructed, the measurement results reveal that the vacuum held steady at 10<sup>-8</sup> Pa, and the diameter of cold atom cloud generating from this system is 6 mm, with the quantity of 8×10<sup>9</sup> and temperature of 12.8 μK, which satisfies the requirement of the subsequent experiments.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:36
Main heading:Atoms
Controlled terms:Angular velocity - Atom lasers - Gyroscopes - Interferometry
Uncontrolled terms:0 引 言 - Atom interferometric measurement - Counterpropagating - Interferometric measurement - Interferometrics - Magnetic distributions - Matter waves - Physical systems - Research and development - Sagnac effect
Classification code:744.1 Lasers, General - 931.3 Atomic and Molecular Physics - 941.4 Optical Variables Measurements
Numerical data indexing:Pressure 1.00E+01Pa to 8.00E+00Pa, Size 6.00E-03m
DOI:10.19650/j.cnki.cjsi.J2210108
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 301>
Accession number:20224112865478
Title:Fully connected aperture array design of the segmented planar imaging system
Authors:Liu, Gang (1, 2); Wen, Desheng (1, 2); Fan, Wenhui (1, 2, 3); Song, Zongxi (1, 2); Sun, Zhonghan (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Province, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Song, Zongxi(songxi@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:18
Issue date:September 15, 2022
Publication year:2022
Pages:4596-4599
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with the traditional imaging systems, segmented planar imaging technology has the advantages of low mess, small size, and low power in the same resolution situation. To obtain relatively complete frequency domain coverage, the lenslet array requires a large number of lenslets, and the photonic integrated circuit board requires a large number of optical devices, which limits the application and development of the segmented planar imaging technology. In this paper, we introduce a novel, to the best of our knowledge, design of the photonic integrated circuit to ensure that each lenslet in the lenslet array can form a baseline with any other lenslets. This breaks the barrier between segmented planar imaging technology and the traditional synthetic aperture, giving segmented planar imaging technology a sufficient number of frequency domain samples and a concise photonic integrated circuit structure.<br/></div> © 2022 Optica Publishing Group.
Number of references:18
Main heading:Frequency domain analysis
Controlled terms:Imaging systems - Integrated circuit design - Photonic devices - Photonic integration technology - Synthetic apertures
Uncontrolled terms:Aperture arrays - Array design - Circuit boards - Frequency domains - Imaging technology - Lenslet array - Lenslets - Low Power - Photonics Integrated Circuits - Planar imaging
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.2 Radar Systems and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 921.3 Mathematical Transformations
DOI:10.1364/OL.465133
Funding details: Number: 1188000111, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:The Youth Innovation Promotion Association (No. 1188000111).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 302>
Accession number:20231513864397
Title:Seeing Clear before Visual Tracking
Authors:Zhang, Ximing (1); Wang, Yuanbo (1); Zhao, Hui (1); Fan, Xuewu (1)
Author affiliation:(1) Space Optical Research Lab, Xi'an Institute of Optics and Precision Mechanics, Cas, Xi'an, China
Source title:2022 IEEE 8th International Conference on Computer and Communications, ICCC 2022
Abbreviated source title:IEEE Int. Conf. Comput. Commun., ICCC
Part number:1 of 1
Issue title:2022 IEEE 8th International Conference on Computer and Communications, ICCC 2022
Issue date:2022
Publication year:2022
Pages:1916-1921
Language:English
ISBN-13:9781665450515
Document type:Conference article (CA)
Conference name:8th IEEE International Conference on Computer and Communications, ICCC 2022
Conference date:December 9, 2022 - December 12, 2022
Conference location:Virtual, Online, China
Conference code:187407
Sponsor:Institute of Electrical and Electronics Engineers (IEEE); Sichuan Institute of Electronics
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we propose a two-stages visual tracking method mainly based on two branches including image deblurring and visual tracking. Our main motivation is to achieve the robust visual tracking when the tracker is suffering fast motion blur. Firstly, we present the hierarchical model based on Spatial Pyramid Matching that performs the fine-to-coarse deblurring and exploits localized-to-coarse operations. After achieving the deblurred images, the proposed method use transformer framework with spatial and channel attention for extracting features in order to obtain the spatial and channel features simultaneously to obtain the fast visual tracking with the balance of accuracy and robustness. We first train the one-stage deblurring network in the dataset of Gopro. Then, we train the second stage visusal tracking branch. Lastly, we conduct extensive ablation studies to demonstrate the effectiveness of the proposed tracker, which obtains currently the outperforming results on large tracking benchmarks, we also validate the effectiveness of our method against the fast motion blurring.<br/></div> © 2022 IEEE.
Number of references:18
Main heading:Image enhancement
Controlled terms:Computer vision - Hierarchical systems - Motion analysis
Uncontrolled terms:Deblurring - Fast motion blur - Fast motions - Image deblurring - Image deblurring network - Motion blur - Robust visual tracking - Tracking method - Visual Tracking - Visual transformer
Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications - 741.2 Vision - 961 Systems Science
DOI:10.1109/ICCC56324.2022.10066016
Funding text:ACKNOWLEDGMENT This work is supported by Major Project on Remoting Sensing Visual Detection under Grant No.1ZJ22-008-III.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 303>
Accession number:20222812344750
Title:High-Peak-Power Acoustic-Optic Q-Switched Solid-State Laser with Hermite-Gaussian Modes
Title of translation:高峰值功率声光调Q厄米-高斯模固体激光器
Authors:Lian, Tianhong (1); Yang, Lei (1); Zhu, Jiahua (1); Kou, Ke (1); Zhang, Zeyu (1); Jiao, Mingxing (1); Wang, Shiyu (2)
Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China
Corresponding author:Lian, Tianhong(tianhongl@126.com)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:42
Issue:7
Issue date:April 10, 2022
Publication year:2022
Article number:0714001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In an off-axis pumped laser, the off-axis thermal lens effect gives rise to the Hermite-Gaussian (HG) mode hopping. Namely, with the pump power increasing, the running laser turns from a single HG mode into mixed modes and then into the adjacent low-order HG mode. Our analysis shows that this is due to the decrease in the effective off-axis amount caused by the off-axis thermal lens-induced optic axis shift of the resonant cavity for off-axis pumping. The experimental results demonstrate that a higher-order mode has a lower pump power for mode hopping. Moreover, we can return the laser to the original HG mode by modifying the off-axis amount in practice. A larger adjustment is required as the pump power increases. We experimentally demonstrate pulsed outputs at a high peak power in sixteen HG modes, from mode HG<inf>1,0</inf> to mode HG<inf>16,0</inf>. At a repetition rate of 10 kHz, a pulse width of 32 ns and a peak power of 4.1 kW are realized for the mode HG<inf>1,0</inf>, and a pulse width of 79 ns and a peak power of 0.7 kW are realized for the mode HG<inf>16,0</inf>.<br/></div> © 2022, Chinese Lasers Press. All right reserved.
Number of references:24
Main heading:Solid state lasers
Controlled terms:Gaussian beams - Pulse repetition rate - Pumping (laser)
Uncontrolled terms:Gaussians - Hermite - Hermite Gaussian beams - Hermite Gaussian modes - High peak power - Mode-hopping - Off axis pumping - Off-axis - Pump power - Solid-state lasers
Classification code:711 Electromagnetic Waves - 744.1 Lasers, General - 744.4 Solid State Lasers
Numerical data indexing:Frequency 1.00E+04Hz, Power 4.10E+03W, Power 7.00E+02W, Time 3.20E-08s, Time 7.90E-08s
DOI:10.3788/AOS202242.0714001
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 304>
Accession number:20220091664
Title:Large Dispersion-Managed Broadband High-Energy Fiber Femtosecond Laser System with Sub 300 Fs Pulses and High Beam Quality Output
Authors:Li, Feng (1); Zhao, Wei (1); Wang, Yishan (1); Li, Dongjuan (1); Li, Qianglong (1); Yang, Yang (1); Wen, Wenlong (1); Song, Dongdong (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Li, Feng(lifeng@opt.ac.cn)
Source title:SSRN
Issue date:April 26, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">We experimentally demonstrate a high-energy sub 300 fs polarization maintaining fiber chirped pulse amplification (CPA) system. The preamplifier is a monolithic fiberized system that uses two cascaded temperature-assisted dispersion-tuning broadband chirped fiber Bragg gratings (CFBGs) with a reflected bandwidth of 20 nm as stretchers. To make full use of the stretcher to lower the system’s nonlinearity accumulation, a homemade mode locked fiber laser with a spectral width of 14.8 nm (full width at half maximum) is selected as the seeder to offer a stretched pulse width of 1.69 ns. The main amplifier is based on a one-stage simple Yb:YAG single crystal fiber amplifier with an amplified output power of 40.6 W at a repetition rate of 200 kHz, and the beam quality is conserved in a single mode beam profile with beam quality of 1.246 and 1.142 in the horizontal direction and vertical direction, respectively. During amplification, the spectral gain narrowing effect is observed. To achieve the high-speed switch of the laser, an acoustical optical modulator (AOM) is inserted before the compressor to achieve high-speed turn-on/off control. The compressor is based on a diffraction grating pair with a groove density of 1600 line/mm to offer a dispersion match with the stretcher of the CFBGs. With the CFBG’s fine-tuned capacity of second-order dispersion and higher-order dispersion, the compressed average power of 29.6 W and pulse duration of 278 fs, corresponding to a pulse energy of 148 µJ and a peak power of 532 MW, is obtained. The beam quality is well conserved after compression, and the beam quality is 1.250 and 1.196 in the horizontal direction and vertical direction, respectively. A power fluctuation of 0.1% (root mean square) and a beam pointing drift of 8.47 µrad/°C over 8 hours are realized. This high peak power and high beam quality femtosecond laser is promising in science and industrial applications.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:26
Main heading:Fiber lasers
Controlled terms:Chirp modulation - Crystal whiskers - Expansion - Fiber amplifiers - Fiber Bragg gratings - Light modulators - Optical pumping - Polarization-maintaining fiber - Pulse repetition rate - Stretchers - Ultrashort pulses - Yttrium aluminum garnet
Uncontrolled terms:Beams quality - Broadband femto-second lasers - Broadband femtosecond laser amplification - Chirped fibre Bragg gratings - Energy - High beam quality - Laser amplification - Silicate glass fibers - Single crystal fiber - Vertical direction
Classification code:462.1 Biomedical Equipment, General - 716 Telecommunication; Radar, Radio and Television - 741.1.2 Fiber Optics - 744.1 Lasers, General - 744.4 Solid State Lasers - 804.2 Inorganic Compounds - 933.1.1 Crystal Lattice - 951 Materials Science
Numerical data indexing:Frequency 2.00E+05Hz, Percentage 1.00E-01%, Power 2.96E+01W, Power 4.06E+01W, Power 5.32E+08W, Size 1.48E-08m, Size 2.00E-08m, Size 2.90068E-02m, Size 3.03784E-02m, Size 3.16484E-02m, Size 3.175E-02m, Time 1.69E-09s, Time 2.78E-13s, Time 2.88E+04s, Time 3.00E-13s
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4094138
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 305>
Accession number:20222712329921
Title:Performance evaluation of silicon-chip-based mid-infrared Kerr optical frequency combs with ridge cross section
Authors:Wen, Jin (1, 2, 3, 4); Qin, Weijun (2); Sun, Wei (2); He, Chenyao (2); Xiong, Keyu (2); Liang, Bozhi (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Science, Xi'an Shiyou University, Xi'an; 710065, China; (3) Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection, Xi'an; 710065, China; (4) Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas wells, Xi'an; 710065, China
Corresponding author:Wen, Jin(wenjin@xsyu.edu.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:266
Issue date:September 2022
Publication year:2022
Article number:169575
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">We present a complementary metal-oxide-semiconductor (CMOS) compatible platform for on-chip frequency comb generation in the mid-infrared region based on a silicon-on-insulator (SOI) microring resonator with ridge cross section. Flat dispersion tailoring is performed with dispersion variation of 4.04 × 10<sup>−6</sup> ps/nm/km by adjusting the geometry parameter and the low-loss SOI microring resonator with total quality factor (Q) up to 10<sup>6</sup> can be realized at wavelengths from 3.3 to 3.6 µm. Furthermore, the thresholdless frequency combs consisting of 50 comb lines spanning from 3.1 to 4.0 µm (over 900 nm) can be realized using SOI microring resonator with 50 mW pump power. Besides, the study shows that the frequency interval of the comb is related to the selection of the dual-pumped wavelength. The influences of the coupling coefficient and the radius of microring on the bandwidth of mid-infrared OFC are also investigated numerically which shows that remarkable enhancement of mid-infrared OFC bandwidth can reach 449 nm when the coupling coefficient varies from 0.012 to 0.05. This research work is instructive for realizing highly integrated photonics and achieving the experimental generation of mid-infrared optical frequency combs, which could enable substantial progress in spectroscopy applications.<br/></div> © 2022 Elsevier GmbH
Number of references:42
Main heading:Bandwidth
Controlled terms:CMOS integrated circuits - Dispersion (waves) - Four wave mixing - Infrared devices - Metals - Natural frequencies - Optical materials - Optical resonators - Silicon on insulator technology
Uncontrolled terms:Cascaded four-wave mixing - Coupling coefficient - Frequency combs - Kerr frequency comb - Microrings - Midinfrared - Optical frequency combs - Optical-frequency combs - Silicon on insulator - Silicon-on-insulator microring resonator
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems
Numerical data indexing:Power 5.00E-02W, Size 4.49E-07m, Size 9.00E-07m, Time 4.04E-18s
DOI:10.1016/j.ijleo.2022.169575
Funding details: Number: YCS19211035, Acronym: -, Sponsor: -;Number: 2018KJXX-042, Acronym: -, Sponsor: -;Number: 61505160, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST202108, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2019JM-084, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China under Grant No. 61505160, the Innovation Capability Support Program of Shaanxi (Program No. 2018KJXX-042), the Natural Science Basic Research Program of Shaanxi (Program No. 2019JM-084), the State Key Laboratory of Transient Optics and Photonics (SKLST202108), the Graduate Innovation and Practical Ability Training Project of Xi'an Shiyou University (YCS19211035).This work was supported by the National Natural Science Foundation of China under Grant No. 61505160 , the Innovation Capability Support Program of Shaanxi (Program No. 2018KJXX-042 ), the Natural Science Basic Research Program of Shaanxi (Program No. 2019JM-084 ), the State Key Laboratory of Transient Optics and Photonics ( SKLST202108 ), the Graduate Innovation and Practical Ability Training Project of Xi’an Shiyou University ( YCS19211035 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 306>
Accession number:20223312571189
Title:Image Enhancement Technology in Pavement Disease Detection System
Authors:Li, Xuefeng (1); Zhou, Zuofeng (2); Wu, Qingquan (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Cas, University of Chinese Academy of Sciences, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics, Cas, Industrial Development Co., Ltd, Xi'an, China
Corresponding author:Zhou, Zuofeng(zfzhou@opt.ac.cn)
Source title:2022 IEEE 2nd International Conference on Electronic Technology, Communication and Information, ICETCI 2022
Abbreviated source title:IEEE Int. Conf. Electron. Technol., Commun. Inf., ICETCI
Part number:1 of 1
Issue title:2022 IEEE 2nd International Conference on Electronic Technology, Communication and Information, ICETCI 2022
Issue date:2022
Publication year:2022
Pages:547-549
Language:English
ISBN-13:9781728181158
Document type:Conference article (CA)
Conference name:2nd IEEE International Conference on Electronic Technology, Communication and Information, ICETCI 2022
Conference date:May 27, 2022 - May 29, 2022
Conference location:Changchun, China
Conference code:181343
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Efficient pavement bad location detection and repair is essential to prolong the use time of roads. However, traditional manual detection methods are extremely inefficient and can no longer meet the requirements of inspecting a large number of roads. When using deep learning technology for road disease detection, it is found that low-illuminance images will affect the detection accuracy due to low contrast. Therefore, before training and testing the deep learning model, the original image needs to be preprocessed to improve the image quality. First, bilateral filtering is used instead of Gaussian filtering to estimate the illuminance of the original image; Then the reflection component is get according to the principle of Retinex algorithm, and the reflection image is quantized; Finally, the image is subjected to illumination compensation. The results of comparative experiments display that the ours algorithm can retain the characteristic details of road diseases and eliminate the unevenness of the image brightness distribution while improving the contrast of the road image.<br/></div> © 2022 IEEE.
Number of references:5
Main heading:Image enhancement
Controlled terms:Deep learning - Lighting - Pavements
Uncontrolled terms:Detection and repairs - Detection methods - Detection system - Disease detection - Image enhancement technologies - Location detection - Original images - Pavement diease - Retinex - Road disease
Classification code:461.4 Ergonomics and Human Factors Engineering
DOI:10.1109/ICETCI55101.2022.9832258
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 307>
Accession number:20221712027361
Title:Alzheimer's level classification by 3D PMNet using PET/MRI multi-modal images
Authors:Li, Chao (1, 2, 3); Song, Liyao (4); Zhu, Guangpu (1, 2, 3); Hu, Bingliang (1, 3); Liu, Xuebin (1, 3); Wang, Quan (1, 3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) School of Information and Communications Engineering, Xi'an Jiaotong University, Xi'an, China
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Abbreviated source title:IEEE Int. Conf. Electr. Eng., Big Data Algorithms, EEBDA
Part number:1 of 1
Issue title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Issue date:2022
Publication year:2022
Pages:1068-1073
Language:English
ISBN-13:9781665416061
Document type:Conference article (CA)
Conference name:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Conference date:February 25, 2022 - February 27, 2022
Conference location:Changchun, China
Conference code:178616
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The accurate diagnosis of Alzheimer's disease (AD) has an important impact on early treatment. Positron emission tomography (PET) and magnetic resonance imaging (MRI) are popular imaging methods and are used to facilitate the identification and evaluation of AD. In this paper, we proposed a VGG-style 3D convolutional neural network (3D CNN) model, which is named 3D PET-MRI Net (3D PMNet), and it uses DiffGrad optimizer to speed up the convergence of the model and Focalloss function to improve the classification performance of unbalanced data processing. The multi-modal feature information of 3D MRI and PET images can be extracted using the 3D PMNet model, which provides convenience for AD diagnosis. Tenfold cross-validation was performed on the data of each patient in the data set to determine the group classification. The results showed that the proposed method achieves 97.49%, 81.25%, and 76.67% accuracy in the classification tasks of AD: NC, AD: MCI, and NC: MCI, respectively. Our PMNet reached 72.55% accuracy in AD: NC: MCI three group classification, which is significantly better than the other reported network models.<br/></div> © 2022 IEEE.
Number of references:18
Main heading:Magnetic resonance imaging
Controlled terms:Computer aided diagnosis - Image classification - Neurodegenerative diseases - 3D modeling - Positron emission tomography - Classification (of information) - Convolutional neural networks - Data handling
Uncontrolled terms:3d convolutional neural network - Alzheimers disease - Convolutional neural network - Identification and evaluation - Images classification - Imaging method - Multi-modality - Multimodal images - Neural network model - Positron emission tomography/magnetic resonance imaging
Classification code:461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 701.2 Magnetism: Basic Concepts and Phenomena - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 746 Imaging Techniques - 903.1 Information Sources and Analysis
Numerical data indexing:Percentage 7.255E+01%, Percentage 7.667E+01%, Percentage 8.125E+01%, Percentage 9.749E+01%
DOI:10.1109/EEBDA53927.2022.9744769
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:ACKNOWLEDGMENT The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key Laboratory of Biomedical Spectroscopy of Xi'an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences. "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 308>
Accession number:20231113742344
Title:Two-Directional Two-Dimensional PCA: An Efficient Face Recognition Method for Thermal Infrared Images
Authors:Gao, Chi (1, 2); Zhang, Xinming (1, 2); Wang, Hui (1, 2); Song, Liyao (3); Hu, Bingliang (1); Wang, Quan (1)
Author affiliation:(1) Xi'an Institute of Optics and PrecisionMechanics of the Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) The School of Information and Communications Engineeringm, Xi'an Jiaotong University, Xi'an, China
Corresponding authors:Hu, Bingliang(hbl@opt.ac.cn); Wang, Quan(wangquan@opt.ac.cn)
Source title:2022 5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Abbreviated source title:Int. Conf. Inf. Commun. Signal Process., ICICSP
Part number:1 of 1
Issue title:2022 5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Issue date:2022
Publication year:2022
Pages:185-191
Language:English
ISBN-13:9781665485890
Document type:Conference article (CA)
Conference name:5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Conference date:November 26, 2022 - November 28, 2022
Conference location:Shenzhen, China
Conference code:187041
Sponsor:IEEE; Shenzhen University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with face recognition in the environment of visible light, thermal infrared face recognition has the advantages of being independent of light, working around the clock, and capable of detecting hidden targets easily. In this paper, we propose a thermal infrared face recognition method based on the two-directional two-dimensional PCA (2D2DPCA) and random forest classifier. We compared this with two deep learning networks: Alexnet, Three-dimensional Convolutional Neural Networks (3DCNN), and applied these with two databases: the Terravic Facial IR database (with different facial angles) and the NVIE database (with various emotional expressions). Among these methods, the accuracy of face recognition with the 2D2DPCA method achieves the best recognition effect, it reached 99.92% and 99.97% in both databases, respectively. We statistically verified that our method could not only accurately and robustly recognize thermal infrared faces with large variations in angle and expression, but also greatly reduce computational complexity and data dimension, improving the speed of face recognition. With the two sample sets tested, our work has demonstrated that 2D2DPCA has excellent potential for facial image compression and may broaden thermal face recognition applications.<br/></div> © 2022 IEEE.
Number of references:34
Main heading:Face recognition
Controlled terms:Convolutional neural networks - Database systems - Deep learning - Emotion Recognition - Image compression - Infrared imaging - Infrared radiation - Learning systems
Uncontrolled terms:3DCNN - Alexnet - Efficient faces - Face recognition methods - Infrared face recognition - Thermal infrared images - Thermal-infrared - Two-dimensional PCA - Two-directional - Two-directional two-dimensional PCA
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 723.3 Database Systems - 741.1 Light/Optics - 746 Imaging Techniques
Numerical data indexing:Percentage 9.997E+01%, Percentage 9.992E+01%
DOI:10.1109/ICICSP55539.2022.10050541
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: Y855W31213,Y955061213, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:ACKNOWLEDGMENT The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key laboratory of Biomedical Spectroscopy of Xi'an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences under grant number Y855W31213, Y955061213. Finally, the authors would like to thank the anonymous reviewers for their constructive advice.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 309>
Accession number:20220911728758
Title:Semisupervised Consistent Projection Metric Learning for Person Reidentification
Authors:Sun, Bangyong (1); Ren, Yutao (2); Lu, Xiaoqiang (1)
Author affiliation:(1) School of Printing, Packaging and Digital Media, Xi'An University of Technology, Xi'an, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:52
Issue:2
Issue date:February 1, 2022
Publication year:2022
Pages:738-747
Language:English
ISSN:21682267
E-ISSN:21682275
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Person reidentification is a hot topic in the computer vision field. Many efforts have been paid on modeling a discriminative distance metric. However, existing metric-learning-based methods are a lack of generalization. In this article, the poor generalization of the metric model is argued as the biased estimation problem that the independent identical distribution hypothesis is not valid. The verification experimental result shows that there is a sharp difference between the training and test samples in the metric subspace. A semisupervised consistent projection metric-learning method is proposed to ease the biased estimation problem by learning a consistent constrained metric subspace in which the identified pairs are forced to follow the distribution of the positive training pairs. First, a semisupervised method is proposed to generate potential matching pairs from the {k} -nearest neighbors of test samples. The potential matching pairs are used to estimate the distances' distribution center of the positive test pairs. Second, the metric subspace is improved by forcing this estimation to be close to the center of the positive training pairs. Finally, extensive experiments are conducted on five datasets and the results demonstrate that the proposed method reaches the best performance, especially on the rank-1 identification rate.<br/></div> © 2013 IEEE.
Number of references:50
Main heading:k-nearest neighbors
Uncontrolled terms:Biased estimation - Discriminative - Estimation problem - Generalisation - Hot topics - Matchings - Metric learning - Person re identifications - Semi-supervised - Test samples
DOI:10.1109/TCYB.2020.2979262
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 310>
Accession number:20222612272091
Title:Implementation of empirical modified generalized Harvey–Shack scatter model on smooth surface
Authors:Ma, Zhanpeng (1, 2); Wang, Hu (1, 2); Chen, Qinfang (1, 2); Xue, Yaoke (1); Pan, Yue (1, 2); Shen, Yang (1, 2); Yan, Haoyu (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Hu(wanghu@opt.ac.cn)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:39
Issue:7
Issue date:July 2022
Publication year:2022
Pages:1730-1735
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a modified generalized Harvey–Shack model by adding the empirical correction factor related to the scattering angle on the basis of the original theory. The result shows that the modified model reduces the root mean square error (RMSE) from less than 2% to less than 1%, and the relative peak error from less than 50% to less than 20%, which significantly improves the accuracy of scattering prediction. The prediction of the Rayleigh–Rice model is not as good as the Harvey–Shack model. The RMSE of the Rayleigh–Rice model is within 2.5%, and the relative peak error is within 60%.<br/></div> © 2022 Optica Publishing Group
Number of references:29
Main heading:Errors
Controlled terms:Mean square error
Uncontrolled terms:Empirical correction factor - Modified model - Rayleigh - Rice-model - Root mean square errors - Scatter model - Scattering angles - Smooth surface
Classification code:922.2 Mathematical Statistics
Numerical data indexing:Percentage 1.00E00%, Percentage 2.00E+00%, Percentage 2.00E+01%, Percentage 2.50E+00%, Percentage 5.00E+01%, Percentage 6.00E+01%
DOI:10.1364/JOSAB.455182
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 311>
Accession number:20221712027366
Title:Intelligent Classification for Emotional Issues by Deep Learning Network on EEG Signal Processing
Authors:Yin, Shaokang (1, 2, 3); Zhu, Feiyu (1, 2, 3); Wei, Xiaojie (1, 2, 3); Han, Gongen (4); Zhang, Runqi (4); Liu, Xi (1, 2, 3); Hu, Bingliang (1, 3); Wang, Quan (1, 3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi'an, Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an, China; (4) Xi'an Gaoxin No.1 High School, Xi'an, China
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Abbreviated source title:IEEE Int. Conf. Electr. Eng., Big Data Algorithms, EEBDA
Part number:1 of 1
Issue title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Issue date:2022
Publication year:2022
Pages:742-747
Language:English
ISBN-13:9781665416061
Document type:Conference article (CA)
Conference name:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Conference date:February 25, 2022 - February 27, 2022
Conference location:Changchun, China
Conference code:178616
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Identifying the risk of emotional issues is of great significance to the development of adolescents. Electroencephalography (EEG) signals can reflect brain activities, and imply the emotional status, therefore can be used to identify emotional issues. In this study, we designed an experimental paradigm for high school adolescents by displaying emotion-inducing pictures as stimuli and recorded their EEG signals simultaneously. The EEG signals was preprocessed and analyzed. In this paper we applied a convolutional network EEGNet to classify four emotional issues in adolescents: depression symptom, manic symptom, anxiety symptom and the control group. The results showed that the classification accuracy of the four groups can reach 94.24%. In addition, this paper explored using different types of picture stimuli on the classification and reached a result above chance level. This work extended the previous work on the classification of emotional issues to four categories, and achieved a good classification accuracy.<br/></div> © 2022 IEEE.
Number of references:18
Main heading:Electroencephalography
Controlled terms:Biomedical signal processing - Brain - Deep learning - Electrophysiology
Uncontrolled terms:Adolescent - Brain activity - Classification accuracy - EEGNet - Electroencephalography classification - Emotional issue - Higher School - Intelligent classification - Learning network - Signal-processing
Classification code:461.1 Biomedical Engineering - 461.4 Ergonomics and Human Factors Engineering - 461.6 Medicine and Pharmacology - 716.1 Information Theory and Signal Processing
Numerical data indexing:Percentage 9.424E+01%
DOI:10.1109/EEBDA53927.2022.9744774
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:ACKNOWLEDGMENTS The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key laboratory of Biomedical Spectroscopy of Xi'an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences. Special thanks to Wang ZengHuai for coordinating the experimental arrangements.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 312>
Accession number:20225213308841
Title:Design of a Ultra-Stable Low-Noise Space Camera Based on a Large Target CMOS Detector and Image Data Analysis (Open Access)
Authors:Shen, Chao (1, 2); Ma, Caiwen (1); Gao, Wei (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)
Source title:Sensors
Abbreviated source title:Sensors
Volume:22
Issue:24
Issue date:December 2022
Publication year:2022
Article number:9991
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">To detect faint target stars of 22nd magnitude and above, an astronomical exploration project requires its space camera’s readout noise to be less than 5e<sup>−</sup> with long-time working stability. Due to the limitation of satellite, the traditional CCD detector-based camera does not meet the requirements, including volume, weight, and power consumption. Thereby, a low-noise ultra-stable camera based on 9 K × 9 K large target surface CMOS is designed to meet the needs. For the first time, the low-noise ultra-stable camera based on CMOS detector will be applied to space astronomy projects, remote sensing imaging, resource survey, atmospheric and oceanic observation and other fields. In this paper, the design of the camera is introduced in detail, and the camera is tested for several rounds at −40 °C; it also undergoes further testing and data analysis. Tests proved super stability and that the readout noise is lower than 4.5e<sup>−</sup>. Dark current, nonlinearity and PTC indicators meet the requirements of the astronomical exploration project.<br/></div> © 2022 by the authors.
Number of references:20
Main heading:Integrated circuit design
Controlled terms:Cameras - CMOS integrated circuits - Data handling - Image analysis - Information analysis - Remote sensing
Uncontrolled terms:Camera-based - CMOS detectors - Exploration projects - Image data analysis - Low readout noise - Lower noise - Noise spaces - Readout noise - Space cameras - Ultra-stable
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment - 903.1 Information Sources and Analysis
Numerical data indexing:Temperature 3.13E+02K, Temperature 9.00E+00K
DOI:10.3390/s22249991
Funding details: Number: -, Acronym: IMII, Sponsor: Institute of Infection and Immunity;Number: XDA15020604, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Program on Space Science (III) Chinese Academy of Science (CAS) Program, grant number XDA15020604.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 313>
Accession number:20223012422195
Title:Analysis and optimization of shielding in measuring helical gear tooth flank by laser interferometry
Authors:Zhu, Xindong (1); Wang, Zhaohui (2); Yang, Pengcheng (2); Zhang, Pei (1); Wang, Xian (3); Zhao, Zidan (1); Meng, Jinglin (1); Wei, Xiang (4)
Author affiliation:(1) Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'An Jiaotong University, Xi'an; 710049, China; (2) Mechanical and Electrical Engineering College, Xi'An Polytechnic University, Xi'an; 710048, China; (3) School of Mechanical and Precision Instrument Engineering, Xi'An University of Technology, Xi'an; 710048, China; (4) State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'An Jiaotong University, Xi'an; 710049, China
Corresponding author:Zhang, Pei(zhangpei@mail.ustc.edu.cn)
Source title:Measurement Science and Technology
Abbreviated source title:Meas. Sci. Technol.
Volume:33
Issue:10
Issue date:October 2022
Publication year:2022
Article number:105006
Language:English
ISSN:09570233
E-ISSN:13616501
CODEN:MSTCEP
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Phase shifting laser interferometry is an effective method to measure the form error of a helical gear tooth flank. However, during measurement, part of the measurement light is inevitably shielded by an adjacent tooth or its own structure, and thus cannot be captured by the detector, resulting in the inability to collect a complete set of tooth surface shape information. This problem restrains the practicality of measuring a gear tooth flank by laser interferometry. We propose an analysis method and optimal search algorithm for shielding, to collect a complete set of tooth surface information from a measured gear. First, we propose an analysis method for shielding, based on ray-tracing, which allows the measurable region of helical gear tooth flanks with common parameters to be statistically analyzed. The variation law of the main parameters and a measurable region of the common helical gear tooth surface is expounded. Second, in order to obtain the complete interferogram, we propose an optimal search algorithm for shielding, by changing the relative position between the measured gear and the measurement optical system. Finally, relevant simulation and experiments prove that the proposed analysis and optimization methods are feasible. Furthermore, when the oblique incidence method is used to measure the shielded precision complex surface, the proposed methods of analyzing and optimizing shielding can be used for reference, to realize the complete measurement of the measured surface.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:23
Main heading:Learning algorithms
Controlled terms:Alignment - Gear teeth - Laser interferometry - Optical systems - Shielding
Uncontrolled terms:Analyse of shielding - Analysis method - Gear measurements - Helical gear teeth - Oblique incidence - Oblique incidence laser interferometry - Optical simulation - Optimisations - Optimization of shielding - Tooth flank
Classification code:601.1 Mechanical Devices - 601.2 Machine Components - 723.4.2 Machine Learning - 741.3 Optical Devices and Systems - 743.2 Holographic Applications - 744.9 Laser Applications - 941.4 Optical Variables Measurements
DOI:10.1088/1361-6501/ac7a05
Funding details: Number: 300102250506, Acronym: -, Sponsor: -;Number: 2019220614SYS021CG043, Acronym: -, Sponsor: -;Number: 12174301,51905412,91736104, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M683683XB, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2022JM-219, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: xhj032021006-04, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:The authors would like to thank the anonymous reviewers for their comments. This work is supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 51905412, 12174301, and 91736104), and the State Key Laboratory of Applied Optics, the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2022JM-219), the Xi’an Key Laboratory of Modern Intelligent Textile Equipment (Grant No. 2019220614SYS021CG043), the Key Laboratory of Expressway Construction Machinery of Shaanxi Province (Grant No. 300102250506), the Fundamental Research Funds for the Central Universities (Grant No. xhj032021006-04) and the China Postdoctoral Science Foundation (Grant No. 2020M683683XB).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 314>
Accession number:20221111784758
Title:Comprehensive design analysis and verification of space-based short-wave infrared coded spectrometer via curved prism dispersion
Authors:Jia, Xin-Yin (1, 2); Li, Xi-Jie (1); Hu, Bing-Liang (1); Li, Li-Bo (1); Wang, Fei-Cheng (1); Zhang, Zhao-Hui (1); Yang, Ying (1); Ke, Shan-Liang (1); Zou, Chun-Bo (1); Liu, Jia (1); Li, Si-Yuan (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of the Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Fei-Cheng(wangfeicheng@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:8
Issue date:March 10, 2022
Publication year:2022
Pages:2125-2139
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The spaceborne dispersive spectrometer is widely used in environmental, resource, and ocean observations. The coded spectrometer has higher energy advantages than the dispersion spectrometer, so it has great application prospects. In the current study, we developed an off-axis short-wave infrared coded optical system (SICOS) based on curved prism dispersion, and we further explored the design and optimization of the SICOS structure. Finite element analyses of a space-based short-wave infrared coded spectrometer based on curved prism dispersion (SSICS-CPD), including static simulation, modal analysis, sinusoidal vibration mechanical analysis, and random vibration mechanical analysis, were carried out. Simulation results showed that the SICOS support structure had excellent mechanical and thermal stability. As off-axis optical systems cannot meet the requirements of optical position accuracy through centering processing, a point source microscope and three-coordinate measuring machines were employed to complete the high-precision and rapid assembly of the SSICS-CPD. In addition, verification tests of surface shape error, stress relief, random vibration, and optical design parameters were carried out to validate the high stability and imaging performance of the SSICS-CPD. Results showed that the average modulation transfer function in the full field was 0.43 at 16.67 lp/mm, the spectral smile was <0.2 pixels, and the spectral keystone was <0.1 pixels. The design, analysis, assembly, and verification of the SSICS-CPD provide a useful reference for the development of other spaceborne prism dispersion spectrometers.<br/></div> © 2022 Optica Publishing Group.
Number of references:33
Main heading:Spectrometers
Controlled terms:Optical systems - Vibration analysis - Dispersion (waves) - Pixels - Modal analysis - Infrared radiation - Optical design - Stress relief - Prisms
Uncontrolled terms:Curved prisms - Design Analysis - Design verification - Dispersion spectrometers - Mechanical analysis - Off-axis - Random vibrations - Short wave infrared - Space-based - Space-borne
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics
DOI:10.1364/AO.449320
Funding details: Number: 2019JQ-929, Acronym: -, Sponsor: -;Number: 41706207,42176182, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Science Basic Research Foundation of Shaanxi Province (2019JQ-929); National Natural Science Foundation of China (41706207, 42176182).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 315>
Accession number:20212310464071
Title:Semisupervised Spectral Degradation Constrained Network for Spectral Super-Resolution
Authors:Chen, Wenjing (1); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Recently, various deep learning-based methods have been designed to improve the spectral resolution of the multispectral image (MSI) to obtain the hyperspectral image (HSI). These methods usually rely on sufficient MSI/HSI pairs for supervised training. However, collecting plentiful HSIs is time-consuming. In this letter, a semisupervised spectral degradation constrained network (SSDCN) is proposed to improve the spectral resolution of MSI. SSDCN is an autoencoder-like network that is composed of an encoder subnetwork for estimating HSI from input MSI and a decoder subnetwork for reconstructing MSI from the estimated HSI. A semisupervised training method is proposed to explore both MSI/HSI pairs and MSIs without ground-truth HSIs to optimize SSDCN. Simulated and two real databases are employed to demonstrate the effectiveness of SSDCN.<br/></div> © 2004-2012 IEEE.
Number of references:21
Main heading:Image enhancement
Controlled terms:Deep learning - Spectral resolution - Spectroscopy
Uncontrolled terms:Auto encoders - Learning-based methods - Multispectral images - Real database - Semi-supervised - Semi-supervised trainings - Super resolution - Supervised trainings
Classification code:461.4 Ergonomics and Human Factors Engineering - 741.1 Light/Optics
DOI:10.1109/LGRS.2021.3079961
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 316>
Accession number:20231914078169
Title:Chinese Character Font Classification in Calligraphy and Painting Works Based on Decision Fusion
Authors:Zeng, Zimu (1, 2); Zhang, Pengchang (1); Wang, Jia (3); Tang, Xingjia (1); Liu, Xuebin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Cas, Xi'an, China; (2) University of Chinese Academy of Sciences, China; (3) Shaanxi History Museum, Xi'an, China
Corresponding author:Zhang, Pengchang(zhangpengchang@opt.ac.cn)
Source title:Proceedings - 2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Abbreviated source title:Proc. - IEEE/WIC/ACM Int. Jt. Conf. Web Intell. Intell. Agent Technol., WI-IAT
Part number:1 of 1
Issue title:Proceedings - 2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Issue date:2022
Publication year:2022
Pages:738-744
Language:English
ISBN-13:9781665494021
Document type:Conference article (CA)
Conference name:2022 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology, WI-IAT 2022
Conference date:November 17, 2022 - November 20, 2022
Conference location:Virtual, Online, Canada
Conference code:188190
Sponsor:Association for Computing Machinery (ACM); IEEE Computer Society Technical Committee on Intelligent Informatics (TCII); IOS Press; Web Intelligence Consortium (WIC); Wilfrid Laurier University; York University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Font recognition is an important part in the field of painting and calligraphy style recognition. Traditional font classification methods are mainly based on texture feature extraction and other methods, which need to be improved in classification accuracy. The mainstream classification methods mainly use convolutional neural networks, but such methods have poor interpretability and may face the problem that some detailed features cannot be accurately extracted. Based on convolutional neural network, the gray-level images, Local Binary Pattern (LBP) feature and Histogram of Oriented Gradient (HOG) of the images in the font dataset are respectively trained. Finally, the results of the three networks are fused by means of average decision fusion. The experimental results of font recognition show that the proposed method can extract the detailed features of fonts more accurately and obtain higher classification accuracy.<br/></div> © 2022 IEEE.
Number of references:24
Main heading:Local binary pattern
Controlled terms:Classification (of information) - Convolution - Convolutional neural networks - Graphic methods - Textures
Uncontrolled terms:Chinese characters - Classification accuracy - Classification methods - Convolutional neural network - Convolutional neural network local binary pattern - Decisions fusion - Font classification - Font recognition - Histogram of oriented gradients - Local binary patterns
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis
DOI:10.1109/WI-IAT55865.2022.00117
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 317>
Accession number:20221611982458
Title:A wideband self-decoupled multi-input multi-output antenna with a high isolation
Authors:Lu, Hao (1); Zhang, Li (1); Cao, Zhi-Xun (1); Sun, Ji-Qiu (1); Weng, Zibin (1); Wang, Hao (2)
Author affiliation:(1) National Key Laboratory of Antennas and Microwave Technology, Xidian University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China
Corresponding author:Zhang, Li(lizhang@mail.xidian.edu.cn)
Source title:International Journal of RF and Microwave Computer-Aided Engineering
Abbreviated source title:Int J RF Microwave Comput Aided Eng
Volume:32
Issue:7
Issue date:July 2022
Publication year:2022
Article number:e23190
Language:English
ISSN:10964290
E-ISSN:1099047X
CODEN:IJMEFQ
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">A wideband MIMO antenna, which consists of two adjacent antenna elements with a very close distance (2 mm or 0.026λ), is suggested to achieve a good isolation by the principle of common mode (CM, in-phase signals) and differential mode (DM, out-of-phase signals) cancelation without using any additional decoupling structure in this article. Compared with its reference design, the measured results demonstrate that the isolation of proposed design can be improved to better than 20 dB in a wider bandwidth of 3.2–5.9 GHz (59%), with S<inf>11</inf> and S<inf>22</inf> < −10 dB. The experimental efficiency and envelope correlation coefficients are larger than 78% and <0.04 for the proposed design, respectively. The proposed multiple-input multiple-output (MIMO) antenna array, with good isolation and diversity performance, exhibits broad application prospects in the tightly arranged MIMO antennas of 5G mobile devices.<br/></div> © 2022 Wiley Periodicals LLC.
Number of references:29
Main heading:Antenna arrays
Controlled terms:5G mobile communication systems - Microwave antennas - MIMO systems - Mobile antennas
Uncontrolled terms:Antenna element - Decouplings - High isolation - Mode cancelation - Multi-input multi-output - Multiple input multiple output antennas - Phase signals - Self-decoupled - Wide-band - Wideband decoupling
Classification code:716.3 Radio Systems and Equipment
Numerical data indexing:Decibel 1.00E+01dB, Decibel 2.00E+01dB, Frequency 3.20E+09Hz to 5.90E+09Hz, Percentage 5.90E+01%, Percentage 7.80E+01%, Size 2.00E-03m
DOI:10.1002/mmce.23190
Funding details: Number: 2020YFA0713900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Key Research and Development Program of China, Grant/Award Number: 2020YFA0713900 Funding information
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 318>
Accession number:20231113708384
Title:Study on the Influence of Deposition Temperature on the Properties of Lanthanum Titanate Films
Authors:Li, Yang (1); Xu, Junqi (1); Su, Junhong (1); Liu, Zheng (2)
Author affiliation:(1) Shaanxi Province Thin Films Technology and Optical Test Open Key Laboratory, Xi'an Technological University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Machinery, Joint Laboratory of Advanced Optical Manufacturing Technology, Chinese Academy of Sciences, Xi'an, China
Corresponding authors:Li, Yang(liyang01@st.xatu.edu.cn); Xu, Junqi(jqxu2210@163.com)
Source title:OGC 2022 - 7th Optoelectronics Global Conference
Abbreviated source title:OGC - Optoelectron. Glob. Conf.
Part number:1 of 1
Issue title:OGC 2022 - 7th Optoelectronics Global Conference
Issue date:2022
Publication year:2022
Pages:10-14
Language:English
ISBN-13:9781665486989
Document type:Conference article (CA)
Conference name:7th Optoelectronics Global Conference, OGC 2022
Conference date:December 6, 2022 - December 11, 2022
Conference location:Virtual, Online, China
Conference code:186916
Sponsor:IEEE Photonics Society Guangdong Chapter
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The work aims to study the effect of deposition temperature on optical properties and residual stresses in Lanthanum titanate (H4) films. The LaTiO3 films were deposited by electron-beam thermal evaporation technique. The residual stress of LaTiO3 films on fused silica was characterized macroscopically and microscopically, using laser interferometry and AFM. The residual stresses and surface profile shape change were simulated using finite element analysis methods. It was confirmed that the deposition temperature did not affect the optical properties of the films but did for residual stresses. The residual stress of LaTiO3 films changes from decreasing tensile stress to compressive stress as the deposition temperature increases. The deposition temperature is used to modulate the magnitude and transition of the residual stress in the films. There is a strong dependence between the residual stresses and the densities of surface columnar structures in LaTiO3 films. The effect of density of surface columnar structures is found as follows: the film with the lower density of surface columnar structures generally shows a tensile and high density easily transform into compress stress. This conclusion is also verified by the increase of the corresponding refractive index. The simulated surface profiles are basically overlapping with the measured data. The proposed model is validated for the simulation of residual stresses in monolayers.<br/></div> © 2022 IEEE.
Number of references:21
Main heading:Finite element method
Controlled terms:Compressive stress - Deposition - Fused silica - Lanthanum compounds - Laser interferometry - Morphology - Refractive index - Residual stresses - Surface morphology - Surface stress - Thermal evaporation - Titanium compounds
Uncontrolled terms:Columnar structures - Component - Deposition temperatures - Electron-beam - Finite element analyse - Lanthanum titanate - Lanthanum titanate film - Property - Surface profiles - Titanate films
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 743.2 Holographic Applications - 744.9 Laser Applications - 802.3 Chemical Operations - 812.3 Glass - 921.6 Numerical Methods - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements - 951 Materials Science
DOI:10.1109/OGC55558.2022.10050984
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 319>
Accession number:20224513074607
Title:High Dynamic Range Image Fusion Algorithm Based on Local Weighted Superposition
Title of translation:基于局域加权叠加的高动态范围图像融合算法
Authors:Guo, Lulu (1, 2); Yi, Hongwei (1)
Author affiliation:(1) Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yi, Hongwei(Yihongwei@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1110001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Aiming at the limitation of the dynamic range of the imaging sensor， the size of the local window and the fusion image method is further studied， and the multi-exposure image fusion method based on the camera response curve is improved. By changing the exposure time， a set of images with different exposure degrees is obtained， and image fusion is performed on the high-brightness image and the low-brightness image. Firstly， the conversion factor is directly calculated based on the image pixel value， which simplifies the calculation of the pixel ratio factor curve of the High Exposure （HE） image and Low Exposure （LE） image， and avoids the solution of the camera response curve. The pixel values in the low-brightness image are mapped to the pixel value range of the high-brightness image through the ratio factor， and then the image is subjected to local windowing processing. There are three cases of overexposure and good overexposure. For different exposure situations， according to the saturation of the neighborhood pixels in the highlighted image window， different weight coefficients are determined for multi-exposure weighted fusion， which is roughly divided into three steps： 1） Select the unsaturated pixel value of the HE image and the corresponding pixel value in the LE image to linearly fit to obtain the pixel ratio factor curve. 2） After adding local windows to the HE image， determine the saturation of the pixel values in each window. Whether the center pixel value of the highlighted image is saturated and whether the neighborhood pixel values of the center value are all saturated， the exposure of the center pixel value is determined. The situations are divided into three categories， 1） Good exposure： the central pixel value is not saturated， and all the neighborhood pixel value sets are not saturated； 2） Incomplete overexposure： the central pixel value is not saturated， the neighborhood pixel value set is not completely saturated or the central pixel When the value is saturated， at least one of the neighboring pixel value sets is saturated； 3） Complete overexposure： the center pixel value is saturated， and the neighborhood pixel value set is also saturated. 3） According to the saturation situation， determine the weight coefficient of each pixel value fusion of the HE and the LE images. The weight coefficient is determined by the proportion of unsaturated pixel values in the neighborhood pixel value set in the HE image， and the final HDR image is obtained by weighted fusion. In terms of experimental verification， two typical multi-exposure fusion test sets of Bottle and Airport are selected to select the size of the local window and the imaging effect in a low signal-to-noise ratio environment. The wavelet transform fusion method and the window fusion method in this paper are compared horizontally. The experimental results show that：（1） With the increase of the selected window， the more pixels involved in the calculation， the influence of the over-bright central pixel value in the scene in the fusion process gradually decreases， the overall brightness decreases， and the quality of the fused image is more vulnerable. However， if the selection window is too small， the estimation accuracy of the saturated pixel value of the neighboring pixels will decrease. Therefore， in the selection of the window size， the influence of local noise on the quality of the fused image and the constraining ability of the neighboring pixels to the highlighted center pixel value should be considered at the same time. In order to achieve a better fusion effect， the algorithm in this paper selects the 5 × 5 window to fuse multiple images， improves the contrast of the image while maintaining the details of the image， and effectively restores the changes in the light and dark levels in the scene. （2） When the image signal-to-noise ratio is higher than 18 dB， the dark scene information in the LE image can still be effectively recovered after fusion， and the overall imaging effect of the fusion result can be guaranteed. There are two main reasons for the improvement of the anti-noise ability of the fused image： 1） The algorithm tries to use the pixel value in the highlighted image as much as possible， but the signal value of the highlighted image is generally too large， and the SNR of the pixel value after adding noise is still very large. 2） The pixel value of the low-brightness image used to replace the overexposed pixel value of the high-brightness image will also be larger， so the influence of noise on the pixel value will also be reduced. （3） Compared with other algorithms， the algorithm in this paper can not only keep the overall contrast accurate and the image undistorted but also restore the edge clarity， retain the dark information in the bright environment， and reduce the halo caused by the strong light source. At the same time， the fusion algorithm uses local windows to process pixel values. The calculations between each window are independent of each other， and it is not necessary to process pixel values with good exposure. Therefore， the unique values of independent operations between each window are expected to be realized on hardware platforms such as GPU. Thread parallel processing， with the potential to achieve HDR real-time fast imaging.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:27
Main heading:Image fusion
Controlled terms:Cameras - Image enhancement - Luminance - Pixels
Uncontrolled terms:Camera response - Camera response curve - High-dynamic range imaging - Image fusion overlay - Local weighted summation - Neighbourhood pixels - Pixel values - Response curves - Value sets - Weighted summations
Classification code:723.2 Data Processing and Image Processing - 742.2 Photographic Equipment
Numerical data indexing:Decibel 1.80E+01dB
DOI:10.3788/gzxb20225111.1110001
Funding details: Number: 2021YFC2202100, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China （No. 2021YFC2202100）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 320>
Accession number:20222712326239
Title:Adaptive feedback connection with a single-level feature for object detection (Open Access)
Authors:Ruan, Zhongling (1); Cao, Jianzhong (1); Wang, Hao (1); Guo, Huinan (1); Yang, Xin (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) China Aerospace Academy of Systems Science and Engineering, Beijing, China
Corresponding author:Ruan, Zhongling(ruanzhongling2015@opt.cn)
Source title:IET Computer Vision
Abbreviated source title:IET Comput. Vision
Volume:16
Issue:8
Issue date:December 2022
Publication year:2022
Pages:736-746
Language:English
ISSN:17519632
E-ISSN:17519640
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">From the perspective of detector optimisation, detecting objects using only a one-level feature cannot provide good performance for a wide range of scales. Various complex feature pyramidal structures address this problem using the divide-and-conquer strategy and multi-scale feature fusion. However, this requires adding too many additional convolutional layers and fusion operations. To address the issue, a simple detection part is proposed, which includes three components, namely a one-level feature map for detection, the encoder structure with feedback connection, and a decoupled head. The redesigned encoder and decoupled head can successfully address the performance decline caused by the one-level feature-based detection. Moreover, the proposed method can accelerate the convergence of the detector and achieve a faster inference time. Based on the optimised detection part, an adaptive feedback connection with a single-level feature (AFS) is proposed for object detection. The experiments conducted on the MS COCO 2017 benchmark show that the proposed method can achieve comparable results with its multi-scale pyramid counterpart, You Only Look Once v4 (YOLOv4). In addition, AFS can help the YOLOv4 achieve 44.9 mAP at 27 frame per second and converging 82 epochs earlier under the image size of 608×608, which represents a 42.1% improvements in the convergence speed.<br/></div> © 2022 The Authors. IET Computer Vision published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
Number of references:43
Main heading:Object detection
Controlled terms:Feature extraction - Image enhancement - Object recognition - Optimization - Signal encoding
Uncontrolled terms:Adaptive feedback - Detecting objects - Divide-and-conquer - Feedback connection - Multi-scale features - Objects detection - Optimisations - Performance - Pyramidal structures - Single level
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 921.5 Optimization Techniques
Numerical data indexing:Percentage 4.21E+01%
DOI:10.1049/cvi2.12121
Funding details: Number: -, Acronym: UCAS, Sponsor: University of Chinese Academy of Sciences;
Funding text:The authors would like to thank Pro. Cao and Dr. Wang for project supervision. This work is supported by the International Joint Training Program of the University of Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 321>
Accession number:20220811679038
Title:Remote Sensing Scene Classification by Local-Global Mutual Learning
Authors:Chen, Xiumei (1); Zheng, Xiangtao (1); Zhang, Yue (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences Shaanxi, Xi'an, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing scene classification (RSSC) attempts to label an image with a specific scene category. Recently, convolutional neural networks (CNNs) have shown the powerful feature extraction capability to combine local and global features. However, both the local and global features are extracted independently, which ignore the complementary representation. In this letter, a local-global mutual learning (LML) method is proposed to capture both the global and local features. Specifically, local regions are first generated by highlighting the semantic areas in the corresponding original image. Then, a two-branch architecture is used to extract features for the local regions and global image, respectively. Both the classification loss and mutual learning loss are exploited to train the local-global branches simultaneously, which constrain the two branches to promote each other. Experiments on two popular datasets demonstrate the effectiveness of the proposed method.<br/></div> © 2004-2012 IEEE.
Number of references:14
Main heading:Remote sensing
Controlled terms:Image processing - Neural networks - Semantics - Deep learning
Uncontrolled terms:Deep learning - Features extraction - Heating system - Local feature - Multi-branch network - Mutual learning - Remote sensing scene classification - Remote-sensing - Scene classification
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing
DOI:10.1109/LGRS.2022.3150801
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 322>
Accession number:20230313396223
Title:Research on optimization of alignment algorithm for off-axis telescopes wavefront active correction
Authors:Lei, Yu (1, 2); Ma, Caiwen (1, 2); Li, Hua (1); Kang, Shifa (1); Fu, Xing (1); Cao, Mingqiang (1); Yin, Yamei (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Lei, Yu(leiyu@opt.ac.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:61
Issue:11
Issue date:November 1, 2022
Publication year:2022
Report number:20221015G
Pages:115105
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the field of the active wavefront correction for off-axis telescopes, the sensitivity matrix and damped least squares method are widely employed to calculate the misalignment. Improper selection of the damping coefficient will lead to bad wavefront correction results. Moreover, the calculated misalignment is referenced on the optical coordinate system, which cannot be directly applied as the control quantity. The article has two innovative points to solve these problems. First, an adaptive damping least squares method is proposed. The method considers the mirror surface error, uses Python + Zemax cosimulation to perform closed-loop reverse verification, and selects the optimal damping coefficient. Simulation is carried out for verification. Second, the article deduces the mathematical relationship between the calculated misalignment and the mechanism control quantity. Based on the above research, the wavefront active correction experiment has been completed. The optical component is actively adjusted with the wavefront quickly converging to RMS = 0. 055λ @ 632. 8 nm. The results verify the correctness of the proposed method.<br/></div> © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:21
Main heading:Alignment
Controlled terms:Damping - Least squares approximations - Telescopes - Wavefronts
Uncontrolled terms:Active correction - Alignment algorithms - Coordinate transformations - Damped-least-squares method - Damping coefficients - Off-axis - Off-axis telescope - Optimisations - Sensitivity matrix - Wavefront correction
Classification code:601.1 Mechanical Devices - 921.6 Numerical Methods - 931.1 Mechanics
Numerical data indexing:Size 8.00E-09m
DOI:10.1117/1.OE.61.11.115105
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 323>
Accession number:20221611967882
Title:Electronic image stabilization algorithm for space exploration based on star point extraction
Authors:Yanliang, Li (1, 2); Yan, Wen (1); Dong, Wang (1); Wencan, Li (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Yan, Wen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12169
Part number:1 of 1
Issue title:Eighth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2022
Publication year:2022
Article number:121694B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653115
Document type:Conference article (CA)
Conference name:8th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:December 7, 2021 - December 9, 2021
Conference location:Kunming, China
Conference code:178220
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In deep space exploration, the optical system is susceptible to various factors in space, resulting in instability of the visual axis. In order to improve the imaging quality, high-precision optical axis pointing is required. This paper is designed to feed back the current optical axis pointing in real time during space exploration. Deviation algorithm. We use an improved threshold segmentation algorithm and secondary judgment to improve the accuracy of star point extraction, which can effectively extract star point pixels in real star images. Through the extracted star point pixels, we use a threshold-based gray square weighted centroid calculation method to calculate the centroid of the star point, and use the centroid deviation of the navigation star point to obtain the final optical axis pointing deviation. In addition, we also use the windowing method to speed up the calculation rate after obtaining the navigation star point. Experiments show that the algorithm can feedback the optical axis deviation of the optical system in real time.<br/></div> © 2022 SPIE
Number of references:5
Main heading:Stars
Controlled terms:Image enhancement - Image segmentation - Optical systems - Pixels - Extraction - Space research
Uncontrolled terms:Deep-space exploration - Electronic image stabilization - Imaging quality - Navigation stars - Optical axis - Point extraction - Real- time - Space explorations - Stabilization algorithms - Star point extraction
Classification code:656.2 Space Research - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.3 Optical Devices and Systems - 802.3 Chemical Operations
DOI:10.1117/12.2624047
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 324>
Accession number:20223312578305
Title:Mixed noise removal based on Stokes residual noise removal for division of focal plane polarimetric images
Authors:Jiang, Tuochi (1, 2); Wen, Desheng (1); Song, Zongxi (1); Gao, Wei (1); Liu, Gang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710071, China; (2) University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:Song, Zongxi(songxi@opt.ac.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:159
Issue date:December 2022
Publication year:2022
Article number:107220
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The division of focal plane (DoFP) polarimeter has the advantages of simultaneous imaging and compact optical structure. It is inevitable to introducing the noise in the process of micro-polarizer array integration, polarization image acquisition and transmission. In this paper, we propose a novel mixed noise suppression method based on Stokes residual noise removal (SRNR) for mixed additive white Gaussian noise (AWGN) and impulse noise (IN) removal in DoFP polarimetric images. The Laplacian scale mixture (LSM) model is introduced to estimate the IN and the nonlocal low-rank regularization (NLR) is adopted to enhance the denoising performance. The residual noise of the Stokes parameters is taken into consideration. This crucial processing achieves the acquisition of high-quality polarization data. The experiments demonstrate the superior denoising performance for polarimetric imagery in terms of objective assessment and visual evaluation.<br/></div> © 2022
Number of references:38
Main heading:Polarization
Controlled terms:Focusing - Gaussian distribution - Gaussian noise (electronic) - Impulse noise - Laplace transforms - Mixtures - Polarimeters - White noise
Uncontrolled terms:Division of focal plane polarization imaging - Focal Plane - Laplacian scale mixture - Laplacians - Mixed noise removals - Noises removal - Plane polarizations - Polarization imaging - Residual noise - Scale mixtures
Classification code:921.3 Mathematical Transformations - 922.1 Probability Theory - 922.2 Mathematical Statistics - 941.3 Optical Instruments
DOI:10.1016/j.optlaseng.2022.107220
Funding details: Number: 1,188,000,111, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: Y512171800, Acronym: -, Sponsor: National High-tech Research and Development Program;
Funding text:This research was supported by the National High-tech Research and Development Program (Y512171800) of China; Youth Innovation Promotion Association of the Chinese Academy of Sciences (1,188,000,111).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 325>
Accession number:20224513060941
Title:ReIMOT: Rethinking and Improving Multi-object Tracking Based on JDE Approach
Authors:Hou, Haoxiong (1, 2); Zhang, Ximing (3); Sun, Zhonghan (3); Gao, Wei (3)
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Chinese Academy of Sciences, Space Optical Research Lab, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China
Corresponding author:Gao, Wei(gaowei@opt.ac.cn)
Source title:2022 5th International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2022
Abbreviated source title:Int. Conf. Pattern Recognit. Artif. Intell., PRAI
Part number:1 of 1
Issue title:2022 5th International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2022
Issue date:2022
Publication year:2022
Pages:498-502
Language:English
ISBN-13:9781665499163
Document type:Conference article (CA)
Conference name:5th International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2022
Conference date:August 19, 2022 - August 21, 2022
Conference location:Chengdu, China
Conference code:183391
Sponsor:Chengdu University of Technology
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The multi-object tracking (MOT) algorithms of the joint detection and embedding (JDE) approach estimate bounding boxes and re-identification (re-ID) features of objects with the single network, which balance the tracking accuracy and inference speed. However, when the appearance information between different objects is highly similar, these algorithms are usually easy to cause identity switches, and the comprehensive tracking performance is poor in crowded scenes. Aiming at the above problems, we propose a stronger multi-object tracking algorithm termed as ReIMOT, based on FairMOT. A joint loss function of combining normalized Softmax Loss and the center distance penalty term is designed to supervise the re-ID branch, which increases the intra-class similarity and makes the extracted appearance features more discriminative. To further improve the tracking performance, we introduce coordinate attention to make the encoder-decoder network focus more on features of interest. The experimental results show that the proposed ReIMOT is more effective than the other advanced multi-object tracking algorithms, and decreases the number of ID switches by 13.8% compared to FairMOT on the MOT17 dataset.<br/></div> © 2022 IEEE.
Number of references:17
Main heading:Embeddings
Controlled terms:Computer vision - Inference engines - Object detection - Tracking (position)
Uncontrolled terms:Coordinate attention - Embeddings - Joint detection and embedding - Joint loss function - Joint-detection - Loss functions - Multi-object tracking - Object tracking algorithm - Re identifications - Tracking performance
Classification code:723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.4.1 Expert Systems - 723.5 Computer Applications - 741.2 Vision
Numerical data indexing:Percentage 1.38E+01%
DOI:10.1109/PRAI55851.2022.9904121
Funding details: Number: 61906186, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:* Corresponding author. This work is supported by National Natural Science Foundation (NNSF) of China under Grant 61906186.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 326>
Accession number:20225313323499
Title:An Integrated Solution of UAV Push-Broom Hyperspectral System Based on Geometric Correction with MSI and Radiation Correction Considering Outdoor Illumination Variation (Open Access)
Authors:Song, Liyao (1); Li, Haiwei (2); Chen, Tieqiao (2); Chen, Junyu (2); Liu, Song (2); Fan, Jiancun (1); Wang, Quan (2)
Author affiliation:(1) School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Li, Haiwei(lihaiwei@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:24
Issue date:December 2022
Publication year:2022
Article number:6267
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The unmanned aerial vehicle (UAV)-borne hyperspectral imaging system has the advantages of high spatial resolution, flexible operation, under-cloud flying, and easy cooperation with ground synchronous tests. Because this platform often flies under clouds, variations in solar illumination lead to irradiance inconsistency between different rows of hyperspectral images (HSIs). This inconsistency causes errors in radiation correction. In addition, due to the accuracy limitations of the GPS/inertial measurement unit (IMU) and irregular changes in flight platform speed and attitude, HSIs have deformation and drift, which is harmful to the geometric correction and stitching accuracy between flight strips. Consequently, radiation and geometric error limit further applications of large-scale hyperspectral data. To address the above problems, we proposed an integrated solution to acquire and correct UAV-borne hyperspectral images that consist of illumination data acquisition, radiance and geometric correction, HSI, multispectral image (MSI) registration, and multi-strip stitching. We presented an improved three-parameter empirical model based on the illumination correction factor, and it showed that the accuracy of radiation correction considering illumination variation improved, especially in some low signal-to-noise ratio (SNR) bands. In addition, the error of large-scale HSI stitching was controlled within one pixel.<br/></div> © 2022 by the authors.
Number of references:33
DOI:10.3390/rs14246267
Funding details: Number: 42101380, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2016YFB0500304,2016YFD0300603, Acronym: CSC, Sponsor: China Scholarship Council;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2022YFF1300201, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Natural Science Foundation of China (No.42101380), Natural Science Foundation of Shaanxi Province (No.2021JQ-324), National Key Research and Development Program of China (2022YFF1300201). We thank the support of China Scholarship Council. Program of China (2016YFB0500304 and 2016YFD0300603).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 327>
Accession number:20221611975638
Title:Spatial weighted kernel spectral angle constraint method for hyperspectral change detection
Authors:Liu, Song (1, 2); Song, Liyao (3); Li, Haiwei (1); Chen, Junyu (1, 2); Zhang, Geng (1); Hu, Bingliang (1); Wang, Shuang (1); Li, Siyuan (1)
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Jiaotong University, School of Information and Communications Engineering, Xi'an, China
Corresponding authors:Li, Haiwei(lihaiwei@opt.ac.cn); Zhang, Geng(gzhang@opt.ac.cn); Hu, Bingliang(hbl@opt.ac.cn)
Source title:Journal of Applied Remote Sensing
Abbreviated source title:J. Appl. Remote Sens.
Volume:16
Issue:1
Issue date:January 1, 2022
Publication year:2022
Article number:016503
Language:English
E-ISSN:19313195
CODEN:JARSC4
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Change detection is an important research direction in the field of remote sensing technology. However, for hyperspectral images, the nonlinear relationship between the two temporal images will increase the difficulty of judging whether the pixel is changed or not. To solve this problem, a hyperspectral change detection method is proposed in which the transformation matrices are obtained by using the constraint formula based on the minimum spectral angle, which uses both spectral and spatial information. Further, a kernel function is used to handle the nonlinear points. There are three main steps in the proposed method: First, the two temporal hyperspectral images are transformed into new dimensional space by a nonlinear function; second, in the dimension of observation, all the observations are combined into a vector, and then the two transformation matrices are obtained by using the formula of spectral angle constraint; and third, each pixel is given weight with a spatial weight map, which combined the spectral information and spatial information. Study results on three data sets indicate that the proposed method performs better than most unsupervised methods.<br/></div> © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:26
Main heading:Spectroscopy
Controlled terms:Linear transformations - Matrix algebra - Pixels - Remote sensing - Vector spaces
Uncontrolled terms:Angle constraint - Change detection - Constraints method - HyperSpectral - Kernel - Remote sensing technology - Spatial informations - Spectral angles - Spectral information - Transformation matrix
Classification code:921 Mathematics - 921.1 Algebra - 921.3 Mathematical Transformations
DOI:10.1117/1.JRS.16.016503
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 328>
Accession number:20223712740884
Title:NTIRE 2022 Spectral Recovery Challenge and Data Set (Open Access)
Authors:Arad, Boaz (1, 2); Timofte, Radu (3); Yahel, Rony (1, 4, 5); Morag, Nimrod (1, 2, 6); Bernat, Amir (1, 2); Cai, Yuanhao (7); Lin, Jing (7); Lin, Zudi (8); Wang, Haoqian (7); Zhang, Yulun (9); Pfister, Hanspeter (7); Van Gool, Luc (8); Liu, Shuai (10); Li, Yongqiang (10); Feng, Chaoyu (10); Lei, Lei (10); Li, Jiaojiao (11); Du, Songcheng (11); Wu, Chaoxiong (11); Leng, Yihong (11); Song, Rui (11); Zhang, Mingwei (12); Song, Chongxing (13); Zhao, Shuyi (13); Lang, Zhiqiang (13); Wei, Wei (13); Zhang, Lei (13); Dian, Renwei (14); Shan, Tianci (14); Guo, Anjing (14); Feng, Chengguo (14); Liu, Jinyang (14); Agarla, Mirko (14); Bianco, Simone (15); Buzzelli, Marco (15); Celona, Luigi (15); Schettini, Raimondo (15); He, Jiang (16); Xiao, Yi (16); Xiao, Jiajun (16); Yuan, Qiangqiang (16); Li, Jie (16); Zhang, Liangpei (17); Kwon, Taesung (18); Ryu, Dohoon (18); Bae, Hyokyoung (18); Yang, Hao-Hsiang (19); Chang, Hua-En (19); Huang, Zhi-Kai (19); Chen, Wei-Ting (22); Kuo, Sy-Yen (21); Chen, Junyu (20); Li, Haiwei (20); Liu, Song (20); Sabarinathan, Sabarinathan (23); Uma, K. (24); Bama, B Sathya (24); Roomi, S. Mohamed Mansoor (24)
Author affiliation:(1) Oddity Tech Ltd.; (2) Voyage81 Ltd.; (3) Computation Vision Lab, Eth Zurich, Switzerland; (4) Center for Artificial Intelligence and Data Science, University of Wurzburg, Germany; (5) The Academic College of Tel Aviv Yaffo, Israel; (6) Tel Aviv University, Israel; (7) Shenzhen International Graduate School, Tsinghua University, China; (8) Visual Computing Group, Harvard University, United States; (9) Computation Vision Lab, Eth Zurich, Switzerland; (10) Center for Artificial Intelligence and Data Science, Jmu Wurzburg, Germany; (11) Xiaomi Inc., China; (12) Xidian University, Xian, China; (13) Northwestern Polytechnical University, Xi'an, China; (14) Chang an Campus of Northwestern Polytechnical University, China; (15) Hunan University, China; (16) Department of Informatics Systems and Communication, University of Milano - Bicocca, Italy; (17) School of Geodesy and Geomatics, Wuhan University, China; (18) State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, China; (19) Department of Bio and Brain Engineering, Kaist, Korea, Republic of; (20) Department of Electrical Engineering, National Taiwan University, Taiwan; (21) Graduate Institute of Electronics Engineering, National Taiwan University, Taiwan; (22) Xi an Institute of Optics and Precision Mechanics of Cas, Xi'an, China; (23) Couger Inc, Japan; (24) Thiagarajar College of Engineering, India
Source title:IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops
Abbreviated source title:IEEE Comput. Soc. Conf. Comput. Vis. Pattern Recogn. Workshops
Volume:2022-June
Part number:1 of 1
Issue title:Proceedings - 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2022
Issue date:2022
Publication year:2022
Pages:862-880
Language:English
ISSN:21607508
E-ISSN:21607516
ISBN-13:9781665487399
Document type:Conference article (CA)
Conference name:2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2022
Conference date:June 19, 2022 - June 20, 2022
Conference location:New Orleans, LA, United states
Conference code:182247
Publisher:IEEE Computer Society
Abstract:<div data-language="eng" data-ev-field="abstract">This paper reviews the third biennial challenge on spectral reconstruction from RGB images, i.e., the recovery of whole-scene hyperspectral (HS) information from a 3-channel RGB image. This challenge presents the "ARAD_1K"data set: a new, larger-than-ever natural hyperspectral image data set containing 1,000 images. Challenge participants were required to recover hyper-spectral information from synthetically generated JPEG-compressed RGB images simulating capture by a known calibrated camera, operating under partially known parameters, in a setting which includes acquisition noise. The challenge was attended by 241 teams, with 60 teams com-peting in the final testing phase, 12 of which provided de-tailed descriptions of their methodology which are included in this report. The performance of these submissions is re-viewed and provided here as a gauge for the current state-of-the-art in spectral reconstruction from natural RGB images.<br/></div> © 2022 IEEE.
Number of references:55
Main heading:Recovery
Controlled terms:Computer vision - Image reconstruction - Spectroscopy
Uncontrolled terms:Calibrated cameras - Data set - HyperSpectral - Hyperspectral image datas - Hyperspectral information - Image datasets - RGB images - Spectral information - Spectral reconstruction - Spectral recoveries
Classification code:723.5 Computer Applications - 741.2 Vision
Numerical data indexing:Temperature 1.00E00K
DOI:10.1109/CVPRW56347.2022.00102
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 329>
Accession number:20221712027113
Title:Pupil Dilation Reflecting the Characteristics of Attention Networks of Patients Using Image Processing
Authors:Zhang, Huangyemin (1, 2, 3); Wen, Shirui (4); Zhu, Guangpu (1, 2, 3); Huang, Kailing (4); Hu, Bingliang (1, 3); Wang, Quan (1, 3); Feng, Li (4)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Xiangya Hospital, Central South University, Department of Neurology, Changsha, China
Corresponding authors:Wang, Quan(wangquan@opt.ac.cn); Feng, Li(fenglihx@163.com)
Source title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Abbreviated source title:IEEE Int. Conf. Electr. Eng., Big Data Algorithms, EEBDA
Part number:1 of 1
Issue title:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Issue date:2022
Publication year:2022
Pages:1086-1092
Language:English
ISBN-13:9781665416061
Document type:Conference article (CA)
Conference name:2022 IEEE International Conference on Electrical Engineering, Big Data and Algorithms, EEBDA 2022
Conference date:February 25, 2022 - February 27, 2022
Conference location:Changchun, China
Conference code:178616
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Attention is the basis of high-level cognitive functions of the human brain. The attention network consists of three networks: alerting, orienting, and executive network. Different type of epilepsy affects different brain regions, which could influence attention function differently. We created a computer-based automatic attention function evaluation platform with eye-tracking, which was adapted from the attention network test (ANT). Through this platform, we compared the pupil activation patterns of epilepsy patients (29 patients with frontal lobe epilepsy and 37 patients with temporal lobe epilepsy) and healthy controls (n = 29) in three networks. Participants had different patterns of pupil dilation under the three network conditions. Eye-tracking data showed that compared with the healthy control group, patients with frontal lobe epilepsy had a worse executive function, and temporal lobe epilepsy affected the patients' alerting and orienting network. Our study showed that the characteristic analysis of pupil activation curves of three networks could assist in the location of epileptogenic lesions in patients with epilepsy.<br/></div> © 2022 IEEE.
Number of references:28
Main heading:Eye tracking
Controlled terms:Brain - Image processing - Activation analysis - Neurology
Uncontrolled terms:Attention functions - Attention network - Attention network test - Frontal lobe epilepsy - Frontal lobes - Network test - Pupil dilation - Pupillometry - Temporal lobe epilepsy - Three networks
Classification code:461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 723.2 Data Processing and Image Processing
DOI:10.1109/EEBDA53927.2022.9744922
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:ACKNOWLEDGMENT This study was supported by the Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key laboratory of Biomedical Spectroscopy of Xi'an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 330>
Accession number:20221511941424
Title:Symmetric thinned coprime array with reduced mutual coupling for mixed near-field and far-field sources localization (Open Access)
Authors:Wang, Yinsheng (1); Cui, WeiJia (1); Yang, Bingqing (2); Ba, Bin (1); Mei, Fengtong (1)
Author affiliation:(1) National Digital Switching System Engineering & Technological Research Center, Henan, Zhengzhou, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an, China
Corresponding author:Wang, Yinsheng(yinshengw@163.com)
Source title:IET Radar, Sonar and Navigation
Abbreviated source title:IET Radar Sonar Navig.
Volume:16
Issue:8
Issue date:August 2022
Publication year:2022
Pages:1292-1303
Language:English
ISSN:17518784
E-ISSN:17518792
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">As we all know, the non-uniform array is widely used in the mixed near-field (NF) and far-field sources localization. The nested array contains a uniform linear array, it is easy to be affected by mutual coupling, so we propose a symmetric thinned coprime array (STCA) to reduce the mutual coupling effect of mixed source localization. In this paper, the STCA configuration consists of two sparse uniform linear arrays, the first subarray is composed of 2N − 1 sensors, and the sensor element spacing is Md. The second subarray is composed of (Formula presented.) sensors, and the sensor element spacing are Nd and Md respectively. The two subarrays form the symmetric coprime array, which shares a reference sensor. Under the same number of physical array sensors, compared with the latest symmetric nested array, although STCA has lower consecutive lags, the array sensors have larger inter-sensor spacing and larger physical array aperture, which can significantly reduce the mutual coupling effect between physical sensors, and better estimation performance of direction-of-arrival (DOA) estimation can be achieved. Finally, simulation results show that STCA can achieve better performance than other symmetric nested arrays under the same array sensors and mutual coupling effects.<br/></div> © 2022 The Authors. IET Radar, Sonar & Navigation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
Number of references:43
Uncontrolled terms:Coprime - Far-field - Mutual coupling - Mutual coupling effects - Near fields - Nested arrays - Source localization - Subarray - Symmetric thinned coprime array - Symmetrics
Classification code:716.2 Radar Systems and Equipment
Numerical data indexing:Force 2.00E+00N
DOI:10.1049/rsn2.12261
Funding details: Number: 62171468, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The work was supported by the National Natural Science Foundation of China (grant no. 62171468).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 331>
Accession number:20222012107755
Title:Path optimization for uniform removal pre-polishing of optical glass with industrial robots (Open Access)
Authors:Zhao, Liangxiao (1, 2); Zhang, Jian (1, 3); Gao, Limin (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xidian University, School of Mechano-Electronic Engineering, Xi'an, China
Corresponding author:Zhang, Jian(zj@opt.ac.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:61
Issue:4
Issue date:April 1, 2022
Publication year:2022
Article number:045104
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the field of precision optical manufacturing, the manufacturing method using industrial robots as the carrier has highlighted its advantages of being more economical and efficient than existing methods. The application of different end-effectors has expanded the scenarios and processing limits of optical polishing. However, concise and simplified polishing technologies remain challenging. To improve the versatility of industrial robots in different processes and reduce the number of polishing iterations, pre-polishing with uniform removal is introduced and optimized, providing an excellent basic surface for polishing and finishing. Combined with the performance of an industrial robot, we adopt a swing composite path, to which the motion parameters are adjusted and optimized to minimize the fluctuation of the overall overlap rate (within 5%). The optimal path is based on the uniform B-spline curve characterization, which improves the consistency of the dwelling time and reduces the complexity of pre-polishing, laying a theoretical foundation for efficient and high-quality optical manufacturing.<br/></div> © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Number of references:23
Main heading:Polishing
Controlled terms:Curve fitting - Industrial robots - Optical glass
Uncontrolled terms:Manufacturing methods - Optical manufacturing - Optical polishing - Overlap rate - Path optimizations - Polishing of optical glass - Polishing technology - Pre-polishing - Swing composite path - Uniform removal
Classification code:604.2 Machining Operations - 731.6 Robot Applications - 741.3 Optical Devices and Systems - 812.3 Glass - 921.6 Numerical Methods
Numerical data indexing:Percentage 5.00E+00%
DOI:10.1117/1.OE.61.4.045104
Funding details: Number: XAB2016A10, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:We would like to thank Editage and ZillionZestEdit for English language editing. The research was funded by the West Light Foundation of the Chinese Academy of Sciences (XAB2016A10) and Key Research and Development Projects of Shaanxi Province, China (2018ZDXM-GY-105). The authors declare no conflicts of interest.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
<RECORD 332>
Accession number:20223512639691
Title:Single Space Object Image Denoising and Super Resolution Reconstructing based on Unpaired images
Authors:Chen, Errui (1); Feng, Xubin (1, 2)
Author affiliation:(1) Photoelectric Tracking Space Precision Measurement Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Jt. Lab. for Ocean Observation and Detection(Xi'an Institute of Optics and Precision Mechanics), Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
Corresponding author:Feng, Xubin(fengxubin@opt.ac.cn)
Source title:IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)
Abbreviated source title:ITAIC - IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf.
Volume:2022-June
Part number:1 of 1
Issue title:IEEE 10th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2022
Issue date:2022
Publication year:2022
Pages:1572-1576
Language:English
ISSN:26932865
ISBN-13:9781665422079
Document type:Conference article (CA)
Conference name:10th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2022
Conference date:June 17, 2022 - June 19, 2022
Conference location:Chongqing, China
Conference code:181640
Sponsor:Chengdu Global Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section; IEEE Harbin Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">High quality space target image is of great significance for space attack and defense because space exploration missions are becoming more and more important. But high quality images of space object are difficult to obtain due to the large number of cosmic rays in the space environment, as well as the limitations of optical lenses, detectors and transmission links on satellites. Image denoising and super-resolution reconstruction are the most economical and effective methods to solve this problem. This paper presents an unpaired denoising and super-resolution reconstruction method for optical remote sensing images which could obtain the images has higher quality than dataset itself. In order to further improve the quality of optical remote sensing images, high quality natural images are added into the training set, and unpaired image data sets (natural images and optical remote sensing images belong to different fields and cannot correspond one to one) are adopted to complete the training of the whole network by using the idea of unsupervised learning. Through the verification tests of three optical remote sensing image data sets, it can be seen that the method in this paper has reconstructed high quality optical remote sensing images with higher resolution than the dataset itself.<br/></div> © 2022 IEEE.
Number of references:15
Main heading:Optical remote sensing
Controlled terms:Cosmology - Image enhancement - Image reconstruction - Lenses - Optical resolving power - Space optics - Space research - Statistical tests
Uncontrolled terms:Component - Dual cycle - Generative adversiral network - High quality - Optical remote sensing - Remote sensing images - Space object image - Space objects - Super-resolution reconstruction - Unpaired
Classification code:656.1 Space Flight - 656.2 Space Research - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics
DOI:10.1109/ITAIC54216.2022.9836590
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 333>
Accession number:20231513873914
Title:A Review of the Research on the Measurement Methods of the Sub-reflector of Large Aperture Radio Telescopes
Authors:Qiao, Jiang (1, 2); Lin, Shangmin (1, 2); Wang, Hu (1, 2); Jin, Yu (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Shanxi Province, Xi'an City, China; (2) University of Chinese Academy of Sciences, Beijing City; 100049, China
Corresponding author:Wang, Hu(wanghu@opt.ac.cn)
Source title:2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation, APCAP 2022 - Proceedings
Abbreviated source title:IEEE Asia-Pacific Conf. Antennas Propag., APCAP - Proc.
Part number:1 of 1
Issue title:2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation, APCAP 2022 - Proceedings
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665489546
Document type:Conference article (CA)
Conference name:10th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2022
Conference date:November 4, 2022 - November 7, 2022
Conference location:Xiamen, China
Conference code:187485
Sponsor:Foshan Lambda Technology Co.,Ltd; Rohde and Schwarz (China) Technology Co.,Ltd; Techwave Communications Inc.; TMY Technology Inc. (TMYTEK)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">As an important electromagnetic wave signal receiving and transmitting equipment, antenna reflector is widely used in radar, communication and astronomical observation and other fields. The positional accuracy of the sub-reflector of a large aperture radio telescope is a key indicator that affects the receiving performance. This paper briefly expounds the principles and characteristics of various position measurement methods, and summarizes the main advantages and limitations of various technical solutions, providing a reference for the exploration and innovation of position and attitude measurement methods for radio telescope sub-reflectors.<br/></div> © 2022 IEEE.
Number of references:12
Main heading:Radio telescopes
Controlled terms:Antennas - Reflection
Uncontrolled terms:Large aperture - Measurement methods - Position - Radar communication - Radar observations - Signal receiving - Signal transmitting - Sub-reflectors - Transmitting equipments - Wave signal
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 716.3 Radio Systems and Equipment
DOI:10.1109/APCAP56600.2022.10069990
Funding details: Number: 11803075, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding:This study is supported by National Key Research and Development Program of China [grant number 2021YFC2203501] and National Natural Science Foundation of China (NSFC) [grant number 11803075].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 334>
Accession number:20230413449649
Title:Design of subpixel response characterization measurements for the Earth 2.0 Mission
Authors:Li, Yan (1); Wang, Chaoyan (1); Zhang, Hui (1); Zhang, Yongshuai (1); Tang, Zhenghong (1); Ge, Jian (1); Zhang, Hongfei (2); Wang, Jian (2); Song, Zongxi (3); Gao, Wei (3)
Author affiliation:(1) Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, China; (2) Univ. of Science and Technology of China, Address, Hefei, China; (3) Xi'an Institute of Optics and Precision Mechanics, Address, Xi'an, China
Corresponding author:Li, Yan(liyan@shao.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:121804D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese space mission designed to detect thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth 2.0s), cold low-mass planets, and free-floating planets. Six 30cm telescopes are used for very high precision photometry measurements to detect transiting planets. In order to reach very high precision photometry, an intra-pixel response function (IPRF) of detectors needs to be measured for the ET design to keep image motions caused by spacecraft operation within an acceptable level. To characterize detectors, two setups have been developed in the lab to measure spot size of the characterization beam and subpixel sensitivity. Early characterization results are reported.<br/></div> © 2022 SPIE.
Number of references:7
Main heading:Earth (planet)
Controlled terms:CMOS integrated circuits - Integrated circuit design - Orbits - Photometry - Pixels
Uncontrolled terms:Characterization measurement - CMOS - Earth-like planets - Exo-planets - High-precision - Response - Solar type stars - Space missions - Spot scan - Sub-pixels
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 941.4 Optical Variables Measurements
Numerical data indexing:Size 3.00E-01m, Time 2.00E+00s
DOI:10.1117/12.2630626
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This project is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600 and the Center for Astronomical Mega-Science, Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 335>
Accession number:20222212170262
Title:Multi-Level Alignment Network for Cross-Domain Ship Detection (Open Access)
Authors:Xu, Chujie (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(zhengxiangtao@opt.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:10
Issue date:May-2 2022
Publication year:2022
Article number:2389
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Ship detection is an important research topic in the field of remote sensing. Compared with optical detection methods, Synthetic Aperture Radar (SAR) ship detection can penetrate clouds to detect hidden ships in all-day and all-weather. Currently, the state-of-the-art methods exploit convolutional neural networks to train ship detectors, which require a considerable labeled dataset. However, it is difficult to label the SAR images because of expensive labor and well-trained experts. To address the above limitations, this paper explores a cross-domain ship detection task, which adapts the detector from labeled optical images to unlabeled SAR images. There is a significant visual difference between SAR images and optical images. To achieve cross-domain detection, the multi-level alignment network, which includes image-level, convolution-level, and instance-level, is proposed to reduce the large domain shift. First, image-level alignment exploits generative adversarial networks to generate SAR images from the optical images. Then, the generated SAR images and the real SAR images are used to train the detector. To further minimize domain distribution shift, the detector integrates convolution-level alignment and instance-level alignment. Convolution-level alignment trains the domain classifier on each activation of the convolutional features, which minimizes the domain distance to learn domain-invariant features. Instance-level alignment reduces domain distribution shift on the features extracted from the region proposals. The entire multi-level alignment network is trained end-to-end and its effectiveness is proved on multiple cross-domain ship detection datasets.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland. otv.
Number of references:55
Main heading:Synthetic aperture radar
Controlled terms:Geometrical optics - Convolutional neural networks - Generative adversarial networks - Radar imaging - Ships - Tracking radar - Convolution - Optical remote sensing - Space-based radar
Uncontrolled terms:Convolutional neural network - Cross-domain - Domain adaptation - Domain distribution - Multilevels - Optical image - Remote-sensing - Research topics - Ship detection - Synthetic aperture radar images
Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 723.4 Artificial Intelligence - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.3390/rs14102389
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 2022JQ-693, Acronym: -, Sponsor: -;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:Funding: This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Shaanxi Natural Science Basic Research Program 2022JQ-693.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 336>
Accession number:20224613118982
Title:Research on Micro-vibration Suppression Algorithm Based on RBF Neural Network
Authors:Wang, Yuanyuan (1, 2); Wang, Chen (1); Han, Junfeng (1); Tian, Hua (1, 2)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Chen(wangchen@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12343
Part number:1 of 1
Issue title:2nd International Conference on Laser, Optics and Optoelectronic Technology, LOPET 2022
Issue date:2022
Publication year:2022
Article number:123432Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510657588
Document type:Conference article (CA)
Conference name:2nd International Conference on Laser, Optics and Optoelectronic Technology, LOPET 2022
Conference date:May 20, 2022 - May 22, 2022
Conference location:Qingdao, China
Conference code:183644
Sponsor:Academic Exchange Information Center (AEIC)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the inter-satellite laser communication, a reliable communication link requires the boresight tracking accuracy between the optical transceivers to be sub-micro radians, and the control error caused by the vibration of the satellite platform is the most important factor affecting the optical communication link. The vibration and the effect of the adopted suppression scheme largely determine the tracking accuracy of the PAT system. Therefore, the impact of reducing the vibration on the optical communication link is a prerequisite for establishing stable satellite optical communication links. This paper uses the active compensation of the satellite platform vibration as the research direction, and proposes a composite control micro-vibration suppression algorithm based on the RBF neural network. On the basis of traditional PID control, adaptive RBF neural network feedforward control and PID control combination constitute composite control, design and establishing satellite platform vibration suppression system, simulation verifies the performance of traditional PID control and RBF composite control algorithm, result indicates that the RBF composite control algorithm has increased by 80% compared to traditional PID control.<br/></div> © 2022 SPIE.
Number of references:15
Main heading:Three term control systems
Controlled terms:Adaptive control systems - Optical communication - Optical links - Radial basis function networks - Satellite links - Satellites - Simulation platform
Uncontrolled terms:Composite control - Microvibrations - Optical communication links - Platform vibrations - RBF Neural Network - Satellite platform vibration - Satellite platforms - Suppression algorithm - Tracking accuracy - Vibration suppression
Classification code:655.2 Satellites - 655.2.1 Communication Satellites - 717.1 Optical Communication Systems - 723.5 Computer Applications - 731.1 Control Systems
Numerical data indexing:Percentage 8.00E+01%
DOI:10.1117/12.2648243
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 337>
Accession number:20223712737101
Title:Two-dimensional single-lobe Si photonic optical phased array with minimal antennas using a non-uniform large spacing array design
Authors:Xue, Yulong (1, 2); Zhang, Qihao (1); Ren, Yangming (1, 2); Lei, Yufang (1, 2); Sun, Xiaochen (1, 2); Zhang, Lingxuan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:24
Issue date:August 20, 2022
Publication year:2022
Pages:7158-7162
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We report a two-dimensional Si photonic optical phased array (OPA) optimized for a large optical aperture with a minimal number of antennas while maintaining single-lobe far field. The OPA chip has an optical aperture of ∼200 µm by 150 µm comprising a 9 × 9 antenna array. The two-dimensional spacings between these antennas are much larger than the wavelength and are highly non-uniform optimized by the genetic deep learning algorithm. The phase of each antenna is independently tunable by a thermo-optical phase shifter. The experimental results validate the design and exhibit a 0.39<sup>◦</sup> × 0.41<sup>◦</sup> beamwidth within the 3 dB steering range of 14<sup>◦</sup> × 11<sup>◦</sup> limited by the numerical aperture of the far-field camera system. The method can be easily extended to a larger aperture for narrower beamwidth and wider steering range.<br/></div> © 2022 Optica Publishing Group.
Number of references:29
Main heading:Deep learning
Controlled terms:Antenna lobes - Antenna phased arrays
Uncontrolled terms:Array design - Beam widths - Far-field - Non-uniform - Optical aperture - Optical phased arrays - Si photonics - Thermo-optical - Tunables - Two-dimensional
Classification code:461.4 Ergonomics and Human Factors Engineering
Numerical data indexing:Decibel 3.00E+00dB
DOI:10.1364/AO.463542
Funding details: Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (12004421, 61635013, 61675231); China Postdoctoral Science Foundation (2020M673523); Natural Science Foundation of Shaanxi Province (2019JQ-447).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 338>
Accession number:20223812766902
Title:Quantitative atmospheric turbulence simulating method for laser field imaging
Authors:Cheng, Zhiyuan (1, 2); Li, Zhiguo (1, 2); Ji, Zhou (3); Xia, Aili (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, China; (2) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an, China; (3) Unversity of Chinese Academy of Sciences, Xi'an, China
Corresponding author:Cheng, Zhiyuan(lzg@opt.ac.cn)
Source title:2022 4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Abbreviated source title:Int. Conf. Intell. Control, Meas. Signal Process., ICMSP
Part number:1 of 1
Issue title:2022 4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Issue date:2022
Publication year:2022
Pages:238-242
Language:English
ISBN-13:9781665486583
Document type:Conference article (CA)
Conference name:4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Conference date:July 8, 2022 - July 10, 2022
Conference location:Hangzhou, China
Conference code:182290
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The image of space objects by optical field imaging telescope is inevitably affected by atmospheric turbulence. Because of the random variation of atmospheric turbulence, it is difficult to control and simulate atmospheric turbulence quantitatively. In order to quantitatively research and reveal the relationship between intensity of atmospheric turbulence and image quality of laser field imaging, a quantitative controlling and simulating experiment method of intensity of atmospheric turbulence is presented. On the one hand, the atmospheric scintillation effect is researched quantitatively by real-time control and adjustment of laser beam intensity; on the other hand, the atmospheric phase disturbance effect is studied quantitatively by real-time regulating of laser frequency difference. A quantitative numerical controlling and simulating platform for atmospheric turbulence was constructed. On this experimental platform, the effect of phase jitter and scintillation of atmospheric turbulence on image quality of laser field imaging is quantitatively studied. The results show that the image quality decreases seriously and the image contour cannot be identified, when the scintillation index of turbulent light intensity is greater than 0.08 and the laser beam frequency difference is greater than 50Hz. In order to improve the image quality, the effect of atmospheric turbulence should be suppressed in the subsequent image reconstruction algorithm, and imaging experiments should be carried out under weak turbulence conditions as far as possible.<br/></div> © 2022 IEEE.
Number of references:8
Main heading:Atmospheric turbulence
Controlled terms:Atmospheric thermodynamics - Image enhancement - Image quality - Image reconstruction - Jitter - Laser beams - Quality control - Real time control - Scintillation
Uncontrolled terms:Field imaging - Frequency differences - Imaging quality - Laser field imaging - Laser fields - Optical field - Quantitative simulating - Random variation - Simulating experiments - Space objects
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 731 Automatic Control Principles and Applications - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 913.3 Quality Assurance and Control
Numerical data indexing:Frequency 5.00E+01Hz
DOI:10.1109/ICMSP55950.2022.9858990
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:ACKNOWLEDGMENT The work was supported by the National Natural Science Foundation of China Grant No: 61875257 and the Natural Science Foundation of Shaanxi Province China Grant No: 2017JM6035. The research was also supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology Grant No: CXJJ-21S042.The author would like to thank Zhang Yu for technical support.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 339>
Accession number:20224112891799
Title:Using Hyperspectral Reconstruction for Multispectral Images Change Detection
Authors:Liu, Song (1, 2); Li, Haiwei (1); Zhang, Geng (1); Hu, Bingliang (1); Chen, Junyu (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology of Cas, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:2022 7th International Conference on Image, Vision and Computing, ICIVC 2022
Abbreviated source title:Int. Conf. Image, Vis. Comput., ICIVC
Part number:1 of 1
Issue title:2022 7th International Conference on Image, Vision and Computing, ICIVC 2022
Issue date:2022
Publication year:2022
Pages:183-188
Language:English
ISBN-13:9781665467346
Document type:Conference article (CA)
Conference name:7th International Conference on Image, Vision and Computing, ICIVC 2022
Conference date:July 26, 2022 - July 28, 2022
Conference location:Xi'an, China
Conference code:182902
Sponsor:IEEE; Xi�an University of Science and Technology
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, using multispectral remote sensing data to change detection has been a hot issue. However, the limited number of spectral segments cannot accurately classify ground objects, which will affect the performance of change detection. To overcome this problem, in this paper, we propose a multispectral image change detection method based on a hyperspectral reconstruction network. The original multispectral data is used to generate hyperspectral data with richer spectral information, and then the generated data is used for change detection. The whole network consists of a reconstruction network and a change detection network. Based on the input multispectral data, a small amount of hyperspectral data is used to assist the training. In addition, we design a weighted loss to balance the two subnetworks in the training stage. In the test stage, the network can automatically recover hyperspectral data from multispectral data for change detection. The experimental results on two data sets show that the hyperspectral reconstruction method can improve the accuracy of multispectral images.<br/></div> © 2022 IEEE.
Number of references:25
Main heading:Image reconstruction
Controlled terms:Change detection - Image enhancement - Remote sensing - Spectroscopy
Uncontrolled terms:Change detection - HyperSpectral - Hyperspectral Data - Hyperspectral image reconstruction - Image change detection - Images reconstruction - Multi-spectral data - Multispectral images - Multispectral remote sensing - Reconstruction networks
DOI:10.1109/ICIVC55077.2022.9886261
Funding details: Number: 42101380, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-324, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2018YFB0504900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:ACKNOWLEDGMENT This work was partly supported by the National Key R&D Program of China (2018YFB0504900), by the National Natural Science Foundation of China (No.42101380), and by the Natural Science Foundation of Shaanxi Province (youth) (2021JQ-324).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 340>
Accession number:20215111369025
Title:Cross-Attention Spectral-Spatial Network for Hyperspectral Image Classification
Authors:Yang, Kai (1, 2); Sun, Hao (1, 2); Zou, Chunbo (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Hyperspectral image (HSI) classification aims to identify categories of hyperspectral pixels. Recently, many convolutional neural networks (CNNs) have been designed to explore the spectrums and spatial information of HSI for classification. In recent CNN-based methods, 2-D or 3-D convolutions are inevitably utilized as basic operations to extract the spatial or spectral-spatial features. However, 2-D and 3-D convolutions are sensitive to the image rotation, which may result in that recent CNN-based methods are not robust to the HSI rotation. In this article, a cross-attention spectral-spatial network (CASSN) is proposed to alleviate the problem of HSI rotation. First, a cross-spectral attention component is proposed to exploit the local and global spectrums of the pixel to generate band weight for suppressing redundant bands. Second, a spectral feature extraction component is utilized to capture spectral features. Then, a cross-spatial attention component is proposed to generate spectral-spatial features from the HSI patch under the guidance of the pixel to be classified. Finally, the spectral-spatial feature is fed to a softmax classifier to obtain the category. The effectiveness of CASSN is demonstrated on three public databases.<br/></div> © 1980-2012 IEEE.
Number of references:63
Main heading:Pixels
Controlled terms:Neural networks - Classification (of information) - Convolution - Spectroscopy - Image classification
Uncontrolled terms:Convolutional neural network - Correlation - Features extraction - Hyperspectral image classification - Spatial attention - Spatial database - Spatial features - Spatial network - Spectral attention
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis
DOI:10.1109/TGRS.2021.3133582
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 341>
Accession number:20221511946917
Title:Research on Key Technology of Compound Axis Control of Periscope Optical Communication Terminal
Authors:Liu, Peng (1, 2, 3); Li, Zhiguo (1, 2, 3); Xie, Meilin (1, 2); Wang, Fan (1, 2); Liu, Bo (1, 2); Chang, Zhiyuan (1, 2); Caiwen, Ma (1, 2, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an, China; (3) University of Chinese Academy of Science, Beijing, China
Corresponding author:Caiwen, Ma(cwma@opt.ac.cn)
Source title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Abbreviated source title:IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC
Part number:1 of 1
Issue title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Issue date:2022
Publication year:2022
Pages:939-942
Language:English
ISBN-13:9781665431859
Document type:Conference article (CA)
Conference name:6th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Chongqing, China
Conference code:177924
Sponsor:Chengdu Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, the problems of bandwidth matching, miss distance calculation and control loop coupling in the composite axis control system of optical communication terminal are analyzed and deduced in detail. Firstly, the relation between coarse and fine tracking bandwidth ratio is described. Secondly, the theoretical formula of miss distance under image rotation is derived by means of coordinate system transformation. Finally, a cooperative control strategy is proposed to achieve high precision tracking of the system. The accuracy and effectiveness of the above methods are verified by system simulation and test platform, which lays a theoretical and technical foundation for the application of the composite axis control system of the latent optical communication terminal.<br/></div> © 2022 IEEE.
Number of references:6
Main heading:Control systems
Controlled terms:Bandwidth - Optical communication - Simulation platform
Uncontrolled terms:Axis control - Bandwidth matching - Composite axis control system - Compound-axis - Distance calculation - Distance control - Image rotation - Key technologies - Miss-distance - Optical communications terminals
Classification code:716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 723.5 Computer Applications - 731.1 Control Systems
DOI:10.1109/ITOEC53115.2022.9734658
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;
Funding text:ACKNOWLEDGMENT The project was supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology (No: CXJJ-21S042).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 342>
Accession number:20223212553301
Title:Fabrication and Spectroscopic Properties of Heavily Pr<sup>3+</sup> Doped Selenide Chalcogenide Glass and Fiber for Mid-infrared Fiber Laser
Title of translation:用于中红外光纤激光器的高Pr3+掺杂硒化物硫系玻璃和光纤制备及其光谱特性
Authors:Xu, Chen-Yu (1, 2); Cui, Jian (1, 2); Xu, Yan-Tao (1); Xiao, Xu-Sheng (1); Cui, Xiao-Xia (1); Guo, Hai-Tao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Guo, Hai-Tao(guoht_001@opt.ac.cn)
Source title:Faguang Xuebao/Chinese Journal of Luminescence
Abbreviated source title:Faguang Xuebao
Volume:43
Issue:6
Issue date:June 2022
Publication year:2022
Pages:851-861
Language:English
ISSN:10007032
CODEN:FAXUEW
Document type:Journal article (JA)
Publisher:Editorial Office of Chinese Optics
Abstract:<div data-language="eng" data-ev-field="abstract">In order to develop a high gain medium for fiber lasers operating at 3-5 μm waveband，0-0. 4%（in weight）Pr<sup>3+</sup> ions doped Ge<inf>12</inf>As<inf>20.8</inf>Ga<inf>4</inf>Se<inf>63.2</inf> selenide chalcogenide glasses were prepared and the 0. 2%（in weight）Pr<sup>3+</sup> ions doped one was successfully drawn into step-index double-cladding fiber with the lowest loss of 2. 95 dB/m@6. 58 μm by a multistage rod-in-tube method. The electron-probe measure microanalysis（EPMA），X-ray diffraction （XRD），differential scanning calorimeter（DSC），field emission transmission electron microscope（FE-TEM），trans⁃ mission and mid-infrared fluorescence spectra were carried out to analyze the dispersion of Pr3+ ions in glass，the im⁃ purity contents，thermal and optical changes caused by the Pr<sup>3+</sup> ions’introduction. By analyzing the absorption and emission measurements of the serial glasses with the Judd-Ofelt theory，the Judd-Ofelt strength parameters，transi⁃ tion probabilities，exited state lifetime，branching ratios，and emission cross-sections were also calculated. This sel⁃ enide chalcogenide glass has high Pr<sup>3+</sup> ions’solubility and emission characteristic，good thermal stability and fiber forming performance，indicating that it has potential to be used as mid-infrared laser working medium.<br/></div> © 2022 Chines Academy of Sciences. All rights reserved.
Number of references:31
Main heading:Fiber lasers
Controlled terms:Chalcogenides - Differential scanning calorimetry - Fluorescence - Gallium compounds - Germanium compounds - Glass - Infrared devices - Metal ions - Optical fibers - Rare earths - Selenium compounds - Tellurium compounds - Transmission electron microscopy
Uncontrolled terms:Chalcogenide fibers - Chalcogenide glass - High gain - Infrared fibers - Infrared fluorescences - Mid-infrared fluorescence - Midinfrared - Rare earth ions - Selenides - Spectroscopic property
Classification code:531.1 Metallurgy - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.4 Solid State Lasers - 804.2 Inorganic Compounds - 812.3 Glass - 944.6 Temperature Measurements
Numerical data indexing:Age 2.08E+10yr, Decibel 9.50E+01dB, Percentage 2.00E+00%, Percentage 4.00E+00%, Size 3.00E-06m to 5.00E-06m, Size 5.80E-05m
DOI:10.37188/CJL.20220088
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 343>
Accession number:20224913200597
Title:Medical Image Retrieval Based on Attention Triplet Hashing
Authors:Guo, Shangrui (1); Yang, Kai (2, 3); Zhang, Zhijun (4); Li, Xijie (5)
Author affiliation:(1) Guangdong Country Garden School, Shunde, China; (2) Wuhan University of Technology, China; (3) University of Technology, Sanya Science and Education Innovation Park of Wuhan, Sanya, China; (4) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China; (5) Wuhan University of Technology, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China
Source title:2022 11th International Conference on Power Science and Engineering, ICPSE 2022
Abbreviated source title:Int. Conf. Power Sci. Eng., ICPSE
Part number:1 of 1
Issue title:2022 11th International Conference on Power Science and Engineering, ICPSE 2022
Issue date:2022
Publication year:2022
Pages:112-118
Language:English
ISBN-13:9781665451291
Document type:Conference article (CA)
Conference name:11th International Conference on Power Science and Engineering, ICPSE 2022
Conference date:September 23, 2022 - September 25, 2022
Conference location:Eskisehir, Turkey
Conference code:184106
Sponsor:IEEE Turkey Section; North China Electric Power University; SCIence and Engineering Institute; Turkey Section PES Chapter
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the wide application of X-ray, Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) methods in clinical practice, massive information retrieval and utilization of medical images has become a hot topic. Although traditional methods have shown good results in many specific medical applications, there are still many problems in large-scale medical applications. Deep hash method has been proved to be the most efficient approximate nearest neighbor search technique for large-scale image retrieval. To this end, Attention Triplet Hashing (ATH) network is proposed in this paper, which can further improve retrieval performance and ranking performance of small samples by learning low-dimensional hash codes that retain classification, ROI, and small sample information. We add channel attention to this end-to-end framework to focus on ROI information. And we add label smoothing regularization to distinguish small sample images. Finally, the validity of my framework is tested on a case-based medical dataset.<br/></div> © 2022 IEEE.
Number of references:17
Main heading:Medical applications
Controlled terms:Classification (of information) - Computerized tomography - Hash functions - Image retrieval - Magnetic resonance imaging - Medical imaging - Medical problems - Nearest neighbor search
Uncontrolled terms:Attention mechanisms - Deep hashing method - Hashing method - Imaging method - Label smoothing - Large-scales - Medical image retrieval - Small samples - Triplet label; - X-ray computed tomography
Classification code:461.1 Biomedical Engineering - 701.2 Magnetism: Basic Concepts and Phenomena - 716.1 Information Theory and Signal Processing - 723.5 Computer Applications - 746 Imaging Techniques - 903.1 Information Sources and Analysis - 921.5 Optimization Techniques
DOI:10.1109/ICPSE56329.2022.9935433
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 344>
Accession number:20220211457121
Title:Pairwise Comparison Network for Remote-Sensing Scene Classification (Open Access)
Authors:Zhang, Yue (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote-sensing scene classification aims to assign a specific semantic label to a remote-sensing image. Recently, convolutional neural networks (CNNs) have greatly improved the performance of remote-sensing scene classification. However, some confused images may be easily recognized as the incorrect category, which generally degrade the performance. The differences between image pairs can be used to distinguish image categories. This letter proposed a pairwise comparison network (PCNet), which contains two main steps: pairwise selection and pairwise representation. The proposed network first selects similar image pairs and then represents the image pairs with pairwise representations. The self-representation is introduced to highlight the informative parts of each image itself, while the mutual representation is proposed to capture the subtle differences between image pairs. Comprehensive experimental results on two challenging datasets (AID, NWPU-RESISC45) demonstrate the effectiveness of the proposed network.<br/></div> © 2004-2012 IEEE.
Number of references:17
Main heading:Remote sensing
Controlled terms:Convolution - Semantics - Neural networks
Uncontrolled terms:Comparison networks - Convolutional neural network - Image pairs - Multi-branch method - Pair-wise comparison - Performance - Remote sensing scene classification - Remote-sensing - Scene classification - Specific semantics
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/LGRS.2021.3139695
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, and in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze, Green
<RECORD 345>
Accession number:20224613126037
Title:Thermal Management Technologies Used for High Heat Flux Automobiles and Aircraft: A Review (Open Access)
Authors:Lv, Yi-Gao (1); Zhang, Gao-Peng (2); Wang, Qiu-Wang (1); Chu, Wen-Xiao (1)
Author affiliation:(1) Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi’an Jiaotong University, Xi’an; 710049, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Corresponding author:Chu, Wen-Xiao(wxchu84@xjtu.edu.cn)
Source title:Energies
Abbreviated source title:Energies
Volume:15
Issue:21
Issue date:November 2022
Publication year:2022
Article number:8316
Language:English
E-ISSN:19961073
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, global automotive industries are going through a significant revolution from traditional internal combustion engine vehicles (ICEVs) to electric vehicles (EVs) for CO<inf>2</inf> emission reduction. Very similarly, the aviation industry is developing towards more electric aircraft (MEA) in response to the reduction in global CO<inf>2</inf> emission. To promote this technology revolution and performance advancement, plenty of electronic devices with high heat flux are implemented on board automobiles and aircraft. To cope with the thermal challenges of electronics, in addition to developing wide bandgap (WBG) semiconductors with satisfactory electric and thermal performance, providing proper thermal management solutions may be a much more cost-effective way at present. This paper provides an overview of the thermal management technologies for electronics used in automobiles and aircraft. Meanwhile, the active methods include forced air cooling, indirect contact cold plate cooling, direct contact baseplate cooling, jet impingement, spray cooling, and so on. The passive methods include the use of various heat pipes and PCMs. The features, thermal performance, and development tendency of these active and passive thermal management technologies are reviewed in detail. Moreover, the environmental influences introduced by vibrations, shock, acceleration, and so on, on the thermal performance and reliability of the TMS are specially emphasized and discussed in detail, which are usually neglected in normal operating conditions. Eventually, the possible future directions are discussed, aiming to serve as a reference guide for engineers and promote the advancement of the next-generation electronics TMS in automobile and aircraft applications.<br/></div> © 2022 by the authors.
Number of references:185
Main heading:Cost effectiveness
Controlled terms:Automobile cooling systems - Automotive industry - Carbon dioxide - Emission control - Environmental management - Global warming - Heat flux - More electric aircraft - Silicon carbide - Temperature control - Vehicle performance - Wide band gap semiconductors
Uncontrolled terms:Active cooling - Aviation industry - CO 2 emission - Emission reduction - Environmental influences - High heat flux - Internal combustion engine vehicles - Management technologies - Passive cooling - Thermal Performance
Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 454.1 Environmental Engineering, General - 454.2 Environmental Impact and Protection - 641.2 Heat Transfer - 652.1 Aircraft, General - 662.1 Automobiles - 662.4 Automobile and Smaller Vehicle Components - 663.1 Heavy Duty Motor Vehicles - 712.1 Semiconducting Materials - 731.3 Specific Variables Control - 804.2 Inorganic Compounds - 911.2 Industrial Economics
DOI:10.3390/en15218316
Funding details: Number: 52206113, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This research was funded by the National Natural Science Foundation of China (Grant No. 52206113) and the Youth Innovation Promotion Association, CAS (Grant No. 2022410).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 346>
Accession number:20224713152145
Title:Effective half-wavelength pitch optical phased array design for aliasing-free 2D beam steering
Authors:Lei, Yufang (1, 2); Zhang, Lingxuan (1, 2); Xue, Yulong (1, 2); Ren, Yangming (1, 2); Zhang, Qihao (1, 2); Zhang, Wenfu (1, 2); Sun, Xiaochen (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:32
Issue date:November 10, 2022
Publication year:2022
Pages:9423-9428
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method to design an optical phased array (OPA) simultaneously realizing both narrow beam width and aliasing-free 2D beam steering without the need to arrange the antennas at actual half-wavelength pitch. The method realizes an effective half-wavelength pitch in one direction formed by location projection of the antennas. The distances between the antennas in the other direction can be sufficiently large to form an effective large aperture realizing narrow beam width without needing a long grating. The presented method is proven by both theory and numerical simulations to achieve an equivalent grating-lobe-free far field of an ordinary half-wavelength pitch design. One design example exhibits 180<sup>◦</sup> steering with a minimal beam width of 0.4<sup>◦</sup> * 0.032<sup>◦</sup> and a sidelobe suppression ratio of >13 dB.<br/></div> Journal © 2022 Optica Publishing Group.
Number of references:29
Main heading:Design
Controlled terms:Antenna phased arrays - Numerical methods
Uncontrolled terms:Aliasing - Array design - Beam widths - Beam-steering - Far-field - Grating lobes - Half wavelength - Large aperture - Narrow beams - Optical phased arrays
Classification code:921.6 Numerical Methods
Numerical data indexing:Decibel 1.30E+01dB
DOI:10.1364/AO.474504
Funding details: Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. Natural Science Foundation of Shaanxi Province (2019JQ-447); China Postdoctoral Science Foundation (2020M673523); National Natural Science Foundation of China (12004421, 61635013, 61675231).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 347>
Accession number:20223612691790
Title:Review of the Development of Interferometric Spectral Imaging Technology (Invited)
Title of translation:干 涉 光 谱 成 像 技 术 发 展 的 回 顾（特 邀）
Authors:Hu, Bingliang (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710072, China
Corresponding author:Hu, Bingliang(hbl@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751401
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Interferometric spectroscopic imaging technology has undergone decades of experience accumulation and technological development. At present，it has extensive and mature applications in the fields of astronomical exploration， atmospheric pollution， water environment monitoring， surface geological mineral exploration，vegetation survey and other fields. Compared with dispersive and filter-type spectral imaging techniques，interferometric spectroscopic imaging technology has the advantages of high resolution，high sensitivity，and high wave number accuracy. According to the type of optical path acquisition method，this paper summarizes the research status of interferometric spectroscopic imaging technology at domestic and abroad from three aspects：time modulation，spatial modulation，and spatiotemporal joint modulation. Then introduces and reviews their representative research results. For time-modulated interferometric spectroscopy imaging，the interferogram acquired by the detector can be seen as a collection of time series. Interference maps are acquired one by one over time. The main advantages of this technique are the high spectral resolution and detection sensitivity. However，this type of optical system requires a continuously moving precision part to produce an optical path difference that changes over time. The main technical difficulty of time-modulated interferometer spectroscopy is how to develop a set of stable，reliable and long-working high-precision moving mirror scanning system. Spatial modulation interferometric spectroscopy records interference information at different cell positions of the detector for different optical path differences of the measured target. A complete interference map of the target can be obtained with a single exposure. This technology fundamentally overcomes the problem of precision moving mirror scanning system in time-modulated spectrometers， and also improves the real-time performance of obtaining spectral information. The essence of spatiotemporal combined modulation interferometer spectroscopy is to insert a transverse shear interferometer into the camera system. Since there is no slit in the front optical system，this type of instrument not only has the characteristics of high detection sensitivity，high stability and high signal-to-noise ratio，but also has the advantages of high throughput. It can be seen that different modulation methods use different optical path structures. Of course，each spectroscopic principle also has its advantages and disadvantages，which can be applied to different application areas. The research of interferometric spectroscopy imaging technology has always attracted much attention. There is no doubt that the emergence of relevant new technologies is often very eye-catching. Over the past three decades，interferometric imaging spectroscopy technology has been rapidly developed in the field of remote sensing，and has gradually become an effective tool for high-resolution remote sensing detection. With the rapid development of detector focal plane array，precision machinery，high-speed data transmission and storage compression，data quantification and computer image processing，the future of spectral imagers will have a large field of view，wide spectral range，high sensitivity，high spectral resolution，high spatial resolution and other performance. Moreover，the technology gradually tends to develop in the direction of new principles，integration，automation，wireless，intelligence，single cylinder and miniaturization.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:98
Main heading:Interferometers
Controlled terms:Imaging systems - Interferometry - Mirrors - Modulation - Optical systems - Signal to noise ratio - Spectral resolution - Spectrometers - Surveys
Uncontrolled terms:Imaging technology - Interferometric spectroscopic imaging - Interferometric spectroscopy - Interferometrics - Joint modulation - Spatial modulations - Spatio-temporal - Spatio-temporal joint modulation - Spectroscopic imaging - Time-modulation
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.3788/gzxb20225107.0751401
Funding details: Number: 61905275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:item： National Natural Science Foundation of China（ No. 61905275）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 348>
Accession number:20223912806731
Title:High-resolution depth imaging with a small-scale SPAD array based on the temporal-spatial filter and intensity image guidance (Open Access)
Authors:Kang, Yan (1); Xue, Ruikai (1, 2); Wang, Xiaofang (1, 2); Zhang, Tongyi (1, 2); Meng, Fanxing (1, 2); Li, Lifei (1); Zhao, Wei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Kang, Yan(kangyan@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:19
Issue date:September 12, 2022
Publication year:2022
Pages:33994-34011
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Currently single-photon avalanche diode (SPAD) arrays suffer from a small-scale pixel count, which makes it difficult to achieve high-resolution 3D imaging directly through themselves. We established a CCD camera-assisted SPAD array depth imaging system. Based on illumination laser lattice generated by a diffractive optical element (DOE), the registration of the low-resolution depth image gathered by SPAD and the high-resolution intensity image gathered by CCD is realized. The intensity information is used to guide the reconstruction of a resolution-enhanced depth image through a proposed method consisting of total generalized variation (TGV) regularization and temporal-spatial (T-S) filtering algorithm. Experimental results show that an increasement of 4 × 4 times for native depth image resolution is achieved and the depth imaging quality is also improved by applying the proposed method.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:47
Main heading:Image resolution
Controlled terms:Beamforming - CCD cameras - Image enhancement - Imaging systems - Information filtering - Optical lattices - Particle beams
Uncontrolled terms:Depth image - Depth imaging - Filter images - High resolution - High-resolution depth - Intensity images - Single-photon avalanche diode arrays - Small scale - Spatial filters - Spatial intensity
Classification code:711.2 Electromagnetic Waves in Relation to Various Structures - 714.2 Semiconductor Devices and Integrated Circuits - 742.2 Photographic Equipment - 744.8 Laser Beam Interactions - 746 Imaging Techniques - 903.1 Information Sources and Analysis - 932.1 High Energy Physics
DOI:10.1364/OE.459787
Funding details: Number: 095920211305, Acronym: -, Sponsor: -;Number: 62001473,62171443, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2022GY-009, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:Acknowledgments. Y. Kang thanks Research Fund from Youth Talents Promotion Program of Xi’an and State Key Laboratory of Transient Optics and Photonics.Funding. National Natural Science Foundation of China (62001473, 62171443); Key Research and Development Projects of Shaanxi Province (2022GY-009); Youth Talents Promotion Program of Xi ’an (095920211305); State Key Laboratory of Transient Optics and Photonics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 349>
Accession number:20224212985351
Title:Retrieving Water Quality Parameters from Noisy-Label Data Based on Instance Selection (Open Access)
Authors:Liu, Yuyang (1, 2); Liu, Jiacheng (1, 2); Zhao, Yubo (1); Wang, Xueji (1); Song, Shuyao (1, 2); Liu, Hong (1); Yu, Tao (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:19
Issue date:October 2022
Publication year:2022
Article number:4742
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">As an important part of the "air–ground" integrated water quality monitoring system, the inversion of water quality from unmanned airborne hyperspectral image has attracted more and more attention. Meanwhile, unmanned aerial vehicles (UAVs) have the characteristics of small size, flexibility and quick response, and can complete the task of water environment detection in a large area, thus avoiding the difficulty in obtaining satellite data and the limitation of single-point monitoring by ground stations. Most researchers use UAV for water quality monitoring, they take water samples back to library or directly use portable sensors for measurement while flying drones at the same time. Due to the UAV speed and route planning, the actual sampling time and the UAV passing time cannot be guaranteed to be completely synchronized, and there will be a difference of a few minutes. For water quality parameters such as chromaticity (chroma), chlorophyll-a (chl-a), chemical oxygen demand (COD), etc., the changes in a few minutes are small and negligible. However, for the turbidity, especially in flowing water body, this value of it will change within a certain range. This phenomenon will lead to noise error in the measured suspended matter or turbidity, which will affect the performance of regression model and retrieval accuracy. In this study, to solve the quality problem of label data in a flowing water body, an unmanned airborne hyperspectral water quality retrieval experiment was carried out in the Xiao River in Xi’an, China, which verified the rationality and effectiveness of label denoising analysis of different water quality parameters. To identify noisy label instances efficiently, we proposed an instance selection scheme. Furthermore, considering the limitation of the dataset samples and the characteristic of regression task, we build a 1DCNN model combining a self attention mechanism (SAM) and the network achieves the best retrieving performance on turbidity and chroma data. The experiment results show that, for flowing water body, the noisy-label instance selection method can improve retrieval performance slightly on the COD parameter, but improve greatly on turbidity and chroma data.<br/></div> © 2022 by the authors.
Number of references:43
Main heading:Water quality
Controlled terms:Aircraft detection - Antennas - Regression analysis - Spectroscopy - Turbidity - Unmanned aerial vehicles (UAV)
Uncontrolled terms:Aerial vehicle - Flowing waters - HyperSpectral - Hyperspectral image - Instance selection - Noisy labels - Noisy-label learning - Unmanned aerial vehicle - Water quality parameters - Waterbodies
Classification code:445.2 Water Analysis - 652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 741.1 Light/Optics - 922.2 Mathematical Statistics
DOI:10.3390/rs14194742
Funding details: Number: 2019SF-254, Acronym: -, Sponsor: -;Number: XDA23040101, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020-XXX-014-01, Acronym: -, Sponsor: National Defense Science and Technology Innovation Fund of the Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Defense Science and Technology Innovation Special Zone Project under Grant 2020-XXX-014-01, in part by the Chinese Academy of Sciences Strategic Science and Technology Pilot Project A under Grant XDA23040101, and in part by the Shanxi provincial key R&D plan project under Grant 2019SF-254.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 350>
Accession number:20224312992537
Title:Differentiate Visual Features with Guidance Signals for Video Captioning (Open Access)
Authors:Yang, Yifan (1, 2); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Sheng, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:CCRIS 2022 - Conference Proceeding: 2022 3rd International Conference on Control, Robotics and Intelligent System
Issue date:August 26, 2022
Publication year:2022
Pages:235-240
Language:English
ISBN-13:9781450396851
Document type:Conference article (CA)
Conference name:3rd International Conference on Control, Robotics and Intelligent System, CCRIS 2022
Conference date:August 26, 2022 - August 28, 2022
Conference location:Virtual, Online, China
Conference code:183363
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">The task of video captioning is to generate comprehensible and grammatically correct sentences which describe the main visual content of videos. Existing neural modules based methods improve the model interpretability by separately predicting words of different part-of-speech. However, the separation of different modules may lead to confusing semantics. In this work, a video captioning method referred to as Differentiate Visual Features with Guidance Signals (DVFGS) is proposed, which enhances the semantic consistency of the neural modules based method through guidance signals. This process is similar to the cell differentiation process, producing differences and having different effects on the whole. Extensive experiments performed on MSVD and MSR-VTT show that DVFGS pushes the limit of neural modules based video captioning methods forward.<br/></div> © 2022 ACM.
Number of references:41
Main heading:Semantics
Uncontrolled terms:Attention - Guidance signal - Interpretability - Module-based - Neural module - Part Of Speech - Semantic consistency - Video captioning - Visual content - Visual feature
DOI:10.1145/3562007.3562052
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 351>
Accession number:20224913203720
Title:Real-time air turbulence calibration of large aperture camera image quality measurement system
Authors:Liu, Shangkuo (1, 2); Liu, Kai (1); Wang, Zhengfeng (1); Kewei, E. (1); Wang, Tao (1); Zhou, Yan (1); Zhao, Jianke (1); Yao, Baoli (1)
Author affiliation:(1) Chinese Academy of Science, Xi’an Institute of Optics and Precision Mechanics, No.17 Xinxi Road, Xi’an; 710119, China; (2) University of Chinese Academy of Science, No.19(A) Yuquan Road, Beijing; 100049, China
Corresponding author:Liu, Shangkuo(liushangkuo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12448
Part number:1 of 1
Issue title:5th Optics Young Scientist Summit, OYSS 2022
Issue date:2022
Publication year:2022
Article number:124481D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510660014
Document type:Conference article (CA)
Conference name:5th Optics Young Scientist Summit, OYSS 2022
Conference date:September 16, 2022 - September 19, 2022
Conference location:Fuzhou, China
Conference code:184450
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">When measuring image qualities of large aperture cameras, many factors like people moving around, blowing of air conditioners outlets, thermal convection, etc., will give rise to air turbulence (AT). AT mainly induces non-uniform distribution of air components in the image chain of large aperture camera image quality measurement systems, which will lead to variations of system wavefront errors. Thus, AT will introduce errors to measurement results of traditional image quality evaluation methods. Those errors increase with the camera aperture and are usually time-varying. This paper proposes a method to calibrate AT in real time when measuring image qualities of large aperture cameras. A defocused star point target (DSPT) is added to traditional test targets (TTT). The camera under test can capture images of TTT and DSPT simultaneously. The distance between the effective area of TTT and the DSPT is carefully designed so that the corresponding images do not overlap with each other. We calibrate AT induced wavefront errors by processing the DSPT images with phase retrieval method. Experimental results of AT induced wavefront errors calibrated by the proposed method are presented.<br/></div> © 2022 SPIE.
Number of references:8
Main heading:Cameras
Controlled terms:Calibration - Errors - Heat convection - Image quality - Search engines - Wavefronts
Uncontrolled terms:Air turbulence - Camera images - Large aperture - Large aperture camera - Optical test - Optical- - Phase retrieval - Point targets - Real- time - Wavefront errors
Classification code:641.2 Heat Transfer - 723 Computer Software, Data Handling and Applications - 742.2 Photographic Equipment
DOI:10.1117/12.2638454
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 352>
Accession number:20220511562886
Title:Hyperspectral Unmixing Using Nonlocal Similarity-Regularized Low-Rank Tensor Factorization
Authors:Yuan, Yuan (1); Dong, Le (2, 3); Li, Xuelong (1)
Author affiliation:(1) School of Artificial Intelligence, Optics and Electronics (IOPEN), Northwestern Polytechnical University, Xi'an, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yuan, Yuan(y.yuan1.ieee@qq.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Recently, methods based on nonnegative tensor factorization (NTF), which benefits from the tensor representation of hyperspectral imagery (HSI) without any information loss, have attracted increasing attention. However, most existing methods fail to explore the internal spatial structure of data, resulting in low unmixing performance. Moreover, when the algorithm is optimized, the solution is unstable. In this article, a regularizer based on nonlocal tensor similarity is proposed, which can not only fully preserve the global information of HSI but also mine the internal information of data in the spatial domain. HSI is regarded as a 3-D tensor and is directly subjected to endmember extraction and abundance estimation. To fully explore the structural characteristics of data, we simultaneously use the local smoothing and low tensor rank prior of the data to constrain the unmixing model. First, several 4-D tensor groups can be obtained after the nonlocal similarity structure of HSI is learned. Subsequently, a low tensor rank prior is applied to each 4-D tensor, which can fully simulate the nonlocal similarity in the image. In addition, total variation (TV) is also used to explore the local spatial relationship of data, which can generate a smooth abundance map through edge preservation. The optimization is solved by the ADMM algorithm. Experiments on synthetic and real data illustrate the superiority of the proposed method.<br/></div> © 1980-2012 IEEE.
Number of references:50
Main heading:Tensors
Controlled terms:Factorization - Spectroscopy
Uncontrolled terms:Hyperspectral unmixing - Information loss - Low tensor rank - Non-local similarities - Nonnegative tensor factorization - Nonnegative tensor factorizations - Tensor factorization - Tensor ranks - Tensor representation - Unmixing
Classification code:921 Mathematics - 921.1 Algebra
DOI:10.1109/TGRS.2021.3095488
Funding details: Number: 61632018, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020YFB2103902, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61825603, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Key Research and Development Project under Grant 2020YFB2103902, in part by the National Science Fund for Distinguished Young Scholars under Grant 61825603, and in part by the Key Program of National Natural Science Foundation of China under Grant 61632018.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 353>
Accession number:20221611980797
Title:Design and Ground Verification for Multispectral Camera on the Mars Tianwen-1 Rover
Authors:Yang, Jian-Feng (1); Liu, Da-Wei (2); Xue, Bin (1); Lyu, Juan (1); Liu, Jian-Jun (2); Li, Fu (1); Ren, Xin (2); Ge, Wei (1); Liu, Bin (2); Ma, Xiao-Long (1); Lyu, Bao-Gang (1); Ruan, Ping (1); Qiao, Wei-Dong (1); Lu, Di (1)
Author affiliation:(1) Lunar and Deep Space Exploration Technology Laboratory of Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) National Astronomical Observatories, Chinese Academy of Science, Beijing; 100012, China
Corresponding authors:Lyu, Juan(lvjuan@opt.ac.cn); Liu, Da-Wei(liudw@nao.cas.cn)
Source title:Space Science Reviews
Abbreviated source title:Space Sci Rev
Volume:218
Issue:3
Issue date:April 2022
Publication year:2022
Article number:19
Language:English
ISSN:00386308
E-ISSN:15729672
CODEN:SPSRA4
Document type:Journal article (JA)
Publisher:Springer Science and Business Media B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">As part of China’s first Mars exploration mission ‘Tianwen-1’, the Zhurong rover has successfully touched down on the surface of southern Utopia Planitia on May 15th 2021 and has been conducting surface operations for several months. A multispectral camera (MSCam), as an important payload onboard the Zhurong rover, aims to acquire multispectral images to investigate the morphological characteristics and mineralogic properties of the Martian surface. In this study, a detailed optimization design for the MSCam was carried out to achieve the abovementioned scientific objectives. The MSCam can perform multispectral imaging without chromatic aberration by utilizing eight narrow bandwidth filters made of glass of different thicknesses. Clear images of observation targets at different distances can be obtained by utilizing the six focal plane compensation lenses of varying thicknesses through the rotation of wheels. Calibration experiments, key specification tests and ground verification tests were also conducted in this study. Our results show that the pixel resolution of the MSCam can reach 0.146 mrad, the system static modulation transfer function (MTF) of the MSCam is better than 0.25@525 nm, and the signal-to-noise ratio (SNR) is higher than 40 dB, all of which allow clear imaging and accurate multispectral data acquisition of the targets. The high-resolution images obtained by the MSCam will provide detailed geological context for the data interpretation of other payloads on the rover, such as the Mars surface composition detector (MarSCoDe). The mineralogy information of the targets (e.g., fresh rock, dune) indicated by the MSCam multispectral data will also help to constrain the surface material composition of Mars.<br/></div> © 2022, The Author(s), under exclusive licence to Springer Nature B.V.
Number of references:28
Main heading:Calibration
Controlled terms:Martian surface analysis - Minerals - Aberrations - Rovers - Data acquisition - Cameras - Signal to noise ratio
Uncontrolled terms:Conducting surfaces - Exploration missions - Ground tests - Mars exploration - Morphological characteristic - Multi-spectral data - Multispectral cameras - Multispectral images - Property - Surface operations
Classification code:482.2 Minerals - 655.1 Spacecraft, General - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment
Numerical data indexing:Absorbed dose 1.46E-06Gy, Decibel 4.00E+01dB, Size 5.25E-07m
DOI:10.1007/s11214-022-00886-3
Funding details: Number: 11941002, Acronym: NNSFC, NNSF, NSF, NSFC, Sponsor: National Natural Science Foundation of China;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 354>
Accession number:20224112865019
Title:Influence of multiphoton events on the quantum enhanced phase estimation
Authors:Zhang, Mingran (1, 2); Huang, Long (1, 2); Liu, Yang (1, 2); Zhao, Wei (1, 2); Wang, Weiqiang (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Weiqiang(wwq@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:21
Issue date:October 10, 2022
Publication year:2022
Pages:37833-37845
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Quantum metrology can approach measurement precision of Heisenberg Limit using an ideal quantum source, which has attracted a great interest in fundamental physical studies. However, the quantum metrology precision is impressionable to the system noise in experiments. In this paper, we analyze the influence of multiphoton events on the phase estimation precision when using a nondeterministic single photon source. Our results show there are an extra bias and quantum enhanced region restriction due to multiphoton events, which declines the quantum phase estimation precision. A limitation of multiphoton probability is obtained for quantum enhanced phase estimation accuracy under different experimental model. Our results provide beneficial suggestions for improving quantum metrology precision in future experiments.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:65
Main heading:Particle beams
Uncontrolled terms:Estimation precision - Experimental modelling - Heisenberg limit - Measurement precision - Multiphotons - Phase-estimation - Quantum metrology - Quantum phase estimation - Single-photon source - System noise
Classification code:932.1 High Energy Physics
DOI:10.1364/OE.468727
Funding details: Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (62075238).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 355>
Accession number:20220911734915
Title:Computer-aided alignment method for AIMS solar telescope
Authors:E., Kewei (1); Fu, Xin (1); Shen, Yuliang (2); Zhao, Jianke (3); Wang, Tao (1); Chang, Ming (1); Liu, Shangkuo (1); Xue, Xun (1); Zhou, Yan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 70119, China; (2) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (3) University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:E., Kewei(ekewei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121664V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">AIMS is an infrareds optical system for the accurate measurement of solar magnetic field, which is a national major scientific research project currently developed. The guiding optical system of AIMS is an off-axis Gregorian system, due to the designed minimum angle between the optical axis of the optical system and horizontal plane is 14.036°, a sub-aperture stitching test approach is developed to test the wavefront of the system. That makes the process of precision alignment of the system very difficult and laborious. Therefore, we developed a two-step alignment approach that based on merit function regression method, the developed method can make alignment of AIMS guiding optical system efficiency and accuracy. In this paper, we explain the detailed two-step alignment method and apply it to the real alignment of AIMS guiding system. Aided with sub-aperture stitching measurements, the AIMS guiding system is aligned and the results show that in 0.076λrms wavefront error in effective aperture was achieved.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Alignment
Controlled terms:Telescopes - Wavefronts - Regression analysis - Optical testing - Optical systems
Uncontrolled terms:Accurate measurement - AIMS - Computer-aided alignment method - Guiding systems - Infrared optical systems - Measurements of - Solar telescope - Sub-aperture stitching - Sub-aperture testing - Subaperture
Classification code:601.1 Mechanical Devices - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics
DOI:10.1117/12.2617389
Funding details: Number: E15151Z1, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:gratefully acknowledges the financial support from the Youth Innovation Promotion AssociationOne of the authors gratefully acknowledges the financial support from the Youth Innovation Promotion Association XIOPM-CAS (E15151Z1).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 356>
Accession number:20220911734986
Title:Infrared dim target detecting algorithm based on multi-feature and spatio-temporal fusion
Authors:Bai, Mei (1, 2); Zhang, Jian (1); Zhao, Hui (1)
Author affiliation:(1) Xi'An INSTITUTE of OPTICS and PRECISION MECHANICS of CAS, China; (2) Shan'Xi NORMAL UNIVERSITY, China
Corresponding author:Zhang, Jian(zhjian@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121666W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Focusing on the detection of infrared dim targets in space-based imaging systems, a multi-feature and spatio-temporal fusion algorithm is proposed. By analyzing characteristics of target and background in the image, firstly, an algorithm combining TOP-HAT and improved partial differentiation method is proposed for image preprocessing; Secondly, the local entropy feature and local gradient feature of the small target image are extracted from images to fuse, an improved interframe method is used for spatio-temporal fusion to enhance the target signal, then threshold segmentation is used to obtain the detection result. Theoretical analysis and experiments show that the algorithm proposed in this paper can not only suppress the background and enhance the target well; in addition, it is possible to realize the on-chip transplantation of hardware.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:16
Main heading:Image enhancement
Controlled terms:Feature extraction - Image segmentation
Uncontrolled terms:Dim target - Dim target detection - Improved-PM - Infrared dim target detection - Multi-feature fusion - Multifeatures - Space-based imaging systems - Spatio-temporal fusions - Target detecting algorithms - Top hat
Classification code:723.2 Data Processing and Image Processing
DOI:10.1117/12.2617906
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 357>
Accession number:20220114265
Title:Pairwise Comparison Network for Remote Sensing Scene Classification
Authors:Zhang, Yue (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) The Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) The University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:May 17, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing scene classification aims to assign a specific semantic label to a remote sensing image. Recently, convolutional neural networks have greatly improved the performance of remote sensing scene classification. However, some confused images may be easily recognized as the incorrect category, which generally degrade the performance. The differences between image pairs can be used to distinguish image categories. This paper proposed a pairwise comparison network, which contains two main steps: pairwise selection and pairwise representation. The proposed network first selects similar image pairs, and then represents the image pairs with pairwise representations. The self-representation is introduced to highlight the informative parts of each image itself, while the mutual-representation is proposed to capture the subtle differences between image pairs. Comprehensive experimental results on two challenging datasets (AID, NWPU-RESISC45) demonstrate the effectiveness of the proposed network. The code are provided in https://github.com/spectralpublic/PCNet.git.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Remote sensing
Controlled terms:Convolution - Convolutional neural networks - Semantics
Uncontrolled terms:Comparison networks - Convolutional neural network - Image pairs - Multi-branch method - Pair-wise comparison - Performance - Remote sensing scene classification - Remote-sensing - Scene classification - Specific semantics
Classification code:716.1 Information Theory and Signal Processing
DOI:10.48550/arXiv.2205.08147
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2205.08147v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 358>
Accession number:20222112134001
Title:Experimental Study on the Exploration of Camera Scanning Reflective Fourier Ptychography Technology for Far-Field Imaging (Open Access)
Authors:Yang, Mingyang (1, 2); Fan, Xuewu (1); Wang, Yuming (1, 2); Zhao, Hui (1)
Author affiliation:(1) Space Optical Technology Research Department, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi’an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:9
Issue date:May-1 2022
Publication year:2022
Article number:2264
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier ptychography imaging is a powerful phase retrieval method that can be used to realize super-resolution. In this study, we establish a mathematical model of long-distance camera scanning based on reflective Fourier ptychography imaging. In order to guarantee the effective recovery of a high-resolution image in the experiment, we analyze the influence of laser coherence in different modes and the surface properties of diverse materials for diffused targets. For the analysis, we choose a single-mode fiber laser as the illumination source and metal materials with high diffused reflectivity as the experimental targets to ensure the validity of the experimental results. Based on the above, we emulate camera scanning with a single camera attached to an X-Y translation stage, and an experimental system with a working distance of 3310 mm is used as an example to image a fifty-cent coin. We also perform speckle analysis for rough targets and calculate the average speckle size using a normalized autocorrelation function in different positions. The method of calculating the average speckle size for everyday objects provides the premise for subsequent research on image quality evaluation; meanwhile, the coherence of the light field and the targets with high reflec-tivity under this experiment provide an application direction for the further development of the technique, such as computer vision, surveillance and remote sensing.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:31
Main heading:Scanning
Controlled terms:Fiber lasers - Fourier transforms - Cameras - Speckle - Synthetic apertures - Single mode fibers - Quality control - Remote sensing
Uncontrolled terms:Camera-scanning - Coherent illumination - Far-field imaging - Fourier - Fourier ptychography - High resolution - High-resolution imag-ing - Phase retrieval - Retrieval methods - Speckle size
Classification code:716.2 Radar Systems and Equipment - 741.1 Light/Optics - 741.1.2 Fiber Optics - 742.2 Photographic Equipment - 744.4 Solid State Lasers - 913.3 Quality Assurance and Control - 921.3 Mathematical Transformations
Numerical data indexing:Size 3.31E+00m
DOI:10.3390/rs14092264
Funding text:This research was funded by the Major Project on the High-Resolution Earth Observation System (GFZX04014307).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 359>
Accession number:20220811698985
Title:Learning a Fully Connected U-Net for Spectrum Reconstruction of Fourier Transform Imaging Spectrometers (Open Access)
Authors:Chen, Tieqiao (1, 2); Su, Xiuqin (1, 3); Li, Haiwei (1); Li, Siyuan (1); Liu, Jia (1, 2); Zhang, Geng (1); Feng, Xiangpeng (1); Wang, Shuang (1); Liu, Xuebin (1); Wang, Yihao (1, 2); Zou, Chunbo (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:4
Issue date:February-2 2022
Publication year:2022
Article number:900
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier transform imaging spectrometers (FTISs) are widely used in global hyperspectral remote sensing due to the advantages of high stability, high throughput, and high spectral resolution. Spectrum reconstruction (SpecR) is a classic problem of FTISs determining the acquired data quality and application potential. However, the state-of-the-art SpecR algorithms were restricted by the length of maximum optical path difference (MOPD) of FTISs and apodization processing, resulting in a decrease in spectral resolution; thus, the applications of FTISs were limited. In this study, a deep learning SpecR method, which directly learned an end-to-end mapping between the interfer-ence/spectrum information with limited MOPD and without apodization processing, was proposed. The mapping was represented as a fully connected U-Net (FCUN) that takes the interference fringes as the input and outputs the highly precise spectral curves. We trained the proposed FCUN model using the real spectra and simulated pulse spectra, as well as the corresponding simulated interference curves, and achieved good results. Additionally, the performance of the proposed FCUN on real interference and spectral datasets was explored. The FCUN could obtain similar spectral values compared with the state-of-the-art fast Fourier transform (FFT)-based method with only 150 and 200 points in the interferograms. The proposed method could be able to enhance the resolution of the reconstructed spectra in the case of insufficient MOPD. Moreover, the FCUN performed well in visual quality using noisy interferograms and gained nearly 70% to 80% relative improvement over FFT for the coefficient of mean relative error (MRE). All the results based on simulated and real satellite datasets showed that the reconstructed spectra of the FCUN were more consistent with the ideal spectrum compared with that of the traditional method, with higher PSNR and lower values of spectral angle (SA) and relative spectral quadratic error (RQE).<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:38
Main heading:Fast Fourier transforms
Controlled terms:Photomapping - Deep learning - Hyperspectral imaging - Spectral resolution - Optical remote sensing - Interferometry
Uncontrolled terms:Deep learning - Fourier transform imaging spectrometer - Fourier transform imaging spectrometers - Fully connected U-net - Optical path difference - Spectra's - Spectrum reconstruction - State of the art - U-net
Classification code:405.3 Surveying - 461.4 Ergonomics and Human Factors Engineering - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography - 746 Imaging Techniques - 921.3 Mathematical Transformations - 941.4 Optical Variables Measurements
Numerical data indexing:Percentage 7.00E+01% to 8.00E+01%
DOI:10.3390/rs14040900
Funding details: Number: NO.NODAOP2021007, Acronym: -, Sponsor: -;Number: NO.2021JQ-324, Acronym: -, Sponsor: -;Number: 41706217,42176182,NO.2019JQ-929, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: NO.2020JQ-436, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding: This study was supported by the Natural Science Foundation of Shaanxi Province (Grant NO.2020JQ-436), the Open Research Fund of National Earth Observation Data Center (Grant NO.NODAOP2021007), the National Science Basic Research Foundation of Shaanxi Province (Grant NO.2021JQ-324), the National Natural Science Foundation of China under Grants (Grant NO. 41706217, 42176182), the National Science Basic Research Foundation of Shaanxi Province (Grant NO.2019JQ-929), and Youth Innovation Promotion Association CAS.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 360>
Accession number:20222212177677
Title:A Data Mining Algorithm for Hyperspectral Target Detection Based on UAV
Authors:Zhou, Jian (1); Qiu, Shi (2); Wang, Zhuping (3); Nie, Cong (1)
Author affiliation:(1) Xi’an Modern Control Technology Research Institute, Xi’an, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Xi’an Institute of Electromechanical Information Technology, Xi’an, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:Lecture Notes in Electrical Engineering
Abbreviated source title:Lect. Notes Electr. Eng.
Volume:861 LNEE
Part number:1 of 1
Issue title:Proceedings of 2021 International Conference on Autonomous Unmanned Systems, ICAUS 2021
Issue date:2022
Publication year:2022
Pages:63-73
Language:English
ISSN:18761100
E-ISSN:18761119
ISBN-13:9789811694912
Document type:Conference article (CA)
Conference name:International Conference on Autonomous Unmanned Systems, ICAUS 2021
Conference date:September 24, 2021 - September 26, 2021
Conference location:Changsha, China
Conference code:275179
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">The hyperspectral image has spatial resolution and inter-spectral resolution, which can visually display the information of the ground object. It is of great significance to the typical targets of hyperspectral data mining. With the development of drone technology, it is possible to detect targets with airborne hyper spectrometers, thereby greatly improving the perception ability of unmanned aerial vehicles. For this reason, we have carried out research on target data mining based on the advantages of hyperspectral detection of ground object attributes and the strong flexibility of UAVs. First, on the basis of acquiring hyper spectral images, normalize the images, construct an edge extraction model, and introduce the idea of clustering to find spatially similar regions. Then a Dynamic Time Warping model is constructed to extract the features between the spectra, and finally, the DEC algorithm is improved, and a deep network is used to achieve typical target clustering.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Number of references:20
Main heading:Unmanned aerial vehicles (UAV)
Controlled terms:Aircraft detection - Antennas - Clustering algorithms - Data mining - Object detection - Spectroscopy
Uncontrolled terms:Clusterings - Data mining algorithm - Dynamic time warping - Ground objects - HyperSpectral - Hyperspectral target detection - Inter-spectral - Spatial - Spatial resolution - Typical targets
Classification code:652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis
DOI:10.1007/978-981-16-9492-9_7
Funding details: Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 2020M682144, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:Acknowledgments. This work is supported by Postdoctoral Science Foundation of China under Grant No. 2020M682144. Science and Technology Rising Star of Shaanxi Youth under Grant No. 2021KJXX-61.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 361>
Accession number:20221912076571
Title:Retrieval of the planetary boundary layer height from lidar measurements by a deep-learning method based on the wavelet covariance transform (Open Access)
Authors:Mei, Liang (1); Wang, Xiaoqi (1); Gong, Zhenfeng (1); Liu, Kun (1); Hua, Dengxin (1, 2); Wang, Xiaona (3)
Author affiliation:(1) School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian; 116024, China; (2) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (3) School of Physics, Dalian University of Technology, Dalian; 116024, China
Corresponding author:Wang, Xiaona(wangxn@dlut.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:10
Issue date:May 9, 2022
Publication year:2022
Pages:16297-16312
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Understanding and characterization of the planetary boundary layer (PBL) are of great importance in terms of air pollution management, weather forecasting, modelling of climate change, etc. Although many lidar-based approaches have been proposed for the retrieval of the PBL height (PBLH) in case studies, development of a robust lidar-based algorithm without human intervention is still of great challenging. In this work, we have demonstrated a novel deep-learning method based on the wavelet covariance transform (WCT) for the PBLH evaluation from atmospheric lidar measurements. Lidar profiles are evaluated according to the WCT with a series of dilation values from 200 m to 505 m to generate 2-dimensional wavelet images. A large number of wavelet images and the corresponding PBLH-labelled images are created as the training set for a convolutional neural network (CNN), which is implemented based on a modified VGG16 (VGG - Visual Geometry Group) convolutional neural network. Wavelet images obtained from lidar profiles have also been prepared as the test set to investigate the performance of the CNN. The PBLH is finally retrieved by evaluating the predicted PBLH-labelled image and the wavelet coefficients. Comparison studies with radiosonde data and the Micro-Pulse-Lidar Network (MPLNET) PBLH product have successfully validated the promising performance of the deep-learning method for the PBLH retrieval in practical atmospheric sensing.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Number of references:60
Main heading:Optical radar
Controlled terms:Weather forecasting - Convolutional neural networks - Deep learning - Boundary layer flow - Climate change - Convolution - Air pollution - Learning systems - Wavelet transforms - Boundary layers
Uncontrolled terms:Boundary layer heights - Convolutional neural network - Labeled images - Learning methods - Lidar measurements - Lidar profiles - Performance - Planetary boundary layers - Wavelet covariance transform - Wavelet image
Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451 Air Pollution - 461.4 Ergonomics and Human Factors Engineering - 631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 921.3 Mathematical Transformations
Numerical data indexing:Size 2.00E+02m to 5.05E+02m
DOI:10.1364/OE.454094
Funding details: Number: -, Acronym: NASA, Sponsor: National Aeronautics and Space Administration;Number: 2020RQ018, Acronym: -, Sponsor: Dalian High-Level Talent Innovation Program;Number: 62075025, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (62075025); Dalian High-Level Talent Innovation Program (2020RQ018).Acknowledgments. The authors greatly acknowledge Zheng Kong and Teng Ma for the help on the experimental work. The MPLNET project is funded by the NASA Radiation Sciences Program and Earth Observing System. We thank the MPLNET (PI: Carlo Wang) for its effort in establishing and maintaining the EPA-NCU site. The authors also wish to thank editors for the extension of the due date for revision.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 362>
Accession number:20231013694139
Title:Low-light Image Enhancement Method Based on Shifted Window Multi-head Self-attention U-shaped Network
Title of translation:基于移位窗口多头自注意力U型网络的低照度图像增强方法
Authors:Sun, Bangyong (1, 2); Zhao, Xingyun (1); Wu, Siyuan (2); Yu, Tao (2)
Author affiliation:(1) College of Printing, Packaging and Digital Media, Xi’an University of Technology, Xi’an; 710048, China; (2) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology
Abbreviated source title:Dianzi Yu Xinxi Xuebao
Volume:44
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:3399-3408
Language:Chinese
ISSN:10095896
CODEN:DKXUEC
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Considering the difficult problems of brightness enhancement, noise suppression and maintaining texture color consistency in the low-light image enhancement model, a low-light image enhancement method based on the shifted window self-attention mechanism is proposed. Based on the U-shaped structure and the multi-head self-attention model of shifted windows, an image enhancement network composed of encoders, decoders and jump connections is constructed. The feature extraction advantages of the self-attention mechanism are applied to the field of low-light image enhancement and long-term dependence between image feature information is established, which can obtain global features effectively. The proposed method is compared width current popular algorithms in quantitative and qualitative comparison experiments, subjectively, the brightness of the image and noise suppression are significantly improved, and simultaneously better maintains the color information that highlights the texture details by the proposed method. In terms of objective indicators such as Peak Signal-to-Noise Ratio(PSNR), Structural SIMilarity index(SSIM), and Learned Perceptual Image Patch Similarity (LPIPS), which are improved 0.35 dB, 0.041 and 0.031 respectively compared with the optimal values of other methods. The experimental results show that the subjective perception quality and objective evaluation indicators of low-light images can be effectively improved by the proposed method, indicating a certain application value.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:23
Main heading:Image enhancement
Controlled terms:Deep learning - Image texture - Luminance - Signal to noise ratio - Textures
Uncontrolled terms:Attention mechanisms - Attention model - Color consistency - Deep learning - Images processing - Low-light image enhancement - Low-light images - Noise suppression - Shaped structures - U-shaped
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
Numerical data indexing:Decibel 3.50E-01dB
DOI:10.11999/JEIT211131
Funding details: Number: LSIT201801D, Acronym: -, Sponsor: -;Number: 2021GY-027, Acronym: -, Sponsor: -;Number: 62076199, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (62076199), The Key R&D Project of Shaan'xi Province (2021GY-027), The Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences (LSIT201801D)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 363>
Accession number:20224212968107
Title:Spatial domain sparse reconstruction algorithm of sheared beam imaging
Title of translation:剪切光束成像技术稀疏重构算法
Authors:Chen, Ming-Lai (1, 2, 3); Liu, Hui (1, 2, 3); Zhang, Yu (1, 3); Luo, Xiu-Juan (1, 2, 3); Ma, Cai-Wen (1, 2, 3); Yue, Ze-Lin (1, 2); Zhao, Jing (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Chen, Ming-Lai(chenminglai@opt.ac.cn); Ma, Cai-Wen(cwma@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:19
Issue date:October 5, 2022
Publication year:2022
Article number:194201
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Sheared beam imaging (SBI) is considered a computational imaging technique that transmits three sheared coherent laser beamlets for illumination, and a sensor array to receive the intensity of the speckle pattern reflected from the target. The SBI can be used to image remote objects through a turbulent medium with no need of any adaptive optics. However, while imaging low-orbit moving targets, the number of detectors of sensor array required by the receiving system of SBI is very large, and the development of sensor array is difficult and costly. In this work, a spatial domain sparse sampling technique is proposed for the SBI system through transmitting five laser beamlets to illuminate the target carrying more of its spectral information, which can reduce the number of detectors of the sensor array. Firstly, the principle of the sparse imaging technique is deduced. Then, a sparse reconstruction algorithm is studied. The phase difference and amplitude information of the target in the echo signal after sparse sampling can be extracted accurately by searching for the accurate positions of the beat frequency components. The wavefront phases can be demodulated by the least-squares method, and wavefront amplitude can be obtained by the algebraic operation of speckle amplitude. The reconstructed wavefront is used to formulate the two-dimension image of the target. Theoretically, without affecting the resolution, the number of detectors of the sensor array can be reduced to half of the traditional three-beam method, which breaks through the limitation that the detector spacing of sensor array is equal to the shear length of beamlet. From the simulation results, when the number of detectors of the sensor array is reduced by 50%, the proposed sparse reconstruction algorithm has almost the same quality as the reconstructed image with the traditional three-beam method.<br/></div> © 2022 Chinese Physical Society.
Number of references:27
Main heading:Compressed sensing
Controlled terms:Adaptive optics - Algebra - Computational Imaging - Image reconstruction - Least squares approximations - Speckle - Wavefronts
Uncontrolled terms:Beam imaging - Beamlets - Reconstruction algorithms - Sensors array - Sheared beam imaging - Sparse reconstruction - Sparse reconstruction algorithm - Sparse sampling - Spatial domain sparse sampling - Spatial domains
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 746 Imaging Techniques - 921.1 Algebra - 921.6 Numerical Methods
Numerical data indexing:Percentage 5.00E+01%
DOI:10.7498/aps.71.20220494
Funding details: Number: 2020JQ-438, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Project supported by the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2020JQ-438).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 364>
Accession number:20211310144189
Title:Using Triple Collocation Observations to Estimate Satellite Measurement Noise
Authors:Chen, Jun (1); Quan, Wenting (2); Wang, Kexin (3); Han, Qijin (4); Liu, Jia (5); Xing, Qianguo (6); Xu, Na (7)
Author affiliation:(1) School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Shaanxi Meteorological Service Center of Agricultural Remote Sensing and Economic Crop, Xi'an; 71000, China; (3) School of Ocean Sciences, China University of Geosciences, Beijing; 100083, China; (4) School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (5) Key Laboratory of Spectral Imaging Technology of Cas, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 71000, China; (6) Chinese Academy of Sciences, Yantai Institute of Coastal Zone Research, Yantai; 264003, China; (7) National Satellite Meteorological Center, China Meteorological Administration, Beijing; 100081, China
Corresponding authors:Chen, Jun(chenjun@xjtu.edu.cn); Xu, Na(xuna@cma.gov.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Knowing how much measurement noise is in a signal is critical for evaluating the overall performance of a satellite observation. We developed a triple collocation observation (TCO) algorithm for estimating measurement noise by collocation comparing the local deviations of three satellite data sets. When we evaluated our algorithm with a synthetic data set, the results showed that the algorithm effectively derived measurement noise from satellite signals despite the many intermission signal differences among the satellites. The TCO algorithm produced <6.66% uncertainty in the measurement noise estimates that we derived from the synthetic data set. In addition, to maximally isolate measurement noise from ocean color images, we developed a set of data quality control criteria to apply when identifying synchronous pixel pairs. Using images from the Medium Resolution Spectral Imager II (MERSI II), the Visible Infrared Imaging Radiometer Suite (VIIRS), and the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments, we applied our data quality control criteria and found that the TCO algorithm produced measurement noise consistent with the measured prelaunch or specifications for VIIRS and MERSI II instrument noise. However, the TCO measurement noise was significantly lower than the spaced MODIS noise because MODIS's extended service time likely produced instrument degradation. Overall, MODIS performed better than MERSI II but worse than VIIRS. Furthermore, we found that the residual error in remote sensing reflectance exponentially decreased as the measurement signal-to-noise ratio (MSNR) increased. Because of this exponential relationship, the MSNR should not be lower than 181 to achieve the <5% uncertainty goal of remote sensing reflectance at 443 nm that NASA proposed. Our results suggest that the TCO algorithm is an effective approach for comprehensively estimating and comparing instrument performance.<br/></div> © 1980-2012 IEEE.
Number of references:48
Main heading:Remote sensing
Controlled terms:Quality control - Spectroscopy - Radiometers - Thermography (imaging) - NASA - Uncertainty analysis - Signal to noise ratio - Satellite imagery - Reflection
Uncontrolled terms:Effective approaches - Instrument performance - Medium resolution spectral imager - Moderate resolution imaging spectroradiometer - Remote-sensing reflectance - Satellite measurements - Satellite observations - Visible infrared imaging radiometer suites
Classification code:655.2 Satellites - 716.1 Information Theory and Signal Processing - 742.1 Photography - 913.3 Quality Assurance and Control - 922.1 Probability Theory - 944.7 Radiation Measuring Instruments
Numerical data indexing:Size 4.43e-07m
DOI:10.1109/TGRS.2021.3060781
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 365>
Accession number:20224012840724
Title:Simulations of the Radiative Lifetime in Surface Acoustic Wave driven Piezoelectric Semiconductor Devices
Authors:Pang, Ziliang (1, 2); Cao, Weiwei (1); Bai, YongLin (1)
Author affiliation:(1) Chinese Academy of Sciences, Key Laboratory of Ultra-Fast Photoelectric Diagnostics Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) The University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Bai, YongLin(baiyonglin@opt.ac.cn)
Source title:2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Abbreviated source title:Int. Conf. Electron. Packag. Technol., ICEPT
Part number:1 of 1
Issue title:2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665499057
Document type:Conference article (CA)
Conference name:23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Conference date:August 10, 2022 - August 13, 2022
Conference location:Dalian, China
Conference code:182631
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The traveling wave potential wells that are generated from a surface acoustic wave in the piezoelectric materials of semiconductor efficiently trap the created electron hole pairs, which is a potential method of the single-photon detectors. In this study, we report on a model that is used to study the correlation between radiative lifetime and periodical potential wells. We devised a Python program to numerically find the eigenstates in 1D periodical potential well system. The Schrödinger equation is solved to obtain electron and hole wave functions that are related to charge distribution. Then, we analyzed the impact of the potential well on the corresponding radiative lifetime of the system.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Particle beams
Controlled terms:Acoustic surface wave devices - Acoustic waves - Computer software - Photodetectors - Photons - Piezoelectricity - Semiconductor devices - Wave functions
Uncontrolled terms:Electron hole pairs - Piezoelectric - Piezoelectric semiconductors - Potential methods - Potential wells - Radiative lifetime - Single-photon detectors - Surface acoustic waves - Travelling waves - Wave potentials
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 723 Computer Software, Data Handling and Applications - 751.1 Acoustic Waves - 752.1 Acoustic Devices - 921 Mathematics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
DOI:10.1109/ICEPT56209.2022.9873441
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 366>
Accession number:20223712723129
Title:Rocket active drift measurement technology based on lidar
Title of translation:基于激光雷达的火箭主动漂移量测量技术
Authors:Shi, Heng (1, 2, 3); Gao, Xin (1); Li, Xiyu (1); Lei, Chengqiang (1); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1); Tang, Jia (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Scienses, Xi’an; 710119, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin0526@163.com)
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:20210636
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">In view of the problems existing in the current high-speed TV rendezvous measurement of rocket drift, such as the great influence of the external environment and the inability to obtain the measurement data in real time, an active measurement method of rocket takeoff real-time drift based on lidar is proposed. First, the lidar is installed on the two-dimensional precision turntable through the installation platform. In the process of rocket launch, the two-dimensional precision turntable drives the lidar to continuously track and scan the target point position of the rocket with high precision, and obtain the lidar point cloud data corresponding to the target point position. Then, the data processing system receives the lidar point cloud data, fits the elliptical curve and the elliptical curve center point of each frame data, takes the position of the elliptical center point when the rocket is stationary as the reference position, calculates the relative difference between the elliptical center point position of each frame data and the reference position, and determines the real-time drift of the rocket in the take-off stage. Finally, the measurement system and method are verified by the rocket launch test, and the test results show that under the condition of environmental interference, the measurement accuracy of real-time drift is 3.1 cm. It is the most accurate measurement method in the rocket drift measurement at present. At the same time, it can ensure the real-time performance of the data, provide real-time discrimination data for the rocket launch security console, and ensure the safety of the launch process.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:15
Main heading:Curve fitting
Controlled terms:Data handling - Digital storage - Optical radar - Rockets
Uncontrolled terms:Center points - Curves fittings - Dimensional precision - Measurement accuracy - Measurement methods - Real- time - Rocket drift - Rocket launch - Time drift - Two-dimensional
Classification code:654.1 Rockets and Missiles - 716.2 Radar Systems and Equipment - 722.1 Data Storage, Equipment and Techniques - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 921.6 Numerical Methods
Numerical data indexing:Size 3.10E-02m
DOI:10.3788/IRLA20210636
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 367>
Accession number:20214611167785
Title:A New Method for Direct Measurement of Polarization Characteristics of Water-Leaving Radiation
Authors:Liu, Jia (1); Jia, Xinyin (1); He, Xianqiang (2); Wang, Yihao (1); Zhu, Qiankun (1); Li, Haiwei (1); Zou, Chunbo (1); Chen, Tieqiao (1); Feng, Xiangpeng (1); Zhang, Geng (1); Li, Siyuan (1); Hu, Bingliang (1); Pan, Delu (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The polarization characteristics of water-leaving radiation, which contain rich information on oceanic constituents, have often been neglected. Due to the lack of suitable instruments and practical difficulties in removing strong contamination by polarized skylight, direct measurement of the polarization of water-leaving radiation remains a challenge. In this study, we designed an above-water instrument (named POLWR) to directly measure the polarization of water-leaving radiation and examined its field application in Qiandao Lake, China. Results showed that the Stokes components of water-leaving radiance ( L-{w} ) measured by POLWR were consistent with the radiative transfer (RT) simulations, with a determination coefficient ( R^{2} ) and mean relative error of 0.67 and 18.86%, respectively. The Qiandao Lake results revealed that the degree of polarization (DOP) of L-{w} varied from 0.05 to 0.5 within the 412-865-nm range. Moreover, a good relationship between the polarized remote sensing reflectance ( R-{\mathrm {rsp}} ), and DOP and chlorophyll-A (Chla) concentration was found at 368 nm in this productive lake, indicating great potential for the inversion of oceanic constituents from polarization signals. With its small size and direct measurement ability, the POLWR instrument should be widely applicable and could help improve our understanding of the polarization characteristics of water-leaving radiation and the underwater light field.<br/></div> © 1980-2012 IEEE.
Number of references:88
Main heading:Polarization
Controlled terms:Remote sensing - Lakes - Radiative transfer
Uncontrolled terms:Direct measurement - Extraterrestrial measurements - Field instruments - Measurements of - Polarization characteristics - Polarization-based algorithm - Pollution measurement - Radiative transfer simulations - Sea measurements - Water-leaving radiances
Classification code:701 Electricity and Magnetism
Numerical data indexing:Percentage 1.886E+01%, Percentage 6.70E-01%, Size 3.68E-07m, Size 8.65E-07m
DOI:10.1109/TGRS.2021.3126926
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 368>
Accession number:20222412229938
Title:Influence of exposure time on image reconstruction by lensless imaging technology
Authors:Yao, Xiaopeng (1, 2); Liu, Muyuan (1, 2); Su, Xiuqin (1, 3); Zhu, Wenhua (1, 2, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:2022 7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Abbreviated source title:Int. Conf. Intell. Comput. Signal Process., ICSP
Part number:1 of 1
Issue title:2022 7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Issue date:2022
Publication year:2022
Pages:1978-1981
Language:English
ISBN-13:9781665478571
Document type:Conference article (CA)
Conference name:7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Conference date:April 15, 2022 - April 17, 2022
Conference location:Xi'an, China
Conference code:179503
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The quality of the reconstructed image from lensless imaging is affected by the exposure time. This paper explores the influence of exposure time on imaging technology. Based on the lensless imaging system established by us, we compare and analyze the objective evaluation indexes of reconstructed images under different exposure times, which proves that our lensless imaging system is suitable for all-weather application fields.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Image reconstruction
Controlled terms:Imaging systems
Uncontrolled terms:Application fields - Compare and analyze - Evaluation index - Exposure-time - Images reconstruction - Imaging technology - Lens-less imaging - Lensless - Objective evaluation - Reconstructed image
Classification code:746 Imaging Techniques
DOI:10.1109/ICSP54964.2022.9778316
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:ACKNOWLEDGMENT Authors would like to thank the strategic high-tech innovation fund of CAS for its support.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 369>
Accession number:20224413023815
Title:Quantitative atmospheric phase jitter simulating research of optic field imaging (Open Access)
Authors:Cheng, Zhiyuan (1); Li, Zhiguo (1); Ji, Zhou (2); Yan, Peipei (1); Xia, Aili (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechnics of Chinese Academy of Science, Cas Key Laboratory of Space Precision Measurement Technology, China; (2) Unversity of Chinese Academy of Sciences, China; (3) Xi'an Institute of Optics and Precision Mechnics of Chinese Academy of Science, China
Corresponding author:Cheng, Zhiyuan(czy@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:Proceedings of 2022 2nd International Conference on Control and Intelligent Robotics, ICCIR 2022
Issue date:June 24, 2022
Publication year:2022
Pages:231-234
Language:English
ISBN-13:9781450397179
Document type:Conference article (CA)
Conference name:2nd International Conference on Control and Intelligent Robotics, ICCIR 2022
Conference date:June 24, 2022 - June 26, 2022
Conference location:Virtual, Online, China
Conference code:183400
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">The laser field imaging telescope emits laser coherent field to detect space targets. When laser passes through the atmospheric transmission path, the laser is inevitably affected by the phase jitter of atmosphere. Atmospheric phase jitter varies randomly and it is difficult to be quantitatively simulated. In order to quantitatively research the influence of atmospheric phase jitter on imaging quality, a quantitative simulation method of atmospheric phase jitter based on the change of beam frequency difference was proposed. A set of atmospheric turbulence phase jitter quantitative numerical simulation experimental platform was constructed. The effect of different phase jitter on the imaging quality of laser field imaging was quantitatively studied. The results show that the larger the atmospheric phase jitter is, the more degraded the image quality is. We suggest that the atmospheric phase jitter should be suppressed in the signal reconstruction. The quantitative simulation method of atmospheric phase jitter provides an effective technique for studying the image quality of light field imaging.<br/></div> © 2022 ACM.
Number of references:8
Main heading:Atmospheric turbulence
Controlled terms:Jitter - Signal reconstruction - Simulation platform
Uncontrolled terms:Atmospheric phase jitter - Coherent fields - Field imaging - Imaging quality - Laser field imaging - Laser fields - Optic fields - Quantitative simulating experiment - Quantitative simulation - Simulating experiments
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 723.5 Computer Applications
DOI:10.1145/3548608.3559198
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China Grant No: 61875257 and the Natural Science Foundation of Shaanxi Province China Grant No: 2017JM6035. The research was also supported by the Open Resaech Fund of CAS Key Laboratory of Space Precision Measurement Technology Grant No: CXJJ-21S042.The author would like to thank Zhang Yu for technical support.The work was supported by Natural Science Foundation of China (Grant No: 61875257)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 370>
Accession number:20224813183598
Title:Fluid-Thermal Interaction Simulation of a Hypersonic Aircraft Optical Dome (Open Access)
Authors:Wang, Zhiqiang (1); Zhang, Anjing (2); Pan, Jia (1); Lu, Weiguo (1); Sun, Yubiao (3)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of Cas, Xi’an; 710119, China; (2) School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an; 710072, China; (3) Engineering Department, University of Cambridge, Trumpington Street, Cambridge; CB2 1PZ, United Kingdom
Corresponding authors:Wang, Zhiqiang(wangzhiqiang@opt.ac.cn); Sun, Yubiao(ys572@cam.ac.uk)
Source title:Energies
Abbreviated source title:Energies
Volume:15
Issue:22
Issue date:November 2022
Publication year:2022
Article number:8619
Language:English
E-ISSN:19961073
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Hypersonic aircraft design is an enabling technology. However, many problems are encountered, including the design of the hood. The aircraft optical dome can become heated due to aerodynamic effects. Since the optical dome of a hypersonic aircraft should satisfy optical imaging requirements, a conventional ablative coating cannot be adopted. The aerodynamic heating characteristics during the whole flight must be studied. In this study, a numerical simulation method for the aerodynamic heat of hypersonic aircraft under long-term variable working conditions is proposed. In addition, the numerical simulation of the external flow field and structure coupling of the aerodynamic heat problem is performed. The dynamic parameters of temperature and pressure are obtained, and the thermal protection basis of the internal equipment is obtained. Numerical results indicate that the average temperature and maximum temperature of the optical dome for inner and outer walls exhibit an "M" shape with time, with two high-temperature cusps and one low-temperature cusp. The time of average temperature coincides with that of maximum wall temperature. During the flight, the wall pressure changes with time, exhibiting the characteristics of higher temperature at both ends of the flight and lower temperature in the middle. The structural temperature of the hypersonic aircraft is higher than that of the external flow behind the shock wave after 310 s. Therefore, this study provides a reliable reference for the preliminary design and parameter research of optical domes of hypersonic aircraft.<br/></div> © 2022 by the authors.
Number of references:20
Main heading:Temperature
Controlled terms:Aerodynamic heating - Domes - Hypersonic aerodynamics - Hypersonic flow - Hypersonic vehicles - Numerical methods - Numerical models - Shock waves
Uncontrolled terms:Aerodynamic effect - Aircraft design - Enabling technologies - Fluid-thermal simulation - Highest temperature - Interaction simulations - Lows-temperatures - Optical domes - Thermal interaction - Thermal simulations
Classification code:408.2 Structural Members and Shapes - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 651.1 Aerodynamics, General - 652.1 Aircraft, General - 655.1 Spacecraft, General - 921 Mathematics - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Time 3.10E+02s
DOI:10.3390/en15228619
Funding details: Number: E229321201, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:This research was funded by Youth Innovation Promotion Association, XIOPM, CAS (no. E229321201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 371>
Accession number:20224513074945
Title:Stray Light Characteristics and Suppression in Space-borne Doppler Asymmetric Spatial Heterodyne Interferometer
Title of translation:星载多普勒差分干涉仪杂散光特性与抑制
Authors:Li, Junjie (1, 2); Sun, Jian (1); Zhao, Hengxiang (1); Chang, Chenguang (1, 2); Fu, Di (1, 2); Zhao, Hao (1); Bai, Lu (3); Feng, Yutao (1)
Author affiliation:(1) Xi′an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi′an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Optoelectronic Engineering, Xidian University, Xi′an; 710071, China
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1130002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Wind detection in middle and upper atmosphere is an important way to characterize atmospheric environment and atmospheric dynamics， which is significant for accurate weather forecast and smooth operation of aerospace missions. Satellite remote sensing of the atmospheric wind field is not limited by weather and geographical conditions， and can be used for global all-weather remote sensing observation. More importantly， using limb viewing geometry can provide long-term observation results of the global horizontal wind field and temperature distribution， which is necessary for studying large-scale and long-term space climate. Compared with Michelson interferometer and Fabry-Perot interferometer， the Doppler asymmetric spatial heterodyne interferometer has higher sensitivity， no moving parts and lower processing accuracy requirements. These advantages can greatly improve the performance of the system， and are very suitable for wind field detection activities in the middle and upper atmosphere. The space-borne wind interferometer is designed to detect the weak airglow emissions employing limb viewing geometry， which can be easily affected by background radiation from the lower atmosphere. The earth's atmosphere is composed of a variety of gases and aerosol particles. These components enable the atmosphere to absorb and scatter the incident solar radiation， which constitutes the atmospheric background radiation. The stray light will degrade the quality of the original interferogram data， decreasing the contrast and effective signal-to-noise ratio. This paper uses a satellite based on 500 km orbital altitude to measure the winds in the middle atmosphere at the height of 60~90 km， and the typical atmospheric background radiation and airglow radiation intensity are selected. The detection range of the above loads is in the upper atmosphere， and the observation of wind field in the middle atmosphere （60~90 km） will put forward higher requirements for the suppression of stray light. In addition， the multistage diffraction energy of Doppler interferometer should be analyzed. According to the atmospheric background radiation intensity at different altitudes， combined with the optical system parameters， the baffle is designed. The primary purpose of the baffle is the suppression of signal that originates from angles outside the field of view since the illuminated earth’s disk and the sun represent light sources that are many orders of magnitude brighter than the targeted airglow emissions， and during the day， the bright earth is always close to the fields of view. The adopted criterion is that the entrance aperture in front of the first lens should not receive light directly from the sunlit cloud tops， which is assumed to be 20 km altitude. In order to suppress the stray light in the field of view， the optical system is simulated to find the key surfaces which can cause the ghost image in the interferometer and the suppression structure is made. For the stray light of the interferometer multistage diffraction， simulation of rays tracing is taken to evaluate the influence on imaging. In order to evaluate the stray light suppression effect， point source transmittance analysis and illumination simulation are taken. The point source transmittance is the ratio of the illuminance at the image surface to the illuminance at the entrance pupil. The image surface illuminance map is obtained by simulating the airglow light source and the atmospheric background radiation light source. Through point source transmittance analysis and illumination simulation， the following conclusions are obtained. First， in the horizontal and diagonal directions， the point source transmittance drops below 10<sup>-5</sup> at 0.2° outside the field of view， and in the vertical direction， the point source transmittance drops below 10<sup>-5</sup> at 0.04° outside the field of view. Second， the atmospheric background radiation and ghost image account for 1.35% of the total energy of the image. The results show that the proposed stray light suppression method is effective and meets the requirements of the satellite-borne Doppler asymmetric spatial heterodyne interferometer.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:19
Main heading:Stray light
Controlled terms:Fabry-Perot interferometers - Infrared radiation - Light sources - Michelson interferometers - Optical remote sensing - Optical systems - Orbits - Signal to noise ratio
Uncontrolled terms:Applied optics - Atmospheric background radiation - Background radiation - Baffle design - Dopple asymmetric spatial heterodyne interferometer - Doppler - Field of views - Heterodyne interferometer - Spatial heterodyne - Stray light suppression
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Percentage 1.35E+00%, Size 2.00E+04m, Size 5.00E+05m, Size 6.00E+04m to 9.00E+04m
DOI:10.3788/gzxb20225111.1130002
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E1294301, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 41005019）， West Light Foundation of the Chinese Academy of Sciences （No. XAB 2016A07）， Natural Science Basic Research Program of Shaanxi Province （No. 2019JQ-931）， West Light Cross-Disciplinary Innovation Team of Chinese Academy of Sciences （No. E1294301）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 372>
Accession number:20231113697428
Title:Active Tuning and Anisotropic Strong Coupling of Terahertz Polaritons in Van der Waals Heterostructures (Open Access)
Authors:Li, Shaopeng (1, 2); Xu, Junhao (1); Xie, Yajie (1)
Author affiliation:(1) Department of Physics, Shaanxi University of Science and Technology, Xi’an; 710021, China; (2) State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Corresponding author:Li, Shaopeng(lishaopeng@sust.edu.cn)
Source title:Micromachines
Abbreviated source title:Micromachines
Volume:13
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1955
Language:English
E-ISSN:2072666X
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Electromagnetic field confinement is significant in enhancing light-matter interactions as well as in reducing footprints of photonic devices especially in Terahertz (THz). Polaritons offer a promising platform for the manipulation of light at the deep sub-wavelength scale. However, traditional THz polariton materials lack active tuning and anisotropic propagation simultaneously. In this paper, we design a graphene/α-MoO<inf>3</inf> heterostructure and simulate polariton hybridization between isotropic graphene plasmon polaritons and anisotropic α-MoO<inf>3</inf> phonon polaritons. The physical fundamentals for polariton hybridizations depend on the evanescent fields coupling originating from the constituent materials as well as the phase match condition, which can be severely affected by the α-MoO<inf>3</inf> thickness and actively tuned by the gate voltages. Hybrid polaritons propagate with in-plane anisotropy that exhibit momentum dispersion characterized by elliptical, hyperboloidal and even flattened iso-frequency contours (IFCs) in the THz range. Our results provide a tunable and flexible anisotropic polariton platform for THz sensing, imaging, and modulation.<br/></div> © 2022 by the authors.
Number of references:26
Main heading:Polariton
Controlled terms:Anisotropy - Dispersion (waves) - Evanescent fields - Graphene - Phonons - Photonic devices - Photons - Van der Waals forces
Uncontrolled terms:Active tuning - Anisotropic propagation - Dispersion engineering - Hybridisation - Light-matter interactions - Polariton hybridization - Polaritons - Strong-coupling - Tera Hertz - Van der Waal
Classification code:701 Electricity and Magnetism - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 801.4 Physical Chemistry - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.3390/mi13111955
Funding details: Number: 62005151, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was funded by the National Natural Science Foundation of China (NSFC), grant number 62005151.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 373>
Accession number:20214911260464
Title:Abnormal event detection by a weakly supervised temporal attention network (Open Access)
Authors:Zheng, Xiangtao (1); Zhang, Yichao (1, 2); Zheng, Yunpeng (1, 2); Luo, Fulin (3); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:CAAI Transactions on Intelligence Technology
Abbreviated source title:CAAI Trans. Intell. Technol.
Volume:7
Issue:3
Issue date:September 2022
Publication year:2022
Pages:419-431
Language:English
ISSN:24686557
E-ISSN:24682322
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Abnormal event detection aims to automatically identify unusual events that do not comply with expectation. Recently, many methods have been proposed to obtain the temporal locations of abnormal events under various determined thresholds. However, the specific categories of abnormal events are mostly neglect, which are important to help in monitoring agents to make decisions. In this study, a Temporal Attention Network (TANet) is proposed to capture both the specific categories and temporal locations of abnormal events in a weakly supervised manner. The TANet learns the anomaly score and specific category for each video segment with only video-level abnormal event labels. An event recognition module is exploited to predict the event scores for each video segment while a temporal attention module is proposed to learn a temporal attention value. Finally, to learn anomaly scores and specific categories, three constraints are considered: event category constraint, event separation constraint and temporal smoothness constraint. Experiments on the University of Central Florida Crime dataset demonstrate the effectiveness of the proposed method.<br/></div> © 2021 The Authors. CAAI Transactions on Intelligence Technology published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology and Chongqing University of Technology.
Number of references:51
Main heading:Image segmentation
Uncontrolled terms:Abnormal event detections - Event recognition - Human detection - Learn+ - Monitoring agents - Separation constraints - Smoothness constraints - University of Central Florida - Video analysis - Video segments
DOI:10.1049/cit2.12068
Funding details: Number: 2020KJXX‐091, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDY‐SSW‐JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under grant no. 61925112, in part by the National Natural Science Foundation of China under grant no. 61806193 and grant no. 61772510, in part by the Innovation Capability Support Program of Shaanxi under grant no. 2020KJXX‐091, and in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences under grant no. QYZDY‐SSW‐JSC044.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 374>
Accession number:20224613098875
Title:All-optical sampling of ultrashort laser pulses based on perturbed transient grating
Authors:Huang, Pei (1); Yuan, Hao (1, 2); Cao, Huabao (1, 2); Wang, Hushan (1, 2); Wang, Xianglin (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Fu, Yuxi (1, 2)
Author affiliation:(1) Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Fu, Yuxi(fuyuxi@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:20
Issue date:October 15, 2022
Publication year:2022
Pages:5369-5372
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We propose and demonstrate an all-optical pulse sampling technique based on the transient grating (TG) procedure with perturbation, which provides a simple and robust manner to characterize an ultrashort laser pulse without employing a retrieval algorithm. In our approach, a two-orders weaker perturbation pulse perturbs the diffracted pulse from the TG, which is generated by another strong fundamental pulse. The modulation of the diffracted pulse energy directly represents the temporal profile of the perturbation pulse. We have successfully characterized few-cycle and multi-cycle pulses, which is consistent with the results verified by the widely employed frequency-resolved optical gating (FROG) method. Our method provides a potential way to characterize ultrashort laser waveform from the deep-UV to far-infrared region.<br/></div> © 2022 Optica Publishing Group.
Number of references:27
Main heading:Ultrashort pulses
Controlled terms:Signal sampling
Uncontrolled terms:All optical - All-optical sampling - Fundamental pulse - Pulse energies - Retrieval algorithms - Sampling technique - Simple++ - Temporal profile - Transient grating - Weak perturbation
Classification code:723.2 Data Processing and Image Processing - 922 Statistical Methods
DOI:10.1364/OL.473294
Funding details: Number: J20-021-III,J21-029-III, Acronym: -, Sponsor: -;Number: S19-020-III, Acronym: -, Sponsor: -;Number: 202005YK01, Acronym: -, Sponsor: -;Number: 12104501,61690222,62175256,92050107, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J22-083-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: WCH2021002, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China (12104501, 61690222, 62175256, 92050107); Youth Innovation Promotion Association XIOPM-CAS (WCH2021002); Natural Science Basic Research Program of Shaanxi Province (2019JCW-03); Pioneer Initiative Project of CAS (J22-083-III); Innovation Team in Shaanxi Province (J21-029-III); Major Science and Technology Infrastructure Pre-Research Program of the CAS (J20-021-III); Science and Technology Program of Xi’an (202005YK01); Key Deployment Research Program of XIOPM (S19-020-III). We acknowledge Prof. Liang-Wen Pi from XIOPM for beneficial discussions.Funding. National Natural Science Foundation of China (12104501, 61690222, 62175256, 92050107); Youth Innovation Promotion Association XIOPM-CAS (WCH2021002); Natural Science Basic Research Program of Shaanxi Province (2019JCW-03); Pioneer Initiative project of CAS (J22-083-III); Innovation team in Shaanxi Province (J21-029-III); Major Science and Technology Infrastructure Pre-research Program of the CAS (J20-021-III); Science and Technology Program of Xi’an (202005YK01); Key Deployment Research Program of XIOPM (S19-020-III).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 375>
Accession number:20223212542425
Title:Second-harmonic generation in a high-index doped silica micro-ring resonator
Authors:Li, Yuhua (1, 2); Wang, Shao Hao (3); Ho, Wai Lok (2); Zhu, Xiaotian (2); Wang, Xiang (4); Davidson, Roy R. (4); Little, Brent E. (5); Chen, Rui-Pin (1); Chu, Sai Tak (2)
Author affiliation:(1) Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou; 310018, China; (2) Department of Physics, City University of Hong Kong, Kowloon Tong, 999077, Hong Kong; (3) Department of Microelectronics Science and Technology, Fuzhou University, Qi Shan Campus, Fuzhou; 350108, China; (4) QXP Technology, Xi'an; 710311, China; (5) State Key Laboratory of Transient Optics and Photonics, XIOPM, CAS, Xi'an; 710119, China
Corresponding author:Chu, Sai Tak(saitchu@cityu.edu.hk)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:15
Issue date:August 1, 2022
Publication year:2022
Pages:3884-3887
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We report the first, to the best of our knowledge, observation of second-harmonic generation (SHG) in a high-index doped silica micro-ring resonator, due to the symmetry-breakinginduced χ(2) at the core and cladding interface of the waveguide. The generated SH power is shown to have quadratic dependence on the in-cavity power of the fundamental pump at around 1550 nm. The pumping wavelength sweep method is adopted to fulfill the phase-matching condition for maximum conversion efficiency of SHG. This work offers a new approach to generate a visible source for the visible-light integrated optical platform from infrared-visible light conversion.<br/></div> © 2022 Optica Publishing Group.
Number of references:29
Main heading:Harmonic generation
Controlled terms:Conversion efficiency - Light - Optical frequency conversion - Optical resonators - Phase matching - Silica
Uncontrolled terms:1550 nm - Cladding interfaces - Core interfaces - Doped silicas - Higher index - Microring Resonator (MRR) - Power - Pumping wavelength - Quadratic dependence - Visible light
Classification code:525.5 Energy Conversion Issues - 713 Electronic Circuits - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.55E-06m
DOI:10.1364/OL.463317
Funding details: Number: SRG-Fd 7005599, Acronym: -, Sponsor: City University of Hong Kong;Number: 11874323,62105291, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11430131282104, Acronym: ZSTU, Sponsor: Zhejiang Sci-Tech University;
Funding text:Funding. National Natural Science Foundation of China (62105291, 11874323); Zhejiang Sci-Tech University (11430131282104); City University of Hong Kong (SRG-Fd 7005599).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 376>
Accession number:20223712717629
Title:Study on multi-beam laser coherent imaging system
Authors:Liu, Hui (1, 2, 3); Gao, Xin (4); Luo, Xiu-Juan (1, 3); Zhang, Yu (1, 2, 3); Chen, Ming-Lai (1, 2, 3); Yue, Ze-Lin (2, 3)
Author affiliation:(1) Xìan Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Cas Key Laboratory of Space Precision Measurement Techlolgy, Xian, China; (4) Key-Laboratory of Space Object Measurement, Beijing Institute of Tracking and Telecommunications Technology, Beijing, China
Corresponding author:Gao, Xin(gaoxin526@sina.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12307
Part number:1 of 1
Issue title:Second Optics Frontier Conference
Issue date:2022
Publication year:2022
Article number:123070H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510656765
Document type:Conference article (CA)
Conference name:2nd Optics Frontier Conference
Conference date:May 23, 2022 - May 27, 2022
Conference location:Virtual, Online
Conference code:182271
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Coherent imaging with multi-beam laser is considered as a key technique in ground based imaging. In the paper, the composition of multi-beam laser coherent imaging system is demonstrated in detail, the constraints between subsystem parameters are analyzed, and the array layout of multi-beam laser imaging transmitter is proposed. In the system, the laser aiming accuracy has an important impact on the imaging. The theoretical simulation indicates that the aiming error of the emitter array should be controlled within 5%. Finally, Design equivalent aperture as φ1.5m experimental system and Imaging target successfully, verifying the correctness and feasibility of the system, and promoting the implementation of multi-beams coherent imaging technology.<br/></div> © 2022 SPIE.
Number of references:12
Main heading:Imaging systems
Uncontrolled terms:Array layout - Coherent imaging - Coherent imaging systems - Ground based - High-resolution imaging - Laser coherent imaging - Laser imaging - Multibeams - Pointing errors - T array
Classification code:746 Imaging Techniques
Numerical data indexing:Percentage 5.00E+00%
DOI:10.1117/12.2644089
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 377>
Accession number:20220449368
Title:Spectral Beam Combing of Fiber Lasers with 32 Channels
Authors:Gao, Qi (1, 2); Li, Zhe (1, 2); Zhao, Wei (1); Li, Gang (1, 2); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi’an Aeronautical University, Xi’an; 710077, China
Corresponding author:Gao, Qi
Source title:SSRN
Issue date:December 1, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method for spectral combination of fiber lasers with extremely high spectral density, increasing spectral density utilization with no degradation in beam quality, and decreasing the single channel narrow linewidth output power. Experiments demonstrating the utility of our method are described. The results show that we achieve 32 channels fiber laser spectral beam combining (SBC) with a beam quality of M2 =1.68. The beam quality of SBC can be optimized constantly by varying the spectral interval integrally with the feedback system. Our method is potentially scalable to many 100’s of channels and achieves tens or hundreds of kW output power with an excellent beam quality.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Fiber lasers
Controlled terms:Fibers - Spectral density
Uncontrolled terms:Beams quality - Feedback systems - Narrow-line width - Output power - Single channels - Spectral beam combing - Spectral beam combining - Spectral beams - Spectral combination - Superfluorescent source
Classification code:744.4 Solid State Lasers
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4291145
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 378>
Accession number:20220811698622
Title:Advances in Silica-Based Large Mode Area and Polarization-Maintaining Photonic Crystal Fiber Research (Open Access)
Authors:Ma, Yuan (1, 2); Wan, Rui (1, 2); Li, Shengwu (1, 2); Yang, Liqing (1); Wang, Pengfei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Materials
Abbreviated source title:Mater.
Volume:15
Issue:4
Issue date:February-2 2022
Publication year:2022
Article number:1558
Language:English
E-ISSN:19961944
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, photonic crystal fibers (PCFs) have attracted increasing attention. Compared with traditional optical fibers, PCFs exhibit many unique optical properties and superior performance due to their high degree of structural design freedom. Using large-mode area (LMA) fibers with single-mode operation is essential to overcoming emerging problems as the power of fiber lasers scales up, which can effectively reduce the power density and mitigate the influence of nonlinear effects. With a brief introduction of the concept, classification, light transmission mechanism, basic properties, and theoretical analysis methods of PCFs, this paper mainly compiles the worldwide development of large-mode area and polarization-maintaining (PM) PCFs, and finally proposes possible technical routes to realize the single-mode operation of LMA-PCFs and PM-LMA-PCFs. Finally, the future development prospects of the PCFs are discussed.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:93
Main heading:Photonic crystal fibers
Controlled terms:Nonlinear optics - Polarization - Structural design - Polarization-maintaining fiber - Silica - Fiber lasers - Light transmission - Optical properties - Crystal whiskers
Uncontrolled terms:Design freedom - High power fibre laser - Large mode area - Large-mode-area photonic crystal fibers - Microstructures fibers - Performance - Photonic-crystal fiber - Polarization maintaining - Polarization-maintaining photonic crystal fiber - Single mode operation
Classification code:408.1 Structural Design, General - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 744.4 Solid State Lasers - 933.1.1 Crystal Lattice - 951 Materials Science
DOI:10.3390/ma15041558
Funding details: Number: 2017446, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This research was funded by Shaanxi Provincial Key Research and Development Program (grant number 2021GY-251) and Youth Innovation Promotion Association, CAS (grant number 2017446).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 379>
Accession number:20224413019080
Title:Design and testing of the structure of the eXTP optics
Authors:Song, Z.Y. (1); Ma, J. (1); Wang, J. (1); Zhang, A.M. (1); Wang, Y.S. (1); Yang, Y.J. (1); Jiang, W.C. (1); Chen, Y. (1); Yu, K. (1); Yang, S. (1); Xu, Y.P. (1); He, H.L. (1); Lu, F.J. (1); Zhang, S.N. (1); Basso, S. (2); Civitani, M. (2); Pareschi, G. (2); Sironi, G. (2); Spiga, D. (2); Cotroneo, V. (2); Tagliaferri, G. (2); Sheng, L.Z. (3); Yan, Y.Q. (3); Qiang, P.F. (3); Zhao, B.S. (3)
Author affiliation:(1) IHEP, Institute of High Energy Physics, CAS, 19B Yuquan Road, Beijing; 100049, China; (2) INAF-Brera Astronomical Observatory, Via E. Bianchi 46, Merate; 23807, Italy; (3) XIOPM, Xi’an Institute of Optics and Precision Mechanics, CAS, 17 Xinxi Road, Xi’an; 710119, China
Corresponding author:Song, Z.Y.(songzy@ihep.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12181
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Issue date:2022
Publication year:2022
Article number:121816C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653436
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, United states
Conference code:183051
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The abbreviation "eXTP" represents the enhanced X-ray timing and polarimetry, which is a key science mission initiated by the Chinese scientists, designed to study the state of matter under extreme conditions of density, gravity and magnetism [1]. Various payloads would be on board of the satellite. The SFA, namely the Spectroscopy Focusing Array, consisting of 9 identical X-ray telescopes working in the energy range of 0.5-10 keV, will be the focus here [1]. SFA has a field-of-view of 12 arcmin for each and a collecting area of 900 cm<sup>2</sup> and 550 cm<sup>2</sup> for each at 2 keV and 6 keV respectively [1]. This paper starts with a brief introduction of the general optics, and then goes across some important design aspects. It covers contents from the structural and thermal designs to the CAE analyses as well as the current status. The large diameter and huge focal length of the optics will definitely bring big issues to the robustness of the carrying structure under the severe conditions given by the launcher. According to the current design, the mirror assembly will have 3 feet and 24 spokes. Vibration tests were already performed on a few prototypes by IHEP, and a preliminary evaluation on the feasibility of the design has been achieved. It clearly stated that the current design with only a single spider can probably survive the vibration tests assuming a compromised test condition somewhere. CAE models were adjusted thereafter to match the test results, which could be used for further assessments in a near future. Of course, there are always uncertainties associated with our arguments. More detailed prototypes with mechanically fully representative shells were still under design. Hopefully, highly reliable results could be retrieved soon.<br/></div> © 2022 SPIE. All rights reserved.
Number of references:7
Main heading:Vibration analysis
Controlled terms:Gravitation - Space telescopes - Structural design
Uncontrolled terms:'current - Analyse - Energy ranges - EXTP - Extreme conditions - Science missions - States of matter - Structure design - Vibration test - X ray telescope
Classification code:408.1 Structural Design, General - 741.3 Optical Devices and Systems - 931.5 Gravitation, Relativity and String Theory
Numerical data indexing:Electron volt 2.00E+03eV, Electron volt 5.00E+02eV to 1.00E+04eV, Electron volt 6.00E+03eV, Size 5.50E+00m, Size 9.00E+00m, Size 9.15E-01m
DOI:10.1117/12.2629781
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 380>
Accession number:20224012831194
Title:Fast non-line-of-sight imaging based on product-convolution expansions
Authors:Xu, Weihao (1, 2); Chen, Songmao (1, 3); Tian, Yuyuan (1, 2); Wang, Dingjie (1, 2); Su, Xiuqin (1, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:18
Issue date:September 15, 2022
Publication year:2022
Pages:4680-4683
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Non-line-of-sight (NLoS) imaging reveals a hidden scene using indirect diffuse reflections. A common choice for analyzing the time-of-flight (ToF) data from a non-confocal system is an ellipsoid model whose operator is high-dimensional, leading to a computationally arduous task. In this Letter, the product-convolution expansions method is utilized to formulate the operator and its adjoint based on the observation of a shift-variant point spread function (PSF) in the ToF data. The operator and its adjoint are locally approximated as a convolution, which allows the forward and backward procedure to be computed efficiently through fast Fourier transform (FFT). Moreover, the low-rank approximation of the operator is obtained by matrix decompositions, further improving the computational efficiency. The proposed method is validated using publicly accessible datasets.<br/></div> © 2022 Optica Publishing Group.
Number of references:20
Main heading:Convolution
Controlled terms:Approximation theory - Computational efficiency - Fast Fourier transforms - Optical transfer function
Uncontrolled terms:Adjoints - Diffuse reflection - Expansion methods - Forward-and-backward - High-dimensional - Higher-dimensional - Low rank approximations - Non-line-of-sight imaging - Shift variant point spread function - Time-of-flight data
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.1364/OL.469719
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:Funding. Strategic High Technology Innovation Project of the Chinese Academy of Sciences (Xiuqin Su); China Postdoctoral Science Foundation (Songmao Chen).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 381>
Accession number:20214211038001
Title:Generalized Scene Classification From Small-Scale Datasets With Multitask Learning
Authors:Zheng, Xiangtao (1); Gong, Tengfei (2, 3); Li, Xiaobin (4); Lu, Xiaoqiang (5)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Beijing Institute of Remote Sensing Information, Beijing; 100192, China; (5) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing images contain a wealth of spatial information. Efficient scene classification is a necessary precedent step for further application. Despite the great practical value, the mainstream methods using deep convolutional neural networks (CNNs) are generally pretrained on other large datasets (such as ImageNet) and thus fail to capture the specific visual characteristics of remote sensing images. For another, it lacks the generalization ability to new tasks when training a new CNN from scratch with an existing remote sensing dataset. This article addresses the dilemma and uses multiple small-scale datasets to learn a generalized model for efficient scene classification. Since the existing datasets are heterogeneous and cannot be directly combined to train a network, a multitask learning network (MTLN) is developed. The MTLN treats each small-scale dataset as an individual task and uses complementary information contained in multiple tasks to improve generalization. Concretely, the MTLN consists of a shared branch for all tasks and multiple task-specific branches with each for one task. The shared branch extracts shared features for all tasks to achieve information sharing among tasks. The task-specific branch distills the shared features into task-specific features toward the optimal estimation of each specific task. By jointly learning shared features and task-specific features, the MTLN maintains both generalization and discrimination abilities. Two types of MTL scenarios are explored to validate the effectiveness of the proposed method: one is to complete multiple scene classification tasks and the other is to jointly perform scene classification and semantic segmentation.<br/></div> 1558-0644 © 2021 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See https://www.ieee.org/publications/rights/index.html for more information.
Number of references:48
Main heading:Semantics
Controlled terms:Learning systems - Remote sensing - Semantic Segmentation - Classification (of information) - Convolution - Large dataset - Computer vision - Convolutional neural networks - Deep neural networks - Semantic Web
Uncontrolled terms:Attention - Convolutional neural network - Features extraction - Multitask learning - Remote sensing images - Remote-sensing - Scene classification - Small scale - Small-scale dataset. - Task analysis
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.5 Computer Applications - 741.2 Vision - 903 Information Science - 903.1 Information Sources and Analysis
DOI:10.1109/TGRS.2021.3116147
Funding details: Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 10.13039/501100014219, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 382>
Accession number:20230413449647
Title:Camera Design and Performance for the Earth 2.0 Mission
Authors:Song, Zongxi (1); Li, Wei (1); Wang, Fengtao (1); Cheng, Pengfei (1); Shen, Chao (1); Pan, Yue (1); Gao, Wei (1); Li, Yan (2); Zhang, Hui (2); Ge, Jian (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) Shanghai Astronomical Observatory, Chinese Academy of Sciences, China
Corresponding author:Gao, Wei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:121804B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and free-floating planets. The six 30 cm diameter transit telescopes will be equipped with a CMOS camera which consists of 4（2×2）9K×9K CMOS sensors. A prototype camera with a 8900×9120 pixel GSENSE 1081 BSI type CMOS sensor and temperature control is designed and developed for high precision photometry measurements. In this paper, details of this camera design and performance test results are reported.<br/></div> © 2022 SPIE.
Number of references:13
Main heading:Earth (planet)
Controlled terms:Cameras - CMOS integrated circuits - Integrated circuit design - Orbits - Photometry - Space telescopes
Uncontrolled terms:Camera design - CMOS - CMOS sensors - High precision photometry - High-precision - Performance - Prototype - Space missions - Terrestrial planets - Transit telescope
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 941.4 Optical Variables Measurements
Numerical data indexing:Size 3.00E-01m, Temperature 9.00E+00K, Time 2.00E+00s
DOI:10.1117/12.2630652
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600. We thank Baopeng Li and Yingdian Li for their help in image acquisition, dataprocessingand analysis.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 383>
Accession number:20222312201903
Title:Structure design of the shutter with slider-crank mechanism (Open Access)
Authors:Jiaqi, F.E.I. (1)
Author affiliation:(1) Laboratory of Aircraft Optical Imaging Monitoring and Measurement Technology, Xi'An Institute of Optics and Precision Mechanics of CAS, China
Corresponding author:Jiaqi, F.E.I.(feijiaqi@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICMIP 2022 - Proceedings of 2022 7th International Conference on Multimedia and Image Processing
Issue date:January 14, 2022
Publication year:2022
Pages:118-123
Language:English
ISBN-13:9781450387408
Document type:Conference article (CA)
Conference name:7th International Conference on Multimedia and Image Processing, ICMIP 2022
Conference date:January 14, 2022 - January 16, 2022
Conference location:Virtual, Online, China
Conference code:179483
Sponsor:Tianjin University of Technology and Education
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">In order to realize the miniaturization and lightweight of the infrared nonuniform correction shutter, the crank slider mechanism is used to design. Firstly, the shutter blade is used as the slider and the driving mechanism is used as the crank, and the motion analysis is carried out. The transmission angle of the crank slider mechanism is calculated to be no less than 66.42 °. Then, the slider, connecting rod and crank are analyzed respectively, the force system and motion equation are established, and the driving torque of the shutter is calculated. The design results show that the volume, weight and driving torque of the same target product are reduced by 1 / 3, 1 / 2 and 1 / 2, respectively, compared with the direct motion rotary shutter commonly used in nonuniform correction of infrared camera. The design goal is achieved.<br/></div> © 2022 Owner/Author.
Number of references:11
Main heading:Infrared imaging
Controlled terms:Equations of motion - Machine design - Mechanisms - Product design
Uncontrolled terms:Crank slider mechanisms - Driving mechanism - Driving torques - IR-imaging - Mechanical shutters - Miniaturisation - Nonuniformity correction - Power calculation - Slider-crank mechanism - Structure design
Classification code:601 Mechanical Design - 601.3 Mechanisms - 746 Imaging Techniques - 913.1 Production Engineering - 921.2 Calculus
DOI:10.1145/3517077.3517119
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 384>
Accession number:20220449283
Title:10-W Random Fiber Laser Based on Er/Yb Co-Doped Fiber
Authors:Li, Zhe (1, 2); Gao, Qi (1, 2); Li, Gang (1, 2); She, Shengfei (1, 2); Sun, Chuandong (1); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi’an Aeronautical University, Xi’an; 710077, China
Corresponding authors:Li, Gang(ligang85@opt.ac.cn); Sun, Chuandong(scd@opt.ac.cn)
Source title:SSRN
Issue date:December 1, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, we presented a 1550 nm, high-power, high-efficiency random fiber laser. A method, utilizing the single-mode erbium-ytterbium co-doped fiber with proper length and the highly reflective fiber Bragg grating with wide reflection bandwidth, is used to surmount the generation of Yb-ASE and low slope efficiency. More than 10 W output power is achieved, with a slope effi-ciency of 36.7% and single transverse mode output. The random fiber laser stably operates without significant amplitude fluctuation under maximum power, and which can provide a high-performance light source for a variety of applications.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Fiber lasers
Controlled terms:Efficiency - Fiber Bragg gratings
Uncontrolled terms:1550 nm - 1550 nm wavelength fiber laser - Er/Yb co-doped fiber - Erbium-ytterbium co-doped fibers - High power - Higher efficiency - Laser-based - Random fiber laser - Random fibers - Single mode
Classification code:744.4 Solid State Lasers - 913.1 Production Engineering
Numerical data indexing:Percentage 3.67E+01%, Power 1.00E+01W, Size 1.55E-06m
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4291140
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 385>
Accession number:20230913638894
Title:A Bioinspired Skin UV Filter with Broadband UV Protection, Photostability, and Resistance to Oxidative Damage
Authors:Li, Nini (1, 2); Ji, Xiaohong (1); Mukherjee, Somnath (1); Yang, Bing (1); Ren, Yuqing (1); Wang, Changhao (1); Chen, Yashao (1)
Author affiliation:(1) Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Wang, Changhao(changhaowang@snnu.edu.cn); Chen, Yashao(yschen@snnu.edu.cn)
Source title:ACS Applied Materials and Interfaces
Abbreviated source title:ACS Appl. Mater. Interfaces
Volume:15
Issue:8
Issue date:March 1, 2023
Publication year:2023
Pages:10383-10397
Language:English
ISSN:19448244
E-ISSN:19448252
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, sunscreens’ adverse impacts on the environment and biology have gained wide attention. The improvement of sunscreen safety has become one of the major priorities in skin photoprotection research. It is an effective strategy to develop bionic photoprotective materials by simulating the photoprotective mechanism existing in nature. Inspired by the photoprotective mechanisms of skin and plant leaves, the bionic photoprotective material CS-SA-PDA nanosheet was developed using the free radical grafting method and Michael addition, with natural melanin analogue polydopamine (PDA) nanoparticles and plant sunscreen molecular sinapic acid (SA) as sun protection factors and natural polymer chitosan (CS) as the connecting arm. The results show that CS-SA-PDA can effectively shield UVB and UVA due to the possible synergistic effect between PDA and SA. The introduction of polymer CS significantly improved the photostability of SA and reduced the skin permeability of PDA nanoparticles. The CS-SA-PDA nanosheet can also effectively scavenge photoinduced free radicals. Furthermore, in vivo toxicity and anti-UV evaluations confirm that CS-SA-PDA has no skin irritation and is excellent against skin photodamage, which makes it an ideal skin photoprotective material.<br/></div> © 2023 American Chemical Society.
Number of references:67
Main heading:Nanoparticles
Controlled terms:Addition reactions - Biomimetics - Bionics - Free radicals - Nanosheets - Plants (botany)
Uncontrolled terms:Bioinspired - Oxidative damage - Photo-stability - Polydopamine - Scavenging free radical - Sinapic acids - Skin photoprotective material - UV filter - UV resistance - UV-protection
Classification code:461.1 Biomedical Engineering - 461.8 Biotechnology - 461.9 Biology - 761 Nanotechnology - 802.2 Chemical Reactions - 933 Solid State Physics
DOI:10.1021/acsami.2c19773
Funding details: Number: 21773149,22072080,22222203, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021GY-201, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:We are grateful for the financial support from the National Natural Science Foundation of China (21773149, 22072080, and 22222203) and the Key Research and Development Program of Shaanxi Province (2021GY-201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 386>
Accession number:20223912797421
Title:150 Gbit/s 1 km high-sensitivity FSO communication outfield demonstration based on a soliton microcomb (Open Access)
Authors:Jia, Shuaiwei (1, 2, 3); Xie, Zhuang (1, 2, 3); Shao, Wen (1, 2, 3); Wang, Yang (1, 2, 3); He, Yuanchen (1); Zhang, Dongquan (1); Liao, Peixuan (1, 3); Wang, Weiqiang (1); Gao, Duorui (1, 3); Wang, Wei (1); Xie, Xiaoping (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:20
Issue date:September 26, 2022
Publication year:2022
Pages:35300-35310
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A high-sensitivity and large-capacity free space optical (FSO) communication scheme based on the soliton microcomb (SMC) is proposed. Using ultra-large bandwidth stabilized SMC with a frequency interval of 48.97 GHz as the laser source, 60 optical wavelengths modulated by 2.5 Gbit/s 16-Pulse position modulation (PPM) are transmitted in parallel. A corresponding outfield high-sensitivity 150 Gbit/s FSO communication experiment based on the SMC was carried out with 1 km space distance. Our experimental results show that the best sensitivity of the single comb wavelength which has higher OSNR can reach −52.62 dBm, and the difference is only 1.38 dB from the theoretical limit under the BER of 1 × 10<sup>−3</sup> without forward error correction (FEC). In addition, at BER of 1 × 10<sup>−3</sup>, 16-PPM has a higher received sensitivity of 6.73dB and 3.72dB compared to on-off keying (OOK) and differential phase shift keying (DPSK) respectively. Meanwhile, taking the advantage of multi-channel SMC, 60 × 2.5 Gbit/s can achieve 150 Gbit/s large-capacity free-space transmission. For comparison, commercially available single-wavelength laser based FSO communication system have also been performed in the outfield. The outfield experimental results demonstrated the feasibility of high-sensitivity, large-capacity PPM FSO communication based on SMCs and provided a new perspective for the future development of large-capacity, long-haul FSO communication.<br/></div> © 2022 Optica Publishing Group.
Number of references:49
Main heading:Solitons
Controlled terms:Error correction - Optical communication - Phase shift keying - Pulse position modulation
Uncontrolled terms:Communication schemes - Free Space Optical communication - Frequency intervals - High sensitivity - Laser sources - Microcombs - Optical wavelength - Pulse-position modulation - Space distance - Theoretical limits
Classification code:717.1 Optical Communication Systems
Numerical data indexing:Bit rate 1.50E+11bit/s, Bit rate 2.50E+09bit/s, Decibel 1.38E+00dB, Decibel 3.72E+00dB, Decibel 6.73E+00dB, Decibel milliwatts 5.262E+01dBm, Frequency 4.897E+10Hz, Size 1.00E+03m
DOI:10.1364/OE.465803
Funding details: Number: 61231012,62075238,91638101, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018YFC0307904-02, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (61231012, 62075238, 91638101); National Key Research and Development Program of China (2018YFC0307904-02).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 387>
Accession number:20221511940640
Title:Stability and optical tunability of flexible BST membrane observed in terahertz band
Authors:Xing, Xiaohua (1); Liu, Ming (2); Kang, Kai (3); Ding, Xin (1); Yao, Jianquan (1); Wu, Liang (1)
Author affiliation:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University Key Laboratory of Optoelectronics Information and Technology Ministry of Education, Tianjin University, Tianjin; 300072, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Mechanics Department, School of Mechanical Engineering, Tianjin University, Tianjin; 300072, China
Corresponding author:Wu, Liang(wuliang@tju.edu.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:48
Issue:13
Issue date:July 1, 2022
Publication year:2022
Pages:19006-19010
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Ferroelectric materials are generally inflexible in their normal state, and our synthesized barium strontium titanate (Ba<inf>x</inf>Sr<inf>1-x</inf>TiO<inf>3</inf>, X = 0.6, BST) films are so elastic and flexible that they can be bent at about 140°. The flexibility of the BST film prevents the material from fracturing due to mismatching forces. We demonstrate by THz-TDS (Terahertz time domain spectroscopy) system that the fabricated flexible BST film maintains a stable transmittance under different bending conditions. In addition, under an external optical pump, the transmittance amplitude can be modulated by about 90%. This property can be used in the design of tunable terahertz devices in the case of additional pumps. The film's flexibility and the possibility of further tuning will expand the range of applications for wearable terahertz devices to be developed in the near future.<br/></div> © 2022 Elsevier Ltd and Techna Group S.r.l.
Number of references:41
Main heading:Ferroelectricity
Controlled terms:Barium strontium titanate - Ferroelectric films - Optical pumping - Strontium titanates - Terahertz spectroscopy
Uncontrolled terms:BST film - Ferroelectrics materials - Flexible ferroelectric membrane - Normal state - Optical tunability - Soft modes - Synthesised - Terahertz band - Terahertz device - Time-domain terahertz spectroscopy
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 804 Chemical Products Generally - 931.1 Mechanics
Numerical data indexing:Percentage 9.00E+01%
DOI:10.1016/j.ceramint.2022.03.187
Funding details: Number: 91838301, Acronym: -, Sponsor: -;Number: 2017YFA0700202, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Natural Science Foundation of China Major Research Program Integration Project ( 91838301 ); National Key Research and Development Program of China ( 2017YFA0700202 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 388>
Accession number:20222212185955
Title:Dynamic synopsis and storage algorithm based on infrared surveillance video
Authors:Li, Xuemei (1); Qiu, Shi (2); Song, Yang (3)
Author affiliation:(1) School of Mechanical and Electrical Engineering, Chengdu University of Technology, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) High Technology Research and Development Center of the Ministry of Science and Technology, Beijing, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:124
Issue date:August 2022
Publication year:2022
Article number:104213
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared surveillance video is difficult to watch quickly and store efficiently, a surveillance video synopsis and storage algorithm is proposed based on dynamic. On the basis of extracting moving targets, the constraints of time and space is broken to build an energy functional based on filling density to quickly display the video content on the premise of ensuring the monitoring video information. The Tube structure is formed by the moving target information, and the mapping relationship between the original video and the stored video is established. Image similarity from time and space dimensions is fully utilized to realize the storage of surveillance video. The space ratio between the stored information and the original video is less than 0.2.<br/></div> © 2022 Elsevier B.V.
Number of references:39
Main heading:Infrared imaging
Controlled terms:Monitoring - Security systems
Uncontrolled terms:Energy functionals - Filling density - Infrared surveillances - Moving targets - ON dynamics - Surveillance video - Synopsis - Video - Video contents - Video information
Classification code:746 Imaging Techniques - 914.1 Accidents and Accident Prevention
DOI:10.1016/j.infrared.2022.104213
Funding details: Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;Number: 2021SDCX-121, Acronym: -, Sponsor: Postdoctoral Innovation Project of Shandong Province;
Funding text:This work is supported by Science and Technology Rising Star of Shaanxi Youth (No.2021KJXX-61); The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No.A2206); Postdoctoral Innovation Project of Shandong Province (No. 2021SDCX-121).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 389>
Accession number:20224813171456
Title:Design of Passive Constant-Force End-Effector for Robotic Polishing of Optical Reflective Mirrors (Open Access)
Authors:Zhang, Jian (1, 2); Zhao, Liangxiao (2, 3); Li, Lingling (4); Ma, Fulei (1); Chen, Guimin (4)
Author affiliation:(1) School of Mechano-Electrical Engineering, Xidian University, Xi’an; 710071, China; (2) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Robotics and Intelligent Systems, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Chen, Guimin(guimin.chen@xjtu.edu.cn)
Source title:Chinese Journal of Mechanical Engineering (English Edition)
Abbreviated source title:Chin J Mech Eng Engl Ed
Volume:35
Issue:1
Issue date:December 2022
Publication year:2022
Article number:141
Language:English
ISSN:10009345
E-ISSN:21928258
CODEN:CJMEER
Document type:Journal article (JA)
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">Polishing plays an indispensable role in optical processing, especially for large-aperture optical reflective mirrors with freeform surfaces. Robotic polishing requires effective control of the contact force between the robot and the mirror during processing. In order to maintain a constant contact force during polishing, traditional polishing robots rely on closed-loop control of air cylinders, whose performances heavily rely on high-fidelity force sensing and real-time control. This paper proposes to employ a compliant constant-force mechanism in the end-effector of a polishing robot to passively maintain a constant force between the robot and the mirror, thus eliminating the requirement for force sensing and closed-loop control. The compliant constant force mechanism utilizing the second bending mode of fixed-guided compliant beams is adopted and elaborated for the passive end-effector. An end-effector providing a constant contact force of 40 N is designed and prototyped. The polishing experiment shows that the passive constant-force end-effector provides stable contact force between the robot and the mirror with fluctuation within 3.43 N, and achieves RMS (Root Mean Square) lower than λ/10 (λ = 632.8 nm) of the polished surface of the large-aperture optical reflective mirror. It is concluded that the constant-force compliant mechanism provides a low-cost and reliable solution for force control in robotic polishing.<br/></div> © 2022, The Author(s).
Number of references:25
Main heading:Force control
Controlled terms:Closed loop control systems - Compliant mechanisms - End effectors - Mechanisms - Mirrors - Polishing - Real time control
Uncontrolled terms:Compliant beams - Constant force - Constant-force compliant mechanism - Contact forces - Fixed-guided compliant beam - Optical reflective - Passive force control - Passive forces - Reflective mirrors - Robotic polishing
Classification code:601.3 Mechanisms - 604.2 Machining Operations - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 731.5 Robotics - 741.3 Optical Devices and Systems - 931.1 Mechanics - 961 Systems Science
Numerical data indexing:Force 3.43E+00N, Force 4.00E+01N, Size 6.328E-07m
DOI:10.1186/s10033-022-00811-3
Funding details: Number: U1913213, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2016A10, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:Supported by National Natural Science Foundation of China (Grant No. U1913213), West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016A10), and Shanxi Provincial Key Research and Development Projects of China (Grant No. 2018ZDXM-GY-105).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 390>
Accession number:20224913216676
Title:Method of compensating for time measurement error of photomultiplier tube (Open Access)
Title of translation:光电倍增管时间测量误差补偿方法研究 (Open Access)
Authors:Wang, Chong (1); Dang, Wen-Bin (1); Zhu, Bing-Li (2); Yang, Kai (2, 3); Yang, Jia-Hao (1); Han, Jiang-Hao (1)
Author affiliation:(1) School of Electronic Engineering, Xi’an University of Posts & Telecommunications, Xi’an; 710121, China; (2) Key Laboratory of Ultra-Rapid Diagnostic Technology, Xi’an Institute of Optoelectronic Precision Machinery, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Chinese Academy of Sciences University, Beijing; 100049, China
Corresponding author:Dang, Wen-Bin(Dang_wb@163.com)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:22
Issue date:November 20, 2022
Publication year:2022
Article number:222901
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the temporal resolution of photomultiplier tubes, our research group has conducted the in-depth research on photomultiplier tubes based on microchannel plates that are widely used at present. The time resolution of photomultiplier tube based on microchannel plate is limited by the transit time of photoelectric signal in each part, including the transit time of photoelectric signal in the transmission process of photocathode to microchannel plate, the transit time of photoelectric signal in microchannel plate time, the transit time of the photoelectric signal from the microchannel plate to the detector anode, and the transit time of the photoelectric signal on the anode to the electrode port. The transit time of the whole process has a certain degree of influence on the time information measurement of the optoelectronic signal. In this study, various parameters affecting the time resolution of the photomultiplier tube are analyzed, and it is found that the different positions of the photoelectron signal on the anode will bring errors to the measurement of the arrival time of the signal at the anode, and the photoelectric signal is transmitted to the electrode port at the affected point of the anode The spent time will cause the signal measurement time to lag behind the real time, which indirectly affects the time resolution of the system. Therefore, a specific study is carried out on the time measurement error of the signal on the anode, and it is determined that the difference of the photoelectron signal on the anode position is an important factor causing the signal time measurement error, and a simple and effective method of compensating for error is proposed. In the research process, the delay line anode is used, and the positional resolution principle of the photoelectric signal is used to obtain the position information of the photoelectron signal on the anode, and the position information is converted into the time information transmitted from the position to the electrode port. The theoretical value of the transit time on the anode is offset, eliminating unnecessary time in the time-of-arrival measurement of the photoelectron signal. The time measurement error of the optoelectronic signal is compensated for by this time information. The experimental results show that the error compensation method can effectively improve the time measurement accuracy of optoelectronic signals, and provide solutions and theoretical basis for improving the time resolution of photomultiplier tubes based on microchannel plates.<br/></div> © 2022 Chinese Physical Society.
Number of references:20
Main heading:Anodes
Controlled terms:Cost functions - Error compensation - Image storage tubes - Measurement errors - Photoelectrons - Photomultipliers - Photons - Time measurement - Tubes (components)
Uncontrolled terms:Delay line anode - Measurements of - Micro channel plate - Photoelectric signals - Photoelectron signals - Photomultiplier tube - Signal-on - Time information - Time-resolution - Transit-time
Classification code:619.1 Pipe, Piping and Pipelines - 711 Electromagnetic Waves - 714.1 Electron Tubes - 921.5 Optimization Techniques - 931.3 Atomic and Molecular Physics - 943.3 Special Purpose Instruments
DOI:10.7498/aps.71.20221193
Funding details: Number: 61805199, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JM-578, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 61805199 ), and the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-578). † Corresponding author. E-mail: Dang_wb@163.com
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 391>
Accession number:20221712008609
Title:Tunable depth of focus with modified complex amplitude modulation of an optical field
Authors:Yin, Weiyu (1, 2); Yang, Yanlong (1); Yang, Ruiwen (1); Yao, Baoli (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266200, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:12
Issue date:April 20, 2022
Publication year:2022
Pages:3502-3509
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Bessel beams have nondiffraction and self-healing properties in the propagation direction and are widely used in particle optical manipulation and optical microscopy. Bessel beams can be generated by axicons or spatial light modulators, which can produce a zero-order or high-order Bessel beam with different parameters depending on the specific application. The modulation of Bessel beams achieved in the spatial spectrum domain by optimization algorithms has a low light energy utilization rate due to the small effective modulation region. We propose a Bessel-like beam phase generation algorithm based on an improved iterative optimization algorithm directly in the spatial domain to achieve a tunable modulation of the beam’s length and the axial center position. The optimization time is reduced from minutes to seconds relative to the genetic algorithm, providing a new means of modulation for different applications in various fields.<br/></div> © 2022 Optica Publishing Group
Number of references:19
Main heading:Amplitude modulation
Controlled terms:Bessel functions - Optical signal processing - Genetic algorithms - Laser beams - Light modulation - Energy utilization - Iterative methods - Light modulators
Uncontrolled terms:Axicons - Complex amplitude - Depth-of-focus - Optical field - Optical manipulation - Optical- - Propagation direction - Self-healing properties - Spatial light modulators - Tunables
Classification code:525.3 Energy Utilization - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 921 Mathematics - 921.6 Numerical Methods
DOI:10.1364/AO.453313
Funding details: Number: 12127805, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (12127805).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 392>
Accession number:20230613565944
Title:Rapid full-color Fourier ptychographic microscopy via spatially filtered color transfer
Authors:Chen, Jiurun (1, 2, 3); Wang, Aiye (1, 2, 3); Pan, An (1, 2); Zheng, Guoan (4); Ma, Caiwen (1, 2); Yao, Baoli (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) CAS Key Laboratory of Space Precision Measurement Technology, Xi’an; 710119, China; (4) Department of Biomedical Engineering, University of Connecticut, Storrs; CT; 06269, United States
Corresponding author:Pan, An(panan@opt.cn)
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:10
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2410-2421
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Full-color imaging is of critical importance in digital pathology for analyzing labeled tissue sections. In our previous cover story [Sci. China: Phys., Mech. Astron. 64, 114211 (2021)], a color transfer approach was implemented on Fourier ptychographic microscopy (FPM) for achieving high-throughput full-color whole slide imaging without mechanical scanning. The approach was able to reduce both acquisition and reconstruction time of FPM by three-fold with negligible trade-off on color accuracy. However, the method cannot properly stain samples with two or more dyes due to the lack of spatial constraints in the color transfer process. It also requires a high computation cost in histogram matching of individual patches. Here we report a modified full-color imaging algorithm for FPM, termed color-transfer filtering FPM (CFFPM). In CFFPM, we replace the original histogram matching process with a combination of block processing and trilateral spatial filtering. The former step reduces the search of the solution space for colorization, and the latter introduces spatial constraints that match the low-resolution measurement. We further adopt an iterative process to refine the results. We show that this method can perform accurate and fast color transfer for various specimens, including those with multiple stains. The statistical results of 26 samples show that the average root mean square error is only 1.26% higher than that of the red-green-blue sequential acquisition method. For some cases, CFFPM outperforms the sequential method because of the coherent artifacts introduced by dust particles. The reported CFFPM strategy provides a turnkey solution for digital pathology via computational optical imaging.<br/></div> © 2022 Chinese Laser Press.
Number of references:47
Main heading:Color
Controlled terms:Color image processing - Economic and social effects - Graphic methods - Iterative methods - Mean square error - Pathology
Uncontrolled terms:Color imaging - Color transfers - Digital pathologies - Fourier - Full color - High-throughput - Histogram matching - Mechanical scanning - Spatial constraints - Tissue sections
Classification code:461.6 Medicine and Pharmacology - 741.1 Light/Optics - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 971 Social Sciences
Numerical data indexing:Percentage 1.26E+00%
DOI:10.1364/PRJ.473038
Funding details: Number: 12104500, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (12104500).National Natural Science Foundation of China
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 393>
Accession number:20222512240520
Title:Dielectric property and tunability of multilayer BST-BTO thin film in the terahertz range (Open Access)
Authors:Zhang, Xi (1); Liu, Ming (2); Fu, Yi (1); Kang, Kai (3); Ding, Xin (1); Yao, Jianquan (1); Wang, Zhiyong (3); Wu, Liang (1)
Author affiliation:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin; 300072, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) College of Mechanical Engineering, Tianjin University, Key Laboratory of Modern Engineering Mechanics (Ministry of Education), Tianjin; 300072, China
Corresponding author:Wu, Liang(wuliang@tju.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:155
Issue date:November 2022
Publication year:2022
Article number:108366
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The dielectric property and tunability of Ba<inf>0.6</inf>Sr<inf>0.4</inf>TiO<inf>3</inf> (BST) and BaTiO<inf>3</inf> (BTO) multilayer thin film were investigated by using terahertz time-domain spectroscopy (THz-TDS) at room temperature. The film samples used in the study had a same total thickness but different numbers of periodic layer N (a single BTO layer plus a single BST layer) and different layer thickness ratios x (x for total BTO layer thickness to total film thickness; 1-x for total BST layer thickness to total film thickness). We found that the permittivity of the samples declined with the increase of N, which can also be modulated by external optical pumping. The dielectric loss of the sample with N = 1 was much higher than that of other samples, which could be attributed to the interfacial polarization between BST and BTO thin films. In short, the dielectric property of layered BST-BTO composite structure can be appreciably changed by selecting the number of periodical layers and the corresponding layer thickness. These results indicate that the multilayer thin film structure is possible for the applications of tunable photonic devices in the terahertz range.<br/></div> © 2022 The Authors
Number of references:31
Main heading:Film preparation
Controlled terms:Barium titanate - Dielectric losses - Film thickness - Multilayer films - Multilayers - Optical pumping - Permittivity - Perovskite - Photonic devices - Strontium compounds - Terahertz spectroscopy
Uncontrolled terms:Ba0.6sr0.4TiO3 - BaTiO 3 - Dielectric tunability - Dielectrics property - Layer thickness - Multi-layer thin film - Tera Hertz - Terahertz range - Thin-films - TiO
Classification code:482.2 Minerals - 708.1 Dielectric Materials - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 812.1 Ceramics - 931.1 Mechanics
DOI:10.1016/j.optlastec.2022.108366
Funding details: Number: AFMD-KFJJ-21201, Acronym: -, Sponsor: -;Number: 91838301, Acronym: -, Sponsor: -;Number: 2017YFA0700202, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China Major Research Program Integration Project (91838301), the National Key Research and Development Program of China (2017YFA0700202), and in part by the Fundamental Research Funds of Shaanxi Key Laboratory of Artificially-Structured Materials and Devices (AFMD-KFJJ-21201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
<RECORD 394>
Accession number:20230113327717
Title:Adaptive Style Modulation for Artistic Style Transfer
Authors:Zhang, Yipeng (1, 2, 3); Hu, Bingliang (1, 2); Huang, Yingying (1, 2, 3); Gao, Chi (1, 2, 3); Wang, Quan (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) The Key laboratory of Biomedical Spectroscopy of Xi’an, Shaanxi, Xi’an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100190, China
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:Neural Processing Letters
Abbreviated source title:Neural Process Letters
Issue date:2022
Publication year:2022
Language:English
ISSN:13704621
E-ISSN:1573773X
CODEN:NPLEFG
Document type:Article in Press
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">Arbitrary-style-per-model (ASPM) style transfer algorithms transfer arbitrary styles based on a single model. Statistics-based learning algorithms of ASPM, represented by adaptive instance normalization (AdaIN), conduct instance normalization and then perform an affine transformation on target features. These algorithms are computationally efficient and easy to embed in convolutional neural networks. Consequently, they are widely used in image synthesis tasks to control the style of the resulting images. However, the style of stylized images may be a combination of content and stylized images, which suggests that these methods do not transform styles accurately. In this work, we rethink the function of AdaIN in controlling style. We show that the role of AdaIN is to (1) give each input content image a specific optimization target, (2) dynamically set cross-channel correlations, and (3) act as a feature selector after combining it with an activation function. Accordingly, we propose adaptive style modulation (AdaSM), which fully leverages the three roles mentioned above and thereby enables more precise control of global style. Experimental results show that AdaSM provides superior style controllability, alleviates the style blending problem, and outperforms state-of-the-art methods in artistic style transfer tasks.<br/></div> © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Number of references:62
Main heading:Deep learning
Controlled terms:Convolutional neural networks - Image processing - Learning algorithms - Transfer learning
Uncontrolled terms:Affine transformations - Artistic style transfer - Deep learning - Images processing - Neural-networks - Normalisation - Single models - Statistic-based - Style transfer - Target feature
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.4.2 Machine Learning
DOI:10.1007/s11063-022-11135-7
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key Laboratory of Biomedical Spectroscopy of Xi’an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 395>
Accession number:20223112521814
Title:Scanning dual-microcomb spectroscopy
Authors:Wang, Yang (1, 2); Wang, Zhichuang (1, 2); Wang, Xinyu (1, 2); Shao, Wen (1, 2); Huang, Long (1, 2); Liang, Bo (1, 2); Little, Brent E. (1, 2); Chu, Sai T. (3); Zhao, Wei (1, 2); Wang, Weiqiang (1, 2); Zhang, Wenfu (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Physics and Materials Science, City University of Hong Kong, 999077, Hong Kong
Corresponding authors:Wang, Weiqiang(wwq@opt.ac.cn); Zhang, Wenfu(wfuzhang@opt.ac.cn)
Source title:Science China: Physics, Mechanics and Astronomy
Abbreviated source title:SCI. CHINA Phys. Mech. Astron.
Volume:65
Issue:9
Issue date:September 2022
Publication year:2022
Article number:294211
Language:English
ISSN:16747348
E-ISSN:18691927
Document type:Journal article (JA)
Publisher:Science Press (China)
Abstract:<div data-language="eng" data-ev-field="abstract">Dual-comb spectroscopy (DCS) is a powerful tool in molecular spectroscopy benefiting from the advantages of high resolution and short measurement time. The recently developed soliton microcomb (SMC) can potentially transfer the dual-comb method to an on-chip platform. In this paper, we demonstrate DCS using two frequency scanning SMCs, termed scanning dual-microcomb spectroscopy (SDMCS). The two SMCs are generated by an auxiliary-assisted thermal balance scheme, and the pump laser frequency sweeps over one free spectral range of the microresonator (∼49 GHz) using a feedback control system. The proposed SDMCS has a spectral resolution of 12.5 MHz, which is determined by the minimum sweeping step of the pump laser. Using this SDMCS system, we perform three types of gas molecule absorption spectroscopy recognition and gas concentration detection. This study paves the way for integrated DCS with a high signal-to-noise ratio, high spectral resolution, and fast acquisition rate.<br/></div> © 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:30
Main heading:Solitons
Controlled terms:Absorption spectroscopy - Adaptive control systems - Closed loop systems - Feedback control - Molecular spectroscopy - Pumping (laser) - Resonators - Scanning - Signal to noise ratio - Spectral resolution
Uncontrolled terms:07.07. - 42.60. - 42.65. - 42.82. - 82.80. - Da - Df - Dual-comb spectroscopy - Dx - Gas sensing - Micro resonators - Microcombs - Soliton microcomb - Tg - −m
Classification code:716.1 Information Theory and Signal Processing - 731.1 Control Systems - 741.1 Light/Optics - 744.1 Lasers, General - 961 Systems Science
Numerical data indexing:Frequency 1.25E+07Hz, Frequency 4.90E+10Hz
DOI:10.1007/s11433-022-1920-6
Funding details: Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFB2800600, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key R&D Program of China (Grant No. 2021YFB2800600), and National Natural Science Foundation of China (Grant No. 62075238).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 396>
Accession number:20222812335848
Title:Alignment technology based on a central small aperture for the AIMS telescope
Authors:Shen, Yuliang (1, 2); Kewei, E. (3); Fu, Xing (3); Wang, Dongguang (1); Hou, Junfeng (1, 2); Liang, Ming (4); Xu, Songbo (3)
Author affiliation:(1) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) National Optical-Infrared Astronomy Research Laboratory, Tucson; AZ; 85719, United States
Corresponding author:Wang, Dongguang(wdg@bao.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:19
Issue date:July 1, 2022
Publication year:2022
Pages:5646-5656
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The accurate infrared solar magnetic field measurement system (AIMS) is a 1 m off-axis Gregorian alt-azimuth solar telescope and will be dedicated to measuring the solar magnetic field in mid-infrared. How to align the large-aperture off-axis system is a significant issue. Sub-aperture stitching with the small-aperture standard flat mirror can be applied to the alignment of the large-aperture off-axis system. However, this method is time-consuming and inefficient. We propose an alignment method based on the Zernike polynomials of the central small aperture to solve the low efficiency of sub-aperture stitching. Theoretical simulation shows that the RMS residual error of the system after using the central small-aperture alignment method will be less than 4.5 ∗ 10<sup>−6</sup>λ at 632.8 nm. Practical alignment suggests that our method can make the RMS value of full-aperture wave aberration quickly converge to 0.12λ at 632.8 nm. Compared with the sub-aperture stitching method, our method can significantly reduce the times of sub-aperture stitching and save the alignment time.<br/></div> © 2022 Optica Publishing Group
Number of references:11
Main heading:Alignment
Controlled terms:Magnetic field measurement - Magnetic fields - Telescopes
Uncontrolled terms:Alignment methods - Field measurement systems - Gregorian - Large aperture - Magnetic fields measurements - Off-axis - Small aperture - Solar magnetic fields - Sub-aperture stitching - Technology-based
Classification code:601.1 Mechanical Devices - 701.2 Magnetism: Basic Concepts and Phenomena - 942.4 Magnetic Variables Measurements
Numerical data indexing:Size 1.00E00m, Size 6.328E-07m
DOI:10.1364/AO.459464
Funding details: Number: 11403047,11427803,11427901,11773040, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA15010800,XDA15320102, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022057,XIOPM-CAS E15151Z1, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:Funding. National Natural Science Foundation of China (11403047, 11427803, 11427901, 11773040); The Strategic Pioneer Program on Space Science, Chinese Academy of Sciences (XDA15010800, XDA15320102); Youth Innovation Promotion Association (CAS NO.2022057, XIOPM-CAS E15151Z1).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 397>
Accession number:20224713139256
Title:Ship Detection in Remote Sensing Image Based on Dense RFB and LSTM (Open Access)
Title of translation:Dense RFB 和 LSTM 遥感图像舰船目标检测 (Open Access)
Authors:Zhang, Tao (1); Yang, XiaoGang (1); Lu, XiaoQiang (2); Lu, RuiTao (1); Zhang, ShengXiu (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 80142, China; (2) Rocket Force University of Engineer, Xi’an; 91034, China
Source title:National Remote Sensing Bulletin
Abbreviated source title:National Remote Sensing Bulletin
Volume:26
Issue:9
Issue date:September 2022
Publication year:2022
Pages:1859-1871
Language:Chinese
ISSN:10074619
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Deep learning method had get great progress in remote sensing ship target detection, however there are still two main shortcomings as follows. One is that remote sensing image targets have multi-scale and multidirectional characteristics, especially for ship targets which are arbitrarily densely arranged, while existing detection networks lack of interactions between high-level and low-level features and ignore the context semantic information, which leads to poor detection results. The other is that the background of remote sensing images is complex and easily affected by factors such as light and clouds, resulting in the imbalance of positive and negative samples for target detection. In order to solve the problems above, a multi-scale ship target detection algorithm based on Dense RFB and LSTM is proposed in this paper. Firstly, a Dense RFB feature enhance module (Dense RFB-FE) is designed, which adopts feature multiplexing and expanded convolution to simulate the human eye point of view mechanism to increase the feature experience without increasing the amount of calculation, enhancing the ability to extract feature of shallow network details. Secondly, a deep multi-scale feature pyramid fusion module (MFPF) is designed, drawing on the ideas of FPN and LSTM, using deconvolution and residual structure to fuse deep multi-scale features, filtering invalid feature information, effectively to extract deep semantic information and enhance the expressive ability of the network feature layer. Finally, a new loss function is designed, the focus classification loss function is added to effectively solve the problem of imbalance of positive and negative sample, improving the accuracy of ship target detection. Experiments on optical remote sensing image dataset show that the average detection accuracy of the proposed algorithm for ship targets reaches 81.98%, and the detection speed reaches 29.6fps, which reduces the false detection rate and missed detection rate of target detection to a certain extent. In addition, for ship targets that are blurred, occluded, and partially cropped, the detection effect of the algorithm in this paper is also better than that of the original classic algorithm, which shows that by fusing the semantic information of the feature layer and the detailed positioning information, the generalization ability and characterization of the feature can be improved, which improves the accuracy of ship target detection in remote sensing images. In the future, the algorithm will be further optimized for the problems of multi-scale and dense arrangement of ship targets in remote sensing images. The rotating boxes will be used to accurately position the ship to reduce the interference of complex backgrounds. At the same time, the remote sensing image ship target datasets will be expanded to improve the ship target detection capability of the optical remote sensing image.<br/></div> © 2022 National Remote Sensing Bulletin. All rights reserved.
Number of references:29
Main heading:Optical remote sensing
Controlled terms:Convolution - Deep learning - Feature extraction - Image enhancement - Information filtering - Learning systems - Network layers - Semantics - Ships
Uncontrolled terms:Dense RFB - Feature pyramid - Feature pyramid network - LSTM - Multi-scale features - Pyramid network - Remote sensing images - Ship target detection - Ship targets - Targets detection
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 903.1 Information Sources and Analysis
Numerical data indexing:Percentage 8.198E+01%
DOI:10.11834/jrs.20211042
Funding details: Number: 61806209, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 201851U8012, Acronym: -, Sponsor: Aeronautical Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Supported by National Natural Science Foundation of China (No. 61806209); the Aero Science Foundation of China (No. 201851U8012); Natural Science Basic Research Program of Shaanxi（Program No.2021JQ-373）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 398>
Accession number:20220511570287
Title:Cross-Connected Bidirectional Pyramid Network for Infrared Small-Dim Target Detection
Authors:Bai, Yuanning (1); Li, Ruimin (2); Gou, Shuiping (1); Zhang, Chenchen (3); Chen, Yaohong (4); Zheng, Zhihui (5)
Author affiliation:(1) Key Laboratory of Intelligent Perception and Image Understanding, Ministry of Education, Xidian University, Xi'an, China; (2) Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, China; (3) School of Maritime Economics and Management, Dalian Maritime University, Dalian, China; (4) Chinese Academy of Sciences (CAS), Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (5) Beijing Aerospace Automatic Control Institute, Beijing, China
Corresponding authors:Gou, Shuiping(shpgou@mail.xidian.edu.cn); Li, Ruimin(rmli@xidian.edu.cn)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared small-dim target detection is an important technology in the fields of infrared guidance, anti-missile, and tracking system. Due to the small size of targets, no obvious structure information, and low image signal-to-noise ratio (SNR), infrared small-dim target detection is still a challenging task. In this letter, a cross-connected bidirectional pyramid network (CBP-Net) is proposed for infrared small-dim target detection. The main body of the CBP-Net is to embed a bottom-up pyramid in the feature pyramid network (FPN), which is designed to provide more comprehensive target information by connecting with the original multi-scale features and the top-down pyramid. The bottom-up pyramid together with the top-down pyramid forms the proposed bidirectional pyramid structure. Then, an region of interest (ROI) feature augment module (RFA) composed of deformable ROI pooling and position attention is designed to fuse multi-scale ROI features and enhance the spatial information of the small-dim target. Besides, a regular constraint loss (RCL) is introduced to restrict multi-scale feature fusion to learn more precise target location information. Experimental results on two challenging datasets show that the performance of the proposed CBP-Net is superior to the state-of-the-art methods.<br/></div> © 2004-2012 IEEE.
Number of references:22
Main heading:Signal to noise ratio
Controlled terms:Image segmentation
Uncontrolled terms:Bottom up - Constraint loss - Crossconnected bidirectional pyramid network - Dim target detection - Infrared small-dim target detection - Multi-scale features - Pyramid network - Regular constraint loss - ROI feature augment - Small dim targets
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/LGRS.2022.3145577
Funding details: Number: 61801345,61806154,62102296, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JC2102, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61801345, Grant 61806154, and Grant 62102296 and in part by the Fundamental Research Funds for the Central Universities under Grant JC2102.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 399>
Accession number:20220121467
Title:Influence of the Rotary Ultrasonic Vibrating Direction on Surface Quality in Aspheric Grinding Glass-Ceramics
Authors:Sun, Guoyan (1, 2); Shi, Feng (1); Zhang, Bowen (3); Zhao, Qingliang (3); Zhang, Wanli (1); Wang, Yongjie (2); Tian, Ye (1)
Author affiliation:(1) College of Artificial Intelligence, National University of Defense Technology, NO.109 Deya Road, Changsha; 410003, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Center for Precision Engineering School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China
Corresponding author:Shi, Feng(shifeng@nudt.edu.cn)
Source title:SSRN
Issue date:May 26, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">Glass-ceramics are considered superior materials for aspherical optics in large-aperture telescopes and space mirrors due to their outstanding mechanical and thermal performance. To improve the processing quality and efficiency of glass-ceramics, ultrasonic vibration assisted grinding (UVG) is widely studied, focusing on machining mechanism and surface generation. However, the machining characteristics of aspheric surface are rarely studied. Herein, rotary ultrasonic vibration assisted vertical grinding (RUVG), where the vibration direction of grinding wheel is parallel to the rotation liner velocity direction of the workpiece, and rotary ultrasonic vibration assisted parallel grinding (RUPG), where the vibration direction of grinding wheel is vertical to the rotation liner velocity direction of workpiece, are proposed for aspheric surface machining of glass-ceramics. To reveal the surface formation mechanism of both UVG methods theoretically, single-grain kinematic functions are created and contact characteristics between the grinding wheel and aspheric surface are analyzed, as well as the grinding marks corresponding to RUVG and RUPG are simulated. It is worth noting that different ultrasonic vibration (UV) directions lead to significant differences in cutting contact time, contact area, instantaneous relative velocity value and velocity direction between the aspheric surface and grinding wheel. Subsequently, comparative experiments are conducted on an ellipsoid surface of glass-ceramics and the results indicate that there are slight distinctions in macro-grinding surface texture pattern and surface roughness between RUVG and RUPG. From the surface form accuracy viewpoint, RUVG exhibits a more prominent influence than the RUPG, rendering a low surface profile error. The differences in grinding surface quality of RUVG and RUPG mainly depend on grinding parameters, UV parameters and material properties. The current research enables an in-depth understanding of comprehensive mechanisms of RUG for aspheric surface machining of brittle materials and provides theoretical bases for the application of UVG methods on the machining of complex surfaces.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:25
Main heading:Ultrasonic effects
Controlled terms:Aspherics - Glass ceramics - Grinding (machining) - Grinding wheels - Surface properties - Surface roughness - Textures - Ultrasonic waves - Velocity - Vibrations (mechanical)
Uncontrolled terms:Aspheric surfaces - Glass-ceramics - Grinding methods - Grinding surfaces - Parallel grinding - Rotary ultrasonic vibration - Surface machining - Ultrasonic vibration assisted grinding - Velocity directions - Workpiece
Classification code:604.2 Machining Operations - 741.1 Light/Optics - 753.1 Ultrasonic Waves - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4119791
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 400>
Accession number:20224913212821
Title:Surface plasmon-enhanced photodetection of monolayers MoS<inf>2</inf>on an ion beam modified functional substrate
Authors:Lu, Shijia (1); Chen, Jiamin (1); Yang, Fan (1, 2); Han, Huangpu (3); Li, Xiangyang (4); Chen, Linlin (1); Wu, Yuhao (1); He, Bin (1); Chai, Guangyue (1); Ruan, Shuangchen (1); Xiang, Bingxi (1)
Author affiliation:(1) College of New Materials and New Energies, Shenzhen Technology University, Shenzhen; 518118, China; (2) School of Sciences, Xi'An Technological University, Xi'an; 710021, China; (3) School of Intelligent Manufacturing, Zibo Vocational Institute, Zibo; 255314, China; (4) Key Laboratory of Advanced Optical Precision Manufacturing Technology, Guangdong Higher Education Institutes, College of Applied Technology, Shenzhen University, Shenzhen; 518060, China
Corresponding author:Xiang, Bingxi(xiangbingxi@sztu.edu.cn)
Source title:Journal of Applied Physics
Abbreviated source title:J Appl Phys
Volume:132
Issue:18
Issue date:November 14, 2022
Publication year:2022
Article number:183102
Language:English
ISSN:00218979
E-ISSN:10897550
CODEN:JAPIAU
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Monolayer molybdenum disulfide (1L-MoS2) is considered a potential optoelectronic device material due to its ultrathin and direct bandgap properties. However, the absorption of incident light by 1L-MoS2 has shown to be relatively low and is not sufficient to implement high photoelectric conversion efficiency, limiting its practical applications in photodetectors. Due to the local surface plasmon resonance effect, the integration of plasma nanoparticles (NPs) with 2D materials may provide a promising method for enhancing light-matter interactions. Nevertheless, MoS2 may undergo fold deformation when transferred to the plasma structure when prepared via conventional strategies, resulting in the introduction of larger defects. In this work, we reported on a photodetector with enhanced MoS2 photoresponsivity on a flat plasmon functional substrate, in which the Ag NPs were embedded into fused silica (SiO2) by ion implantation. Using MoS2/Ag NPs:SiO2 architecture, the photocurrent of the MoS2-based photodetector was significantly improved under incident light of 375, 532, and 635 nm, with a maximum increase of 72.8 times, while the response time also decreased to a certain extent. Furthermore, the plasma functional substrate had the advantages of environmental stability and repeatable recycling, allowing it to be easily integrated with different 2D materials. Thus, this work offered a viable path for realizing efficient photodetectors based on 2D material.<br/></div> © 2022 Author(s).
Number of references:40
Main heading:Layered semiconductors
Controlled terms:Fused silica - Incident light - Molybdenum disulfide - Monolayers - Photodetectors - Photons - Surface plasmon resonance
Uncontrolled terms:Bandgap properties - Device materials - Incident light - Local surface plasmon resonances - Optoelectronics devices - Photo detection - Photo-electric conversion efficiency - Surface plasmon resonance effects - Surface-plasmon - Ultra-thin
Classification code:712.1 Semiconducting Materials - 741.1 Light/Optics - 804.2 Inorganic Compounds - 812.3 Glass - 931.3 Atomic and Molecular Physics
Numerical data indexing:Size 6.35E-07m, Volume 1.00E-03m3
DOI:10.1063/5.0118004
Funding details: Number: JCYJ20190813103207106, Acronym: -, Sponsor: -;Number: SZWD2021015, Acronym: -, Sponsor: -;Number: 2020KTSCX125, Acronym: -, Sponsor: -;Number: 2020GCZX005, Acronym: -, Sponsor: -;Number: 12105190,61935014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (Nos. 12105190 and 61935014), Shenzhen Science and Technology Planning (No. JCYJ20190813103207106), the University Engineering Research Center of Crystal Growth and Applications of Guangdong Province (No. 2020GCZX005), Special Innovative Projects of Guangdong Province (No. 2020KTSCX125), and Shenzhen Stable Supporting Program (No. SZWD2021015).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 401>
Accession number:20214811226221
Title:Dwarfism computer-aided diagnosis algorithm based on multimodal pyradiomics
Authors:Qiu, Shi (1); Jin, Yi (2, 3); Feng, Songhe (2, 3); Zhou, Tao (4); Li, Yidong (2, 3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) The Beijing Key Laboratory of Traffic Data Analysis and Mining, Beijing, China; (3) The School of Computer and Information Technology Beijing Jiaotong University, Beijing, China; (4) School of Computer Science and Engineering, North Minzu University, Yinchuan; Ningxia, China
Corresponding author:Jin, Yi(yjin@bjtu.edu.cn)
Source title:Information Fusion
Abbreviated source title:Inf. Fusion
Volume:80
Issue date:April 2022
Publication year:2022
Pages:137-145
Language:English
ISSN:15662535
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Dwarfism refers to the phenomenon that children with same gender and age are lower than two standard deviations of normal height in the same living environment. It is of great significance for early diagnosis and early treatment of dwarfism. Dwarfism can be divided into growth hormone deficiency (GHD) and idiopathic short stature (ISS). GHD can be distinguished by growth hormone, while ISS is difficult to distinguish because its hormone features are not obvious. Thus, a computer-aided diagnosis model based on brain image data and clinical features is established for the first time and a dwarfism prediction algorithm is proposed based on multimodal pyradiomics. Firstly, we establish the extraction of pituitary gland based on tensor and binary wavelet model, as the pituitary gland is an important organ that affects the growth hormone. Then, the multi-dimensional fusion model is established to distinguish dwarfism. In the process of distinguishment, the pyradiomics features and clinical features are extracted to distinguish together. Finally, dwarfism computer-aided diagnosis algorithm based on multimodal pyradiomics is realized.<br/></div> © 2021
Number of references:53
Main heading:Computer aided diagnosis
Controlled terms:Learning algorithms - Brain computer interface - Brain - Brain mapping
Uncontrolled terms:Child - Clinical features - Diagnosis algorithms - Dwarfism - Growth hormone deficiency - Growth hormones - Multi-modal - Pituitary gland - Pyradiomic - Standard deviation
Classification code:461.1 Biomedical Engineering - 722.2 Computer Peripheral Equipment - 723.4.2 Machine Learning - 723.5 Computer Applications - 746 Imaging Techniques
DOI:10.1016/j.inffus.2021.11.012
Funding details: Number: 2020BEB04022,2020KYQD08,A2026, Acronym: -, Sponsor: -;Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 1561040,62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M682144, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018AAA0100302, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work is supported by National Key R&D Program of China under Grant No. 2018AAA0100302 , Postdoctoral Science Foundation of China under Grant No. 2020M682144 . Science and Technology Rising Star of Shaanxi Youth under Grant No. 2021KJXX-61 . The Natural Science Foundation of China under Grant No. 1561040 and 62062003 . Ningxia Key Research and Development Project under Grant No. 2020BEB04022 . North Minzu University Research Project of Talent Introduction under Grant No. 2020KYQD08 . The Open Project Program of the State Key Lab of CAD and CG under Grant No. A2026 .
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 402>
Accession number:20223712731448
Title:Polarization-Dependent Scattering of Nanogratings in Femtosecond Laser Photowritten Waveguides in Fused Silica (Open Access)
Authors:Cheng, Guanghua (1); Lin, Ling (2); Mishchik, Konstantin (3); Stoian, Razvan (3)
Author affiliation:(1) School of Artificial Intelligence, Optics and Electronics(iOPEN), Northwestern Polytechnical University, Xi’an; 710072, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Université Jean Monnet, Saint Etienne; 42000, France
Corresponding author:Cheng, Guanghua(guanghuacheng@nwpu.edu.cn)
Source title:Materials
Abbreviated source title:Mater.
Volume:15
Issue:16
Issue date:August 2022
Publication year:2022
Article number:5698
Language:English
E-ISSN:19961944
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The properties of polarization-selective, light-guiding systems upon subwavelength nanogratings formation in the case of type II refractive index traces induced by femtosecond laser pulses in bulk fused silica were studied. Polarization-dependent scattering is analyzed both in simulation using a finite-difference, time-domain method and in experiments. We argue that the polarization-sensitive optical guiding of type II waveguides is due to polarization-dependent scattering of nanogratings. Optical designs can then be suggested where the guiding efficiency of type I traces can be combined with type II anisotropies. A low-loss waveguide polarizer is demonstrated based on the modulation of the evanescent field emerging from type I waveguides using polarization-dependent scattering of neighboring nanogratings.<br/></div> © 2022 by the authors.
Number of references:23
Main heading:Polarization
Controlled terms:Evanescent fields - Femtosecond lasers - Fused silica - Laser pulses - Refractive index - Time domain analysis - Waveguides
Uncontrolled terms:Dependent scatterings - Femtosecond phenomenon - Guiding systems - Light-guiding - Nanograting - Polarization sensitive - Polarization-selective devices - Property - Sub-wavelength - Type II
Classification code:701 Electricity and Magnetism - 714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass - 921 Mathematics
DOI:10.3390/ma15165698
Funding details: Number: KQ111501114, Acronym: -, Sponsor: -;Number: ANR 2011 BS09 026 01, Acronym: ANR, Sponsor: Agence Nationale de la Recherche;
Funding text:This research was funded by State Key Laboratory Foundation of AVIC Manufacturing Technology Institute, [ant number KQ111501114] and the Agence Nationale de la Recherche, France, [rant number ANR 2011 BS09 026 01].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 403>
Accession number:20223012397908
Title:Research on Valuation Level Analysis and Prediction Method of Listed Enterprises Based on Market Sales Ratio
Authors:Wen, Xingjian (1); Chen, Yaxuan (2); Yang, Kai (3); Wang, Fan (3, 4, 5); Li, Xijie (6)
Author affiliation:(1) Guangzhou Foreign Language School, Guangzhou, China; (2) School of Computer Science, Wuhan Donghu University, Wuhan, China; (3) Sanya Science and Education Innovation Park of Wuhan University of Technology, Sanya, China; (4) Wuhan University of Technology, Wuhan, China; (5) Wuhan University of Technology Chongqing Research Institute, Chongqing, China; (6) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Chen, Yaxuan(haohui202101@163.com)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICECC 2022 - Proceedings of the 5th International Conference on Electronics, Communications and Control Engineering
Issue date:March 25, 2022
Publication year:2022
Pages:16-21
Language:English
ISBN-13:9781450395847
Document type:Conference article (CA)
Conference name:5th International Conference on Electronics, Communications and Control Engineering, ICECC 2022
Conference date:March 25, 2022 - March 27, 2022
Conference location:Virtual, Online, Japan
Conference code:180813
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Enterprise valuation is the evaluation of an enterprise's value, which is the focus of research in the financial field. In recent years, with the establishment of China's science and innovation board stock market, enterprise valuation has once again become a hot research topic. Accurate enterprise valuation model has important economic significance for enterprise listing and securities investment. However, the existing valuation methods mainly evaluate the enterprise value through the accounting of some economic indicators. The index information designed in this kind of method is difficult to obtain and is not suitable for investors. How to use the fundamental data and liquidity index data of enterprises to accurately predict the market sales rate plays an important role. Firstly, through the multiple linear regression model, this paper analyzes the prediction of market sales rate, analyzes and summarizes the problems existing in the multiple linear regression model. Secondly, through nonlinear transformation and time series index, an effective market sales rate prediction model is established. Finally, through the prediction and analysis of listed enterprises in China's A-share market, the goodness of the model is successfully improved, which fully verifies the effectiveness of our proposed method.<br/></div> © 2022 ACM.
Number of references:13
Main heading:Multiple linear regression
Controlled terms:Commerce - Forecasting - Investments - Sales
Uncontrolled terms:Analysis method - Enterprise values - Focus of researches - Market sales - Market-sale ratio - Multiple linear regression models - Multiple linear regressions - Prediction methods - Science and innovation - Valuation level analyse
Classification code:922.2 Mathematical Statistics
DOI:10.1145/3531028.3531031
Funding details: Number: 2020KF0059, Acronym: WUT, Sponsor: Wuhan University of Technology;
Funding text:This work was supported in part by Sanya Science and Education Innovation Park of Wuhan University of Technology (2020KF0059). We thank MindSpore for the partial support of this work, which is a new deep learning computing framework(https://www.mindspore. cn/).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 404>
Accession number:20223812778771
Title:Encoding and decoding communications based on perfect vector optical vortex arrays
Authors:Long, Zixu (1, 2); Hu, Huajie (1); Ma, Xin (1, 2); Tai, Yuping (3); Li, Xinzhong (1, 2)
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang; 471023, China
Corresponding author:Li, Xinzhong(xzli@haust.edu.cn)
Source title:Journal of Physics D: Applied Physics
Abbreviated source title:J Phys D
Volume:55
Issue:43
Issue date:October 27, 2022
Publication year:2022
Article number:435105
Language:English
ISSN:00223727
E-ISSN:13616463
CODEN:JPAPBE
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">We proposed the perfect vector optical vortex arrays (PVOVAs) for encoding and decoding communications, including the 2 × 2, 1 × 4, 4 × 4, and 2 × 4 array forms, which were generated with the coaxial superposition of two vector optical vortex arrays with left- and right-handed circular polarization. The polarization order and state of each vector element could be modulated independently by adjusting the corresponding topological charges and additional phases, θ<inf>n</inf> . By attaching code information to these vector elements with different states of polarization, the hexadecimal code elements, including 0 to F, were represented. Therefore, PVOVAs consisting of multiple vector elements can transmit encoding information and be decoded as original information in the receiving end. The school badge grayscale image, with a size of 64 × 64 pixels, was transmitted using the encoding and decoding communication via PVOVAs, and the received restored image had a reliable accuracy. This study proves PVOVAs have flexible spatial structure and controllable states of polarization, and it expands the application of vector optical fields in optical encoding and decoding communication.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:42
Main heading:Vectors
Controlled terms:Decoding - Encoding (symbols) - Optical communication - Polarization - Signal encoding - Vortex flow
Uncontrolled terms:Coaxial superposition - Encoding and decoding - Optical encoding - Optical encoding and decoding communication - Optical field - Optical vortex array - Optical vortices - States of polarizations - Vector optical field - Vortex arrays
Classification code:631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 723.2 Data Processing and Image Processing - 921.1 Algebra
DOI:10.1088/1361-6463/ac8d13
Funding details: Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201901, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:This work is supported by the National Natural Science Foundation of China (No. 11974102), Key Scientific Research Projects of Institutions of Higher Learning of Henan Province Education Department (No. 21zx002), and State Key Laboratory of Transient Optics and Photonics (No. SKLST201901).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 405>
Accession number:20222812338848
Title:Dual-modality quantitative phase-contrast microscopy based on pupil phase modulation (DQPCM)
Authors:Ma, Ying (1, 2); Ma, Lin (1); Liu, Min (1); Zheng, Juanjuan (1); An, Sha (1); Li, Jianlang (1); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (2) Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:522
Issue date:November 1, 2022
Publication year:2022
Article number:128685
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Phase-contrast optical microscopy that converts phase modulation of transparent samples into intensity modulation plays an indispensable role in biomedical research. In this study, we propose a dual-modality quantitative phase contrast microscopic (DQPCM) platform that integrates quantitative differential interference phase-contrast microscopy (qDIC-PCM) and quantitative Zernike phase-contrast microscopy (qZ-PCM) in the same microscopy. Both imaging modalities are realized through spatial light modulator (SLM) based pupil phase modulation, and switching between the two imaging modes is performed by rotating two polarizers. Both imaging modalities have the merits of high stability and low coherent noise due to their common path interference structure and partially coherent illumination. The experimental results indicate that qDIC-PCM is superior to qZ-PCM in quantitative phase imaging of samples with certain scattering, while qZ-PCM has higher spatial resolution than qDIC-PCM. The proposed technique will be very helpful for imaging the dynamic processes of biological samples with high spatiotemporal resolution.<br/></div> © 2022 Elsevier B.V.
Number of references:39
Main heading:Phase modulation
Controlled terms:Light modulators
Uncontrolled terms:Biological dynamics - Differential interference - Dual-modality - High spatiotemporal resolution - Interference phase contrast microscopies - Label free - Phase-contrast microscopy - Quantitative phase contrasts - Quantitative phase imaging - Spatio-temporal resolution
DOI:10.1016/j.optcom.2022.128685
Funding details: Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-184, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2022YFE0100700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QTZX22039,XJS210503,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2020A1515110590, Acronym: -, Sponsor: Basic and Applied Basic Research Foundation of Guangdong Province;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC 62105251 , 62075177 , 12104354 ); the Natural Science Foundation of Shaanxi Province, China ( 2021JQ-184 ), the Fundamental Research Funds for the Central Universities, China ( XJS210503 , XJS210504 , and QTZX22039 ), Key Research and Development Program of China ( 2022YFE0100700 ), and Guangdong Basic and Applied Basic Research Foundation, China ( 2020A1515110590 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 406>
Accession number:20230313384959
Title:Refinement method for compressive hyperspectral data cubes based on self-fusion
Authors:Zhu, Mengjun (1); Yi, Wenjun (1); Dong, Zhaohua (2); Xiong, Peng (2); Du, Junyi (2); Tang, Xingjia (3); Yang, Ying (3); Li, Libo (3); Qi, Junli (1); Liu, Ju (4); Li, Xiujian (1)
Author affiliation:(1) College of Liberal Arts and Sciences, National University of Defense Technology, deyaroad109, Changsha; 410073, China; (2) School of Computer Science and Technology, Xidian University, Xi’an; 710071, China; (3) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) Hunan Institute of Traffic Engineering, Hengyang; 421099, China
Corresponding author:Yi, Wenjun(yiwenjun@nudt.edu.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:39
Issue:12
Issue date:December 1, 2022
Publication year:2022
Pages:2282-2290
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Compressive hyperspectral images often suffer from various noises and artifacts, which severely degrade the imaging quality and limit subsequent applications. In this paper, we present a refinement method for compressive hyperspectral data cubes based on self-fusion of the raw data cubes, which can effectively reduce various noises and improve the spatial and spectral details of the data cubes. To verify the universality, flexibility, and extensibility of the self-fusion refinement (SFR) method, a series of specific simulations and practical experiments were conducted, and SFR processing was performed through different fusion algorithms. The visual and quantitative assessments of the results demonstrate that, in terms of noise reduction and spatial–spectral detail restoration, the SFR method generally is much better than other typical denoising methods for hyperspectral data cubes. The results also indicate that the denoising effects of SFR greatly depend on the fusion algorithm used, and SFR implemented by joint bilateral filtering (JBF) performs better than SRF by guided filtering (GF) or a Markov random field (MRF). The proposed SFR method can significantly improve the quality of a compressive hyperspectral data cube in terms of noise reduction, artifact removal, and spatial and spectral detail improvement, which will further benefit subsequent hyperspectral applications.<br/></div> © 2022 Optica Publishing Group.
Number of references:50
Main heading:Markov processes
Controlled terms:Geometry - Hyperspectral imaging - Magnetorheological fluids - Noise abatement
Uncontrolled terms:Data cube - De-noising - Denoising methods - Fusion algorithms - HyperSpectral - Hyperspectral Data - Imaging quality - Quantitative assessments - Refinement methods - Visual assessments
Classification code:708.4 Magnetic Materials - 746 Imaging Techniques - 751.4 Acoustic Noise - 921 Mathematics - 922.1 Probability Theory
DOI:10.1364/JOSAA.465165
Funding details: Number: 11704411,62005207,62005317, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JJ40341,2021JJ40695, Acronym: -, Sponsor: Natural Science Foundation of Hunan Province;Number: 2020YFA0713504, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (11704411, 62005207, 62005317); Natural Science Foundation of Hunan Province (2019JJ40341, 2021JJ40695); National Key Research and Development Program of China (NKRDPC 2020YFA0713504).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 407>
Accession number:20222212182743
Title:Large-field structured illumination microscopy based on 2D grating and a spatial light modulator
Authors:Wen, Kai (1, 2); Fang, Xiang (1); Ma, Ying (1); Liu, Min (1); An, Sha (1); Zheng, JuanJuan (1, 3); Kozacki, Tomasz (2); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi’an; 710071, China; (2) Department of Mechatronics, Institute of Micromechanics and Photonics, Warsaw University of Technology, Warsaw; 02-525, Poland; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:11
Issue date:June 1, 2022
Publication year:2022
Pages:2666-2669
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Structured illumination microscopy (SIM) has been widely used in biological research due to its merits of fast imaging speed, minimal invasiveness, super-resolution, and optical sectioning imaging capability. However, the conventional SIM that uses a spatial light modulator (SLM) for fringe projection often has a limited imaging field of view. Herein, we report a large-field SIM technique that combines a 2D grating for fringe pattern projection and an SLM for selecting fringe orientation and performing phase shifting digitally. The proposed SIM technique breaks the bottleneck of fringe number limited by the digital projection devices, while maintaining the advantage of high-speed (digital) phase shifting of conventional SIM. The method avoids the pixilation and dispersion effects of the SLMs. Finally, a 1.8-fold resolution enhancement in a large field of 690 × 517 µm<sup>2</sup> under a 20×/NA0.75 objective is experimentally demonstrated. The proposed technique can be widely applied to biology, chemistry, and industry.<br/></div> © 2022 Optica Publishing Group
Number of references:16
Main heading:Light modulators
Controlled terms:Digital devices - Interferometry - Light modulation
Uncontrolled terms:2D grating - Biological research - Fast imaging - Imaging speed - Invasiveness - Larger fields - Microscopy technique - Spatial light modulators - Structured illumination - Superresolution
Classification code:741.1 Light/Optics - 941.4 Optical Variables Measurements
DOI:10.1364/OL.460292
Funding details: Number: 12104354,2021-2022,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021YFF0700303, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2021YFF0700303); National Natural Science Foundation of China (12104354, 62075177, 62105251); Exchange Program Between China and Poland(2021-2022); China Scholarship Council; Open Research Fund of State Key Laboratory of Transient Optics and Photonics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 408>
Accession number:20220123002
Title:The complex Maxwell stress tensor theorem: The imaginary stress tensor and the reactive strength of orbital momentum. A novel scenery underlying optical forces
Authors:Nieto-Vesperinas, Manuel (1); Xu, Xiaohao (2, 3)
Author affiliation:(1) Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, Madrid; 28049, Spain; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China
Corresponding author:Nieto-Vesperinas, Manuel(mnieto@icmm.csic.es)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:May 18, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">We uncover the existence of a universal phenomenon concerning the electromagnetic optical force exerted by light or other electromagnetic waves on a distribution of charges and currents in general, and of particles in particular. This conveys the appearence of underlying reactive quantities that hinder radiation pressure and currently observed time-averaged forces. This constitutes a novel paradigm of the mechanical efficiency of light on matter, and completes the landscape of the optical, and generally electromagnetic, force in photonics and classical electrodynamics; widening our understanding in the design of both illumination and particles in optical manipulation without the need of increasing the illuminating power, and thus lowering dissipation and heating. We show that this may be accomplished through the minimization of what we establish as the reactive strength of orbital (or canonical) momentum, which plays against the optical force a role analogous to that of the reactive power versus the radiation efficiency of an antenna. This long time overlooked quantity, important for current progress of optical manipulation, and that stems from the complex Maxwell theorem of conservation of complex momentum that we put forward, as well as its alternating flow associated to the imaginary part of the complex Maxwell stress tensor, conform the imaginary Lorentz force that we introduce in this work, and that like the reactive strength of orbital momentum, is antagonistic to the well-known time-averaged force; thus making this reactive Lorentz force indirectly observable near wavelengths at which the time-averaged force is lowered.<br/></div> © 2022, CC BY.
Number of references:77
Main heading:Stress tensor
Controlled terms:Antennas - Efficiency - Electromagnetic waves - Lorentz force - Momentum
Uncontrolled terms:'current - Appearence - Electromagnetics - Maxwell stress tensors - Optical force - Optical manipulation - Orbital momentum - Radiation pressure - Time-averaged
Classification code:701 Electricity and Magnetism - 711 Electromagnetic Waves - 913.1 Production Engineering - 921.1 Algebra - 931.1 Mechanics
DOI:10.48550/arXiv.2205.08984
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2205.08984v2
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 409>
Accession number:20222912369517
Title:Diagnosing temporomandibular joint disorders using second harmonic imaging of collagen fibers
Authors:Wang, Yang (1); Zhang, Jing-Ying (2); Xu, Ying (3); Chui, Hsiang-Chen (3); Han, Jiajia (4); Li, Rui (1)
Author affiliation:(1) Department of Physics, Dalian University of Technology, Liaoning, Dalian, China; (2) Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Guangdong, Dongguan, China; (3) School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Liaoning, Dalian, China; (4) Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Xi'an Jiaotong University, Shanxi, Xi'an, China
Corresponding author:Li, Rui(rli@dlut.edu.cn)
Source title:Journal of Biophotonics
Abbreviated source title:J. Biophotonics
Volume:15
Issue:10
Issue date:October 2022
Publication year:2022
Article number:e202200075
Language:English
ISSN:1864063X
E-ISSN:18640648
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">This proposed optical imaging method is a nondestructive, real-time and high-resolution approach to distinguish healthy and injured temporomandibular joint (TMJ) tissues. And the TMJ health index was invented. TMJ pathologies are commonly and reported frequently. It could be associated with the damage of collagen, cartilage and bone tissue. The second harmonic generation images could be obtained by a femtosecond laser pulses, so the aligned information of the collagen fibers in all directions for the TMJ disorders was collected. The disorder degree of collagen fibers was quantified and ranked using a fast Fourier transform (FFT) method. The TMJ health index can effectively present the TMJ healthy condition and the disorder degree of collagen fibers, a valuable objective tool for tissue characterization for TMJ healthy condition. Integrated with the staining methods, we can provide the scaling information at different injury degree.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:39
Main heading:Harmonic generation
Controlled terms:Collagen - Fast Fourier transforms - Fibers - Harmonic analysis - Joints (anatomy) - Laser pulses - Nonlinear optics - Tissue
Uncontrolled terms:Clinic diagnose - Collagen fibres - Condition - Disorder degree - Health indices - Non destructive - Optical imaging method - Second-harmonic imaging - Temporomandibular joint - Temporomandibular joint disorders
Classification code:461.2 Biological Materials and Tissue Engineering - 461.3 Biomechanics, Bionics and Biomimetics - 741.1.1 Nonlinear Optics - 744.1 Lasers, General - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.1002/jbio.202200075
Funding details: Number: 2020B1515120001, Acronym: -, Sponsor: -;Number: 4SG21019G, Acronym: -, Sponsor: -;Number: 2020ZDZX2013, Acronym: -, Sponsor: -;Number: 51803018,51972039, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: DUT19LK19,DUT20YG132, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: XLYC1902122, Acronym: -, Sponsor: Liaoning Revitalization Talents Program;
Funding text:The Fundamental Research Funds for the Central Universities of China, Grant/Award Numbers: DUT19LK19, DUT20YG132; Liaoning Revitalization Talents Program, Grant/Award Number: XLYC1902122; National Natural Science Foundation of China, Grant/Award Numbers: 51972039, 51803018; The study was supported by the Special funds for key areas of ordinary universities in Guangdong Province, Grant/Award Number: 2020ZDZX2013; Basic and Applied Basic Research Major Program of Guangdon Province, Grant/Award Number: 2020B1515120001; Discipline construction project of Guangdong Medical University, Grant/Award Numbers: 4SG21015G, 4SG21019G Funding informationThis work was financially supported by the National Natural Science Foundation of China (Nos. 51972039, 51803018), the Liao Ning Revitalization Talents Program (No. XLYC1902122) and the Fundamental Research Funds for the Central Universities of China (Grant No. DUT19LK19 and DUT20YG132). The study was supported by the Special funds for key areas of ordinary universities in Guangdong Province (2020ZDZX2013), the Basic and Applied Basic Research Major Program of Guangdon Province (2020B1515120001), and Discipline construction project of Guangdong Medical University (4SG21015G, 4SG21019G).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 410>
Accession number:20221812043222
Title:Reflectional quantitative phase-contrast microscopy (RQPCM) with annular epi-illumination
Authors:Ma, Ying (1, 2); Wang, Yang (1); Ma, Lin (1); Zheng, Juanjuan (1); Liu, Min (1); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (2) Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei; 230026, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:13
Issue date:May 1, 2022
Publication year:2022
Pages:3641-3647
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Quantitative phase microscopy (QPM) is a label-free microscopic technique that exploits the phase of a wave passing through a sample; hence, it has been applied to many fields, including biomedical research and industrial inspection.However, the high spatiotemporal resolution imaging of reflective samples still challenges conventional transmissionQPM.In this paper,we propose reflectional quantitative phase-contrast microscopy based on annular epi-illumination of light-emitting diodes. The unscattered wave from the sample is successively phase-retarded by 0, π/2, π, and 3π/2 through a spatial light modulator, and high-resolution phase-contrast images are obtained, revealing the finer structure or three-dimensional tomography of reflective samples. With this system, we have quantitatively obtained the contour of tissue slices and silicon semiconductor wafers.We believe that the proposed system will be very helpful for the high-resolution imaging of industrial devices and biomedical dynamics.<br/></div> © 2022 Optica Publishing Group.
Number of references:40
Main heading:Light modulators
Controlled terms:Industrial research - Silicon wafers
Uncontrolled terms:Biomedical research - Epi-illumination - Industrial inspections - Label free - Microscopic techniques - Phase-contrast microscopy - Quantitative phase contrasts - Quantitative phase microscopies - Resolution imaging - Spatio-temporal resolution
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 901.3 Engineering Research - 912.1 Industrial Engineering
DOI:10.1364/AO.451761
Funding details: Number: 2020A1515110590, Acronym: -, Sponsor: -;Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-184, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2021YFF0700300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: JC2112,XJS210503,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Natural Science Foundation of China (62105251, 62075177, 12104354); National Key Research and Development Program of China (2021YFF0700300); Natural Science Foundation of Shaanxi Province (2021JQ-184); Fundamental Research Funds for the Central Universities (JC2112, XJS210503, XJS210504); Basic and Applied Basic Research Foundation of Guangdong Province (2020A1515110590).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 411>
Accession number:20224513074550
Title:Broadband Fiber Chirped-pulse Amplification System Based on Parabolic Evolution
Title of translation:基于抛物线演化的宽光谱光纤啁啾脉冲放大系统
Authors:Du, Li (1); Jin, Cuihong (1); Yang, Zhi (2); Cui, Yudong (1, 3)
Author affiliation:(1) State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou; 310027, China; (2) Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an; 710119, China; (3) Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China
Corresponding author:Cui, Yudong(cuiyd@zju.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1114002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Fiber lasers have attracted substantial research interest due to their high stability， excellent beam quality and system compactness. Furthermore， lasers generating high-energy ultrafast pulses and operating at the 1 550 nm region are widely developed due to the low optical attenuation at the first communication window and more cost-effective than other laser sources in a variety of applications such as ultrafast spectroscopy， precision material processing and terahertz-wave generation. To achieve high-energy pulses， an Erbium-doped fiber amplifier was employed to amplify seed pulses. However， pulses will accumulate large nonlinear effects such as Self-Phase Modulation （SPM） and Stimulated Raman Scattering （SRS） during direct amplification， thus degrading the pulse quality. One common solution is to widen the pulse width by introducing a chirp before amplification. The peak power intensity is significantly attenuated， avoiding excessive nonlinearity. The amplified pulse is then de-chirped by a compressor. This method is called chirped pulse amplification （CPA）. Several high-power CPA systems operating at 1.56 μm have been demonstrated in recent years. However， all of these sources produced a pulse with spectral width between 5 nm and 15 nm. Broadband fiber laser plays an important role in optical frequency combs， optical coherent tomography， optical coherence radar and fiber optical sensing systems. There is a lack of high-energy devices capable of generating pulses with spectral width above 30 nm. Several approaches have been utilized to generate broadband pulses. A noise-like mode-locked fiber laser was demonstrated based on the precise adjustment of intracavity dispersion. However， this laser regime was seldom applied in ultrashort pulses due to its incompressibility. A Mamyshev oscillator is able to generate broadband pulses as shorter than 100 fs at the expense of complicated intracavity structure and accurate pulse evolution. The extra-cavity generation method relies on Highly Nonlinear Fibers （HNLFs）， such as photonic crystal fibers， whose complexity of design is increased by demanding careful selection of parameters for the seed pulse. In addition， the nonlinear effect induced by SPM generates a nonlinear chirp on both sides of pulses which degrades the beam quality in CPA systems. Note that self-similar pulses are nonlinear optical structures whose amplitudes and widths could be altered by dispersion， nonlinearity， gain and other system parameters， while maintaining the overall shapes. Since the self-similar pulse has a strict linear frequency chirp induced by the balance between SPM and normal group velocity dispersion in the erbium-doped fiber， it could be effectively compressed by grating pairs to obtain a high-power ultrashort pulse. Therefore， the combination of self-similar amplification and CPA is a promising solution to generating broadband watt-level pulse. High-energy ultrafast pulses based on parabolic evolution in ytterbium-doped lasers have been reported. Nevertheless， the Erbium-Doped Fiber Amplifier （EDFA） based on self-similar amplification operates at an anomalous dispersion region， which is less applicable to generating pulses with the average power above watt-level high-energy pulses comparing to Ytterbium-Doped Fiber Amplifier （YDFA）. At the same time， high-energy CPA systems operating at 1 550 nm significantly lag behind Yb-doped lasers due to high quantum defect， thermal effects and nonlinearity. At present， there is no report on a broadband high-energy CPA system based on parabolic evolution operating at 1 550 nm. Here， we demonstrated an all-fiber Er-doped chirped-pulse amplification laser， which generates Watt-level broadband pulse with the application of self-similar amplification. Numerical simulations of the model laser were performed by following the propagation of the pulses and considering every action of cavity components on the pulses. We use the results of one round-trip circulation as the input of the next round of calculation until the optical field becomes self-consistent. For this context， pulse propagation equation is given by the nonlinear Schrodinger equation. The parameters of each element of the laser are optimized according to theoretical simulations. In our experiment， the seed source is a dispersion-managed passively mode-locked fiber laser with a Gaussian-spectral profile， which evolves into a parabolic shape after self-similar amplification， achieving a broadband pulse bandwidth with the full-width at a half-maximum of 44.8 nm under 400 mW pump power. The spectral width and energy of the pulse increase rapidly during amplification. The pulses are stretched in Dispersion Compensating Fiber （DCF） to reduce peak power， avoiding excessive nonlinearity. Then a Double-Clad Er/Yb co-Doped Fiber （DC-EYDF） is used as the main amplifier. The spectral width of the pulse is narrowed down to 30 nm with the effect of gain filtering during amplification. The pulse is amplified to 1.3 W with the pump power of 9 W. The amplifier delivers 32 nJ pulses at a repetition rate of 40.1 MHz， which can be compressed down to 587 fs through a pair of transmission gratings. We believe that the narrower pulses could be achieved by switching to fiber Bragg gratings to adjust the dispersion between the stretchers and compressors precisely. The robust， broadband， and watt-level 1 550 nm fiber laser source can be used for nonlinear frequency conversion， solar cell micromachining and ophthalmology due to its compact size.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:25
Main heading:Ultrashort pulses
Controlled terms:Amplification - Chirp modulation - Cost effectiveness - Dispersion (waves) - Erbium doped fiber amplifiers - Fiber lasers - Nonlinear optics - Photonic crystal fibers - Self phase modulation - Structure (composition) - Terahertz waves - Ytterbium
Uncontrolled terms:Broad spectrum - Broadband pulse - Chirped-pulse-amplification - Energy - Erbium- doped fibers - Erbium-ytterbium co-doped fibers - Parabolics - Self-similar amplifications - Spectral widths - Watt levels
Classification code:547.2 Rare Earth Metals - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television - 741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.4 Solid State Lasers - 744.7 Laser Components - 911.2 Industrial Economics - 951 Materials Science
Numerical data indexing:Energy 3.20E-08J, Frequency 4.01E+07Hz, Power 1.30E+00W, Power 4.00E-01W, Power 9.00E+00W, Size 1.56E-06m, Size 3.00E-08m, Size 4.48E-08m, Size 5.00E-09m to 1.50E-08m, Size 5.50E-07m, Time 1.00E-13s, Time 5.87E-13s
DOI:10.3788/gzxb20225111.1114002
Funding details: Number: -, Acronym: ZJNSF, Sponsor: Natural Science Foundation of Zhejiang Province;Number: 2020WNLOKF008, Acronym: WNLO, Sponsor: Wuhan National Laboratory for Optoelectronics;
Funding text:Natural Science Foundation of Zhejiang Province （No.LGG20F050002）， Open Project Program of Wuhan National Laboratory for Optoelectronics （No. 2020WNLOKF008）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 412>
Accession number:20223712734072
Title:Secondary electron emission of Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms fabricated by atomic layer deposition
Title of translation:基于原子层沉积的氧化铝和氧化镁纳米薄膜二次电子发射特性
Authors:Zhu, Xiangping (1, 2); Wang, Dan (3); Wang, Hui (4, 5); Zhou, Rundong (1, 2); Li, Xiangxin (1); Hong, Yunfan (1); Jin, Chuan (1); Wei, Yonglin (1); Luo, Chaopeng (4, 5); Zhao, Wei (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Microelectronics, Xi’an Jiaotong University, Xi’an; 710049, China; (4) Science and Technology on Near-Surface Detection Laboratory, Wuxi; 214035, China; (5) The Fifth Institute of Army Academy, Wuxi; 214035, China
Corresponding authors:Zhu, Xiangping(xpzhu@opt.ac.cn); Zhao, Wei(weiz@opt.ac.cn)
Source title:Kexue Tongbao/Chinese Science Bulletin
Abbreviated source title:Kexue Tongbao/Chin. Sc. Bull.
Volume:67
Issue:23
Issue date:2022
Publication year:2022
Pages:2811-2820
Language:Chinese
ISSN:0023074X
E-ISSN:20959419
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Electron multiplier devices are widely applied in many electronic instruments like mass spectrometers and atomic clocks. It is considerably crucial for a multiplier to possess a high electron gain, and this index can be directly determined by secondary electron yield (SEY) of the dynodes. Al<inf>2</inf>O<inf>3</inf> and MgO possess a relatively high SEY level among majority of dynode materials, and their film products are excellent dynode candidates. Whereas, for some multipliers like microchannel plate (MCP), only an ultrathin film of several nanometers is allowed to be coated onto the inner wall of the micro channels to avoid the variation of the channel diameter. Therefore, SEY characteristics of the ultrathin films are necessary to be figured out. Here, by using the technology of atomic layer deposition, 7 groups of ultrathin Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms with increase thickness (1, 3, 5, 7, 10, 30, and 50 nm) are fabricated on silicon (Si) substrates. As well as, 5 groups of Al<inf>2</inf>O<inf>3</inf> nanofilms (1, 2, 3, 4, and 20 nm) are deposited on MgO film (20 nm) substrate. Surface composition, morphology, film thickness, and SEY have been characterized in detail. Via the experiments, it is found that SEY of the Al<inf>2</inf>O<inf>3</inf>/Si and MgO/Si samples largely depends on the film thickness, namely, SEY increases obviously as the film thickness rises, meanwhile, the increment of SEY decreases gradually. The SEY tendency indicates that the effect of top film on SEY becomes enhanced, and the influence of bottom substrate on SEY becomes weakened. When the film thickness increases beyond 30 nm, SEY increment approaches to 0, and SEY tends to be saturated. This phenomenon demonstrates that the penetration depth of incident electrons is less than the film thickness under the circumstances. To interpret the experimental results, the SEE semi-physical theory developed for double layer structures is utilized. The calculation results indicate that the film thickness has a remarkable impact on SEY, especially when the incident energy becomes lower and the film becomes thicker, the results also reveal that the dielectric surface film possesses a great ability to modulate the surface SEY. However, SEY becomes less dependent on film thickness as the incident energy increases, and it results from the increase of penetration depth for the incident electrons. This work reveals the mechanism of the SEE characteristics for ultrathin Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms, which is of great significance for the subsequent research on the use of nanoscale high SEY dielectric films as the SEE functional layer in electron multipliers.<br/></div> © 2022 Chinese Academy of Sciences. All rights reserved.
Number of references:39
Main heading:Alumina
Controlled terms:Aluminum oxide - Atomic layer deposition - Electrons - Film thickness - Image storage tubes - Magnesia - Morphology - Silicon - Substrates - Ultrathin films
Uncontrolled terms:Atomic-layer deposition - Double layer structure - Film-thickness - Incident electrons - Incident energy - Nano films - Secondary electron emissions - Secondary electron yield - Secondary electrons - Ultra-thin
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.1 Electron Tubes - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1.2 Crystal Growth - 951 Materials Science
Numerical data indexing:Size 2.00E-08m, Size 3.00E-08m, Size 5.00E-08m
DOI:10.1360/TB-2022-0175
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 413>
Accession number:20230813622786
Title:Laser Active Fusion Trajectory Measurement Technology in Rocket Take-off Phase
Title of translation:火 箭 起 飞 段 的 激 光 主 动 融 合 轨 迹 测 量 技 术
Authors:Shi, Heng (1, 2, 3, 4); Gao, Xin (1); Li, Xiyu (1); Lei, Chengqiang (1); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1); Sun, Rui (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi′an; 710119, China; (4) Pilot National Laboratory for Marine Science and Technology（Qingdao）, Shangdong, Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin526@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:12
Issue date:2022
Publication year:2022
Article number:1212001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The high-precision trajectory data of the rocket vertical take-off phase can be used to evaluate the technical performance and accuracy of the rocket，provide data reference for the improved design and finalization of the rocket，and also provide important trajectory reference data for the rocket take-off safety control system. The trajectory of the rocket in the vertical take-off phase changes greatly in the vertical rising direction，while the theoretical trajectory in both directions of the horizontal plane does not change. However，in the actual launch process，due to various interferences and certain delays and deviations in the real-time control of the rocket，the actual trajectory of the rocket in the horizontal plane will inevitably have a certain offset. The traditional trajectory measurement methods in the vertical take-off phase of rocket mainly include telemetry，optical and radio radar measurement. Due to the vibration caused by rocket launch，the trajectory measurement accuracy of telemetry system is not high，and it is difficult to obtain effective original analysis data after rocket failure. The optical measurement system uses images taken by multiple stations to obtain the rocket trajectory data after the rendezvous，but it is easily affected by the weather and has poor real-time performance. Due to the interference of ground clutter，it is difficult for radio radar to obtain effective trajectory data at this stage. It can be seen that there is no real-time trajectory measurement data in the vertical take-off phase of the rocket at present，and it is urgent to fill the data gap in this phase through new measurement methods.A single lidar can be used to measure the rocket trajectory in the take-off phase，but the trajectory data of the rocket in both directions of the horizontal plane in the vertical take-off phase changes very little，and only relying on a single lidar to measure the trajectory in the two directions will cause large errors. Compared with a single lidar measurement system，the field of view of the two multi-line lidars in the vertical direction can reach 25°，and a total of 128 laser scanning lines scan the rocket target area at the same time. In addition，the two lidars conduct fusion measurement at an intersection angle of 70°，which can cover the target area of the rocket with a larger angle range. Therefore，more target measurement points can be scanned，which can not only improve the fitting accuracy of the center of the ellipse ，but also effectively ensure the reliability of the data measurement. In view of the difficult technical problem of obtaining real-time high-precision trajectory data in the rocket vertical takeoff phase，a new rocket take-off phase trajectory fusion measurement system based on lidar is proposed in this paper，which has the advantages of convenient station layout，easy installation and low power consumption. At the same time，it is less affected by weather，ground clutter signals and rocket vibration，and can effectively obtain the rocket real-time trajectory data. Two lidars are installed on a two-dimensional precision turntable to form a fusion measurement system. Before the launch of the rocket，the two lidars jointly scan the middle and upper target areas of the rocket. Based on the proposed algorithm of laser point cloud data correction，the initial value solution of rocket target area trajectory and data fusion processing of the two trajectory data，the static and dynamic trajectory measurement accuracy of the lidar are calculated and analyzed to be 0.023 5 m and 0.036 6 m respectively. In the process of rocket vertical take-off，the two-dimensional precision turntable receives the trajectory data of the rocket target area in real time，guides the lidar to track and scan the whole process of the rocket vertical take-off phase with high precision according to the rocket position information，and completes the real-time and high-precision trajectory measurement of the rocket vertical take-off phase，which effectively fills the gap of the trajectory measurement data of the rocket at this stage and ensures the safety of rocket launch. Up to now，the rocket real-time trajectory measurement system based on lidar has successfully completed many test tasks in a satellite launch center. Under the conditions of vibration，tail flame and other environmental interference in the rocket take-off phase，the real-time dynamic trajectory measurement accuracy can be better than 0.05 m. It is verified that the measurement system and method proposed in this paper can effectively improve the measurement accuracy and reliability of rocket trajectory，which has important engineering application value.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:18
Main heading:Data handling
Controlled terms:Data fusion - Optical data processing - Optical radar - Radar measurement - Real time control - Rockets - Telemetering equipment - Trajectories - Vibration analysis
Uncontrolled terms:Dynamic measurement accuracy - Fusion data processing - Laser point - Laser point cloud datas - Measurement system - Point-clouds - Take off - Trajectories datum - Trajectory measurements - Vertical take-off
Classification code:654.1 Rockets and Missiles - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 731 Automatic Control Principles and Applications - 741.3 Optical Devices and Systems
Numerical data indexing:Size 5.00E+00m, Size 5.00E-02m, Size 6.00E+00m
DOI:10.3788/gzxb20225112.1212001
Funding details: Number: 2021406, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The Youth Innovation Promotion Association Chinese Academy of Sciences（No. 2021406），Key Laboratory of Space Precision Measurement Technology Chinese Academy of Sciences（No.29J21-063-Ⅲ）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 414>
Accession number:20223712709636
Title:Simulation of Mesosphere Wind Measurement with Multiple Emission Lines of the O<inf>2</inf>(0-1) Band Using Space-Based Doppler Asymmetric Spatial Heterodyne (Open Access)
Authors:Fu, Di (1, 2); Zhao, Hengxiang (1); Li, Juan (1); Wu, Kuijun (3); Chang, Chenguang (1, 2); Bai, Lu (4); Feng, Yutao (1); Liu, Xuebin (1)
Author affiliation:(1) Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Optic-Electronic Information Science and Technology, Yantai University, Yantai; 264005, China; (4) School of Physics, Xidian University, Xi’an; 710071, China
Corresponding authors:Feng, Yutao(fytciom@opt.ac.cn); Liu, Xuebin(lxb@opt.ac.cn)
Source title:Atmosphere
Abbreviated source title:Atmosphere
Volume:13
Issue:8
Issue date:August 2022
Publication year:2022
Article number:1309
Language:English
E-ISSN:20734433
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">For space-based atmospheric wind measurements, full-link simulation is critical for the optimization of the instrument indicators and the evaluation of the measurements’ performance. This paper presents observation simulations and error verification of the mesosphere wind measurement with four emission lines of the O<inf>2</inf>(0-1) band by using the space-based Doppler Asymmetric Spatial Heterodyne (DASH), named the Mesosphere Wind Image Interferometer (MWII). The passive wind measurement principle and the DASH concept are first described. The full-link simulation consists of radiation simulation, the instrument forward model, and the wind retrieval model. The four emission lines at about 866.5 nm of the O<inf>2</inf>(0-1) band were selected as the observation targets. The radiation characteristics of the target lines were studied and calculated, as well as the background radiation. Based on the LOS radiation integral model, a numerical simulation of the raw observation data was carried out using the instrument model. The interference fringe priority strategy and joint wind decision method were proposed to achieve multiple-emission-line wind retrieval with higher precision. In the simulation, multiple-line retrieval could improve the precision by more than 30% compared to single-line retrieval under the same conditions. The error simulation indicated that the wind profile precision was 3–9 m/s in the altitude range of 50–110 km, with an average accuracy of about 1 m/s, proving that the scheme of MWII has good altitude coverage of the whole mesosphere and a part of the lower thermosphere.<br/></div> © 2022 by the authors.
Number of references:35
Main heading:Errors
Controlled terms:Electromagnetic wave emission - Heterodyning - Ionosphere
Uncontrolled terms:Dopple asymmetric spatial heterodyne - Doppler - Emission lines - Line measurements - Mesosphere - Multiple emission line measurement - Observation simulation - Space-based - Space-based wind measurement - Spatial heterodyne - Wind measurement
Classification code:443.1 Atmospheric Properties - 711 Electromagnetic Waves
Numerical data indexing:Percentage 3.00E+01%, Size 5.00E+04m to 1.10E+05m, Size 8.665E-07m, Velocity 1.00E00m/s, Velocity 3.00E+00m/s to 9.00E+00m/s
DOI:10.3390/atmos13081309
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB 2016A07, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931,E1294301, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research was funded by the National Natural Science Foundation of China (Grant No. 41005019), West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB 2016A07), Natural Science Basic Research Program of Shaanxi Province (Grant No. 2019JQ-931), and the West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (Grant No. E1294301).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 415>
Accession number:20230413449800
Title:Optical Design of the Transit Telescope for The Earth 2.0 Mission
Authors:Zhou, Dan (1); Zhang, Congcong (1); Ge, Jian (1); Zhang, Hui (1); Zhang, Yongshuai (1); Yu, Yong (1); Chen, Yonghe (2); Liu, Xiaohua (2); Song, Zongxi (3); Gao, Wei (3); Zhang, Hongfei (4); Wang, Jian (4)
Author affiliation:(1) Shanghai Astronomical Observatory, Chinese Academy of Sciences, Nandan Road 80, Shanghai; 200030, China; (2) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Yutian Road 500, Shanghai; 200083, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xinxi Road 17, Shaanxi, Xi'an, China; (4) Department of Modern Physics, University of Science and Technology of China, Jinzhai Road 96, Anhui, Hefei, China
Corresponding author:Zhou, Dan(dzhou@shao.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:1218018
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese next-generation space mission aiming at detecting thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth's 2.0s), cold low-mass planets, and free-floating planets. The ET mission will use six 300 mm diameter wide field telescope arrays to continuously monitor 1.2 million FGKM dwarf stars in the original Kepler field and its adjacent regions for four consecutive years to search for new planets including Earth 2.0s using the transit technique. The six telescopes have the same configuration, point to the same sky area, and constitute the main scientific payload. Each telescope has an effective aperture of 300 mm with a very wide field of view (FOV) of 500 square degrees and a wavelength coverage of 450-900 nm. Each telescope is equipped with a focal plane mosaic camera. The mosaic camera is composed of 2×2, 9k×9k CMOS detectors with pixel size of 10µm. The optical design results in the diameter of the 90% encircled energy (EE90%) less than 40µm (or 4 pixels) over the entire FOV. About 20% vignetting at the edge of the FOV is introduced to provide good throughput for the entire FOV while keeping optics size and weight down to reduce manufacturing risk and scientific payload within the mass and volume limit. In this paper, we will present the optical design details, including influence analysis of various factors on image quality, e.g., glass material, detector flatness, manufacturing and assembly tolerances. In addition, we will describe temperature stability analysis of the telescope on image quality and photometry measurements.<br/></div> © 2022 SPIE.
Number of references:3
Main heading:Earth (planet)
Controlled terms:Cameras - Glass - Image analysis - Optical design - Orbits - Pixels - Quality control - Stars - Telescopes
Uncontrolled terms:Earth-like planets - Ee90% - Field of views - Free-floating planets - Low-mass - Scientific payloads - Solar type stars - Space missions - Transit - Wide-field
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 742.2 Photographic Equipment - 812.3 Glass - 913.3 Quality Assurance and Control
Numerical data indexing:Percentage 2.00E+01%, Percentage 9.00E+01%, Size 3.00E-01m, Size 4.50E-07m to 9.00E-07m, Time 2.00E+00s
DOI:10.1117/12.2630673
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600.
Database:Compendex
Title:Single Space Object Image Denoising and Super Resolution Reconstructing based on Unpaired images
Authors:Chen, Errui (1); Feng, Xubin (1, 2)
Author affiliation:(1) Photoelectric Tracking Space Precision Measurement Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Jt. Lab. for Ocean Observation and Detection(Xi'an Institute of Optics and Precision Mechanics), Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
Corresponding author:Feng, Xubin(fengxubin@opt.ac.cn)
Source title:IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)
Abbreviated source title:ITAIC - IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf.
Volume:2022-June
Part number:1 of 1
Issue title:IEEE 10th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2022
Issue date:2022
Publication year:2022
Pages:1572-1576
Language:English
ISSN:26932865
ISBN-13:9781665422079
Document type:Conference article (CA)
Conference name:10th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2022
Conference date:June 17, 2022 - June 19, 2022
Conference location:Chongqing, China
Conference code:181640
Sponsor:Chengdu Global Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section; IEEE Harbin Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">High quality space target image is of great significance for space attack and defense because space exploration missions are becoming more and more important. But high quality images of space object are difficult to obtain due to the large number of cosmic rays in the space environment, as well as the limitations of optical lenses, detectors and transmission links on satellites. Image denoising and super-resolution reconstruction are the most economical and effective methods to solve this problem. This paper presents an unpaired denoising and super-resolution reconstruction method for optical remote sensing images which could obtain the images has higher quality than dataset itself. In order to further improve the quality of optical remote sensing images, high quality natural images are added into the training set, and unpaired image data sets (natural images and optical remote sensing images belong to different fields and cannot correspond one to one) are adopted to complete the training of the whole network by using the idea of unsupervised learning. Through the verification tests of three optical remote sensing image data sets, it can be seen that the method in this paper has reconstructed high quality optical remote sensing images with higher resolution than the dataset itself.<br/></div> © 2022 IEEE.
Number of references:15
Main heading:Optical remote sensing
Controlled terms:Cosmology - Image enhancement - Image reconstruction - Lenses - Optical resolving power - Space optics - Space research - Statistical tests
Uncontrolled terms:Component - Dual cycle - Generative adversiral network - High quality - Optical remote sensing - Remote sensing images - Space object image - Space objects - Super-resolution reconstruction - Unpaired
Classification code:656.1 Space Flight - 656.2 Space Research - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics
DOI:10.1109/ITAIC54216.2022.9836590
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 333>
Accession number:20231513873914
Title:A Review of the Research on the Measurement Methods of the Sub-reflector of Large Aperture Radio Telescopes
Authors:Qiao, Jiang (1, 2); Lin, Shangmin (1, 2); Wang, Hu (1, 2); Jin, Yu (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Shanxi Province, Xi'an City, China; (2) University of Chinese Academy of Sciences, Beijing City; 100049, China
Corresponding author:Wang, Hu(wanghu@opt.ac.cn)
Source title:2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation, APCAP 2022 - Proceedings
Abbreviated source title:IEEE Asia-Pacific Conf. Antennas Propag., APCAP - Proc.
Part number:1 of 1
Issue title:2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation, APCAP 2022 - Proceedings
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665489546
Document type:Conference article (CA)
Conference name:10th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2022
Conference date:November 4, 2022 - November 7, 2022
Conference location:Xiamen, China
Conference code:187485
Sponsor:Foshan Lambda Technology Co.,Ltd; Rohde and Schwarz (China) Technology Co.,Ltd; Techwave Communications Inc.; TMY Technology Inc. (TMYTEK)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">As an important electromagnetic wave signal receiving and transmitting equipment, antenna reflector is widely used in radar, communication and astronomical observation and other fields. The positional accuracy of the sub-reflector of a large aperture radio telescope is a key indicator that affects the receiving performance. This paper briefly expounds the principles and characteristics of various position measurement methods, and summarizes the main advantages and limitations of various technical solutions, providing a reference for the exploration and innovation of position and attitude measurement methods for radio telescope sub-reflectors.<br/></div> © 2022 IEEE.
Number of references:12
Main heading:Radio telescopes
Controlled terms:Antennas - Reflection
Uncontrolled terms:Large aperture - Measurement methods - Position - Radar communication - Radar observations - Signal receiving - Signal transmitting - Sub-reflectors - Transmitting equipments - Wave signal
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 716.3 Radio Systems and Equipment
DOI:10.1109/APCAP56600.2022.10069990
Funding details: Number: 11803075, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding:This study is supported by National Key Research and Development Program of China [grant number 2021YFC2203501] and National Natural Science Foundation of China (NSFC) [grant number 11803075].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 334>
Accession number:20230413449649
Title:Design of subpixel response characterization measurements for the Earth 2.0 Mission
Authors:Li, Yan (1); Wang, Chaoyan (1); Zhang, Hui (1); Zhang, Yongshuai (1); Tang, Zhenghong (1); Ge, Jian (1); Zhang, Hongfei (2); Wang, Jian (2); Song, Zongxi (3); Gao, Wei (3)
Author affiliation:(1) Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, China; (2) Univ. of Science and Technology of China, Address, Hefei, China; (3) Xi'an Institute of Optics and Precision Mechanics, Address, Xi'an, China
Corresponding author:Li, Yan(liyan@shao.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:121804D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese space mission designed to detect thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth 2.0s), cold low-mass planets, and free-floating planets. Six 30cm telescopes are used for very high precision photometry measurements to detect transiting planets. In order to reach very high precision photometry, an intra-pixel response function (IPRF) of detectors needs to be measured for the ET design to keep image motions caused by spacecraft operation within an acceptable level. To characterize detectors, two setups have been developed in the lab to measure spot size of the characterization beam and subpixel sensitivity. Early characterization results are reported.<br/></div> © 2022 SPIE.
Number of references:7
Main heading:Earth (planet)
Controlled terms:CMOS integrated circuits - Integrated circuit design - Orbits - Photometry - Pixels
Uncontrolled terms:Characterization measurement - CMOS - Earth-like planets - Exo-planets - High-precision - Response - Solar type stars - Space missions - Spot scan - Sub-pixels
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 941.4 Optical Variables Measurements
Numerical data indexing:Size 3.00E-01m, Time 2.00E+00s
DOI:10.1117/12.2630626
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This project is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600 and the Center for Astronomical Mega-Science, Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 335>
Accession number:20222212170262
Title:Multi-Level Alignment Network for Cross-Domain Ship Detection (Open Access)
Authors:Xu, Chujie (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(zhengxiangtao@opt.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:10
Issue date:May-2 2022
Publication year:2022
Article number:2389
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Ship detection is an important research topic in the field of remote sensing. Compared with optical detection methods, Synthetic Aperture Radar (SAR) ship detection can penetrate clouds to detect hidden ships in all-day and all-weather. Currently, the state-of-the-art methods exploit convolutional neural networks to train ship detectors, which require a considerable labeled dataset. However, it is difficult to label the SAR images because of expensive labor and well-trained experts. To address the above limitations, this paper explores a cross-domain ship detection task, which adapts the detector from labeled optical images to unlabeled SAR images. There is a significant visual difference between SAR images and optical images. To achieve cross-domain detection, the multi-level alignment network, which includes image-level, convolution-level, and instance-level, is proposed to reduce the large domain shift. First, image-level alignment exploits generative adversarial networks to generate SAR images from the optical images. Then, the generated SAR images and the real SAR images are used to train the detector. To further minimize domain distribution shift, the detector integrates convolution-level alignment and instance-level alignment. Convolution-level alignment trains the domain classifier on each activation of the convolutional features, which minimizes the domain distance to learn domain-invariant features. Instance-level alignment reduces domain distribution shift on the features extracted from the region proposals. The entire multi-level alignment network is trained end-to-end and its effectiveness is proved on multiple cross-domain ship detection datasets.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland. otv.
Number of references:55
Main heading:Synthetic aperture radar
Controlled terms:Geometrical optics - Convolutional neural networks - Generative adversarial networks - Radar imaging - Ships - Tracking radar - Convolution - Optical remote sensing - Space-based radar
Uncontrolled terms:Convolutional neural network - Cross-domain - Domain adaptation - Domain distribution - Multilevels - Optical image - Remote-sensing - Research topics - Ship detection - Synthetic aperture radar images
Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 723.4 Artificial Intelligence - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.3390/rs14102389
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 2022JQ-693, Acronym: -, Sponsor: -;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:Funding: This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Shaanxi Natural Science Basic Research Program 2022JQ-693.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 336>
Accession number:20224613118982
Title:Research on Micro-vibration Suppression Algorithm Based on RBF Neural Network
Authors:Wang, Yuanyuan (1, 2); Wang, Chen (1); Han, Junfeng (1); Tian, Hua (1, 2)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Chen(wangchen@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12343
Part number:1 of 1
Issue title:2nd International Conference on Laser, Optics and Optoelectronic Technology, LOPET 2022
Issue date:2022
Publication year:2022
Article number:123432Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510657588
Document type:Conference article (CA)
Conference name:2nd International Conference on Laser, Optics and Optoelectronic Technology, LOPET 2022
Conference date:May 20, 2022 - May 22, 2022
Conference location:Qingdao, China
Conference code:183644
Sponsor:Academic Exchange Information Center (AEIC)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the inter-satellite laser communication, a reliable communication link requires the boresight tracking accuracy between the optical transceivers to be sub-micro radians, and the control error caused by the vibration of the satellite platform is the most important factor affecting the optical communication link. The vibration and the effect of the adopted suppression scheme largely determine the tracking accuracy of the PAT system. Therefore, the impact of reducing the vibration on the optical communication link is a prerequisite for establishing stable satellite optical communication links. This paper uses the active compensation of the satellite platform vibration as the research direction, and proposes a composite control micro-vibration suppression algorithm based on the RBF neural network. On the basis of traditional PID control, adaptive RBF neural network feedforward control and PID control combination constitute composite control, design and establishing satellite platform vibration suppression system, simulation verifies the performance of traditional PID control and RBF composite control algorithm, result indicates that the RBF composite control algorithm has increased by 80% compared to traditional PID control.<br/></div> © 2022 SPIE.
Number of references:15
Main heading:Three term control systems
Controlled terms:Adaptive control systems - Optical communication - Optical links - Radial basis function networks - Satellite links - Satellites - Simulation platform
Uncontrolled terms:Composite control - Microvibrations - Optical communication links - Platform vibrations - RBF Neural Network - Satellite platform vibration - Satellite platforms - Suppression algorithm - Tracking accuracy - Vibration suppression
Classification code:655.2 Satellites - 655.2.1 Communication Satellites - 717.1 Optical Communication Systems - 723.5 Computer Applications - 731.1 Control Systems
Numerical data indexing:Percentage 8.00E+01%
DOI:10.1117/12.2648243
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 337>
Accession number:20223712737101
Title:Two-dimensional single-lobe Si photonic optical phased array with minimal antennas using a non-uniform large spacing array design
Authors:Xue, Yulong (1, 2); Zhang, Qihao (1); Ren, Yangming (1, 2); Lei, Yufang (1, 2); Sun, Xiaochen (1, 2); Zhang, Lingxuan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:24
Issue date:August 20, 2022
Publication year:2022
Pages:7158-7162
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We report a two-dimensional Si photonic optical phased array (OPA) optimized for a large optical aperture with a minimal number of antennas while maintaining single-lobe far field. The OPA chip has an optical aperture of ∼200 µm by 150 µm comprising a 9 × 9 antenna array. The two-dimensional spacings between these antennas are much larger than the wavelength and are highly non-uniform optimized by the genetic deep learning algorithm. The phase of each antenna is independently tunable by a thermo-optical phase shifter. The experimental results validate the design and exhibit a 0.39<sup>◦</sup> × 0.41<sup>◦</sup> beamwidth within the 3 dB steering range of 14<sup>◦</sup> × 11<sup>◦</sup> limited by the numerical aperture of the far-field camera system. The method can be easily extended to a larger aperture for narrower beamwidth and wider steering range.<br/></div> © 2022 Optica Publishing Group.
Number of references:29
Main heading:Deep learning
Controlled terms:Antenna lobes - Antenna phased arrays
Uncontrolled terms:Array design - Beam widths - Far-field - Non-uniform - Optical aperture - Optical phased arrays - Si photonics - Thermo-optical - Tunables - Two-dimensional
Classification code:461.4 Ergonomics and Human Factors Engineering
Numerical data indexing:Decibel 3.00E+00dB
DOI:10.1364/AO.463542
Funding details: Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (12004421, 61635013, 61675231); China Postdoctoral Science Foundation (2020M673523); Natural Science Foundation of Shaanxi Province (2019JQ-447).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 338>
Accession number:20223812766902
Title:Quantitative atmospheric turbulence simulating method for laser field imaging
Authors:Cheng, Zhiyuan (1, 2); Li, Zhiguo (1, 2); Ji, Zhou (3); Xia, Aili (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, China; (2) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an, China; (3) Unversity of Chinese Academy of Sciences, Xi'an, China
Corresponding author:Cheng, Zhiyuan(lzg@opt.ac.cn)
Source title:2022 4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Abbreviated source title:Int. Conf. Intell. Control, Meas. Signal Process., ICMSP
Part number:1 of 1
Issue title:2022 4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Issue date:2022
Publication year:2022
Pages:238-242
Language:English
ISBN-13:9781665486583
Document type:Conference article (CA)
Conference name:4th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2022
Conference date:July 8, 2022 - July 10, 2022
Conference location:Hangzhou, China
Conference code:182290
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The image of space objects by optical field imaging telescope is inevitably affected by atmospheric turbulence. Because of the random variation of atmospheric turbulence, it is difficult to control and simulate atmospheric turbulence quantitatively. In order to quantitatively research and reveal the relationship between intensity of atmospheric turbulence and image quality of laser field imaging, a quantitative controlling and simulating experiment method of intensity of atmospheric turbulence is presented. On the one hand, the atmospheric scintillation effect is researched quantitatively by real-time control and adjustment of laser beam intensity; on the other hand, the atmospheric phase disturbance effect is studied quantitatively by real-time regulating of laser frequency difference. A quantitative numerical controlling and simulating platform for atmospheric turbulence was constructed. On this experimental platform, the effect of phase jitter and scintillation of atmospheric turbulence on image quality of laser field imaging is quantitatively studied. The results show that the image quality decreases seriously and the image contour cannot be identified, when the scintillation index of turbulent light intensity is greater than 0.08 and the laser beam frequency difference is greater than 50Hz. In order to improve the image quality, the effect of atmospheric turbulence should be suppressed in the subsequent image reconstruction algorithm, and imaging experiments should be carried out under weak turbulence conditions as far as possible.<br/></div> © 2022 IEEE.
Number of references:8
Main heading:Atmospheric turbulence
Controlled terms:Atmospheric thermodynamics - Image enhancement - Image quality - Image reconstruction - Jitter - Laser beams - Quality control - Real time control - Scintillation
Uncontrolled terms:Field imaging - Frequency differences - Imaging quality - Laser field imaging - Laser fields - Optical field - Quantitative simulating - Random variation - Simulating experiments - Space objects
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 731 Automatic Control Principles and Applications - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 913.3 Quality Assurance and Control
Numerical data indexing:Frequency 5.00E+01Hz
DOI:10.1109/ICMSP55950.2022.9858990
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:ACKNOWLEDGMENT The work was supported by the National Natural Science Foundation of China Grant No: 61875257 and the Natural Science Foundation of Shaanxi Province China Grant No: 2017JM6035. The research was also supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology Grant No: CXJJ-21S042.The author would like to thank Zhang Yu for technical support.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 339>
Accession number:20224112891799
Title:Using Hyperspectral Reconstruction for Multispectral Images Change Detection
Authors:Liu, Song (1, 2); Li, Haiwei (1); Zhang, Geng (1); Hu, Bingliang (1); Chen, Junyu (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology of Cas, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:2022 7th International Conference on Image, Vision and Computing, ICIVC 2022
Abbreviated source title:Int. Conf. Image, Vis. Comput., ICIVC
Part number:1 of 1
Issue title:2022 7th International Conference on Image, Vision and Computing, ICIVC 2022
Issue date:2022
Publication year:2022
Pages:183-188
Language:English
ISBN-13:9781665467346
Document type:Conference article (CA)
Conference name:7th International Conference on Image, Vision and Computing, ICIVC 2022
Conference date:July 26, 2022 - July 28, 2022
Conference location:Xi'an, China
Conference code:182902
Sponsor:IEEE; Xi�an University of Science and Technology
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, using multispectral remote sensing data to change detection has been a hot issue. However, the limited number of spectral segments cannot accurately classify ground objects, which will affect the performance of change detection. To overcome this problem, in this paper, we propose a multispectral image change detection method based on a hyperspectral reconstruction network. The original multispectral data is used to generate hyperspectral data with richer spectral information, and then the generated data is used for change detection. The whole network consists of a reconstruction network and a change detection network. Based on the input multispectral data, a small amount of hyperspectral data is used to assist the training. In addition, we design a weighted loss to balance the two subnetworks in the training stage. In the test stage, the network can automatically recover hyperspectral data from multispectral data for change detection. The experimental results on two data sets show that the hyperspectral reconstruction method can improve the accuracy of multispectral images.<br/></div> © 2022 IEEE.
Number of references:25
Main heading:Image reconstruction
Controlled terms:Change detection - Image enhancement - Remote sensing - Spectroscopy
Uncontrolled terms:Change detection - HyperSpectral - Hyperspectral Data - Hyperspectral image reconstruction - Image change detection - Images reconstruction - Multi-spectral data - Multispectral images - Multispectral remote sensing - Reconstruction networks
DOI:10.1109/ICIVC55077.2022.9886261
Funding details: Number: 42101380, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-324, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2018YFB0504900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:ACKNOWLEDGMENT This work was partly supported by the National Key R&D Program of China (2018YFB0504900), by the National Natural Science Foundation of China (No.42101380), and by the Natural Science Foundation of Shaanxi Province (youth) (2021JQ-324).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 340>
Accession number:20215111369025
Title:Cross-Attention Spectral-Spatial Network for Hyperspectral Image Classification
Authors:Yang, Kai (1, 2); Sun, Hao (1, 2); Zou, Chunbo (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Hyperspectral image (HSI) classification aims to identify categories of hyperspectral pixels. Recently, many convolutional neural networks (CNNs) have been designed to explore the spectrums and spatial information of HSI for classification. In recent CNN-based methods, 2-D or 3-D convolutions are inevitably utilized as basic operations to extract the spatial or spectral-spatial features. However, 2-D and 3-D convolutions are sensitive to the image rotation, which may result in that recent CNN-based methods are not robust to the HSI rotation. In this article, a cross-attention spectral-spatial network (CASSN) is proposed to alleviate the problem of HSI rotation. First, a cross-spectral attention component is proposed to exploit the local and global spectrums of the pixel to generate band weight for suppressing redundant bands. Second, a spectral feature extraction component is utilized to capture spectral features. Then, a cross-spatial attention component is proposed to generate spectral-spatial features from the HSI patch under the guidance of the pixel to be classified. Finally, the spectral-spatial feature is fed to a softmax classifier to obtain the category. The effectiveness of CASSN is demonstrated on three public databases.<br/></div> © 1980-2012 IEEE.
Number of references:63
Main heading:Pixels
Controlled terms:Neural networks - Classification (of information) - Convolution - Spectroscopy - Image classification
Uncontrolled terms:Convolutional neural network - Correlation - Features extraction - Hyperspectral image classification - Spatial attention - Spatial database - Spatial features - Spatial network - Spectral attention
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis
DOI:10.1109/TGRS.2021.3133582
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015, and in part by the Key Research and Development Program of Shaanxi under Grant 2020ZDLGY04-03.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 341>
Accession number:20221511946917
Title:Research on Key Technology of Compound Axis Control of Periscope Optical Communication Terminal
Authors:Liu, Peng (1, 2, 3); Li, Zhiguo (1, 2, 3); Xie, Meilin (1, 2); Wang, Fan (1, 2); Liu, Bo (1, 2); Chang, Zhiyuan (1, 2); Caiwen, Ma (1, 2, 3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an, China; (3) University of Chinese Academy of Science, Beijing, China
Corresponding author:Caiwen, Ma(cwma@opt.ac.cn)
Source title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Abbreviated source title:IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC
Part number:1 of 1
Issue title:IEEE 6th Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Issue date:2022
Publication year:2022
Pages:939-942
Language:English
ISBN-13:9781665431859
Document type:Conference article (CA)
Conference name:6th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2022
Conference date:March 4, 2022 - March 6, 2022
Conference location:Chongqing, China
Conference code:177924
Sponsor:Chengdu Union Institute of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, the problems of bandwidth matching, miss distance calculation and control loop coupling in the composite axis control system of optical communication terminal are analyzed and deduced in detail. Firstly, the relation between coarse and fine tracking bandwidth ratio is described. Secondly, the theoretical formula of miss distance under image rotation is derived by means of coordinate system transformation. Finally, a cooperative control strategy is proposed to achieve high precision tracking of the system. The accuracy and effectiveness of the above methods are verified by system simulation and test platform, which lays a theoretical and technical foundation for the application of the composite axis control system of the latent optical communication terminal.<br/></div> © 2022 IEEE.
Number of references:6
Main heading:Control systems
Controlled terms:Bandwidth - Optical communication - Simulation platform
Uncontrolled terms:Axis control - Bandwidth matching - Composite axis control system - Compound-axis - Distance calculation - Distance control - Image rotation - Key technologies - Miss-distance - Optical communications terminals
Classification code:716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 723.5 Computer Applications - 731.1 Control Systems
DOI:10.1109/ITOEC53115.2022.9734658
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;
Funding text:ACKNOWLEDGMENT The project was supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology (No: CXJJ-21S042).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 342>
Accession number:20223212553301
Title:Fabrication and Spectroscopic Properties of Heavily Pr<sup>3+</sup> Doped Selenide Chalcogenide Glass and Fiber for Mid-infrared Fiber Laser
Title of translation:用于中红外光纤激光器的高Pr3+掺杂硒化物硫系玻璃和光纤制备及其光谱特性
Authors:Xu, Chen-Yu (1, 2); Cui, Jian (1, 2); Xu, Yan-Tao (1); Xiao, Xu-Sheng (1); Cui, Xiao-Xia (1); Guo, Hai-Tao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Guo, Hai-Tao(guoht_001@opt.ac.cn)
Source title:Faguang Xuebao/Chinese Journal of Luminescence
Abbreviated source title:Faguang Xuebao
Volume:43
Issue:6
Issue date:June 2022
Publication year:2022
Pages:851-861
Language:English
ISSN:10007032
CODEN:FAXUEW
Document type:Journal article (JA)
Publisher:Editorial Office of Chinese Optics
Abstract:<div data-language="eng" data-ev-field="abstract">In order to develop a high gain medium for fiber lasers operating at 3-5 μm waveband，0-0. 4%（in weight）Pr<sup>3+</sup> ions doped Ge<inf>12</inf>As<inf>20.8</inf>Ga<inf>4</inf>Se<inf>63.2</inf> selenide chalcogenide glasses were prepared and the 0. 2%（in weight）Pr<sup>3+</sup> ions doped one was successfully drawn into step-index double-cladding fiber with the lowest loss of 2. 95 dB/m@6. 58 μm by a multistage rod-in-tube method. The electron-probe measure microanalysis（EPMA），X-ray diffraction （XRD），differential scanning calorimeter（DSC），field emission transmission electron microscope（FE-TEM），trans⁃ mission and mid-infrared fluorescence spectra were carried out to analyze the dispersion of Pr3+ ions in glass，the im⁃ purity contents，thermal and optical changes caused by the Pr<sup>3+</sup> ions’introduction. By analyzing the absorption and emission measurements of the serial glasses with the Judd-Ofelt theory，the Judd-Ofelt strength parameters，transi⁃ tion probabilities，exited state lifetime，branching ratios，and emission cross-sections were also calculated. This sel⁃ enide chalcogenide glass has high Pr<sup>3+</sup> ions’solubility and emission characteristic，good thermal stability and fiber forming performance，indicating that it has potential to be used as mid-infrared laser working medium.<br/></div> © 2022 Chines Academy of Sciences. All rights reserved.
Number of references:31
Main heading:Fiber lasers
Controlled terms:Chalcogenides - Differential scanning calorimetry - Fluorescence - Gallium compounds - Germanium compounds - Glass - Infrared devices - Metal ions - Optical fibers - Rare earths - Selenium compounds - Tellurium compounds - Transmission electron microscopy
Uncontrolled terms:Chalcogenide fibers - Chalcogenide glass - High gain - Infrared fibers - Infrared fluorescences - Mid-infrared fluorescence - Midinfrared - Rare earth ions - Selenides - Spectroscopic property
Classification code:531.1 Metallurgy - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.4 Solid State Lasers - 804.2 Inorganic Compounds - 812.3 Glass - 944.6 Temperature Measurements
Numerical data indexing:Age 2.08E+10yr, Decibel 9.50E+01dB, Percentage 2.00E+00%, Percentage 4.00E+00%, Size 3.00E-06m to 5.00E-06m, Size 5.80E-05m
DOI:10.37188/CJL.20220088
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 343>
Accession number:20224913200597
Title:Medical Image Retrieval Based on Attention Triplet Hashing
Authors:Guo, Shangrui (1); Yang, Kai (2, 3); Zhang, Zhijun (4); Li, Xijie (5)
Author affiliation:(1) Guangdong Country Garden School, Shunde, China; (2) Wuhan University of Technology, China; (3) University of Technology, Sanya Science and Education Innovation Park of Wuhan, Sanya, China; (4) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China; (5) Wuhan University of Technology, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China
Source title:2022 11th International Conference on Power Science and Engineering, ICPSE 2022
Abbreviated source title:Int. Conf. Power Sci. Eng., ICPSE
Part number:1 of 1
Issue title:2022 11th International Conference on Power Science and Engineering, ICPSE 2022
Issue date:2022
Publication year:2022
Pages:112-118
Language:English
ISBN-13:9781665451291
Document type:Conference article (CA)
Conference name:11th International Conference on Power Science and Engineering, ICPSE 2022
Conference date:September 23, 2022 - September 25, 2022
Conference location:Eskisehir, Turkey
Conference code:184106
Sponsor:IEEE Turkey Section; North China Electric Power University; SCIence and Engineering Institute; Turkey Section PES Chapter
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the wide application of X-ray, Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) methods in clinical practice, massive information retrieval and utilization of medical images has become a hot topic. Although traditional methods have shown good results in many specific medical applications, there are still many problems in large-scale medical applications. Deep hash method has been proved to be the most efficient approximate nearest neighbor search technique for large-scale image retrieval. To this end, Attention Triplet Hashing (ATH) network is proposed in this paper, which can further improve retrieval performance and ranking performance of small samples by learning low-dimensional hash codes that retain classification, ROI, and small sample information. We add channel attention to this end-to-end framework to focus on ROI information. And we add label smoothing regularization to distinguish small sample images. Finally, the validity of my framework is tested on a case-based medical dataset.<br/></div> © 2022 IEEE.
Number of references:17
Main heading:Medical applications
Controlled terms:Classification (of information) - Computerized tomography - Hash functions - Image retrieval - Magnetic resonance imaging - Medical imaging - Medical problems - Nearest neighbor search
Uncontrolled terms:Attention mechanisms - Deep hashing method - Hashing method - Imaging method - Label smoothing - Large-scales - Medical image retrieval - Small samples - Triplet label; - X-ray computed tomography
Classification code:461.1 Biomedical Engineering - 701.2 Magnetism: Basic Concepts and Phenomena - 716.1 Information Theory and Signal Processing - 723.5 Computer Applications - 746 Imaging Techniques - 903.1 Information Sources and Analysis - 921.5 Optimization Techniques
DOI:10.1109/ICPSE56329.2022.9935433
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 344>
Accession number:20220211457121
Title:Pairwise Comparison Network for Remote-Sensing Scene Classification (Open Access)
Authors:Zhang, Yue (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote-sensing scene classification aims to assign a specific semantic label to a remote-sensing image. Recently, convolutional neural networks (CNNs) have greatly improved the performance of remote-sensing scene classification. However, some confused images may be easily recognized as the incorrect category, which generally degrade the performance. The differences between image pairs can be used to distinguish image categories. This letter proposed a pairwise comparison network (PCNet), which contains two main steps: pairwise selection and pairwise representation. The proposed network first selects similar image pairs and then represents the image pairs with pairwise representations. The self-representation is introduced to highlight the informative parts of each image itself, while the mutual representation is proposed to capture the subtle differences between image pairs. Comprehensive experimental results on two challenging datasets (AID, NWPU-RESISC45) demonstrate the effectiveness of the proposed network.<br/></div> © 2004-2012 IEEE.
Number of references:17
Main heading:Remote sensing
Controlled terms:Convolution - Semantics - Neural networks
Uncontrolled terms:Comparison networks - Convolutional neural network - Image pairs - Multi-branch method - Pair-wise comparison - Performance - Remote sensing scene classification - Remote-sensing - Scene classification - Specific semantics
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/LGRS.2021.3139695
Funding details: Number: 2020KJXX-091,2020TD-015, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, and in part by the Innovation Capability Support Program of Shaanxi under Grant 2020KJXX-091 and Grant 2020TD-015.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze, Green
<RECORD 345>
Accession number:20224613126037
Title:Thermal Management Technologies Used for High Heat Flux Automobiles and Aircraft: A Review (Open Access)
Authors:Lv, Yi-Gao (1); Zhang, Gao-Peng (2); Wang, Qiu-Wang (1); Chu, Wen-Xiao (1)
Author affiliation:(1) Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi’an Jiaotong University, Xi’an; 710049, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Corresponding author:Chu, Wen-Xiao(wxchu84@xjtu.edu.cn)
Source title:Energies
Abbreviated source title:Energies
Volume:15
Issue:21
Issue date:November 2022
Publication year:2022
Article number:8316
Language:English
E-ISSN:19961073
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, global automotive industries are going through a significant revolution from traditional internal combustion engine vehicles (ICEVs) to electric vehicles (EVs) for CO<inf>2</inf> emission reduction. Very similarly, the aviation industry is developing towards more electric aircraft (MEA) in response to the reduction in global CO<inf>2</inf> emission. To promote this technology revolution and performance advancement, plenty of electronic devices with high heat flux are implemented on board automobiles and aircraft. To cope with the thermal challenges of electronics, in addition to developing wide bandgap (WBG) semiconductors with satisfactory electric and thermal performance, providing proper thermal management solutions may be a much more cost-effective way at present. This paper provides an overview of the thermal management technologies for electronics used in automobiles and aircraft. Meanwhile, the active methods include forced air cooling, indirect contact cold plate cooling, direct contact baseplate cooling, jet impingement, spray cooling, and so on. The passive methods include the use of various heat pipes and PCMs. The features, thermal performance, and development tendency of these active and passive thermal management technologies are reviewed in detail. Moreover, the environmental influences introduced by vibrations, shock, acceleration, and so on, on the thermal performance and reliability of the TMS are specially emphasized and discussed in detail, which are usually neglected in normal operating conditions. Eventually, the possible future directions are discussed, aiming to serve as a reference guide for engineers and promote the advancement of the next-generation electronics TMS in automobile and aircraft applications.<br/></div> © 2022 by the authors.
Number of references:185
Main heading:Cost effectiveness
Controlled terms:Automobile cooling systems - Automotive industry - Carbon dioxide - Emission control - Environmental management - Global warming - Heat flux - More electric aircraft - Silicon carbide - Temperature control - Vehicle performance - Wide band gap semiconductors
Uncontrolled terms:Active cooling - Aviation industry - CO 2 emission - Emission reduction - Environmental influences - High heat flux - Internal combustion engine vehicles - Management technologies - Passive cooling - Thermal Performance
Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 454.1 Environmental Engineering, General - 454.2 Environmental Impact and Protection - 641.2 Heat Transfer - 652.1 Aircraft, General - 662.1 Automobiles - 662.4 Automobile and Smaller Vehicle Components - 663.1 Heavy Duty Motor Vehicles - 712.1 Semiconducting Materials - 731.3 Specific Variables Control - 804.2 Inorganic Compounds - 911.2 Industrial Economics
DOI:10.3390/en15218316
Funding details: Number: 52206113, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This research was funded by the National Natural Science Foundation of China (Grant No. 52206113) and the Youth Innovation Promotion Association, CAS (Grant No. 2022410).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 346>
Accession number:20224713152145
Title:Effective half-wavelength pitch optical phased array design for aliasing-free 2D beam steering
Authors:Lei, Yufang (1, 2); Zhang, Lingxuan (1, 2); Xue, Yulong (1, 2); Ren, Yangming (1, 2); Zhang, Qihao (1, 2); Zhang, Wenfu (1, 2); Sun, Xiaochen (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:32
Issue date:November 10, 2022
Publication year:2022
Pages:9423-9428
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method to design an optical phased array (OPA) simultaneously realizing both narrow beam width and aliasing-free 2D beam steering without the need to arrange the antennas at actual half-wavelength pitch. The method realizes an effective half-wavelength pitch in one direction formed by location projection of the antennas. The distances between the antennas in the other direction can be sufficiently large to form an effective large aperture realizing narrow beam width without needing a long grating. The presented method is proven by both theory and numerical simulations to achieve an equivalent grating-lobe-free far field of an ordinary half-wavelength pitch design. One design example exhibits 180<sup>◦</sup> steering with a minimal beam width of 0.4<sup>◦</sup> * 0.032<sup>◦</sup> and a sidelobe suppression ratio of >13 dB.<br/></div> Journal © 2022 Optica Publishing Group.
Number of references:29
Main heading:Design
Controlled terms:Antenna phased arrays - Numerical methods
Uncontrolled terms:Aliasing - Array design - Beam widths - Beam-steering - Far-field - Grating lobes - Half wavelength - Large aperture - Narrow beams - Optical phased arrays
Classification code:921.6 Numerical Methods
Numerical data indexing:Decibel 1.30E+01dB
DOI:10.1364/AO.474504
Funding details: Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. Natural Science Foundation of Shaanxi Province (2019JQ-447); China Postdoctoral Science Foundation (2020M673523); National Natural Science Foundation of China (12004421, 61635013, 61675231).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 347>
Accession number:20223612691790
Title:Review of the Development of Interferometric Spectral Imaging Technology (Invited)
Title of translation:干 涉 光 谱 成 像 技 术 发 展 的 回 顾（特 邀）
Authors:Hu, Bingliang (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710072, China
Corresponding author:Hu, Bingliang(hbl@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:0751401
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Interferometric spectroscopic imaging technology has undergone decades of experience accumulation and technological development. At present，it has extensive and mature applications in the fields of astronomical exploration， atmospheric pollution， water environment monitoring， surface geological mineral exploration，vegetation survey and other fields. Compared with dispersive and filter-type spectral imaging techniques，interferometric spectroscopic imaging technology has the advantages of high resolution，high sensitivity，and high wave number accuracy. According to the type of optical path acquisition method，this paper summarizes the research status of interferometric spectroscopic imaging technology at domestic and abroad from three aspects：time modulation，spatial modulation，and spatiotemporal joint modulation. Then introduces and reviews their representative research results. For time-modulated interferometric spectroscopy imaging，the interferogram acquired by the detector can be seen as a collection of time series. Interference maps are acquired one by one over time. The main advantages of this technique are the high spectral resolution and detection sensitivity. However，this type of optical system requires a continuously moving precision part to produce an optical path difference that changes over time. The main technical difficulty of time-modulated interferometer spectroscopy is how to develop a set of stable，reliable and long-working high-precision moving mirror scanning system. Spatial modulation interferometric spectroscopy records interference information at different cell positions of the detector for different optical path differences of the measured target. A complete interference map of the target can be obtained with a single exposure. This technology fundamentally overcomes the problem of precision moving mirror scanning system in time-modulated spectrometers， and also improves the real-time performance of obtaining spectral information. The essence of spatiotemporal combined modulation interferometer spectroscopy is to insert a transverse shear interferometer into the camera system. Since there is no slit in the front optical system，this type of instrument not only has the characteristics of high detection sensitivity，high stability and high signal-to-noise ratio，but also has the advantages of high throughput. It can be seen that different modulation methods use different optical path structures. Of course，each spectroscopic principle also has its advantages and disadvantages，which can be applied to different application areas. The research of interferometric spectroscopy imaging technology has always attracted much attention. There is no doubt that the emergence of relevant new technologies is often very eye-catching. Over the past three decades，interferometric imaging spectroscopy technology has been rapidly developed in the field of remote sensing，and has gradually become an effective tool for high-resolution remote sensing detection. With the rapid development of detector focal plane array，precision machinery，high-speed data transmission and storage compression，data quantification and computer image processing，the future of spectral imagers will have a large field of view，wide spectral range，high sensitivity，high spectral resolution，high spatial resolution and other performance. Moreover，the technology gradually tends to develop in the direction of new principles，integration，automation，wireless，intelligence，single cylinder and miniaturization.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:98
Main heading:Interferometers
Controlled terms:Imaging systems - Interferometry - Mirrors - Modulation - Optical systems - Signal to noise ratio - Spectral resolution - Spectrometers - Surveys
Uncontrolled terms:Imaging technology - Interferometric spectroscopic imaging - Interferometric spectroscopy - Interferometrics - Joint modulation - Spatial modulations - Spatio-temporal - Spatio-temporal joint modulation - Spectroscopic imaging - Time-modulation
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.3788/gzxb20225107.0751401
Funding details: Number: 61905275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:item： National Natural Science Foundation of China（ No. 61905275）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 348>
Accession number:20223912806731
Title:High-resolution depth imaging with a small-scale SPAD array based on the temporal-spatial filter and intensity image guidance (Open Access)
Authors:Kang, Yan (1); Xue, Ruikai (1, 2); Wang, Xiaofang (1, 2); Zhang, Tongyi (1, 2); Meng, Fanxing (1, 2); Li, Lifei (1); Zhao, Wei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Kang, Yan(kangyan@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:19
Issue date:September 12, 2022
Publication year:2022
Pages:33994-34011
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Currently single-photon avalanche diode (SPAD) arrays suffer from a small-scale pixel count, which makes it difficult to achieve high-resolution 3D imaging directly through themselves. We established a CCD camera-assisted SPAD array depth imaging system. Based on illumination laser lattice generated by a diffractive optical element (DOE), the registration of the low-resolution depth image gathered by SPAD and the high-resolution intensity image gathered by CCD is realized. The intensity information is used to guide the reconstruction of a resolution-enhanced depth image through a proposed method consisting of total generalized variation (TGV) regularization and temporal-spatial (T-S) filtering algorithm. Experimental results show that an increasement of 4 × 4 times for native depth image resolution is achieved and the depth imaging quality is also improved by applying the proposed method.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:47
Main heading:Image resolution
Controlled terms:Beamforming - CCD cameras - Image enhancement - Imaging systems - Information filtering - Optical lattices - Particle beams
Uncontrolled terms:Depth image - Depth imaging - Filter images - High resolution - High-resolution depth - Intensity images - Single-photon avalanche diode arrays - Small scale - Spatial filters - Spatial intensity
Classification code:711.2 Electromagnetic Waves in Relation to Various Structures - 714.2 Semiconductor Devices and Integrated Circuits - 742.2 Photographic Equipment - 744.8 Laser Beam Interactions - 746 Imaging Techniques - 903.1 Information Sources and Analysis - 932.1 High Energy Physics
DOI:10.1364/OE.459787
Funding details: Number: 095920211305, Acronym: -, Sponsor: -;Number: 62001473,62171443, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2022GY-009, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:Acknowledgments. Y. Kang thanks Research Fund from Youth Talents Promotion Program of Xi’an and State Key Laboratory of Transient Optics and Photonics.Funding. National Natural Science Foundation of China (62001473, 62171443); Key Research and Development Projects of Shaanxi Province (2022GY-009); Youth Talents Promotion Program of Xi ’an (095920211305); State Key Laboratory of Transient Optics and Photonics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 349>
Accession number:20224212985351
Title:Retrieving Water Quality Parameters from Noisy-Label Data Based on Instance Selection (Open Access)
Authors:Liu, Yuyang (1, 2); Liu, Jiacheng (1, 2); Zhao, Yubo (1); Wang, Xueji (1); Song, Shuyao (1, 2); Liu, Hong (1); Yu, Tao (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:19
Issue date:October 2022
Publication year:2022
Article number:4742
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">As an important part of the "air–ground" integrated water quality monitoring system, the inversion of water quality from unmanned airborne hyperspectral image has attracted more and more attention. Meanwhile, unmanned aerial vehicles (UAVs) have the characteristics of small size, flexibility and quick response, and can complete the task of water environment detection in a large area, thus avoiding the difficulty in obtaining satellite data and the limitation of single-point monitoring by ground stations. Most researchers use UAV for water quality monitoring, they take water samples back to library or directly use portable sensors for measurement while flying drones at the same time. Due to the UAV speed and route planning, the actual sampling time and the UAV passing time cannot be guaranteed to be completely synchronized, and there will be a difference of a few minutes. For water quality parameters such as chromaticity (chroma), chlorophyll-a (chl-a), chemical oxygen demand (COD), etc., the changes in a few minutes are small and negligible. However, for the turbidity, especially in flowing water body, this value of it will change within a certain range. This phenomenon will lead to noise error in the measured suspended matter or turbidity, which will affect the performance of regression model and retrieval accuracy. In this study, to solve the quality problem of label data in a flowing water body, an unmanned airborne hyperspectral water quality retrieval experiment was carried out in the Xiao River in Xi’an, China, which verified the rationality and effectiveness of label denoising analysis of different water quality parameters. To identify noisy label instances efficiently, we proposed an instance selection scheme. Furthermore, considering the limitation of the dataset samples and the characteristic of regression task, we build a 1DCNN model combining a self attention mechanism (SAM) and the network achieves the best retrieving performance on turbidity and chroma data. The experiment results show that, for flowing water body, the noisy-label instance selection method can improve retrieval performance slightly on the COD parameter, but improve greatly on turbidity and chroma data.<br/></div> © 2022 by the authors.
Number of references:43
Main heading:Water quality
Controlled terms:Aircraft detection - Antennas - Regression analysis - Spectroscopy - Turbidity - Unmanned aerial vehicles (UAV)
Uncontrolled terms:Aerial vehicle - Flowing waters - HyperSpectral - Hyperspectral image - Instance selection - Noisy labels - Noisy-label learning - Unmanned aerial vehicle - Water quality parameters - Waterbodies
Classification code:445.2 Water Analysis - 652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 741.1 Light/Optics - 922.2 Mathematical Statistics
DOI:10.3390/rs14194742
Funding details: Number: 2019SF-254, Acronym: -, Sponsor: -;Number: XDA23040101, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020-XXX-014-01, Acronym: -, Sponsor: National Defense Science and Technology Innovation Fund of the Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Defense Science and Technology Innovation Special Zone Project under Grant 2020-XXX-014-01, in part by the Chinese Academy of Sciences Strategic Science and Technology Pilot Project A under Grant XDA23040101, and in part by the Shanxi provincial key R&D plan project under Grant 2019SF-254.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 350>
Accession number:20224312992537
Title:Differentiate Visual Features with Guidance Signals for Video Captioning (Open Access)
Authors:Yang, Yifan (1, 2); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Sheng, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:CCRIS 2022 - Conference Proceeding: 2022 3rd International Conference on Control, Robotics and Intelligent System
Issue date:August 26, 2022
Publication year:2022
Pages:235-240
Language:English
ISBN-13:9781450396851
Document type:Conference article (CA)
Conference name:3rd International Conference on Control, Robotics and Intelligent System, CCRIS 2022
Conference date:August 26, 2022 - August 28, 2022
Conference location:Virtual, Online, China
Conference code:183363
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">The task of video captioning is to generate comprehensible and grammatically correct sentences which describe the main visual content of videos. Existing neural modules based methods improve the model interpretability by separately predicting words of different part-of-speech. However, the separation of different modules may lead to confusing semantics. In this work, a video captioning method referred to as Differentiate Visual Features with Guidance Signals (DVFGS) is proposed, which enhances the semantic consistency of the neural modules based method through guidance signals. This process is similar to the cell differentiation process, producing differences and having different effects on the whole. Extensive experiments performed on MSVD and MSR-VTT show that DVFGS pushes the limit of neural modules based video captioning methods forward.<br/></div> © 2022 ACM.
Number of references:41
Main heading:Semantics
Uncontrolled terms:Attention - Guidance signal - Interpretability - Module-based - Neural module - Part Of Speech - Semantic consistency - Video captioning - Visual content - Visual feature
DOI:10.1145/3562007.3562052
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 351>
Accession number:20224913203720
Title:Real-time air turbulence calibration of large aperture camera image quality measurement system
Authors:Liu, Shangkuo (1, 2); Liu, Kai (1); Wang, Zhengfeng (1); Kewei, E. (1); Wang, Tao (1); Zhou, Yan (1); Zhao, Jianke (1); Yao, Baoli (1)
Author affiliation:(1) Chinese Academy of Science, Xi’an Institute of Optics and Precision Mechanics, No.17 Xinxi Road, Xi’an; 710119, China; (2) University of Chinese Academy of Science, No.19(A) Yuquan Road, Beijing; 100049, China
Corresponding author:Liu, Shangkuo(liushangkuo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12448
Part number:1 of 1
Issue title:5th Optics Young Scientist Summit, OYSS 2022
Issue date:2022
Publication year:2022
Article number:124481D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510660014
Document type:Conference article (CA)
Conference name:5th Optics Young Scientist Summit, OYSS 2022
Conference date:September 16, 2022 - September 19, 2022
Conference location:Fuzhou, China
Conference code:184450
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">When measuring image qualities of large aperture cameras, many factors like people moving around, blowing of air conditioners outlets, thermal convection, etc., will give rise to air turbulence (AT). AT mainly induces non-uniform distribution of air components in the image chain of large aperture camera image quality measurement systems, which will lead to variations of system wavefront errors. Thus, AT will introduce errors to measurement results of traditional image quality evaluation methods. Those errors increase with the camera aperture and are usually time-varying. This paper proposes a method to calibrate AT in real time when measuring image qualities of large aperture cameras. A defocused star point target (DSPT) is added to traditional test targets (TTT). The camera under test can capture images of TTT and DSPT simultaneously. The distance between the effective area of TTT and the DSPT is carefully designed so that the corresponding images do not overlap with each other. We calibrate AT induced wavefront errors by processing the DSPT images with phase retrieval method. Experimental results of AT induced wavefront errors calibrated by the proposed method are presented.<br/></div> © 2022 SPIE.
Number of references:8
Main heading:Cameras
Controlled terms:Calibration - Errors - Heat convection - Image quality - Search engines - Wavefronts
Uncontrolled terms:Air turbulence - Camera images - Large aperture - Large aperture camera - Optical test - Optical- - Phase retrieval - Point targets - Real- time - Wavefront errors
Classification code:641.2 Heat Transfer - 723 Computer Software, Data Handling and Applications - 742.2 Photographic Equipment
DOI:10.1117/12.2638454
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 352>
Accession number:20220511562886
Title:Hyperspectral Unmixing Using Nonlocal Similarity-Regularized Low-Rank Tensor Factorization
Authors:Yuan, Yuan (1); Dong, Le (2, 3); Li, Xuelong (1)
Author affiliation:(1) School of Artificial Intelligence, Optics and Electronics (IOPEN), Northwestern Polytechnical University, Xi'an, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yuan, Yuan(y.yuan1.ieee@qq.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Recently, methods based on nonnegative tensor factorization (NTF), which benefits from the tensor representation of hyperspectral imagery (HSI) without any information loss, have attracted increasing attention. However, most existing methods fail to explore the internal spatial structure of data, resulting in low unmixing performance. Moreover, when the algorithm is optimized, the solution is unstable. In this article, a regularizer based on nonlocal tensor similarity is proposed, which can not only fully preserve the global information of HSI but also mine the internal information of data in the spatial domain. HSI is regarded as a 3-D tensor and is directly subjected to endmember extraction and abundance estimation. To fully explore the structural characteristics of data, we simultaneously use the local smoothing and low tensor rank prior of the data to constrain the unmixing model. First, several 4-D tensor groups can be obtained after the nonlocal similarity structure of HSI is learned. Subsequently, a low tensor rank prior is applied to each 4-D tensor, which can fully simulate the nonlocal similarity in the image. In addition, total variation (TV) is also used to explore the local spatial relationship of data, which can generate a smooth abundance map through edge preservation. The optimization is solved by the ADMM algorithm. Experiments on synthetic and real data illustrate the superiority of the proposed method.<br/></div> © 1980-2012 IEEE.
Number of references:50
Main heading:Tensors
Controlled terms:Factorization - Spectroscopy
Uncontrolled terms:Hyperspectral unmixing - Information loss - Low tensor rank - Non-local similarities - Nonnegative tensor factorization - Nonnegative tensor factorizations - Tensor factorization - Tensor ranks - Tensor representation - Unmixing
Classification code:921 Mathematics - 921.1 Algebra
DOI:10.1109/TGRS.2021.3095488
Funding details: Number: 61632018, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020YFB2103902, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61825603, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Key Research and Development Project under Grant 2020YFB2103902, in part by the National Science Fund for Distinguished Young Scholars under Grant 61825603, and in part by the Key Program of National Natural Science Foundation of China under Grant 61632018.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 353>
Accession number:20221611980797
Title:Design and Ground Verification for Multispectral Camera on the Mars Tianwen-1 Rover
Authors:Yang, Jian-Feng (1); Liu, Da-Wei (2); Xue, Bin (1); Lyu, Juan (1); Liu, Jian-Jun (2); Li, Fu (1); Ren, Xin (2); Ge, Wei (1); Liu, Bin (2); Ma, Xiao-Long (1); Lyu, Bao-Gang (1); Ruan, Ping (1); Qiao, Wei-Dong (1); Lu, Di (1)
Author affiliation:(1) Lunar and Deep Space Exploration Technology Laboratory of Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) National Astronomical Observatories, Chinese Academy of Science, Beijing; 100012, China
Corresponding authors:Lyu, Juan(lvjuan@opt.ac.cn); Liu, Da-Wei(liudw@nao.cas.cn)
Source title:Space Science Reviews
Abbreviated source title:Space Sci Rev
Volume:218
Issue:3
Issue date:April 2022
Publication year:2022
Article number:19
Language:English
ISSN:00386308
E-ISSN:15729672
CODEN:SPSRA4
Document type:Journal article (JA)
Publisher:Springer Science and Business Media B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">As part of China’s first Mars exploration mission ‘Tianwen-1’, the Zhurong rover has successfully touched down on the surface of southern Utopia Planitia on May 15th 2021 and has been conducting surface operations for several months. A multispectral camera (MSCam), as an important payload onboard the Zhurong rover, aims to acquire multispectral images to investigate the morphological characteristics and mineralogic properties of the Martian surface. In this study, a detailed optimization design for the MSCam was carried out to achieve the abovementioned scientific objectives. The MSCam can perform multispectral imaging without chromatic aberration by utilizing eight narrow bandwidth filters made of glass of different thicknesses. Clear images of observation targets at different distances can be obtained by utilizing the six focal plane compensation lenses of varying thicknesses through the rotation of wheels. Calibration experiments, key specification tests and ground verification tests were also conducted in this study. Our results show that the pixel resolution of the MSCam can reach 0.146 mrad, the system static modulation transfer function (MTF) of the MSCam is better than 0.25@525 nm, and the signal-to-noise ratio (SNR) is higher than 40 dB, all of which allow clear imaging and accurate multispectral data acquisition of the targets. The high-resolution images obtained by the MSCam will provide detailed geological context for the data interpretation of other payloads on the rover, such as the Mars surface composition detector (MarSCoDe). The mineralogy information of the targets (e.g., fresh rock, dune) indicated by the MSCam multispectral data will also help to constrain the surface material composition of Mars.<br/></div> © 2022, The Author(s), under exclusive licence to Springer Nature B.V.
Number of references:28
Main heading:Calibration
Controlled terms:Martian surface analysis - Minerals - Aberrations - Rovers - Data acquisition - Cameras - Signal to noise ratio
Uncontrolled terms:Conducting surfaces - Exploration missions - Ground tests - Mars exploration - Morphological characteristic - Multi-spectral data - Multispectral cameras - Multispectral images - Property - Surface operations
Classification code:482.2 Minerals - 655.1 Spacecraft, General - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment
Numerical data indexing:Absorbed dose 1.46E-06Gy, Decibel 4.00E+01dB, Size 5.25E-07m
DOI:10.1007/s11214-022-00886-3
Funding details: Number: 11941002, Acronym: NNSFC, NNSF, NSF, NSFC, Sponsor: National Natural Science Foundation of China;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 354>
Accession number:20224112865019
Title:Influence of multiphoton events on the quantum enhanced phase estimation
Authors:Zhang, Mingran (1, 2); Huang, Long (1, 2); Liu, Yang (1, 2); Zhao, Wei (1, 2); Wang, Weiqiang (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Weiqiang(wwq@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:21
Issue date:October 10, 2022
Publication year:2022
Pages:37833-37845
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Quantum metrology can approach measurement precision of Heisenberg Limit using an ideal quantum source, which has attracted a great interest in fundamental physical studies. However, the quantum metrology precision is impressionable to the system noise in experiments. In this paper, we analyze the influence of multiphoton events on the phase estimation precision when using a nondeterministic single photon source. Our results show there are an extra bias and quantum enhanced region restriction due to multiphoton events, which declines the quantum phase estimation precision. A limitation of multiphoton probability is obtained for quantum enhanced phase estimation accuracy under different experimental model. Our results provide beneficial suggestions for improving quantum metrology precision in future experiments.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:65
Main heading:Particle beams
Uncontrolled terms:Estimation precision - Experimental modelling - Heisenberg limit - Measurement precision - Multiphotons - Phase-estimation - Quantum metrology - Quantum phase estimation - Single-photon source - System noise
Classification code:932.1 High Energy Physics
DOI:10.1364/OE.468727
Funding details: Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (62075238).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 355>
Accession number:20220911734915
Title:Computer-aided alignment method for AIMS solar telescope
Authors:E., Kewei (1); Fu, Xin (1); Shen, Yuliang (2); Zhao, Jianke (3); Wang, Tao (1); Chang, Ming (1); Liu, Shangkuo (1); Xue, Xun (1); Zhou, Yan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 70119, China; (2) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (3) University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:E., Kewei(ekewei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121664V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">AIMS is an infrareds optical system for the accurate measurement of solar magnetic field, which is a national major scientific research project currently developed. The guiding optical system of AIMS is an off-axis Gregorian system, due to the designed minimum angle between the optical axis of the optical system and horizontal plane is 14.036°, a sub-aperture stitching test approach is developed to test the wavefront of the system. That makes the process of precision alignment of the system very difficult and laborious. Therefore, we developed a two-step alignment approach that based on merit function regression method, the developed method can make alignment of AIMS guiding optical system efficiency and accuracy. In this paper, we explain the detailed two-step alignment method and apply it to the real alignment of AIMS guiding system. Aided with sub-aperture stitching measurements, the AIMS guiding system is aligned and the results show that in 0.076λrms wavefront error in effective aperture was achieved.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Alignment
Controlled terms:Telescopes - Wavefronts - Regression analysis - Optical testing - Optical systems
Uncontrolled terms:Accurate measurement - AIMS - Computer-aided alignment method - Guiding systems - Infrared optical systems - Measurements of - Solar telescope - Sub-aperture stitching - Sub-aperture testing - Subaperture
Classification code:601.1 Mechanical Devices - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics
DOI:10.1117/12.2617389
Funding details: Number: E15151Z1, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:gratefully acknowledges the financial support from the Youth Innovation Promotion AssociationOne of the authors gratefully acknowledges the financial support from the Youth Innovation Promotion Association XIOPM-CAS (E15151Z1).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 356>
Accession number:20220911734986
Title:Infrared dim target detecting algorithm based on multi-feature and spatio-temporal fusion
Authors:Bai, Mei (1, 2); Zhang, Jian (1); Zhao, Hui (1)
Author affiliation:(1) Xi'An INSTITUTE of OPTICS and PRECISION MECHANICS of CAS, China; (2) Shan'Xi NORMAL UNIVERSITY, China
Corresponding author:Zhang, Jian(zhjian@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12166
Part number:1 of 1
Issue title:Seventh Asia Pacific Conference on Optics Manufacture, APCOM 2021
Issue date:2022
Publication year:2022
Article number:121666W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510652088
Document type:Conference article (CA)
Conference name:7th Asia Pacific Conference on Optics Manufacture, APCOM 2021
Conference date:October 28, 2021 - October 31, 2021
Conference location:Shanghai, China
Conference code:177285
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Focusing on the detection of infrared dim targets in space-based imaging systems, a multi-feature and spatio-temporal fusion algorithm is proposed. By analyzing characteristics of target and background in the image, firstly, an algorithm combining TOP-HAT and improved partial differentiation method is proposed for image preprocessing; Secondly, the local entropy feature and local gradient feature of the small target image are extracted from images to fuse, an improved interframe method is used for spatio-temporal fusion to enhance the target signal, then threshold segmentation is used to obtain the detection result. Theoretical analysis and experiments show that the algorithm proposed in this paper can not only suppress the background and enhance the target well; in addition, it is possible to realize the on-chip transplantation of hardware.<br/></div> © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:16
Main heading:Image enhancement
Controlled terms:Feature extraction - Image segmentation
Uncontrolled terms:Dim target - Dim target detection - Improved-PM - Infrared dim target detection - Multi-feature fusion - Multifeatures - Space-based imaging systems - Spatio-temporal fusions - Target detecting algorithms - Top hat
Classification code:723.2 Data Processing and Image Processing
DOI:10.1117/12.2617906
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 357>
Accession number:20220114265
Title:Pairwise Comparison Network for Remote Sensing Scene Classification
Authors:Zhang, Yue (1, 2); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) The Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) The University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:May 17, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing scene classification aims to assign a specific semantic label to a remote sensing image. Recently, convolutional neural networks have greatly improved the performance of remote sensing scene classification. However, some confused images may be easily recognized as the incorrect category, which generally degrade the performance. The differences between image pairs can be used to distinguish image categories. This paper proposed a pairwise comparison network, which contains two main steps: pairwise selection and pairwise representation. The proposed network first selects similar image pairs, and then represents the image pairs with pairwise representations. The self-representation is introduced to highlight the informative parts of each image itself, while the mutual-representation is proposed to capture the subtle differences between image pairs. Comprehensive experimental results on two challenging datasets (AID, NWPU-RESISC45) demonstrate the effectiveness of the proposed network. The code are provided in https://github.com/spectralpublic/PCNet.git.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Remote sensing
Controlled terms:Convolution - Convolutional neural networks - Semantics
Uncontrolled terms:Comparison networks - Convolutional neural network - Image pairs - Multi-branch method - Pair-wise comparison - Performance - Remote sensing scene classification - Remote-sensing - Scene classification - Specific semantics
Classification code:716.1 Information Theory and Signal Processing
DOI:10.48550/arXiv.2205.08147
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2205.08147v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 358>
Accession number:20222112134001
Title:Experimental Study on the Exploration of Camera Scanning Reflective Fourier Ptychography Technology for Far-Field Imaging (Open Access)
Authors:Yang, Mingyang (1, 2); Fan, Xuewu (1); Wang, Yuming (1, 2); Zhao, Hui (1)
Author affiliation:(1) Space Optical Technology Research Department, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi’an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:9
Issue date:May-1 2022
Publication year:2022
Article number:2264
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier ptychography imaging is a powerful phase retrieval method that can be used to realize super-resolution. In this study, we establish a mathematical model of long-distance camera scanning based on reflective Fourier ptychography imaging. In order to guarantee the effective recovery of a high-resolution image in the experiment, we analyze the influence of laser coherence in different modes and the surface properties of diverse materials for diffused targets. For the analysis, we choose a single-mode fiber laser as the illumination source and metal materials with high diffused reflectivity as the experimental targets to ensure the validity of the experimental results. Based on the above, we emulate camera scanning with a single camera attached to an X-Y translation stage, and an experimental system with a working distance of 3310 mm is used as an example to image a fifty-cent coin. We also perform speckle analysis for rough targets and calculate the average speckle size using a normalized autocorrelation function in different positions. The method of calculating the average speckle size for everyday objects provides the premise for subsequent research on image quality evaluation; meanwhile, the coherence of the light field and the targets with high reflec-tivity under this experiment provide an application direction for the further development of the technique, such as computer vision, surveillance and remote sensing.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:31
Main heading:Scanning
Controlled terms:Fiber lasers - Fourier transforms - Cameras - Speckle - Synthetic apertures - Single mode fibers - Quality control - Remote sensing
Uncontrolled terms:Camera-scanning - Coherent illumination - Far-field imaging - Fourier - Fourier ptychography - High resolution - High-resolution imag-ing - Phase retrieval - Retrieval methods - Speckle size
Classification code:716.2 Radar Systems and Equipment - 741.1 Light/Optics - 741.1.2 Fiber Optics - 742.2 Photographic Equipment - 744.4 Solid State Lasers - 913.3 Quality Assurance and Control - 921.3 Mathematical Transformations
Numerical data indexing:Size 3.31E+00m
DOI:10.3390/rs14092264
Funding text:This research was funded by the Major Project on the High-Resolution Earth Observation System (GFZX04014307).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 359>
Accession number:20220811698985
Title:Learning a Fully Connected U-Net for Spectrum Reconstruction of Fourier Transform Imaging Spectrometers (Open Access)
Authors:Chen, Tieqiao (1, 2); Su, Xiuqin (1, 3); Li, Haiwei (1); Li, Siyuan (1); Liu, Jia (1, 2); Zhang, Geng (1); Feng, Xiangpeng (1); Wang, Shuang (1); Liu, Xuebin (1); Wang, Yihao (1, 2); Zou, Chunbo (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:4
Issue date:February-2 2022
Publication year:2022
Article number:900
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier transform imaging spectrometers (FTISs) are widely used in global hyperspectral remote sensing due to the advantages of high stability, high throughput, and high spectral resolution. Spectrum reconstruction (SpecR) is a classic problem of FTISs determining the acquired data quality and application potential. However, the state-of-the-art SpecR algorithms were restricted by the length of maximum optical path difference (MOPD) of FTISs and apodization processing, resulting in a decrease in spectral resolution; thus, the applications of FTISs were limited. In this study, a deep learning SpecR method, which directly learned an end-to-end mapping between the interfer-ence/spectrum information with limited MOPD and without apodization processing, was proposed. The mapping was represented as a fully connected U-Net (FCUN) that takes the interference fringes as the input and outputs the highly precise spectral curves. We trained the proposed FCUN model using the real spectra and simulated pulse spectra, as well as the corresponding simulated interference curves, and achieved good results. Additionally, the performance of the proposed FCUN on real interference and spectral datasets was explored. The FCUN could obtain similar spectral values compared with the state-of-the-art fast Fourier transform (FFT)-based method with only 150 and 200 points in the interferograms. The proposed method could be able to enhance the resolution of the reconstructed spectra in the case of insufficient MOPD. Moreover, the FCUN performed well in visual quality using noisy interferograms and gained nearly 70% to 80% relative improvement over FFT for the coefficient of mean relative error (MRE). All the results based on simulated and real satellite datasets showed that the reconstructed spectra of the FCUN were more consistent with the ideal spectrum compared with that of the traditional method, with higher PSNR and lower values of spectral angle (SA) and relative spectral quadratic error (RQE).<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:38
Main heading:Fast Fourier transforms
Controlled terms:Photomapping - Deep learning - Hyperspectral imaging - Spectral resolution - Optical remote sensing - Interferometry
Uncontrolled terms:Deep learning - Fourier transform imaging spectrometer - Fourier transform imaging spectrometers - Fully connected U-net - Optical path difference - Spectra's - Spectrum reconstruction - State of the art - U-net
Classification code:405.3 Surveying - 461.4 Ergonomics and Human Factors Engineering - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography - 746 Imaging Techniques - 921.3 Mathematical Transformations - 941.4 Optical Variables Measurements
Numerical data indexing:Percentage 7.00E+01% to 8.00E+01%
DOI:10.3390/rs14040900
Funding details: Number: NO.NODAOP2021007, Acronym: -, Sponsor: -;Number: NO.2021JQ-324, Acronym: -, Sponsor: -;Number: 41706217,42176182,NO.2019JQ-929, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: NO.2020JQ-436, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding: This study was supported by the Natural Science Foundation of Shaanxi Province (Grant NO.2020JQ-436), the Open Research Fund of National Earth Observation Data Center (Grant NO.NODAOP2021007), the National Science Basic Research Foundation of Shaanxi Province (Grant NO.2021JQ-324), the National Natural Science Foundation of China under Grants (Grant NO. 41706217, 42176182), the National Science Basic Research Foundation of Shaanxi Province (Grant NO.2019JQ-929), and Youth Innovation Promotion Association CAS.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 360>
Accession number:20222212177677
Title:A Data Mining Algorithm for Hyperspectral Target Detection Based on UAV
Authors:Zhou, Jian (1); Qiu, Shi (2); Wang, Zhuping (3); Nie, Cong (1)
Author affiliation:(1) Xi’an Modern Control Technology Research Institute, Xi’an, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Xi’an Institute of Electromechanical Information Technology, Xi’an, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:Lecture Notes in Electrical Engineering
Abbreviated source title:Lect. Notes Electr. Eng.
Volume:861 LNEE
Part number:1 of 1
Issue title:Proceedings of 2021 International Conference on Autonomous Unmanned Systems, ICAUS 2021
Issue date:2022
Publication year:2022
Pages:63-73
Language:English
ISSN:18761100
E-ISSN:18761119
ISBN-13:9789811694912
Document type:Conference article (CA)
Conference name:International Conference on Autonomous Unmanned Systems, ICAUS 2021
Conference date:September 24, 2021 - September 26, 2021
Conference location:Changsha, China
Conference code:275179
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">The hyperspectral image has spatial resolution and inter-spectral resolution, which can visually display the information of the ground object. It is of great significance to the typical targets of hyperspectral data mining. With the development of drone technology, it is possible to detect targets with airborne hyper spectrometers, thereby greatly improving the perception ability of unmanned aerial vehicles. For this reason, we have carried out research on target data mining based on the advantages of hyperspectral detection of ground object attributes and the strong flexibility of UAVs. First, on the basis of acquiring hyper spectral images, normalize the images, construct an edge extraction model, and introduce the idea of clustering to find spatially similar regions. Then a Dynamic Time Warping model is constructed to extract the features between the spectra, and finally, the DEC algorithm is improved, and a deep network is used to achieve typical target clustering.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Number of references:20
Main heading:Unmanned aerial vehicles (UAV)
Controlled terms:Aircraft detection - Antennas - Clustering algorithms - Data mining - Object detection - Spectroscopy
Uncontrolled terms:Clusterings - Data mining algorithm - Dynamic time warping - Ground objects - HyperSpectral - Hyperspectral target detection - Inter-spectral - Spatial - Spatial resolution - Typical targets
Classification code:652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis
DOI:10.1007/978-981-16-9492-9_7
Funding details: Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 2020M682144, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:Acknowledgments. This work is supported by Postdoctoral Science Foundation of China under Grant No. 2020M682144. Science and Technology Rising Star of Shaanxi Youth under Grant No. 2021KJXX-61.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 361>
Accession number:20221912076571
Title:Retrieval of the planetary boundary layer height from lidar measurements by a deep-learning method based on the wavelet covariance transform (Open Access)
Authors:Mei, Liang (1); Wang, Xiaoqi (1); Gong, Zhenfeng (1); Liu, Kun (1); Hua, Dengxin (1, 2); Wang, Xiaona (3)
Author affiliation:(1) School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian; 116024, China; (2) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (3) School of Physics, Dalian University of Technology, Dalian; 116024, China
Corresponding author:Wang, Xiaona(wangxn@dlut.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:10
Issue date:May 9, 2022
Publication year:2022
Pages:16297-16312
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Understanding and characterization of the planetary boundary layer (PBL) are of great importance in terms of air pollution management, weather forecasting, modelling of climate change, etc. Although many lidar-based approaches have been proposed for the retrieval of the PBL height (PBLH) in case studies, development of a robust lidar-based algorithm without human intervention is still of great challenging. In this work, we have demonstrated a novel deep-learning method based on the wavelet covariance transform (WCT) for the PBLH evaluation from atmospheric lidar measurements. Lidar profiles are evaluated according to the WCT with a series of dilation values from 200 m to 505 m to generate 2-dimensional wavelet images. A large number of wavelet images and the corresponding PBLH-labelled images are created as the training set for a convolutional neural network (CNN), which is implemented based on a modified VGG16 (VGG - Visual Geometry Group) convolutional neural network. Wavelet images obtained from lidar profiles have also been prepared as the test set to investigate the performance of the CNN. The PBLH is finally retrieved by evaluating the predicted PBLH-labelled image and the wavelet coefficients. Comparison studies with radiosonde data and the Micro-Pulse-Lidar Network (MPLNET) PBLH product have successfully validated the promising performance of the deep-learning method for the PBLH retrieval in practical atmospheric sensing.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Number of references:60
Main heading:Optical radar
Controlled terms:Weather forecasting - Convolutional neural networks - Deep learning - Boundary layer flow - Climate change - Convolution - Air pollution - Learning systems - Wavelet transforms - Boundary layers
Uncontrolled terms:Boundary layer heights - Convolutional neural network - Labeled images - Learning methods - Lidar measurements - Lidar profiles - Performance - Planetary boundary layers - Wavelet covariance transform - Wavelet image
Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451 Air Pollution - 461.4 Ergonomics and Human Factors Engineering - 631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 921.3 Mathematical Transformations
Numerical data indexing:Size 2.00E+02m to 5.05E+02m
DOI:10.1364/OE.454094
Funding details: Number: -, Acronym: NASA, Sponsor: National Aeronautics and Space Administration;Number: 2020RQ018, Acronym: -, Sponsor: Dalian High-Level Talent Innovation Program;Number: 62075025, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (62075025); Dalian High-Level Talent Innovation Program (2020RQ018).Acknowledgments. The authors greatly acknowledge Zheng Kong and Teng Ma for the help on the experimental work. The MPLNET project is funded by the NASA Radiation Sciences Program and Earth Observing System. We thank the MPLNET (PI: Carlo Wang) for its effort in establishing and maintaining the EPA-NCU site. The authors also wish to thank editors for the extension of the due date for revision.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 362>
Accession number:20231013694139
Title:Low-light Image Enhancement Method Based on Shifted Window Multi-head Self-attention U-shaped Network
Title of translation:基于移位窗口多头自注意力U型网络的低照度图像增强方法
Authors:Sun, Bangyong (1, 2); Zhao, Xingyun (1); Wu, Siyuan (2); Yu, Tao (2)
Author affiliation:(1) College of Printing, Packaging and Digital Media, Xi’an University of Technology, Xi’an; 710048, China; (2) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology
Abbreviated source title:Dianzi Yu Xinxi Xuebao
Volume:44
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:3399-3408
Language:Chinese
ISSN:10095896
CODEN:DKXUEC
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Considering the difficult problems of brightness enhancement, noise suppression and maintaining texture color consistency in the low-light image enhancement model, a low-light image enhancement method based on the shifted window self-attention mechanism is proposed. Based on the U-shaped structure and the multi-head self-attention model of shifted windows, an image enhancement network composed of encoders, decoders and jump connections is constructed. The feature extraction advantages of the self-attention mechanism are applied to the field of low-light image enhancement and long-term dependence between image feature information is established, which can obtain global features effectively. The proposed method is compared width current popular algorithms in quantitative and qualitative comparison experiments, subjectively, the brightness of the image and noise suppression are significantly improved, and simultaneously better maintains the color information that highlights the texture details by the proposed method. In terms of objective indicators such as Peak Signal-to-Noise Ratio(PSNR), Structural SIMilarity index(SSIM), and Learned Perceptual Image Patch Similarity (LPIPS), which are improved 0.35 dB, 0.041 and 0.031 respectively compared with the optimal values of other methods. The experimental results show that the subjective perception quality and objective evaluation indicators of low-light images can be effectively improved by the proposed method, indicating a certain application value.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:23
Main heading:Image enhancement
Controlled terms:Deep learning - Image texture - Luminance - Signal to noise ratio - Textures
Uncontrolled terms:Attention mechanisms - Attention model - Color consistency - Deep learning - Images processing - Low-light image enhancement - Low-light images - Noise suppression - Shaped structures - U-shaped
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
Numerical data indexing:Decibel 3.50E-01dB
DOI:10.11999/JEIT211131
Funding details: Number: LSIT201801D, Acronym: -, Sponsor: -;Number: 2021GY-027, Acronym: -, Sponsor: -;Number: 62076199, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (62076199), The Key R&D Project of Shaan'xi Province (2021GY-027), The Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences (LSIT201801D)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 363>
Accession number:20224212968107
Title:Spatial domain sparse reconstruction algorithm of sheared beam imaging
Title of translation:剪切光束成像技术稀疏重构算法
Authors:Chen, Ming-Lai (1, 2, 3); Liu, Hui (1, 2, 3); Zhang, Yu (1, 3); Luo, Xiu-Juan (1, 2, 3); Ma, Cai-Wen (1, 2, 3); Yue, Ze-Lin (1, 2); Zhao, Jing (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Chen, Ming-Lai(chenminglai@opt.ac.cn); Ma, Cai-Wen(cwma@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:19
Issue date:October 5, 2022
Publication year:2022
Article number:194201
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Sheared beam imaging (SBI) is considered a computational imaging technique that transmits three sheared coherent laser beamlets for illumination, and a sensor array to receive the intensity of the speckle pattern reflected from the target. The SBI can be used to image remote objects through a turbulent medium with no need of any adaptive optics. However, while imaging low-orbit moving targets, the number of detectors of sensor array required by the receiving system of SBI is very large, and the development of sensor array is difficult and costly. In this work, a spatial domain sparse sampling technique is proposed for the SBI system through transmitting five laser beamlets to illuminate the target carrying more of its spectral information, which can reduce the number of detectors of the sensor array. Firstly, the principle of the sparse imaging technique is deduced. Then, a sparse reconstruction algorithm is studied. The phase difference and amplitude information of the target in the echo signal after sparse sampling can be extracted accurately by searching for the accurate positions of the beat frequency components. The wavefront phases can be demodulated by the least-squares method, and wavefront amplitude can be obtained by the algebraic operation of speckle amplitude. The reconstructed wavefront is used to formulate the two-dimension image of the target. Theoretically, without affecting the resolution, the number of detectors of the sensor array can be reduced to half of the traditional three-beam method, which breaks through the limitation that the detector spacing of sensor array is equal to the shear length of beamlet. From the simulation results, when the number of detectors of the sensor array is reduced by 50%, the proposed sparse reconstruction algorithm has almost the same quality as the reconstructed image with the traditional three-beam method.<br/></div> © 2022 Chinese Physical Society.
Number of references:27
Main heading:Compressed sensing
Controlled terms:Adaptive optics - Algebra - Computational Imaging - Image reconstruction - Least squares approximations - Speckle - Wavefronts
Uncontrolled terms:Beam imaging - Beamlets - Reconstruction algorithms - Sensors array - Sheared beam imaging - Sparse reconstruction - Sparse reconstruction algorithm - Sparse sampling - Spatial domain sparse sampling - Spatial domains
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 746 Imaging Techniques - 921.1 Algebra - 921.6 Numerical Methods
Numerical data indexing:Percentage 5.00E+01%
DOI:10.7498/aps.71.20220494
Funding details: Number: 2020JQ-438, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Project supported by the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2020JQ-438).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 364>
Accession number:20211310144189
Title:Using Triple Collocation Observations to Estimate Satellite Measurement Noise
Authors:Chen, Jun (1); Quan, Wenting (2); Wang, Kexin (3); Han, Qijin (4); Liu, Jia (5); Xing, Qianguo (6); Xu, Na (7)
Author affiliation:(1) School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Shaanxi Meteorological Service Center of Agricultural Remote Sensing and Economic Crop, Xi'an; 71000, China; (3) School of Ocean Sciences, China University of Geosciences, Beijing; 100083, China; (4) School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (5) Key Laboratory of Spectral Imaging Technology of Cas, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 71000, China; (6) Chinese Academy of Sciences, Yantai Institute of Coastal Zone Research, Yantai; 264003, China; (7) National Satellite Meteorological Center, China Meteorological Administration, Beijing; 100081, China
Corresponding authors:Chen, Jun(chenjun@xjtu.edu.cn); Xu, Na(xuna@cma.gov.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Knowing how much measurement noise is in a signal is critical for evaluating the overall performance of a satellite observation. We developed a triple collocation observation (TCO) algorithm for estimating measurement noise by collocation comparing the local deviations of three satellite data sets. When we evaluated our algorithm with a synthetic data set, the results showed that the algorithm effectively derived measurement noise from satellite signals despite the many intermission signal differences among the satellites. The TCO algorithm produced <6.66% uncertainty in the measurement noise estimates that we derived from the synthetic data set. In addition, to maximally isolate measurement noise from ocean color images, we developed a set of data quality control criteria to apply when identifying synchronous pixel pairs. Using images from the Medium Resolution Spectral Imager II (MERSI II), the Visible Infrared Imaging Radiometer Suite (VIIRS), and the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments, we applied our data quality control criteria and found that the TCO algorithm produced measurement noise consistent with the measured prelaunch or specifications for VIIRS and MERSI II instrument noise. However, the TCO measurement noise was significantly lower than the spaced MODIS noise because MODIS's extended service time likely produced instrument degradation. Overall, MODIS performed better than MERSI II but worse than VIIRS. Furthermore, we found that the residual error in remote sensing reflectance exponentially decreased as the measurement signal-to-noise ratio (MSNR) increased. Because of this exponential relationship, the MSNR should not be lower than 181 to achieve the <5% uncertainty goal of remote sensing reflectance at 443 nm that NASA proposed. Our results suggest that the TCO algorithm is an effective approach for comprehensively estimating and comparing instrument performance.<br/></div> © 1980-2012 IEEE.
Number of references:48
Main heading:Remote sensing
Controlled terms:Quality control - Spectroscopy - Radiometers - Thermography (imaging) - NASA - Uncertainty analysis - Signal to noise ratio - Satellite imagery - Reflection
Uncontrolled terms:Effective approaches - Instrument performance - Medium resolution spectral imager - Moderate resolution imaging spectroradiometer - Remote-sensing reflectance - Satellite measurements - Satellite observations - Visible infrared imaging radiometer suites
Classification code:655.2 Satellites - 716.1 Information Theory and Signal Processing - 742.1 Photography - 913.3 Quality Assurance and Control - 922.1 Probability Theory - 944.7 Radiation Measuring Instruments
Numerical data indexing:Size 4.43e-07m
DOI:10.1109/TGRS.2021.3060781
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 365>
Accession number:20224012840724
Title:Simulations of the Radiative Lifetime in Surface Acoustic Wave driven Piezoelectric Semiconductor Devices
Authors:Pang, Ziliang (1, 2); Cao, Weiwei (1); Bai, YongLin (1)
Author affiliation:(1) Chinese Academy of Sciences, Key Laboratory of Ultra-Fast Photoelectric Diagnostics Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) The University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Bai, YongLin(baiyonglin@opt.ac.cn)
Source title:2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Abbreviated source title:Int. Conf. Electron. Packag. Technol., ICEPT
Part number:1 of 1
Issue title:2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665499057
Document type:Conference article (CA)
Conference name:23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Conference date:August 10, 2022 - August 13, 2022
Conference location:Dalian, China
Conference code:182631
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The traveling wave potential wells that are generated from a surface acoustic wave in the piezoelectric materials of semiconductor efficiently trap the created electron hole pairs, which is a potential method of the single-photon detectors. In this study, we report on a model that is used to study the correlation between radiative lifetime and periodical potential wells. We devised a Python program to numerically find the eigenstates in 1D periodical potential well system. The Schrödinger equation is solved to obtain electron and hole wave functions that are related to charge distribution. Then, we analyzed the impact of the potential well on the corresponding radiative lifetime of the system.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Particle beams
Controlled terms:Acoustic surface wave devices - Acoustic waves - Computer software - Photodetectors - Photons - Piezoelectricity - Semiconductor devices - Wave functions
Uncontrolled terms:Electron hole pairs - Piezoelectric - Piezoelectric semiconductors - Potential methods - Potential wells - Radiative lifetime - Single-photon detectors - Surface acoustic waves - Travelling waves - Wave potentials
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 723 Computer Software, Data Handling and Applications - 751.1 Acoustic Waves - 752.1 Acoustic Devices - 921 Mathematics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
DOI:10.1109/ICEPT56209.2022.9873441
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 366>
Accession number:20223712723129
Title:Rocket active drift measurement technology based on lidar
Title of translation:基于激光雷达的火箭主动漂移量测量技术
Authors:Shi, Heng (1, 2, 3); Gao, Xin (1); Li, Xiyu (1); Lei, Chengqiang (1); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1); Tang, Jia (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Scienses, Xi’an; 710119, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin0526@163.com)
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:51
Issue:7
Issue date:July 2022
Publication year:2022
Article number:20210636
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">In view of the problems existing in the current high-speed TV rendezvous measurement of rocket drift, such as the great influence of the external environment and the inability to obtain the measurement data in real time, an active measurement method of rocket takeoff real-time drift based on lidar is proposed. First, the lidar is installed on the two-dimensional precision turntable through the installation platform. In the process of rocket launch, the two-dimensional precision turntable drives the lidar to continuously track and scan the target point position of the rocket with high precision, and obtain the lidar point cloud data corresponding to the target point position. Then, the data processing system receives the lidar point cloud data, fits the elliptical curve and the elliptical curve center point of each frame data, takes the position of the elliptical center point when the rocket is stationary as the reference position, calculates the relative difference between the elliptical center point position of each frame data and the reference position, and determines the real-time drift of the rocket in the take-off stage. Finally, the measurement system and method are verified by the rocket launch test, and the test results show that under the condition of environmental interference, the measurement accuracy of real-time drift is 3.1 cm. It is the most accurate measurement method in the rocket drift measurement at present. At the same time, it can ensure the real-time performance of the data, provide real-time discrimination data for the rocket launch security console, and ensure the safety of the launch process.<br/></div> © 2022 Chinese Society of Astronautics. All rights reserved.
Number of references:15
Main heading:Curve fitting
Controlled terms:Data handling - Digital storage - Optical radar - Rockets
Uncontrolled terms:Center points - Curves fittings - Dimensional precision - Measurement accuracy - Measurement methods - Real- time - Rocket drift - Rocket launch - Time drift - Two-dimensional
Classification code:654.1 Rockets and Missiles - 716.2 Radar Systems and Equipment - 722.1 Data Storage, Equipment and Techniques - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 921.6 Numerical Methods
Numerical data indexing:Size 3.10E-02m
DOI:10.3788/IRLA20210636
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 367>
Accession number:20214611167785
Title:A New Method for Direct Measurement of Polarization Characteristics of Water-Leaving Radiation
Authors:Liu, Jia (1); Jia, Xinyin (1); He, Xianqiang (2); Wang, Yihao (1); Zhu, Qiankun (1); Li, Haiwei (1); Zou, Chunbo (1); Chen, Tieqiao (1); Feng, Xiangpeng (1); Zhang, Geng (1); Li, Siyuan (1); Hu, Bingliang (1); Pan, Delu (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The polarization characteristics of water-leaving radiation, which contain rich information on oceanic constituents, have often been neglected. Due to the lack of suitable instruments and practical difficulties in removing strong contamination by polarized skylight, direct measurement of the polarization of water-leaving radiation remains a challenge. In this study, we designed an above-water instrument (named POLWR) to directly measure the polarization of water-leaving radiation and examined its field application in Qiandao Lake, China. Results showed that the Stokes components of water-leaving radiance ( L-{w} ) measured by POLWR were consistent with the radiative transfer (RT) simulations, with a determination coefficient ( R^{2} ) and mean relative error of 0.67 and 18.86%, respectively. The Qiandao Lake results revealed that the degree of polarization (DOP) of L-{w} varied from 0.05 to 0.5 within the 412-865-nm range. Moreover, a good relationship between the polarized remote sensing reflectance ( R-{\mathrm {rsp}} ), and DOP and chlorophyll-A (Chla) concentration was found at 368 nm in this productive lake, indicating great potential for the inversion of oceanic constituents from polarization signals. With its small size and direct measurement ability, the POLWR instrument should be widely applicable and could help improve our understanding of the polarization characteristics of water-leaving radiation and the underwater light field.<br/></div> © 1980-2012 IEEE.
Number of references:88
Main heading:Polarization
Controlled terms:Remote sensing - Lakes - Radiative transfer
Uncontrolled terms:Direct measurement - Extraterrestrial measurements - Field instruments - Measurements of - Polarization characteristics - Polarization-based algorithm - Pollution measurement - Radiative transfer simulations - Sea measurements - Water-leaving radiances
Classification code:701 Electricity and Magnetism
Numerical data indexing:Percentage 1.886E+01%, Percentage 6.70E-01%, Size 3.68E-07m, Size 8.65E-07m
DOI:10.1109/TGRS.2021.3126926
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 368>
Accession number:20222412229938
Title:Influence of exposure time on image reconstruction by lensless imaging technology
Authors:Yao, Xiaopeng (1, 2); Liu, Muyuan (1, 2); Su, Xiuqin (1, 3); Zhu, Wenhua (1, 2, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:2022 7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Abbreviated source title:Int. Conf. Intell. Comput. Signal Process., ICSP
Part number:1 of 1
Issue title:2022 7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Issue date:2022
Publication year:2022
Pages:1978-1981
Language:English
ISBN-13:9781665478571
Document type:Conference article (CA)
Conference name:7th International Conference on Intelligent Computing and Signal Processing, ICSP 2022
Conference date:April 15, 2022 - April 17, 2022
Conference location:Xi'an, China
Conference code:179503
Sponsor:IEEE
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The quality of the reconstructed image from lensless imaging is affected by the exposure time. This paper explores the influence of exposure time on imaging technology. Based on the lensless imaging system established by us, we compare and analyze the objective evaluation indexes of reconstructed images under different exposure times, which proves that our lensless imaging system is suitable for all-weather application fields.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Image reconstruction
Controlled terms:Imaging systems
Uncontrolled terms:Application fields - Compare and analyze - Evaluation index - Exposure-time - Images reconstruction - Imaging technology - Lens-less imaging - Lensless - Objective evaluation - Reconstructed image
Classification code:746 Imaging Techniques
DOI:10.1109/ICSP54964.2022.9778316
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:ACKNOWLEDGMENT Authors would like to thank the strategic high-tech innovation fund of CAS for its support.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 369>
Accession number:20224413023815
Title:Quantitative atmospheric phase jitter simulating research of optic field imaging (Open Access)
Authors:Cheng, Zhiyuan (1); Li, Zhiguo (1); Ji, Zhou (2); Yan, Peipei (1); Xia, Aili (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechnics of Chinese Academy of Science, Cas Key Laboratory of Space Precision Measurement Technology, China; (2) Unversity of Chinese Academy of Sciences, China; (3) Xi'an Institute of Optics and Precision Mechnics of Chinese Academy of Science, China
Corresponding author:Cheng, Zhiyuan(czy@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:Proceedings of 2022 2nd International Conference on Control and Intelligent Robotics, ICCIR 2022
Issue date:June 24, 2022
Publication year:2022
Pages:231-234
Language:English
ISBN-13:9781450397179
Document type:Conference article (CA)
Conference name:2nd International Conference on Control and Intelligent Robotics, ICCIR 2022
Conference date:June 24, 2022 - June 26, 2022
Conference location:Virtual, Online, China
Conference code:183400
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">The laser field imaging telescope emits laser coherent field to detect space targets. When laser passes through the atmospheric transmission path, the laser is inevitably affected by the phase jitter of atmosphere. Atmospheric phase jitter varies randomly and it is difficult to be quantitatively simulated. In order to quantitatively research the influence of atmospheric phase jitter on imaging quality, a quantitative simulation method of atmospheric phase jitter based on the change of beam frequency difference was proposed. A set of atmospheric turbulence phase jitter quantitative numerical simulation experimental platform was constructed. The effect of different phase jitter on the imaging quality of laser field imaging was quantitatively studied. The results show that the larger the atmospheric phase jitter is, the more degraded the image quality is. We suggest that the atmospheric phase jitter should be suppressed in the signal reconstruction. The quantitative simulation method of atmospheric phase jitter provides an effective technique for studying the image quality of light field imaging.<br/></div> © 2022 ACM.
Number of references:8
Main heading:Atmospheric turbulence
Controlled terms:Jitter - Signal reconstruction - Simulation platform
Uncontrolled terms:Atmospheric phase jitter - Coherent fields - Field imaging - Imaging quality - Laser field imaging - Laser fields - Optic fields - Quantitative simulating experiment - Quantitative simulation - Simulating experiments
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 723.5 Computer Applications
DOI:10.1145/3548608.3559198
Funding details: Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China Grant No: 61875257 and the Natural Science Foundation of Shaanxi Province China Grant No: 2017JM6035. The research was also supported by the Open Resaech Fund of CAS Key Laboratory of Space Precision Measurement Technology Grant No: CXJJ-21S042.The author would like to thank Zhang Yu for technical support.The work was supported by Natural Science Foundation of China (Grant No: 61875257)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 370>
Accession number:20224813183598
Title:Fluid-Thermal Interaction Simulation of a Hypersonic Aircraft Optical Dome (Open Access)
Authors:Wang, Zhiqiang (1); Zhang, Anjing (2); Pan, Jia (1); Lu, Weiguo (1); Sun, Yubiao (3)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of Cas, Xi’an; 710119, China; (2) School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an; 710072, China; (3) Engineering Department, University of Cambridge, Trumpington Street, Cambridge; CB2 1PZ, United Kingdom
Corresponding authors:Wang, Zhiqiang(wangzhiqiang@opt.ac.cn); Sun, Yubiao(ys572@cam.ac.uk)
Source title:Energies
Abbreviated source title:Energies
Volume:15
Issue:22
Issue date:November 2022
Publication year:2022
Article number:8619
Language:English
E-ISSN:19961073
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Hypersonic aircraft design is an enabling technology. However, many problems are encountered, including the design of the hood. The aircraft optical dome can become heated due to aerodynamic effects. Since the optical dome of a hypersonic aircraft should satisfy optical imaging requirements, a conventional ablative coating cannot be adopted. The aerodynamic heating characteristics during the whole flight must be studied. In this study, a numerical simulation method for the aerodynamic heat of hypersonic aircraft under long-term variable working conditions is proposed. In addition, the numerical simulation of the external flow field and structure coupling of the aerodynamic heat problem is performed. The dynamic parameters of temperature and pressure are obtained, and the thermal protection basis of the internal equipment is obtained. Numerical results indicate that the average temperature and maximum temperature of the optical dome for inner and outer walls exhibit an "M" shape with time, with two high-temperature cusps and one low-temperature cusp. The time of average temperature coincides with that of maximum wall temperature. During the flight, the wall pressure changes with time, exhibiting the characteristics of higher temperature at both ends of the flight and lower temperature in the middle. The structural temperature of the hypersonic aircraft is higher than that of the external flow behind the shock wave after 310 s. Therefore, this study provides a reliable reference for the preliminary design and parameter research of optical domes of hypersonic aircraft.<br/></div> © 2022 by the authors.
Number of references:20
Main heading:Temperature
Controlled terms:Aerodynamic heating - Domes - Hypersonic aerodynamics - Hypersonic flow - Hypersonic vehicles - Numerical methods - Numerical models - Shock waves
Uncontrolled terms:Aerodynamic effect - Aircraft design - Enabling technologies - Fluid-thermal simulation - Highest temperature - Interaction simulations - Lows-temperatures - Optical domes - Thermal interaction - Thermal simulations
Classification code:408.2 Structural Members and Shapes - 631.1 Fluid Flow, General - 641.1 Thermodynamics - 651.1 Aerodynamics, General - 652.1 Aircraft, General - 655.1 Spacecraft, General - 921 Mathematics - 921.6 Numerical Methods - 931 Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Time 3.10E+02s
DOI:10.3390/en15228619
Funding details: Number: E229321201, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:This research was funded by Youth Innovation Promotion Association, XIOPM, CAS (no. E229321201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 371>
Accession number:20224513074945
Title:Stray Light Characteristics and Suppression in Space-borne Doppler Asymmetric Spatial Heterodyne Interferometer
Title of translation:星载多普勒差分干涉仪杂散光特性与抑制
Authors:Li, Junjie (1, 2); Sun, Jian (1); Zhao, Hengxiang (1); Chang, Chenguang (1, 2); Fu, Di (1, 2); Zhao, Hao (1); Bai, Lu (3); Feng, Yutao (1)
Author affiliation:(1) Xi′an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi′an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Optoelectronic Engineering, Xidian University, Xi′an; 710071, China
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1130002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Wind detection in middle and upper atmosphere is an important way to characterize atmospheric environment and atmospheric dynamics， which is significant for accurate weather forecast and smooth operation of aerospace missions. Satellite remote sensing of the atmospheric wind field is not limited by weather and geographical conditions， and can be used for global all-weather remote sensing observation. More importantly， using limb viewing geometry can provide long-term observation results of the global horizontal wind field and temperature distribution， which is necessary for studying large-scale and long-term space climate. Compared with Michelson interferometer and Fabry-Perot interferometer， the Doppler asymmetric spatial heterodyne interferometer has higher sensitivity， no moving parts and lower processing accuracy requirements. These advantages can greatly improve the performance of the system， and are very suitable for wind field detection activities in the middle and upper atmosphere. The space-borne wind interferometer is designed to detect the weak airglow emissions employing limb viewing geometry， which can be easily affected by background radiation from the lower atmosphere. The earth's atmosphere is composed of a variety of gases and aerosol particles. These components enable the atmosphere to absorb and scatter the incident solar radiation， which constitutes the atmospheric background radiation. The stray light will degrade the quality of the original interferogram data， decreasing the contrast and effective signal-to-noise ratio. This paper uses a satellite based on 500 km orbital altitude to measure the winds in the middle atmosphere at the height of 60~90 km， and the typical atmospheric background radiation and airglow radiation intensity are selected. The detection range of the above loads is in the upper atmosphere， and the observation of wind field in the middle atmosphere （60~90 km） will put forward higher requirements for the suppression of stray light. In addition， the multistage diffraction energy of Doppler interferometer should be analyzed. According to the atmospheric background radiation intensity at different altitudes， combined with the optical system parameters， the baffle is designed. The primary purpose of the baffle is the suppression of signal that originates from angles outside the field of view since the illuminated earth’s disk and the sun represent light sources that are many orders of magnitude brighter than the targeted airglow emissions， and during the day， the bright earth is always close to the fields of view. The adopted criterion is that the entrance aperture in front of the first lens should not receive light directly from the sunlit cloud tops， which is assumed to be 20 km altitude. In order to suppress the stray light in the field of view， the optical system is simulated to find the key surfaces which can cause the ghost image in the interferometer and the suppression structure is made. For the stray light of the interferometer multistage diffraction， simulation of rays tracing is taken to evaluate the influence on imaging. In order to evaluate the stray light suppression effect， point source transmittance analysis and illumination simulation are taken. The point source transmittance is the ratio of the illuminance at the image surface to the illuminance at the entrance pupil. The image surface illuminance map is obtained by simulating the airglow light source and the atmospheric background radiation light source. Through point source transmittance analysis and illumination simulation， the following conclusions are obtained. First， in the horizontal and diagonal directions， the point source transmittance drops below 10<sup>-5</sup> at 0.2° outside the field of view， and in the vertical direction， the point source transmittance drops below 10<sup>-5</sup> at 0.04° outside the field of view. Second， the atmospheric background radiation and ghost image account for 1.35% of the total energy of the image. The results show that the proposed stray light suppression method is effective and meets the requirements of the satellite-borne Doppler asymmetric spatial heterodyne interferometer.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:19
Main heading:Stray light
Controlled terms:Fabry-Perot interferometers - Infrared radiation - Light sources - Michelson interferometers - Optical remote sensing - Optical systems - Orbits - Signal to noise ratio
Uncontrolled terms:Applied optics - Atmospheric background radiation - Background radiation - Baffle design - Dopple asymmetric spatial heterodyne interferometer - Doppler - Field of views - Heterodyne interferometer - Spatial heterodyne - Stray light suppression
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Percentage 1.35E+00%, Size 2.00E+04m, Size 5.00E+05m, Size 6.00E+04m to 9.00E+04m
DOI:10.3788/gzxb20225111.1130002
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E1294301, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China （No. 41005019）， West Light Foundation of the Chinese Academy of Sciences （No. XAB 2016A07）， Natural Science Basic Research Program of Shaanxi Province （No. 2019JQ-931）， West Light Cross-Disciplinary Innovation Team of Chinese Academy of Sciences （No. E1294301）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 372>
Accession number:20231113697428
Title:Active Tuning and Anisotropic Strong Coupling of Terahertz Polaritons in Van der Waals Heterostructures (Open Access)
Authors:Li, Shaopeng (1, 2); Xu, Junhao (1); Xie, Yajie (1)
Author affiliation:(1) Department of Physics, Shaanxi University of Science and Technology, Xi’an; 710021, China; (2) State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Corresponding author:Li, Shaopeng(lishaopeng@sust.edu.cn)
Source title:Micromachines
Abbreviated source title:Micromachines
Volume:13
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1955
Language:English
E-ISSN:2072666X
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Electromagnetic field confinement is significant in enhancing light-matter interactions as well as in reducing footprints of photonic devices especially in Terahertz (THz). Polaritons offer a promising platform for the manipulation of light at the deep sub-wavelength scale. However, traditional THz polariton materials lack active tuning and anisotropic propagation simultaneously. In this paper, we design a graphene/α-MoO<inf>3</inf> heterostructure and simulate polariton hybridization between isotropic graphene plasmon polaritons and anisotropic α-MoO<inf>3</inf> phonon polaritons. The physical fundamentals for polariton hybridizations depend on the evanescent fields coupling originating from the constituent materials as well as the phase match condition, which can be severely affected by the α-MoO<inf>3</inf> thickness and actively tuned by the gate voltages. Hybrid polaritons propagate with in-plane anisotropy that exhibit momentum dispersion characterized by elliptical, hyperboloidal and even flattened iso-frequency contours (IFCs) in the THz range. Our results provide a tunable and flexible anisotropic polariton platform for THz sensing, imaging, and modulation.<br/></div> © 2022 by the authors.
Number of references:26
Main heading:Polariton
Controlled terms:Anisotropy - Dispersion (waves) - Evanescent fields - Graphene - Phonons - Photonic devices - Photons - Van der Waals forces
Uncontrolled terms:Active tuning - Anisotropic propagation - Dispersion engineering - Hybridisation - Light-matter interactions - Polariton hybridization - Polaritons - Strong-coupling - Tera Hertz - Van der Waal
Classification code:701 Electricity and Magnetism - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 801.4 Physical Chemistry - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.3390/mi13111955
Funding details: Number: 62005151, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was funded by the National Natural Science Foundation of China (NSFC), grant number 62005151.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 373>
Accession number:20214911260464
Title:Abnormal event detection by a weakly supervised temporal attention network (Open Access)
Authors:Zheng, Xiangtao (1); Zhang, Yichao (1, 2); Zheng, Yunpeng (1, 2); Luo, Fulin (3); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:CAAI Transactions on Intelligence Technology
Abbreviated source title:CAAI Trans. Intell. Technol.
Volume:7
Issue:3
Issue date:September 2022
Publication year:2022
Pages:419-431
Language:English
ISSN:24686557
E-ISSN:24682322
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Abnormal event detection aims to automatically identify unusual events that do not comply with expectation. Recently, many methods have been proposed to obtain the temporal locations of abnormal events under various determined thresholds. However, the specific categories of abnormal events are mostly neglect, which are important to help in monitoring agents to make decisions. In this study, a Temporal Attention Network (TANet) is proposed to capture both the specific categories and temporal locations of abnormal events in a weakly supervised manner. The TANet learns the anomaly score and specific category for each video segment with only video-level abnormal event labels. An event recognition module is exploited to predict the event scores for each video segment while a temporal attention module is proposed to learn a temporal attention value. Finally, to learn anomaly scores and specific categories, three constraints are considered: event category constraint, event separation constraint and temporal smoothness constraint. Experiments on the University of Central Florida Crime dataset demonstrate the effectiveness of the proposed method.<br/></div> © 2021 The Authors. CAAI Transactions on Intelligence Technology published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology and Chongqing University of Technology.
Number of references:51
Main heading:Image segmentation
Uncontrolled terms:Abnormal event detections - Event recognition - Human detection - Learn+ - Monitoring agents - Separation constraints - Smoothness constraints - University of Central Florida - Video analysis - Video segments
DOI:10.1049/cit2.12068
Funding details: Number: 2020KJXX‐091, Acronym: -, Sponsor: -;Number: 61772510,61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDY‐SSW‐JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Funding text:This work was supported in part by the National Science Fund for Distinguished Young Scholars under grant no. 61925112, in part by the National Natural Science Foundation of China under grant no. 61806193 and grant no. 61772510, in part by the Innovation Capability Support Program of Shaanxi under grant no. 2020KJXX‐091, and in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences under grant no. QYZDY‐SSW‐JSC044.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 374>
Accession number:20224613098875
Title:All-optical sampling of ultrashort laser pulses based on perturbed transient grating
Authors:Huang, Pei (1); Yuan, Hao (1, 2); Cao, Huabao (1, 2); Wang, Hushan (1, 2); Wang, Xianglin (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Fu, Yuxi (1, 2)
Author affiliation:(1) Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Fu, Yuxi(fuyuxi@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:20
Issue date:October 15, 2022
Publication year:2022
Pages:5369-5372
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We propose and demonstrate an all-optical pulse sampling technique based on the transient grating (TG) procedure with perturbation, which provides a simple and robust manner to characterize an ultrashort laser pulse without employing a retrieval algorithm. In our approach, a two-orders weaker perturbation pulse perturbs the diffracted pulse from the TG, which is generated by another strong fundamental pulse. The modulation of the diffracted pulse energy directly represents the temporal profile of the perturbation pulse. We have successfully characterized few-cycle and multi-cycle pulses, which is consistent with the results verified by the widely employed frequency-resolved optical gating (FROG) method. Our method provides a potential way to characterize ultrashort laser waveform from the deep-UV to far-infrared region.<br/></div> © 2022 Optica Publishing Group.
Number of references:27
Main heading:Ultrashort pulses
Controlled terms:Signal sampling
Uncontrolled terms:All optical - All-optical sampling - Fundamental pulse - Pulse energies - Retrieval algorithms - Sampling technique - Simple++ - Temporal profile - Transient grating - Weak perturbation
Classification code:723.2 Data Processing and Image Processing - 922 Statistical Methods
DOI:10.1364/OL.473294
Funding details: Number: J20-021-III,J21-029-III, Acronym: -, Sponsor: -;Number: S19-020-III, Acronym: -, Sponsor: -;Number: 202005YK01, Acronym: -, Sponsor: -;Number: 12104501,61690222,62175256,92050107, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J22-083-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: WCH2021002, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China (12104501, 61690222, 62175256, 92050107); Youth Innovation Promotion Association XIOPM-CAS (WCH2021002); Natural Science Basic Research Program of Shaanxi Province (2019JCW-03); Pioneer Initiative Project of CAS (J22-083-III); Innovation Team in Shaanxi Province (J21-029-III); Major Science and Technology Infrastructure Pre-Research Program of the CAS (J20-021-III); Science and Technology Program of Xi’an (202005YK01); Key Deployment Research Program of XIOPM (S19-020-III). We acknowledge Prof. Liang-Wen Pi from XIOPM for beneficial discussions.Funding. National Natural Science Foundation of China (12104501, 61690222, 62175256, 92050107); Youth Innovation Promotion Association XIOPM-CAS (WCH2021002); Natural Science Basic Research Program of Shaanxi Province (2019JCW-03); Pioneer Initiative project of CAS (J22-083-III); Innovation team in Shaanxi Province (J21-029-III); Major Science and Technology Infrastructure Pre-research Program of the CAS (J20-021-III); Science and Technology Program of Xi’an (202005YK01); Key Deployment Research Program of XIOPM (S19-020-III).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 375>
Accession number:20223212542425
Title:Second-harmonic generation in a high-index doped silica micro-ring resonator
Authors:Li, Yuhua (1, 2); Wang, Shao Hao (3); Ho, Wai Lok (2); Zhu, Xiaotian (2); Wang, Xiang (4); Davidson, Roy R. (4); Little, Brent E. (5); Chen, Rui-Pin (1); Chu, Sai Tak (2)
Author affiliation:(1) Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou; 310018, China; (2) Department of Physics, City University of Hong Kong, Kowloon Tong, 999077, Hong Kong; (3) Department of Microelectronics Science and Technology, Fuzhou University, Qi Shan Campus, Fuzhou; 350108, China; (4) QXP Technology, Xi'an; 710311, China; (5) State Key Laboratory of Transient Optics and Photonics, XIOPM, CAS, Xi'an; 710119, China
Corresponding author:Chu, Sai Tak(saitchu@cityu.edu.hk)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:15
Issue date:August 1, 2022
Publication year:2022
Pages:3884-3887
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We report the first, to the best of our knowledge, observation of second-harmonic generation (SHG) in a high-index doped silica micro-ring resonator, due to the symmetry-breakinginduced χ(2) at the core and cladding interface of the waveguide. The generated SH power is shown to have quadratic dependence on the in-cavity power of the fundamental pump at around 1550 nm. The pumping wavelength sweep method is adopted to fulfill the phase-matching condition for maximum conversion efficiency of SHG. This work offers a new approach to generate a visible source for the visible-light integrated optical platform from infrared-visible light conversion.<br/></div> © 2022 Optica Publishing Group.
Number of references:29
Main heading:Harmonic generation
Controlled terms:Conversion efficiency - Light - Optical frequency conversion - Optical resonators - Phase matching - Silica
Uncontrolled terms:1550 nm - Cladding interfaces - Core interfaces - Doped silicas - Higher index - Microring Resonator (MRR) - Power - Pumping wavelength - Quadratic dependence - Visible light
Classification code:525.5 Energy Conversion Issues - 713 Electronic Circuits - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.55E-06m
DOI:10.1364/OL.463317
Funding details: Number: SRG-Fd 7005599, Acronym: -, Sponsor: City University of Hong Kong;Number: 11874323,62105291, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11430131282104, Acronym: ZSTU, Sponsor: Zhejiang Sci-Tech University;
Funding text:Funding. National Natural Science Foundation of China (62105291, 11874323); Zhejiang Sci-Tech University (11430131282104); City University of Hong Kong (SRG-Fd 7005599).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 376>
Accession number:20223712717629
Title:Study on multi-beam laser coherent imaging system
Authors:Liu, Hui (1, 2, 3); Gao, Xin (4); Luo, Xiu-Juan (1, 3); Zhang, Yu (1, 2, 3); Chen, Ming-Lai (1, 2, 3); Yue, Ze-Lin (2, 3)
Author affiliation:(1) Xìan Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Cas Key Laboratory of Space Precision Measurement Techlolgy, Xian, China; (4) Key-Laboratory of Space Object Measurement, Beijing Institute of Tracking and Telecommunications Technology, Beijing, China
Corresponding author:Gao, Xin(gaoxin526@sina.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12307
Part number:1 of 1
Issue title:Second Optics Frontier Conference
Issue date:2022
Publication year:2022
Article number:123070H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510656765
Document type:Conference article (CA)
Conference name:2nd Optics Frontier Conference
Conference date:May 23, 2022 - May 27, 2022
Conference location:Virtual, Online
Conference code:182271
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Coherent imaging with multi-beam laser is considered as a key technique in ground based imaging. In the paper, the composition of multi-beam laser coherent imaging system is demonstrated in detail, the constraints between subsystem parameters are analyzed, and the array layout of multi-beam laser imaging transmitter is proposed. In the system, the laser aiming accuracy has an important impact on the imaging. The theoretical simulation indicates that the aiming error of the emitter array should be controlled within 5%. Finally, Design equivalent aperture as φ1.5m experimental system and Imaging target successfully, verifying the correctness and feasibility of the system, and promoting the implementation of multi-beams coherent imaging technology.<br/></div> © 2022 SPIE.
Number of references:12
Main heading:Imaging systems
Uncontrolled terms:Array layout - Coherent imaging - Coherent imaging systems - Ground based - High-resolution imaging - Laser coherent imaging - Laser imaging - Multibeams - Pointing errors - T array
Classification code:746 Imaging Techniques
Numerical data indexing:Percentage 5.00E+00%
DOI:10.1117/12.2644089
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 377>
Accession number:20220449368
Title:Spectral Beam Combing of Fiber Lasers with 32 Channels
Authors:Gao, Qi (1, 2); Li, Zhe (1, 2); Zhao, Wei (1); Li, Gang (1, 2); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi’an Aeronautical University, Xi’an; 710077, China
Corresponding author:Gao, Qi
Source title:SSRN
Issue date:December 1, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method for spectral combination of fiber lasers with extremely high spectral density, increasing spectral density utilization with no degradation in beam quality, and decreasing the single channel narrow linewidth output power. Experiments demonstrating the utility of our method are described. The results show that we achieve 32 channels fiber laser spectral beam combining (SBC) with a beam quality of M2 =1.68. The beam quality of SBC can be optimized constantly by varying the spectral interval integrally with the feedback system. Our method is potentially scalable to many 100’s of channels and achieves tens or hundreds of kW output power with an excellent beam quality.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Fiber lasers
Controlled terms:Fibers - Spectral density
Uncontrolled terms:Beams quality - Feedback systems - Narrow-line width - Output power - Single channels - Spectral beam combing - Spectral beam combining - Spectral beams - Spectral combination - Superfluorescent source
Classification code:744.4 Solid State Lasers
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4291145
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 378>
Accession number:20220811698622
Title:Advances in Silica-Based Large Mode Area and Polarization-Maintaining Photonic Crystal Fiber Research (Open Access)
Authors:Ma, Yuan (1, 2); Wan, Rui (1, 2); Li, Shengwu (1, 2); Yang, Liqing (1); Wang, Pengfei (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Materials
Abbreviated source title:Mater.
Volume:15
Issue:4
Issue date:February-2 2022
Publication year:2022
Article number:1558
Language:English
E-ISSN:19961944
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, photonic crystal fibers (PCFs) have attracted increasing attention. Compared with traditional optical fibers, PCFs exhibit many unique optical properties and superior performance due to their high degree of structural design freedom. Using large-mode area (LMA) fibers with single-mode operation is essential to overcoming emerging problems as the power of fiber lasers scales up, which can effectively reduce the power density and mitigate the influence of nonlinear effects. With a brief introduction of the concept, classification, light transmission mechanism, basic properties, and theoretical analysis methods of PCFs, this paper mainly compiles the worldwide development of large-mode area and polarization-maintaining (PM) PCFs, and finally proposes possible technical routes to realize the single-mode operation of LMA-PCFs and PM-LMA-PCFs. Finally, the future development prospects of the PCFs are discussed.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:93
Main heading:Photonic crystal fibers
Controlled terms:Nonlinear optics - Polarization - Structural design - Polarization-maintaining fiber - Silica - Fiber lasers - Light transmission - Optical properties - Crystal whiskers
Uncontrolled terms:Design freedom - High power fibre laser - Large mode area - Large-mode-area photonic crystal fibers - Microstructures fibers - Performance - Photonic-crystal fiber - Polarization maintaining - Polarization-maintaining photonic crystal fiber - Single mode operation
Classification code:408.1 Structural Design, General - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 744.4 Solid State Lasers - 933.1.1 Crystal Lattice - 951 Materials Science
DOI:10.3390/ma15041558
Funding details: Number: 2017446, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This research was funded by Shaanxi Provincial Key Research and Development Program (grant number 2021GY-251) and Youth Innovation Promotion Association, CAS (grant number 2017446).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 379>
Accession number:20224413019080
Title:Design and testing of the structure of the eXTP optics
Authors:Song, Z.Y. (1); Ma, J. (1); Wang, J. (1); Zhang, A.M. (1); Wang, Y.S. (1); Yang, Y.J. (1); Jiang, W.C. (1); Chen, Y. (1); Yu, K. (1); Yang, S. (1); Xu, Y.P. (1); He, H.L. (1); Lu, F.J. (1); Zhang, S.N. (1); Basso, S. (2); Civitani, M. (2); Pareschi, G. (2); Sironi, G. (2); Spiga, D. (2); Cotroneo, V. (2); Tagliaferri, G. (2); Sheng, L.Z. (3); Yan, Y.Q. (3); Qiang, P.F. (3); Zhao, B.S. (3)
Author affiliation:(1) IHEP, Institute of High Energy Physics, CAS, 19B Yuquan Road, Beijing; 100049, China; (2) INAF-Brera Astronomical Observatory, Via E. Bianchi 46, Merate; 23807, Italy; (3) XIOPM, Xi’an Institute of Optics and Precision Mechanics, CAS, 17 Xinxi Road, Xi’an; 710119, China
Corresponding author:Song, Z.Y.(songzy@ihep.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12181
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Issue date:2022
Publication year:2022
Article number:121816C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653436
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, United states
Conference code:183051
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The abbreviation "eXTP" represents the enhanced X-ray timing and polarimetry, which is a key science mission initiated by the Chinese scientists, designed to study the state of matter under extreme conditions of density, gravity and magnetism [1]. Various payloads would be on board of the satellite. The SFA, namely the Spectroscopy Focusing Array, consisting of 9 identical X-ray telescopes working in the energy range of 0.5-10 keV, will be the focus here [1]. SFA has a field-of-view of 12 arcmin for each and a collecting area of 900 cm<sup>2</sup> and 550 cm<sup>2</sup> for each at 2 keV and 6 keV respectively [1]. This paper starts with a brief introduction of the general optics, and then goes across some important design aspects. It covers contents from the structural and thermal designs to the CAE analyses as well as the current status. The large diameter and huge focal length of the optics will definitely bring big issues to the robustness of the carrying structure under the severe conditions given by the launcher. According to the current design, the mirror assembly will have 3 feet and 24 spokes. Vibration tests were already performed on a few prototypes by IHEP, and a preliminary evaluation on the feasibility of the design has been achieved. It clearly stated that the current design with only a single spider can probably survive the vibration tests assuming a compromised test condition somewhere. CAE models were adjusted thereafter to match the test results, which could be used for further assessments in a near future. Of course, there are always uncertainties associated with our arguments. More detailed prototypes with mechanically fully representative shells were still under design. Hopefully, highly reliable results could be retrieved soon.<br/></div> © 2022 SPIE. All rights reserved.
Number of references:7
Main heading:Vibration analysis
Controlled terms:Gravitation - Space telescopes - Structural design
Uncontrolled terms:'current - Analyse - Energy ranges - EXTP - Extreme conditions - Science missions - States of matter - Structure design - Vibration test - X ray telescope
Classification code:408.1 Structural Design, General - 741.3 Optical Devices and Systems - 931.5 Gravitation, Relativity and String Theory
Numerical data indexing:Electron volt 2.00E+03eV, Electron volt 5.00E+02eV to 1.00E+04eV, Electron volt 6.00E+03eV, Size 5.50E+00m, Size 9.00E+00m, Size 9.15E-01m
DOI:10.1117/12.2629781
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 380>
Accession number:20224012831194
Title:Fast non-line-of-sight imaging based on product-convolution expansions
Authors:Xu, Weihao (1, 2); Chen, Songmao (1, 3); Tian, Yuyuan (1, 2); Wang, Dingjie (1, 2); Su, Xiuqin (1, 3)
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:18
Issue date:September 15, 2022
Publication year:2022
Pages:4680-4683
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Non-line-of-sight (NLoS) imaging reveals a hidden scene using indirect diffuse reflections. A common choice for analyzing the time-of-flight (ToF) data from a non-confocal system is an ellipsoid model whose operator is high-dimensional, leading to a computationally arduous task. In this Letter, the product-convolution expansions method is utilized to formulate the operator and its adjoint based on the observation of a shift-variant point spread function (PSF) in the ToF data. The operator and its adjoint are locally approximated as a convolution, which allows the forward and backward procedure to be computed efficiently through fast Fourier transform (FFT). Moreover, the low-rank approximation of the operator is obtained by matrix decompositions, further improving the computational efficiency. The proposed method is validated using publicly accessible datasets.<br/></div> © 2022 Optica Publishing Group.
Number of references:20
Main heading:Convolution
Controlled terms:Approximation theory - Computational efficiency - Fast Fourier transforms - Optical transfer function
Uncontrolled terms:Adjoints - Diffuse reflection - Expansion methods - Forward-and-backward - High-dimensional - Higher-dimensional - Low rank approximations - Non-line-of-sight imaging - Shift variant point spread function - Time-of-flight data
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.1364/OL.469719
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:Funding. Strategic High Technology Innovation Project of the Chinese Academy of Sciences (Xiuqin Su); China Postdoctoral Science Foundation (Songmao Chen).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 381>
Accession number:20214211038001
Title:Generalized Scene Classification From Small-Scale Datasets With Multitask Learning
Authors:Zheng, Xiangtao (1); Gong, Tengfei (2, 3); Li, Xiaobin (4); Lu, Xiaoqiang (5)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Beijing Institute of Remote Sensing Information, Beijing; 100192, China; (5) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Key Laboratory of Spectral Imaging Technology CAS, Shaanxi; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:60
Issue date:2022
Publication year:2022
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing images contain a wealth of spatial information. Efficient scene classification is a necessary precedent step for further application. Despite the great practical value, the mainstream methods using deep convolutional neural networks (CNNs) are generally pretrained on other large datasets (such as ImageNet) and thus fail to capture the specific visual characteristics of remote sensing images. For another, it lacks the generalization ability to new tasks when training a new CNN from scratch with an existing remote sensing dataset. This article addresses the dilemma and uses multiple small-scale datasets to learn a generalized model for efficient scene classification. Since the existing datasets are heterogeneous and cannot be directly combined to train a network, a multitask learning network (MTLN) is developed. The MTLN treats each small-scale dataset as an individual task and uses complementary information contained in multiple tasks to improve generalization. Concretely, the MTLN consists of a shared branch for all tasks and multiple task-specific branches with each for one task. The shared branch extracts shared features for all tasks to achieve information sharing among tasks. The task-specific branch distills the shared features into task-specific features toward the optimal estimation of each specific task. By jointly learning shared features and task-specific features, the MTLN maintains both generalization and discrimination abilities. Two types of MTL scenarios are explored to validate the effectiveness of the proposed method: one is to complete multiple scene classification tasks and the other is to jointly perform scene classification and semantic segmentation.<br/></div> 1558-0644 © 2021 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See https://www.ieee.org/publications/rights/index.html for more information.
Number of references:48
Main heading:Semantics
Controlled terms:Learning systems - Remote sensing - Semantic Segmentation - Classification (of information) - Convolution - Large dataset - Computer vision - Convolutional neural networks - Deep neural networks - Semantic Web
Uncontrolled terms:Attention - Convolutional neural network - Features extraction - Multitask learning - Remote sensing images - Remote-sensing - Scene classification - Small scale - Small-scale dataset. - Task analysis
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.5 Computer Applications - 741.2 Vision - 903 Information Science - 903.1 Information Sources and Analysis
DOI:10.1109/TGRS.2021.3116147
Funding details: Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 10.13039/501100014219, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 382>
Accession number:20230413449647
Title:Camera Design and Performance for the Earth 2.0 Mission
Authors:Song, Zongxi (1); Li, Wei (1); Wang, Fengtao (1); Cheng, Pengfei (1); Shen, Chao (1); Pan, Yue (1); Gao, Wei (1); Li, Yan (2); Zhang, Hui (2); Ge, Jian (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) Shanghai Astronomical Observatory, Chinese Academy of Sciences, China
Corresponding author:Gao, Wei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:121804B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and free-floating planets. The six 30 cm diameter transit telescopes will be equipped with a CMOS camera which consists of 4（2×2）9K×9K CMOS sensors. A prototype camera with a 8900×9120 pixel GSENSE 1081 BSI type CMOS sensor and temperature control is designed and developed for high precision photometry measurements. In this paper, details of this camera design and performance test results are reported.<br/></div> © 2022 SPIE.
Number of references:13
Main heading:Earth (planet)
Controlled terms:Cameras - CMOS integrated circuits - Integrated circuit design - Orbits - Photometry - Space telescopes
Uncontrolled terms:Camera design - CMOS - CMOS sensors - High precision photometry - High-precision - Performance - Prototype - Space missions - Terrestrial planets - Transit telescope
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 941.4 Optical Variables Measurements
Numerical data indexing:Size 3.00E-01m, Temperature 9.00E+00K, Time 2.00E+00s
DOI:10.1117/12.2630652
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600. We thank Baopeng Li and Yingdian Li for their help in image acquisition, dataprocessingand analysis.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 383>
Accession number:20222312201903
Title:Structure design of the shutter with slider-crank mechanism (Open Access)
Authors:Jiaqi, F.E.I. (1)
Author affiliation:(1) Laboratory of Aircraft Optical Imaging Monitoring and Measurement Technology, Xi'An Institute of Optics and Precision Mechanics of CAS, China
Corresponding author:Jiaqi, F.E.I.(feijiaqi@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICMIP 2022 - Proceedings of 2022 7th International Conference on Multimedia and Image Processing
Issue date:January 14, 2022
Publication year:2022
Pages:118-123
Language:English
ISBN-13:9781450387408
Document type:Conference article (CA)
Conference name:7th International Conference on Multimedia and Image Processing, ICMIP 2022
Conference date:January 14, 2022 - January 16, 2022
Conference location:Virtual, Online, China
Conference code:179483
Sponsor:Tianjin University of Technology and Education
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">In order to realize the miniaturization and lightweight of the infrared nonuniform correction shutter, the crank slider mechanism is used to design. Firstly, the shutter blade is used as the slider and the driving mechanism is used as the crank, and the motion analysis is carried out. The transmission angle of the crank slider mechanism is calculated to be no less than 66.42 °. Then, the slider, connecting rod and crank are analyzed respectively, the force system and motion equation are established, and the driving torque of the shutter is calculated. The design results show that the volume, weight and driving torque of the same target product are reduced by 1 / 3, 1 / 2 and 1 / 2, respectively, compared with the direct motion rotary shutter commonly used in nonuniform correction of infrared camera. The design goal is achieved.<br/></div> © 2022 Owner/Author.
Number of references:11
Main heading:Infrared imaging
Controlled terms:Equations of motion - Machine design - Mechanisms - Product design
Uncontrolled terms:Crank slider mechanisms - Driving mechanism - Driving torques - IR-imaging - Mechanical shutters - Miniaturisation - Nonuniformity correction - Power calculation - Slider-crank mechanism - Structure design
Classification code:601 Mechanical Design - 601.3 Mechanisms - 746 Imaging Techniques - 913.1 Production Engineering - 921.2 Calculus
DOI:10.1145/3517077.3517119
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 384>
Accession number:20220449283
Title:10-W Random Fiber Laser Based on Er/Yb Co-Doped Fiber
Authors:Li, Zhe (1, 2); Gao, Qi (1, 2); Li, Gang (1, 2); She, Shengfei (1, 2); Sun, Chuandong (1); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi’an Aeronautical University, Xi’an; 710077, China
Corresponding authors:Li, Gang(ligang85@opt.ac.cn); Sun, Chuandong(scd@opt.ac.cn)
Source title:SSRN
Issue date:December 1, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, we presented a 1550 nm, high-power, high-efficiency random fiber laser. A method, utilizing the single-mode erbium-ytterbium co-doped fiber with proper length and the highly reflective fiber Bragg grating with wide reflection bandwidth, is used to surmount the generation of Yb-ASE and low slope efficiency. More than 10 W output power is achieved, with a slope effi-ciency of 36.7% and single transverse mode output. The random fiber laser stably operates without significant amplitude fluctuation under maximum power, and which can provide a high-performance light source for a variety of applications.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:23
Main heading:Fiber lasers
Controlled terms:Efficiency - Fiber Bragg gratings
Uncontrolled terms:1550 nm - 1550 nm wavelength fiber laser - Er/Yb co-doped fiber - Erbium-ytterbium co-doped fibers - High power - Higher efficiency - Laser-based - Random fiber laser - Random fibers - Single mode
Classification code:744.4 Solid State Lasers - 913.1 Production Engineering
Numerical data indexing:Percentage 3.67E+01%, Power 1.00E+01W, Size 1.55E-06m
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4291140
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 385>
Accession number:20230913638894
Title:A Bioinspired Skin UV Filter with Broadband UV Protection, Photostability, and Resistance to Oxidative Damage
Authors:Li, Nini (1, 2); Ji, Xiaohong (1); Mukherjee, Somnath (1); Yang, Bing (1); Ren, Yuqing (1); Wang, Changhao (1); Chen, Yashao (1)
Author affiliation:(1) Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Wang, Changhao(changhaowang@snnu.edu.cn); Chen, Yashao(yschen@snnu.edu.cn)
Source title:ACS Applied Materials and Interfaces
Abbreviated source title:ACS Appl. Mater. Interfaces
Volume:15
Issue:8
Issue date:March 1, 2023
Publication year:2023
Pages:10383-10397
Language:English
ISSN:19448244
E-ISSN:19448252
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, sunscreens’ adverse impacts on the environment and biology have gained wide attention. The improvement of sunscreen safety has become one of the major priorities in skin photoprotection research. It is an effective strategy to develop bionic photoprotective materials by simulating the photoprotective mechanism existing in nature. Inspired by the photoprotective mechanisms of skin and plant leaves, the bionic photoprotective material CS-SA-PDA nanosheet was developed using the free radical grafting method and Michael addition, with natural melanin analogue polydopamine (PDA) nanoparticles and plant sunscreen molecular sinapic acid (SA) as sun protection factors and natural polymer chitosan (CS) as the connecting arm. The results show that CS-SA-PDA can effectively shield UVB and UVA due to the possible synergistic effect between PDA and SA. The introduction of polymer CS significantly improved the photostability of SA and reduced the skin permeability of PDA nanoparticles. The CS-SA-PDA nanosheet can also effectively scavenge photoinduced free radicals. Furthermore, in vivo toxicity and anti-UV evaluations confirm that CS-SA-PDA has no skin irritation and is excellent against skin photodamage, which makes it an ideal skin photoprotective material.<br/></div> © 2023 American Chemical Society.
Number of references:67
Main heading:Nanoparticles
Controlled terms:Addition reactions - Biomimetics - Bionics - Free radicals - Nanosheets - Plants (botany)
Uncontrolled terms:Bioinspired - Oxidative damage - Photo-stability - Polydopamine - Scavenging free radical - Sinapic acids - Skin photoprotective material - UV filter - UV resistance - UV-protection
Classification code:461.1 Biomedical Engineering - 461.8 Biotechnology - 461.9 Biology - 761 Nanotechnology - 802.2 Chemical Reactions - 933 Solid State Physics
DOI:10.1021/acsami.2c19773
Funding details: Number: 21773149,22072080,22222203, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021GY-201, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:We are grateful for the financial support from the National Natural Science Foundation of China (21773149, 22072080, and 22222203) and the Key Research and Development Program of Shaanxi Province (2021GY-201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 386>
Accession number:20223912797421
Title:150 Gbit/s 1 km high-sensitivity FSO communication outfield demonstration based on a soliton microcomb (Open Access)
Authors:Jia, Shuaiwei (1, 2, 3); Xie, Zhuang (1, 2, 3); Shao, Wen (1, 2, 3); Wang, Yang (1, 2, 3); He, Yuanchen (1); Zhang, Dongquan (1); Liao, Peixuan (1, 3); Wang, Weiqiang (1); Gao, Duorui (1, 3); Wang, Wei (1); Xie, Xiaoping (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:20
Issue date:September 26, 2022
Publication year:2022
Pages:35300-35310
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A high-sensitivity and large-capacity free space optical (FSO) communication scheme based on the soliton microcomb (SMC) is proposed. Using ultra-large bandwidth stabilized SMC with a frequency interval of 48.97 GHz as the laser source, 60 optical wavelengths modulated by 2.5 Gbit/s 16-Pulse position modulation (PPM) are transmitted in parallel. A corresponding outfield high-sensitivity 150 Gbit/s FSO communication experiment based on the SMC was carried out with 1 km space distance. Our experimental results show that the best sensitivity of the single comb wavelength which has higher OSNR can reach −52.62 dBm, and the difference is only 1.38 dB from the theoretical limit under the BER of 1 × 10<sup>−3</sup> without forward error correction (FEC). In addition, at BER of 1 × 10<sup>−3</sup>, 16-PPM has a higher received sensitivity of 6.73dB and 3.72dB compared to on-off keying (OOK) and differential phase shift keying (DPSK) respectively. Meanwhile, taking the advantage of multi-channel SMC, 60 × 2.5 Gbit/s can achieve 150 Gbit/s large-capacity free-space transmission. For comparison, commercially available single-wavelength laser based FSO communication system have also been performed in the outfield. The outfield experimental results demonstrated the feasibility of high-sensitivity, large-capacity PPM FSO communication based on SMCs and provided a new perspective for the future development of large-capacity, long-haul FSO communication.<br/></div> © 2022 Optica Publishing Group.
Number of references:49
Main heading:Solitons
Controlled terms:Error correction - Optical communication - Phase shift keying - Pulse position modulation
Uncontrolled terms:Communication schemes - Free Space Optical communication - Frequency intervals - High sensitivity - Laser sources - Microcombs - Optical wavelength - Pulse-position modulation - Space distance - Theoretical limits
Classification code:717.1 Optical Communication Systems
Numerical data indexing:Bit rate 1.50E+11bit/s, Bit rate 2.50E+09bit/s, Decibel 1.38E+00dB, Decibel 3.72E+00dB, Decibel 6.73E+00dB, Decibel milliwatts 5.262E+01dBm, Frequency 4.897E+10Hz, Size 1.00E+03m
DOI:10.1364/OE.465803
Funding details: Number: 61231012,62075238,91638101, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018YFC0307904-02, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (61231012, 62075238, 91638101); National Key Research and Development Program of China (2018YFC0307904-02).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 387>
Accession number:20221511940640
Title:Stability and optical tunability of flexible BST membrane observed in terahertz band
Authors:Xing, Xiaohua (1); Liu, Ming (2); Kang, Kai (3); Ding, Xin (1); Yao, Jianquan (1); Wu, Liang (1)
Author affiliation:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University Key Laboratory of Optoelectronics Information and Technology Ministry of Education, Tianjin University, Tianjin; 300072, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Mechanics Department, School of Mechanical Engineering, Tianjin University, Tianjin; 300072, China
Corresponding author:Wu, Liang(wuliang@tju.edu.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:48
Issue:13
Issue date:July 1, 2022
Publication year:2022
Pages:19006-19010
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Ferroelectric materials are generally inflexible in their normal state, and our synthesized barium strontium titanate (Ba<inf>x</inf>Sr<inf>1-x</inf>TiO<inf>3</inf>, X = 0.6, BST) films are so elastic and flexible that they can be bent at about 140°. The flexibility of the BST film prevents the material from fracturing due to mismatching forces. We demonstrate by THz-TDS (Terahertz time domain spectroscopy) system that the fabricated flexible BST film maintains a stable transmittance under different bending conditions. In addition, under an external optical pump, the transmittance amplitude can be modulated by about 90%. This property can be used in the design of tunable terahertz devices in the case of additional pumps. The film's flexibility and the possibility of further tuning will expand the range of applications for wearable terahertz devices to be developed in the near future.<br/></div> © 2022 Elsevier Ltd and Techna Group S.r.l.
Number of references:41
Main heading:Ferroelectricity
Controlled terms:Barium strontium titanate - Ferroelectric films - Optical pumping - Strontium titanates - Terahertz spectroscopy
Uncontrolled terms:BST film - Ferroelectrics materials - Flexible ferroelectric membrane - Normal state - Optical tunability - Soft modes - Synthesised - Terahertz band - Terahertz device - Time-domain terahertz spectroscopy
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 804 Chemical Products Generally - 931.1 Mechanics
Numerical data indexing:Percentage 9.00E+01%
DOI:10.1016/j.ceramint.2022.03.187
Funding details: Number: 91838301, Acronym: -, Sponsor: -;Number: 2017YFA0700202, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Natural Science Foundation of China Major Research Program Integration Project ( 91838301 ); National Key Research and Development Program of China ( 2017YFA0700202 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 388>
Accession number:20222212185955
Title:Dynamic synopsis and storage algorithm based on infrared surveillance video
Authors:Li, Xuemei (1); Qiu, Shi (2); Song, Yang (3)
Author affiliation:(1) School of Mechanical and Electrical Engineering, Chengdu University of Technology, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) High Technology Research and Development Center of the Ministry of Science and Technology, Beijing, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:124
Issue date:August 2022
Publication year:2022
Article number:104213
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared surveillance video is difficult to watch quickly and store efficiently, a surveillance video synopsis and storage algorithm is proposed based on dynamic. On the basis of extracting moving targets, the constraints of time and space is broken to build an energy functional based on filling density to quickly display the video content on the premise of ensuring the monitoring video information. The Tube structure is formed by the moving target information, and the mapping relationship between the original video and the stored video is established. Image similarity from time and space dimensions is fully utilized to realize the storage of surveillance video. The space ratio between the stored information and the original video is less than 0.2.<br/></div> © 2022 Elsevier B.V.
Number of references:39
Main heading:Infrared imaging
Controlled terms:Monitoring - Security systems
Uncontrolled terms:Energy functionals - Filling density - Infrared surveillances - Moving targets - ON dynamics - Surveillance video - Synopsis - Video - Video contents - Video information
Classification code:746 Imaging Techniques - 914.1 Accidents and Accident Prevention
DOI:10.1016/j.infrared.2022.104213
Funding details: Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;Number: 2021SDCX-121, Acronym: -, Sponsor: Postdoctoral Innovation Project of Shandong Province;
Funding text:This work is supported by Science and Technology Rising Star of Shaanxi Youth (No.2021KJXX-61); The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No.A2206); Postdoctoral Innovation Project of Shandong Province (No. 2021SDCX-121).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 389>
Accession number:20224813171456
Title:Design of Passive Constant-Force End-Effector for Robotic Polishing of Optical Reflective Mirrors (Open Access)
Authors:Zhang, Jian (1, 2); Zhao, Liangxiao (2, 3); Li, Lingling (4); Ma, Fulei (1); Chen, Guimin (4)
Author affiliation:(1) School of Mechano-Electrical Engineering, Xidian University, Xi’an; 710071, China; (2) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Robotics and Intelligent Systems, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Chen, Guimin(guimin.chen@xjtu.edu.cn)
Source title:Chinese Journal of Mechanical Engineering (English Edition)
Abbreviated source title:Chin J Mech Eng Engl Ed
Volume:35
Issue:1
Issue date:December 2022
Publication year:2022
Article number:141
Language:English
ISSN:10009345
E-ISSN:21928258
CODEN:CJMEER
Document type:Journal article (JA)
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">Polishing plays an indispensable role in optical processing, especially for large-aperture optical reflective mirrors with freeform surfaces. Robotic polishing requires effective control of the contact force between the robot and the mirror during processing. In order to maintain a constant contact force during polishing, traditional polishing robots rely on closed-loop control of air cylinders, whose performances heavily rely on high-fidelity force sensing and real-time control. This paper proposes to employ a compliant constant-force mechanism in the end-effector of a polishing robot to passively maintain a constant force between the robot and the mirror, thus eliminating the requirement for force sensing and closed-loop control. The compliant constant force mechanism utilizing the second bending mode of fixed-guided compliant beams is adopted and elaborated for the passive end-effector. An end-effector providing a constant contact force of 40 N is designed and prototyped. The polishing experiment shows that the passive constant-force end-effector provides stable contact force between the robot and the mirror with fluctuation within 3.43 N, and achieves RMS (Root Mean Square) lower than λ/10 (λ = 632.8 nm) of the polished surface of the large-aperture optical reflective mirror. It is concluded that the constant-force compliant mechanism provides a low-cost and reliable solution for force control in robotic polishing.<br/></div> © 2022, The Author(s).
Number of references:25
Main heading:Force control
Controlled terms:Closed loop control systems - Compliant mechanisms - End effectors - Mechanisms - Mirrors - Polishing - Real time control
Uncontrolled terms:Compliant beams - Constant force - Constant-force compliant mechanism - Contact forces - Fixed-guided compliant beam - Optical reflective - Passive force control - Passive forces - Reflective mirrors - Robotic polishing
Classification code:601.3 Mechanisms - 604.2 Machining Operations - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 731.3 Specific Variables Control - 731.5 Robotics - 741.3 Optical Devices and Systems - 931.1 Mechanics - 961 Systems Science
Numerical data indexing:Force 3.43E+00N, Force 4.00E+01N, Size 6.328E-07m
DOI:10.1186/s10033-022-00811-3
Funding details: Number: U1913213, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2016A10, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:Supported by National Natural Science Foundation of China (Grant No. U1913213), West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016A10), and Shanxi Provincial Key Research and Development Projects of China (Grant No. 2018ZDXM-GY-105).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 390>
Accession number:20224913216676
Title:Method of compensating for time measurement error of photomultiplier tube (Open Access)
Title of translation:光电倍增管时间测量误差补偿方法研究 (Open Access)
Authors:Wang, Chong (1); Dang, Wen-Bin (1); Zhu, Bing-Li (2); Yang, Kai (2, 3); Yang, Jia-Hao (1); Han, Jiang-Hao (1)
Author affiliation:(1) School of Electronic Engineering, Xi’an University of Posts & Telecommunications, Xi’an; 710121, China; (2) Key Laboratory of Ultra-Rapid Diagnostic Technology, Xi’an Institute of Optoelectronic Precision Machinery, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Chinese Academy of Sciences University, Beijing; 100049, China
Corresponding author:Dang, Wen-Bin(Dang_wb@163.com)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:22
Issue date:November 20, 2022
Publication year:2022
Article number:222901
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In order to improve the temporal resolution of photomultiplier tubes, our research group has conducted the in-depth research on photomultiplier tubes based on microchannel plates that are widely used at present. The time resolution of photomultiplier tube based on microchannel plate is limited by the transit time of photoelectric signal in each part, including the transit time of photoelectric signal in the transmission process of photocathode to microchannel plate, the transit time of photoelectric signal in microchannel plate time, the transit time of the photoelectric signal from the microchannel plate to the detector anode, and the transit time of the photoelectric signal on the anode to the electrode port. The transit time of the whole process has a certain degree of influence on the time information measurement of the optoelectronic signal. In this study, various parameters affecting the time resolution of the photomultiplier tube are analyzed, and it is found that the different positions of the photoelectron signal on the anode will bring errors to the measurement of the arrival time of the signal at the anode, and the photoelectric signal is transmitted to the electrode port at the affected point of the anode The spent time will cause the signal measurement time to lag behind the real time, which indirectly affects the time resolution of the system. Therefore, a specific study is carried out on the time measurement error of the signal on the anode, and it is determined that the difference of the photoelectron signal on the anode position is an important factor causing the signal time measurement error, and a simple and effective method of compensating for error is proposed. In the research process, the delay line anode is used, and the positional resolution principle of the photoelectric signal is used to obtain the position information of the photoelectron signal on the anode, and the position information is converted into the time information transmitted from the position to the electrode port. The theoretical value of the transit time on the anode is offset, eliminating unnecessary time in the time-of-arrival measurement of the photoelectron signal. The time measurement error of the optoelectronic signal is compensated for by this time information. The experimental results show that the error compensation method can effectively improve the time measurement accuracy of optoelectronic signals, and provide solutions and theoretical basis for improving the time resolution of photomultiplier tubes based on microchannel plates.<br/></div> © 2022 Chinese Physical Society.
Number of references:20
Main heading:Anodes
Controlled terms:Cost functions - Error compensation - Image storage tubes - Measurement errors - Photoelectrons - Photomultipliers - Photons - Time measurement - Tubes (components)
Uncontrolled terms:Delay line anode - Measurements of - Micro channel plate - Photoelectric signals - Photoelectron signals - Photomultiplier tube - Signal-on - Time information - Time-resolution - Transit-time
Classification code:619.1 Pipe, Piping and Pipelines - 711 Electromagnetic Waves - 714.1 Electron Tubes - 921.5 Optimization Techniques - 931.3 Atomic and Molecular Physics - 943.3 Special Purpose Instruments
DOI:10.7498/aps.71.20221193
Funding details: Number: 61805199, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JM-578, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 61805199 ), and the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-578). † Corresponding author. E-mail: Dang_wb@163.com
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 391>
Accession number:20221712008609
Title:Tunable depth of focus with modified complex amplitude modulation of an optical field
Authors:Yin, Weiyu (1, 2); Yang, Yanlong (1); Yang, Ruiwen (1); Yao, Baoli (1, 2, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266200, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:12
Issue date:April 20, 2022
Publication year:2022
Pages:3502-3509
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Bessel beams have nondiffraction and self-healing properties in the propagation direction and are widely used in particle optical manipulation and optical microscopy. Bessel beams can be generated by axicons or spatial light modulators, which can produce a zero-order or high-order Bessel beam with different parameters depending on the specific application. The modulation of Bessel beams achieved in the spatial spectrum domain by optimization algorithms has a low light energy utilization rate due to the small effective modulation region. We propose a Bessel-like beam phase generation algorithm based on an improved iterative optimization algorithm directly in the spatial domain to achieve a tunable modulation of the beam’s length and the axial center position. The optimization time is reduced from minutes to seconds relative to the genetic algorithm, providing a new means of modulation for different applications in various fields.<br/></div> © 2022 Optica Publishing Group
Number of references:19
Main heading:Amplitude modulation
Controlled terms:Bessel functions - Optical signal processing - Genetic algorithms - Laser beams - Light modulation - Energy utilization - Iterative methods - Light modulators
Uncontrolled terms:Axicons - Complex amplitude - Depth-of-focus - Optical field - Optical manipulation - Optical- - Propagation direction - Self-healing properties - Spatial light modulators - Tunables
Classification code:525.3 Energy Utilization - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 921 Mathematics - 921.6 Numerical Methods
DOI:10.1364/AO.453313
Funding details: Number: 12127805, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (12127805).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 392>
Accession number:20230613565944
Title:Rapid full-color Fourier ptychographic microscopy via spatially filtered color transfer
Authors:Chen, Jiurun (1, 2, 3); Wang, Aiye (1, 2, 3); Pan, An (1, 2); Zheng, Guoan (4); Ma, Caiwen (1, 2); Yao, Baoli (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) CAS Key Laboratory of Space Precision Measurement Technology, Xi’an; 710119, China; (4) Department of Biomedical Engineering, University of Connecticut, Storrs; CT; 06269, United States
Corresponding author:Pan, An(panan@opt.cn)
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:10
Issue:10
Issue date:October 1, 2022
Publication year:2022
Pages:2410-2421
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Full-color imaging is of critical importance in digital pathology for analyzing labeled tissue sections. In our previous cover story [Sci. China: Phys., Mech. Astron. 64, 114211 (2021)], a color transfer approach was implemented on Fourier ptychographic microscopy (FPM) for achieving high-throughput full-color whole slide imaging without mechanical scanning. The approach was able to reduce both acquisition and reconstruction time of FPM by three-fold with negligible trade-off on color accuracy. However, the method cannot properly stain samples with two or more dyes due to the lack of spatial constraints in the color transfer process. It also requires a high computation cost in histogram matching of individual patches. Here we report a modified full-color imaging algorithm for FPM, termed color-transfer filtering FPM (CFFPM). In CFFPM, we replace the original histogram matching process with a combination of block processing and trilateral spatial filtering. The former step reduces the search of the solution space for colorization, and the latter introduces spatial constraints that match the low-resolution measurement. We further adopt an iterative process to refine the results. We show that this method can perform accurate and fast color transfer for various specimens, including those with multiple stains. The statistical results of 26 samples show that the average root mean square error is only 1.26% higher than that of the red-green-blue sequential acquisition method. For some cases, CFFPM outperforms the sequential method because of the coherent artifacts introduced by dust particles. The reported CFFPM strategy provides a turnkey solution for digital pathology via computational optical imaging.<br/></div> © 2022 Chinese Laser Press.
Number of references:47
Main heading:Color
Controlled terms:Color image processing - Economic and social effects - Graphic methods - Iterative methods - Mean square error - Pathology
Uncontrolled terms:Color imaging - Color transfers - Digital pathologies - Fourier - Full color - High-throughput - Histogram matching - Mechanical scanning - Spatial constraints - Tissue sections
Classification code:461.6 Medicine and Pharmacology - 741.1 Light/Optics - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 971 Social Sciences
Numerical data indexing:Percentage 1.26E+00%
DOI:10.1364/PRJ.473038
Funding details: Number: 12104500, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (12104500).National Natural Science Foundation of China
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 393>
Accession number:20222512240520
Title:Dielectric property and tunability of multilayer BST-BTO thin film in the terahertz range (Open Access)
Authors:Zhang, Xi (1); Liu, Ming (2); Fu, Yi (1); Kang, Kai (3); Ding, Xin (1); Yao, Jianquan (1); Wang, Zhiyong (3); Wu, Liang (1)
Author affiliation:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin; 300072, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) College of Mechanical Engineering, Tianjin University, Key Laboratory of Modern Engineering Mechanics (Ministry of Education), Tianjin; 300072, China
Corresponding author:Wu, Liang(wuliang@tju.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:155
Issue date:November 2022
Publication year:2022
Article number:108366
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The dielectric property and tunability of Ba<inf>0.6</inf>Sr<inf>0.4</inf>TiO<inf>3</inf> (BST) and BaTiO<inf>3</inf> (BTO) multilayer thin film were investigated by using terahertz time-domain spectroscopy (THz-TDS) at room temperature. The film samples used in the study had a same total thickness but different numbers of periodic layer N (a single BTO layer plus a single BST layer) and different layer thickness ratios x (x for total BTO layer thickness to total film thickness; 1-x for total BST layer thickness to total film thickness). We found that the permittivity of the samples declined with the increase of N, which can also be modulated by external optical pumping. The dielectric loss of the sample with N = 1 was much higher than that of other samples, which could be attributed to the interfacial polarization between BST and BTO thin films. In short, the dielectric property of layered BST-BTO composite structure can be appreciably changed by selecting the number of periodical layers and the corresponding layer thickness. These results indicate that the multilayer thin film structure is possible for the applications of tunable photonic devices in the terahertz range.<br/></div> © 2022 The Authors
Number of references:31
Main heading:Film preparation
Controlled terms:Barium titanate - Dielectric losses - Film thickness - Multilayer films - Multilayers - Optical pumping - Permittivity - Perovskite - Photonic devices - Strontium compounds - Terahertz spectroscopy
Uncontrolled terms:Ba0.6sr0.4TiO3 - BaTiO 3 - Dielectric tunability - Dielectrics property - Layer thickness - Multi-layer thin film - Tera Hertz - Terahertz range - Thin-films - TiO
Classification code:482.2 Minerals - 708.1 Dielectric Materials - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 812.1 Ceramics - 931.1 Mechanics
DOI:10.1016/j.optlastec.2022.108366
Funding details: Number: AFMD-KFJJ-21201, Acronym: -, Sponsor: -;Number: 91838301, Acronym: -, Sponsor: -;Number: 2017YFA0700202, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China Major Research Program Integration Project (91838301), the National Key Research and Development Program of China (2017YFA0700202), and in part by the Fundamental Research Funds of Shaanxi Key Laboratory of Artificially-Structured Materials and Devices (AFMD-KFJJ-21201).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
<RECORD 394>
Accession number:20230113327717
Title:Adaptive Style Modulation for Artistic Style Transfer
Authors:Zhang, Yipeng (1, 2, 3); Hu, Bingliang (1, 2); Huang, Yingying (1, 2, 3); Gao, Chi (1, 2, 3); Wang, Quan (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) The Key laboratory of Biomedical Spectroscopy of Xi’an, Shaanxi, Xi’an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100190, China
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:Neural Processing Letters
Abbreviated source title:Neural Process Letters
Issue date:2022
Publication year:2022
Language:English
ISSN:13704621
E-ISSN:1573773X
CODEN:NPLEFG
Document type:Article in Press
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">Arbitrary-style-per-model (ASPM) style transfer algorithms transfer arbitrary styles based on a single model. Statistics-based learning algorithms of ASPM, represented by adaptive instance normalization (AdaIN), conduct instance normalization and then perform an affine transformation on target features. These algorithms are computationally efficient and easy to embed in convolutional neural networks. Consequently, they are widely used in image synthesis tasks to control the style of the resulting images. However, the style of stylized images may be a combination of content and stylized images, which suggests that these methods do not transform styles accurately. In this work, we rethink the function of AdaIN in controlling style. We show that the role of AdaIN is to (1) give each input content image a specific optimization target, (2) dynamically set cross-channel correlations, and (3) act as a feature selector after combining it with an activation function. Accordingly, we propose adaptive style modulation (AdaSM), which fully leverages the three roles mentioned above and thereby enables more precise control of global style. Experimental results show that AdaSM provides superior style controllability, alleviates the style blending problem, and outperforms state-of-the-art methods in artistic style transfer tasks.<br/></div> © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Number of references:62
Main heading:Deep learning
Controlled terms:Convolutional neural networks - Image processing - Learning algorithms - Transfer learning
Uncontrolled terms:Affine transformations - Artistic style transfer - Deep learning - Images processing - Neural-networks - Normalisation - Single models - Statistic-based - Style transfer - Target feature
Classification code:461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 723.4.2 Machine Learning
DOI:10.1007/s11063-022-11135-7
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key Laboratory of Biomedical Spectroscopy of Xi’an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 395>
Accession number:20223112521814
Title:Scanning dual-microcomb spectroscopy
Authors:Wang, Yang (1, 2); Wang, Zhichuang (1, 2); Wang, Xinyu (1, 2); Shao, Wen (1, 2); Huang, Long (1, 2); Liang, Bo (1, 2); Little, Brent E. (1, 2); Chu, Sai T. (3); Zhao, Wei (1, 2); Wang, Weiqiang (1, 2); Zhang, Wenfu (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Physics and Materials Science, City University of Hong Kong, 999077, Hong Kong
Corresponding authors:Wang, Weiqiang(wwq@opt.ac.cn); Zhang, Wenfu(wfuzhang@opt.ac.cn)
Source title:Science China: Physics, Mechanics and Astronomy
Abbreviated source title:SCI. CHINA Phys. Mech. Astron.
Volume:65
Issue:9
Issue date:September 2022
Publication year:2022
Article number:294211
Language:English
ISSN:16747348
E-ISSN:18691927
Document type:Journal article (JA)
Publisher:Science Press (China)
Abstract:<div data-language="eng" data-ev-field="abstract">Dual-comb spectroscopy (DCS) is a powerful tool in molecular spectroscopy benefiting from the advantages of high resolution and short measurement time. The recently developed soliton microcomb (SMC) can potentially transfer the dual-comb method to an on-chip platform. In this paper, we demonstrate DCS using two frequency scanning SMCs, termed scanning dual-microcomb spectroscopy (SDMCS). The two SMCs are generated by an auxiliary-assisted thermal balance scheme, and the pump laser frequency sweeps over one free spectral range of the microresonator (∼49 GHz) using a feedback control system. The proposed SDMCS has a spectral resolution of 12.5 MHz, which is determined by the minimum sweeping step of the pump laser. Using this SDMCS system, we perform three types of gas molecule absorption spectroscopy recognition and gas concentration detection. This study paves the way for integrated DCS with a high signal-to-noise ratio, high spectral resolution, and fast acquisition rate.<br/></div> © 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:30
Main heading:Solitons
Controlled terms:Absorption spectroscopy - Adaptive control systems - Closed loop systems - Feedback control - Molecular spectroscopy - Pumping (laser) - Resonators - Scanning - Signal to noise ratio - Spectral resolution
Uncontrolled terms:07.07. - 42.60. - 42.65. - 42.82. - 82.80. - Da - Df - Dual-comb spectroscopy - Dx - Gas sensing - Micro resonators - Microcombs - Soliton microcomb - Tg - −m
Classification code:716.1 Information Theory and Signal Processing - 731.1 Control Systems - 741.1 Light/Optics - 744.1 Lasers, General - 961 Systems Science
Numerical data indexing:Frequency 1.25E+07Hz, Frequency 4.90E+10Hz
DOI:10.1007/s11433-022-1920-6
Funding details: Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFB2800600, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key R&D Program of China (Grant No. 2021YFB2800600), and National Natural Science Foundation of China (Grant No. 62075238).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 396>
Accession number:20222812335848
Title:Alignment technology based on a central small aperture for the AIMS telescope
Authors:Shen, Yuliang (1, 2); Kewei, E. (3); Fu, Xing (3); Wang, Dongguang (1); Hou, Junfeng (1, 2); Liang, Ming (4); Xu, Songbo (3)
Author affiliation:(1) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) National Optical-Infrared Astronomy Research Laboratory, Tucson; AZ; 85719, United States
Corresponding author:Wang, Dongguang(wdg@bao.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:19
Issue date:July 1, 2022
Publication year:2022
Pages:5646-5656
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The accurate infrared solar magnetic field measurement system (AIMS) is a 1 m off-axis Gregorian alt-azimuth solar telescope and will be dedicated to measuring the solar magnetic field in mid-infrared. How to align the large-aperture off-axis system is a significant issue. Sub-aperture stitching with the small-aperture standard flat mirror can be applied to the alignment of the large-aperture off-axis system. However, this method is time-consuming and inefficient. We propose an alignment method based on the Zernike polynomials of the central small aperture to solve the low efficiency of sub-aperture stitching. Theoretical simulation shows that the RMS residual error of the system after using the central small-aperture alignment method will be less than 4.5 ∗ 10<sup>−6</sup>λ at 632.8 nm. Practical alignment suggests that our method can make the RMS value of full-aperture wave aberration quickly converge to 0.12λ at 632.8 nm. Compared with the sub-aperture stitching method, our method can significantly reduce the times of sub-aperture stitching and save the alignment time.<br/></div> © 2022 Optica Publishing Group
Number of references:11
Main heading:Alignment
Controlled terms:Magnetic field measurement - Magnetic fields - Telescopes
Uncontrolled terms:Alignment methods - Field measurement systems - Gregorian - Large aperture - Magnetic fields measurements - Off-axis - Small aperture - Solar magnetic fields - Sub-aperture stitching - Technology-based
Classification code:601.1 Mechanical Devices - 701.2 Magnetism: Basic Concepts and Phenomena - 942.4 Magnetic Variables Measurements
Numerical data indexing:Size 1.00E00m, Size 6.328E-07m
DOI:10.1364/AO.459464
Funding details: Number: 11403047,11427803,11427901,11773040, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA15010800,XDA15320102, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022057,XIOPM-CAS E15151Z1, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:Funding. National Natural Science Foundation of China (11403047, 11427803, 11427901, 11773040); The Strategic Pioneer Program on Space Science, Chinese Academy of Sciences (XDA15010800, XDA15320102); Youth Innovation Promotion Association (CAS NO.2022057, XIOPM-CAS E15151Z1).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 397>
Accession number:20224713139256
Title:Ship Detection in Remote Sensing Image Based on Dense RFB and LSTM (Open Access)
Title of translation:Dense RFB 和 LSTM 遥感图像舰船目标检测 (Open Access)
Authors:Zhang, Tao (1); Yang, XiaoGang (1); Lu, XiaoQiang (2); Lu, RuiTao (1); Zhang, ShengXiu (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 80142, China; (2) Rocket Force University of Engineer, Xi’an; 91034, China
Source title:National Remote Sensing Bulletin
Abbreviated source title:National Remote Sensing Bulletin
Volume:26
Issue:9
Issue date:September 2022
Publication year:2022
Pages:1859-1871
Language:Chinese
ISSN:10074619
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Deep learning method had get great progress in remote sensing ship target detection, however there are still two main shortcomings as follows. One is that remote sensing image targets have multi-scale and multidirectional characteristics, especially for ship targets which are arbitrarily densely arranged, while existing detection networks lack of interactions between high-level and low-level features and ignore the context semantic information, which leads to poor detection results. The other is that the background of remote sensing images is complex and easily affected by factors such as light and clouds, resulting in the imbalance of positive and negative samples for target detection. In order to solve the problems above, a multi-scale ship target detection algorithm based on Dense RFB and LSTM is proposed in this paper. Firstly, a Dense RFB feature enhance module (Dense RFB-FE) is designed, which adopts feature multiplexing and expanded convolution to simulate the human eye point of view mechanism to increase the feature experience without increasing the amount of calculation, enhancing the ability to extract feature of shallow network details. Secondly, a deep multi-scale feature pyramid fusion module (MFPF) is designed, drawing on the ideas of FPN and LSTM, using deconvolution and residual structure to fuse deep multi-scale features, filtering invalid feature information, effectively to extract deep semantic information and enhance the expressive ability of the network feature layer. Finally, a new loss function is designed, the focus classification loss function is added to effectively solve the problem of imbalance of positive and negative sample, improving the accuracy of ship target detection. Experiments on optical remote sensing image dataset show that the average detection accuracy of the proposed algorithm for ship targets reaches 81.98%, and the detection speed reaches 29.6fps, which reduces the false detection rate and missed detection rate of target detection to a certain extent. In addition, for ship targets that are blurred, occluded, and partially cropped, the detection effect of the algorithm in this paper is also better than that of the original classic algorithm, which shows that by fusing the semantic information of the feature layer and the detailed positioning information, the generalization ability and characterization of the feature can be improved, which improves the accuracy of ship target detection in remote sensing images. In the future, the algorithm will be further optimized for the problems of multi-scale and dense arrangement of ship targets in remote sensing images. The rotating boxes will be used to accurately position the ship to reduce the interference of complex backgrounds. At the same time, the remote sensing image ship target datasets will be expanded to improve the ship target detection capability of the optical remote sensing image.<br/></div> © 2022 National Remote Sensing Bulletin. All rights reserved.
Number of references:29
Main heading:Optical remote sensing
Controlled terms:Convolution - Deep learning - Feature extraction - Image enhancement - Information filtering - Learning systems - Network layers - Semantics - Ships
Uncontrolled terms:Dense RFB - Feature pyramid - Feature pyramid network - LSTM - Multi-scale features - Pyramid network - Remote sensing images - Ship target detection - Ship targets - Targets detection
Classification code:461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 903.1 Information Sources and Analysis
Numerical data indexing:Percentage 8.198E+01%
DOI:10.11834/jrs.20211042
Funding details: Number: 61806209, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 201851U8012, Acronym: -, Sponsor: Aeronautical Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Supported by National Natural Science Foundation of China (No. 61806209); the Aero Science Foundation of China (No. 201851U8012); Natural Science Basic Research Program of Shaanxi（Program No.2021JQ-373）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 398>
Accession number:20220511570287
Title:Cross-Connected Bidirectional Pyramid Network for Infrared Small-Dim Target Detection
Authors:Bai, Yuanning (1); Li, Ruimin (2); Gou, Shuiping (1); Zhang, Chenchen (3); Chen, Yaohong (4); Zheng, Zhihui (5)
Author affiliation:(1) Key Laboratory of Intelligent Perception and Image Understanding, Ministry of Education, Xidian University, Xi'an, China; (2) Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, China; (3) School of Maritime Economics and Management, Dalian Maritime University, Dalian, China; (4) Chinese Academy of Sciences (CAS), Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (5) Beijing Aerospace Automatic Control Institute, Beijing, China
Corresponding authors:Gou, Shuiping(shpgou@mail.xidian.edu.cn); Li, Ruimin(rmli@xidian.edu.cn)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:19
Issue date:2022
Publication year:2022
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared small-dim target detection is an important technology in the fields of infrared guidance, anti-missile, and tracking system. Due to the small size of targets, no obvious structure information, and low image signal-to-noise ratio (SNR), infrared small-dim target detection is still a challenging task. In this letter, a cross-connected bidirectional pyramid network (CBP-Net) is proposed for infrared small-dim target detection. The main body of the CBP-Net is to embed a bottom-up pyramid in the feature pyramid network (FPN), which is designed to provide more comprehensive target information by connecting with the original multi-scale features and the top-down pyramid. The bottom-up pyramid together with the top-down pyramid forms the proposed bidirectional pyramid structure. Then, an region of interest (ROI) feature augment module (RFA) composed of deformable ROI pooling and position attention is designed to fuse multi-scale ROI features and enhance the spatial information of the small-dim target. Besides, a regular constraint loss (RCL) is introduced to restrict multi-scale feature fusion to learn more precise target location information. Experimental results on two challenging datasets show that the performance of the proposed CBP-Net is superior to the state-of-the-art methods.<br/></div> © 2004-2012 IEEE.
Number of references:22
Main heading:Signal to noise ratio
Controlled terms:Image segmentation
Uncontrolled terms:Bottom up - Constraint loss - Crossconnected bidirectional pyramid network - Dim target detection - Infrared small-dim target detection - Multi-scale features - Pyramid network - Regular constraint loss - ROI feature augment - Small dim targets
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/LGRS.2022.3145577
Funding details: Number: 61801345,61806154,62102296, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JC2102, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61801345, Grant 61806154, and Grant 62102296 and in part by the Fundamental Research Funds for the Central Universities under Grant JC2102.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 399>
Accession number:20220121467
Title:Influence of the Rotary Ultrasonic Vibrating Direction on Surface Quality in Aspheric Grinding Glass-Ceramics
Authors:Sun, Guoyan (1, 2); Shi, Feng (1); Zhang, Bowen (3); Zhao, Qingliang (3); Zhang, Wanli (1); Wang, Yongjie (2); Tian, Ye (1)
Author affiliation:(1) College of Artificial Intelligence, National University of Defense Technology, NO.109 Deya Road, Changsha; 410003, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Center for Precision Engineering School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China
Corresponding author:Shi, Feng(shifeng@nudt.edu.cn)
Source title:SSRN
Issue date:May 26, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">Glass-ceramics are considered superior materials for aspherical optics in large-aperture telescopes and space mirrors due to their outstanding mechanical and thermal performance. To improve the processing quality and efficiency of glass-ceramics, ultrasonic vibration assisted grinding (UVG) is widely studied, focusing on machining mechanism and surface generation. However, the machining characteristics of aspheric surface are rarely studied. Herein, rotary ultrasonic vibration assisted vertical grinding (RUVG), where the vibration direction of grinding wheel is parallel to the rotation liner velocity direction of the workpiece, and rotary ultrasonic vibration assisted parallel grinding (RUPG), where the vibration direction of grinding wheel is vertical to the rotation liner velocity direction of workpiece, are proposed for aspheric surface machining of glass-ceramics. To reveal the surface formation mechanism of both UVG methods theoretically, single-grain kinematic functions are created and contact characteristics between the grinding wheel and aspheric surface are analyzed, as well as the grinding marks corresponding to RUVG and RUPG are simulated. It is worth noting that different ultrasonic vibration (UV) directions lead to significant differences in cutting contact time, contact area, instantaneous relative velocity value and velocity direction between the aspheric surface and grinding wheel. Subsequently, comparative experiments are conducted on an ellipsoid surface of glass-ceramics and the results indicate that there are slight distinctions in macro-grinding surface texture pattern and surface roughness between RUVG and RUPG. From the surface form accuracy viewpoint, RUVG exhibits a more prominent influence than the RUPG, rendering a low surface profile error. The differences in grinding surface quality of RUVG and RUPG mainly depend on grinding parameters, UV parameters and material properties. The current research enables an in-depth understanding of comprehensive mechanisms of RUG for aspheric surface machining of brittle materials and provides theoretical bases for the application of UVG methods on the machining of complex surfaces.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:25
Main heading:Ultrasonic effects
Controlled terms:Aspherics - Glass ceramics - Grinding (machining) - Grinding wheels - Surface properties - Surface roughness - Textures - Ultrasonic waves - Velocity - Vibrations (mechanical)
Uncontrolled terms:Aspheric surfaces - Glass-ceramics - Grinding methods - Grinding surfaces - Parallel grinding - Rotary ultrasonic vibration - Surface machining - Ultrasonic vibration assisted grinding - Velocity directions - Workpiece
Classification code:604.2 Machining Operations - 741.1 Light/Optics - 753.1 Ultrasonic Waves - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4119791
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 400>
Accession number:20224913212821
Title:Surface plasmon-enhanced photodetection of monolayers MoS<inf>2</inf>on an ion beam modified functional substrate
Authors:Lu, Shijia (1); Chen, Jiamin (1); Yang, Fan (1, 2); Han, Huangpu (3); Li, Xiangyang (4); Chen, Linlin (1); Wu, Yuhao (1); He, Bin (1); Chai, Guangyue (1); Ruan, Shuangchen (1); Xiang, Bingxi (1)
Author affiliation:(1) College of New Materials and New Energies, Shenzhen Technology University, Shenzhen; 518118, China; (2) School of Sciences, Xi'An Technological University, Xi'an; 710021, China; (3) School of Intelligent Manufacturing, Zibo Vocational Institute, Zibo; 255314, China; (4) Key Laboratory of Advanced Optical Precision Manufacturing Technology, Guangdong Higher Education Institutes, College of Applied Technology, Shenzhen University, Shenzhen; 518060, China
Corresponding author:Xiang, Bingxi(xiangbingxi@sztu.edu.cn)
Source title:Journal of Applied Physics
Abbreviated source title:J Appl Phys
Volume:132
Issue:18
Issue date:November 14, 2022
Publication year:2022
Article number:183102
Language:English
ISSN:00218979
E-ISSN:10897550
CODEN:JAPIAU
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Monolayer molybdenum disulfide (1L-MoS2) is considered a potential optoelectronic device material due to its ultrathin and direct bandgap properties. However, the absorption of incident light by 1L-MoS2 has shown to be relatively low and is not sufficient to implement high photoelectric conversion efficiency, limiting its practical applications in photodetectors. Due to the local surface plasmon resonance effect, the integration of plasma nanoparticles (NPs) with 2D materials may provide a promising method for enhancing light-matter interactions. Nevertheless, MoS2 may undergo fold deformation when transferred to the plasma structure when prepared via conventional strategies, resulting in the introduction of larger defects. In this work, we reported on a photodetector with enhanced MoS2 photoresponsivity on a flat plasmon functional substrate, in which the Ag NPs were embedded into fused silica (SiO2) by ion implantation. Using MoS2/Ag NPs:SiO2 architecture, the photocurrent of the MoS2-based photodetector was significantly improved under incident light of 375, 532, and 635 nm, with a maximum increase of 72.8 times, while the response time also decreased to a certain extent. Furthermore, the plasma functional substrate had the advantages of environmental stability and repeatable recycling, allowing it to be easily integrated with different 2D materials. Thus, this work offered a viable path for realizing efficient photodetectors based on 2D material.<br/></div> © 2022 Author(s).
Number of references:40
Main heading:Layered semiconductors
Controlled terms:Fused silica - Incident light - Molybdenum disulfide - Monolayers - Photodetectors - Photons - Surface plasmon resonance
Uncontrolled terms:Bandgap properties - Device materials - Incident light - Local surface plasmon resonances - Optoelectronics devices - Photo detection - Photo-electric conversion efficiency - Surface plasmon resonance effects - Surface-plasmon - Ultra-thin
Classification code:712.1 Semiconducting Materials - 741.1 Light/Optics - 804.2 Inorganic Compounds - 812.3 Glass - 931.3 Atomic and Molecular Physics
Numerical data indexing:Size 6.35E-07m, Volume 1.00E-03m3
DOI:10.1063/5.0118004
Funding details: Number: JCYJ20190813103207106, Acronym: -, Sponsor: -;Number: SZWD2021015, Acronym: -, Sponsor: -;Number: 2020KTSCX125, Acronym: -, Sponsor: -;Number: 2020GCZX005, Acronym: -, Sponsor: -;Number: 12105190,61935014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (Nos. 12105190 and 61935014), Shenzhen Science and Technology Planning (No. JCYJ20190813103207106), the University Engineering Research Center of Crystal Growth and Applications of Guangdong Province (No. 2020GCZX005), Special Innovative Projects of Guangdong Province (No. 2020KTSCX125), and Shenzhen Stable Supporting Program (No. SZWD2021015).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 401>
Accession number:20214811226221
Title:Dwarfism computer-aided diagnosis algorithm based on multimodal pyradiomics
Authors:Qiu, Shi (1); Jin, Yi (2, 3); Feng, Songhe (2, 3); Zhou, Tao (4); Li, Yidong (2, 3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) The Beijing Key Laboratory of Traffic Data Analysis and Mining, Beijing, China; (3) The School of Computer and Information Technology Beijing Jiaotong University, Beijing, China; (4) School of Computer Science and Engineering, North Minzu University, Yinchuan; Ningxia, China
Corresponding author:Jin, Yi(yjin@bjtu.edu.cn)
Source title:Information Fusion
Abbreviated source title:Inf. Fusion
Volume:80
Issue date:April 2022
Publication year:2022
Pages:137-145
Language:English
ISSN:15662535
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Dwarfism refers to the phenomenon that children with same gender and age are lower than two standard deviations of normal height in the same living environment. It is of great significance for early diagnosis and early treatment of dwarfism. Dwarfism can be divided into growth hormone deficiency (GHD) and idiopathic short stature (ISS). GHD can be distinguished by growth hormone, while ISS is difficult to distinguish because its hormone features are not obvious. Thus, a computer-aided diagnosis model based on brain image data and clinical features is established for the first time and a dwarfism prediction algorithm is proposed based on multimodal pyradiomics. Firstly, we establish the extraction of pituitary gland based on tensor and binary wavelet model, as the pituitary gland is an important organ that affects the growth hormone. Then, the multi-dimensional fusion model is established to distinguish dwarfism. In the process of distinguishment, the pyradiomics features and clinical features are extracted to distinguish together. Finally, dwarfism computer-aided diagnosis algorithm based on multimodal pyradiomics is realized.<br/></div> © 2021
Number of references:53
Main heading:Computer aided diagnosis
Controlled terms:Learning algorithms - Brain computer interface - Brain - Brain mapping
Uncontrolled terms:Child - Clinical features - Diagnosis algorithms - Dwarfism - Growth hormone deficiency - Growth hormones - Multi-modal - Pituitary gland - Pyradiomic - Standard deviation
Classification code:461.1 Biomedical Engineering - 722.2 Computer Peripheral Equipment - 723.4.2 Machine Learning - 723.5 Computer Applications - 746 Imaging Techniques
DOI:10.1016/j.inffus.2021.11.012
Funding details: Number: 2020BEB04022,2020KYQD08,A2026, Acronym: -, Sponsor: -;Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 1561040,62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M682144, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018AAA0100302, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work is supported by National Key R&D Program of China under Grant No. 2018AAA0100302 , Postdoctoral Science Foundation of China under Grant No. 2020M682144 . Science and Technology Rising Star of Shaanxi Youth under Grant No. 2021KJXX-61 . The Natural Science Foundation of China under Grant No. 1561040 and 62062003 . Ningxia Key Research and Development Project under Grant No. 2020BEB04022 . North Minzu University Research Project of Talent Introduction under Grant No. 2020KYQD08 . The Open Project Program of the State Key Lab of CAD and CG under Grant No. A2026 .
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 402>
Accession number:20223712731448
Title:Polarization-Dependent Scattering of Nanogratings in Femtosecond Laser Photowritten Waveguides in Fused Silica (Open Access)
Authors:Cheng, Guanghua (1); Lin, Ling (2); Mishchik, Konstantin (3); Stoian, Razvan (3)
Author affiliation:(1) School of Artificial Intelligence, Optics and Electronics(iOPEN), Northwestern Polytechnical University, Xi’an; 710072, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Université Jean Monnet, Saint Etienne; 42000, France
Corresponding author:Cheng, Guanghua(guanghuacheng@nwpu.edu.cn)
Source title:Materials
Abbreviated source title:Mater.
Volume:15
Issue:16
Issue date:August 2022
Publication year:2022
Article number:5698
Language:English
E-ISSN:19961944
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The properties of polarization-selective, light-guiding systems upon subwavelength nanogratings formation in the case of type II refractive index traces induced by femtosecond laser pulses in bulk fused silica were studied. Polarization-dependent scattering is analyzed both in simulation using a finite-difference, time-domain method and in experiments. We argue that the polarization-sensitive optical guiding of type II waveguides is due to polarization-dependent scattering of nanogratings. Optical designs can then be suggested where the guiding efficiency of type I traces can be combined with type II anisotropies. A low-loss waveguide polarizer is demonstrated based on the modulation of the evanescent field emerging from type I waveguides using polarization-dependent scattering of neighboring nanogratings.<br/></div> © 2022 by the authors.
Number of references:23
Main heading:Polarization
Controlled terms:Evanescent fields - Femtosecond lasers - Fused silica - Laser pulses - Refractive index - Time domain analysis - Waveguides
Uncontrolled terms:Dependent scatterings - Femtosecond phenomenon - Guiding systems - Light-guiding - Nanograting - Polarization sensitive - Polarization-selective devices - Property - Sub-wavelength - Type II
Classification code:701 Electricity and Magnetism - 714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass - 921 Mathematics
DOI:10.3390/ma15165698
Funding details: Number: KQ111501114, Acronym: -, Sponsor: -;Number: ANR 2011 BS09 026 01, Acronym: ANR, Sponsor: Agence Nationale de la Recherche;
Funding text:This research was funded by State Key Laboratory Foundation of AVIC Manufacturing Technology Institute, [ant number KQ111501114] and the Agence Nationale de la Recherche, France, [rant number ANR 2011 BS09 026 01].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 403>
Accession number:20223012397908
Title:Research on Valuation Level Analysis and Prediction Method of Listed Enterprises Based on Market Sales Ratio
Authors:Wen, Xingjian (1); Chen, Yaxuan (2); Yang, Kai (3); Wang, Fan (3, 4, 5); Li, Xijie (6)
Author affiliation:(1) Guangzhou Foreign Language School, Guangzhou, China; (2) School of Computer Science, Wuhan Donghu University, Wuhan, China; (3) Sanya Science and Education Innovation Park of Wuhan University of Technology, Sanya, China; (4) Wuhan University of Technology, Wuhan, China; (5) Wuhan University of Technology Chongqing Research Institute, Chongqing, China; (6) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Chen, Yaxuan(haohui202101@163.com)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICECC 2022 - Proceedings of the 5th International Conference on Electronics, Communications and Control Engineering
Issue date:March 25, 2022
Publication year:2022
Pages:16-21
Language:English
ISBN-13:9781450395847
Document type:Conference article (CA)
Conference name:5th International Conference on Electronics, Communications and Control Engineering, ICECC 2022
Conference date:March 25, 2022 - March 27, 2022
Conference location:Virtual, Online, Japan
Conference code:180813
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Enterprise valuation is the evaluation of an enterprise's value, which is the focus of research in the financial field. In recent years, with the establishment of China's science and innovation board stock market, enterprise valuation has once again become a hot research topic. Accurate enterprise valuation model has important economic significance for enterprise listing and securities investment. However, the existing valuation methods mainly evaluate the enterprise value through the accounting of some economic indicators. The index information designed in this kind of method is difficult to obtain and is not suitable for investors. How to use the fundamental data and liquidity index data of enterprises to accurately predict the market sales rate plays an important role. Firstly, through the multiple linear regression model, this paper analyzes the prediction of market sales rate, analyzes and summarizes the problems existing in the multiple linear regression model. Secondly, through nonlinear transformation and time series index, an effective market sales rate prediction model is established. Finally, through the prediction and analysis of listed enterprises in China's A-share market, the goodness of the model is successfully improved, which fully verifies the effectiveness of our proposed method.<br/></div> © 2022 ACM.
Number of references:13
Main heading:Multiple linear regression
Controlled terms:Commerce - Forecasting - Investments - Sales
Uncontrolled terms:Analysis method - Enterprise values - Focus of researches - Market sales - Market-sale ratio - Multiple linear regression models - Multiple linear regressions - Prediction methods - Science and innovation - Valuation level analyse
Classification code:922.2 Mathematical Statistics
DOI:10.1145/3531028.3531031
Funding details: Number: 2020KF0059, Acronym: WUT, Sponsor: Wuhan University of Technology;
Funding text:This work was supported in part by Sanya Science and Education Innovation Park of Wuhan University of Technology (2020KF0059). We thank MindSpore for the partial support of this work, which is a new deep learning computing framework(https://www.mindspore. cn/).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 404>
Accession number:20223812778771
Title:Encoding and decoding communications based on perfect vector optical vortex arrays
Authors:Long, Zixu (1, 2); Hu, Huajie (1); Ma, Xin (1, 2); Tai, Yuping (3); Li, Xinzhong (1, 2)
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang; 471023, China
Corresponding author:Li, Xinzhong(xzli@haust.edu.cn)
Source title:Journal of Physics D: Applied Physics
Abbreviated source title:J Phys D
Volume:55
Issue:43
Issue date:October 27, 2022
Publication year:2022
Article number:435105
Language:English
ISSN:00223727
E-ISSN:13616463
CODEN:JPAPBE
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">We proposed the perfect vector optical vortex arrays (PVOVAs) for encoding and decoding communications, including the 2 × 2, 1 × 4, 4 × 4, and 2 × 4 array forms, which were generated with the coaxial superposition of two vector optical vortex arrays with left- and right-handed circular polarization. The polarization order and state of each vector element could be modulated independently by adjusting the corresponding topological charges and additional phases, θ<inf>n</inf> . By attaching code information to these vector elements with different states of polarization, the hexadecimal code elements, including 0 to F, were represented. Therefore, PVOVAs consisting of multiple vector elements can transmit encoding information and be decoded as original information in the receiving end. The school badge grayscale image, with a size of 64 × 64 pixels, was transmitted using the encoding and decoding communication via PVOVAs, and the received restored image had a reliable accuracy. This study proves PVOVAs have flexible spatial structure and controllable states of polarization, and it expands the application of vector optical fields in optical encoding and decoding communication.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:42
Main heading:Vectors
Controlled terms:Decoding - Encoding (symbols) - Optical communication - Polarization - Signal encoding - Vortex flow
Uncontrolled terms:Coaxial superposition - Encoding and decoding - Optical encoding - Optical encoding and decoding communication - Optical field - Optical vortex array - Optical vortices - States of polarizations - Vector optical field - Vortex arrays
Classification code:631.1 Fluid Flow, General - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 723.2 Data Processing and Image Processing - 921.1 Algebra
DOI:10.1088/1361-6463/ac8d13
Funding details: Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201901, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:This work is supported by the National Natural Science Foundation of China (No. 11974102), Key Scientific Research Projects of Institutions of Higher Learning of Henan Province Education Department (No. 21zx002), and State Key Laboratory of Transient Optics and Photonics (No. SKLST201901).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 405>
Accession number:20222812338848
Title:Dual-modality quantitative phase-contrast microscopy based on pupil phase modulation (DQPCM)
Authors:Ma, Ying (1, 2); Ma, Lin (1); Liu, Min (1); Zheng, Juanjuan (1); An, Sha (1); Li, Jianlang (1); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (2) Department of Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:522
Issue date:November 1, 2022
Publication year:2022
Article number:128685
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Phase-contrast optical microscopy that converts phase modulation of transparent samples into intensity modulation plays an indispensable role in biomedical research. In this study, we propose a dual-modality quantitative phase contrast microscopic (DQPCM) platform that integrates quantitative differential interference phase-contrast microscopy (qDIC-PCM) and quantitative Zernike phase-contrast microscopy (qZ-PCM) in the same microscopy. Both imaging modalities are realized through spatial light modulator (SLM) based pupil phase modulation, and switching between the two imaging modes is performed by rotating two polarizers. Both imaging modalities have the merits of high stability and low coherent noise due to their common path interference structure and partially coherent illumination. The experimental results indicate that qDIC-PCM is superior to qZ-PCM in quantitative phase imaging of samples with certain scattering, while qZ-PCM has higher spatial resolution than qDIC-PCM. The proposed technique will be very helpful for imaging the dynamic processes of biological samples with high spatiotemporal resolution.<br/></div> © 2022 Elsevier B.V.
Number of references:39
Main heading:Phase modulation
Controlled terms:Light modulators
Uncontrolled terms:Biological dynamics - Differential interference - Dual-modality - High spatiotemporal resolution - Interference phase contrast microscopies - Label free - Phase-contrast microscopy - Quantitative phase contrasts - Quantitative phase imaging - Spatio-temporal resolution
DOI:10.1016/j.optcom.2022.128685
Funding details: Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-184, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2022YFE0100700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QTZX22039,XJS210503,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2020A1515110590, Acronym: -, Sponsor: Basic and Applied Basic Research Foundation of Guangdong Province;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC 62105251 , 62075177 , 12104354 ); the Natural Science Foundation of Shaanxi Province, China ( 2021JQ-184 ), the Fundamental Research Funds for the Central Universities, China ( XJS210503 , XJS210504 , and QTZX22039 ), Key Research and Development Program of China ( 2022YFE0100700 ), and Guangdong Basic and Applied Basic Research Foundation, China ( 2020A1515110590 ).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 406>
Accession number:20230313384959
Title:Refinement method for compressive hyperspectral data cubes based on self-fusion
Authors:Zhu, Mengjun (1); Yi, Wenjun (1); Dong, Zhaohua (2); Xiong, Peng (2); Du, Junyi (2); Tang, Xingjia (3); Yang, Ying (3); Li, Libo (3); Qi, Junli (1); Liu, Ju (4); Li, Xiujian (1)
Author affiliation:(1) College of Liberal Arts and Sciences, National University of Defense Technology, deyaroad109, Changsha; 410073, China; (2) School of Computer Science and Technology, Xidian University, Xi’an; 710071, China; (3) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) Hunan Institute of Traffic Engineering, Hengyang; 421099, China
Corresponding author:Yi, Wenjun(yiwenjun@nudt.edu.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:39
Issue:12
Issue date:December 1, 2022
Publication year:2022
Pages:2282-2290
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Compressive hyperspectral images often suffer from various noises and artifacts, which severely degrade the imaging quality and limit subsequent applications. In this paper, we present a refinement method for compressive hyperspectral data cubes based on self-fusion of the raw data cubes, which can effectively reduce various noises and improve the spatial and spectral details of the data cubes. To verify the universality, flexibility, and extensibility of the self-fusion refinement (SFR) method, a series of specific simulations and practical experiments were conducted, and SFR processing was performed through different fusion algorithms. The visual and quantitative assessments of the results demonstrate that, in terms of noise reduction and spatial–spectral detail restoration, the SFR method generally is much better than other typical denoising methods for hyperspectral data cubes. The results also indicate that the denoising effects of SFR greatly depend on the fusion algorithm used, and SFR implemented by joint bilateral filtering (JBF) performs better than SRF by guided filtering (GF) or a Markov random field (MRF). The proposed SFR method can significantly improve the quality of a compressive hyperspectral data cube in terms of noise reduction, artifact removal, and spatial and spectral detail improvement, which will further benefit subsequent hyperspectral applications.<br/></div> © 2022 Optica Publishing Group.
Number of references:50
Main heading:Markov processes
Controlled terms:Geometry - Hyperspectral imaging - Magnetorheological fluids - Noise abatement
Uncontrolled terms:Data cube - De-noising - Denoising methods - Fusion algorithms - HyperSpectral - Hyperspectral Data - Imaging quality - Quantitative assessments - Refinement methods - Visual assessments
Classification code:708.4 Magnetic Materials - 746 Imaging Techniques - 751.4 Acoustic Noise - 921 Mathematics - 922.1 Probability Theory
DOI:10.1364/JOSAA.465165
Funding details: Number: 11704411,62005207,62005317, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JJ40341,2021JJ40695, Acronym: -, Sponsor: Natural Science Foundation of Hunan Province;Number: 2020YFA0713504, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (11704411, 62005207, 62005317); Natural Science Foundation of Hunan Province (2019JJ40341, 2021JJ40695); National Key Research and Development Program of China (NKRDPC 2020YFA0713504).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 407>
Accession number:20222212182743
Title:Large-field structured illumination microscopy based on 2D grating and a spatial light modulator
Authors:Wen, Kai (1, 2); Fang, Xiang (1); Ma, Ying (1); Liu, Min (1); An, Sha (1); Zheng, JuanJuan (1, 3); Kozacki, Tomasz (2); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi’an; 710071, China; (2) Department of Mechatronics, Institute of Micromechanics and Photonics, Warsaw University of Technology, Warsaw; 02-525, Poland; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:11
Issue date:June 1, 2022
Publication year:2022
Pages:2666-2669
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Structured illumination microscopy (SIM) has been widely used in biological research due to its merits of fast imaging speed, minimal invasiveness, super-resolution, and optical sectioning imaging capability. However, the conventional SIM that uses a spatial light modulator (SLM) for fringe projection often has a limited imaging field of view. Herein, we report a large-field SIM technique that combines a 2D grating for fringe pattern projection and an SLM for selecting fringe orientation and performing phase shifting digitally. The proposed SIM technique breaks the bottleneck of fringe number limited by the digital projection devices, while maintaining the advantage of high-speed (digital) phase shifting of conventional SIM. The method avoids the pixilation and dispersion effects of the SLMs. Finally, a 1.8-fold resolution enhancement in a large field of 690 × 517 µm<sup>2</sup> under a 20×/NA0.75 objective is experimentally demonstrated. The proposed technique can be widely applied to biology, chemistry, and industry.<br/></div> © 2022 Optica Publishing Group
Number of references:16
Main heading:Light modulators
Controlled terms:Digital devices - Interferometry - Light modulation
Uncontrolled terms:2D grating - Biological research - Fast imaging - Imaging speed - Invasiveness - Larger fields - Microscopy technique - Spatial light modulators - Structured illumination - Superresolution
Classification code:741.1 Light/Optics - 941.4 Optical Variables Measurements
DOI:10.1364/OL.460292
Funding details: Number: 12104354,2021-2022,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021YFF0700303, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2021YFF0700303); National Natural Science Foundation of China (12104354, 62075177, 62105251); Exchange Program Between China and Poland(2021-2022); China Scholarship Council; Open Research Fund of State Key Laboratory of Transient Optics and Photonics.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 408>
Accession number:20220123002
Title:The complex Maxwell stress tensor theorem: The imaginary stress tensor and the reactive strength of orbital momentum. A novel scenery underlying optical forces
Authors:Nieto-Vesperinas, Manuel (1); Xu, Xiaohao (2, 3)
Author affiliation:(1) Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, Madrid; 28049, Spain; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China
Corresponding author:Nieto-Vesperinas, Manuel(mnieto@icmm.csic.es)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:May 18, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">We uncover the existence of a universal phenomenon concerning the electromagnetic optical force exerted by light or other electromagnetic waves on a distribution of charges and currents in general, and of particles in particular. This conveys the appearence of underlying reactive quantities that hinder radiation pressure and currently observed time-averaged forces. This constitutes a novel paradigm of the mechanical efficiency of light on matter, and completes the landscape of the optical, and generally electromagnetic, force in photonics and classical electrodynamics; widening our understanding in the design of both illumination and particles in optical manipulation without the need of increasing the illuminating power, and thus lowering dissipation and heating. We show that this may be accomplished through the minimization of what we establish as the reactive strength of orbital (or canonical) momentum, which plays against the optical force a role analogous to that of the reactive power versus the radiation efficiency of an antenna. This long time overlooked quantity, important for current progress of optical manipulation, and that stems from the complex Maxwell theorem of conservation of complex momentum that we put forward, as well as its alternating flow associated to the imaginary part of the complex Maxwell stress tensor, conform the imaginary Lorentz force that we introduce in this work, and that like the reactive strength of orbital momentum, is antagonistic to the well-known time-averaged force; thus making this reactive Lorentz force indirectly observable near wavelengths at which the time-averaged force is lowered.<br/></div> © 2022, CC BY.
Number of references:77
Main heading:Stress tensor
Controlled terms:Antennas - Efficiency - Electromagnetic waves - Lorentz force - Momentum
Uncontrolled terms:'current - Appearence - Electromagnetics - Maxwell stress tensors - Optical force - Optical manipulation - Orbital momentum - Radiation pressure - Time-averaged
Classification code:701 Electricity and Magnetism - 711 Electromagnetic Waves - 913.1 Production Engineering - 921.1 Algebra - 931.1 Mechanics
DOI:10.48550/arXiv.2205.08984
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2205.08984v2
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 409>
Accession number:20222912369517
Title:Diagnosing temporomandibular joint disorders using second harmonic imaging of collagen fibers
Authors:Wang, Yang (1); Zhang, Jing-Ying (2); Xu, Ying (3); Chui, Hsiang-Chen (3); Han, Jiajia (4); Li, Rui (1)
Author affiliation:(1) Department of Physics, Dalian University of Technology, Liaoning, Dalian, China; (2) Key Laboratory of 3D Printing Technology in Stomatology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Guangdong, Dongguan, China; (3) School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Liaoning, Dalian, China; (4) Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Xi'an Jiaotong University, Shanxi, Xi'an, China
Corresponding author:Li, Rui(rli@dlut.edu.cn)
Source title:Journal of Biophotonics
Abbreviated source title:J. Biophotonics
Volume:15
Issue:10
Issue date:October 2022
Publication year:2022
Article number:e202200075
Language:English
ISSN:1864063X
E-ISSN:18640648
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">This proposed optical imaging method is a nondestructive, real-time and high-resolution approach to distinguish healthy and injured temporomandibular joint (TMJ) tissues. And the TMJ health index was invented. TMJ pathologies are commonly and reported frequently. It could be associated with the damage of collagen, cartilage and bone tissue. The second harmonic generation images could be obtained by a femtosecond laser pulses, so the aligned information of the collagen fibers in all directions for the TMJ disorders was collected. The disorder degree of collagen fibers was quantified and ranked using a fast Fourier transform (FFT) method. The TMJ health index can effectively present the TMJ healthy condition and the disorder degree of collagen fibers, a valuable objective tool for tissue characterization for TMJ healthy condition. Integrated with the staining methods, we can provide the scaling information at different injury degree.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:39
Main heading:Harmonic generation
Controlled terms:Collagen - Fast Fourier transforms - Fibers - Harmonic analysis - Joints (anatomy) - Laser pulses - Nonlinear optics - Tissue
Uncontrolled terms:Clinic diagnose - Collagen fibres - Condition - Disorder degree - Health indices - Non destructive - Optical imaging method - Second-harmonic imaging - Temporomandibular joint - Temporomandibular joint disorders
Classification code:461.2 Biological Materials and Tissue Engineering - 461.3 Biomechanics, Bionics and Biomimetics - 741.1.1 Nonlinear Optics - 744.1 Lasers, General - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.1002/jbio.202200075
Funding details: Number: 2020B1515120001, Acronym: -, Sponsor: -;Number: 4SG21019G, Acronym: -, Sponsor: -;Number: 2020ZDZX2013, Acronym: -, Sponsor: -;Number: 51803018,51972039, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: DUT19LK19,DUT20YG132, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: XLYC1902122, Acronym: -, Sponsor: Liaoning Revitalization Talents Program;
Funding text:The Fundamental Research Funds for the Central Universities of China, Grant/Award Numbers: DUT19LK19, DUT20YG132; Liaoning Revitalization Talents Program, Grant/Award Number: XLYC1902122; National Natural Science Foundation of China, Grant/Award Numbers: 51972039, 51803018; The study was supported by the Special funds for key areas of ordinary universities in Guangdong Province, Grant/Award Number: 2020ZDZX2013; Basic and Applied Basic Research Major Program of Guangdon Province, Grant/Award Number: 2020B1515120001; Discipline construction project of Guangdong Medical University, Grant/Award Numbers: 4SG21015G, 4SG21019G Funding informationThis work was financially supported by the National Natural Science Foundation of China (Nos. 51972039, 51803018), the Liao Ning Revitalization Talents Program (No. XLYC1902122) and the Fundamental Research Funds for the Central Universities of China (Grant No. DUT19LK19 and DUT20YG132). The study was supported by the Special funds for key areas of ordinary universities in Guangdong Province (2020ZDZX2013), the Basic and Applied Basic Research Major Program of Guangdon Province (2020B1515120001), and Discipline construction project of Guangdong Medical University (4SG21015G, 4SG21019G).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 410>
Accession number:20221812043222
Title:Reflectional quantitative phase-contrast microscopy (RQPCM) with annular epi-illumination
Authors:Ma, Ying (1, 2); Wang, Yang (1); Ma, Lin (1); Zheng, Juanjuan (1); Liu, Min (1); Gao, Peng (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (2) Precision Machinery & Precision Instrumentation, University of Science and Technology of China, Hefei; 230026, China
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:13
Issue date:May 1, 2022
Publication year:2022
Pages:3641-3647
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Quantitative phase microscopy (QPM) is a label-free microscopic technique that exploits the phase of a wave passing through a sample; hence, it has been applied to many fields, including biomedical research and industrial inspection.However, the high spatiotemporal resolution imaging of reflective samples still challenges conventional transmissionQPM.In this paper,we propose reflectional quantitative phase-contrast microscopy based on annular epi-illumination of light-emitting diodes. The unscattered wave from the sample is successively phase-retarded by 0, π/2, π, and 3π/2 through a spatial light modulator, and high-resolution phase-contrast images are obtained, revealing the finer structure or three-dimensional tomography of reflective samples. With this system, we have quantitatively obtained the contour of tissue slices and silicon semiconductor wafers.We believe that the proposed system will be very helpful for the high-resolution imaging of industrial devices and biomedical dynamics.<br/></div> © 2022 Optica Publishing Group.
Number of references:40
Main heading:Light modulators
Controlled terms:Industrial research - Silicon wafers
Uncontrolled terms:Biomedical research - Epi-illumination - Industrial inspections - Label free - Microscopic techniques - Phase-contrast microscopy - Quantitative phase contrasts - Quantitative phase microscopies - Resolution imaging - Spatio-temporal resolution
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 901.3 Engineering Research - 912.1 Industrial Engineering
DOI:10.1364/AO.451761
Funding details: Number: 2020A1515110590, Acronym: -, Sponsor: -;Number: 12104354,62075177,62105251, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-184, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2021YFF0700300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: JC2112,XJS210503,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Natural Science Foundation of China (62105251, 62075177, 12104354); National Key Research and Development Program of China (2021YFF0700300); Natural Science Foundation of Shaanxi Province (2021JQ-184); Fundamental Research Funds for the Central Universities (JC2112, XJS210503, XJS210504); Basic and Applied Basic Research Foundation of Guangdong Province (2020A1515110590).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 411>
Accession number:20224513074550
Title:Broadband Fiber Chirped-pulse Amplification System Based on Parabolic Evolution
Title of translation:基于抛物线演化的宽光谱光纤啁啾脉冲放大系统
Authors:Du, Li (1); Jin, Cuihong (1); Yang, Zhi (2); Cui, Yudong (1, 3)
Author affiliation:(1) State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou; 310027, China; (2) Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an; 710119, China; (3) Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China
Corresponding author:Cui, Yudong(cuiyd@zju.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1114002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Fiber lasers have attracted substantial research interest due to their high stability， excellent beam quality and system compactness. Furthermore， lasers generating high-energy ultrafast pulses and operating at the 1 550 nm region are widely developed due to the low optical attenuation at the first communication window and more cost-effective than other laser sources in a variety of applications such as ultrafast spectroscopy， precision material processing and terahertz-wave generation. To achieve high-energy pulses， an Erbium-doped fiber amplifier was employed to amplify seed pulses. However， pulses will accumulate large nonlinear effects such as Self-Phase Modulation （SPM） and Stimulated Raman Scattering （SRS） during direct amplification， thus degrading the pulse quality. One common solution is to widen the pulse width by introducing a chirp before amplification. The peak power intensity is significantly attenuated， avoiding excessive nonlinearity. The amplified pulse is then de-chirped by a compressor. This method is called chirped pulse amplification （CPA）. Several high-power CPA systems operating at 1.56 μm have been demonstrated in recent years. However， all of these sources produced a pulse with spectral width between 5 nm and 15 nm. Broadband fiber laser plays an important role in optical frequency combs， optical coherent tomography， optical coherence radar and fiber optical sensing systems. There is a lack of high-energy devices capable of generating pulses with spectral width above 30 nm. Several approaches have been utilized to generate broadband pulses. A noise-like mode-locked fiber laser was demonstrated based on the precise adjustment of intracavity dispersion. However， this laser regime was seldom applied in ultrashort pulses due to its incompressibility. A Mamyshev oscillator is able to generate broadband pulses as shorter than 100 fs at the expense of complicated intracavity structure and accurate pulse evolution. The extra-cavity generation method relies on Highly Nonlinear Fibers （HNLFs）， such as photonic crystal fibers， whose complexity of design is increased by demanding careful selection of parameters for the seed pulse. In addition， the nonlinear effect induced by SPM generates a nonlinear chirp on both sides of pulses which degrades the beam quality in CPA systems. Note that self-similar pulses are nonlinear optical structures whose amplitudes and widths could be altered by dispersion， nonlinearity， gain and other system parameters， while maintaining the overall shapes. Since the self-similar pulse has a strict linear frequency chirp induced by the balance between SPM and normal group velocity dispersion in the erbium-doped fiber， it could be effectively compressed by grating pairs to obtain a high-power ultrashort pulse. Therefore， the combination of self-similar amplification and CPA is a promising solution to generating broadband watt-level pulse. High-energy ultrafast pulses based on parabolic evolution in ytterbium-doped lasers have been reported. Nevertheless， the Erbium-Doped Fiber Amplifier （EDFA） based on self-similar amplification operates at an anomalous dispersion region， which is less applicable to generating pulses with the average power above watt-level high-energy pulses comparing to Ytterbium-Doped Fiber Amplifier （YDFA）. At the same time， high-energy CPA systems operating at 1 550 nm significantly lag behind Yb-doped lasers due to high quantum defect， thermal effects and nonlinearity. At present， there is no report on a broadband high-energy CPA system based on parabolic evolution operating at 1 550 nm. Here， we demonstrated an all-fiber Er-doped chirped-pulse amplification laser， which generates Watt-level broadband pulse with the application of self-similar amplification. Numerical simulations of the model laser were performed by following the propagation of the pulses and considering every action of cavity components on the pulses. We use the results of one round-trip circulation as the input of the next round of calculation until the optical field becomes self-consistent. For this context， pulse propagation equation is given by the nonlinear Schrodinger equation. The parameters of each element of the laser are optimized according to theoretical simulations. In our experiment， the seed source is a dispersion-managed passively mode-locked fiber laser with a Gaussian-spectral profile， which evolves into a parabolic shape after self-similar amplification， achieving a broadband pulse bandwidth with the full-width at a half-maximum of 44.8 nm under 400 mW pump power. The spectral width and energy of the pulse increase rapidly during amplification. The pulses are stretched in Dispersion Compensating Fiber （DCF） to reduce peak power， avoiding excessive nonlinearity. Then a Double-Clad Er/Yb co-Doped Fiber （DC-EYDF） is used as the main amplifier. The spectral width of the pulse is narrowed down to 30 nm with the effect of gain filtering during amplification. The pulse is amplified to 1.3 W with the pump power of 9 W. The amplifier delivers 32 nJ pulses at a repetition rate of 40.1 MHz， which can be compressed down to 587 fs through a pair of transmission gratings. We believe that the narrower pulses could be achieved by switching to fiber Bragg gratings to adjust the dispersion between the stretchers and compressors precisely. The robust， broadband， and watt-level 1 550 nm fiber laser source can be used for nonlinear frequency conversion， solar cell micromachining and ophthalmology due to its compact size.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:25
Main heading:Ultrashort pulses
Controlled terms:Amplification - Chirp modulation - Cost effectiveness - Dispersion (waves) - Erbium doped fiber amplifiers - Fiber lasers - Nonlinear optics - Photonic crystal fibers - Self phase modulation - Structure (composition) - Terahertz waves - Ytterbium
Uncontrolled terms:Broad spectrum - Broadband pulse - Chirped-pulse-amplification - Energy - Erbium- doped fibers - Erbium-ytterbium co-doped fibers - Parabolics - Self-similar amplifications - Spectral widths - Watt levels
Classification code:547.2 Rare Earth Metals - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television - 741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.4 Solid State Lasers - 744.7 Laser Components - 911.2 Industrial Economics - 951 Materials Science
Numerical data indexing:Energy 3.20E-08J, Frequency 4.01E+07Hz, Power 1.30E+00W, Power 4.00E-01W, Power 9.00E+00W, Size 1.56E-06m, Size 3.00E-08m, Size 4.48E-08m, Size 5.00E-09m to 1.50E-08m, Size 5.50E-07m, Time 1.00E-13s, Time 5.87E-13s
DOI:10.3788/gzxb20225111.1114002
Funding details: Number: -, Acronym: ZJNSF, Sponsor: Natural Science Foundation of Zhejiang Province;Number: 2020WNLOKF008, Acronym: WNLO, Sponsor: Wuhan National Laboratory for Optoelectronics;
Funding text:Natural Science Foundation of Zhejiang Province （No.LGG20F050002）， Open Project Program of Wuhan National Laboratory for Optoelectronics （No. 2020WNLOKF008）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 412>
Accession number:20223712734072
Title:Secondary electron emission of Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms fabricated by atomic layer deposition
Title of translation:基于原子层沉积的氧化铝和氧化镁纳米薄膜二次电子发射特性
Authors:Zhu, Xiangping (1, 2); Wang, Dan (3); Wang, Hui (4, 5); Zhou, Rundong (1, 2); Li, Xiangxin (1); Hong, Yunfan (1); Jin, Chuan (1); Wei, Yonglin (1); Luo, Chaopeng (4, 5); Zhao, Wei (1, 2)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Microelectronics, Xi’an Jiaotong University, Xi’an; 710049, China; (4) Science and Technology on Near-Surface Detection Laboratory, Wuxi; 214035, China; (5) The Fifth Institute of Army Academy, Wuxi; 214035, China
Corresponding authors:Zhu, Xiangping(xpzhu@opt.ac.cn); Zhao, Wei(weiz@opt.ac.cn)
Source title:Kexue Tongbao/Chinese Science Bulletin
Abbreviated source title:Kexue Tongbao/Chin. Sc. Bull.
Volume:67
Issue:23
Issue date:2022
Publication year:2022
Pages:2811-2820
Language:Chinese
ISSN:0023074X
E-ISSN:20959419
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Electron multiplier devices are widely applied in many electronic instruments like mass spectrometers and atomic clocks. It is considerably crucial for a multiplier to possess a high electron gain, and this index can be directly determined by secondary electron yield (SEY) of the dynodes. Al<inf>2</inf>O<inf>3</inf> and MgO possess a relatively high SEY level among majority of dynode materials, and their film products are excellent dynode candidates. Whereas, for some multipliers like microchannel plate (MCP), only an ultrathin film of several nanometers is allowed to be coated onto the inner wall of the micro channels to avoid the variation of the channel diameter. Therefore, SEY characteristics of the ultrathin films are necessary to be figured out. Here, by using the technology of atomic layer deposition, 7 groups of ultrathin Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms with increase thickness (1, 3, 5, 7, 10, 30, and 50 nm) are fabricated on silicon (Si) substrates. As well as, 5 groups of Al<inf>2</inf>O<inf>3</inf> nanofilms (1, 2, 3, 4, and 20 nm) are deposited on MgO film (20 nm) substrate. Surface composition, morphology, film thickness, and SEY have been characterized in detail. Via the experiments, it is found that SEY of the Al<inf>2</inf>O<inf>3</inf>/Si and MgO/Si samples largely depends on the film thickness, namely, SEY increases obviously as the film thickness rises, meanwhile, the increment of SEY decreases gradually. The SEY tendency indicates that the effect of top film on SEY becomes enhanced, and the influence of bottom substrate on SEY becomes weakened. When the film thickness increases beyond 30 nm, SEY increment approaches to 0, and SEY tends to be saturated. This phenomenon demonstrates that the penetration depth of incident electrons is less than the film thickness under the circumstances. To interpret the experimental results, the SEE semi-physical theory developed for double layer structures is utilized. The calculation results indicate that the film thickness has a remarkable impact on SEY, especially when the incident energy becomes lower and the film becomes thicker, the results also reveal that the dielectric surface film possesses a great ability to modulate the surface SEY. However, SEY becomes less dependent on film thickness as the incident energy increases, and it results from the increase of penetration depth for the incident electrons. This work reveals the mechanism of the SEE characteristics for ultrathin Al<inf>2</inf>O<inf>3</inf> and MgO nanofilms, which is of great significance for the subsequent research on the use of nanoscale high SEY dielectric films as the SEE functional layer in electron multipliers.<br/></div> © 2022 Chinese Academy of Sciences. All rights reserved.
Number of references:39
Main heading:Alumina
Controlled terms:Aluminum oxide - Atomic layer deposition - Electrons - Film thickness - Image storage tubes - Magnesia - Morphology - Silicon - Substrates - Ultrathin films
Uncontrolled terms:Atomic-layer deposition - Double layer structure - Film-thickness - Incident electrons - Incident energy - Nano films - Secondary electron emissions - Secondary electron yield - Secondary electrons - Ultra-thin
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.1 Electron Tubes - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1.2 Crystal Growth - 951 Materials Science
Numerical data indexing:Size 2.00E-08m, Size 3.00E-08m, Size 5.00E-08m
DOI:10.1360/TB-2022-0175
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 413>
Accession number:20230813622786
Title:Laser Active Fusion Trajectory Measurement Technology in Rocket Take-off Phase
Title of translation:火 箭 起 飞 段 的 激 光 主 动 融 合 轨 迹 测 量 技 术
Authors:Shi, Heng (1, 2, 3, 4); Gao, Xin (1); Li, Xiyu (1); Lei, Chengqiang (1); Hu, Lei (1); Zong, Yonghong (1); Zheng, Donghao (1); Sun, Rui (1)
Author affiliation:(1) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi′an; 710119, China; (4) Pilot National Laboratory for Marine Science and Technology（Qingdao）, Shangdong, Qingdao; 266237, China
Corresponding author:Gao, Xin(gaoxin526@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:51
Issue:12
Issue date:2022
Publication year:2022
Article number:1212001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The high-precision trajectory data of the rocket vertical take-off phase can be used to evaluate the technical performance and accuracy of the rocket，provide data reference for the improved design and finalization of the rocket，and also provide important trajectory reference data for the rocket take-off safety control system. The trajectory of the rocket in the vertical take-off phase changes greatly in the vertical rising direction，while the theoretical trajectory in both directions of the horizontal plane does not change. However，in the actual launch process，due to various interferences and certain delays and deviations in the real-time control of the rocket，the actual trajectory of the rocket in the horizontal plane will inevitably have a certain offset. The traditional trajectory measurement methods in the vertical take-off phase of rocket mainly include telemetry，optical and radio radar measurement. Due to the vibration caused by rocket launch，the trajectory measurement accuracy of telemetry system is not high，and it is difficult to obtain effective original analysis data after rocket failure. The optical measurement system uses images taken by multiple stations to obtain the rocket trajectory data after the rendezvous，but it is easily affected by the weather and has poor real-time performance. Due to the interference of ground clutter，it is difficult for radio radar to obtain effective trajectory data at this stage. It can be seen that there is no real-time trajectory measurement data in the vertical take-off phase of the rocket at present，and it is urgent to fill the data gap in this phase through new measurement methods.A single lidar can be used to measure the rocket trajectory in the take-off phase，but the trajectory data of the rocket in both directions of the horizontal plane in the vertical take-off phase changes very little，and only relying on a single lidar to measure the trajectory in the two directions will cause large errors. Compared with a single lidar measurement system，the field of view of the two multi-line lidars in the vertical direction can reach 25°，and a total of 128 laser scanning lines scan the rocket target area at the same time. In addition，the two lidars conduct fusion measurement at an intersection angle of 70°，which can cover the target area of the rocket with a larger angle range. Therefore，more target measurement points can be scanned，which can not only improve the fitting accuracy of the center of the ellipse ，but also effectively ensure the reliability of the data measurement. In view of the difficult technical problem of obtaining real-time high-precision trajectory data in the rocket vertical takeoff phase，a new rocket take-off phase trajectory fusion measurement system based on lidar is proposed in this paper，which has the advantages of convenient station layout，easy installation and low power consumption. At the same time，it is less affected by weather，ground clutter signals and rocket vibration，and can effectively obtain the rocket real-time trajectory data. Two lidars are installed on a two-dimensional precision turntable to form a fusion measurement system. Before the launch of the rocket，the two lidars jointly scan the middle and upper target areas of the rocket. Based on the proposed algorithm of laser point cloud data correction，the initial value solution of rocket target area trajectory and data fusion processing of the two trajectory data，the static and dynamic trajectory measurement accuracy of the lidar are calculated and analyzed to be 0.023 5 m and 0.036 6 m respectively. In the process of rocket vertical take-off，the two-dimensional precision turntable receives the trajectory data of the rocket target area in real time，guides the lidar to track and scan the whole process of the rocket vertical take-off phase with high precision according to the rocket position information，and completes the real-time and high-precision trajectory measurement of the rocket vertical take-off phase，which effectively fills the gap of the trajectory measurement data of the rocket at this stage and ensures the safety of rocket launch. Up to now，the rocket real-time trajectory measurement system based on lidar has successfully completed many test tasks in a satellite launch center. Under the conditions of vibration，tail flame and other environmental interference in the rocket take-off phase，the real-time dynamic trajectory measurement accuracy can be better than 0.05 m. It is verified that the measurement system and method proposed in this paper can effectively improve the measurement accuracy and reliability of rocket trajectory，which has important engineering application value.<br/></div> © 2022 Chinese Optical Society. All rights reserved.
Number of references:18
Main heading:Data handling
Controlled terms:Data fusion - Optical data processing - Optical radar - Radar measurement - Real time control - Rockets - Telemetering equipment - Trajectories - Vibration analysis
Uncontrolled terms:Dynamic measurement accuracy - Fusion data processing - Laser point - Laser point cloud datas - Measurement system - Point-clouds - Take off - Trajectories datum - Trajectory measurements - Vertical take-off
Classification code:654.1 Rockets and Missiles - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 731 Automatic Control Principles and Applications - 741.3 Optical Devices and Systems
Numerical data indexing:Size 5.00E+00m, Size 5.00E-02m, Size 6.00E+00m
DOI:10.3788/gzxb20225112.1212001
Funding details: Number: 2021406, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The Youth Innovation Promotion Association Chinese Academy of Sciences（No. 2021406），Key Laboratory of Space Precision Measurement Technology Chinese Academy of Sciences（No.29J21-063-Ⅲ）
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 414>
Accession number:20223712709636
Title:Simulation of Mesosphere Wind Measurement with Multiple Emission Lines of the O<inf>2</inf>(0-1) Band Using Space-Based Doppler Asymmetric Spatial Heterodyne (Open Access)
Authors:Fu, Di (1, 2); Zhao, Hengxiang (1); Li, Juan (1); Wu, Kuijun (3); Chang, Chenguang (1, 2); Bai, Lu (4); Feng, Yutao (1); Liu, Xuebin (1)
Author affiliation:(1) Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Optic-Electronic Information Science and Technology, Yantai University, Yantai; 264005, China; (4) School of Physics, Xidian University, Xi’an; 710071, China
Corresponding authors:Feng, Yutao(fytciom@opt.ac.cn); Liu, Xuebin(lxb@opt.ac.cn)
Source title:Atmosphere
Abbreviated source title:Atmosphere
Volume:13
Issue:8
Issue date:August 2022
Publication year:2022
Article number:1309
Language:English
E-ISSN:20734433
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">For space-based atmospheric wind measurements, full-link simulation is critical for the optimization of the instrument indicators and the evaluation of the measurements’ performance. This paper presents observation simulations and error verification of the mesosphere wind measurement with four emission lines of the O<inf>2</inf>(0-1) band by using the space-based Doppler Asymmetric Spatial Heterodyne (DASH), named the Mesosphere Wind Image Interferometer (MWII). The passive wind measurement principle and the DASH concept are first described. The full-link simulation consists of radiation simulation, the instrument forward model, and the wind retrieval model. The four emission lines at about 866.5 nm of the O<inf>2</inf>(0-1) band were selected as the observation targets. The radiation characteristics of the target lines were studied and calculated, as well as the background radiation. Based on the LOS radiation integral model, a numerical simulation of the raw observation data was carried out using the instrument model. The interference fringe priority strategy and joint wind decision method were proposed to achieve multiple-emission-line wind retrieval with higher precision. In the simulation, multiple-line retrieval could improve the precision by more than 30% compared to single-line retrieval under the same conditions. The error simulation indicated that the wind profile precision was 3–9 m/s in the altitude range of 50–110 km, with an average accuracy of about 1 m/s, proving that the scheme of MWII has good altitude coverage of the whole mesosphere and a part of the lower thermosphere.<br/></div> © 2022 by the authors.
Number of references:35
Main heading:Errors
Controlled terms:Electromagnetic wave emission - Heterodyning - Ionosphere
Uncontrolled terms:Dopple asymmetric spatial heterodyne - Doppler - Emission lines - Line measurements - Mesosphere - Multiple emission line measurement - Observation simulation - Space-based - Space-based wind measurement - Spatial heterodyne - Wind measurement
Classification code:443.1 Atmospheric Properties - 711 Electromagnetic Waves
Numerical data indexing:Percentage 3.00E+01%, Size 5.00E+04m to 1.10E+05m, Size 8.665E-07m, Velocity 1.00E00m/s, Velocity 3.00E+00m/s to 9.00E+00m/s
DOI:10.3390/atmos13081309
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB 2016A07, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931,E1294301, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research was funded by the National Natural Science Foundation of China (Grant No. 41005019), West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB 2016A07), Natural Science Basic Research Program of Shaanxi Province (Grant No. 2019JQ-931), and the West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (Grant No. E1294301).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 415>
Accession number:20230413449800
Title:Optical Design of the Transit Telescope for The Earth 2.0 Mission
Authors:Zhou, Dan (1); Zhang, Congcong (1); Ge, Jian (1); Zhang, Hui (1); Zhang, Yongshuai (1); Yu, Yong (1); Chen, Yonghe (2); Liu, Xiaohua (2); Song, Zongxi (3); Gao, Wei (3); Zhang, Hongfei (4); Wang, Jian (4)
Author affiliation:(1) Shanghai Astronomical Observatory, Chinese Academy of Sciences, Nandan Road 80, Shanghai; 200030, China; (2) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Yutian Road 500, Shanghai; 200083, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xinxi Road 17, Shaanxi, Xi'an, China; (4) Department of Modern Physics, University of Science and Technology of China, Jinzhai Road 96, Anhui, Hefei, China
Corresponding author:Zhou, Dan(dzhou@shao.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:1218018
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese next-generation space mission aiming at detecting thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth's 2.0s), cold low-mass planets, and free-floating planets. The ET mission will use six 300 mm diameter wide field telescope arrays to continuously monitor 1.2 million FGKM dwarf stars in the original Kepler field and its adjacent regions for four consecutive years to search for new planets including Earth 2.0s using the transit technique. The six telescopes have the same configuration, point to the same sky area, and constitute the main scientific payload. Each telescope has an effective aperture of 300 mm with a very wide field of view (FOV) of 500 square degrees and a wavelength coverage of 450-900 nm. Each telescope is equipped with a focal plane mosaic camera. The mosaic camera is composed of 2×2, 9k×9k CMOS detectors with pixel size of 10µm. The optical design results in the diameter of the 90% encircled energy (EE90%) less than 40µm (or 4 pixels) over the entire FOV. About 20% vignetting at the edge of the FOV is introduced to provide good throughput for the entire FOV while keeping optics size and weight down to reduce manufacturing risk and scientific payload within the mass and volume limit. In this paper, we will present the optical design details, including influence analysis of various factors on image quality, e.g., glass material, detector flatness, manufacturing and assembly tolerances. In addition, we will describe temperature stability analysis of the telescope on image quality and photometry measurements.<br/></div> © 2022 SPIE.
Number of references:3
Main heading:Earth (planet)
Controlled terms:Cameras - Glass - Image analysis - Optical design - Orbits - Pixels - Quality control - Stars - Telescopes
Uncontrolled terms:Earth-like planets - Ee90% - Field of views - Free-floating planets - Low-mass - Scientific payloads - Solar type stars - Space missions - Transit - Wide-field
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 742.2 Photographic Equipment - 812.3 Glass - 913.3 Quality Assurance and Control
Numerical data indexing:Percentage 2.00E+01%, Percentage 9.00E+01%, Size 3.00E-01m, Size 4.50E-07m to 9.00E-07m, Time 2.00E+00s
DOI:10.1117/12.2630673
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 416>
Accession number:20225113279056
Title:Beyond Three-octave OAM Supercontinuum Generation in Dual Concentric Ring-core Fiber with Four ZDWs
Authors:Geng, Wenpu (1); Fang, Yuxi (1); Wang, Yingning (1); Wang, Zhi (1); Liu, Yan-Ge (1); Zhang, Lin (2); Bao, Changjing (3); Ren, Yongxiong (3); Pan, Zhongqi (4); Yue, Yang (5)
Author affiliation:(1) Institute of Modern Optics, Nankai University, Tianjin; 300350, China; (2) School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin; 300072, China; (3) Department of Electrical Engineering, University of Southern California, Los Angeles; CA; 90089, United States; (4) Department of Electrical & Computer Engineering, University of Louisiana at Lafayette, Lafayette; LA; 70504, United States; (5) School of Information and Communications Engineering, Xi'an Jiaotong University, Xi'an; 710049, China
Corresponding author:Yue, Yang(yueyang@xjtu.edu.cn)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022
Issue date:2022
Publication year:2022
Article number:JW3A.18
Language:English
ISBN-13:9781957171166
Document type:Conference article (CA)
Conference name:Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022
Conference date:July 24, 2022 - July 28, 2022
Conference location:Maastricht, Netherlands
Conference code:184701
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We design a dual concentric ring-core fiber with four ZDWs to enable a broadband OAM supercontinuum generation. A 3534-nm supercontinuum forms from 442 to 3976 nm at -40 dB, which covers beyond three-octave bandwidth.<br/></div> © 2022 The Author(s).
Number of references:9
Main heading:Supercontinuum generation
Uncontrolled terms:Concentric rings - Core fibre - Octave bandwidths - Ring-core - Super continuum
Classification code:741.1.1 Nonlinear Optics
Numerical data indexing:Decibel -4.00E+01dB, Size 3.534E-06m, Size 4.42E-07m to 3.976E-06m
Funding details: Number: 2019YFB1803700, Acronym: -, Sponsor: National Key Research and Development Program of China;
Funding text:This work was jointly supported by the National Key Research and Development Program of China (No. 2019YFB1803700), and the Key Technologies Research and Development Program of Tianjin (20YFZCGX00440).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 417>
Accession number:20225113279059
Title:Extremely Dispersive Triple Ring-core Fiber for OAM Mode with Dual Selectable Operating Windows
Authors:Geng, Wenpu (1); Bao, Changjing (2); Zhang, Lin (3); Fang, Yuxi (1); Wang, Yingning (1); Wang, Zhi (1); Liu, Weiwei (1); Ren, Yongxiong (2); Pan, Zhongqi (4); Yue, Yang (5)
Author affiliation:(1) Institute of Modern Optics, Nankai University, Tianjin; 300350, China; (2) Department of Electrical Engineering, University of Southern California, Los Angeles; CA; 90089, United States; (3) School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin; 300072, China; (4) Department of Electrical & Computer Engineering, University of Louisiana at Lafayette, Lafayette; LA; 70504, United States; (5) School of Information and Communications Engineering, Xi'an Jiaotong University, Xi'an; 710049, China
Corresponding author:Yue, Yang(yueyang@xjtu.edu.cn)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022
Issue date:2022
Publication year:2022
Article number:JW3A.23
Language:English
ISBN-13:9781957171166
Document type:Conference article (CA)
Conference name:Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022
Conference date:July 24, 2022 - July 28, 2022
Conference location:Maastricht, Netherlands
Conference code:184701
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Triple ring-core fiber is designed with two selectable extremely dispersive windows. OAM1,1 mode has a negative dispersion down to -129,964 ps/(nm·km) at 1644.4 nm and -270,017 ps/(nm·km) at 1651 nm with different mode launching locations.<br/></div> © 2022 The Author(s).
Number of references:10
Uncontrolled terms:Core fibre - Operating windows - Ring-core
Numerical data indexing:Size 1.6444E-06m, Size 1.651E-06m, Time -1.29964E-07s, Time -2.70017E-07s
Funding details: Number: 2019YFB1803700, Acronym: -, Sponsor: National Key Research and Development Program of China;
Funding text:This work was jointly supported by the National Key Research and Development Program of China (No. 2019YFB1803700), and the Key Technologies Research and Development Program of Tianjin (20YFZCGX00440).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 418>
Accession number:20223412602126
Title:Theoretical Model of Thermal Stress in the Film-Substrate System of Optical Thin Film
Authors:Shi, Yunyun (1, 2); Xu, Junqi (1); Li, Yang (1); Liu, Zheng (2); Zhang, Kaifeng (3); Su, Junhong (1)
Author affiliation:(1) Shaanxi Province Thin Films Technology and Optical Test Open Key Laboratory, Xi’an Technological University, Xi’an; 710021, China; (2) Advanced Optical Manufacturing Technology Joint Laboratory, Xi’an Institute of Optics and Precision Mechanics, Xi’an; 710119, China; (3) Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou; 730000, China
Corresponding author:Li, Yang(liyang01@st.xatu.edu.cn)
Source title:Journal of Electronic Materials
Abbreviated source title:J Electron Mater
Volume:51
Issue:10
Issue date:October 2022
Publication year:2022
Pages:5937-5945
Language:English
ISSN:03615235
E-ISSN:1543186X
CODEN:JECMA5
Document type:Journal article (JA)
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">A model of thermal stress in double-layer optical dielectric films on circular substrates was established based on the theory of double-layer composite beams. Here, considering the boundary conditions including force balance and bending moment balance, the distribution of stress and strain in the double-layer film-substrate system was analyzed following equivalence manipulation to determine a detailed formula for calculating the thermal stress in the equivalent film and substrate. The derived formula was not only effective in analyzing the stress and strain of the double-layer film-substrate system but was also applicable for predicting the distribution of thermal stress in the periodic elastic multilayer film-substrate system. According to the actual radius of curvature of the substrate measured via a profilometer before and after the deposition of the HfO<inf>2</inf>/SiO<inf>2</inf> double-layer films, the obtained residual stress of the film was − 79.33 MPa, whereas the thermal stress of the film was calculated to be −52.59 MPa using the theoretical formula. The calculations of the theoretical model were similar to the experimental results when the smaller intrinsic stresses were neglected and the double-layer film was only of nanometer thickness, thus verifying the effectiveness of the double-layer film-substrate model.<br/></div> © 2022, The Minerals, Metals & Materials Society.
Number of references:17
Main heading:Residual stresses
Controlled terms:Composite films - Compressive stress - Film preparation - Hafnium oxides - Multilayer films - Optical films - Substrates - Thermal stress - Thin films
Uncontrolled terms:Composite beam - Double layers - Double-layer films - Film-substrate systems - Force balances - Layer composites - Optical thin films - Optical- - Stress and strain - Theoretical modeling
Classification code:741.3 Optical Devices and Systems - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids
Numerical data indexing:Pressure 5.259E+07Pa, Pressure 7.933E+07Pa
DOI:10.1007/s11664-022-09819-w
Funding details: Number: 6142207190407, Acronym: -, Sponsor: -;
Funding text:This work was funded by the Key Laboratory for Equipment Pre-research (No.6142207190407), International Science and Technology Cooperation and Exchange Plan Project of Shaanxi Province(Nos.2018KWZ-02).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 419>
Accession number:20224212968254
Title:The complex Maxwell stress tensor theorem: The imaginary stress tensor and the reactive strength of orbital momentum. A novel scenery underlying electromagnetic optical forces (Open Access)
Authors:Nieto-Vesperinas, Manuel (1); Xu, Xiaohao (2, 3)
Author affiliation:(1) Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, Madrid; 28049, Spain; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China
Corresponding authors:Nieto-Vesperinas, Manuel(mnieto@icmm.csic.es); Xu, Xiaohao(xuxhao_dakuren@163.com)
Source title:Light: Science and Applications
Abbreviated source title:Light Sci. Appl.
Volume:11
Issue:1
Issue date:December 2022
Publication year:2022
Article number:297
Language:English
ISSN:20955545
E-ISSN:20477538
Document type:Journal article (JA)
Publisher:Springer Nature
Abstract:<div data-language="eng" data-ev-field="abstract">We uncover the existence of a universal phenomenon concerning the electromagnetic optical force exerted by light or other electromagnetic waves on a distribution of charges and currents in general, and of particles in particular. This conveys the appearence of underlying reactive quantities that hinder radiation pressure and currently observed time-averaged forces. This constitutes a novel paradigm of the mechanical efficiency of light on matter, and completes the landscape of the optical, and generally electromagnetic, force in photonics and classical electrodynamics; widening our understanding in the design of both illumination and particles in optical manipulation without the need of increasing the illuminating power, and thus lowering dissipation and heating. We show that this may be accomplished through the minimization of what we establish as the reactive strength of orbital (or canonical) momentum, which plays against the optical force a role analogous to that of the reactive power versus the radiation efficiency of an antenna. This long time overlooked quantity, important for current progress of optical manipulation, and that stems from the complex Maxwell theorem of conservation of complex momentum that we put forward, as well as its alternating flow associated to the imaginary part of the complex Maxwell stress tensor, conform the imaginary Lorentz force that we introduce in this work, and that like the reactive strength of orbital momentum, is antagonistic to the well-known time-averaged force; thus making this reactive Lorentz force indirectly observable near wavelengths at which the time-averaged force is lowered. The Minkowski and Abraham momenta are also addressed.<br/></div> © 2022, The Author(s).
Number of references:66
Main heading:Stress tensor
Controlled terms:Antennas - Electromagnetic waves - Lorentz force - Momentum - Radiation efficiency
Uncontrolled terms:'current - Appearence - Electromagnetics - Maxwell stress tensors - Optical force - Optical manipulation - Orbital momentum - Radiation pressure - Time-averaged
Classification code:461.2 Biological Materials and Tissue Engineering - 701 Electricity and Magnetism - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television - 921.1 Algebra - 931.1 Mechanics
DOI:10.1038/s41377-022-00979-2
Funding details: Number: 11804119,12274181, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: PGC2018-095777-B-C21, Acronym: MICINN, Sponsor: Ministerio de Ciencia e Innovación;
Funding text:MN-V work was supported by Ministerio de Ciencia e Innovación of Spain, grant PGC2018-095777-B-C21. X.X acknowledges the National Natural Science Foundation of China (12274181, 11804119). A critical reading and interesting comments from Dr. M. W. Puga, as well as important questions from two anonymous reviewers, are gratefully acknowledged.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 420>
Accession number:20223912791132
Title:Mid-infrared broadband optical frequency comb generated in MgF<inf>2</inf> resonators
Authors:Wu, Wei (1, 2); Sun, Qibing (1, 2); Wang, Yi (1, 2); Yang, Yu (3); Ming, Xianshun (1); Shi, Lei (1, 2); Wang, Keyi (3); Zhao, Wei (1, 2); Wang, Leiran (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei; 230026, China
Corresponding author:Sun, Qibing(qbsun@opt.ac.cn)
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:10
Issue:9
Issue date:August 1, 2022
Publication year:2022
Pages:1931-1936
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Microresonator-based optical frequency combs are broadband light sources consisting of equally spaced and coherent narrow lines, which are extremely promising for applications in molecular spectroscopy and sensing in the mid-infrared (MIR) spectral region. There are still great challenges in exploring how to improve materials for microresonator fabrication, extend spectral bandwidth of parametric combs, and realize fully stabilized soliton MIR frequency combs. Here, we present an effective scheme for broadband MIR optical frequency comb generation in a MgF<inf>2</inf> crystalline microresonator pumped by the quantum cascade laser. The spectral evolution dynamics of the MIR Kerr frequency comb is numerically investigated, revealing the formation mechanism of the microresonator soliton comb via scanning the pump-resonance detuning. We also experimentally implement the modulation instability state MIR frequency comb generation in MgF<inf>2</inf> resonators covering from 3380 nm to 7760 nm. This work proceeds microresonator-based comb technology toward a miniaturization MIR spectroscopic device that provides potential opportunities in many fields such as fundamental physics and metrology.<br/></div> © 2022 Chinese Laser Press.
Number of references:38
Main heading:Magnesium compounds
Controlled terms:Infrared devices - Microresonators - Molecular spectroscopy - Natural frequencies - Optical materials - Pumping (laser) - Quantum cascade lasers - Solitons
Uncontrolled terms:Broadband Light Sources - Micro resonators - Mid-infrared frequency combs - Mid-infrared spectral regions - Midinfrared - Narrow lines - Optical frequency comb generation - Optical frequency combs - Optical-frequency combs - Spectral bandwidth
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.7 Laser Components
Numerical data indexing:Size 3.38E-06m to 7.76E-06m
DOI:10.1364/PRJ.459478
Funding details: Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: PKU, Sponsor: Peking University;Number: 2022JC-43, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Acknowledgment. The authors thank Prof. Haitao Guo of Xi’an Institute of Optics and Precision Mechanics of CAS for the support of mid-infrared fibers, Prof. Fengqi Liu of Institute of Semiconductors of CAS for the support of QCLs, and Zhejiang University and Peking University for the support of tapered fiber fabrication.Funding. National Natural Science Foundation of China (61635013); Natural Science Basic Research Program of Shaanxi Province (2022JC-43).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 421>
Accession number:20221011744908
Title:Robust Speckle-Autocorrelation Non-Line-of-Sight Imaging with Generative Adversarial Networks
Authors:Chen, Yue (1, 2); Qu, Bo (1, 2, 3); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Ministry of Education Key Laboratory for Intelligent Networks and Network Security, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Qu, Bo(qubo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12083
Part number:1 of 1
Issue title:Thirteenth International Conference on Graphics and Image Processing, ICGIP 2021
Issue date:2022
Publication year:2022
Article number:120830B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510650428
Document type:Conference article (CA)
Conference name:13th International Conference on Graphics and Image Processing, ICGIP 2021
Conference date:August 18, 2021 - August 20, 2021
Conference location:Kunming, China
Conference code:177277
Sponsor:Chang'an University; et al.; Foshan University; Northwest A and F University; Sichuan University; Xi'an University of Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Non-line-of-sight (NLOS) imaging, which utilizes weak photons that diffusely reflect from the visible surfaces (e.g., diffuse walls), can reconstruct hidden objects around the corner. Recently, lots of non-line-of-sight imaging methods have been proposed, such as time-of-flight (ToF)-based methods, coherence-based methods, and intensity-based methods. However, most of these methods are time-consuming for data acquisition and have poor robustness in the reconstruction process. In this paper, the novel application of Generative Adversarial Network is introduced to NLOS imaging. A robust, real-time NLOS imaging method based on autocorrelation mapping Generative Adversarial Network (AMGAN) is proposed, which reconstructs hidden scenes by learning the autocorrelation mapping from speckle-autocorrelation to the hidden target. In order to train the proposed AMGAN, we also analyze the principles of speckle-autocorrelation NLOS imaging and the noise model of the imaging process. Then a speckle-autocorrelation NLOS imaging dataset SANLOS is synthesized in this paper. Finally, our method is compared with other methods based on deep learning quantitatively and qualitatively. The experimental results demonstrate that the proposed approach achieves better NLOS reconstruction quality and is more robust under different exposure times compared with state-of-art methods.<br/></div> © 2022 SPIE.
Number of references:38
Main heading:Generative adversarial networks
Controlled terms:Data acquisition - Speckle - Autocorrelation - Image processing - Mapping - Convolutional neural networks - Deep learning
Uncontrolled terms:Auto correlation - Coherence-based method - Convolutional neural network - Hidden objects - Imaging method - Intensity-based methods - Non-line-of-sight imaging - Reconstruction process - Speckle-autocorrelation - Time-of flight
Classification code:405.3 Surveying - 461.4 Ergonomics and Human Factors Engineering - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 741.1 Light/Optics - 921 Mathematics
DOI:10.1117/12.2623424
Funding details: Number: 2020ZDLGY04-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work was supported by the Key Research and Development Program of Shaanxi (Program No. 2020ZDLGY04-03).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 422>
Accession number:20224212986017
Title:The route to a 200 MHz, all-PM femtosecond Yb-doped fiber laser with a high output coupling ratio
Authors:Zhang, Zhao (1, 2); Zhang, Tong (1, 2); Lv, Zhiguo (3); Zhang, Ting (1, 2); Cheng, Haihao (1, 2); Hu, Xiaohong (1); Pan, Ran (1); Feng, Ye (1); Wang, Yishan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physical Science and Technology, Inner Mongolia Key Laboratory of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot; 010021, China
Corresponding author:Hu, Xiaohong(xhhu@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:28
Issue date:October 1, 2022
Publication year:2022
Pages:8475-8483
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Based on the time-independent rate equations and nonlinear Schrödinger equation, we simulate a 200 MHz all-polarization-maintaining (PM) mode-locked Yb-doped fiber laser. The cavity round trip evolution toward stable mode locking is present. Additionally, the gain coefficients along the gain fiber as well as the pulses, chirp, and spectra at different locations in the cavity are examined. The effects of chirped fiber Bragg grating parameters on the pulse shape and spectrum profile are also investigated. According to the calculations, we experimentally realize a 200 MHz femtosecond fiber laser with 115 mW output power. The timing jitter and integrated relative intensity noise are measured as 158 fs (1 kHz to 10 MHz) and 0.0513% (1 Hz to 300 kHz), respectively. Eventually, an amplified average power of 610 mW and 79 fs compressed pulses with a peak power of approximately 28 kW are obtained. The exhibited all-PM femtosecond fiber laser system can be adopted as the foundation for an optical frequency comb.<br/></div> © 2022 Optica Publishing Group.
Number of references:34
Main heading:Fiber Bragg gratings
Controlled terms:Fiber lasers - Locks (fasteners) - Nonlinear equations
Uncontrolled terms:Femtosecond fiber lasers - Femtoseconds - High output - Mode-locked - Output coupling ratios - Polarization maintaining - Pulse spectrum - Rate equations - Time independents - Yb-doped fiber lasers
Classification code:744.4 Solid State Lasers
Numerical data indexing:Frequency 1.00E+03Hz to 1.00E+07Hz, Frequency 1.00E00Hz to 3.00E+05Hz, Frequency 2.00E+08Hz, Percentage 5.13E-02%, Power 1.15E-01W, Power 2.80E+04W, Power 6.10E-01W, Time 1.58E-13s, Time 7.90E-14s
DOI:10.1364/AO.472038
Funding details: Number: 1100000865, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:State Key Laboratory of Transient Optics and Photonics (1100000865).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 423>
Accession number:20221712029080
Title:Eagle-Eye-Inspired Attention for Object Detection in Remote Sensing (Open Access)
Authors:Liu, Kang (1, 2); Huang, Ju (1, 2, 3); Li, Xuelong (1, 2)
Author affiliation:(1) School of Artificial Intelligence, OPtics and ElectroNics (iOPEN), Northwestern Polytechnical University, Xi’an; 710072, China; (2) Key Laboratory of Intelligent Interaction and Applications, Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an; 710072, China; (3) Shaanxi Key Laboratory of Ocean Optics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Huang, Ju(huangjuhappy123@126.com)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:7
Issue date:April-1 2022
Publication year:2022
Article number:1743
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Object detection possesses extremely significant applications in the field of optical remote sensing images. A great many works have achieved remarkable results in this task. However, some common problems, such as scale, illumination, and image quality, are still unresolved. Inspired by the mechanism of cascade attention eagle-eye fovea, we propose a new attention mechanism network named the eagle-eye fovea network (EFNet) which contains two foveae for remote sensing object detection. The EFNet consists of two eagle-eye fovea modules: front central fovea (FCF) and rear central fovea (RCF). The FCF is mainly used to learn the candidate object knowledge based on the channel attention and the spatial attention, while the RCF mainly aims to predict the refined objects with two subnetworks without anchors. Three remote sensing object-detection datasets, namely DIOR, HRRSD, and AIBD, are utilized in the comparative experiments. The best results of the proposed EFNet are obtained on the HRRSD with a 0.622 AP score and a 0.907 AP<inf>50</inf> score. The experimental results demonstrate the effectiveness of the proposed EFNet for both multi-category datasets and single category datasets.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:79
Main heading:Object detection
Controlled terms:Object recognition - Knowledge based systems - Optical remote sensing
Uncontrolled terms:Anchor-free - Attention mechanisms - Eagle Eyes - Eagle-eye fovea network - Knowledge based - Learn+ - Objects detection - Optical remote sensing - Remote sensing images - Remote-sensing
Classification code:723.2 Data Processing and Image Processing - 723.4.1 Expert Systems - 741.3 Optical Devices and Systems
DOI:10.3390/rs14071743
Funding details: Number: 2020-JCJQ-ZD-015-00-02,61871470, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018AAA0102201, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding: This work was supported by the National Key Research and Development Program of China under Grant 2018AAA0102201, and the National Natural Science Foundation of China (No. 61871470), and also the Basic Research Strengthening Program of China under Grant 2020-JCJQ-ZD-015-00-02.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 424>
Accession number:20223712712947
Title:An Optimization Algorithm for Optical Gain in the Multi-EDFAs-based Fiber-optic Time Synchronization
Authors:Liu, Bo (1, 2); Kong, Weicheng (3, 4); Guo, Xinxing (3, 4); Li, Bo (3, 4); Zhang, Shougang (3, 4); Dong, Ruifang (3, 4); Liu, Tao (3, 4)
Author affiliation:(1) Chinese Academy of Sciences, National Time Service Center, Xi'an, China; (2) Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an, China; (3) University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China; (4) Chinese Academy of Sciences, Key Laboratory of Time and Frequency Primary Standards, Xi'an, China
Corresponding author:Liu, Bo(313784890@qq.com)
Source title:2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2022 - Proceedings
Abbreviated source title:Jt. Conf. Eur. Frequ. Time Forum IEEE Int. Freq. Control Symp., EFTF/IFCS - Proc.
Part number:1 of 1
Issue title:2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2022 - Proceedings
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665497183
Document type:Conference article (CA)
Conference name:2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2022
Conference date:April 24, 2022 - April 28, 2022
Conference location:Paris, France
Conference code:182056
Sponsor:EFTF; IEEE; IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (UFFC); sfmc
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">This article reports an optimization model of optical fiber time synchronization EDFA gain coefficient based on genetic algorithm (G A). According to a series of parameters such as the distance and attenuation of each section of optical fiber, the EDFA gain coefficient of each node is obtained for the purpose of maximizing the signal-to-noise ratio, SNR. This algorithm is further exploited for regulating the gains of bidirectional amplifiers, allowing optimization of the performance of the link. The developed algorithm was tested experimentally done with 210-and 300-km-long links in the laboratory, incorporating three and four amplifiers. The results suggest that, comparing with the fixed gain coefficient setting, the proposed solutions allow optimizing the SNR by 3-5 dB and reduce the phase jitter by about 20%.<br/></div> © 2022 IEEE.
Number of references:9
Main heading:Signal to noise ratio
Controlled terms:Erbium doped fiber amplifiers - Genetic algorithms - Optical fibers - Synchronization
Uncontrolled terms:Bidirectional amplifiers - Fiber-optics - Fixed gains - Gain coefficients - Optimisations - Optimization algorithms - Optimization models - Performance - Time synchronization
Classification code:716.1 Information Theory and Signal Processing - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744.7 Laser Components - 961 Systems Science
Numerical data indexing:Decibel 3.00E+00dB to 5.00E+00dB, Percentage 2.00E+01%, Size 3.00E+05m
DOI:10.1109/EFTF/IFCS54560.2022.9850958
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 425>
Accession number:20223312570687
Title:Loss modulation assisted solitonic pulse excitation in Kerr resonators with normal group velocity dispersion (Open Access)
Authors:Liu, Mulong (1); Dang, Yaai (1); Huang, Huimin (2); Lu, Zhizhou (3); Wang, Yuanyuan (1); Cai, Yanan (1); Zhao, Wei (4)
Author affiliation:(1) School of Science, Northwest A&F University, Yangling; 712100, China; (2) College of Information Engineering, Northwest A&F University, Yangling; 712100, China; (3) Chongqing United Microelectronics Center (CUMEC), Xiyuan South Street, Chongqing; 401332, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:17
Issue date:August 15, 2022
Publication year:2022
Pages:30176-30186
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate an emergent solitonic pulse generation approach exploiting the externally introduced or intrinsic loss fluctuation effects. Single or multiple pulses are accessible via self-evolution of the system in the red, blue detuning regime or even on resonance with loss perturbation. The potential well caused by the loss profile not only traps the generated pulses, but also helps to suppress the drift regarding high-order dispersion. Breathing dynamics is also observed with high driving force, which can be transferred to stable state by backward tuning the pump detuning. We further investigate the intrinsic free carrier absorption, recognized as unfavored effect traditionally, could be an effective factor for pulse excitation through the time-variant loss fluctuation in normal dispersion microresonators. Pulse excitation dynamics associated with physical parameters are also discussed. These findings could establish a feasible path for stable localized structures and Kerr microcombs generation in potential platforms.<br/></div> © 2022 Optica Publishing Group.
Number of references:60
Main heading:Group velocity dispersion
Controlled terms:Dispersions - Microresonators - Solitons
Uncontrolled terms:Detunings - Group-velocity dispersions - Intrinsic loss - Multiple pulse - Potential wells - Pulse generation - Pulses excitation - Self- evolutions - Single pulse - Solitonic pulse
Classification code:741.1 Light/Optics - 744.7 Laser Components - 951 Materials Science
DOI:10.1364/OE.464145
Funding details: Number: 52002331, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. Natural Science Basic Research Program of Shaanxi Province (No.2020JQ-280, No.2022JQ-066, No.2022JQ-688); National Natural Science Foundation of China (NO.52002331).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 426>
Accession number:20224212986593
Title:On-Chip Temporal Coherence Synthesis for Classical and Quantum Waveform Processing
Authors:Chemnitz, Mario (1); Fischer, Bennet (1); MacLellan, Benjamin (1); Roztocki, Piotr (1); Helsten, Robin (1); Wetel, Benjamin (2); Little, Brent E. (3); Chu, Sai T. (4); Moss, David J. (5); Azaña, Jose (1); Morandotti, Roberto (1)
Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1P7, Canada; (2) XLIM Research Institute, CNRS, UMR 7252, Université de Limoges, Limoges; 87060, France; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave, Shaanxi, Xi'an, China; (4) City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (5) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Source title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Issue date:2022
Publication year:2022
Article number:SF3G.2
Language:English
ISBN-13:9781957171050
Document type:Conference article (CA)
Conference name:2022 Conference on Lasers and Electro-Optics, CLEO 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:182946
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We use a low-loss, user-friendly on-chip interferometer cascade to exploit the concept of temporal coherence synthesis for the shaping of optical pulses and, first-time, of the joint spectral intensity of broadband correlated photon pairs.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:4
Uncontrolled terms:Correlated photon pairs - Low-loss - On chips - Spectral intensity - Temporal coherence - User friendly - Waveform processing
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 427>
Accession number:20223512662554
Title:On-Chip Temporal Coherence Synthesis for Classical and Quantum Waveform Processing
Authors:Chemnitz, Mario (1); Fischer, Bennet (1); MacLellan, Benjamin (1); Roztocki, Piotr (1); Helsten, Robin (1); Wetzel, Benjamin (2); Little, Brent E. (3); Chu, Sai T. (4); Moss, David J. (5); Azaña, José (1); Morandotti, Roberto (1)
Author affiliation:(1) Institut national de la recherche scientifique (INRS-EMT), 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1P7, Canada; (2) XLIM Research Institute, CNRS UMR 7252, Université de Limoges, Limoges; 87060, France; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave., Shaanxi, Xi'an, China; (4) City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (5) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:CLEO: Science and Innovations, S and I 2022
Issue date:2022
Publication year:2022
Article number:SF3G.2
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, S and I 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:181730
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We use a low-loss, user-friendly on-chip interferometer cascade to exploit the concept of temporal coherence synthesis for the shaping of optical pulses and, first-time, of the joint spectral intensity of broadband correlated photon pairs.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:4
Uncontrolled terms:Correlated photon pairs - Low-loss - On chips - Spectral intensity - Temporal coherence - User friendly - Waveform processing
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 428>
Accession number:20223512663028
Title:Scalable, Autonomous On-Chip Picosecond Pulse-Shaping Enabled by Smart Optimization
Authors:Fischer, Bennet (1); Chemnitz, Mario (1); MacLellan, Benjamin (1); Roztocki, Piotr (1); Helsten, Robin (1); Wetzel, Benjamin (2); Little, Brent (3); Chu, Sai (4); Moss, David (5); Azaña, José (1); Morandotti, Roberto (1)
Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1P7, Canada; (2) XLIM Research Institute, CNRS UMR 7252, Université de Limoges, Limoges; 87060, France; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave, Shaanxi, Xi'an, China; (4) City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (5) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:CLEO: Science and Innovations, S and I 2022
Issue date:2022
Publication year:2022
Article number:STh2E.5
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, S and I 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:181730
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a scalable, autonomous on-chip pulse shaping system based on temporal coherence synthesis. The inclusion of smart optimization algorithms enables robust, and reconfigurable pulse-shaping over a wide range of input and target durations.<br/></div> © Optica Publishing Group 2022, © 2021 The Author(s)
Number of references:9
Uncontrolled terms:Chip pulse - On chips - Optimisations - Optimization algorithms - Picosecond pulse - Pulse-shaping - Reconfigurable - Temporal coherence
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 429>
Accession number:20223812750843
Title:Deep Pansharpening via 3D Spectral Super-Resolution Network and Discrepancy-Based Gradient Transfer (Open Access)
Authors:Su, Haonan (1); Jin, Haiyan (1); Sun, Ce (2, 3)
Author affiliation:(1) Shaanxi Key Laboratory for Network Computing and Security Technology, Department of Computer Science and Engineering, Xi’an University of Technology, No. 5 South Jinhua Road, Xi’an; 710048, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Su, Haonan(suhaonan@xaut.edu.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:17
Issue date:September 2022
Publication year:2022
Article number:4250
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">High-resolution (HR) multispectral (MS) images contain sharper detail and structure compared to the ground truth high-resolution hyperspectral (HS) images. In this paper, we propose a novel supervised learning method, which considers pansharpening as the spectral super-resolution of high-resolution multispectral images and generates high-resolution hyperspectral images. The proposed method learns the spectral mapping between high-resolution multispectral images and the ground truth high-resolution hyperspectral images. To consider the spectral correlation between bands, we build a three-dimensional (3D) convolution neural network (CNN). The network consists of three parts using an encoder–decoder framework: spatial/spectral feature extraction from high-resolution multispectral images/low-resolution (LR) hyperspectral images, feature transform, and image reconstruction to generate the results. In the image reconstruction network, we design the spatial–spectral fusion (SSF) blocks to reuse the extracted spatial and spectral features in the reconstructed feature layer. Then, we develop the discrepancy-based deep hybrid gradient (DDHG) losses with the spatial–spectral gradient (SSG) loss and deep gradient transfer (DGT) loss. The spatial–spectral gradient loss and deep gradient transfer loss are developed to preserve the spatial and spectral gradients from the ground truth high-resolution hyperspectral images and high-resolution multispectral images. To overcome the spectral and spatial discrepancy between two images, we design a spectral downsampling (SD) network and a gradient consistency estimation (GCE) network for hybrid gradient losses. In the experiments, it is seen that the proposed method outperforms the state-of-the-art methods in the subjective and objective experiments in terms of the structure and spectral preservation of high-resolution hyperspectral images.<br/></div> © 2022 by the authors.
Number of references:36
Main heading:Image reconstruction
Controlled terms:Convolution - Convolutional neural networks - Learning systems - Optical resolving power - Photomapping - Spectroscopy
Uncontrolled terms:3d convolutional neural network - Convolutional neural network - Discrepancy - Gradient transfer - HyperSpectral - Hyperspectral image - Multispectral image - Multispectral images - Pan-sharpening - Spectral super-resolution - Superresolution
Classification code:405.3 Surveying - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 742.1 Photography
DOI:10.3390/rs14174250
Funding details: Number: 2022JQ-647, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research was funded by the Natural Science Basic Research Program of ShaanXi (Program No. 2022JQ-647).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 430>
Accession number:20222512243130
Title:Graphene-empowered dynamic metasurfaces and metadevices (Open Access)
Authors:Zeng, Chao (1); Lu, Hua (1); Mao, Dong (1); Du, Yueqing (1); Hua, He (1); Zhao, Wei (2); Zhao, Jianlin (1)
Author affiliation:(1) MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an; 710129, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Zhao, Wei(weiz@opt.ac.cn;JLZhao); Zhao, Jianlin(jlzhao@nwpu.edu.cn)
Source title:Opto-Electronic Advances
Abbreviated source title:Opto-Electron. Adv.
Volume:5
Issue:4
Issue date:2022
Publication year:2022
Article number:200098
Language:English
ISSN:20964579
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Metasurfaces, with extremely exotic capabilities to manipulate electromagnetic (EM) waves, have derived a plethora of advanced metadevices with intriguing functionalities. Tremendous endeavors have been mainly devoted to the static metasurfaces and metadevices, where the functionalities cannot be actively tuned in situ post-fabrication. Due to the intrinsic advantage of active tunability by external stimulus, graphene has been successively demonstrated as a favorable candidate to empower metasurfaces with remarkably dynamic tunability, and their recent advances are propelling the EM wave manipulations to a new height: from static to dynamic. Here, we review the recent progress on dynamic metasurfaces and metadevices enabled by graphene with the focus on electrically-controlled dynamic manipulation of the EM waves covering the mid-infrared, terahertz, and microwave regimes. The fundamentals of graphene, including basic material properties and plasmons, are first discussed. Then, graphene-empowered dynamic metasurfaces and metadevices are divided into two categories, i.e., metasurfaces with building blocks of structured graphene and hybrid metasurfaces integrated with graphene, and their recent advances in dynamic spectrum manipulation, wavefront shaping, polarization control, and frequency conversion in near/far fields and global/local ways are elaborated. In the end, we summarize the progress, outline the remaining challenges, and prospect the potential future developments.<br/></div> © The Author(s) 2022.
Number of references:378
Main heading:Graphene
Controlled terms:Plasmons - Terahertz waves
Uncontrolled terms:Dynamic metasurface - Electromagnetic wave manipulation - Field manipulation - Graphene plasmons - Light field manipulation - Light fields - Metasurface - Post-fabrication - Wave manipulation
Classification code:711 Electromagnetic Waves - 761 Nanotechnology - 804 Chemical Products Generally - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics
DOI:10.29026/oea.2022.200098
Funding details: Number: 11634010,11774290,11974283,61805277,91950207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 3102017AX009,3102019JC008,3102019PY002, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2019JQ-447,2020JM-130, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the National Key R&D Program of China (2017YFA0303800), the National Natural Science Foundation of China (61805277, 11634010, 91950207, 11974283, 11774290), the Fundamental Research Funds for the Central Universities (3102017AX009, 3102019PY002, 3102019JC008), and the Natural Science Basic Research Program of Shaanxi (2019JQ-447, 2020JM-130).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 431>
Accession number:20222612302379
Title:Multi-Section Waveguide Method for Facet Temperature Reduction and Improved Reliability of High-Power Laser Diodes (Open Access)
Authors:Ebadi, Kaveh (1); Liu, Yuxian (2, 3); Sünnetçioğlu, Ali Kaan (1); Gündoğdu, Sinan (1); Şengül, Serdar (1); Zhao, Yuliang (2, 3); Lan, Yu (2, 3); Yang, Guowen (2, 3, 4); Demir, Abdullah (1)
Author affiliation:(1) Bilkent University, UNAM - Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Dogain Laser Technology (Suzhou) Co., Ltd., Suzhou; 215123, China
Corresponding author:Demir, Abdullah(abdulllah.demir@unam.bilkent.edu.tr)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12141
Part number:1 of 1
Issue title:Semiconductor Lasers and Laser Dynamics X
Issue date:2022
Publication year:2022
Article number:1214104
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510651586
Document type:Conference article (CA)
Conference name:Semiconductor Lasers and Laser Dynamics X 2022
Conference date:May 9, 2022 - May 20, 2022
Conference location:Virtual, Online
Conference code:180193
Sponsor:City of Strasbourg; CNRS; iCube; IdEx University of Strasbourg; The Society of Photo-Optical Instrumentation Engineers (SPIE); Universite de Strasbourg
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Catastrophic optical mirror damage (COMD) limits the output power and reliability of lasers diodes (LDs). Laser self-heating together with facet absorption of output power cause the facet to reach a critical temperature (Tc), resulting in COMD and irreversible device failure. The self-heating of the laser contributes significantly to the facet temperature, but it has not been addressed so far. We implement a multi-section waveguide method where the heat is separated from reaching the output facet by exploiting an electrically isolated window. The laser waveguide is divided into two electrically isolated laser and transparent window sections. The laser section is pumped at high current levels to achieve laser output, and the passive waveguide is biased at low injection currents to obtain a transparent waveguide with negligible heat generation. Using this design, we demonstrate facet temperatures lower than the junction temperature of the laser even at high output power operation. While standard LDs show COMD failures, the multi-section waveguide LDs are COMD-free. Our technique and results provide a pathway for high-reliability LDs, which would find diverse applications in semiconductor lasers.<br/></div> © 2022 SPIE.
Number of references:24
Main heading:Semiconductor lasers
Controlled terms:High power lasers - Laser mirrors - Pumping (laser) - Reliability - Waveguides
Uncontrolled terms:Catastrophic optical mirror damages - Critical temperatures - Damage limits - Device failures - Facet temperature - High power laser diode - Multi-section - Output power - Self-heating - Temperature reduction
Classification code:714.3 Waveguides - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 744.7 Laser Components
DOI:10.1117/12.2621651
Funding details: Number: 118F057, Acronym: TÜBİTAK, Sponsor: Türkiye Bilimsel ve Teknolojik Araştırma Kurumu;
Funding text:The authors gratefully acknowledge the financial support in part from TUBITAK 118F057.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 432>
Accession number:20231213758750
Title:Staging of Skin Cancer Based on Hyperspectral Microscopic Imaging and Machine Learning (Open Access)
Authors:Liu, Lixin (1, 2); Qi, Meijie (1, 2); Li, Yanru (1); Liu, Yujie (1); Liu, Xing (3); Zhang, Zhoufeng (2); Qu, Junle (4)
Author affiliation:(1) School of Optoelectronic Engineering, Xidian University, Xi’an; 710071, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen; 518118, China; (4) College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China
Corresponding authors:Liu, Lixin(lxliu@xidian.edu.cn); Liu, Xing(liuxing@sztu.edu.cn)
Source title:Biosensors
Abbreviated source title:Biosensors
Volume:12
Issue:10
Issue date:October 2022
Publication year:2022
Article number:790
Language:English
E-ISSN:20796374
CODEN:BISSED
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Skin cancer, a common type of cancer, is generally divided into basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and malignant melanoma (MM). The incidence of skin cancer has continued to increase worldwide in recent years. Early detection can greatly reduce its morbidity and mortality. Hyperspectral microscopic imaging (HMI) technology can be used as a powerful tool for skin cancer diagnosis by reflecting the changes in the physical structure and microenvironment of the sample through the differences in the HMI data cube. Based on spectral data, this work studied the staging identification of SCC and the influence of the selected region of interest (ROI) on the staging results. In the SCC staging identification process, the optimal result corresponded to the standard normal variate transformation (SNV) for spectra preprocessing, the partial least squares (PLS) for dimensionality reduction, the hold-out method for dataset partition and the random forest (RF) model for staging identification, with the highest staging accuracy of 0.952 ± 0.014, and a kappa value of 0.928 ± 0.022. By comparing the staging results based on spectral characteristics from the nuclear compartments and peripheral regions, the spectral data of the nuclear compartments were found to contribute more to the accurate staging of SCC.<br/></div> © 2022 by the authors.
Number of references:20
Main heading:Machine learning
Controlled terms:Dermatology - Diseases - Forestry - Hyperspectral imaging - Image segmentation - Least squares approximations
Uncontrolled terms:Cancer classification - HyperSpectral - Hyperspectral microscopic imaging technology - Imaging technology - Machine-learning - Microscopic imaging - Skin cancers - Spectral data - Squamous cell carcinoma - Staging identification
Classification code:461.6 Medicine and Pharmacology - 723.4 Artificial Intelligence - 746 Imaging Techniques - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.6 Numerical Methods
DOI:10.3390/bios12100790
Funding details: Number: LSIT202005W, Acronym: -, Sponsor: -;Number: GDRC202106, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: 2020JQ-204, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This research was funded by the 111 Project, Natural Science Basic Research Program of Shaanxi (2020JQ-204), the Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT202005W), and the Natural Science Foundation of Top Talent of SZTU (GDRC202106).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 433>
Accession number:20224212986353
Title:Scalable, Autonomous On-Chip Picosecond Pulse-Shaping Enabled by Smart Optimization
Authors:Fischer, Bennet (1); Chemnitz, Mario (1); MacLellan, Benjamin (1); Roztocki, Piotr (1); Helsten, Robin (1); Wetzel, Benjamin (2); Little, Brent (3); Chu, Sai (4); Moss, David (5); Azaña, José (1); Morandotti, Roberto (1)
Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1P7, Canada; (2) XLIM Research Institute, CNRS, UMR 7252, Université de Limoges, Limoges; 87060, France; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xinxi Ave, Shaanxi, Xi'an, China; (4) City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (5) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia
Source title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Issue date:2022
Publication year:2022
Article number:STh2E.5
Language:English
ISBN-13:9781957171050
Document type:Conference article (CA)
Conference name:2022 Conference on Lasers and Electro-Optics, CLEO 2022
Conference date:May 15, 2022 - May 20, 2022
Conference location:San Jose, CA, United states
Conference code:182946
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a scalable, autonomous on-chip pulse shaping system based on temporal coherence synthesis. The inclusion of smart optimization algorithms enables robust, and reconfigurable pulse-shaping over a wide range of input and target durations.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:9
Uncontrolled terms:Chip pulse - On chips - Optimisations - Optimization algorithms - Picosecond pulse - Pulse-shaping - Reconfigurable - Temporal coherence
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 434>
Accession number:20223012413010
Title:Large aperture phase-coded diffractive lens for achromatic and 16° field-of-view imaging with high efficiency
Authors:Ma, Gu (1, 2); Zheng, Peng-Lei (1, 2); Hu, Zheng-Wen (1, 2); Ma, Suo-Dong (1, 2, 3); Xu, Feng (1, 2); Pu, Dong-Lin (1, 2); Wang, Qin-Hua (1, 2)
Author affiliation:(1) School of Optoelectronic Science and Engineering, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou; 215006, China; (2) Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies, Education Ministry of China, Soochow University, Suzhou; 215006, China; (3) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China
Corresponding authors:Xu, Feng(xf750617@suda.edu.cn); Wang, Qin-Hua(chinhua.wang@suda.edu.cn)
Source title:Chinese Physics B
Abbreviated source title:Chin. Phys.
Volume:31
Issue:7
Issue date:July 1, 2022
Publication year:2022
Article number:074210
Language:English
ISSN:16741056
E-ISSN:20583834
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Diffractive lenses (DLs) can realize high-resolution imaging with light weight and compact size. Conventional DLs suffer large chromatic and off-axis aberrations, which significantly limits their practical applications. Although many achromatic methods have been proposed, most of them are used for designing small aperture DLs, which have low diffraction efficiencies. In the designing of diffractive achromatic lenses, increasing the aperture and improving the diffraction efficiency have become two of the most important design issues. Here, a novel phase-coded diffractive lens (PCDL) for achromatic imaging with a large aperture and high efficiency is proposed and demonstrated experimentally, and it also possesses wide field-of-view (FOV) imaging at the same time. The phase distribution of the conventional phase-type diffractive lens (DL) is coded with a cubic function to expand both the working bandwidth and the FOV of conventional DL. The proposed phase-type DL is fabricated by using the laser direct writing of grey-scale patterns for a PCDL of a diameter of 10 mm, a focal length of 100 mm, and a cubic phase coding parameter of 30π. Experimental results show that the working bandwidth and the FOV of the PCDL respectively reach 50 nm and 16° with over 8% focusing efficiency, which are in significant contrast to the counterparts of conventional DL and in good agreement with the theoretical predictions. This work provides a novel way for implementing the achromatic, wide FOV, and high-efficiency imaging with large aperture DL.<br/></div> © 2022 Chinese Physical Society and IOP Publishing Ltd.
Number of references:23
Main heading:Bandwidth
Controlled terms:Aberrations - Diffraction efficiency
Uncontrolled terms:42.25. - 42.79. - Achromatic imaging - Bh - Diffractive lens - Field of views - Fx - Higher efficiency - Large aperture - Phase coding
Classification code:716.1 Information Theory and Signal Processing
Numerical data indexing:Percentage 8.00E+00%, Size 1.00E-01m, Size 1.00E-02m, Size 5.00E-08m
DOI:10.1088/1674-1056/ac560c
Funding details: Number: SPMT2021001, Acronym: -, Sponsor: -;Number: 18KJB140015, Acronym: -, Sponsor: -;Number: 61775154, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: PAPD, Sponsor: Priority Academic Program Development of Jiangsu Higher Education Institutions;
Funding text:Project supported by the National Natural Science Foundation of China (Grant No. 61775154), the Natural Science Foundation of the Jiangsu Higher Education Institutions, China (Grant No. 18KJB140015), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, and the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology, China (Grant No. SPMT2021001).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 435>
Accession number:20230413449646
Title:Conceptual Design Study of the Science Payload for the Earth 2.0 Mission
Authors:Chen, Yonghe (1); Yin, Dayi (1); Wei, Chuanxin (1); Liu, Xiaohua (1); Zhang, Quan (1); Yang, Baoyu (1); Zhu, Yuji (1); Ge, Jian (4); Zhou, Dan (2); Zhang, Congcong (2); Li, Yan (2); Song, Zongxi (3); Gao, Wei (3); Li, Wei (3); Wang, Fengtao (3); Shen, Chao (3); Pan, Yue (3); Zhang, Hongfei (4); Wang, Jian (4); Wang, Hui (4)
Author affiliation:(1) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, No. 500, Yutian Rd., Shanghai, China; (2) Shanghai Astronomical Observatory, Chinese Academy of Sciences, No. 80, Nandan Rd., Shanghai, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 16, Xinxi Avenue, Chang'an District, Shanxi, Xi'an, China; (4) Department of Modern Physics, University of Science and Technology of China, No.96, Jinzhai Rd., Anhui, Hefei, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:121804A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a space mission in China which will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years. ET's scientific payload consist of six 30cm diameter transit telescopes with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. Each telescope is equipped with a camera with 2×2 9K×9K CMOS detectors, and Front-end Electronics (FEE). Each transit telescope is an f/1.57 eight-lens refractive optical system while the microlensing telescope is an f/17.2 catadioptric optical system with diffraction-limited design. The diameter of 90% Encircled Energy (EE90) for transit telescopes is within 5×5 pixels while the FWHM of PSF for the microlensing telescope is less than 0.78 arcsec. Fine Guidance Sensors are mounted at the four edges of the CMOS camera. All seven telescopes are fixed on a common mounting reference plate, and a large sun shield is used to block the heat flow from the Sun and provide a stable thermal environment for the telescopes. It also blocks straylight form the Sun, Earth, and the Moon. Each telescope has an additional top hood to block straylight incident at a large angle while the top hood is also used as a radiator to cool the detectors to below - 40℃. With PID heating loops, each telescope will work at -30±0.3℃ while the detectors work at - 40±0.1℃. Details of the conceptual design for the scientific payload will be presented.<br/></div> © 2022 SPIE.
Number of references:6
Main heading:Earth (planet)
Controlled terms:Cameras - CMOS integrated circuits - Integrated circuit design - Lenses - Moon - Optical systems - Orbits - Telescopes
Uncontrolled terms:CMOS detectors - Design studies - Earth 2.0 - Field of views - Front end - Micro-lensing - Scientific payloads - Space instrument - Space missions - Transit
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment
Numerical data indexing:Age 4.00E+00yr, Percentage 9.00E+01%, Size 3.00E-01m, Size 3.50E-01m, Temperature 9.00E+00K
DOI:10.1117/12.2630044
Funding details: Number: XDA 15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:project. ET is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Science, Grant No. XDA 15020600.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 436>
Accession number:20222512242723
Title:Mid-wave infrared planar optical device via femtosecond laser ablation on a sulfur-based polymeric glass surface (Open Access)
Authors:Liu, Feng (1); Zhou, Liang (1); Cheng, Huachao (1); Li, Peng (1); Liu, Sheng (1); Mao, Shan (1); Jin, Chuan (2); Zhu, Xiangping (2); Zhao, Jianlin (1)
Author affiliation:(1) MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an; 710129, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Zhao, Jianlin(jlzhao@nwpu.edu.cn)
Source title:Optical Materials Express
Abbreviated source title:Opt. Mater. Express
Volume:12
Issue:7
Issue date:July 1, 2022
Publication year:2022
Pages:2541-2549
Language:English
E-ISSN:21593930
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Sulfur-based polymer materials are attractive for infrared (IR) applications, as they exhibit profoundly high IR transparency, low temperature processability, and higher refractive index relative to conventional organic polymers. In this paper, the laser induced surface damage threshold of such sulfur-based polymeric glass is experimentally studied with femtosecond laser pulse exposure. The single- and multi-shot laser damage thresholds are determined as 41.1 mJ/cm<sup>2</sup> and 32.4 mJ/cm<sup>2</sup>, respectively, and line width of laser scanning is proved to be controllable by laser energy implantation dose. The results enrich the technical knowledge of such novel optical material, and predict its processability by laser surface inscription. While, the amplitude-type binary planar devices based on femtosecond laser ablation are fabricated, and their imaging abilities are performed both in visible light and mid-wave IR regions.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Number of references:31
Main heading:Femtosecond lasers
Controlled terms:Glass - Laser ablation - Laser damage - Laser pulses - Monomers - Organic lasers - Organic polymers - Refractive index - Sulfur - Temperature
Uncontrolled terms:Glass surfaces - High refractive - Infrared applications - Infrared transparency - Laser-induced surface damage - Lasers ablations - Lows-temperatures - Planar optical devices - Polymer materials - Processability
Classification code:641.1 Thermodynamics - 641.2 Heat Transfer - 741.1 Light/Optics - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 804 Chemical Products Generally - 812.3 Glass - 815.1.1 Organic Polymers
Numerical data indexing:Energy 2.00E-03J, Energy 3.24E-02J, Energy 4.11E-02J
DOI:10.1364/OME.459018
Funding details: Number: 095920201316, Acronym: -, Sponsor: -;Number: LSIT202006W, Acronym: -, Sponsor: -;Number: 11634010,12074312,61905195, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 310202011QD001,310202011QD005, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Key Research and Development Program of China (2017YFA0303800); National Natural Science Foundation of China (11634010, 12074312, 61905195); Fundamental Research Funds for the Central Universities (310202011QD001, 310202011QD005); 2020 Xi’an Association for Science and Technology of Young Talents Support Project (095920201316); Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT202006W).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 437>
Accession number:20222112145643
Title:Contrasting time-resolved characteristics of laser-induced plasma spatially confined by conical cavities with different bottom diameters
Authors:Liu, Yinghua (1, 2); Xu, Boping (1, 2); Lei, Bingying (1, 2); Liu, Simeng (1, 2); Wang, Jing (1, 2); Zeng, Jianhua (1, 2); Wang, Yishan (1, 2); Duan, Yixiang (3); Zhao, Wei (1, 2); Tang, Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an; 710127, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Applied Physics B: Lasers and Optics
Abbreviated source title:Appl Phys B
Volume:128
Issue:6
Issue date:June 2022
Publication year:2022
Article number:103
Language:English
ISSN:09462171
CODEN:APBOEM
Document type:Journal article (JA)
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">In this work, conical cavities with a fixed top diameter and varied bottom diameter have been utilized to improve the signal intensity, signal-to-noise ratio (SNR), and signal stability of laser-induced breakdown spectroscopy (LIBS). It is observed that the postponement of the maximum enhancement of spectral intensity and SNR occurs abnormally with decreasing the bottom diameter due to the energy dissipation from the plasma to the cavity walls. Optimization of the cavity size indicates that the conical cavity is superior to the widely-used cylindrical cavity in improving the performance of LIBS. It is also found that the emission enhancement in the conical cavity with larger bottom diameters is attributed to the increase in plasma temperature and electron number density, but the enhancement in the conical cavity with smaller bottom diameters is ascribed to the growth of electron number density. For the first time, the exact efficiencies of conical cavities suppressing the total number density fluctuation are acquired to evaluate the performance of improving signal stability through analysis of the signal uncertainty composition.<br/></div> © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:47
Main heading:Signal to noise ratio
Controlled terms:Laser produced plasmas - Energy dissipation - Signal analysis - Uncertainty analysis
Uncontrolled terms:Conical cavity - Electron number densities - Intensity signal - Laser induced plasma - Noise signals - Performance - Signal intensities - Signal stability - Spectral intensity - Time-resolved
Classification code:525.4 Energy Losses (industrial and residential) - 716.1 Information Theory and Signal Processing - 744.9 Laser Applications - 922.1 Probability Theory - 932.3 Plasma Physics
DOI:10.1007/s00340-022-07823-w
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:The authors acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 51877210, 52177166), the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-309), the Natural Science Basic Research Program of Shaanxi (Grant No. 2019JCW-03), the Key Deployment Research Program of XIOPM (Grant No. S19-020-III), the Major Science and Technology Infrastructure Pre-research Program of the CAS (Grant No. J20-021-III), and the Open Research Fund of Key Laboratory of Spectral Imaging Technology of the CAS (Grant No. LSIT201807G).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 438>
Accession number:20222412229316
Title:Missing recognition of highway shading board based on deep convolution segmentation and correction
Authors:Dong, Yuanshuai (1, 2, 3); Zhang, Yanhong (1, 2, 3); Hou, Yun (1, 2, 3); Tong, Xinlong (1, 2, 3); Wu, Qingquan (4); Zhou, Zuofeng (5); Cao, Yuxuan (1, 2, 3)
Author affiliation:(1) China Highway Engineering Consulting Group Company Ltd, Beijing; 100089, China; (2) China Communications Construction Company Ltd, Research and Development Center on Highway Pavement Maintenance Technology, Beijing; 100089, China; (3) R. and D. Ctr. of Transp. Indust. of Technol., Mat. and Equip. of Hwy. Construction and Maintenance, Beijing; 100089, China; (4) Key & Core Technology Innovation Institute of the Greater Bay Area, Guangzhou; 510530, China; (5) Cas Industrial Development Co., Ltd, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710000, China
Corresponding author:Tong, Xinlong(maniga@163.com)
Source title:2022 IEEE Asia-Pacific Conference on Image Processing, Electronics and Computers, IPEC 2022
Abbreviated source title:IEEE Asia-Pacific Conf. Image Process., Electron. Comput., IPEC
Part number:1 of 1
Issue title:2022 IEEE Asia-Pacific Conference on Image Processing, Electronics and Computers, IPEC 2022
Issue date:2022
Publication year:2022
Pages:1455-1460
Language:English
ISBN-13:9781665409025
Document type:Conference article (CA)
Conference name:2022 IEEE Asia-Pacific Conference on Image Processing, Electronics and Computers, IPEC 2022
Conference date:April 14, 2022 - April 16, 2022
Conference location:Dalian, China
Conference code:179500
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The lack of highway shading panels poses a major hidden danger to driving safety. It is urgent to study a method that can automatically detect the disease of the anti-glare panel and provide help for the maintenance of traffic safety auxiliary facilities. In the method for identifying the absence of shading panels on highways based on deep convolutional image segmentation and correction, the PointRend model based on deep convolutional networks (CNN) is first used to achieve the pixel-level fine segmentation of the shading plate area, and then the multiple images in the same image are segmented. A shading plate area, on the largest outer polygon estimated by the convex hull algorithm, the optimal outer quadrilateral is determined according to the distance between the vertices, and then the shading plate area correction is completed by affine transformation, and finally through the image one-dimensional projection mapping and adjacent shading The distance correlation between the boards realizes the identification and positioning of the missing light-shielding board. The highway shading plate missing recognition method based on deep convolution image segmentation and correction uses the vertex distance to quickly determine the external quadrilateral, which is suitable for estimating the shape of the area in a dynamic scene. After actual testing and verification, it can accurately and efficiently identify the disease of the anti-glare plate. Compared with traditional image segmentation methods, the method using the PointRend target segmentation model has better segmentation quality for target details, and it is more robust when dealing with background interference.<br/></div> © 2022 IEEE.
Number of references:11
Main heading:Convolution
Controlled terms:Computational geometry - Glare - Image segmentation - Mapping - Object detection
Uncontrolled terms:Anti glares - Convex hull - Deep convolution network - Driving safety - Image-correction - Images segmentations - Projection mapping - Shading board - Two-dimensional - Two-dimensional convex hull
Classification code:405.3 Surveying - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.1109/IPEC54454.2022.9777346
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 439>
Accession number:20221311845973
Title:Multiple Modes Response of Co-Aperture 2D/1D Phototransistors
Authors:Liu, Changlong (1, 2); Zhang, Xutao (3, 4); Guo, Feng (3, 4); Zhang, Shi (1); Wang, Jian (5); Yang, Lijie (6); Guo, Cheng (6); Li, Guanhai (1, 2); Xu, Zhiwei (6); Wang, Lin (2); Gan, Xuetao (3, 4); Chen, Pingping (2); Chen, Xiaoshuang (1, 2); Lu, Wei (1, 2)
Author affiliation:(1) College of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, No. 1, Sub-Lane Xiangshan, Xihu District, Hangzhou; 310024, China; (2) State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-Tian Road, Shanghai; 200083, China; (3) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (4) Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an; 710072, China; (5) State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai; 200062, China; (6) Zhejiang Lab Nanhu Headquarters, Kechuang Avenue, Yuhang District, Hangzhou; 311100, China
Corresponding authors:Chen, Xiaoshuang(xschen@mail.sitp.ac.cn); Wang, Lin(wanglin@mail.sitp.ac.cn); Gan, Xuetao(xuetaogan@nwpu.edu.cn)
Source title:Advanced Materials Interfaces
Abbreviated source title:Adv. Mater. Interfaces
Volume:9
Issue:12
Issue date:April 22, 2022
Publication year:2022
Article number:2102568
Language:English
E-ISSN:21967350
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Strict requirements for target detection and identification of the complex background have increased because a single detection method is susceptible to environmental factors. The abilities to use terahertz imaging systems with high photoresponsivity and polarization sensitivity are of central importance to practical photodetectors. The present technology for high-sensitivity, polarization THz detectors integrated into a compact, common aperture (co-aperture) system remains largely unexplored challenges. By exploiting the inherent features of graphene/Bi<inf>2</inf>Te<inf>3</inf> Dirac material and InAs nanowire, the plasma-wave and thermoelectric co-aperture phototransistors with a selective, synchronous, and controllable operating modes are devised in the same field of view, which provide remarkable efficiencies for THz-light harvesting on-chip. The achieved selective detection, better than that of single nanowire phototransistor, exhibits excellent sensitivity of 18.5 mA W<sup>−1</sup> (12 V W<sup>−1</sup>) in graphene/Bi<inf>2</inf>Te<inf>3</inf> channel and 3.5 mA W<sup>−1</sup> (400 V W<sup>−1</sup>) in InAs nanowire channel, corresponding to the noise equivalent power of less than 0.1 nW/Hz<sup>0.5</sup>. The results are exploited to highlight a novel strategy for the realization of efficient co-aperture phototransistors toward tunable, multiple modes, polarization THz detection by combining with in situ integration advantages of various materials, compatibility mechanisms, integration structures with metamaterials.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:27
Main heading:Graphene
Controlled terms:Nanowires - Indium arsenide - Terahertz waves - Bismuth compounds - Polarization - III-V semiconductors - Tellurium compounds
Uncontrolled terms:Common aperture - Complex background - Detection and identifications - Graphene/bi 2te 3 - Inas nanowire - Mode response - Multiple modes - Target's identifications - Targets detection - Tera Hertz
Classification code:711 Electromagnetic Waves - 712.1 Semiconducting Materials - 761 Nanotechnology - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 933 Solid State Physics
Numerical data indexing:Electric current 1.85E-02A, Electric current 3.50E-03A, Power 1.00E-10W, null 1.20E+01null, null 4.00E+02null
DOI:10.1002/admi.202102568
Funding details: Number: ZJ2021019, Acronym: -, Sponsor: -;Number: 2017YFA0305500,2018YFA0306200, Acronym: -, Sponsor: -;Number: 2021MB0AB01, Acronym: -, Sponsor: -;Number: 61521005,61875217,61875223,61991442,62005249,91850208, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: LQ20F050005, Acronym: ZJNSF, Sponsor: Natural Science Foundation of Zhejiang Province;
Funding text:This work was supported in part by the State Key Program for Basic Research of China (2018YFA0306200, 2017YFA0305500), the National Natural Science Foundation of China (Grant No. 61875223, 61875217, 91850208, 61991442, 61521005, and 62005249), the Zhejiang Provincial Natural Science Foundation (LQ20F050005), Excellent Postdoctoral Research Projects of Zhejiang Province (ZJ2021019) and Zhejiang Lab (2021MB0AB01). The authors thank Westlake Center for Micro/Nano Fabrication for the facility support and technical assistance.This work was supported in part by the State Key Program for Basic Research of China (2018YFA0306200, 2017YFA0305500), the National Natural Science Foundation of China (Grant No. 61875223, 61875217, 91850208, 61991442, 61521005, and 62005249), the Zhejiang Provincial Natural Science Foundation (LQ20F050005), Excellent Postdoctoral Research Projects of Zhejiang Province (ZJ2021019) and Zhejiang Lab (2021MB0AB01). The authors thank Westlake Center for Micro/Nano Fabrication for the facility support and technical assistance.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 440>
Accession number:20221611966207
Title:Characterization of the laser-induced breakdown spectroscopy near the gas–liquid two-phase interface
Authors:Liu, Simeng (1, 2); Liu, Yinghua (1, 2); Xu, Boping (1, 2); Lei, Bingying (1, 2); Ran, Shuang (1, 2); Wang, Yishan (1, 2); Duan, Yixiang (1, 3); Zhao, Wei (1, 2); Tang, Jie (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xinxi Road 17, Xi’an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Yuquan Road 19, Beijing; 100049, China; (3) Research Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Wangjiang Road 29, Chengdu; 610065, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:11
Issue date:April 10, 2022
Publication year:2022
Pages:3008-3018
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The characterization of laser-induced breakdown spectroscopy (LIBS) near the gas–liquid two-phase interface was investigated with the laser acting on the sample along the horizontal direction. Simulation of the laser beam focusing process and observation of laser beam spot images show that difference in focusing positions in the air and the solution results from refraction of the laser beam entering the solution from the air and the change of propagation direction on the container lateral. The peak power and mean irradiance of the focused laser beam spot increase with the distance away from the interface, which is attributed to the fact that the loss of laser energy due to the refraction and reflection of light at the interface decreases with the focusing position moving away from the interface. This variation trend of laser irradiance allows for the growth of the spectral line intensity and lifetime with increasing the distance from the interface. The plasma electron density and temperature decrease with the delay time but increase with the distance away from the interface at the same delay time. Our findings help us to gain more insight into the characteristics and evolution mechanisms of LIBS produced near the gas–liquid two-phase interface, which provides theoretical guidance for the correction of LIBS spectra especially in water pollution monitoring.<br/></div> © 2022 Optica Publishing Group
Number of references:40
Main heading:Laser beams
Controlled terms:Liquids - Atomic emission spectroscopy - Focusing - Phase interfaces - Refraction - Water pollution - Laser induced breakdown spectroscopy
Uncontrolled terms:Beam spot - Delay Time - Focused laser beams - Gas liquids - Laser beam focusing - Peak power - Propagation direction - SPOT image - Spot images - Two-phase interfaces
Classification code:453 Water Pollution - 744.8 Laser Beam Interactions - 801.4 Physical Chemistry - 931.1 Mechanics
DOI:10.1364/AO.451217
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (51877210, 52177166); Natural Science Foundation of Shaanxi Province (2020JM-309); Natural Science Basic Research Program of Shaanxi Province (2019JCW-03); Key Deployment Research Program of XIOPM (S19-020-III); Major Science and Technology Infrastructure Pre-research Program of the CAS (J20-021-III); Open Research Fund of Key Laboratory of Spectral Imaging Technology of the CAS (LSIT201807G).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 441>
Accession number:20220257206
Title:Flat-Bottom Dark Gap Modes as a New Localized State Supported by Periodic Nanostructures
Authors:Li, Jiawei (1, 2, 3); Zhang, Yanpeng (2); Zeng, Jianhua (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shaanxi Key Lab of Information Photonic Technique, Xi’an Jiaotong University, Xi’an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:SSRN
Issue date:July 12, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">We introduce the conception of flat-bottom dark gap modes in one-dimensional periodic nanostructures configured as periodic alternations (nanoscale stripes) of the local linear and nonlinear properties, resembling the Kronig-Penney model with combined nanoscopic linear-nonlinear lattices. We argue that, the flat-bottom gap modes, representing a new type of localized dark state in forbidden bandgap, can be implemented in BoseEinstein condensates and optics with periodic potentials like optical lattices and photonic crystals at nanoscale, with the existing experimental technologies. In addition, the fundamental localized dark gap modes and their higher-order ones, dark gap solitons and soliton clusters, are also predicted. Dynamics and stability of all the localized gap modes are scrutinized in two ways, linear-stability analysis and direct perturbed simulations. Our results open a new route to studying soliton physics in the context of periodic nanostructures where new localized states like flat-bottom dark gap solitons may exist.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:55
Main heading:Nanostructures
Controlled terms:Bose-Einstein condensation - Crystal lattices - Linear stability analysis - Nonlinear equations - Optical lattices - Solitons - Statistical mechanics
Uncontrolled terms:Dark solitons - Gap modes - Gap soliton - Kronig-Penney potential - Local linear - Localised - Localized state - Nano scale - One-dimensional - Periodic nanostructure
Classification code:744.8 Laser Beam Interactions - 761 Nanotechnology - 921 Mathematics - 922.2 Mathematical Statistics - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 933 Solid State Physics - 933.1.1 Crystal Lattice
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4160576
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 442>
Accession number:20220409517
Title:Optimized Design of Slab Width for High Performance Silicon Modulator
Authors:Chang, Chang (4, 5); Cui, Jishi (1); Chen, Hongmin (1); Cui, Wenjing (1); Yang, Fenghe (1); Xu, Xiaofu (2, 3)
Author affiliation:(1) School of Information Engineering, Sanming University, Sanming; 365004, China; (2) School of Mechanical and Electrical Engineering, Sanming University, Sanming; 365004, China; (3) Key Laboratory of Equipment Intelligent Control of Fujian Higher Education Institute, Sanming; 365004, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Shaanxi, Xi’an; 710119, China; (5) University of Chinese Academy of Science, Beijing, China
Corresponding author:Chang, Chang(changchang@opt.ac.cn)
Source title:SSRN
Issue date:October 18, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we extended the n-type slab width of the silicon modulator to 2.8 times compared with the p-type. The unbalanced slab will make a larger electro-optical bandwidth. Benefitted from the mobility difference between electrons and holes, the charging and discharging duration in the p-type region would be longer than the holes. Therefore, a rational extension of the n-type slab will not affect the charge-discharge duration of the modulator. Meanwhile, extending the n-type slab will reduce the parasitic capacitance of the transmission line electrodes and then the bandwidth of the modulator would be increased. The extending of the n-type slab could also reduce the insertion loss thanks to the reduction of the light absorption introduced by the electrodes at the same time. This design principle provides a reference for the design of the n- and p-type regions for other active devices.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:25
Main heading:Capacitance
Controlled terms:Bandwidth - Electric discharges - Electrodes - Light absorption - Modulators - Silicon photonics
Uncontrolled terms:Charge-discharge - Electro-optical - Electrons and holes - Optical band width - Optimized designs - P-type - Performance - Silicon modulators - Silicon photonics - Slab width
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4251033
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 443>
Accession number:20222412207450
Title:Light modulation based on the enhanced Kerr effect in molybdenum disulfide nanostructures with curved features
Authors:Li, Tianlun (1); Li, Xiaodie (1); Gao, Duorui (2, 3); Mao, Jianyong (1); Hou, Yaping (1); Chen, Hui (1); Li, Feng (1); Zhang, Yanpeng (1); Fang, Jixiang (1); Zhang, Lei (1)
Author affiliation:(1) Key Laboratory of Physical Electronics and Devices of Ministry of Education & Shaanxi Key Laboratory of Information Photonic Technique, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhang, Lei(eiezhanglei@xjtu.edu.cn)
Source title:Physical Chemistry Chemical Physics
Abbreviated source title:Phys. Chem. Chem. Phys.
Volume:24
Issue:20
Issue date:May 2, 2022
Publication year:2022
Pages:12208-12213
Language:English
ISSN:14639076
CODEN:PPCPFQ
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">A novel type of molybdenum disulfide (MoS<inf>2</inf>) nanoparticles (NPs) was chemically synthesized, which possessed curved features with three-dimensional (3D) freedom compared with planar two-dimensional (2D) materials. Due to the introduction of curved features, the synthesized NPs exhibited a strongly enhanced nonlinear refractive index (n<inf>2</inf> ∼ 10<sup>−5</sup> cm<sup>−2</sup> W<sup>−1</sup>) and third-order susceptibility (χ<sup>(3)</sup> ∼ 10<sup>−7</sup> esu), which were experimentally verified by the spatial self-phase modulation effect in the visible wavelength range. Both the nonlinear parameters were two orders of magnitude higher than their planar MoS<inf>2</inf> nanostructure counterparts. In addition, the relative change of the effective nonlinear refractive index Δn<inf>2</inf>/n<inf>2</inf> was found to be distinctly dependent on the intensity of the applied electromagnetic field. Moreover, an all-optical modulation was experimentally realized based on the spatial cross-phase modulation effect. Our results demonstrate planar MoS<inf>2</inf> materials with 3D features as potential candidates for next generation all-optical applications and open a substantial approach for the design of efficient nanomaterials with favorable optical nonlinearity.<br/></div> © 2022 The Royal Society of Chemistry
Number of references:25
Main heading:Molybdenum compounds
Controlled terms:Electromagnetic fields - Layered semiconductors - Nanostructures - Nonlinear optics - Optical Kerr effect - Phase modulation - Refractive index - Sulfur compounds - Synthesis (chemical)
Uncontrolled terms:All optical - Index n - Kerr effects - Modulation effects - Nonlinear refractive index - Spatial self-phase modulation - Synthesised - Third-order susceptibility - Two-dimensional - Visible-wavelength range
Classification code:701 Electricity and Magnetism - 712.1 Semiconducting Materials - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 761 Nanotechnology - 802.2 Chemical Reactions - 933 Solid State Physics
Numerical data indexing:Power 2.00E+00W, Size 5.00E-02m
DOI:10.1039/d2cp00374k
Funding details: Number: P30CA008748, Acronym: NCI, Sponsor: National Cancer Institute;
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 444>
Accession number:20224012816583
Title:Multi-modulation compatible miniaturization system for FSO communication assisted by chirp-managed laser (Open Access)
Authors:Gao, Duorui (1, 2); Li, Tianlun (3); Bai, Zhaofeng (1); Ma, Rong (1, 2); Xie, Zhuang (1, 2); Jia, Shuaiwei (1, 2); Wang, Wei (1, 2); Xie, Xiaoping (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Physical Electronics and Devices of Ministry of Education, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Gao, Duorui(gaoduorui@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:18
Issue date:August 29, 2022
Publication year:2022
Pages:32306-32316
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, the thriving satellite laser communication industry has been severely hindered by the limitations of incompatible modulation formats and restricted Size Weight and Power (SWaP). A multi-modulation compatible method serving for free-space optical (FSO) communication has been proposed assisted by chirp-managed laser (CML). The corresponding demonstration system has been established for realizing free-switching between intensity (OOK) and phase modulation (RZ-DPSK). The feasibility and performance of system have been evaluated sufficiently when loading with 2.5 and 5 Gbps data streams, respectively. Additionally, a control-group system has been operated utilizing Mach-Zehnder modulator (MZM) for comparison between CML-based and MZM-based compatibility solutions. The OOK receiving sensitivities of CML-based system are −47.02 dBm@2.5 Gbps and −46.12 dBm@5 Gbps at BER of 1×10<sup>−3</sup> which are 0.62 dB and 1.11 dB higher than that of MZM; the receiving sensitivities of RZ-DPSK are −50.12 dBm@2.5 Gbps and −47.03 dBm@5 Gbps which are 0.79 dB and 0.47 dB higher than that of MZM respectively. Meanwhile, CML-based transmitter abandoned the traditional modulator and its complicated supporting devices which can effectively contribute to the reduction of SWaP. The CML-based system has been proven to have the compatibility between intensity and phase modulation while also possesses a miniaturized design. It may provide fresh thinking to achieve a practical miniaturization system for satisfying the requirements of space optical network in future.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:20
Main heading:Light modulators
Controlled terms:Amplitude shift keying - Chirp modulation - Light modulation - Miniature instruments - Optical communication - Optical signal processing - Phase shift keying
Uncontrolled terms:Chirp managed lasers - Free Space Optical communication - Laser-based - Laser-based systems - Mach Zehnder modulator - Miniaturisation - Multi-modulation - Power - RZ-DPSK - Satellite laser communication
Classification code:716 Telecommunication; Radar, Radio and Television - 717.1 Optical Communication Systems - 741.1 Light/Optics
Numerical data indexing:Bit rate 2.50E+09bit/s, Bit rate 5.00E+09bit/s, Decibel 1.11E+00dB, Decibel 4.70E-01dB, Decibel 6.20E-01dB, Decibel 7.90E-01dB, Decibel milliwatts 4.612E+01dBm, Decibel milliwatts 4.702E+01dBm, Decibel milliwatts 4.703E+01dBm, Decibel milliwatts 5.012E+01dBm
DOI:10.1364/OE.465160
Funding details: Number: 61231012,91638101, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018YFC0307904-02, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: xzy022021039, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Natural Science Foundation of China (61231012, 91638101); National Key Research and Development Program of China (2018YFC0307904-02); Fundamental Research Funds for the Central Universities (xzy022021039).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 445>
Accession number:20220911728059
Title:Research Status and Prospect of Laser Scribing Process and Equipment for Chemical Milling Parts in Aviation and Aerospace (Open Access)
Authors:Wang, Jian (1, 2); Liu, Qiang (1, 3); Sun, Pengpeng (1, 2); Zang, Chenxin (1, 2); Wang, Liuquan (1, 2); Ning, Zhiwei (1, 2); Li, Ming (4); Wang, Hui (5)
Author affiliation:(1) School of Mechanical Engineering and Automation, Beihang University, Beijing; 100083, China; (2) Research and Application Center of Advanced CNC Machining Technology and Innovation, Beijing; 100191, China; (3) Jiangxi Research Institute, Beihang University, Nanchang; 330096, China; (4) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (5) AECC Shenyang Liming Aero-Engine Co., Ltd, Shenyang; 110043, China
Corresponding authors:Wang, Jian(wang_jian@buaa.edu.cn); Liu, Qiang(qliusmea@buaa.edu.cn)
Source title:Micromachines
Abbreviated source title:Micromachines
Volume:13
Issue:2
Issue date:February 2022
Publication year:2022
Article number:323
Language:English
E-ISSN:2072666X
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Laser scribing in chemical milling is an important process which can effectively improve the precision and efficiency of chemical milling, and is of great significance to improve the thrust– weight ratio and manufacturing efficiency of aviation and aerospace parts. According to the scribing requirements in chemical milling for aviation and aerospace parts, the process and mechanism of laser scribing were studied and the influence of different process parameters for the quality of laser scribing was analyzed. Based on the review of related research literature, the laser scribing process, the ablation mechanism and technology of different materials and the selective laser removal process for "laser–coating–substrate" are summarized and discussed. Based on the requirements of high-precision laser scribing on complex surfaces, the current situation of laser scribing equipment is summarized. Finally, the practical challenges and key technical problems for the laser scribing process are summarized, and the application and development of laser scribing in aerospace manufacturing are prospected.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:119
Main heading:Efficiency
Controlled terms:Ablation - Aerospace engineering - Chemical analysis - Chemical equipment - Milling (machining)
Uncontrolled terms:Ablation mechanisms - Ablation technologies - Chemical milling - Laser removal - Laser scribing - Laser scribing process - Removal process - Research status - Second scribing - Selective laser removal process
Classification code:604.2 Machining Operations - 641.2 Heat Transfer - 658 Aerospace Engineering, General - 802.1 Chemical Plants and Equipment - 913.1 Production Engineering
DOI:10.3390/mi13020323
Funding details: Number: -, Acronym: XJTU, Sponsor: Xi’an Jiaotong University;Number: 2016YFB1102500, Acronym: -, Sponsor: -;
Funding text:This research was funded by the project "Research and development of laser scribing technology and equipment for annular thin-walled milled parts of aeroengine" from the national key R&D plan "Special project of additive manufacturing and laser manufacturing" (Project No.: 2016YFB1102500). Acknowledgments: The authors acknowledge X.S. Mei’s team of Xi’an Jiaotong University, Y.M. Wu’s team of Xi’an Zhongke Photoelectric Precision Engineering Co., Ltd. and J.L. Wang’s team of the Beijing Aerospace Control Instrument Research Institute.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 446>
Accession number:20222612267177
Title:Calibration Error Prediction: Ensuring High-Quality Mobile Eye-Tracking (Open Access)
Authors:Li, Beibin (1, 2); Snider, J.C. (3); Wang, Quan (4); Mehta, Sachin (5); Foster, Claire (6); Barney, Erin (3); Shapiro, Linda (1); Ventola, Pamela (7); Shic, Frederick (3, 8)
Author affiliation:(1) Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle; WA, United States; (2) Microsoft Research, Redmond; WA, United States; (3) Seattle Children's Research Institute, Seattle; WA, United States; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (5) Electrical and Computer Engineering, University of Washington, Seattle; WA, United States; (6) Department of Psychology, Binghamton University, Binghamton; NY, United States; (7) Yale Child Study Center, Yale University, New Haven; CT, United States; (8) Department of Pediatrics, University of Washington, Seattle; WA, United States
Source title:Eye Tracking Research and Applications Symposium (ETRA)
Abbreviated source title:Eye Track. Res. Appl. Symp. (ETRA)
Part number:1 of 1
Issue title:Proceedings - ETRA 2022: ACM Symposium on Eye Tracking Research and Applications
Issue date:June 8, 2022
Publication year:2022
Article number:17
Language:English
ISBN-13:9781450392525
Document type:Conference article (CA)
Conference name:2022 ACM Symposium on Eye Tracking Research and Applications, ETRA 2022
Conference date:June 8, 2022 - June 11, 2022
Conference location:Virtual, Online, United states
Conference code:180007
Sponsor:ACM SIGCHI; ACM SIGGRAPH
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Gaze calibration is common in traditional infrared oculographic eye tracking. However, it is not well studied in visible-light mobile/remote eye tracking. We developed a lightweight real-time gaze error estimator and analyzed calibration errors from two perspectives: facial feature-based and Monte Carlo-based. Both methods correlated with gaze estimation errors, but the Monte Carlo method associated more strongly. Facial feature associations with gaze error were interpretable, relating movements of the face to the visibility of the eye. We highlight the degradation of gaze estimation quality in a sample of children with autism spectrum disorder (as compared to typical adults), and note that calibration methods may improve Euclidean error by 10%.<br/></div> © 2022 Owner/Author.
Number of references:27
DOI:10.1145/3517031.3529634
Funding details: Number: 1139078,383661, Acronym: NSF, Sponsor: National Science Foundation;Number: K01 MH104739,R21 MH103550, Acronym: NIH, Sponsor: National Institutes of Health;
Funding text:This work is supported by NIH awards K01 MH104739, R21 MH103550; the NSF Expedition in Socially Assistive Robotics #1139078; and Simons Award #383661. We extend gratitude to all the families and participants who participated in our studies.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
<RECORD 447>
Accession number:20224713151320
Title:High precision reconstruction for compressed femtosecond dynamics images based on the TVAL3 algorithm (Open Access)
Authors:Yin, Fei (1, 2); Meng, Yizhao (3); Yang, Qing (1); Kai, Lin (3); Liu, Yi (3); Hou, Xun (3); Lu, Yu (3); Chen, Feng (3)
Author affiliation:(1) School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (2) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi’an; 710119, China; (3) State Key Laboratory for Manufacturing System Engineering, Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding author:Chen, Feng(chenfeng@mail.xjtu.edu.cn)
Source title:Optical Materials Express
Abbreviated source title:Opt. Mater. Express
Volume:12
Issue:11
Issue date:November 1, 2022
Publication year:2022
Pages:4435-4443
Language:English
E-ISSN:21593930
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Compressed sensing (CS) has been successfully demonstrated to reconstruct ultrafast dynamic scenes in ultrafast imaging techniques with large sequence depth. Since compressed ultrafast imaging used a two-step iterative shrinkage/thresholding (TwIST) algorithm in previous image reconstruction, some details of the object will not be recovered when the amount of data compression is large. Here we applied a more efficient Total Variation (TV) minimization scheme based on augmented Lagrangian and alternating direction algorithms (TVAL3) to reconstruct the ultrafast process. In order to verify the effectiveness of the TVAL3 algorithm, we experimentally compare the reconstruction quality of TVAL3 algorithm and TwIST algorithm in an ultrafast imaging system based on compressed-sensing and spectral-temporal coupling active detection with highest frame rate of 4.37 trillion Hz. Both dynamic and static experimental results show that, TVAL3 algorithm can not only reconstruct a rapidly moving light pulse with a more precise profile and more fitted trajectory, but also improve the quality of static objects and the speed of reconstruction. This work will advance the ultrafast imaging techniques based on compressed sensing in terms of image reconstruction quality and reconstruction speed, which finally helps promoting the application of these techniques in areas where high spatial precision is required, such as phase transitions and laser filamentation in nonlinear solids, etc.<br/></div> © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:25
Main heading:Compressed sensing
Controlled terms:Constrained optimization - Image reconstruction - Iterative methods
Uncontrolled terms:Compressed-Sensing - Dynamic images - Femtosecond dynamics - High-precision - Image-based - Images reconstruction - Iterative shrinkagethresholding algorithms - Reconstruction quality - Two-step iterative shrinkages - Ultrafast imaging
Classification code:716.1 Information Theory and Signal Processing - 921.6 Numerical Methods - 961 Systems Science
DOI:10.1364/OME.468475
Funding details: Number: 12127806,61875158,62175195, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: -, Acronym: IJL-MMMT, Sponsor: International Joint Laboratory for MicroNano Manufacturing and Measurement Technologies;
Funding text:Acknowledgments. This work is supported by the National Science Foundation of China under the Grant nos. 12127806, 62175195, 61875158, the International Joint Research Laboratory for Micro/Nano Manufacturing and Measurement Technologies, the Fundamental Research Funds for the Central Universities.National Natural Science Foundation of China (12127806, 61875158, 62175195).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 448>
Accession number:20224613127104
Title:Retrieval of Water Quality Parameters Based on Near-Surface Remote Sensing and Machine Learning Algorithm (Open Access)
Authors:Zhao, Yubo (1, 2, 3); Yu, Tao (1, 2); Hu, Bingliang (1, 2); Zhang, Zhoufeng (1, 2); Liu, Yuyang (1, 2, 4); Liu, Xiao (1, 2); Liu, Hong (1, 2, 5); Liu, Jiacheng (1, 2, 4); Wang, Xueji (1, 2); Song, Shuyao (1, 2, 4)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, Xi’an; 710119, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi’an; 710119, China; (4) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; (5) School of Electronic and Information Engineering, Xi’an Jiao Tong University, Xi’an; 710049, China
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:21
Issue date:November 2022
Publication year:2022
Article number:5305
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">With the development of industrialization and urbanization, the consumption and pollution of water resources are becoming more and more serious. Water quality monitoring is an extremely important technical means to protect water resources. However, the current popular water quality monitoring methods have their shortcomings, such as a low signal-to-noise ratio of satellites, poor time continuity of unmanned aerial vehicles, and frequent maintenance of in situ underwater probes. A non-contact near-surface system that can continuously monitor water quality fluctuation is urgently needed. This study proposes an automatic near-surface water quality monitoring system, which can complete the physical equipment construction, data collection, and processing of the application scenario, prove the feasibility of the self-developed equipment and methods and obtain high-performance retrieval results of four water quality parameters, namely chemical oxygen demand (COD), turbidity, ammoniacal nitrogen (NH3-N), and dissolved oxygen (DO). For each water quality parameter, fourteen machine learning algorithms were compared and evaluated with five assessment indexes. Because the ensemble learning models combine the prediction results of multiple basic learners, they have higher robustness in the prediction of water quality parameters. The optimal determination coefficients ((Formula presented.)) of COD, turbidity, NH3-N, and DO in the test dataset are 0.92, 0.98, 0.95, and 0.91, respectively. The results show the superiority of near-surface remote sensing, which has potential application value in inland, coastal, and various water bodies in the future.<br/></div> © 2022 by the authors.
Number of references:60
Main heading:Dissolved oxygen
Controlled terms:Ammonia - Antennas - Biochemical oxygen demand - Learning algorithms - Learning systems - Machine learning - Mean square error - Monitoring - Remote sensing - Signal to noise ratio - Statistical tests - Surface waters - Turbidity - Water pollution - Water quality
Uncontrolled terms:Ensemble learning - Ensemble learning model - Learning models - Machine learning algorithms - Near surfaces - Near-surface remote sensing - Remote-sensing - Water quality monitoring - Water quality parameters - Waters resources
Classification code:444.1 Surface Water - 445.2 Water Analysis - 453 Water Pollution - 716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 723.4.2 Machine Learning - 741.1 Light/Optics - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics
DOI:10.3390/rs14215305
Funding details: Number: 2019SF-254, Acronym: -, Sponsor: -;Number: XDA23040101, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020-XXX-014-01, Acronym: -, Sponsor: National Defense Science and Technology Innovation Fund of the Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Defense Science and Technology Innovation Special Zone Project under Grant 2020-XXX-014-01, in part by the Chinese Academy of Sciences Strategic Science and Technology Pilot Project A under Grant XDA23040101, and in part by the Shaanxi provincial key R&D plan project under Grant 2019SF-254.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 449>
Accession number:20224312991881
Title:Investigation of the Spectral Characteristics of Laser-Induced Plasma for Non-Flat Samples
Title of translation:非平坦样品激光诱导等离子体光谱特性研究
Authors:Lei, Bing-Ying (1, 2); Xu, Bo-Ping (1, 2); Wang, Yi-Shan (1, 2); Zhu, Xiang-Ping (1, 2); Duan, Yi-Xiang (3); Zhao, Wei (1, 2); Tang, Jie (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy Sciences, Xi’an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an; 710127, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi
Volume:42
Issue:10
Issue date:October 2022
Publication year:2022
Pages:3024-3030
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Laser-induced breakdown spectroscopy (LIBS), a fast and real-time tool for elemental analysis, has attracted great attention due to its broad applications in trace detection, geological environment monitoring, and other fields. The sample surface is one of the key environmental factors that affect the generation and characteristics of plasma. In this work, a 1 064 nm-laser beam with a pulse width of 8 ns is used to produce plasma in ambient air and comparatively investigate the emission spectra of a series of natural rock samples under non-flat and flat samples surfaces. Based on the laser-supported detonation wave model, the influence of non-flat sample surface on spectral characteristics of laser-induced plasmais discussed. For time-integrated spectra, the results show that the spectral intensities of the atomic lines of the non-flat sample are reduced by nearly 70% compared to those of the flat sample. This indicates that the negative effect of the non-flat sample surface on the LIBS cannot be ignored. According to the signal intensity of the spectral lines, Fe Ⅰ 404.58 nm and Fe Ⅰ 438.35 nm from limonite sample under different laser energies, the variation of their peak intensities and reduction factor with the change of laser energy were studied under the conditions of flat and non-flat sample surfaces. It is found that the spectral intensity under the condition of the non-flat sample surface is lower than that under the condition of the flat sample surface. It is worth noting that the reduction factor of spectral intensity first decreases gradually with laser energy, reaches the minimum value at 33 mJ, and then increases with the further increase of laser energy. Further observations show that laser-plasma with lower electron density is generated on the non-flat sample surface, and the ratio of the electron density of the non-flat sample to that of the flat sample reaches its minimum at the laser energy of 33 mJ, which is consistent with the changing trend of reduction factor with laser energy. This mainly arises because a thinner energy absorption region in laser-plasma is formed due to the large laser incident angle on the non-flat sample surface, thereby increasing the laser energy threshold corresponding to the plasma shielding. Moreover, it is found that the sample surface and the laser energy have little effect on the plasma temperature.<br/></div> © 2022 Science Press. All rights reserved.
Number of references:13
Main heading:Carrier concentration
Controlled terms:Electron density measurement - Electron temperature - Laser beams - Laser produced plasmas - Plasma interactions - Trace analysis
Uncontrolled terms:Atomic lines - Laser's energy - Laser-induced breakdown spectroscopy - Laserinduced breakdown spectroscopy (LIBS) - Non flats - Non-flat sample - Plasma temperature - Reduction factor - Sample surface - Spectral intensity
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 801 Chemistry - 932.3 Plasma Physics
Numerical data indexing:Energy 3.30E-02J, Percentage 7.00E+01%, Size 4.0458E-07m, Size 4.3835E-07m, Size 6.40E-08m, Time 8.00E-09s
DOI:10.3964/j.issn.1000-0593(2022)10-3024-07
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 450>
Accession number:20224212981511
Title:Cloud Contaminated Multispectral Remote Sensing Image Enhancement Algorithm Based on MobileNet (Open Access)
Authors:Li, Xuemei (1); Ye, Huping (2); Qiu, Shi (3)
Author affiliation:(1) School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu; 610059, China; (2) State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Ye, Huping(yehp@igsnrr.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:19
Issue date:October 2022
Publication year:2022
Article number:4815
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Multispectral remote sensing images have shown unique advantages in many fields, including military and civilian use. Facing the difficulty in processing cloud contaminated remote sensing images, this paper proposes a multispectral remote sensing image enhancement algorithm. A model is constructed from the aspects of cloud detection and image enhancement. In the cloud detection stage, clouds are divided into thick clouds and thin clouds according to the cloud transmitability in multi-spectral images, and a multi-layer cloud detection model is established. From the perspective of traditional image processing, a bimodal pre-detection algorithm is constructed to achieve thick cloud extraction. From the perspective of deep learning, the MobileNet algorithm structure is improved to achieve thin cloud extraction. Faced with the problem of insufficient training samples, a self-supervised network is constructed to achieve training, so as to meet the requirements of high precision and high efficiency cloud detection under the condition of small samples. In the image enhancement stage, the area where the ground objects are located is determined first. Then, from the perspective of compressed sensing, the signal is analyzed from the perspective of time and frequency domains. Specifically, the inter-frame information of hyperspectral images is analyzed to construct a sparse representation model based on the principle of compressed sensing. Finally, image enhancement is achieved. The experimental comparison between our algorithm and other algorithms shows that the average Area Overlap Measure (AOM) of the proposed algorithm reaches 0.83 and the Average Gradient (AG) of the proposed algorithm reaches 12.7, which is better than the other seven algorithms by average AG 2.<br/></div> © 2022 by the authors.
Number of references:69
Main heading:Remote sensing
Controlled terms:Compressed sensing - Deep learning - Extraction - Image enhancement - Military applications - Military photography - Spectroscopy
Uncontrolled terms:Average gradient - Cloud detection - Compressed-Sensing - Features fusions - Image enhancement algorithm - Multi-layers - Multi-spectral - Multispectral remote sensing image - Remote-sensing - Self-supervision
Classification code:404.1 Military Engineering - 461.4 Ergonomics and Human Factors Engineering - 716.1 Information Theory and Signal Processing - 742.1 Photography - 802.3 Chemical Operations
DOI:10.3390/rs14194815
Funding details: Number: YJKYYQ20200010, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2019YFE0126500, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 21-Y20B01-9001-19/22, Acronym: -, Sponsor: National Major Science and Technology Projects of China;
Funding text:This research was funded by the National Key Research and Development Program of China, grant number 2019YFE0126500; National Science and Technology Major Project of China’s High Resolution Earth Observation System, grant number 21-Y20B01-9001-19/22; the Scientific Instrument Developing Project of the Chinese Academy of Sciences, grant number YJKYYQ20200010.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 451>
Accession number:20223612696713
Title:Ensemble of half-space trees for hyperspectral anomaly detection
Authors:Huang, Ju (1, 2); Li, Xuelong (1, 3, 4)
Author affiliation:(1) Shaanxi Key Laboratory of Ocean Optics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi’an; 710072, China; (4) Key Laboratory of Intelligent Interaction and Applications (Northwestern Polytechnical University), Ministry of Industry and Information Technology, Xi’an; 710072, China
Corresponding author:Li, Xuelong(li@nwpu.edu.cn)
Source title:Science China Information Sciences
Abbreviated source title:Sci. China Inf. Sci.
Volume:65
Issue:9
Issue date:September 2022
Publication year:2022
Article number:192103
Language:English
ISSN:1674733X
E-ISSN:18691919
Document type:Journal article (JA)
Publisher:Science Press (China)
Abstract:<div data-language="eng" data-ev-field="abstract">Most methods for hyperspectral anomaly detection (HAD) construct profiles of background pixels and identify pixels unconformable to the profiles as anomalies. Recently, isolation forest-based algorithms were introduced into HAD, which identifies anomalies from the background without background modeling. The path length is used as a metric to estimate the anomaly degree of a pixel, but it is not flexible and straightforward. This paper introduces the half-space tree (HS-tree) method from the theory of mass estimation into HAD and proposes a metric involving mass information and tree depth to measure the anomaly degree for each pixel. More specifically, the proposed HS-tree-based detection method consists of three main steps. First, the key spectral-spatial features are extracted using the principal component analysis and the extended morphological attribute profile methods. Then, the ensemble of HS-trees are trained using different randomly selected subsamples from the feature map. Finally, each instance in the feature map traverses through each HS-tree and the anomaly scores are computed as the final detection map. Compared with conventional methods, the experimental results on four real hyperspectral datasets demonstrate the competitiveness of our method in terms of accuracy and efficiency.<br/></div> © 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:42
Main heading:Anomaly detection
Controlled terms:Geometry - Pixels - Principal component analysis - Spectroscopy
Uncontrolled terms:Anomaly degrees - Anomaly detection - Extended morphological attribute profile - Feature map - Half spaces - Half-space tree - HyperSpectral - Hyperspectral anomaly detection - Hyperspectral image - Mass estimation
Classification code:921 Mathematics - 922.2 Mathematical Statistics
DOI:10.1007/s11432-021-3310-x
Funding details: Number: 61871470, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDY-SSW-JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDY-SSW-JSC044) and National Natural Science Foundation of China (Grant No. 61871470).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 452>
Accession number:20230413449799
Title:The Earth 2.0 space mission analysis and spacecraft design
Authors:Chen, Wen (1); Chen, Kun (1); Yang, Yingquan (1); Han, Xingbo (1); Bi, Xingzi (1); He, Tao (1); Duan, Xuliang (1); Huang, Jiangjiang (1); Liang, Hong (1); Zhang, Kuoxiang (1); Wang, Haoyu (1); Liu, Liu (1); He, Junwang (1); Qin, Genjian (1); Li, Jinsong (1); Wang, Tian (1); Ge, Jian (2); Zhang, Hui (2); Zhang, Yongshuai (2); Zhou, Dan (2); Zhang, Congcong (2); Tang, Zhenghong (2); Yu, Yong (2); Zang, Weicheng (3); Mao, Shude (3); Chen, Yonghe (4); Liu, Xiaohua (4); Song, Zongxi (5); Gao, Wei (5); Zhang, Hongfei (6); Wang, Jian (6)
Author affiliation:(1) Innovation Academy for Microsatellites of CAS, No. 99 of Haike Road, Shanghai, China; (2) Shanghai Astronomical Observatory of CAS, No. 80 of Nandan Road, Shanghai, China; (3) Qsinghua University, Qsinghua Park, Beijing, China; (4) Shanghai Institute of Technical Physics of CAS, No. 500 of Yutian Road, Shanghai, China; (5) Xi'An Institute of Optics and Precision Mechanics of CAS, No.17 Xinxi Road, Xi'an, China; (6) University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, China
Corresponding author:Chen, Wen(wenchen@ustc.edu)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:1218017
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The Earth 2.0 (ET) mission is a Chinese next-generation space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and free-floating planets. To meet the scientific goals, the ET spacecraft will carry six 30 cm diameter transit telescopes with each field of view of 500 square degrees, and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees, monitor ~1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously while monitoring over 30M stars in the Galactic bulge direction. The high precision transit observations require high photometry precision and pointing stability, which is the key drive for the ET spacecraft design. In this paper, details of the overall mission modeling and analysis will be presented. The spacecraft orbit, pointing strategy, stability requirements are presented, as well as the space-ground communication analysis. The ET spacecraft adopts an ultra-high photometry precision & high stable platform, largely inherited from other space science missions. The preliminary design of spacecraft which meets mission requirements is introduced, including the spacecraft overall configuration, observation modes, avionics architecture and development plan, which pays great attention to the pointing stability and huge volume science telemetry download.<br/></div> © 2022 SPIE.
Number of references:16
Main heading:Stability
Controlled terms:Earth (planet) - Extrasolar planets - Orbits - Photometry - Spacecraft - Stars - Telescopes
Uncontrolled terms:Analysis/design - Earth 2.0 - Field of views - High photometry precision - High stability - Mission analyse - Pointing stability - Space missions - Spacecraft design - Terrestrial planets
Classification code:655.1 Spacecraft, General - 657.2 Extraterrestrial Physics and Stellar Phenomena - 941.4 Optical Variables Measurements
Numerical data indexing:Size 3.00E-01m, Size 3.50E-01m, Time 2.00E+00s
DOI:10.1117/12.2629697
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:The ET mission study is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600.The mission is currently supported by Chinese Academy of Sciences for the Phase A study and executed under the management of the National Space Science Center of CAS. After Phase A, an official mission adoption is expected around beginning of 2023. With development about four years, the ET spacecraft is targeted to be launched at the end of 2026.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 453>
Accession number:20221812050726
Title:Optical Neuromorphic Processor at 11 TeraOPs/s based on Kerr Soliton Crystal Micro-combs
Authors:Tan, Mengxi (1); Xu, Xingyuan (2); Wu, Jiayang (1); Boes, Andreas (3); Corcoran, Bill (2); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Hicks, Damien G. (1, 6); Morandotti, Roberto (7); Mitchell, Arnan (3); Moss, David J. (1)
Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC, Australia; (2) Monash University, Department of Electrical and Computer Systems Engineering, Clayton; VIC, Australia; (3) Rmit University, School of Engineering, Melbourne; VIC, Australia; (4) City University of Hong Kong, Department of Physics, Hong Kong, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of Cas, Xi'an, China; (6) Bioinformatics Division, Walter and Eliza Hall Institute of Medical Research, Parkville; VIC, Australia; (7) Matériaux et Télécommunications, INRS-Énergie, Varennes; QC, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:2022 Optical Fiber Communications Conference and Exhibition, OFC 2022 - Proceedings
Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.
Part number:1 of 1
Issue title:2022 Optical Fiber Communications Conference and Exhibition, OFC 2022 - Proceedings
Issue date:2022
Publication year:2022
Article number:Tu3G.1
Language:English
ISBN-13:9781557524669
Document type:Conference article (CA)
Conference name:2022 Optical Fiber Communications Conference and Exhibition, OFC 2022
Conference date:March 6, 2022 - March 10, 2022
Conference location:San Diego, CA, United states
Conference code:178711
Sponsor:Acphotonics; Alibaba Group; Amphenol; Anritsu; Ciena; et al.
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a universal optical vector convolutional accelerator operating at 11 Tera-OPS, generating convolutions of images of 250,000 pixels with 8-bit resolution for 10 kernels simultaneously. We use the same hardware to form a deep optical CNN with ten output neurons, achieving successful recognition of full 10 digits with 88% accuracy. Our approach is scalable and trainable for applications to unmanned vehicle and real-time video recognition.<br/></div> © 2022 OSA.
Number of references:19
Main heading:Convolution
Controlled terms:Unmanned vehicles - Optical fiber communication
Uncontrolled terms:Bit resolution - Kerr solitons - Neuromorphic - Optical CNN - Optical- - Output neurons - Real time videos - Video recognition
Classification code:716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems
Numerical data indexing:Percentage 8.80E+01%
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 454>
Accession number:20223512671446
Title:Optical Neuromorphic Processor at 11 TeraOPs/s based on Kerr Soliton Crystal Micro-combs
Authors:Tan, Mengxi (1); Xu, Xingyuan (2); Wu, Jiayang (1); Boes, Andreas (3); Corcoran, Bill (2); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Hicks, Damien G. (1, 6); Morandotti, Roberto (7); Mitchell, Arnan (3); Moss, David J. (1)
Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC, Australia; (2) Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC, Australia; (3) School of Engineering, RMIT University, Melbourne; VIC, Australia; (4) Department of Physics, City University of Hong Kong, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an, China; (6) Bioinformatics Division, Walter & Eliza Hall Institute of Medical Research, Parkville; VIC, Australia; (7) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Part number:1 of 1
Issue title:Optical Fiber Communication Conference, OFC 2022
Issue date:2022
Publication year:2022
Article number:Tu3G.1
Language:English
ISBN-13:9781557528209
Document type:Conference article (CA)
Conference name:Optical Fiber Communication Conference, OFC 2022
Conference date:March 6, 2022 - March 10, 2022
Conference location:San Diego, CA, United states
Conference code:181651
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a universal optical vector convolutional accelerator operating at 11 Tera-OPS, generating convolutions of images of 250,000 pixels with 8-bit resolution for 10 kernels simultaneously. We use the same hardware to form a deep optical CNN with ten output neurons, achieving successful recognition of full 10 digits with 88% accuracy. Our approach is scalable and trainable for applications to unmanned vehicle and real-time video recognition.<br/></div> © Optica Publishing Group 2022, © 2022 The Author(s)
Number of references:19
Main heading:Unmanned vehicles
Controlled terms:Convolution
Uncontrolled terms:Bit resolution - Kerr solitons - Neuromorphic - Optical CNN - Optical- - Output neurons - Real time videos - Video recognition
Classification code:716.1 Information Theory and Signal Processing
Numerical data indexing:Percentage 8.80E+01%
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 455>
Accession number:20220055968
Title:Double-Functionalization of Water Repellence and Anti-Reflectance by Multiple-Laser-Based Fabrication of Triple-Scale Hierarchical Surface Structures
Authors:He, Jianguo (1, 2, 3); Li, Ming (4); Dai, Shoujun (1, 2); Huang, Min (1, 3); Liu, Yang (1, 3); Li, Yang (1, 3); Fan, Lianwen (5); Yu, Jin (1, 2)
Author affiliation:(1) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing; 100094, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (5) Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing; 100094, China
Corresponding author:He, Jianguo
Source title:SSRN
Issue date:March 4, 2022
Publication year:2022
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">A novel strategy of laser ablation followed by tungsten-based pulsed laser deposition was proposed and experimentally verified for available surface functionalization with superhydrophobicity and anti-reflectance on 316L stainless steel. Three surface patterns, crater, parallel lines (PL), and grid, were manufactured by nanosecond laser ablation, while the surface morphology was controlled by the transverse traverse index. After the pulsed laser deposition treatment, tungsten particles and clusters were densely coated on the laser-ablated surfaces. The fabricated substrates were characterized by triple-scaled hierarchical structures having different patterns, corrugated structures, and broccoli-like nano-protrusions. An aging treatment was performed to improve wettability. The results verified that the proposed multiple laser treatments in combination with the aging treatment allow the quick implementation of superhydrophobicity while maintaining good reflectance over the spectral range. Moreover, the topology was characterized using an optical profiler and through scanning electron microscopy, while a video-based optical contact angle measuring device and spectrophotometer were used to measure the contact angle and optical reflectance, respectively. X-ray photoelectron spectroscopy was performed to analyze the chemical components. This method can prepare water-repellent anti-reflectance hybrid substrates for industrial and academic applications.<br/></div> © 2022, The Authors. All rights reserved.
Number of references:36
Main heading:Contact angle
Controlled terms:Austenitic stainless steel - Chemical analysis - Fabrication - Hydrophobicity - Laser ablation - Morphology - Pulsed laser deposition - Pulsed lasers - Reflection - Scanning electron microscopy - Surface morphology - X ray photoelectron spectroscopy
Uncontrolled terms:316 L stainless steel - Ageing treatments - Anti-reflectance - Functionalizations - Laser-based fabrication - Multiple lasers - Nanosecond laser ablation - Pulsed-laser deposition - Superhydrophobicity - Water repellence
Classification code:545.3 Steel - 641.2 Heat Transfer - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 744.9 Laser Applications - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Numerical data indexing:Volume 3.16E-01m3
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4049620
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
<RECORD 456>
Accession number:20231113742249
Title:A Unified Perspective of Multi-level Cross-Modal Similarity for Cross-Modal Retrieval
Authors:Huang, Yingying (1); Wang, Quan (2); Zhang, Yipeng (1); Hu, Bingliang (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology Cas, Xi an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Key Laboratory of Biomedical Spectroscopy of Xi an, Xian, China; (2) Key Laboratory of Spectral Imaging Technology Cas, Xi an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Biomedical Spectroscopy of Xi an, Xian, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi an, Xian, China
Source title:2022 5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Abbreviated source title:Int. Conf. Inf. Commun. Signal Process., ICICSP
Part number:1 of 1
Issue title:2022 5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Issue date:2022
Publication year:2022
Pages:466-471
Language:English
ISBN-13:9781665485890
Document type:Conference article (CA)
Conference name:5th International Conference on Information Communication and Signal Processing, ICICSP 2022
Conference date:November 26, 2022 - November 28, 2022
Conference location:Shenzhen, China
Conference code:187041
Sponsor:IEEE; Shenzhen University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Cross-modal retrieval is an intelligent understanding task between cross-modal data, and it comes with challenges to measure the similarity between cross-modal data. Existing methods mainly learned a common space by feature-wise or label-based supervised learning. Still, feature-wise methods only focused on the interactions between pairs of cross-modal data and label-based supervised learning relied excessively on classification accuracy. In the same space, these methods cannot capture more comprehensive interaction between cross-mode data, that is, given a query, this query and the retrieved data exist one-to-many correspondence, and the similarity between the pair-wise data is the largest. Therefore, a unified perspective of multi-level cross-modal similarity (MCMS) is proposed for cross-modal retrieval. Core ideas of MCMS are as follows: 1) The local similarity between cross-modal data is integrated to enrich the fine-grained cross-modal information. 2) The similarity between common feature vector and label is designed to obtain one-to-many correspondences between cross-modal data. In addition, Normalize Discounted Cumulative Gain (NDCG) as the evaluation metric is first used to comprehensively evaluate the results of cross-modal retrieval. Extensive experiments demonstrate that MCMS has better performance in cross-modal retrieval tasks.<br/></div> © 2022 IEEE.
Number of references:27
Main heading:Supervised learning
Controlled terms:Learning systems - Modal analysis
Uncontrolled terms:Common spaces - Cross-modal - Cross-modal retrieval - Fine grained - Fine-grained cross-modal information - Modal data - Multilevels - One-to-many correspondence - Unified perspective
Classification code:921 Mathematics
DOI:10.1109/ICICSP55539.2022.10050678
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 457>
Accession number:20220211440017
Title:STRASS Dehazing: Spatio-Temporal Retinex-Inspired Dehazing by an Averaging of Stochastic Samples (Open Access)
Authors:Yu, Zhe (1); Sun, Bangyong (1, 3); Liu, Di (2); de Dravo, Vincent Whannou (1); Khokhlova, Margarita (4); Wu, Siyuan (3)
Author affiliation:(1) School of Printing Packaging Engineering and Digital Media, Xi’an University of Technology, Xi’an; 710048, China; (2) Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing; 100048, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) LASTIG, Université Gustave Eiffel, Écully; 69134, France
Corresponding author:Sun, Bangyong(sunbangyong@xaut.edu.cn)
Source title:Journal of Renewable Materials
Abbreviated source title:J. Renew. Mater.
Volume:10
Issue:5
Issue date:2022
Publication year:2022
Pages:1381-1395
Language:English
ISSN:21646325
E-ISSN:21646341
Document type:Journal article (JA)
Publisher:Tech Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we propose a neoteric and high-efficiency single image dehazing algorithm via contrast enhancement which is called STRASS (Spatio-Temporal Retinex-Inspired by an Averaging of Stochastic Samples) dehazing, it is realized by constructing an efficient high-pass filter to process haze images and taking the influence of human vision system into account in image dehazing principles. The novel high-pass filter works by getting each pixel using RSR and computes the average of the samples. Then the low-pass filter resulting from the minimum envelope in STRESS framework has been replaced by the average of the samples. The final dehazed image is yielded after iterations of the high-pass filter. STRASS can be run directly without any machine learning. Extensive experimental results on datasets prove that STRASS surpass the state-of-the-arts. Image dehazing can be applied in the field of printing and packaging, our method is of great significance for image pre-processing before printing.<br/></div> © 2022, Tech Science Press. All rights reserved.
Number of references:42
Main heading:Image reconstruction
Controlled terms:Low pass filters - Demulsification - High pass filters - Stochastic systems - Image enhancement
Uncontrolled terms:Contrast Enhancement - Dehazing - High-pass filter - Higher efficiency - Image dehazing - Images reconstruction - Retinex - Single image dehazing - Spatio-temporal - Stochastics
Classification code:703.2 Electric Filters - 731.1 Control Systems - 802.3 Chemical Operations - 961 Systems Science
DOI:10.32604/jrm.2022.018262
Funding details: Number: LSIT201801D, Acronym: -, Sponsor: -;Number: 2021GY-027, Acronym: -, Sponsor: -;Number: BTBD-2020KF08, Acronym: -, Sponsor: -;Number: 62076199, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019M653784, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: BTBU, Sponsor: Beijing Technology and Business University;
Funding text:Funding Statement: This work was supported in part by National Natural Science Foundation of China under Grant 62076199, in part by the Open Research Fund of Beijing Key Laboratory of Big Data Technology for Food Safety under Grant BTBD-2020KF08, Beijing Technology and Business University, in part by the China Postdoctoral Science Foundation under Grant 2019M653784, in part by Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences under Grant LSIT201801D, in part by the Key R&D Project of Shaan’xi Province under Grant 2021GY-027.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
<RECORD 458>
Accession number:20223712720653
Title:Generation of scalar/vectorial vortex beams by using the plasmonic metasurfaces
Authors:Zhang, Xiaodong (1, 2, 3); Kong, Depeng (4); Zhao, Yu (1); Ma, Ningtao (1)
Author affiliation:(1) School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou; 450002, China; (2) Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou; 450002, China; (3) Zhengzhou Key Laboratory of Information Optics and Photoelectric Technology, Zhengzhou University of Light Industry, Zhengzhou; 450002, China; (4) State Key Laboratory of Transient and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Zhang, Xiaodong(zhangxiaodong@zzuli.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:25
Issue date:September 1, 2022
Publication year:2022
Pages:7336-7342
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Scalar and vector vortex beams are characterized of a helical wavefront but different polarized states, which result in different applications. In this paper, we design and fabricate a plasmonic metasurface based on the geometric phase principle. The designed metasurfaces are capable of generating a scalar vortex beam with a topological charge of ±2 and a vectorial vortex beam with a topological charge of ±1 in the near-infrared band. The experimental results are in good agreement with the simulation results, and our work provides a new idea for the development of a multivortex beam converter.<br/></div> © 2022 Optica Publishing Group.
Number of references:35
Main heading:Plasmonics
Controlled terms:Infrared devices - Topology - Vortex flow
Uncontrolled terms:Geometric phase - Metasurface - Near infrared band - Plasmonics - Polarized state - Topological charges - Vector-vortex beams - Vortex beams
Classification code:631.1 Fluid Flow, General - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 932.3 Plasma Physics
Numerical data indexing:Size 2.54E-02m
DOI:10.1364/AO.463459
Funding details: Number: 61905221, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020BSJJ060, Acronym: ZZULI, Sponsor: Zhengzhou University of Light Industry;Number: 22B140007, Acronym: -, Sponsor: Key Scientific Research Project of Colleges and Universities in Henan Province;
Funding text:Funding. The Doctoral Scientific Fund Project of Zhengzhou University of Light Industry (2020BSJJ060); Key Scientific Research Project of Colleges and Universities in Henan Province (22B140007); National Natural Science Foundation of China (61905221).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 459>
Accession number:20220511544163
Title:Bovine Serum Albumin Detection by Graphene Oxide Coated Long-Period Fiber Grating (Open Access)
Authors:Wang, Ruiduo (1, 2); Wu, Hao (1); Qi, Mei (3); Han, Jing (1); Ren, Zhaoyu (1)
Author affiliation:(1) The State Key Laboratory of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics & Photon Technology, Northwest University, Xi’an; 710127, China; (2) The State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) The School of Information Science and Technology, Northwest University, Xi’an; 710127, China
Corresponding authors:Ren, Zhaoyu(rzy@nwu.edu.cn); Qi, Mei(qm@nwu.edu.cn)
Source title:Photonic Sensors
Abbreviated source title:Photonic Sens.
Volume:12
Issue:3
Issue date:September 2022
Publication year:2022
Article number:220305
Language:English
ISSN:16749251
E-ISSN:21907439
Document type:Journal article (JA)
Publisher:Springer Verlag
Abstract:<div data-language="eng" data-ev-field="abstract">A biosensor for bovine serum albumin (BSA) detection by graphene oxide (GO) functionalized micro-taped long-period fiber grating (GMLPG) was demonstrated. The amide bond connected between the GO and BSA enabled the BSA to attach onto the fiber surface, which changed the effective refractive index of the cladding mode and characterized the concentration of the BSA. This real-time monitoring system demonstrated a sensing sensitivity of 1.263 nm/(mg/mL) and a detection limit of 0.043 mg/mL. Moreover, it illustrated superior measurement performance of higher sensitivity in the presence of glucose and urea as the interference, which showed static sensitivities of ∼1.476 nm/(mg/mL) and 1.504 nm/(mg/mL), respectively. The proposed GMLPG demonstrated a great potential for being employed as a sensor for biomedical and biochemical applications.<br/></div> © 2022, The Author(s).
Number of references:36
Main heading:Urea
Controlled terms:Amides - Biosensors - Refractive index - Graphene oxide - Signal to noise ratio - Diffraction gratings - Mammals
Uncontrolled terms:Amide bond - Bovine serum albumins - Cladding modes - Detection limits - Effective refractive index - Fibre surfaces - Functionalized - Graphene oxides - Long-period fibre gratings - Real time monitoring system
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.1 Organic Compounds - 951 Materials Science
Numerical data indexing:Mass density 4.30E-05kg/m3, Size 1.263E-09m, Size 1.476E-09m, Size 1.504E-09m
DOI:10.1007/s13320-022-0649-6
Funding details: Number: 2018JM1059, Acronym: -, Sponsor: -;Number: 11874299, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the International Cooperative Program (Grant No. 2014DFR10780), the National Science Foundation of China (Grant No. 11874299), and the Science and Technology Innovation and Entrepreneurship Double Tutor Project of Shaanxi Province (Grant No. 2018JM1059). The authors would like to thank Professor Zhengquan HE for his support in experimental conditions.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 460>
Accession number:20221511943473
Title:Experimental Study on Bottom-Up Detection of Underwater Targets Based on Polarization Imaging (Open Access)
Authors:Pan, Tianfeng (1, 2); He, Xianqiang (1, 2, 3); Zhang, Xuan (2); Liu, Jia (2, 4); Bai, Yan (2, 3); Gong, Fang (2); Li, Teng (2, 3)
Author affiliation:(1) Ocean College, Zhejiang University, Zhoushan; 316021, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou; 310012, China; (3) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou; 511458, China; (4) Laboratory of Remote Sensing and Intelligent Information System, Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)
Source title:Sensors
Abbreviated source title:Sensors
Volume:22
Issue:8
Issue date:April-2 2022
Publication year:2022
Article number:2827
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Previous studies on the polarization imaging of underwater targets mainly focused on top-down detection; however, the capacities of bottom-up detection were poorly known. Based on in situ experiments, the capability of bottom-up detection of underwater targets using polarization imaging was investigated. First, to realize the objective of bottom-up polarization imaging, a SALSA polarization camera was integrated into our Underwater Polarization Imaging System (UPIS), which was integrated with an attitude sensor. At Qiandao Lake, where the water is relatively clear, experiments were conducted to examine the capacity of the UPIS to detect objects from the bottom up. Simultaneously, entropy, clarity, and contrast were adopted to compare the imaging performance with different radiation parameters. The results show that among all the used imaging parameters, the angle of polarization is the optimal parameter for bottom-up detection of underwater targets based on polarization imaging, which may result from the different diffused reflectance of the target surface to the linear polarization components of the Stokes vector.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:32
Main heading:Polarization
Controlled terms:Object detection - Underwater imaging - Imaging systems
Uncontrolled terms:Angle of polarization - Bottom up - Bottom-up observation - In-situ experiments - Polarization imaging - Polarization parameters - Topdown - Underwater polarization imaging - Underwater target
Classification code:723.2 Data Processing and Image Processing - 746 Imaging Techniques
DOI:10.3390/s22082827
Funding details: Number: GML2019ZD0602, Acronym: -, Sponsor: -;Number: LR18D060001, Acronym: -, Sponsor: -;Number: 41825014,42176177, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017R52001, Acronym: ZJNSF, Sponsor: Natural Science Foundation of Zhejiang Province;
Funding text:Funding: This research was funded by the National Natural Science Foundation of China (Grants #41825014 and #42176177), the Key Special Project for Introduced Talents Team of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0602), the Zhejiang Provincial Natural Science Foundation of China (2017R52001), the Zhejiang Talent Program (LR18D060001).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 461>
Accession number:20220811671317
Title:A High-Sensitivity Vacuum Diode Temperature Sensor Based on Barrier-Lowering Effect (Open Access)
Authors:Shen, Zhihua (1); Wang, Xiao (2); Li, Qiaoning (1); Ge, Bin (1); Jiang, Linlin (1); Tian, Jinshou (3); Wu, Shengli (4)
Author affiliation:(1) School of Electronics and Information Engineering, Nantong Vocational University, Nantong; 226007, China; (2) School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an; 710049, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (4) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi’an Jiaotong University, Xi’an; 710049, China
Corresponding authors:Shen, Zhihua(shenzh@mail.ntvu.edu.cn); Wu, Shengli(slwu@mail.xjtu.edu.cn)
Source title:Micromachines
Abbreviated source title:Micromachines
Volume:13
Issue:2
Issue date:February 2022
Publication year:2022
Article number:286
Language:English
E-ISSN:2072666X
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">A new kind of temperature sensor based on a vacuum diode was proposed and numerically studied in this paper. This device operated under different electron emission mechanisms according to the electron density in the vacuum channel. The temperature determination ability of this device was only empowered when working in the electric-field-assisted thermionic emission regime (barrier-lowering effect). The simulated results indicated that the temperature-sensing range of this device was around 273 K–325 K with a supply current of 1 μA. To obtain a linear dependency of voltage on temperature, we designed a proportional-to-absolute-temperature (PTAT) circuit. The mathematic derivation of the PTAT voltage is presented in this study. The temperature-sensing sensitivity was calculated as 7.6 mV/K according to the measured I-U (current versus voltage) characteristic. The structure and principle of the device presented in this paper might provide an alternative method for the study of temperature sensors.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:28
Main heading:Electric fields
Controlled terms:Thermionic emission - Diodes - Temperature sensors
Uncontrolled terms:Barrier lowering - Electric field assisted thermionic emission - Electron emission mechanism - High sensitivity - Sensing ranges - Simulated results - Temperature determination - Temperature sensing - Vacuum channels - Vacuum diodes
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 944.5 Temperature Measuring Instruments
Numerical data indexing:Electric current 1.00E-06A, Temperature 2.73E+02K to 3.25E+02K, Voltage 7.60E-03V
DOI:10.3390/mi13020286
Funding details: Number: 62004108, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 62004120, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was funded by the National Natural Science Foundation of China, grant number 62004108, 62004120; Natural Science Foundation for Universities of Jiangsu Province, grant number 20KJD510001, 20KJB470019; and Nantong Science and Technology Plan Project, grant number JC2021036.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 462>
Accession number:20225013237309
Title:Velocity history measurement of hypersonic tunnel driver based on photon Doppler velocimeter (Open Access)
Title of translation:基于光子多普勒技术的高超风洞驱动器速度历程测量 (Open Access)
Authors:Hao, Ge-Yang (1, 4); Yang, Yu-Cheng (1, 4); Zhao, Rong-Juan (2); Lü, Xiao-Peng (1); Yang, Ya-Han (3); Wu, Guo-Jun (1, 3)
Author affiliation:(1) Shaanxi Key Laboratory of Ocean Optics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang; 621000, China; (3) Joint Laboratory of Ocean Observation and Detection, Xi’an Institute of Optics and Precision Mechanics, Pilot National Laboratory for Marine Science and Technology, Qingdao; 266200, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wu, Guo-Jun(wuguojun@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:23
Issue date:December 5, 2022
Publication year:2022
Article number:234208
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">The research of hypersonic process is limited by the transition model, the turbulence model, and the computational complexity. At present the tunnel test is still a better way to investigate the hypersonic process than the computational fluid dynamic (CFD) method. In this work, the principle and structure of all-fiber photon Doppler velocimeter (PDV) are introduced. The PDV is based on laser Doppler effect and consists of an all-fiber Mach Zehnder interferometer and an optical antenna. The measurement accuracy and distance of PDV are tested, showing that the error can be controlled to be within 0.17 m/s when the velocity of piston is below 40 m/s. At the same time, the measured distance of PDV can reach 26.3 m. The continuous velocity of the free piston is measured by using the PDV in high enthalpy expansion tunnel of China aerodynamics research and development center (CARDC). During the tunnel tests, the PDV is placed next to the tunnel, and the optical antenna is installed behind the observation window of the tunnel and connected to a circulator by optical fiber. When the driving pressure of the tunnel is 1.3 MPa, the maximum numerical simulation velocity of the piston is 88.981 m/s, and the velocity is measured to be 88.810 m/s with a relative deviation of –0.19%; when the driving pressure of the tunnel is 2.7 MPa, the maximum numerical simulation velocity of the piston is 125.100 m/s, the measured velocity is 123.843 m/s, and the relative deviation is –1.00%. The piston reaches a maximum velocity before impacting on the tunnel, and then decelerates rapidly under the joint action of the driving pressure and compression wave. Therefore, the soft landing of the piston proves feasible, which is put forward by Stallkerin the 1960s. Finally, the reasons why PDV missed the impact velocity of piston is discussed. Through the analysis of received intensity, it is believed that the absorption, scattering and expansion of the laser beam caused by the strong driving pressure is the main reason.<br/></div> © 2022 Chinese Physical Society.
Number of references:17
Main heading:Photons
Controlled terms:Aerodynamics - Antennas - Doppler effect - Enthalpy - Laser beams - Numerical models - Optical fibers - Pistons - Turbulence models - Velocity measurement
Uncontrolled terms:All fiber - Doppler velocimeter - High enthalpy expansion tunnel - Measurements of - Optical antennas - Photon dopple velocimeter - Piston velocity - Relative deviations - Transition model - Tunnel test
Classification code:612.1.1 Internal Combustion Engine Components - 641.1 Thermodynamics - 651.1 Aerodynamics, General - 741.1.2 Fiber Optics - 744.8 Laser Beam Interactions - 921 Mathematics - 931.3 Atomic and Molecular Physics - 943.3 Special Purpose Instruments
Numerical data indexing:Percentage 1.00E00%, Percentage 1.90E-01%, Pressure 1.30E+06Pa, Pressure 2.70E+06Pa, Size 2.63E+01m, Velocity 1.23843E+02m/s, Velocity 1.251E+02m/s, Velocity 1.70E-01m/s, Velocity 4.00E+01m/s, Velocity 8.881E+01m/s, Velocity 8.8981E+01m/s
DOI:10.7498/aps.71.20221234
Funding details: Number: XDA22030201, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:* Project supported by the Strategic Priority Research Program (A) of Chinese Academy of Sciences, China (Grant No. XDA22030201) and the Youth Innovation Promotion Association of Xi’ an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China. † Corresponding author. E-mail: wuguojun@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 463>
Accession number:20223112454145
Title:User-friendly, reconfigurable all-optical signal processing with integrated photonics (Open Access)
Authors:Fischer, Bennet (1); Chemnitz, Mario (1); Wetzel, Benjamin (2); Roztocki, Piotr (1); MacLellan, Benjamin (1); Reimer, Christian (3); Little, Brent (4); Chu, Sai (5); Viktorov, Evgeny (6); Moss, David (7); Kues, Michael (8); Azana, Jose (1); Pasquazi, Alessia (9); Peccianti, Marco (9); Morandotti, Roberto (1)
Author affiliation:(1) Université du Québec, Institut National de la Recerche Scientifique, Varennes; QC; J3X 1P7, Canada; (2) Université de Limoges, Xlim Research Institute, Limoges; 87060, France; (3) HyperLight Corporation, Massachusetts; 02139, United States; (4) Chinese Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (5) City University of Hong Kong, Kowloon, Hong Kong, Hong Kong; (6) Itmo University, St. Petersburg, Russia; (7) Swineburne University of Technology, Optical Sciences Centre, Hawthorn; VIC, Australia; (8) Leibniz University Hannover, Hannover Center for Optical Technologies, Hannover; 30167, Germany; (9) University of Sussex, Emergent Photonics Lab (EPIC), Department of Physics and Astronomy, Brighton; BN1 9QH, United Kingdom
Corresponding author:Morandotti, Roberto
Source title:2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting, AT-AP-RASC 2022
Abbreviated source title:URSI Atl. Asia Pac. Radio Sci. Meet., AT-AP-RASC
Part number:1 of 1
Issue title:2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting, AT-AP-RASC 2022
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9789463968058
Document type:Conference article (CA)
Conference name:3rd URSI Atlantic and Asia Pacific Radio Science Meeting, AT-AP-RASC 2022
Conference date:May 30, 2022 - June 4, 2022
Conference location:Gran Canaria, Spain
Conference code:180697
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The development of reconfigurable, integrated all-optical signal processors on will enable low-cost and accessible platforms for key technologies such as bio-medical imaging, telecommunications and quantum optics. We demon-strate, that simple, user-friendly, programmable integrated circuits in combination with evolutionary optimization al-gorithms can constitute an essential pillar in the field of smart-photonics.<br/></div> © 2022 URSI.
Number of references:12
Main heading:Medical imaging
Controlled terms:Optical signal processing - Optimization - Photonics - Quantum optics
Uncontrolled terms:All optical - All-optical signal processing - Bio-medical - Integrated photonics - Key technologies - Low-costs - Optical signals - Reconfigurable - Signal processor - User friendly
Classification code:461.1 Biomedical Engineering - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 921.5 Optimization Techniques - 931.4 Quantum Theory; Quantum Mechanics
DOI:10.23919/AT-AP-RASC54737.2022.9814194
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 464>
Accession number:20213910942722
Title:Simultaneous retrieval of aerosol size and composition by multi-angle polarization scattering measurements
Authors:Guo, Wei (1, 2); Zeng, Nan (1); Liao, Riwei (3); Xu, Qizhi (1, 2); Guo, Jun (1); He, Yonghong (1, 2); Di, Huige (4); Hua, Dengxin (4); Ma, Hui (1, 5)
Author affiliation:(1) Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen; 518055, China; (2) Department of Biomedical Engineering, Tsinghua University, Beijing; 100084, China; (3) Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou; 350007, China; (4) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (5) Center for Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen; 518071, China
Corresponding author:Zeng, Nan(zengnan@sz.tsinghua.edu.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:149
Issue date:February 2022
Publication year:2022
Article number:106799
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Changes of polarization state in aerosol scattering processes are sensitive to various microphysical properties of particles, such as size distribution and complex refractive index. In this work, we present a method to estimate the complex refractive indices (ACRI) and particle size distribution (PSD) of aerosols based on the measured polarization scattering signals using our multi-angle Stokes vector analysis system of individual particles. Then we use the probability density function (PDF) of aerosols to weight the Stokes vector and compare it with Mie scattering theory to iteratively retrieve the optimal ACRI and PSD. The experimental results of six kinds of aerosol samples support the validity and feasibility of our method, implying the important potential of polarization scattering information extraction applied in dynamic monitoring, quantitative retrieval and fine identification of aerosols.<br/></div> © 2021
Number of references:31
Main heading:Aerosols
Controlled terms:Density functional theory - Iterative methods - Refractive index - Size distribution - Particle size analysis - Probability density function - Particle size - Polarization
Uncontrolled terms:Aerosol composition - Aerosol retrieval - Complex refractive index - Multi angle - Particle scattering - Particles-size distributions - Polarization scattering - Single particle scattering - Single-particle - Stokes vector
Classification code:741.1 Light/Optics - 921.6 Numerical Methods - 922.1 Probability Theory - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 951 Materials Science
DOI:10.1016/j.optlaseng.2021.106799
Funding details: Number: 2020YFF01014500ZL, Acronym: -, Sponsor: -;Number: JCYJ20200109142820687, Acronym: -, Sponsor: -;
Funding text:This work has been supported by National Key Program of Science and Technology Supporting Economy of China (2020YFF01014500ZL); Science and Technology Research Program of Shenzhen Grant (JCYJ20200109142820687).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 465>
Accession number:20221511953938
Title:Extreme learning machine and genetic algorithm in quantitative analysis of sulfur hexafluoride by infrared spectroscopy
Authors:Liu, Huan (1, 2, 3); Zhu, Jun (4); Yin, Huan (4); Yan, Qiangqiang (1, 2); Liu, Hong (1, 2); Guan, Shouxin (1, 2, 3); Cai, Qisheng (5); Sun, Jiawen (6); Yao, Shun (4); Wei, Ruyi (1, 2, 3, 7)
Author affiliation:(1) CAS Key Laboratory of Spectral Imaging Technology, Xi’an; 710119, China; (2) Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) DFH Satellite Co., Ltd., Beijing; 100094, China; (5) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (6) Qingdao Guoke Hongcheng Optoelectronic Technology Co., Ltd., Qingdao; 266114, China; (7) Electronic Information School, Wuhan University, Wuhan; 430072, China
Corresponding author:Wei, Ruyi(ruyiwei@whu.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:61
Issue:10
Issue date:April 1, 2022
Publication year:2022
Pages:2834-2841
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Owing to the general disadvantages of traditional neural networks in gas concentration inversion, such as slow training speed, sensitive learning rate selection, unstable solutions, weak generalization ability, and an ability to easily fall into local minimum points, the extreme learning machine (ELM) was applied to sulfur hexafluoride (SF<inf>6</inf>) concentration inversion research. To solve the problems of high dimensionality, collinearity, and noise of the spectral data input to the ELM network, a genetic algorithm was used to obtain fewer but critical spectral data. This was used as an input variable to achieve a genetic algorithm joint extreme learning machine (GA-ELM) whose performance was compared with the genetic algorithm joint backpropagation (GA-BP) neural network algorithm to verify its effectiveness. The experiment used 60 groups of SF<inf>6</inf> gas samples with different concentrations, made via a self-developed Fourier transform infrared spectroscopy instrument. The SF<inf>6</inf> gas samples were placed in an open optical path to obtain infrared interference signals, and then spectral restoration was performed. Fifty groups were randomly selected as training samples, and 10 groups were used as test samples. The BP neural network and ELM algorithms were used to invert the SF<inf>6</inf> gas concentration of the mixed absorbance spectrum, and the results of the two algorithms were compared. The sample mean square error decreased from 248.6917 to 63.0359; the coefficient of determination increased from 0.9941 to 0.9984; and the single running time decreased from 0.0773 to 0.0042 s. Comparing the optimized GA-ELM algorithm with traditional algorithms such as ELM and partial least squares, the GA-ELM algorithm had higher prediction accuracy and operating efficiency and better stability and generalization performance in the quantitative analysis of small samples of gas under complex noise backgrounds.<br/></div> © 2022 OSA - The Optical Society. All rights reserved.
Number of references:21
Main heading:Genetic algorithms
Controlled terms:Knowledge acquisition - Learning algorithms - Machine learning - Least squares approximations - Spectrum analysis - Fourier transform infrared spectroscopy - Neural networks - Sulfur hexafluoride - SF6 insulation - Gases - Mean square error
Uncontrolled terms:Gas concentration - Gas samples - Infrared: spectroscopy - Learning rates - Machine algorithm - Neural-networks - SF 6 gas - Spectral data - Training speed - Unstable solutions
Classification code:413.1 Electric Insulating Materials - 723.4 Artificial Intelligence - 723.4.2 Machine Learning - 801 Chemistry - 804.2 Inorganic Compounds - 921.6 Numerical Methods - 922.2 Mathematical Statistics
Numerical data indexing:Time 7.73E-02s to 4.20E-03s
DOI:10.1364/AO.450805
Funding details: Number: 11727806, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (11727806).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 466>
Accession number:20220611597174
Title:Snapshot compressive spectral - depth imaging based on light field (Open Access)
Authors:Ding, Xiaoming (1, 2); Yan, QiangQiang (2); Hu, Liang (3); Zhou, Shubo (4); Wei, Ruyi (2, 5); Wang, Xiaocheng (1); Li, Yupeng (1)
Author affiliation:(1) Tianjin Key Laboratory of Wireless Mobile Communications and Power Transmission, Tianjin Normal University, Tianjin; 300387, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Xi’an; 710119, China; (3) CAS Key Laboratory of Computational Optics Imaging Technology, Aerospace – Information Research Institution, Beijing; 100094, China; (4) Institute of Information Science and Technology, Donghua University, Shanghai; 201620, China; (5) Electronic Information School, Wuhan University, Wuhan; 430072, China
Corresponding author:Ding, Xiaoming(xmding@tjnu.edu.cn)
Source title:Eurasip Journal on Advances in Signal Processing
Abbreviated source title:Eurasip. J. Adv. Sign. Process.
Volume:2022
Issue:1
Issue date:December 2022
Publication year:2022
Article number:6
Language:English
ISSN:16876172
E-ISSN:16876180
Document type:Journal article (JA)
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">This paper proposes a snapshot Compressed Light Field Imaging Spectrometer based on compressed sensing and light field concept, which can acquire the two-dimensional spatial distribution, depth estimation and spectral intensity of input scenes simultaneously. The primary structure of the system contains fore optics, coded aperture, dispersion element and light field sensor. The detected data can record the coded mixture spatial-spectral information of the input scene with direction information of light rays. The datacube containing depth estimation can be recovered with the compressed sensing and digital refocus framework. We establish the mathematical model of the system and conduct simulations for verification. The reconstruction strategy is demonstrated for the simulation data.<br/></div> © 2022, The Author(s).
Number of references:34
Main heading:Compressed sensing
Controlled terms:Light - Estimation - Spectroscopy
Uncontrolled terms:Compressed-Sensing - Depth Estimation - Depth imaging - Field imaging - Imaging spectrometers - Light fields - Multidimensional imaging - Sensing fields - Spectral imaging - Two-dimensional
Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 921 Mathematics
DOI:10.1186/s13634-022-00834-x
Funding details: Number: LSIT202004W, Acronym: -, Sponsor: -;Number: 52XB2004,52XB2005, Acronym: -, Sponsor: -;Number: 2021KJ182, Acronym: -, Sponsor: -;Number: 61803372,61901301,62001327,62001328, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-323, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was supported by the Scientific Research Project of Tianjin Educational Committee (2021KJ182), National Natural Science Foundation of China (NSFC) (62001328, 61803372, 62001327, 61901301), Doctoral Foundation of Tianjin Normal University (52XB2004, 52XB2005), Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (No. LSIT202004W) and Natural Science Foundation of Shaanxi Province (2021JQ-323).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 467>
Accession number:20224613106808
Title:An Investigation of the Fengyun-4A/B GIIRS Performance on Temperature and Humidity Retrievals (Open Access)
Authors:Wang, Sufeng (1, 2); Lu, Feng (3); Feng, Yutao (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Center for Space Weather), Innovation Center for Feng Yun Meteorological Satellite (FYSIC), China Meteorological Administrations, Beijing; 100049, China
Corresponding author:Lu, Feng(lufeng@cma.gov.cn)
Source title:Atmosphere
Abbreviated source title:Atmosphere
Volume:13
Issue:11
Issue date:November 2022
Publication year:2022
Article number:1830
Language:English
E-ISSN:20734433
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The Fengyun-4A/B (FY-4A/B) geostationary satellite carries the Geostationary Interferometric Infrared Sounder (GIIRS). The instrument parameters of the GIIRS on FY-4A and FY-4B are not exactly the same, which is crucial for the atmospheric temperature and humidity measurements. The objective of this paper is to discuss the influence of spectral range on the retrieval for the FY-4A/B GIIRS. Firstly, we performed channel selection to choose the appropriate channels for retrieval. Then, the multiple cycling utilization of the physical retrieval method is proposed and conducted for improving the accuracy, and the retrieval results of FY-4A/B GIIRS are compared. Finally, perturbation analysis is performed to discuss the sensitivity of the retrieval to temperature perturbations due to the difference in spectral range between the two GIIRS. The results show the retrieval method can realize the improvement of the average accuracy by more than 0.9 K for temperature and 3.0% for humidity. As the spectral range widens, the retrieval accuracy of FY-4B GIIRS is superior to that of FY-4A GIIRS from 130 hPa to 400 hPa. Furthermore, perturbation analysis also shows the extension of the spectral range is beneficial to the retrieval. This study could offer the usefulness of current GIIRS instruments with observed on-orbit bias, and a reference for the parameter design of the subsequent instruments.<br/></div> © 2022 by the authors.
Number of references:49
Main heading:Geostationary satellites
Controlled terms:Atmospheric humidity - Atmospheric temperature - Information retrieval - Infrared devices - Orbits
Uncontrolled terms:Fengyun-4a/B geostationary interferometric infrared sound - Humidity measurements - Infrared sounders - Instrument parameter - Interferometrics - Performance - Perturbation Analysis - Retrieval - Spectral range - Temperature and humidities
Classification code:443.1 Atmospheric Properties - 655.2 Satellites - 903.3 Information Retrieval and Use
Numerical data indexing:Electric current -4.00E+00A, Percentage 3.00E+00%, Pressure 1.30E+04Pa to 4.00E+04Pa, Temperature 9.00E-01K
DOI:10.3390/atmos13111830
Funding details: Number: 41965001,61527805, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was funded by the National Natural Science Foundation of China (Grant No. 61527805) and by the National Natural Science Foundation of China (Grant No. 41965001).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 468>
Accession number:20223012412633
Title:Atmospheric diffuse transmittance of the linear polarization component of water-leaving radiation (Open Access)
Authors:Pan, Tianfeng (1, 2); He, Xianqiang (1, 2, 3); Bai, Yan (2, 3); Liu, Jia (2, 4, 5); Zhu, Qiankun (2, 3); Gong, Fang (2); Li, Teng (2, 3); Jin, Xuchen (2, 3)
Author affiliation:(1) Ocean College, Zhejiang University, Zhoushan; 316021, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou; 310012, China; (3) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou; 511458, China; (4) Key Laboratory of Spectral Imaging Technology of CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:15
Issue date:July 18, 2022
Publication year:2022
Pages:27196-27213
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The polarization characteristics of water-leaving radiation contain rich information on oceanic constituents. Determining the atmospheric diffuse transmittance is crucial for extracting the polarization information of water-leaving radiation from the radiation acquired by polarimetry satellites at the top of the atmosphere. However, there is still a lack of understanding of the atmospheric diffuse transmittance of the linear polarization component of water-leaving radiation. Here, we first evaluated the difference between the atmospheric diffuse transmittance of the linear polarization component (T<inf>Q</inf>, T<inf>U</inf>) and the intensity component (T<inf>I</inf>) of the water-leaving radiation based on the Ocean Successive Orders with Atmosphere Advanced radiative transfer model. As a consequence, there were apparent differences between T<inf>Q</inf>, T<inf>U</inf> and T<inf>I</inf>. In the case of a large solar zenith angle and a large viewing zenith angle, the difference between T<inf>Q</inf>, T<inf>U</inf> and T<inf>I</inf> will exceed 1. Meanwhile, compared with T<inf>I</inf>, the oceanic constituents had a prominent interference with T<inf>Q</inf> and T<inf>U</inf>, and the sediment concentration had little interference with T<inf>Q</inf> and T<inf>U</inf> in low- and medium-turbidity water with respect to the aerosol model, optical thickness, observation geometry, and phytoplankton. Moreover, T<inf>Q</inf> and T<inf>U</inf> lookup tables were generated for medium- and low-turbidity water, which laid the foundation for extracting the water-leaving radiation polarization information from the satellite observation polarization signal.<br/></div> © 2022 Optica Publishing Group
Number of references:45
Main heading:Turbidity
Controlled terms:Extraction - Polarization - Radiative transfer - Table lookup
Uncontrolled terms:Atmospheric diffuse transmittance - Linear polarization - Polarisation informations - Polarization characteristics - Polarization components - Radiative transfer modelling - Sediment concentration - Solar zenith angle - Top of the atmospheres - Zenith angle
Classification code:701 Electricity and Magnetism - 723.1 Computer Programming - 741.1 Light/Optics - 802.3 Chemical Operations
DOI:10.1364/OE.459666
Funding details: Number: GML2019ZD0602, Acronym: -, Sponsor: -;Number: -, Acronym: SIO, Sponsor: Safety, Infrastructure, and Operations;Number: -, Acronym: MNR, Sponsor: Ministry of Natural Resources of the People's Republic of China;Number: 41825014,42141002,42176182, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017R52001, Acronym: ZJNSF, Sponsor: Natural Science Foundation of Zhejiang Province;Number: -, Acronym: SOED, Sponsor: State Key Laboratory of Satellite Ocean Environment Dynamics;Number: LR18D060001, Acronym: -, Sponsor: Startup Foundation for Hundred-Talent Program of Zhejiang University;Number: QNH3126, Acronym: SIO, SOA, Sponsor: Second Institute of Oceanography, State Oceanic Administration;
Funding text:Funding. Key Special Project for Introduced Talents Team of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0602); National Natural Science Foundation of China (41825014, 42141002, 42176182); Natural Science Foundation of Zhejiang Province (2017R52001); Second Institute of Oceanography, State Ocean Administration (QNH3126); Startup Foundation for Hundred-Talent Program of Zhejiang University (LR18D060001).Key Special Project for Introduced Talents Team of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0602); National Natural Science Foundation of China (41825014, 42141002, 42176182); Natural Science Foundation of Zhejiang Province (2017R52001); Second Institute of Oceanography, State Ocean Administration (QNH3126); Startup Foundation for Hundred-Talent Program of Zhejiang University (LR18D060001). We thank the staffs of the satellite ground station, satellite data processing & sharing center, and marine satellite data online analysis platform of the State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources (SOED/SIO/MNR), for their help with the simulation and data processing. We thank four anonymous reviewers for their constructive comments to improve the manuscript quality.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 469>
Accession number:20224212980927
Title:Improvements in Brazed-Joint Properties of Silicon Nitride and Titanium Alloys Using Laser-Induced Microscale Rice Leaf Structures (Open Access)
Authors:He, Jian-Guo (1, 2, 3); Dai, Shou-Jun (1, 3); Zhao, Yang (4); Huang, Min (1, 2, 3); Liu, Yang (1, 3); Yu, Jia-Qi (1, 3); Tan, Yu (5); Fan, Lian-Wen (6); Ge, Wen-Qi (1, 2); Ma, Yun-Feng (1, 2)
Author affiliation:(1) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing; 100094, China; (4) Beijing Institute of Spacecraft System Engineering, Beijing; 100094, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (6) Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing; 100094, China
Corresponding author:Ma, Yun-Feng(mayf100612@aircas.ac.cn)
Source title:Materials
Abbreviated source title:Mater.
Volume:15
Issue:19
Issue date:October 2022
Publication year:2022
Article number:6750
Language:English
E-ISSN:19961944
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Si<inf>3</inf>N<inf>4</inf> ceramics with a microscale rice leaf structure (MRLS) and titanium alloy were connected via brazing, and the influence of the surface microstructure on the ceramic connection was analyzed. MRLS fabrication is an efficient and high-degree-of-freedom method that can be used to change a material’s surface morphology and wettability. The MRLS was obtained at a laser power of 110 W, with line spacings of 100 and 50 μm. The laser-treated surface included nanoparticles and micro particles, exhibiting a coral-like structure after agglomeration. When the MRLS was used to braze the titanium alloy, no defects were observed at the brazing interface, and the formation was excellent. Throughout the brazed joint, the MRLS remained intact and formed a strong metallurgical bond with the brazing filler metal. A finite element analysis was performed to study the cross-sectional morphology after joint fracture; from the load-time curve, it was found that the MRLS on the surface not only helped improve the mechanical occlusion and brazing area at the interface, but also helped generate compressive stress on the Si<inf>3</inf>N<inf>4</inf> side. Crack propagation was hindered, thereby increasing the joint strength.<br/></div> © 2022 by the authors.
Number of references:26
Main heading:Brazing
Controlled terms:Degrees of freedom (mechanics) - Filler metals - Fillers - Joints (structural components) - Microstructure - Morphology - Silicon alloys - Silicon nitride - Surface morphology - Titanium alloys - Titanium nitride
Uncontrolled terms:Brazed joint - High Degree of Freedom - Joint property - Laser induced - Laser-induced periodic surface structures - Leaf structure - Rice leaves - Structure fabrication - Surface microstructures - Titanium (alloys)
Classification code:408.2 Structural Members and Shapes - 538.1.1 Soldering - 538.2 Welding - 542.3 Titanium and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.2 Inorganic Compounds - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Numerical data indexing:Force 3.00E+00N, Power 1.10E+02W, Size 1.00E-04m, Size 5.00E-05m
DOI:10.3390/ma15196750
Funding details: Number: E2Z204010F, Acronym: -, Sponsor: -;Number: YJKYYQ20200047,YJKYYQ20210028, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018ZDZX01-03-01, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This research was funded by the Instrument Developing Project of the Chinese Academy of Sciences, grant number YJKYYQ20200047, YJKYYQ20210028; the Science and Disruptive Technology Project of the Aerospace Information Research Institute, Chinese Academy of Sciences, grant number E2Z204010F; and the Shaanxi Provincial Key Research and Development Program, grant number 2018ZDZX01-03-01.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 470>
Accession number:20230213368849
Title:One-dimensional simulation of Ar dielectric barrier discharge driven by combined rf/dc sources at atmospheric pressure<sup>*</sup> (Open Access)
Title of translation:射频/直流驱动大气压氩气介质阻挡放电的一维仿真研究 (Open Access)
Authors:Qi, Bing (1, 2, 3, 4); Tian, Xiao (5); Wang, Jing (1); Wang, Yi-Shan (1, 2); Si, Jin-Hai (3); Tang, Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (4) School of Science, Xi’an University of Science and Technology, Xi’an; 710054, China; (5) School of Science, Xi’an Aeronautical University, Xi’an; 710077, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:71
Issue:24
Issue date:December 20, 2022
Publication year:2022
Article number:245202
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">We present the dielectric barrier discharge (DBD) mechanism of argon (Ar) plasma driven by a combination of radio frequency (rf) voltage source and direct current (dc) voltage source at atmospheric pressure, based on one-dimensional self-consistent coupled fluid model. Using the finite element method (FEM) to numerically calculate the model, the average value of period average electron density varying with the average value of period average gas voltage in one rf period, and the variation of the minimum rf sustaining voltage are obtained under different dc voltages. In addition, the spatiotemporal distribution of the electron density and electron generation rate, the spatial distribution of electron temperature, and the time-domain variation of electron conduction current flowing to the dielectric are studied. The results show that the introduction of the dc voltage source has a significant effect on the rf discharge process of atmospheric pressure Ar gas, and the parameters of the plasma state are changed correspondingly. The discharge process is mainly controlled by the air gap voltage, and the dc voltage affects the gap voltage by changing the charge density on the dielectric surface. The minimum rf sustaining voltage V<inf>rf,min</inf> first increases and then decreases with the increase of dc voltage. The amplitude of rf minimum sustaining discharge voltage is changed by the dc voltage. And when the amplitude is reached or exceeded, the discharge is controlled by the rf power supply. On the one hand, in the a mode, when the dc voltage is low, electrons are generated near the ground electrode. The electric field intensity in the ionization area is too small to maintain ionization. When the dc voltage is high, the sheath is formed, and electrons are generated near the rf sheaths on both sides and the boundary of the plasma region. In the g mode, when the rf voltage amplitude is equal to or greater than the rf minimum sustain discharge voltage amplitude, i.e. V<inf>rf</inf> ≥ V<inf>rf,min</inf>, the generation and distribution of electrons are almost unaffected by the dc voltage. On the other hand, in the a mode, the ionization cannot be sustained for the low dc voltage, resulting in the failure to form the main plasma area. Therefore, the electron temperature is generally high. Owing to the high electron density near the ground electrode, the electron temperature is higher. The electron density near the dielectric is less than that near the electrode, so the temperature is lower. When the dc voltage is getting larger, the sheath and the main plasma region are formed. The dc voltage significantly affects the electron temperature by controlling the sheath voltage and the length of the main plasma region. Finally, in the a mode, the electron density near the medium is very low and the air gap voltage is negative for the low dc voltage. As a result, few electrons can reach the surface of the dielectric, and the conduction current of electrons flowing to the medium is very small. With the increase of the dc voltage, the electric field across air gap increases, and electrons, under the action of the electric field, flow from the dielectric surface. The sheath having formed, some speedy non-localization electrons that have reached the dielectric surface are reflected back to the sheath, resulting in a significant reduction in the number of electrons that can reach the dielectric surface.<br/></div> © 2022 Chinese Physical Society.
Number of references:36
Main heading:Dielectric barrier discharge
Controlled terms:Atmospheric pressure - Carrier concentration - Dielectric devices - Dielectric materials - Electric power systems - Electron density measurement - Electron temperature - Flow control - Grounding electrodes - Ionization of gases - Plasma sources - Process control - Radio waves - Spatial distribution
Uncontrolled terms:Air-gaps - Dielectric barrier discharges - Dielectric surface - Direct current voltage - Direct-current - Fluid modeling - Gap voltage - Plasma region - Radiofrequencies - Voltage source
Classification code:405.3 Surveying - 443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 706.1 Electric Power Systems - 708.1 Dielectric Materials - 711 Electromagnetic Waves - 731.3 Specific Variables Control - 802.2 Chemical Reactions - 902.1 Engineering Graphics - 921 Mathematics - 932.3 Plasma Physics
DOI:10.7498/aps.71.20221361
Funding details: Number: S19-020-III, Acronym: -, Sponsor: -;Number: LSIT201807G, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 51877210, 52177166), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2020JM-309), the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (Grant No. LSIT201807G), the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2019JCW-03), the Key Deployment Research Program of XIOPM, China (Grant No. S19-020-III), and the Major Science and Technology Infrastructure Pre-research Program of Chinese Academy of Sciences, China (Grant No. J20-021-III). † Corresponding author. E-mail: tangjie@opt.ac.cn
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 471>
Accession number:20220157093
Title:Observation of high-order imaginary Poynting momentum optomechanics in structured light
Authors:Zhou, Yuan (1, 2); Xu, Xiaohao (3); Zhang, Yanan (1, 2); Li, Manman (1); Yan, Shaohui (1); Nieto-Vesperinas, Manuel (4); Li, Baojun (3); Qiu, Cheng-Wei (5); Yao, Baoli (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China; (4) Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Campus de Cantoblanco, Madrid; 28049, Spain; (5) Department of Electrical and Computer Engineering, National University of Singapore, Singapore; 117583, Singapore
Corresponding authors:Xu, Xiaohao(xuxhao@jnu.edu.cn); Yan, Shaohui(shaohuiyan@opt.ac.cn); Qiu, Cheng-Wei(chengwei.qiu@nus.edu.sg); Yao, Baoli(yaobl@opt.ac.cn)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 7, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">The imaginary Poynting momentum (IPM) of light has been captivated an unusual origin of optomechanical effects on dipolar magnetoelectric particles, but yet observed in experiments. Here, we report, for the very first time, a whole family of high-order IPM forces for not only magnetoelectric but also generic Mie particles, assisted with their excited higher multipoles within. Such optomechanical phenomena derive from a nonlinear contribution of the IPM to the optical force, and can be remarkable even when the incident IPM is small. We observe the high-order optomechanics in a structured light beam with vortex-like IPM streamlines, which allows the low-order dipolar contribution to be suppressed. Our results provide the first unambiguous evidence of the ponderomotive nature of the IPM, expand the classification of optical forces and open new possibilities for optical forces and micromanipulations.<br/></div> © 2022, CC BY.
Number of references:44
Main heading:Incident light
Controlled terms:Optomechanics
Uncontrolled terms:High-order - Higher-order - Magnetoelectrics - Mie particles - Momentum force - Momentum of light - Optical force - Opto-mechanics - Optomechanical - Structured Light
Classification code:741.1 Light/Optics - 961 Systems Science
DOI:10.48550/arXiv.2206.03153
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.03153v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 472>
Accession number:20222812346284
Title:A Tracking Imaging Control Method for Dual-FSM 3D GISC LiDAR (Open Access)
Authors:Cao, Yu (1, 2, 3, 4); Su, Xiuqin (1); Qian, Xueming (2); Wang, Haitao (1); Hao, Wei (1); Xie, Meilin (1); Feng, Xubin (1); Han, Junfeng (1); Chen, Mingliang (5); Wang, Chenglong (5)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (2) School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) CAS Key Laboratory of Space Precision Measurement Technology, Xi’an; 710119, China; (5) Key Laboratory for Quantum Optics and Center for Cold Atom Physics of CAS, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai; 201800, China
Corresponding author:Cao, Yu(caoyu@opt.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:13
Issue date:July-1 2022
Publication year:2022
Article number:3167
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a tracking and pointing control system with dual-FSM (fast steering mirror) composite axis is proposed. It is applied to the target-tracking accuracy control in a 3D GISC LiDAR (three-dimensional ghost imaging LiDAR via sparsity constraint) system. The tracking and pointing imaging control system of the dual-FSM 3D GISC LiDAR proposed in this paper is a staring imaging method with multiple measurements, which mainly solves the problem of high-resolution remote-sensing imaging of high-speed moving targets when the technology is transformed into practical applications. In the research of this control system, firstly, we propose a method that combines motion decoupling and sensor decoupling to solve the mechanical coupling problem caused by the noncoaxial sensor installation of the FSM. Secondly, we suppress the inherent mechanical resonance of the FSM in the control system. Thirdly, we propose the optical path design of a dual-FSM 3D GISC LiDAR tracking imaging system to solve the problem of receiving aperture constraint. Finally, after sufficient experimental verification, our method is shown to successfully reduce the coupling from 7% to 0.6%, and the precision tracking bandwidth reaches 300 Hz. Moreover, when the dis-tance between the GISC system and the target is 2.74 km and the target flight speed is 7 m/s, the tracking accuracy of the system is improved from 15.7 μrad (σ) to 2.2 μrad (σ), and at the same time, the system recognizes the target contour clearly. Our research is valuable to put the GISC technology into practical applications.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:29
Main heading:Feedback
Controlled terms:Flight control systems - Imaging systems - Optical radar - Optical remote sensing - Target tracking
Uncontrolled terms:3d GISC LiDAR - Axis control - Composite axis control - Dual-FSM tracking and aiming - Feedback decoupling - FSM feedback decoupling - Remote sensing imaging - Tracking accuracy - Tracking and pointing - Tracking imaging
Classification code:652.3 Aircraft Instruments and Equipment - 716.2 Radar Systems and Equipment - 731.1 Control Systems - 741.3 Optical Devices and Systems - 746 Imaging Techniques
Numerical data indexing:Frequency 3.00E+02Hz, Percentage 7.00E+00% to 6.00E-01%, Size 2.74E+03m, Velocity 7.00E+00m/s
DOI:10.3390/rs14133167
Funding details: Number: Y99031C2, Acronym: -, Sponsor: -;
Funding text:Acknowledgments: The authors express sincere thanks for the experiments provided by the Photoelectric Tracking and Measurement Technology Laboratory, Xi’an Institute of Optics and Precision Mechanics, CAS and the dual-FSM compound axis tracking and pointing project of the Xi’an Institute of Optics and Precision Mechanics, (grant no. Y99031C2), China.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 473>
Accession number:20223112464746
Title:Large area MCP-PMT design with good time performance (Open Access)
Authors:Chen, Lin (1); Wang, Xingchao (2, 3); He, Jianli (4); Tian, Liping (1); Tian, Jinshou (5); Wang, Yunji (1)
Author affiliation:(1) School of Network and Communication Engineering, Jinling Institute of Technology, Nanjing; 211169, China; (2) School of Electronic Science and Engineering, Southeast University, Nanjing; 210096, China; (3) North Night Vision Technology (NNVT) CO., LTD, Nanjing; 210110, China; (4) Inner Mongolia University of Science and technology, Baotou; 014010, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi’an; 710119, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:30
Issue:14
Issue date:July 4, 2022
Publication year:2022
Pages:25918-25925
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">A new large area photomultiplier tube based on the microchannel plates (MCP-PMT) with high collection efficiency (CE) and good time performance is proposed in this paper. A novel focusing system with two cylindrical and a conical barrels is designed to generate the accelerating and focusing electric field. A three-dimensional model is developed by CST Studio Suite to validate its feasibility. Finite Integral Technique and Monte Carlo method are combined to simulate the process. Results predict that CE of the novel MCP-PMT is expected to be 100%. TTS of the photoelectrons from the whole photocathode achieves 1.2 ns. Differ from other large area PMTs, it performs well in the geomagnetic field.<br/></div> © 2022 Optica Publishing Group
Number of references:12
Main heading:Monte Carlo methods
Controlled terms:Electric fields - Geomagnetism - Image storage tubes - Photomultipliers
Uncontrolled terms:Collection efficiency - Finite integral techniques - Focusing system - Geomagnetic fields - High collection efficiency - MCP-PMT - Micro channel plate - MonteCarlo methods - Performance - Three dimensional modelling
Classification code:481.3.2 Earth Magnetism and Terrestrial Electricity - 701.1 Electricity: Basic Concepts and Phenomena - 714.1 Electron Tubes - 922.2 Mathematical Statistics
Numerical data indexing:Percentage 1.00E+02%, Time 1.20E-09s
DOI:10.1364/OE.464209
Funding details: Number: 12005083, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: jit-b-201837, Acronym: JIT, Sponsor: Jinling Institute of Technology;
Funding text:Funding. National Natural Science Foundation of China (12005083); Ph.D. Project supported by the Jinling Institute of Technology (jit-b-201837).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 474>
Accession number:20223612695604
Title:A Spatial–Spectral Joint Attention Network for Change Detection in Multispectral Imagery (Open Access)
Authors:Zhang, Wuxia (1, 2, 3); Zhang, Qinyu (1); Liu, Shuo (4); Pan, Xiaoying (1); Lu, Xiaoqiang (5)
Author affiliation:(1) School of Computer Science and Technology, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China; (2) Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing, Xi’an; 710121, China; (3) Xi’an Key Laboratory of Big Data and Intelligent Computing, Xi’an; 710121, China; (4) The Department of Electronic Engineering, Chengdu University of Information Technology, Chengdu; 610103, China; (5) The Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Zhang, Wuxia(zhangwuxia@xupt.edu.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:14
Issue date:July 2022
Publication year:2022
Article number:3394
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Change detection determines and evaluates changes by comparing bi-temporal images, which is a challenging task in the remote-sensing field. To better exploit the high-level features, deep-learning-based change-detection methods have attracted researchers’ attention. Most deep-learning-based methods only explore the spatial–spectral features simultaneously. However, we assume the key spatial-change areas should be more important, and attention should be paid to the specific bands which can best reflect the changes. To achieve this goal, we propose the spatial–spectral joint attention network (SJAN). Compared with traditional methods, SJAN introduces the spatial–spectral attention mechanism to better explore the key changed areas and the key separable bands. To be more specific, a novel spatial-attention module is designed to extract the spatially key regions first. Secondly, the spectral-attention module is developed to adaptively focus on the separable bands of land-cover materials. Finally, a novel objective function is proposed to help the model to measure the similarity of learned spatial–spectral features from both spectrum amplitude and angle perspectives. The proposed SJAN is validated on three benchmark datasets. Comprehensive experiments have been conducted to demonstrate the effectiveness of the proposed SJAN.<br/></div> © 2022 by the authors.
Number of references:52
Main heading:Change detection
Controlled terms:Deep learning - Feature extraction - Remote sensing
Uncontrolled terms:Attention mechanisms - Change detection - High-level features - Joint attention - Multispectral imagery - Remote-sensing - Sensing fields - Spatial–spectral feature - Spectral feature - Temporal images
Classification code:461.4 Ergonomics and Human Factors Engineering
DOI:10.3390/rs14143394
Funding details: Number: XUPT-KLND(201902, Acronym: -, Sponsor: -;Number: 62001378, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 20JK0913, Acronym: -, Sponsor: Education Department of Shaanxi Province;
Funding text:This work was supported in part by the Shaanxi Provincial Department of Education 2020 Scientific Research Plan under Grant 20JK0913, in part by the National Natural Science Foundation of China under Grant 62001378, in part by the Shaanxi Province Network Data Analysis and Intelligent Processing Key Laboratory Open Fund under Grant XUPT-KLND(201902), and by a special project for the construction of key disciplines in general higher education institutions in Shaanxi Province.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 475>
Accession number:20221011749712
Title:Coherent injection photocurrent in bismuth sulfide film induced by one-plus-two photon absorption quantum interference
Authors:He, Yuhang (1); Chen, Yuxuan (1); Lu, Chunhui (2); Zhang, Yifan (1); Tian, Zhen (1); Xu, Xinlong (2); Dai, Jianming (1)
Author affiliation:(1) Center for Terahertz Waves, School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin; 300072, China; (2) State Key Laboratory of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics & Photon-Technology, School of Physics, Northwest University, Xi'an; 710069, China
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:47
Issue:5
Issue date:March 1, 2022
Publication year:2022
Pages:1206-1209
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:The Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Quantum interference (QuI) effect is a powerful method to generate and control the ultrafast photocurrent in semiconductors. We utilize two-color pulsed light excitation in bismuth sulfide (Bi2S3) film to induce the photocurrent through the QuI effect. Experimentally, the photocurrent is indirectly monitored using a standard terahertz (THz) timedomain spectroscopic system. Due to the QuI, an asymmetric photon injection occurs in Bi2S3 film, resulting in coherent injection current and subsequently THz wave generation. Our results on the pump pulse energy dependence of the THz electric field suggests that the THz wave generation process follows the third-order nonlinear optical process.<br/></div> © 2022 Optica Publishing Group.
Number of references:31
Main heading:Bismuth compounds
Controlled terms:Photocurrents - Quantum interference devices - Electric fields - Layered semiconductors - Optical pumping - Two photon processes - Sulfur compounds - Photons - Terahertz waves
Uncontrolled terms:Pulsed-light excitation - Quantum interference - Quantum interference effects - Spectroscopic systems - Tera Hertz - Terahertz wave generation - Terahertz-wave generation - Time domain - Two-color - Ultra-fast
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 931.3 Atomic and Molecular Physics
DOI:10.1364/OL.445990
Funding details: Number: 12074311,61875151,62075157, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0701000, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Natural Science Foundation of China (61875151, 62075157, 12074311); National Key Research and Development Program of China (2017YFA0701000).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 476>
Accession number:20225013248952
Title:Coastline Recognition Algorithm Based on Multi-Feature Network Fusion of Multi-Spectral Remote Sensing Images (Open Access)
Authors:Qiu, Shi (1); Ye, Huping (2, 3); Liao, Xiaohan (2, 3, 4)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) State Key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (3) Key Laboratory of Low Altitude Geographic Information and Air Route, Civil Aviation Administration of China, Beijing; 100101, China; (4) The Research Center for UAV Applications and Regulation, Chinese Academy of Sciences, Beijing; 100101, China
Corresponding author:Ye, Huping(yehp@igsnrr.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:23
Issue date:December 2022
Publication year:2022
Article number:5931
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Remote sensing images can obtain broad geomorphic features and provide a strong basis for analysis and decision making. As 71% of the earth is covered by water, shipping has become an efficient means of international trade and transportation, and the development level of coastal cities will directly reflect the development level of a country. The coastline is the boundary line between seawater and land, so it is of great significance to accurately identify it to assist shipping traffic and docking, and this identification will also play a certain auxiliary role in environmental analysis. Currently, the main problems of coastline recognition conducted by remote sensing images include: (1) in the process of remote sensing, image transmission inevitably brings noise causing poor image quality and difficult image quality enhancement; (2) s single scale does not allow for the identification of coastlines at different scales; and (3) features are under-utilized, false detection is high and intuitive measurement is difficult. To address these issues, we used the following multispectral methods: (1) a PCA-based image enhancement algorithm was proposed to improve image quality; (2) a dual attention network and HRnet network were proposed to extract suspected coastlines from different levels; and (3) a decision set fusion approach was proposed to transform the coastline identification problem into a probabilistic problem for coastline extraction. Finally, we constructed a coastline straightening model to visualize and analyze the recognition effect. Experiments showed that the algorithm has an AOM greater than 0.88 and can achieve coastline extraction.<br/></div> © 2022 by the authors.
Number of references:72
Main heading:Remote sensing
Controlled terms:Decision making - Extraction - Image enhancement - Image fusion - Image quality - International trade - Landforms - Ships
Uncontrolled terms:Coastline extraction - Dual attention - Hrnet - Multi-spectral - Multifeatures - Network fusion - PCA - Recognition algorithm - Remote sensing images - Remote-sensing
Classification code:481.1 Geology - 723.2 Data Processing and Image Processing - 802.3 Chemical Operations - 912.2 Management
Numerical data indexing:Percentage 7.10E+01%
DOI:10.3390/rs14235931
Funding details: Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: 41971359,YJKYYQ20200010, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDA2003030201, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: A2206, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;
Funding text:This work is supported by the Strategic Priority Research Program of Chinese Academy of Sciences (No. XDA2003030201), Technology Rising Star of Shaanxi Youth (No. 2021KJXX-61), The National Natural Science Foundation of China (No. 41971359), the Scientific Instrument Developing Project of the Chinese Academy of Sciences, (No. YJKYYQ20200010), the State Key Lab of CAD&CG, Zhejiang University (No. A2206).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 477>
Accession number:20221812059540
Title:Structural Insights into the Mechanism of High-Affinity Binding of Ochratoxin A by a DNA Aptamer
Authors:Xu, Guohua (1); Zhao, Jiajing (1, 5); Yu, Hao (2, 4); Wang, Chen (1, 4); Huang, Yangyu (6); Zhao, Qiang (2, 3, 4); Zhou, Xin (1); Li, Conggang (1); Liu, Maili (1)
Author affiliation:(1) Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan; 430071, China; (2) State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Hangzhou Institute for Advanced Study, UCAS, Hangzhou; 310000, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) Xi'An Modern Chemistry Research Institute, Xi'an; 710065, China; (6) Shaoyang University, Shaoyang; 422000, China
Corresponding authors:Li, Conggang(conggangli@wipm.ac.cn); Zhao, Qiang(qiangzhao@rcees.ac.cn)
Source title:Journal of the American Chemical Society
Abbreviated source title:J. Am. Chem. Soc.
Volume:144
Issue:17
Issue date:May 4, 2022
Publication year:2022
Pages:7731-7740
Language:English
ISSN:00027863
E-ISSN:15205126
CODEN:JACSAT
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">A 36-mer guanine (G)-rich DNA aptamer (OBA36) is able to distinguish one atomic difference between ochratoxin analogues A (OTA) and B (OTB), showing prominent recognition specificity and affinity among hundreds of aptamers for small molecules. Why OBA36 has >100-fold higher binding affinity to OTA than OTB remains a long-standing question due to the lack of high-resolution structure. Here we report the solution NMR structure of the aptamer-OTA complex. It was found that OTA binding induces the aptamer to fold into a well-defined unique duplex-quadruplex structural scaffold stabilized by Mg<sup>2+</sup>and Na<sup>+</sup>ions. OTA does not directly interact with the G-quadruplex, but specifically binds at the junction between the double helix and G-quadruplex through π-πstacking, halogen bonding (X-bond), and hydrophobic interaction. OTB has the same binding site as OTA but lacks the X-bond. The strong X-bond formed between the chlorine atom of OTA and the aromatic ring of C5 is the key to discriminating the strong binding toward OTA. The present research contributes to a deeper insight of aptamer molecular recognition, reveals structural basis of the high-affinity binding of aptamers, and provides a foundation for further aptamer engineering and applications.<br/></div> © 2022 American Chemical Society. All rights reserved.
Number of references:53
Main heading:Scaffolds
Controlled terms:Binding energy - Hydrophobicity
Uncontrolled terms:Aptamers - Dna aptamer - G-quadruplexes - Guanine - High affinity binding - Ochratoxin A - Ochratoxins - Recognition specificity - Small molecules - Structural insights
Classification code:405.1 Construction Equipment - 801.4 Physical Chemistry - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1021/jacs.2c00478
Funding details: Number: 21874146,21874149,21921004,21925406,22074156, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0505400, Acronym: MOST, Sponsor: Ministry of Science and Technology of the People's Republic of China;
Funding text:This work is supported by National Natural Science Foundation of China grants (21925406, 21874149, 21921004, 21874146, 22074156) and Ministry of Science and Technology of China grant [2017YFA0505400].
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 478>
Accession number:20220370992
Title:Symmetry-compatible angular momentum conservation relation in plasmonic vortex lenses with rotational symmetries
Authors:Yang, Jie (1); Feng, Pengyi (2); Han, Fei (3, 4); Zheng, Xuezhi (1); Wang, Jiafu (5); Jin, Zhongwei (6); Verellen, Niels (3, 4); Janssens, Ewald (3); Ni, Jincheng (7); Chen, Weijin (7); Yang, Yuanjie (8); Zhang, Anxue (5); Bai, Benfeng (2); Qiu, Chengwei (7); Vandenbosch, Guy A.E. (1)
Author affiliation:(1) WaveCoRE research group, KU Leuven, Kasteelpark Arenberg 10, BUS 2444, Leuven; B-3001, Belgium; (2) State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing; 100084, China; (3) Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Leuven; 3001, Belgium; (4) IMEC, Leuven; 3001, Belgium; (5) Xi’an Jiaotong University, Xianning West Road 28, Shaanxi province, Xi’an; 710049, China; (6) College of Optical and Electronic Technology, China Jiliang University, Hangzhou; 310018, China; (7) Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore; 117583, Singapore; (8) School of Physics, University of Electronic Science and Technology of China, Chengdu; 611731, China
Corresponding authors:Zheng, Xuezhi(xuezhi.zheng@esat.kuleuven.be); Wang, Jiafu(wangjiafu1981@126.com)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:September 28, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Plasmonic vortex lenses (PVLs), producing vortex modes, known as plasmonic vortices (PVs), in the process of plasmonic spin-orbit coupling, provide a promising platform for the realization of many optical vortex-based applications. Very recently, it has been reported that a single PVL can generate multiple PVs. This work exploits the representation theory of finite groups, reveals the symmetry origin of the generated PVs, and derives a new conservation relation based on symmetry principles. Specifically, the symmetry principles divide the near field of the PVL into regions, designate integers, which are the topological charges, to the regions, and, particularly, give an upper bound to the topological charge of the PV at the center of the PVL. Further application of the symmetry principles to the spin-orbit coupling process leads to a new conservation relation. Based on this relation, a two-step procedure is suggested to link the angular momentum of the incident field with the one of the generated PVs through the symmetries of the PVL. This theory is well demonstrated by numerical calculations. This work provides an alternative but essential symmetry perspective on the dynamics of spin-orbit coupling in PVLs, forms a strong complement for the physical investigations performed before, and therefore lays down a solid foundation for flexibly manipulating the PVs for emerging vortex-based nanophotonic applications.<br/></div> Copyright © 2022, The Authors. All rights reserved.
Number of references:35
Main heading:Plasmonics
Controlled terms:Angular momentum - Lenses - Spin dynamics - Topology - Vortex flow
Uncontrolled terms:Angular momentum conservation - Angular momentum conservation relation - Electromagnetic scattering - Finite groups - Plasmonic vortex - Plasmonics - Representation theory - Representation theory of finite group - Spin-orbit couplings - Spin-orbital coupling
Classification code:631.1 Fluid Flow, General - 741.3 Optical Devices and Systems - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics
DOI:10.48550/arXiv.2209.14735
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2209.14735v3
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 479>
Accession number:20221511951912
Title:Pencil-beam scanning catheter for intracoronary optical coherence tomography (Open Access)
Authors:Kang, Jiqiang (1); Zhu, Rui (2, 3, 4); Sun, Yunxu (1); Li, Jianan (3, 4); Wong, Kenneth K. Y. (5, 6)
Author affiliation:(1) School of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen; 518055, China; (2) International Graduate School at Shenzhen, Tsinghua University, Shenzhen; 518055, China; (3) Shenzhen Vivolight Medical Device & Technology Co., Ltd, Shenzhen; 518055, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (5) Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong; (6) Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, New Territories, Hong Kong
Corresponding authors:Sun, Yunxu(sunyunxu@hit.edu.cn); Wong, Kenneth K. Y.(kywong@eee.hku.hk)
Source title:Opto-Electronic Advances
Abbreviated source title:Opto-Electron. Adv.
Volume:5
Issue:3
Issue date:2022
Publication year:2022
Article number:200050
Language:English
ISSN:20964579
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">Current gradient-index (GRIN) lens based proximal-driven intracoronary optical coherence tomography (ICOCT) probes consist of a spacer and a GRIN lens with large gradient constant. This design provides great flexibility to control beam profiles, but the spacer length should be well controlled to obtain desired beam profiles and thus it sets an obstacle in mass catheter fabrication. Besides, although GRIN lens with large gradient constant can provide tight focus spot, it has short depth of focus and fast-expanded beam which leads to poor lateral resolution for deep tissue. In this paper, a type of spacer-removed probe is demonstrated with a small gradient constant GRIN lens. This design simplifies the fabrication process and is suitable for mass production. The output beam of the catheter is a narrow nearly collimated light beam, referred to as pencil beam here. The full width at half maximum beam size varies from 35.1 μm to 75.3 μm in air over 3-mm range. Probe design principles are elaborated with probe/catheter fabrication and performance test. The in vivo imaging of the catheter was verified by a clinical ICOCT system. Those results prove that this novel pencil-beam scanning catheter is potentially a good choice for ICOCT systems.<br/></div> © The Author(s) 2022.
Number of references:36
Main heading:Optical tomography
Controlled terms:Probes - Catheters - Lenses - Fabrication
Uncontrolled terms:'current - Beam profiles - Beam-scanning - Endoscopic imaging - Fiber optics imaging - Gradient-index lens - Intravascular imaging - Optical coherence tomography probes - Pencil beam - Tomography system
Classification code:462.1 Biomedical Equipment, General - 741.3 Optical Devices and Systems
Numerical data indexing:Size 3.00E-03m, Size 3.51E-05m to 7.53E-05m
DOI:10.29026/oea.2022.200050
Funding details: Number: 81927805, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JCYJ20160427183803458, Acronym: -, Sponsor: Science and Technology Planning Project of Shenzhen Municipality;
Funding text:We are grateful for financial supports from the National Natural Science Foundation of China (Grant No. 81927805) and Shenzhen Municipal Science and Technology Plan Project, China (Grant No. JCYJ20160427183803458).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 480>
Accession number:20223912795255
Title:Ultralow electron emission yield achieved on alumina ceramic surfaces and its application in multipactor suppression
Authors:Wang, Dan (1, 2); Mao, Zhangsong (1); Ye, Zhen (3); Cai, Yahui (1); Li, Yun (4); He, Yongning (1); Qi, Kangcheng (5); Xu, Yanan (6); Jia, Qingqing (6)
Author affiliation:(1) School of Microelectronics, Xi’an Jiaotong University, Xi’an; 710049, China; (2) ZhongKe Atomically Precise Manufacturing Technology Co. Ltd, Xi’an; 710119, China; (3) Xi’an TST Testing Technique Co. Ltd, Xi’an; 710076, China; (4) The National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology (Xi’an), Xi’an; 710100, China; (5) School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu; 610000, China; (6) Shanghai Institute of Space Propulsion, Shanghai Engineering Research Center of Space Engine, Shanghai; 201112, China
Corresponding authors:Wang, Dan(alexaustin@xjtu.edu.cn); He, Yongning(yongning@mail.xjtu.edu.cn)
Source title:Journal of Physics D: Applied Physics
Abbreviated source title:J Phys D
Volume:55
Issue:45
Issue date:November 10, 2022
Publication year:2022
Article number:455301
Language:English
ISSN:00223727
E-ISSN:13616463
CODEN:JPAPBE
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Alumina ceramics used in microwave systems are susceptible to the multiplication of secondary electron emission on the surface due to the influence of resonance between electrons and the radiofrequency electric field, and a detrimental multipactor effect may therefore be triggered. For the alumina-loaded microwave components, it is essential to achieve low secondary electron yield (SEY) on the inserted alumina surfaces to mitigate multipactor. In this work, to achieve an ultralow SEY surface of alumina, two recognized low-SEY treatments were combined. For the primary SEY suppression, a series of microstructures were fabricated on the alumina surfaces with varied porosity and aspect ratio at the hundred-micrometer scale by infrared laser etching. The microstructure with 52.14% porosity and 1.78 aspect ratio showed an excellent low-SEY property, which could suppress the SEY peak value ( δ <inf>m</inf> ) of alumina from 2.46 to 1.00. For the secondary SEY suppression, the SEY dependence of TiN coating on sputtering parameters was studied, and the lowest δ <inf>m</inf> of 1.19 was achieved when the gas flow ratio of Ar:N<inf>2</inf> was 15:7.5. Thereafter, by depositing TiN ceramic coating onto the laser-etched porous samples, an ultralow SEY, with δ <inf>m</inf> of 0.69, was achieved on the alumina surfaces. The simulation work revealed the impact of dielectric surface charge on electron multiplication and revealed a mechanism of using low-SEY surfaces to inhibit multipactor. Some coaxial filters filled with alumina were fabricated for verification; the results revealed that the multipactor threshold increased from 125 W to 425 W after applying the TiN-coated porous alumina, and to 650 W after treating another multipactor-sensitive area with the same low-SEY process. This work developed an advisable method to sharply reduce SEY, which is of great significance for the multipactor mitigation of alumina-loaded microwave components.<br/></div> © 2022 IOP Publishing Ltd.
Number of references:45
Main heading:Microstructure
Controlled terms:Alumina - Aluminum oxide - Aspect ratio - Ceramic materials - Electric fields - Electrons - Etching - Porosity - Secondary emission - Titanium nitride
Uncontrolled terms:Alumina ceramic - Alumina surface - Aspect-ratio - Electron emission yields - Microwave components - Multipactors - Secondary electron emissions - Secondary electron yield - Yield suppression - Yield surface
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 812.1 Ceramics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
Numerical data indexing:Percentage 5.214E+01%, Power 1.25E+02W to 4.25E+02W, Power 6.50E+02W
DOI:10.1088/1361-6463/ac86df
Funding details: Number: 62101425,U1832190, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021LLRH-03, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;Number: 17DZ2280800, Acronym: -, Sponsor: Shanghai Engineering Research Center of Space Engine;
Funding text:This work is supported by the National Natural Science Foundation of China (Grant Nos. 62101425, U1832190), the Shanghai Engineering Research Center of Space Engine (Grant No. 17DZ2280800), and the Key Research and Development Program of Shaanxi (Program No. 2021LLRH-03).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 481>
Accession number:20224413049651
Title:Automatic Laboratory Martian Rock and Mineral Classification Using Highly-Discriminative Representation Derived from Spectral Signatures (Open Access)
Authors:Yang, Juntao (1, 2, 3); Kang, Zhizhong (2, 3, 4); Yang, Ze (2, 3, 4); Xie, Juan (2, 3, 4); Xue, Bin (5); Yang, Jianfeng (5); Tao, Jinyou (5)
Author affiliation:(1) College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao; 266590, China; (2) School of Land Science and Technology, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing; 100083, China; (3) Subcenter of International Cooperation and Research on Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education of The People’s Republic of China, No. 29 Xueyuan Road, Haidian District, Beijing; 100083, China; (4) Lunar and Planetary Remote Sensing Exploration Research Center, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing; 100083, China; (5) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Kang, Zhizhong(zzkang@cugb.edu.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:14
Issue:20
Issue date:October 2022
Publication year:2022
Article number:5070
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The optical properties of rocks and minerals provide a reliable way to measure their chemical and mineralogical composition due to the specific reflection behaviors, which is also the key insight behind most automatic identification and classification approaches. However, the inter-category spectral similarity poses a great challenge to the automatic identification and classification tasks because of the diversity of rocks and minerals. Therefore, this paper develops a recognition and classification approach of rocks and minerals using the highly discriminative representation derived from their raw spectral signatures. More specifically, a transformer-based classification approach integrated with category-aware contrastive learning is constructed and trained in an end-to-end manner, which would force instances of the same category to remain close-by while pushing instances of a dissimilar category far apart in the high-dimensional feature space, in order to produce the highly discriminative feature representation of the rocks and minerals. From both qualitative and quantitative views, experiments are conducted on the laboratory sample dataset with 30 types of rocks and minerals shared from the National Mineral Rock and Fossil Specimens Resource Center, and the spectral information of the laboratory rocks and minerals is captured using a multi-spectral sensor, with a duplicated payload of the counterpart onboard the Zhurong rover. Quantitative results demonstrate that the developed approach can effectively distinguish 30 types of rocks and minerals, with a high overall accuracy of 96.92%. Furthermore, the developed approach is remarkably superior to other existing methods, with average differences of 4.75% in the overall accuracy. Furthermore, we also visualized the derived highly discriminative features of different types of rocks and minerals by projecting them onto a two-dimensional map, where the same categories tend to be modeled by nearby locations and the dissimilar categories by distant locations with high probability. It can be observed that, compared with those in the raw spectral feature space, the clusters are formed better in the derived highly discriminative feature space, which further confirms the promising representation capability.<br/></div> © 2022 by the authors.
Number of references:59
Main heading:Minerals
Controlled terms:Automation - Martian surface analysis - Optical properties - Rocks
Uncontrolled terms:Automatic identification - Classification approach - Contrastive learning - Discriminative features - Highly discriminative representation - Identification and classification - Mars exploration - Multispectral sensors - Spectral signature - Transformer
Classification code:482.2 Minerals - 731 Automatic Control Principles and Applications - 741.1 Light/Optics
Numerical data indexing:Percentage 4.75E+00%, Percentage 9.692E+01%
DOI:10.3390/rs14205070
Funding details: Number: D020103, Acronym: -, Sponsor: -;Number: 871149,G2021025006L, Acronym: H2020, Sponsor: Horizon 2020 Framework Programme;Number: 41872207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019YFE0123300, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: Z191100004319001, Acronym: -, Sponsor: Beijing Science and Technology Planning Project;
Funding text:This research was jointly supported by the National Key Research and Development Program of China (No. 2019YFE0123300), National Natural Science Foundation of China (No. 41872207), Civil Aerospace Technology Advance Research Project of National Defense Science and Engineering (No. D020103), Beijing Science and Technology Project (No. Z191100004319001), the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 871149, and Introduction plan of high-end foreign experts (No. G2021025006L).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 482>
Accession number:20224112848675
Title:High-efficiency modulation of broadband polarization conversion with a reconfigurable chiral metasurface (Open Access)
Authors:Wei, Zeyong (1, 2); Zhao, Yunlong (1, 2); Zhang, Yujing (3); Cai, Weiqi (3); Fan, Yuancheng (3); Wang, Zhanshan (1, 2); Cheng, Xinbin (1, 2)
Author affiliation:(1) School of Physics Science and Engineering, MOE Key Laboratory of Advanced Micro-Structured Materials, Institute of Precision Optical Engineering, Tongji University, Shanghai; 200092, China; (2) Shanghai Frontiers Science Research Base of Digital Optics, Tongji University, Shanghai; 200092, China; (3) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China
Corresponding authors:Fan, Yuancheng(phyfan@nwpu.edu.cn); Cheng, Xinbin(chengxb@tongji.edu.cn)
Source title:Nanoscale Advances
Abbreviated source title:Nanoscale Adv.
Volume:4
Issue:20
Issue date:August 31, 2022
Publication year:2022
Pages:4344-4350
Language:English
E-ISSN:25160230
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate an electrically biased reconfigurable chiral metasurface for controlling the polarization conversion and asymmetric transmission in a broadband manner. The reconfigurable metasurface is constructed with coupled three-layer complementary split-ring resonator (CSRR) arrays and is loaded with tunable electronic components to achieve dynamic control of reconfigurable chiral coupling in the CSRRs by simply tuning the external voltage on the structure. It is found that the polarization conversion in the metasurface can be effectively and continuously tuned in both experiments and simulations in a broadband frequency range. Meanwhile, the reconfigurable metasurface shows an asymmetric transmission (AT) effect in a broadband range for a polarized wave. The proposed reconfigurable chiral metasurface based on the active tuning of connection in the meta-structure with few functional layers is confirmed as an effective strategy for multi-functional polarization manipulation. The reported broadband properties of the chiral metasurface are promising for polarization manipulation in optical bands and applications in wireless communication.<br/></div> © 2022 The Author(s).
Number of references:82
Main heading:Polarization
Controlled terms:Optical communication - Optical resonators - Transmissions - Tuning
Uncontrolled terms:Asymmetric transmissions - Complementary split-ring resonator - Electronic component - Higher efficiency - Metasurface - Polarization conversion - Reconfigurable - Resonator arrays - Three-layer - Tunables
Classification code:602.2 Mechanical Transmissions - 717.1 Optical Communication Systems - 741.3 Optical Devices and Systems
DOI:10.1039/d2na00382a
Funding details: Number: 11874285,12074314,61621001,61925504,6201101335,62020106009,62061136008,62111530053, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:We are grateful for financial support from the National Natural Science Foundation of China (Grants No. 11874285, 12074314, 61621001, 61925504, 6201101335, 62020106009, 62061136008, and 62111530053).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
<RECORD 483>
Accession number:20222512237158
Title:Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe<inf>4</inf> (Open Access)
Authors:Lai, Jiawei (1); Ma, Junchao (1); Fan, Zipu (1); Song, Xiaoming (2); Yu, Peng (3); Liu, Zheng (4); Zhang, Pei (5); Shi, Yi (6); Cheng, Jinluo (7); Sun, Dong (1, 8)
Author affiliation:(1) International Center for Quantum Materials, School of Physics, Peking University, Beijing; 100871, China; (2) State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin; 300072, China; (3) State Key Laboratory of Optoelectronic Materials and Technologies, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering, Sun Yat-sen University, Guangdong, Guangzhou; 510275, China; (4) Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore; 639798, Singapore; (5) Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China; (6) School of Electronic Science and Engineering, Nanjing University, Nanjing; 210008, China; (7) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (8) Collaborative Innovation Center of Quantum Matter, Beijing; 100871, China
Corresponding author:Sun, Dong(sundong@pku.edu.cn)
Source title:Advanced Materials
Abbreviated source title:Adv Mater
Volume:34
Issue:29
Issue date:July 21, 2022
Publication year:2022
Article number:2201229
Language:English
ISSN:09359648
E-ISSN:15214095
CODEN:ADVMEW
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">The direct photocurrent detection capability of light orbital angular momentum (OAM) has recently been realized with topological Weyl semimetals, but it is limited to the near-infrared wavelength range. The extension of the direct OAM detection capability to the mid-infrared band, which is a wave band that plays an important role in a vast range of applications, has not yet been realized. This is because the photocurrent responses of most photodetectors are neither sensitive to the phase information nor efficient in the mid-infrared region. In this study, a photodetector based on the type-II Weyl semimetal tantalum iridium telluride (TaIrTe<inf>4</inf>) is designed with peculiar electrode geometries to directly detect the topological charge of the OAM using the orbital photogalvanic effect (OPGE). The results indicate that the helical phase gradient of light can be distinguished by a current winding around the optical beam axis, with a magnitude proportional to its quantized OAM mode number. The topologically enhanced responses in the mid-infrared region of TaIrTe<inf>4</inf> further help overcome the low responsivity issues and finally render direct OAM detection capability. This study enables on-chip-integrated OAM detection, and thus OAM-sensitive focal plane arrays in the mid-infrared region.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:58
Main heading:Photodetectors
Controlled terms:Angular momentum - Infrared devices - Iridium compounds - Photons - Tantalum compounds - Tellurium compounds - Topology
Uncontrolled terms:Detection capability - Mid-infrared regions - Midinfrared - Near-infrared wavelength - Orbital angular momentum - Photo detection - Type II - Vortex beams - Wavelength ranges - Weyl semimetal
Classification code:921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 931.3 Atomic and Molecular Physics
DOI:10.1002/adma.202201229
Funding details: Number: OEMT-2021-PZ-02, Acronym: -, Sponsor: -;Number: 12034001,12174301, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021M690231, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: JQ19001, Acronym: -, Sponsor: Beijing Municipal Natural Science Foundation;Number: BX20200015, Acronym: -, Sponsor: National Postdoctoral Program for Innovative Talents;Number: 2020YFA0308800,2021YFA1400100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This project was supported by the National Natural Science Foundation of China (NSFC Grant Nos. 12034001 and 12174301), the National Key Research and Development Program of China (Grant Nos. 2020YFA0308800 and 2021YFA1400100), and the Beijing Nature Science Foundation (JQ19001). J.L. was also supported by the China National Postdoctoral Program for Innovative Talent (BX20200015) and the China Postdoctoral Science Foundation (2021M690231). P.Y. was supported by the Plan Fostering Project of the State Key Laboratory of Optoelectronic Materials and Technologies of Sun Yat-sen University (No. OEMT-2021-PZ-02). The also thank Junliang Jia for his help in drawing the schematic diagram.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
<RECORD 484>
Accession number:20220811691429
Title:Families of gap solitons and their complexes in media with saturable nonlinearity and fractional diffraction
Authors:Zeng, Liangwei (1); Belić, Milivoj R. (2); Mihalache, Dumitru (3); Shi, Jincheng (4); Li, Jiawei (5); Li, Siqi (5); Lu, Xiaowei (1); Cai, Yi (1); Li, Jingzhen (1)
Author affiliation:(1) Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronics Engineering, Shenzhen University, Shenzhen; 518060, China; (2) Texas A & M University at Qatar, Doha; 23874, Qatar; (3) Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Bucharest; 077125, Romania; (4) 54th Research Institute of CETC, Shijiazhuang; 050011, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding authors:Li, Jingzhen(lijz@szu.edu.cn); Belić, Milivoj R.(milivoj.belic@qatar.tamu.edu)
Source title:Nonlinear Dynamics
Abbreviated source title:Nonlinear Dyn
Volume:108
Issue:2
Issue date:April 2022
Publication year:2022
Pages:1671-1680
Language:English
ISSN:0924090X
E-ISSN:1573269X
CODEN:NODYES
Document type:Journal article (JA)
Publisher:Springer Science and Business Media B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate the existence of various types of gap localized modes, including one- and two-dimensional (1D and 2D) single solitons and soliton clusters, as well as the corresponding vortex modes in optical media with saturable Kerr nonlinearity and fractional diffraction. We find that soliton clusters with different number of peaks can be stable in these media. The 1D and 2D localized modes existing at the center of the first and second band gaps are stable, whereas the ones in the peripheries are unstable. In addition, the vortex modes with different number of peaks and vorticity number m= 1 are found to be stable, while the ones with m≥ 2 are unstable. The stability of these localized modes is investigated by using the linear stability analysis and is confirmed by the numerical simulation of their dynamical propagation. The obtained results may enrich the understanding of gap solitons and their complexes in media with saturable nonlinearity and fractional diffraction, and may find potential applications in optical information processing and other related fields.<br/></div> © 2022, The Author(s), under exclusive licence to Springer Nature B.V.
Number of references:79
Main heading:Diffraction
Controlled terms:Optical data processing - Vortex flow - Nonlinear equations - Energy gap - Nonlinear optics - Optical Kerr effect - Solitons - Linear stability analysis
Uncontrolled terms:Fractional diffraction - Gap soliton - Localized modes - Nonlinear schrödinge equation - One-dimensional - Saturable nonlinearity - Single soliton - Soliton clusters - Two-dimensional - Vortex mode
Classification code:631.1 Fluid Flow, General - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 921 Mathematics
DOI:10.1007/s11071-022-07291-z
Funding details: Number: 2019007, Acronym: -, Sponsor: -;Number: NPRP-S11-1126-170033, Acronym: QNRF, Sponsor: Qatar National Research Fund;Number: 12174264,61827815,62075138, Acronym: NNSFC, NNSF, NSF, NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021A1515011909, Acronym: -, Sponsor: Natural Science Foundation of Guangdong Province;Number: JCYJ20190808121817100,JCYJ20190808164007485,JSGG20191231144201722, Acronym: -, Sponsor: Science and Technology Planning Project of Shenzhen Municipality;
Funding text:National Major Instruments and Equipment Development Project of National Natural Science Foundation of China (61827815); National Natural Science Foundation of China (12174264, 62075138); Natural Science Foundation of Guangdong Province (2021A1515011909); Science and Technology Project of Shenzhen (JCYJ20190808121817100, JCYJ20190808164007485, JSGG20191231144201722); Natural Science Foundation of Shenzhen University (2019007); Qatar National Research Fund (NPRP-S11-1126-170033).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 485>
Accession number:20222512246048
Title:Mechanical Polarization Switching in Hf<inf>0.5</inf>Zr<inf>0.5</inf>O<inf>2</inf>Thin Film
Authors:Guan, Zhao (1); Li, Yun-Kangqi (1); Zhao, Yi-Feng (1); Peng, Yue (2); Han, Genquan (2, 3); Zhong, Ni (1, 4, 5); Xiang, Ping-Hua (1, 4); Chu, Jun-Hao (1); Duan, Chun-Gang (1, 4)
Author affiliation:(1) Key Laboratory Of Polar Materials And Devices (MOE), State Key Laboratory Of Precision Spectroscopy, East China Normal University, 500 Dongchuan Rd., Shanghai; 200241, China; (2) School Of Microelectronics, Xidian University, Xi'an; 710071, China; (3) Emerging Device And Chip Laboratory, Hangzhou Institute Of Technology, Xidian University, Hangzhou; 311200, China; (4) Collaborative Innovation Center Of Extreme Optics, Shanxi University, Shanxi, Taiyuan; 030006, China; (5) Zhejiang Lab, Zhejiang, Hangzhou; 311121, China
Corresponding authors:Zhong, Ni(nzhong@ee.ecnu.edu.cn); Duan, Chun-Gang(cgduan@clpm.ecnu.edu.cn)
Source title:Nano Letters
Abbreviated source title:Nano Lett.
Volume:22
Issue:12
Issue date:June 22, 2022
Publication year:2022
Pages:4792-4799
Language:English
ISSN:15306984
E-ISSN:15306992
CODEN:NALEFD
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:<div data-language="eng" data-ev-field="abstract">HfO2-based films with high compatibility with Si and complementary metal-oxide semiconductors (CMOS) have been widely explored in recent years. In addition to ferroelectricity and antiferroelectricity, flexoelectricity, the coupling between polarization and a strain gradient, is rarely reported in HfO2-based films. Here, we demonstrate that the mechanically written out-of-plane domains are obtained in 10 nm Hf0.5Zr0.5O2 (HZO) ferroelectric film at room temperature by generating the stress gradient via the tip of an atomic force microscope. The results of scanning Kelvin force microscopy (SKPM) exclude the possibility of flexoelectric-like mechanisms and prove that charge injection could be avoided by mechanical writing and thus reveal the true polarization state, promoting wider flexoelectric applications and ultrahigh-density storage of HZO thin films.<br/></div> © 2022 The Authors. Published by American Chemical Society.
Number of references:64
Main heading:Thin films
Controlled terms:CMOS integrated circuits - Ferroelectric films - Ferroelectricity - Hafnium oxides - Metals - MOS devices - Oxide films - Oxide semiconductors - Polarization - Silicon compounds - Zirconium compounds
Uncontrolled terms:Complementary metal oxide semiconductors - Ferroelectricity and antiferroelectricity - Flexoelectric - Flexoelectricity - Hf0.5zr0.5o2 thin film - Mechanical - Mechanical switching - PFM - Polarization switching - Thin-films
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 804 Chemical Products Generally
Numerical data indexing:Size 1.00E-08m
DOI:10.1021/acs.nanolett.2c01066
Funding details: Number: 2021MD0AC01, Acronym: -, Sponsor: -;Number: 20ZR1418300, Acronym: -, Sponsor: Natural Science Foundation of Shanghai;Number: 11874149,12074119,12134003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 006, Acronym: ECNU, Sponsor: East China Normal University;Number: 2017YFA0303403, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 19JC1416700, Acronym: -, Sponsor: Science and Technology Innovation Plan Of Shanghai Science and Technology Commission;
Funding text:This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0303403), National Natural Science Foundation of China (Grant Nos. 12074119, 11874149, and 12134003), Shanghai Science and Technology Innovation Action Plan (Grant No. 19JC1416700), Natural Science Foundation of Shanghai (Grant No. 20ZR1418300), ECNU (East China Normal University) Multifunctional Platform for Innovation (006), the Fundamental Research Funds for the Central Universities and Major Scientific Research Project of Zhejiang Lab (Grant No. 2021MD0AC01).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 486>
Accession number:20224613122488
Title:Localization in Coupled Systems: Part IV-Geometric Manufacturing Errors in A Mode-localized Three Cantilever Array
Authors:Zhang, Ye (1); Yang, Jian (1); Zhou, Di (1, 3); Liu, Shuyi (1); Wang, Dong F. (1, 2); Itoh, Toshihiro (2, 4); Maeda, Ryutaro (2, 5)
Author affiliation:(1) Micro Engineering and Micro Systems Laboratory (JML), School of Mechanical and Aerospace Engineering (SAME), Jilin University, Changchun; 130022, China; (2) Research Center for Ubiquitous Mems and Micro Engineering, Aist, Tsukuba; 305-8564, Japan; (3) Changchun Institute of Optics, Fine Mechanics and Physics, Cas, Changchun; 130033, China; (4) Department of Precision Engineering, University of Tokyo, Tokyo; 113-8656, Japan; (5) State Key Laboratory for Manufacturing Systems Engineering, Xi an Jiaotong University, Xi'an; 710049, China
Corresponding author:Wang, Dong F.(dongfwang@jlu.edu.cn)
Source title:2022 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS, DTIP 2022
Abbreviated source title:Symp. Des., Test, Integr. Packag. MEMS/MOEMS, DTIP
Part number:1 of 1
Issue title:2022 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS, DTIP 2022
Issue date:2022
Publication year:2022
Language:English
ISBN-13:9781665491679
Document type:Conference article (CA)
Conference name:2022 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS, DTIP 2022
Conference date:July 11, 2022 - July 13, 2022
Conference location:Pont-a-Mousson, France
Conference code:183490
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In our previous related works of DTIP, amplitude enhancement was studied back in DTIP2011, while damping issue was preliminarily considered in DTIP2017. In DTIP2018, vibration characteristics was analyzed in a four cantilever array with and without mass perturbation. In this paper however, a calibration methodology is proposed for coupled resonators with manufacturing errors, where the detuning of their stiffness and mass will destroy the perfect localized equilibrium state. A localized trio cantilever array is taken as an example. The basic idea is to calibrate the manufacturing error on corresponding cantilever by sweeping the frequency before and after adding a known mass. The proposed methodology is supported at both theoretical and simulation levels for calibrating the manufacturing errors in the length, width, and thickness directions of the entire structure respectively.<br/></div> © 2022 IEEE.
Number of references:29
Main heading:Errors
Controlled terms:Calibration - Manufacture - Nanocantilevers - Vibration analysis
Uncontrolled terms:Calibration methodologies - Cantilever arrays - Coupled cantilever array - Geometric manufacturing error - Localisation - Localised - Manufacturing errors - Mode localization - Sweep frequencies - Swept-frequency
Classification code:537.1 Heat Treatment Processes - 761 Nanotechnology - 913.4 Manufacturing - 933 Solid State Physics
DOI:10.1109/DTIP56576.2022.9911755
Funding details: Number: 2020122366JC, Acronym: -, Sponsor: -;Number: 51675229,51975250, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 419080500171,419080500246, Acronym: JLU, Sponsor: Jilin University;
Funding text:This work was supported by National Natural Science Foundation of China (NSFC) with Grant No. 51975250 and Grant No. 51675229. This work was also supported by Free Exploration Key Project of Jilin Natural Science Foundation (NSFJ) with Grant No. 2020122366JC, Scientific Research Foundation for Leading Professor Program of Jilin University (Grant No. 419080500171 & No. 419080500246).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 487>
Accession number:20222712331078
Title:Terahertz meta-biosensor based on high-Q electrical resonance enhanced by the interference of toroidal dipole
Authors:Zhang, Chiben (1, 2); Xue, Tingjia (3); Zhang, Jin (1); Li, Zhenfei (1); Liu, Longhai (4, 5); Xie, Jianhua (4); Yao, Jianquan (5); Wang, Guangming (2); Ye, Xiaodan (3, 6); Zhu, Weiren (1)
Author affiliation:(1) Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Air and Missile Defense College, Air Force Engineering University, Xi'an; 710051, China; (3) Department of Radiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai; 200030, China; (4) Advantest (China) Co., Ltd, Shanghai; 201203, China; (5) College of Precision Instruments and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin; 300072, China; (6) Department of Radiology, Shanghai Institute of Medical Imaging, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai; 200032, China
Corresponding authors:Zhu, Weiren(weiren.zhu@sjtu.edu.cn); Ye, Xiaodan(yuanyxd@163.com); Wang, Guangming(wgming01@sina.com)
Source title:Biosensors and Bioelectronics
Abbreviated source title:Biosens. Bioelectron.
Volume:214
Issue date:October 15, 2022
Publication year:2022
Article number:114493
Language:English
ISSN:09565663
E-ISSN:18734235
CODEN:BBIOE4
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Electrical dipole resonances typically have low Q factor and broad resonant linewidth caused by strong free-space coupling with high radiative loss. Here, we present a strategy for enhancing the Q factor of the electrical resonance via the interference of a toroidal dipole. To validate such a strategy, a metasurface consisting of two resonators is designed that responsible to the electric and toroidal dipoles. According to constructive and destructive hybridizations of the two dipole modes, enhanced and decreased Q factors are found respectively for the two hybrid modes, compared to the one for the conventional electric dipole resonance. As a practical application of such high Q resonance, we further experimentally investigate the sensing performance of the metasurface biosensor by detecting the cell concentration of lung cancer cells (type A549). Moreover, through monitoring both resonance frequency and amplitude variation of the metasurface biosensor, the dielectric permittivity of the lung cancer cells is delicately estimated by the conjoint analysis of both simulated and measured results. Our proposed metasurface paves a promising way for the study of multipole interference in the field of nanophotonics and validates its effectiveness in biomedical sensing.<br/></div> © 2022 Elsevier B.V.
Number of references:43
Main heading:Biosensors
Controlled terms:Biological organs - Cancer cells - Cells - Diseases - Permittivity - Q factor measurement - Resonance
Uncontrolled terms:Biosensing - Electrical dipoles - Electrical resonances - Interference enhancement - Lung cancer cells - Lung cancer detections - Metasurface - Q-factors - Resonance enhanced - Tera Hertz
Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 931.1 Mechanics - 942.2 Electric Variables Measurements
DOI:10.1016/j.bios.2022.114493
Funding details: Number: 61871394,62071291,81571629,82071990, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 19411965200, Acronym: STCSM, Sponsor: Science and Technology Commission of Shanghai Municipality;Number: YJT20191015, Acronym: SCH, Sponsor: Shanghai Chest Hospital;
Funding text:This work was supported by National Natural Science Foundation of China (NSFC) ( 82071990 , 81571629 , 62071291 , 61871394 ), Project of Shanghai Science and Technology Commission ( 19411965200 ) and Shanghai Chest Hospital Project of Collaborative Innovative Grant YJT20191015 .
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 488>
Accession number:20214311083696
Title:Knowledge tensor embedding framework with association enhancement for breast ultrasound diagnosis of limited labeled samples
Authors:Xi, Jianing (1); Miao, Zhaoji (2); Liu, Longzhong (3); Yang, Xuebing (4, 5); Zhang, Wensheng (4, 5); Huang, Qinghua (1); Li, Xuelong (1)
Author affiliation:(1) School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi’ an 710072, China, and also with the Key Laboratory of Intelligent Interaction and Applications (Northwestern Polytechnical University), Northwestern Polytechnical University, Xi'an; 710072, China; (2) School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China; (3) The Cancer Center of Sun Yat-sen University, Guangzhou; 510060, China; (4) Research Center of Precision Sensing and Control, Institute of Automation, Chinese Academy of Sciences, Beijing; 100190, China; (5) University of Chinese Academy of Sciences, Beijing; 101408, China
Corresponding author:Huang, Qinghua(qhhuang@nwpu.edu.cn)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:468
Issue date:January 11, 2022
Publication year:2022
Pages:60-70
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In the AI diagnosis of breast cancer, instead of ultrasound images from non-standard acquisition process, the Breast Image Reporting and Data System (BI-RADS) reports are widely accepted as the input data since it can give standardized descriptions for the breast ultrasound samples. The BI-RADS reports are usually stored as the format of Knowledge Graph (KG) due to the flexibility, and the KG embedding is a common procedure for the AI analysis on BI-RADS data. However, since most existing embedding methods are based on the local connections in KG, in the situation of limited labeled samples, there is a clear need for embedding based diagnosis method which is capable of representing the global interactions among all entities/relations and associating the labeled/unlabeled samples. To diagnose the breast ultrasound samples with limited labels, in this paper we propose an efficient framework Knowledge Tensor Embedding with Association Enhancement Diagnosis (KTEAED), which adopts tensor decomposition into the embedding to achieve the global representation of KG entities/relations, and introduces the association enhancement strategy to prompt the similarities between embeddings of labeled/unlabeled samples. The embedding vectors are then utilized to diagnose the clinical outcomes of samples by predicting their links to outcomes entities. Through extensive experiments on BI-RADS data with different fractions of labels and ablation studies, our KTEAED displays promising performance in the situations of various fractions of labels. In summary, our framework demonstrates a clear advantage of tackling limited labeled samples of BI-RADS reports in the breast ultrasound diagnosis.<br/></div> © 2021 Elsevier B.V.
Number of references:55
Main heading:Embeddings
Controlled terms:Knowledge graph - Tensors - Medical imaging - Ultrasonics
Uncontrolled terms:Breast images - Breast ultrasound - Data systems - Embeddings - Knowledge graphs - Limited labeled sample - Reporting systems - Tensor decomposition - Ultrasound diagnosis - Unlabeled samples
Classification code:461.1 Biomedical Engineering - 723.4 Artificial Intelligence - 746 Imaging Techniques - 753.1 Ultrasonic Waves - 921.1 Algebra
DOI:10.1016/j.neucom.2021.10.013
Funding details: Number: 2021TD-57, Acronym: -, Sponsor: -;Number: 2019JC-13, Acronym: -, Sponsor: -;Number: 61901322,62071382, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673494, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018AAA0102104, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work is supported by National Key Research and Development Program of China (Grant No. 2018AAA0102104), and partially by National Natural Science Foundation of China (Grant Nos. 61901322 and 62071382), and partially by China Postdoctoral Science Foundation (No. 2020M673494), and partially by Innovation Capability Support Program of Shaanxi (Program No. 2021TD-57), and partially by Shaanxi Provincial Foundation for Distinguished Young Scholars (No. 2019JC-13).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 489>
Accession number:20221912099545
Title:Recent Advances and Challenges in Ultrafast Photonics Enabled by Metal Nanomaterials
Authors:Wang, Gang (1, 2); Liu, Tingyi (2); Chao, Jiale (2); Jin, Hong (2); Liu, Jiayao (2); Zhang, Han (2, 3); Lyu, Wenhao (2); Yin, Peng (4); Al-Ghamdi, Ahmed (5); Wageh, Swelm (5); Fu, Bo (1, 2)
Author affiliation:(1) Key Laboratory of Big Data-Based Precision Medicine Ministry of Industry and Information Technology, School of Engineering Medicine, Beihang University, Beijing; 100191, China; (2) School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing; 100191, China; (3) Interdisciplinary Center of High Magnetic Field Physics of Shenzhen University, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China; (4) School of Information Communication, National University of Defense Technology, Xi'an; 710106, China; (5) Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah; 21589, Saudi Arabia
Corresponding authors:Fu, Bo(fubo10@buaa.edu.cn); Zhang, Han(hzhang@szu.edu.cn)
Source title:Advanced Optical Materials
Abbreviated source title:Adv. Opt. Mater.
Volume:10
Issue:11
Issue date:June 3, 2022
Publication year:2022
Article number:2200443
Language:English
E-ISSN:21951071
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Nanomaterials with outstanding optical properties are widely used in ultrafast photonics. Especially, metal nanomaterials have attracted increasing attention in recent years owing to the surface plasmon resonance that further enhances their nonlinear optical response, making them suitable for generating ultrafast pulses in a wide range of wavebands. Herein, the fabrication and integration processes of typical metal nanomaterials such as gold, silver, and copper, as well as their applications in ultrafast lasers are reviewed. The synthesis methods of metal nanomaterials, which can be divided into dry and wet methods, are first introduced with their characteristics and advantages summarized. Moreover, the integration approaches that are used to incorporate metal nanomaterials into laser cavities are discussed, where sandwich structure based on polymer film and deposition method, as well as evanescent-wave structure based on D-shaped and tapered fiber are demonstrated. Besides, the state of the art of typical ultrafast lasers enabled by metal nanoparticles is systematically reviewed. Finally, current challenges and perspectives on the development of ultrafast photonics enabled by metal nanomaterials are proposed.<br/></div> © 2022 Wiley-VCH GmbH.
Number of references:228
Main heading:Polymer films
Controlled terms:Metals - Surface plasmon resonance - Nonlinear optics - Integration - Optical properties - Ultrafast lasers - Metal nanoparticles - Semiconducting films
Uncontrolled terms:Fabrication process - Integration method - Metal nanomaterials - Nonlinear optical response - Structure-based - Surface-plasmon resonance - Synthesis method - Ultra-fast photonics - Ultrafast pulse - Wavebands
Classification code:712.1 Semiconducting Materials - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 744.1 Lasers, General - 761 Nanotechnology - 815.1 Polymeric Materials - 921.2 Calculus
DOI:10.1002/adom.202200443
Funding details: Number: 62071016,62111530239, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 4202044, Acronym: -, Sponsor: Natural Science Foundation of Beijing Municipality;Number: 2018YFB2003200, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:G.W., T.L., and J.C. contributed equally to this work. This work was supported by the National Key Research and Development Program of China (2018YFB2003200), Beijing Natural Science Foundation (4202044), the National Natural Science Foundation of China (62071016, 62111530239), and the Fundamental Research Funds for the Central Universities.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 490>
Accession number:20214611165675
Title:Terahertz toroidal metasurface biosensor for sensitive distinction of lung cancer cells (Open Access)
Authors:Zhang, Chiben (1, 2); Xue, Tingjia (3); Zhang, Jin (1); Liu, Longhai (4, 5); Xie, Jianhua (4); Wang, Guangming (2); Yao, Jianquan (5); Zhu, Weiren (1); Ye, Xiaodan (3, 6)
Author affiliation:(1) Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Air and Missile Defense College, Air Force Engineering University, Xi'an, China; (3) Department of Radiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai; 200030, China; (4) Advantest (China) Co. Ltd, Shanghai; 201203, China; (5) College of Precision Instruments and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin; 300072, China; (6) Department of Radiology, Shanghai Institute of Medical Imaging, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai; 200032, China
Corresponding authors:Zhu, Weiren(weiren.zhu@sjtu.edu.cn); Ye, Xiaodan(yuanyxd@163.com); Ye, Xiaodan(yuanyxd@163.com)
Source title:Nanophotonics
Abbreviated source title:Nanophotonics
Volume:11
Issue:1
Issue date:January 1, 2022
Publication year:2022
Pages:101-109
Language:English
E-ISSN:21928614
Document type:Journal article (JA)
Publisher:De Gruyter Open Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Lung cancer is the most frequently life-threatening disease and the prominent cause of cancer-related mortality among human beings worldwide, where poor early diagnosis and expensive detection costs are considered as significant reasons. Here, we try to tackle this issue by proposing a novel label-free and low-cost strategy for rapid detection and distinction of lung cancer cells relying on plasmonic toroidal metasurfaces at terahertz frequencies. Three disjoint regions are displayed in identifiable intensity-frequency diagram, which could directly help doctors determine the type of lung cancer cells for clinical treatment. The metasurface is generated by two mirrored gold split ring resonators with subwavelength sizes. When placing analytes on the metasurface, apparent shifts of both the resonance frequency and the resonance depth can be observed in the terahertz transmission spectra. The theoretical sensitivity of the biosensor over the reflective index reaches as high as 485.3 GHz/RIU. Moreover, the proposed metasurface shows high angular stability for oblique incident angle from 0 to 30°, where the maximum resonance frequency shift is less than 0.66% and the maximum transmittance variation keeps below 1.33%. To experimentally verify the sensing strategy, three types of non-small cell lung cancer cells (Calu-1, A427, and 95D) are cultured with different concentrations and their terahertz transmission spectra are measured with the proposed metasurface biosensor. The two-dimensional fingerprint diagram considering both the frequency and transmittance variations of the toroidal resonance dip is obtained, where the curves for different cells are completely separated with each other. This implies that we can directly distinguish the type of the analyte cells and its concentration by only single spectral measurement. We envisage that the proposed strategy has potential for clinical diagnosis and significantly expands the capabilities of plasmonic metamaterials in biological detection.<br/></div> © 2021 Chiben Zhang et al., published by De Gruyter, Berlin/Boston.
Number of references:37
Main heading:Biosensors
Controlled terms:Diseases - Cancer cells - Diagnosis - Transmissions - Biological organs - Cells - Metamaterials - Plasmonics - Natural frequencies - Cytology
Uncontrolled terms:Analytes - Biosenser - Early diagnosis - Human being - Lung Cancer - Lung cancer cells - Metasurface - Tera Hertz - Terahertz transmission - Transmission spectrums
Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 461.9 Biology - 602.2 Mechanical Transmissions - 932.3 Plasma Physics - 951 Materials Science
Numerical data indexing:Frequency 4.853E+11Hz, Percentage 1.33E+00%, Percentage 6.60E-01%
DOI:10.1515/nanoph-2021-0520
Funding details: Number: 61871394,62071291,81571629,82071990, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 19411965200, Acronym: STCSM, Sponsor: Science and Technology Commission of Shanghai Municipality;Number: YJT20191015, Acronym: SCH, Sponsor: Shanghai Chest Hospital;
Funding text:Research funding: This work was supported by National Natural Science Foundation of China (NSFC) (82071990, 81571629, 62071291, 61871394), Project of Shanghai Science and Technology Commission (19411965200) and Shanghai Chest Hospital Project of Collaborative Innovative Grant YJT20191015.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 491>
Accession number:20221411876137
Title:BST-silicon hybrid terahertz meta-modulator for dual-stimuli-triggered opposite transmission amplitude control (Open Access)
Authors:Dong, Bowen (1); Zhang, Cheng (2); Guo, Guanxuan (3); Zhang, Xueqian (3); Wang, Yuchao (2); Huang, Lingling (4); Ma, Hua (1); Cheng, Qiang (5)
Author affiliation:(1) Department of Basic Sciences, Air Force Engineering University, Xi'an; 710038, China; (2) Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan; 430070, China; (3) Center for Terahertz Waves and College of Precision Instrument, Optoelectronics Engineering and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education, Tianjin University, Tianjin; 300072, China; (4) School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (5) Department of Radio Engineering, State Key Laboratory of Millimeter Waves, Southeast University, Nanjing; 210096, China
Corresponding authors:Ma, Hua(mahuar@xjtu.edu.cn); Zhang, Cheng(czhang2020@whut.edu.cn); Cheng, Qiang(qiangcheng@seu.edu.cn)
Source title:Nanophotonics
Abbreviated source title:Nanophotonics
Volume:11
Issue:9
Issue date:April 1, 2022
Publication year:2022
Pages:2075-2083
Language:English
E-ISSN:21928614
Document type:Journal article (JA)
Publisher:De Gruyter Open Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">With the drafting of the 6G white paper, terahertz (THz) modulators reshow profound significance in wireless communication, data storage, and imaging. Active tuning of THz waves through hybrid meta-structure incorporated with smart materials has attracted keen interest due to the deliberate structural design and dynamic transition of material properties. However, until now, these meta-devices have usually been responsive to a single driving field, such as electrical, thermal, or optical stimuli, which hinders their applicability for multidimensional manipulation of THz waves. Herein, to the best of our knowledge, a Ba0.6Sr0.4TiO3-silicon hybrid meta-modulator to achieve opposite tuning of the amplitude characteristic with two different types of stimuli is proposed for the first time. When driven by an external voltage, the proposed meta-modulator exhibits enhanced transmittance. In contrast, the transmission coefficient gradually decays as the external current increases. This outstanding performance is systematically studied by analyzing the carrier transport in the meta-structure as well as the change in the dielectric constant. Our research provides a novel idea for the development of actively tunable THz meta-devices and paves the way for robust multifunctionality in electrically controlled THz switching, and biosensors. <br/></div> © 2022 Bowen Dong et al., published by De Gruyter, Berlin/Boston.
Number of references:43
Main heading:Hybrid materials
Controlled terms:Metamaterials - Transmissions - Tuning - Digital storage - Terahertz waves - Modulators - Silicon - Structural design
Uncontrolled terms:Amplitude control - Dual external stimulus - External stimulus - Metastructures - Opposite transmission amplitude control - Tera Hertz - Terahertz meta-modulator - Transmission amplitude - White papers - Wireless communications
Classification code:408.1 Structural Design, General - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 602.2 Mechanical Transmissions - 711 Electromagnetic Waves - 713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 722.1 Data Storage, Equipment and Techniques - 951 Materials Science
DOI:10.1515/nanoph-2022-0018
Funding details: Number: GD21203, Acronym: -, Sponsor: -;Number: 61722106,61731010,62101394, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0700201,2017YFA0700202,2017YFA0700203,2018YFA0701904,2020YFA0710100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2021IVA064, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Research funding: This work was supported in part by the National Key Research and Development Program of China (2018YFA0701904, 2017YFA0700201, 2017YFA0700202, 2017YFA0700203, and 2020YFA0710100), the National Natural Science Foundation of China (62101394, 61722106, and 61731010), the Fundamental Research Funds for the Central Universities (WUT: 2021IVA064), the Foundation from Guangxi Key Laboratory of Optoelectronic Information Processing (GD21203).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
<RECORD 492>
Accession number:20220211435784
Title:Highly Sensitive Humidity Sensor Based on a GO/Co-MOF-74 Coated Long Period Fiber Grating
Authors:Yan, Jingci (1); Feng, Jijun (1); Ge, Jinman (2); Chen, Jian (1); Wang, Feng (3); Xiang, Caiwei (3); Wang, Ding (3); Yu, Qinghua (4); Zeng, Heping (5)
Author affiliation:(1) Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System, Ministry of Education, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai; 200093, China; (2) National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology, Xi'an; 710100, China; (3) School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai; 200093, China; (4) Key Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (5) Chongqing Key Laboratory of Precision Optics, Chongqing Institute, East China Normal University, Chongqing; 401120, China
Corresponding author:Feng, Jijun(fjijun@usst.edu.cn)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:34
Issue:2
Issue date:January 15, 2022
Publication year:2022
Pages:77-80
Language:English
ISSN:10411135
E-ISSN:19410174
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A humidity sensor based on graphene oxide (GO)/Co-MOF-74 coated long period fiber grating is experimentally demonstrated. The long period fiber grating is prepared by CO2 laser direct writing method, with GO/Co-MOF-74 composite humidity sensitive material coated around the grating region. Combination of GO and Co-MOF-74 with porous structure can absorb water molecules effectively and improve the sensitivity. A high humidity sensitivity of 0.204 nm/%RH can be realized in the RH range of 30-50% as well as a value of 0.16 dB/%RH in the range of 50-90%, both with a linearity of more than 0.98. The proposed highly sensitive humidity sensor also shows a good performance in the stability and repeatability.<br/></div> © 1989-2012 IEEE.
Number of references:30
Main heading:Humidity sensors
Controlled terms:Carbon dioxide lasers - Molecules - Graphene oxide - Fibers - Diffraction gratings
Uncontrolled terms:Co-MOF-74 - CO2-laser - Fiber gratings - Graphene oxide - Laser direct writing - Laser direct-writing - Long period fiber grating - Long-period fibre gratings - Optical device fabrication - Sensitivity
Classification code:443.2 Meteorological Instrumentation - 741.3 Optical Devices and Systems - 744.2 Gas Lasers - 931.3 Atomic and Molecular Physics - 951 Materials Science
Numerical data indexing:Decibel 1.60E-01dB, Percentage 3.00E+01% to 5.00E+01%, Percentage 5.00E+01% to 9.00E+01%, Size 2.04E-10m
DOI:10.1109/LPT.2021.3139114
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 493>
Accession number:20230413449797
Title:The Earth 2.0 Space Mission for Detecting Earth-like Planets around Solar Type Stars
Authors:Ge, Jian (1); Zhang, Hui (1); Deng, Hongping (1); Zhang, Yongshuai (1); Li, Yan (1); Zhou, Dan (1); Tang, Zhenghong (1); Zhang, Congcong (1); Wang, Chaoyan (1); Yu, Yong (1); Yao, Xinyu (1); Zhu, Jiapeng (1); Fang, Tong (2); Chen, Wen (2); Chen, Kun (2); Han, Xingbo (2); Yang, Yingquan (2); Bi, Xingzi (2); Zhang, Kuoxiang (2); Chen, Yonghe (3); Liu, Xiaohua (3); Yin, Dayi (3); Zhang, Quan (3); Yang, Baoyu (3); Wei, Chuanxin (3); Zhu, Yuji (3); Song, Zongxi (4); Gao, Wei (4); Li, Wei (4); Wang, Fengtao (4); Cheng, Pengfei (4); Shen, Chao (4); Pan, Yue (4); Zhang, Hongfei (5); Wang, Jian (5); Wang, Hui (5); Chen, Cheng (5); Zhang, Jun (5); Wang, Zhiyue (5); Zang, Weicheng (6); Mao, Shude (6); Zhu, Wei (6); Wang, Sharon Xuesong (6); Xie, Jiwei (7); Liu, Huigen (7); Zhou, Jilin (7); Yang, Ming (7); Jiang, Chaofeng (7); Chen, Dichang (7); Tang, Wei (7); Sun, Mengfei (7); Wang, Mutian (7); Li, Yudong (8); Wen, Lin (8); Feng, Jie (8); Willis, Kevin (9); Huang, Chelsea (10); Ma, Bo (11); Wang, Yonghao (11); Shen, Rongfeng (11); Tam, Pak-Hin Thomas (11); Hu, Zhecheng (11); Yang, Yanlv (11); Feng, Fabo (11, 12); Xiang, Maosheng (13, 15); Yu, Jie (14); Zhang, Jinghua (15); Wu, Yaqian (15); Zong, Weikai (16); Yuan, Haibo (16); Li, Tanda (16); Zhao, Yinan (17); Zou, Yuanchuan (18); Liu, Beibei (18, 19); Yang, Jun (20); Ye, Quanzhi (21); Yin, Qing-Zhu (22)
Author affiliation:(1) Shanghai Astronomical Observatory, Chinese Academy of Sciences, China; (2) Innovation Academy for Microsatellites, Chinese Academy of Sciences, China; (3) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, China; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (5) Department of Modern Physics, University of Science and Technology of China, China; (6) Department of Astronomy, Tsinghua University, China; (7) Department of Astronomy, Nanjing University, China; (8) Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, China; (9) Science Talent Training Center, Gainesville; FL, United States; (10) Centre for Astrophysics, University of Southern Queensland, Australia; (11) School of Physics and Astronomy, Sun-Yat-Sen University, China; (12) Tsung-Dao Lee Institute, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai; 200240, China; (13) Max Planck Institute for Astronomy, Germany; (14) Max Planck Institute for Solar System Research, Germany; (15) National Astronomical Observatory of China, China; (16) Department of Astronomy, Beijing Normal University, China; (17) Department of Astronomy, Geneva University, Switzerland; (18) Department of Astronomy, Huazhong University of Science and Technology, China; (19) Department of Physics, Zhejiang University, China; (20) School of Physics, Peking University, Beijing, China; (21) Department of Astronomy, University of Maryland, College Park; MD; 20742, United States; (22) Department of Earth and Planetary Sciences, University of California, Davis; CA; 95616, United States
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12180
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Issue date:2022
Publication year:2022
Article number:1218015
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653412
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, Canada
Conference code:185861
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">A space mission called "Earth 2.0 (ET)" is being developed in China to address a few of fundamental questions in the exoplanet field: How frequently habitable Earth-like planets orbit solar type stars (Earth 2.0s)? How do terrestrial planets form and evolve? Where did floating planets come from? ET consists of six 30 cm diameter transit telescope systems with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. The ET transit mode will monitor ~1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously for four years while the microlensing mode monitors over 30M I< 20.6 stars in the Galactic bulge direction. ET will merge its photometry data with that from Kepler to increase the time baseline to 8 years. This enhances the transit signal-to-noise ratio, reduce false positives, and greatly increases the chance to discover Earth 2.0s. Simulations show that ET transit telescopes will be able to identify ~17 Earth 2.0s, about 4,900 Earth-sized terrestrial planets and about 29,000 new planets. In addition, ET will detect about 2,000 transit-timing-variation (TTV) planets and 700 of them will have mass and eccentricity measurements. The ET microlensing telescope will be able to identify over 1,000 microlensing planets. With simultaneous observations with the ground-based KMTNet telescopes, ET will be able to measure masses of over 300 microlensing planets and determine the mass distribution functions of free-floating planets and cold planets. ET will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years.<br/></div> © 2022 SPIE.
Number of references:42
Main heading:Photometry
Controlled terms:Distribution functions - Earth (planet) - Extrasolar planets - Orbits - Satellites - Signal to noise ratio - Space telescopes - Stars
Uncontrolled terms:Earth-like planets - Exo-planets - Field of views - Galactic bulge - Micro-lensing - Solar type stars - Space missions - Telescope system - Terrestrial planets - Transit
Classification code:655.2 Satellites - 657.2 Extraterrestrial Physics and Stellar Phenomena - 716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems - 922.1 Probability Theory - 941.4 Optical Variables Measurements
Numerical data indexing:Age 4.00E+00yr, Age 8.00E+00yr, Size 3.00E-01m, Size 3.50E-01m, Time 2.00E+00s
DOI:10.1117/12.2630656
Funding details: Number: XDA15020600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: U of T, Sponsor: University of Toronto;
Funding text:The ET consortium is very grateful for the early critical contribution to the project development from Prof. Yanqin Wu of the University of Toronto and the invaluable suggestions provided by all reviewers of the project. The ET mission study is supported by the Strategic Priority Program on Space Science, the Chinese Academy of Sciences, Grant No. XDA15020600.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 494>
Accession number:20220183176
Title:ET White Paper: To Find the First Earth 2.0
Authors:Ge, Jian (1); Zhang, Hui (1); Zang, Weicheng (2); Deng, Hongping (1); Mao, Shude (2, 17); Xie, Ji-Wei (3); Liu, Hui-Gen (3); Zhou, Ji-Lin (3); Willis, Kevin (20); Huang, Chelsea (26); Howell, Steve B. (41, 42); Feng, Fabo (5); Zhu, Jiapeng (1); Yao, Xinyu (1); Liu, Beibei (8); Aizawa, Masataka (5); Zhu, Wei (2); Li, Ya-Ping (1); Ma, Bo (4); Ye, Quanzhi (11, 12); Yu, Jie (6); Xiang, Maosheng (7, 17); Yu, Cong (4); Liu, Shangfei (4); Yang, Ming (3); Wang, Mu-Tian (3); Shi, Xian (1); Fang, Tong (1); Zong, Weikai (28); Liu, Jinzhong (13); Zhang, Yu (13); Zhang, Liyun (16); El-Badry, Kareem (36); Shen, Rongfeng (4); Tam, Pak-Hin Thomas (4); Hu, Zhecheng (4); Yang, Yanlv (4); Zou, Yuan-Chuan (14); Wu, Jia-Li (14); Lei, Wei-Hua (14); Wei, Jun-Jie (15); Wu, Xue-Feng (15); Sun, Tian-Rui (15); Wang, Fa-Yin (3); Zhang, Bin-Bin (3); Xu, Dong (17); Yang, Yuan-Pei (18); Li, Wen-Xiong (19); Xiang, Dan-Feng (2); Wang, Xiaofeng (2); Wang, Tinggui (9, 10); Zhang, Bing (43); Jia, Peng (40); Yuan, Haibo (28); Zhang, Jinghua (17); Wang, Sharon Xuesong (2); Gan, Tianjun (2); Wang, Wei (14); Zhao, Yinan (24, 25); Liu, Yujuan (14); Chen, Yonghe (21); Wei, Chuanxin (21); Kang, Yanwu (21); Yang, Baoyu (21); Qi, Chao (21); Liu, Xiaohua (21); Zhang, Quan (21); Zhu, Yuji (21); Zhou, Dan (1); Zhang, Congcong (1); Yu, Yong (1); Zhang, Yongshuai (1); Li, Yan (1, 63, 64, 65, 66); Tang, Zhenghong (1); Wang, Chaoyan (1); Wang, Fengtao (22); Li, Wei (22); Cheng, Pengfei (22); Shen, Chao (22); Li, Baopeng (22); Pan, Yue (22); Yang, Sen (22); Gao, Wei (22); Song, Zongxi (22); Wang, Jian (9); Zhang, Hongfei (9); Chen, Cheng (9); Wang, Hui (9); Zhang, Jun (9); Wang, Zhiyue (9); Zeng, Feng (9); Zheng, Zhenhao (9); Zhu, Jie (9); Guo, Yingfan (9); Zhang, Yihao (9); Li, Yudong (44); Wen, Lin (44); Feng, Jie (44); Chen, Wen (23); Chen, Kun (23); Han, Xingbo (23); Yang, Yingquan (23); Wang, Haoyu (23); Duan, Xuliang (23); Huang, Jiangjiang (23); Liang, Hong (23); Bi, Shaolan (28); Gai, Ning (30); Ge, Zhishuai (46); Guo, Zhao (29); Huang, Yang (18); Li, Gang (39); Li, Haining (17); Li, Tanda (28); Lu, Yuxi Lucy (37, 38); Rix, Hans-Walter (7); Shi, Jianrong (17); Song, Fen (31); Tang, Yanke (30); Ting, Yuan-Sen (26, 27); Wu, Tao (63, 64, 65, 66); Wu, Yaqian (17); Yang, Taozhi (47); Yin, Qing-Zhu (45); Gould, Andrew (7, 32); Lee, Chung-Uk (33); Dong, Subo (34); Yee, Jennifer C. (34); Shvartzvald, Yossi (35); Yang, Hongjing (2); Kuang, Renkun (2); Zhang, Jiyuan (2); Liao, Shilong (1); Qi, Zhaoxiang (1); Yang, Jun (44); Zhang, Ruisheng (3); Jiang, Chen (6); Ou, Jian-Wen (48); Li, Yaguang (49, 54); Beck, Paul (50); Bedding, Timothy R. (49, 54); Campante, Tiago L. (51, 52); Chaplin, William J. (53, 54, 55); Christensen-Dalsgaard, Jørgen (54); García, Rafael A. (56); Gaulme, Patrick (6); Gizon, Laurent (6, 57, 58); Hekker, Saskia (59, 60); Huber, Daniel (61); Khanna, Shourya (62); Mathur, Savita (67, 68); Miglio, Andrea (53, 70, 71); Mosser, Benoît (72); Ong, J.M. Joel (61, 73)
Author affiliation:(1) Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China; (2) Tsinghua University, Beijing, China; (3) Nanjing University, Nanjing, China; (4) Sun Yat-Sen University, Zhuhai, China; (5) Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China; (6) Max Planck Institute for Solar System Research, Göttingen, Germany; (7) Max-Planck-Institute für Astronomie, Heidelberg, Germany; (8) Zhejiang University, Hangzhou, China; (9) University of Science and Technology of China, Hefei, China; (10) Taiyuan University of Technology, Taiyuan, China; (11) University of Maryland, College Park; MD, United States; (12) Boston University, Boston; MA, United States; (13) Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Xinjiang, China; (14) Huazhong University of Science and Technology, Wuhan, China; (15) Purple Mountain Observatories, Chinese Academy of Sciences, Nanjing, China; (16) Guizhou University, Guiyang, China; (17) National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China; (18) Yunnan University, Kunming, China; (19) Tel Aviv University, Tel Aviv, Israel; (20) Science Talent Training Center, Gainesville, United States; (21) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, China; (22) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'An, China; (23) Innovation Academy for Microsatellites, Chinese Academy of Sciences, Shanghai, China; (24) Department of Astronomy, The University of Geneva, Versoix, Switzerland; (25) University of Southern Queensland, QLD, Australia; (26) Research School of Astronomy & Astrophysics, Australian National University, ACT, Australia; (27) Research School of Computer Science, Australian National University, ACT, Australia; (28) Beijing Normal University, Beijing, China; (29) University of Cambridge, Cambridge, United Kingdom; (30) Dezhou University, Dezhou, China; (31) Jimei University, Xiamen, China; (32) Ohio State University, Columbus; OH, United States; (33) Korea Astronomy and Space Science Institute, Daejon, Korea, Republic of; (34) Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing, China; (35) Center for Astrophysics, Harvard & Smithsonian, Cambridge; MA, United States; (36) Weizmann Institute of Science, Rehovot, Israel; (37) Columbia University, New York; NY, United States; (38) American Museum of Natural History, Central Park West, Manhattan; NY, United States; (39) Irap, Université de Toulouse, Cnrs, Cnes, Ups, Toulouse, France; (40) Shanxi University, Taiyuan; 030006, China; (41) Nasa Ames Research Center, Moffett Field; CA, United States; (42) University of Nevada, Las Vegas; NV; 89118, United States; (43) Xinjiang Technical Institute of Physics and Chemistry, Cas, Urumqi, China; (44) School of Physics, Peking University, Beijing, China; (45) University of California, Davis, United States; (46) Beijing Planetarium, Beijing Academy of Science and Technology, Beijing, China; (47) Xi'an Jiaotong University, Xi'An, China; (48) Shaoguan University, Shaoguan; 512005, China; (49) Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW; 2006, Australia; (50) Institut für Physik, Karl-Franzens Universität Graz, Graz, Austria; (51) Instituto de Astrofísica e Ciências Do Espaço, Universidade Do Porto, Porto, Portugal; (52) Departamento de Física e Astronomia, Faculdade de Ciências, Da Universidade Do Porto, Porto, Portugal; (53) School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom; (54) Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark; (55) Kavli Institute for Theoretical Physics, University of California, Santa Barbara; CA, United States; (56) Aim, Cea, Cnrs, Université Paris-Saclay, Université de Paris, Sorbonne Paris Cité, France; (57) Institut für Astrophysik, Georg-August-Universität Göttingen, Göttingen, Germany; (58) Center for Space Science, Nyuad Institute, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates; (59) Landessternwarte Königstuhl (LSW), Heidelberg University, Königstuhl 12, Heidelberg; 69117, Germany; (60) Heidelberg Institute for Theoretical Studies (HITS) GGmbH, Heidelberg, Germany; (61) Institute for Astronomy, University of Hawai;i, 2680 Woodlawn Drive, Honolulu; HI; 96822, United States; (62) Inaf - Osservatorio Astrofisico di Torino, via Osservatorio 20, (TO), Pino Torinese; 10025, Italy; (63) Yunnan Observatories, Chinese Academy of Sciences, Kunming, China; (64) Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China; (65) Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, China; (66) University of Chinese Academy of Sciences, Beijing; 100049, China; (67) Instituto de Astrofísica de Canarias (IAC), Tenerife, La Laguna; 38205, Spain; (68) Universidad de la Laguna (ULL), Departamento de Astrofísica, Tenerife, La Laguna; 38206, Spain; (69) Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada; 18008, Spain; (70) Dipartimento di Fisica e Astronomia Augusto Righi, Università Degli Studi di Bologna, Bologna, Italy; (71) INAF-Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna, Bologna, Italy; (72) Lesia, Observatoire de Paris, Psl Research University, Cnrs, Sorbonne Université, Université Paris Diderot, Meudon; 92195, France; (73) Department of Astronomy, Yale University, 52 Hillhouse Ave., New Haven; CT; 06511, United States; (74) School of Physics, University of New South Wales, NSW; 2052, Australia; (75) Institute of Astronomy, Ku Leuven, Celestijnenlaan 200D, Leuven; B-3001, Belgium; (76) Centre for Astrophysics, University of Southern Queensland, Toowoomba; QLD; 4350, Australia; (77) Royal Observatory of Belgium, Ringlaan 3, Brussel; B-1180, Belgium; (78) Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Konkoly Thege Miklós út 15-17, Budapest; H-1121, Hungary; (79) Elte Eötvös Loránd University, Institute of Physics, Pázmány Péter sétány 1/A, Budapest; 1117, Hungary
Source title:arXiv
Abbreviated source title:arXiv
Issue date:June 14, 2022
Publication year:2022
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">The ET mission is a wide-field and ultra-high-precision photometric survey mission being developed in China. This mission is designed to measure, for the first time, the occurrence rate and the orbital distributions of Earth-sized planets. ET consists of seven 30 cm telescopes to be launched to the Earth-Sun's L2 point. Six of these are transit telescopes with a FOV of 500 square degrees. Staring in the direction that encompasses the original Kepler field for four continuous years, this monitoring will yield tens of thousands of transiting planets, including the elusive Earth twins orbiting solar-type stars. The seventh is a 30 cm microlensing telescope that will monitor an area of 4 square degrees toward the galactic bulge. Combined with simultaneous ground-based KMTNet observations, it will measure masses of hundreds of long-period and free-floating planets. Together, the transit and the microlensing telescopes will revolutionize our understanding of terrestrial planets across a large swath of orbital distances and free space. In addition, the survey data will also facilitate studies in the fields of asteroseismology, Galactic archaeology, time-domain sciences, and black holes in binaries.<br/></div> © 2022, CC BY-NC-ND.
Number of references:726
Main heading:Planets
Controlled terms:Orbits - Stars - Surveys - Telescopes
Uncontrolled terms:Free-floating planets - Galactic bulge - Ground based - High-precision - Micro-lensing - Orbitals - Photometrics - Solar type stars - Ultra-high - Wide-field
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena
Numerical data indexing:Size 3.00E-01m
DOI:10.48550/arXiv.2206.06693
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2206.06693v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
<RECORD 495>
Accession number:20225113256982
Title:The Plastic Scintillator Detector of the HERD space mission
Authors:Kyratzis, D. (1, 2); Alemanno, F. (1, 2); Altomare, C. (3, 4); Barbato, F.C.T. (1, 2); Bernardini, P. (5, 6); Cattaneo, P.W. (7); De Mitri, I. (1, 2); de Palma, F. (5, 6); Di Venere, L. (3, 4); Di Santo, M. (1, 2); Fusco, P. (3, 4); Gargano, F. (4); Loparco, F. (3, 4); Loporchio, S. (4); Marsella, G. (8); Mazziotta, M.N. (4); Pantaleo, F.R. (3, 4); Parenti, A. (1, 2); Pillera, R. (3, 4); Rappoldi, A. (7); Raselli, G. (7); Rossella, M. (7); Serini, D. (4); Silveri, L. (1, 2); Surdo, A. (6); Wu, L. (1, 2); Adriani, O. (34); Aloisio, R. (35, 36); Ambrosi, G. (40); An, Q. (18); Antonelli, M. (51); Azzarello, P. (43); Bai, L. (16); Bai, Y.L. (11); Bao, T.W. (9); Barbanera, M. (40); Berti, E. (34); Bertucci, B. (41); Bi, X.J. (9); Bigongiari, G. (42); Bongi, M. (34); Bonvicini, V. (51); Bordas, P. (46); Bosch-Ramon, V. (46); Bottai, S. (33); Brogi, P. (42); Cadoux, F. (43); Campana, D. (38); Cao, W.W. (11); Cao, Z. (9); Casaus, J. (45); Catanzani, E. (41); Chang, J. (17, 21); Chang, Y.H. (29); Chen, G.M. (9); Chen, Y. (23); Cianetti, F. (41); Comerma, A. (46, 47); Cortis, D. (37); Cui, X.H. (21); Cui, X.Z. (9); Dai, C. (13); Dai, Z.G. (23); D'Alessandro, R. (34); De Gaetano, S. (32); Di Felice, V. (56); Di Giovanni, A. (35, 36); Dong, J.N. (14, 15); Dong, Y.W. (9); Donvito, G. (31); Duranti, M. (40); D'Urso, D. (55); Evoli, C. (35, 36); Fang, K. (9); Fariña, L. (48); Favre, Y. (43); Feng, C.Q. (18); Feng, H. (24); Feng, H.B. (13); Feng, Z.K. (13); Finetti, N. (30); Formato, V. (56); Frieden, J.M. (50); Gao, J.R. (11); Gascon-Fora, D. (46); Gasparrini, D. (56); Giglietto, N. (32); Giovacchini, F. (45); Gomez, S. (46); Gong, K. (9); Gou, Q.B. (9); Guida, R. (52); Guo, D.Y. (9); Guo, J.H. (17); Guo, Y.Q. (9); He, H.H. (9); Hu, H.B. (9); Hu, J.Y. (9, 10); Hu, P. (9, 10); Hu, Y.M. (17); Huang, G.S. (18); Huang, J. (9); Huang, W.H. (14, 15); Huang, X.T. (14, 15); Huang, Y.B. (13); Huang, Y.F. (23); Ionica, M. (40); Jouvin, L. (48); Kotenko, A. (43); La Marra, D. (43); Li, M.J. (14, 15); Li, Q.Y. (14, 15); Li, R. (11); Li, S.L. (9, 10); Li, T. (14, 15); Li, X. (17); Li, Z. (25); Li, Z.H. (9, 10); Liang, E.W. (13); Liang, M.J. (9, 10); Liao, C.L. (16); Licciulli, F. (31); Lin, S.J. (9); Liu, D. (14, 15); Liu, H.B. (13); Liu, H. (16); Liu, J.B. (18); Liu, S.B. (18); Liu, X. (9, 10); Liu, X.W. (13); Liu, Y.Q. (9); Lu, X. (13); Lyu, J.G. (12); Lyu, L.W. (11); Maestro, P. (42); Mancini, E. (40); Manera, R. (46); Marin, J. (45); Marrocchesi, P.S. (42); Martinez, G. (45); Martinez, M. (48); Marzullo, D. (53); Mauricio, J. (46); Mocchiutti, E. (51); Morettini, G. (41); Mori, N. (33); Mussolin, L. (41); Oliva, A. (57); Orlandi, D. (37); Osteria, G. (38); Pacini, L. (33); Panico, B. (38); Papa, S. (52); Papini, P. (33); Paredes, J.M. (46); Pauluzzi, M. (41); Pearce, M. (49); Peng, W.X. (9); Perfetto, F. (38); Perrina, C. (50); Perrotta, G. (52); Pizzolotto, C. (51); Qiao, R. (9); Qin, J.J. (11)
Author affiliation:(1) Gran Sasso Science Institute (GSSI), Via Iacobucci 2, L'Aquila; 67100, Italy; (2) INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, L'Aquila; 67100, Italy; (3) Dipartimento di Fisica "M.Merlin", Università e del Politecnico di Bari, Bari; 70126, Italy; (4) INFN, Sezione di Bari, Bari; 70126, Italy; (5) Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Lecce; 73100, Italy; (6) INFN, Sezione di Lecce, Lecce; 73100, Italy; (7) INFN, Sezione di Pavia, Pavia; 27100, Italy; (8) Dipartimento di Fisica e Chimica "E. Segrè", Università degli Studi di Palermo, Palermo; 90133, Italy; (9) Key Laboratory of Particle and Astrophysics, Chinese Academy of Sciences, Beijing, China; (10) University of Chinese Academy of Sciences, Beijing, China; (11) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (12) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; (13) School of Physical Science and Technology, Guangxi University, Nanning, China; (14) Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China; (15) Key Laboratory of Particle Physics and Particle Irradiation, Ministry of Education, China; (16) School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, China; (17) Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing; 210023, China; (18) Department of Modern Physics, University of Science and Technology of China, Hefei, China; (19) Department of Astronomy, Yunan University, Kunming, China; (20) North Night Vision Technology Co. Ltd., Kunming, China; (21) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (22) Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, China; (23) School of Astronomy and Space Science, Nanjing University, Nanjing, China; (24) Department of Astronomy, Tsinghua University, Beijing, China; (25) Department of Astronomy, Peking University, Beijing, China; (26) Institute of Astrophysics, Central China Normal University, Wuhan, China; (27) Department of Physics, China University of Geosciences, Wuhan, China; (28) The University of Hong Kong, Hong Kong; (29) Institute of Physics, Academia Sinica, Taipei, Taiwan; (30) Universitá dell'Aquila, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (31) Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (32) Dipartimento di Fisica "M.Merlin", Univerisitá e del Politecnico di Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (33) Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (34) Universitá di Firenze, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (35) Gran Sasso Science Institute, L'Aquila, Italy; (36) INFN Laboratori Nazionali del Gran Sasso, Assergi, L'Aquila, Italy; (37) INFN Laboratori Nazionali del Gran Sasso, L'Aquila, Italy; (38) Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (39) Universitá di Napoli "Federico II", Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (40) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (41) Universitá degli Studi di Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (42) Universitá di Siena, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Pisa, Italy; (43) Département de Physique Nucléaire et Corpusculaire (DPNC), Université de Genève, Genève, Switzerland; (44) Department of Astronomy, University of Geneva, Geneva, Switzerland; (45) Centro de Investigaciones Energéticas Medioambientales y Tecnoló Gicas (CIEMAT), Madrid; E-28040, Spain; (46) Dept. Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Barcelona, Spain; (47) Universitat Pompeu Fabra (UPF), Barcelona, Spain; (48) Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Bellaterra, Barcelona; E-08193, Spain; (49) KTH Royal Institute of Technology, Stockholm, Sweden; (50) Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; (51) Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Trieste, Italy; (52) Universitá degli Studi di Napoli Federico II, Napoli, Italy; (53) Universitá degli Studi di Trieste, Italy; (54) Italian Space Agency, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (55) Universitá degli Studi di Sassari, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (56) Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, Rome, Italy; (57) INFN Sezione di Bologna, Bologna; 40126, Italy; (58) Universitá di Bologna, Bologna; 40126, Italy
Source title:Proceedings of Science
Abbreviated source title:Proc. Sci.
Volume:395
Part number:1 of 1
Issue title:37th International Cosmic Ray Conference, ICRC 2021
Issue date:March 18, 2022
Publication year:2022
Article number:054
Language:English
E-ISSN:18248039
Document type:Conference article (CA)
Conference name:37th International Cosmic Ray Conference, ICRC 2021
Conference date:July 12, 2021 - July 23, 2021
Conference location:Virtual, Berlin, Germany
Conference code:177942
Publisher:Sissa Medialab Srl
Abstract:<div data-language="eng" data-ev-field="abstract">The High Energy cosmic-Radiation (HERD) detector is one of the prominent space-borne instruments to be installed on-board the Chinese Space Station (CSS), around 2027. Primary scientific goals regarding this initiative include: precise measurements of cosmic ray (CR) energy spectra and mass composition, at energies up to the PeV range; contributions to high energy gamma-ray astronomy and transient studies; as well as indirect searches for Dark Matter (DM) particles via their possible annihilation/decay to detectable products. HERD is configured to accept incident particles from both its top and four lateral sides. Owing to its pioneering design, an order of magnitude increase in acceptance is foreseen, with respect to previous and ongoing experiments. The Plastic Scintillator Detector (PSD) constitutes an important sub-detector of HERD, particularly aimed towards anti-coincidence (discriminating incident photons from charged particles), while providing precise charge measurement of incoming cosmic-ray nuclei in a range of Z = 1-26. Main requirements concerning its design, include: high detection efficiency, broad dynamic range and good energy resolution. In order to select the optimal layout, two geometries are currently under investigation: one based on long scintillator bars and the other on square tiles, with both layouts being readout by Silicon Photomultipliers (SiPMs). Ongoing activities and future plans regarding the HERD PSD will be presented in this work.<br/></div> © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
Number of references:8
Main heading:Cosmic rays
Controlled terms:Charged particles - Cosmology - Gamma rays - Scintillation counters - Space stations
Uncontrolled terms:Cosmic ray energy spectrum - Energy - Gamma-ray astronomy - High energy gamma rays - Mass composition - Measurements of - Plastic scintillator detector - Precise measurements - Space missions - Space-borne instruments
Classification code:656.1 Space Flight - 657 Space Physics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics - 944.7 Radiation Measuring Instruments
Funding text:The author would like to thank all members of the HERD collaboration for supporting this work with valuable comments and fruitful discussions.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 496>
Accession number:20230113326372
Title:Gamma-ray performance study of the HERD payload
Authors:Adriani, O. (26); Alemanno, F. (27, 28); Aloisio, R. (27, 28); Altomare, C. (23); Ambrosi, G. (35); An, Q. (10); Antonelli, M. (46); Azzarello, P. (38); Bai, L. (8); Bai, Y.L. (3); Bao, T.W. (1); Barbanera, M. (35); Barbato, F.C.T. (27, 28); Bernardini, P. (31); Berti, E. (26); Bertucci, B. (36); Bi, X.J. (1); Bigongiari, G. (37); Bongi, M. (26); Bonvicini, V. (46); Bordas, P. (41); Bosch-Ramon, V. (41); Bottai, S. (25); Brogi, P. (37); Cadoux, F. (38); Campana, D. (32); Cao, W.W. (3); Cao, Z. (1); Casaus, J. (40); Catanzani, E. (36); Cattaneo, P.W. (34); Chang, J. (9, 13); Chang, Y.H. (21); Chen, G.M. (1); Chen, Y. (15); Cianetti, F. (36); Comerma, A. (41, 42); Cortis, D. (29); Cui, X.H. (13); Cui, X.Z. (1); Dai, C. (5); Dai, Z.G. (15); D'Alessandro, R. (26); De Gaetano, S. (24); De Mitri, I. (27, 28); de Palma, F. (31); Di Felice, V. (51); Di Giovanni, A. (27, 28); Di Santo, M. (27, 28); Di Venere, L. (24); Dong, J.N. (6, 7); Dong, Y.W. (1); Donvito, G. (23); Duranti, M. (35); D'Urso, D. (50); Evoli, C. (27, 28); Fang, K. (1); Fariña, L. (43); Favre, Y. (38); Feng, C.Q. (10); Feng, H. (16); Feng, H.B. (5); Feng, Z.K. (5); Finetti, N. (22); Formato, V. (51); Frieden, J.M. (45); Fusco, P. (24); Gao, J.R. (3); Gargano, F. (23); Gascon-Fora, D. (41); Gasparrini, D. (51); Giglietto, N. (24); Giovacchini, F. (40); Gomez, S. (41); Gong, K. (1); Gou, Q.B. (1); Guida, R. (47); Guo, D.Y. (1); Guo, J.H. (9); Guo, Y.Q. (1); He, H.H. (1); Hu, H.B. (1); Hu, J.Y. (1, 2); Hu, P. (1, 2); Hu, Y.M. (9); Huang, G.S. (10); Huang, J. (1); Huang, W.H. (6, 7); Huang, X.T. (6, 7); Huang, Y.B. (5); Huang, Y.F. (15); Ionica, M. (35); Jouvin, L. (43); Kotenko, A. (38); Kyratzis, D. (27, 28); La Marra, D. (38); Li, M.J. (6, 7); Li, Q.Y. (6, 7); Li, R. (3); Li, S.L. (1, 2); Li, T. (6, 7); Li, X. (9); Li, Z. (17); Li, Z.H. (1, 2); Liang, E.W. (5); Liang, M.J. (1, 2); Liao, C.L. (8); Licciulli, F. (23); Lin, S.J. (1); Liu, D. (6, 7); Liu, H.B. (5); Liu, H. (8); Liu, J.B. (10); Liu, S.B. (10); Liu, X. (1, 2); Liu, X.W. (5); Liu, Y.Q. (1); Loparco, F. (24); Loporchio, S. (23); Lu, X. (5); Lyu, J.G. (4); Lyu, L.W. (3); Maestro, P. (37); Mancini, E. (35); Manera, R. (41); Marin, J. (40); Marrocchesi, P.S. (37); Marsella, G. (54, 55); Martinez, G. (40); Martinez, M. (43); Marzullo, D. (48); Mauricio, J. (41); Mocchiutti, E. (46); Morettini, G. (36); Mori, N. (25); Mussolin, L. (36); Nicola Mazziotta, M. (23); Oliva, A. (52); Orlandi, D. (29); Osteria, G. (32); Pacini, L. (25); Panico, B. (32); Pantaleo, F.R. (24); Papa, S. (47); Papini, P. (25); Paredes, J.M. (41); Parenti, A. (27, 28); Pauluzzi, M. (36); Pearce, M. (44); Peng, W.X. (1); Perfetto, F. (32); Perrina, C. (45); Perrotta, G. (47); Pillera, R. (24); Pizzolotto, C. (46); Qiao, R. (1); Qin, J.J. (3); Quadrani, L. (52, 53); Quan, Z. (1); Rappoldi, A. (34); Raselli, G. (34); Ren, X.X. (6, 7); Renno, F. (47); Ribo, M. (41)
Author affiliation:(1) Key Laboratory of Particle and Astrophysics, Chinese Academy of Sciences, Beijing, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (4) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; (5) School of Physical Science and Technology, Guangxi University, Nanning, China; (6) Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China; (7) Key Laboratory of Particle Physics and Particle Irradiation, Ministry of Education, China; (8) School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, China; (9) Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing; 210023, China; (10) Department of Modern Physics, University of Science and Technology of China, Hefei, China; (11) Department of Astronomy, Yunan University, Kunming, China; (12) North Night Vision Technology co. ltd., Kunming, China; (13) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (14) Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, China; (15) School of Astronomy and Space Science, Nanjing University, Nanjing, China; (16) Department of Astronomy, Tsinghua University, Beijing, China; (17) Department of Astronomy, Peking University, Beijing, China; (18) Institute of Astrophysics, Central China Normal University, Wuhan, China; (19) Department of Physics, China University of Geosciences, Wuhan, China; (20) The University of Hong Kong, Hong Kong; (21) Institute of Physics, Academia Sinica, Taipei, Taiwan; (22) Universitá dell'Aquila, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (23) Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (24) Dipartimento di Fisica "M.Merlin", Univerisitá e del Politecnico di Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (25) Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (26) Universitá di Firenze, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (27) Gran Sasso Science Institute, L'Aquila, Italy; (28) INFN Laboratori Nazionali del Gran Sasso, L'Aquila, Assergi, Italy; (29) INFN Laboratori Nazionali del Gran Sasso, L'Aquila, Italy; (30) Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Lecce, Italy; (31) Universitá del Salento, Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Lecce, Italy; (32) Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (33) Universitá di Napoli "Federico II", Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (34) Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Pavia, Italy; (35) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (36) Universitá degli Studi di Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (37) Universitá di Siena, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Pisa, Italy; (38) Département de Physique Nucléaire et Corpusculaire (DPNC), Université de Genève, Genève, Switzerland; (39) Department of Astronomy, University of Geneva, Geneva, Switzerland; (40) Centro de Investigaciones Energéticas, Medioambientales y Tecnoló gicas (CIEMAT), Madrid; E-28040, Spain; (41) Dept. Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Barcelona, Spain; (42) Universitat Pompeu Fabra (UPF), Barcelona, Spain; (43) Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Bellaterra, Barcelona; E-08193, Spain; (44) KTH Royal Institute of Technology, Stockholm, Sweden; (45) Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; (46) Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Trieste, Italy; (47) Universitá degli Studi di Napoli Federico II, Napoli, Italy; (48) Universitá degli Studi di Trieste, Italy; (49) Italian Space Agency, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (50) Universitá degli Studi di Sassari, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (51) Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, Rome, Italy; (52) INFN Sezione di Bologna, Bologna; 40126, Italy; (53) Universitá di Bologna, Bologna; 40126, Italy; (54) Dipartimento di Fisica e Chimica "E. Segrè", Universitá degli Studi di Palermo, Palermo, Italy; (55) INFN sez. Catania, Catania, Italy
Source title:Proceedings of Science
Abbreviated source title:Proc. Sci.
Volume:395
Part number:1 of 1
Issue title:37th International Cosmic Ray Conference, ICRC 2021
Issue date:March 18, 2022
Publication year:2022
Article number:651
Language:English
E-ISSN:18248039
Document type:Conference article (CA)
Conference name:37th International Cosmic Ray Conference, ICRC 2021
Conference date:July 12, 2021 - July 23, 2021
Conference location:Virtual, Berlin, Germany
Conference code:177942
Publisher:Sissa Medialab Srl
Abstract:<div data-language="eng" data-ev-field="abstract">The High Energy cosmic-Radiation Detection (HERD) facility has been proposed as a space astronomy payload onboard the future China's Space Station. HERD is planned for operation starting around 2027 for about 10 years In addition to the unprecedented sensitivity for dark matter searches and cosmic-ray measurements up to the knee energy, it should perform gamma-ray monitoring and full sky survey from few hundred MeV up to tens of TeV. We present the first study of the HERD gamma-ray performance obtained with full simulations of the whole detector geometry. HERD will be a cubic detector composed with 5 active faces. We present a study conducted inside the HERD analysis software package, which includes a detailed description of the detector materials. In this work we present the HERD effective area, the point spread function and the resulting gamma-ray sensitivity.<br/></div> © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
Number of references:3
Main heading:Cosmic rays
Controlled terms:Cosmology - Gamma rays - Optical transfer function - Space stations
Uncontrolled terms:Dark matter searches - Detector geometry - Energy - Full simulations - Gamma-rays - Knee energy - Performance - Performance study - Radiation detection - Space astronomy
Classification code:656.1 Space Flight - 657 Space Physics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Age 1.00E+01yr
Funding details: Number: ESP2017-89979-P, Acronym: -, Sponsor: -;Number: -, Acronym: FSE, Sponsor: Faculty of Science and Engineering, University of Manchester;Number: PRE2019-091232, Acronym: MCIU, Sponsor: Ministerio de Ciencia, Innovación y Universidades;Number: -, Acronym: AEI, Sponsor: Agencia Estatal de Investigación;
Funding text:This work has received funding from the Spanish Ministerio de Ciencia, Innovación y Uni-versidades and the Agencia Estatal de Investigación through the program Subprograma Estatal de Generación del Conocimiento (ESP2017-89979-P) and from the FSE under the program Ayudas predoctorales of the Ministerio de Ciencia, Innovación y Universidades (PRE2019-091232)
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 497>
Accession number:20223712723895
Title:Emerging material platforms for integrated microcavity photonics
Authors:Liu, Jin (1); Bo, Fang (2); Chang, Lin (3); Dong, Chun-Hua (4); Ou, Xin (5); Regan, Blake (6); Shen, Xiaoqin (7); Song, Qinghai (8); Yao, Baicheng (9); Zhang, Wenfu (10); Zou, Chang-Ling (4); Xiao, Yun-Feng (11)
Author affiliation:(1) State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou; 510000, China; (2) MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin; 300071, China; (3) State Key Laboratory of Advanced Optical Communications System and Networks, School of Electronics, Peking University, Beijing; 100871, China; (4) CAS Key Lab of Quantum Information, University of Science and Technology of China, Hefei; 230026, China; (5) State Key Laboratory of Functional Material for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai; 200050, China; (6) School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo; 2007, Australia; (7) School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; (8) Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Harbin Institute of Technology, Shenzhen; 518055, China; (9) Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education), University of Electronic Science and Technology of China, Chengdu; 611731, China; (10) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (11) State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing; 100871, China
Corresponding authors:Liu, Jin(liujin23@mail.sysu.edu.cn); Bo, Fang(bofang@nankai.edu.cn); Chang, Lin(linchang@pku.edu.cn); Dong, Chun-Hua(chunhua@ustc.edu.cn); Zou, Chang-Ling(clzou321@ustc.edu.cn); Ou, Xin(ouxin@mail.sim.ac.cn); Regan, Blake(Blake.Regan@uts.edu.au); Shen, Xiaoqin(shenxq@shanghaitech.edu.cn); Song, Qinghai(qinghai.song@hit.edu.cn); Yao, Baicheng(yaobaicheng@uestc.edu.cn); Zhang, Wenfu(wfuzhang@opt.ac.cn); Xiao, Yun-Feng(yfxiao@pku.edu.cn)
Source title:Science China: Physics, Mechanics and Astronomy
Abbreviated source title:SCI. CHINA Phys. Mech. Astron.
Volume:65
Issue:10
Issue date:October 2022
Publication year:2022
Article number:104201
Language:English
ISSN:16747348
E-ISSN:18691927
Document type:Journal article (JA)
Publisher:Science Press (China)
Abstract:<div data-language="eng" data-ev-field="abstract">Many breakthroughs in technologies are closely associated with the deep understanding and development of new material platforms. As the main material used in microelectronics, Si also plays a leading role in the development of integrated photonics. The indirect bandgap, absence of χ<sup>(2)</sup> nonlinearity and the parasitic nonlinear absorptions at the telecom band of Si imposed technological bottlenecks for further improving the performances and expanding the functionalities of Si microcavities in which the circulating light intensity is dramatically amplified. The past two decades have witnessed the burgeoning of the novel material platforms that are compatible with the complementary metal-oxide-semiconductor (COMS) process. In particular, the unprecedented optical properties of the emerging materials in the thin film form have resulted in revolutionary progress in microcavity photonics. In this review article, we summarize the recently developed material platforms for integrated photonics with the focus on chip-scale microcavity devices. The material characteristics, fabrication processes and device applications have been thoroughly discussed for the most widely used new material platforms. We also discuss open challenges and opportunities in microcavity photonics, such as heterogeneous integrated devices, and provide an outlook for the future development of integrated microcavities.<br/></div> © 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:252
Main heading:Microcavities
Controlled terms:CMOS integrated circuits - Metals - Microelectronics - MOS devices - Nonlinear optics - Optical properties - Oxide semiconductors - Photonics - Silicon
Uncontrolled terms:Complementary metal oxide semiconductor process - Emerging materials - Integrated photonics - Light intensity - Nonlinear absorptions - Novel materials - Parasitics - Performance - Telecom bands - Thin-films
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1 Semiconducting Materials - 714 Electronic Components and Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems
DOI:10.1007/s11433-022-1957-3
Funding details: Number: 61234003,61434004,61504141, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: KJZD-EW-L11-04, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Natural Science Foundation of China (Grant Nos. 61234003, 61434004, and 61504141), National Key Research and Development Program of China, and CAS Interdisciplinary Project (Grant No. KJZD-EW-L11-04).
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 498>
Accession number:20225113275758
Title:The High Energy cosmic-Radiation Detector (HERD) Trigger System
Authors:Velasco, M.A. (1, 45); Bao, T. (2); Berti, E. (3); Bonvicini, V. (4); Casaus, J. (1); Giovacchini, F. (1); Liu, X. (2); Marco, R. (1); Marín, J. (1); Martínez, G. (1); Mori, N. (3); Oliva, A. (5); Pacini, L. (3); Quan, Z. (2); Tang, Z. (2); Xu, M. (2); Zampa, G. (4); Zampa, N. (4); Adriani, O. (31); Alemanno, F. (32, 33); Aloisio, R. (32, 33); Altomare, C. (28); Ambrosi, G. (40); An, Q. (15); Antonelli, M. (51); Azzarello, P. (43); Bai, L. (13); Bai, Y.L. (8); Bao, T.W. (6); Barbanera, M. (40); Barbato, F.C.T. (32, 33); Bernardini, P. (36); Bertucci, B. (41); Bi, X.J. (6); Bigongiari, G. (42); Bongi, M. (31); Bordas, P. (46); Bosch-Ramon, V. (46); S., Bottai; P., Brogi; F., Cadoux; D., Campana; W.W., Cao; Z., Cao; E., Catanzani; P.W., Cattaneo; J., Chang; Y.H., Chang; G.M., Chen; Y., Chen; F., Cianetti; A., Comerma; D., Cortis; X.H., Cui; X.Z., Cui; C., Dai; Z.G., Dai; R., D'Alessandro; S., De Gaetanoe; I., De Mitri; F., de Palma; V., Di Felice; A., Di Giovanni; M., Di Santo; L., Di Venere; J.N., Dong; Y.W., Dong; G., Donvito; M., Duranti; D., D'Urso; C., Evoli; K., Fang; L., Fariña; Y., Favre; C.Q., Feng; H., Feng; H.B., Feng; Z.K., Feng; N., Finetti; V., Formato; J.M., Frieden; P., Fusco; J.R., Gao; F., Gargano; D., Gascon-Fora; D., Gasparrini; N., Giglietto; S., Gomez; K., Gong; Q.B., Gou; R., Guida; D.Y., Guo; J.H., Guo; Y.Q., Guo; H.H., He; H.B., Hu; J.Y., Hu; P., Hu; Y.M., Hu; G.S., Huang; J., Huang; W.H., Huang; X.T., Huang; Y.B., Huang; Y.F., Huang; M., Ionica; L., Jouvin; A., Kotenko; D., Kyratzis; D., La Marra; M.J., Li; Q.Y., Li; R., Li; S.L., Li; T., Li; X., Li; Z., Li; Z.H., Li; E.W., Liang; M.J., Liang; C.L., Liao; F., Licciulli; S.J., Lin; D., Liu; H.B., Liu; H., Liu; J.B., Liu; S.B., Liu; X.W., Liu; Y.Q., Liu; F., Loparco; S., Loporchio; X., Lu; J.G., Lyu; L.W., Lyu; P., Maestro; E., Mancini; R., Manera; P.S., Marrocchesi; G., Marsella; M., Martinez; D., Marzullo; J., Mauricio; E., Mocchiutti; G., Morettini; L., Mussolin; M., Nicola Mazziotta; D., Orlandi; G., Osteria; B., Panico; F.R., Pantalei; S., Papa; P., Papini; J.M., Paredes; A., Parenti; M., Pauluzzi; M., Pearce; W.X., Peng; F., Perfetto; C., Perrina; G., Perrotta; R., Pillera; C., Pizzolotto; R., Qiao
Author affiliation:(1) Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Avda. Complutense 40, Madrid; E-28040, Spain; (2) Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (3) Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Firenze, Via G. Sansone 1, Florence, Sesto Fiorentino; I-50019, Italy; (4) Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste, Padriciano 99, Trieste; I-34012, Italy; (5) Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bologna, Viale Carlo Berti Pichat, 6/2, BO, Bologna; 40127, Italy; (6) Key Laboratory of Particle and Astrophysics, Chinese Academy of Sciences, Beijing, China; (7) University of Chinese Academy of Sciences, Beijing, China; (8) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (9) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China; (10) School of Physical Science and Technology, Guangxi University, Nanning, China; (11) Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China; (12) Key Laboratory of Particle Physics and Particle Irradiation, Ministry of Education, China; (13) School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, China; (14) Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing; 210023, China; (15) Department of Modern Physics, University of Science and Technology of China, Hefei, China; (16) Department of Astronomy, Yunan University, Kunming, China; (17) North Night Vision Technology Co. Ltd., Kunming, China; (18) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100101, China; (19) Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, China; (20) School of Astronomy and Space Science, Nanjing University, Nanjing, China; (21) Department of Astronomy, Tsinghua University, Beijing, China; (22) Department of Astronomy, Peking University, Beijing, China; (23) Institute of Astrophysics, Central China Normal University, Wuhan, China; (24) Department of Physics, China University of Geosciences, Wuhan, China; (25) The University of Hong Kong, Hong Kong; (26) Institute of Physics, Academia Sinica, Taipei, Taiwan; (27) Universitá dell'Aquila, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (28) Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (29) Dipartimento di Fisica "M.Merlin", Univerisitá e del Politecnico di Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari, Italy; (30) Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (31) Universitá di Firenze, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Firenze, Italy; (32) Gran Sasso Science Institute, L'Aquila, Italy; (33) INFN, Laboratori Nazionali del Gran Sasso, Assergi, L'Aquila, Italy; (34) INFN, Laboratori Nazionali del Gran Sasso, L'Aquila, Italy; (35) Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Lecce, Italy; (36) Universitá del Salento, Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Lecce, Italy; (37) Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (38) Universitá di Napoli "Federico II", Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy; (39) Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Pavia, Italy; (40) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (41) Universitá degli Studi di Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (42) Universitá di Siena, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Pisa, Italy; (43) Département de Physique Nucléaire et Corpusculaire (DPNC), Université de Genève, Genève, Switzerland; (44) Department of Astronomy, University of Geneva, Geneva, Switzerland; (45) Centro de Investigaciones Energéticas Medioambientales y Tecnoló Gicas (CIEMAT), Madrid; E-28040, Spain; (46) Dept. Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Barcelona, Spain; (47) Universitat Pompeu Fabra (UPF), Barcelona, Spain; (48) Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Bellaterra, Barcelona; E-08193, Spain; (49) KTH Royal Institute of Technology, Stockholm, Sweden; (50) Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; (51) Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Trieste, Italy; (52) Universitá degli Studi di Napoli Federico II, Napoli, Italy; (53) Universitá degli Studi di Trieste, Italy; (54) Italian Space Agency, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (55) Universitá degli Studi di Sassari, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, Italy; (56) Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, Rome, Italy; (57) INFN Sezione di Bologna, Bologna; 40126, Italy; (58) Universitá di Bologna, Bologna; 40126, Italy; (59) Dipartimento di Fisica e Chimica "E. Segrè", Universitá degli Studi di Palermo, Palermo, Italy; (60) INFN sez. Catania, Catania, Italy
Source title:Proceedings of Science
Abbreviated source title:Proc. Sci.
Volume:395
Part number:1 of 1
Issue title:37th International Cosmic Ray Conference, ICRC 2021
Issue date:March 18, 2022
Publication year:2022
Article number:062
Language:English
E-ISSN:18248039
Document type:Conference article (CA)
Conference name:37th International Cosmic Ray Conference, ICRC 2021
Conference date:July 12, 2021 - July 23, 2021
Conference location:Virtual, Berlin, Germany
Conference code:177942
Publisher:Sissa Medialab Srl
Abstract:<div data-language="eng" data-ev-field="abstract">The High Energy cosmic-Radiation Detection (HERD) facility is a next generation spaceborne detector to be installed onboard the Chinese Space Station for about 10 years. HERD will address major problems in fundamental physics and astrophysics, providing precise measurements of charged-cosmic rays up to PeV energies, performing indirect searches for dark matter in the electron spectrum up to few tens of TeV and monitoring the gamma-ray skymap for surveys and transient searches. HERD is composed of a 3D imaging calorimeter (CALO) surrounded by a scintillating fiber tracker (FIT), a plastic scintillator detector (PSD) and a silicon charge detector (SCD). In addition, a transition radiation detector (TRD) is placed on a lateral side to provide accurate energy calibration. Based on this innovative design, the effective geometric factor of HERD will be one order of magnitud larger than that of current space-based detectors. The HERD trigger strategy is designed to accomplish the scientific goals of the mission, and is based on trigger definitions that rely on the energy deposited in CALO and the PSD. The trigger performances are evaluated using a detailed Monte Carlo simulation that includes the latest HERD geometry. In addition, alternative trigger definitions based on the event topology can be established thanks to the photodiode readout of CALO crystals. The feasibility of these topological triggers is also investigated and presented.<br/></div> © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)
Number of references:5
Main heading:Cosmic rays
Controlled terms:Cosmology - Gamma rays - Intelligent systems - Monte Carlo methods - Space stations - Tellurium compounds - Topology
Uncontrolled terms:Dark matter - Electron spectrum - Energy - Fundamental physics - Measurements of - Plastic scintillator detector - Precise measurements - Radiation detection - Space-borne - Trigger systems
Classification code:656.1 Space Flight - 657 Space Physics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 723.4 Artificial Intelligence - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Age 1.00E+01yr
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
<RECORD 499>
Accession number:20224413019007
Title:The enhanced X-ray Timing and Polarimetry mission – eXTP: an update on its scientific cases, mission profile and development status (Open Access)
Authors:Zhang, Shuang-Nan (1); Santangelo, Andrea (2); Xu, Yupeng (1); Feroci, Marco (3, 4); Hernanz, Margarita (5, 6); Lu, Fangjun (1); Chen, Yong (1); Feng, Hua (7); Nandra, Kirpal (8); Jiang, Weichun (1); Svoboda, Jiri (9); Brandt, Søren (10); Schanne, Stéphane (11); Zand, Jean (12); Michalska, Malgorzata (13); Bozzo, Enrico (14); Kalemci, Emrah (15); Agudo, Ivan (16); Ahangarianabhari, Mahdi (17); Aitink-Kroes, Gabby (12); Ambrosi, Giovanni (18); Ambrosino, Filippo (3); An, Zhenghua (1); Perez Torres, Miguel Angel (16); Antonelli, Matias (19); Argan, Andrea (3, 20); Babinec, Viktor (21); Baldini, Luca (22); Barbera, Marco (23, 24); van Baren, Coen (12); Baudin, David (11); Bayer, Jörg (2); Bellazzini, Ronaldo (22); Bellutti, Pierluigi (25); Bertucci, Bruna (26); Bertuccio, Giuseppe (17); Bi, Xingzi (27); Boezio, Mirko (19); Bonvicini, Valter (19); Bonvicini, Walter (19); Bordas, Pol (28); Borghese, Alice (5, 6); Borghi, Giacomo (25); Bouyjou, Florent (11); Bozkurt, Ayhan (15); Brez, Alessandro (22); Brienza, Daniele (29); Cadoux, Franck (30); Campana, Riccardo (31); Cao, Jiewei (1); Cao, Xuelei (1); Casares, Jorge (32); Cavazzuti, Elisabetta (29); Ceraudo, Francesco (3); Chen, Tianxiang (1); Chen, Wen (27); Chen, Can (1); Chen, Yupeng (1); Chen, Xin (27); Chen, Yehai (27); Chenevez, Jerome (10); Cheng, Yaodong (1); Cirrincione, Daniela (19, 33); Civitani, Marta (34); Cong, Min (1); Zelati, Francesco Coti (5, 6); Cui, Weiwei (1); Cui, Tao (1); Cui, Wei (7); Dai, Boyu (1); Dauser, Thomas (35); De Angelis, Nicolas (30); De Marco, Barbara (36); De Rosa, Alessandra (3); Monte, Ettore Del (3, 4); Cosimo, Sergio Di (3); Diebold, Sebastian (2); Dilillo, Giuseppe (3); Ding, Fei (37); Dohnal, Roman (21); Dong, Zefang (1); Donnarumma, Immacolata (29); Dovciak, Michal (9); Du, Yuanyuan (1); Ducci, Lorenzo (2); Evangelista, Yuri (3, 4); Fan, Qingmei (38); Favre, Yannick (30); Ferrés, Patrícia (5, 6); Fiandrini, Emanuele (26); Ficorella, Francesco (25); Fuschino, Fabio (31); Gálvez, José Luis (5, 6); Gao, Na (1); Gao, Min (1); Ge, Yuqiang (37); Ge, Mingyu (1); Gevin, Olivier (11); Grassi, Marco (39); Gu, Yudong (1); Gu, Quanying (38); Guan, Ju (1); Guedel, Manuel (40); Han, Xingbo (27); Han, Dawei (1); He, Huilin (1); He, Junwang (27); Hedderman, Paul (2); den Herder, Jan-Willem (12); Hong, Bin (38); Hormaetxe, Ander (5, 6); Hou, Dongjie (1); Hu, Zexun (41); Hu, Hao (1); Hu, Qingbao (1); Hu, Yu (1); Huang, Yue (1); Huang, Jiangjiang (27); Huang, Qiushi (42); Huo, Jia (1); Hynek, Richard (21); Iwasawa, Kazumi (28); Izzo, Lucca (16); Ji, Long (43); Jia, Shumei (1); Jiang, Bowen (41); Jiang, Wei (37); Jiang, Jiechen (1); Jiang, Xiaowei (1); Jiao, Yang (1); Jin, Ge (41); Jin, Fan (37); Jose, Jordi (36); Karas, Vladimir (9); Kennedy, Thomas (44); Kirsch, Christian (35); Kole, Merlin (30); Komarek, Martin (21); Kreykenbohm, Ingo (35); Kuiper, Lucien (12); Kuvvetli, Irfan (10); Labanti, Claudio (31); Latronico, Luca (45); Laubert, Phillip (12); Li, Tao (41); Li, Longhui (41); Li, Hong (7); Li, Duo (37)
Author affiliation:(1) Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing; 100049, China; (2) Institut für Astronomie und Astrophysik, Eberhard Karls Universität, Tübingen; 72076, Germany; (3) INAF, Istituto di Astrofisica e Planetologia Spaziali, Via Fosso del Cavaliere 100, Rome; 00133, Italy; (4) INFN, Sezione Roma Tor Vergata, Via della Ricerca Scientifica, Rome; 00133, Italy; (5) Institute of Space Sciences (ICE-CSIC), Campus UAB, Carrer de can Magrans, s/n, Cerdanyola de Vallès, Barcelona; 08193, Spain; (6) Institut d’Estudis Espacials de Catalunya (IEEC), Barcelona, Spain; (7) Department of Engineering Physics, Center for Astrophysics, Tsinghua University, Beijing; 100084, China; (8) Max Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, Garching; 85748, Germany; (9) Astronomical Institute, Czech Academy of Sciences, Bocni II 1401, Prague; CZ-14100, Czech Republic; (10) DTU-Space, Technical University of Denmark, Lyngby, Denmark; (11) CEA Paris-Saclay, DRF/IRFU, Gif sur Yvette; 91191, France; (12) SRON Netherlands Institute for Space Research, CA, Leiden; NL-2333, Netherlands; (13) Space Research Center, Polish Academy of Sciences, Bartycka 18a, Warszawa; 00-716, Poland; (14) Department of Astronomy, University of Geneva, Chemin d’Ecogia 16, Versoix; 1290, Switzerland; (15) Sabanci University, Faculty of Engineering and Natural Sciences, Istanbul; 34956, Turkey; (16) Instituto de Astrofysíca de Andalucia - CSIC, Granada; 18008, Spain; (17) Politecnico di Milano, Polo di Como, Via Anzani 41, Como, Italy; (18) INFN, Sezione di Perugia, Via Alessandro Pascoli, 23c, Perugia; 06123, Italy; (19) INFN, Sezione di Trieste, Padriciano 99, 34149, Italy; (20) INAF, Viale del Parco Mellini 84, Rome; I-00136, Italy; (21) L.K. Engineering, s.r.o. Vídenská 55, Brno; 63900, Czech Republic; (22) Sezione di Pisa, Istituto Nazionale di Fisica Nucleare, Largo Bruno Pontecorvo, 3, Pisa; 56127, Italy; (23) Università di Palermo, Dipartimento di Fisica e Chmica, Via Archirafi 36, Palermo; 90123, Italy; (24) INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento, 1, Palermo; 90134, Italy; (25) Fondazione Bruno Kessler, Via Sommarive, Povo, Trento; 38123, Italy; (26) University of Perugia, Dip. Fisica e Geologia, Via Pascoli snc, Perugia; 06123, Italy; (27) Innovation Academy for Microsatellites of CAS, Xueyang Road No.1, Pudong district, Shanghai, China; (28) ICREA & Institut de Cíencies del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Barcelona; 08028, Spain; (29) Italian Space Agency, Via del Politecnico snc, Rome; 00133, Italy; (30) Department of Nuclear and Particle Physics, University of Geneva, CH-1205, Switzerland; (31) INAF, Osservatorio di astrofisica e scienza dello spazio di Bologna, Via P. Gobetti 101, Bologna, Italy; (32) Instituto de Astrofísica de Canarias, Tenerife; 38205, Spain; (33) University of Udine, Via delle Scienze, 206, Udine; 33100, Italy; (34) Osservatorio Astronomico di Brera, Istituto Nazionale di Astofisica, Via Brera, 28, Milano; 20121, Italy; (35) Remeis-Sternwarte & ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg, Sternwartstr. 7, Bamberg; 96049, Germany; (36) Universitat Politecnica de Catalunya (UPC-IEEC), Barcelona; 08034, Spain; (37) Center for Precision Engineering, Harbin Institute of Technology, Harbin; 150001, China; (38) Beijing Institute of Spacecraft System Engineering, CAST, Beijing; 10094, China; (39) University of Pavia, Department of Electrical, Computer, and Biomedical Engineering, Via Ferrata 5, Pavia; 27100, Italy; (40) Universität Wien, Universitätsring 1, Wien; 1010, Austria; (41) North Night Vision Technology Co. Ltd, Nanjing; 211106, China; (42) Key Laboratory of Advanced Material Microstructure of Education Ministry of China, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai; 200090, China; (43) School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai; 519082, China; (44) Mullard Space Science Laboratory, UCL, Holmbury St Mary, Dorking, Surrey; RH56NT, United Kingdom; (45) Sezione di Torino, Istituto Nazionale di Fisica Nucleare, Via Pietro Giuria, 1, Torino; 10125, Italy; (46) State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai; 200050, China; (47) Shanghai Industrial Technology Research Institute, Shanghai; 201800, China; (48) European Space Agency, Keplerlaan 1, PO Box 299, Noordwijk; NL-2200 AG, Netherlands; (49) Space Research Centre, Department of Physics and Astronomy, University of Leicester, Leicester; LE17RH, United Kingdom; (50) INAF, Osservatorio Astronomico di Cagliari, Via della Scienza 5, CA, Selargius; 09047, Italy; (51) Centro de Astrobiologia (CSIC-INTA), Dep. de Astrofsica, ESAC, Madrid; 28850, Spain; (52) Frentech Aerospace s.r.o. Jarní 48 CZ S, Brno; 614 00, Czech Republic; (53) Electrical and Electronic Engineering, Istanbul Technical University, Ayazaga Campus, Turkey; (54) Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Väisäläntie 20, Piikkiö; 21500, Finland; (55) Nordita, KTH Royal Institute of Technology, Stockholm University, SE, Stockholm; 10691, Sweden; (56) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (57) TIFPA, Istituto Nazionale di Fisica Nucleare, Via Sommarive 14, Povo, Trento; 38123, Italy; (58) School of Microelectronics, Shanghai University, Shanghai; 200444, China; (59) TÜBITAK-UZAY Space Technologies Research Institute, Ankara, Turkey; (60) Institute of Physics, Silesian University in Opava, Bezrucovo nam. 13, Opava; CZ-746 01, Czech Republic; (61) Anton Pannekoek Institute for Astronomy, University of Amsterdam, Amsterdam; 1098 XH, Netherlands; (62) State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin; 150006, China; (63) School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin; 150001, China; (64) Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, Warszawa; PL-00-716, Poland
Corresponding author:Zhang, Shuang-Nan(zhangsn@ihep.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12181
Part number:1 of 1
Issue title:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Issue date:2022
Publication year:2022
Article number:121811W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510653436
Document type:Conference article (CA)
Conference name:Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Conference date:July 17, 2022 - July 22, 2022
Conference location:Montreal, QC, United states
Conference code:183051
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The enhanced X-ray Timing and Polarimetry mission (eXTP) is a flagship observatory for X-ray timing, spectroscopy and polarimetry developed by an International Consortium. Thanks to its very large collecting area, good spectral resolution and unprecedented polarimetry capabilities, eXTP will explore the properties of matter and the propagation of light in the most extreme conditions found in the Universe. eXTP will, in addition, be a powerful X-ray observatory. The mission will continuously monitor the X-ray sky, and will enable multiwavelength and multi-messenger studies. The mission is currently in phase B, which will be completed in the middle of 2022.<br/></div> © 2022 SPIE. All rights reserved.
Number of references:35
Main heading:Polarimeters
Controlled terms:Black holes - Ellipsometry - Equations of state - Gamma rays - Gravitation - Interferometry - Observatories - Stars - Timing circuits
Uncontrolled terms:Black holes - Development status - Equation-of-state - Extreme density - Extreme gravity - Extreme magnetism - Mission profile - Neutron stars - X-ray polarimetry - X-ray timing
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 713.4 Pulse Circuits - 931.3 Atomic and Molecular Physics - 931.5 Gravitation, Relativity and String Theory - 932.1 High Energy Physics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.1117/12.2629340
Funding details: Number: 21-06825X, Acronym: GA ČR, Sponsor: Grantová Agentura České Republiky;Number: POIR.04.04.00-00-5C65/17, Acronym: FNP, Sponsor: Fundacja na rzecz Nauki Polskiej;Number: XDA15020100, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: BMWi, Sponsor: Bundesministerium für Wirtschaft und Technologie;Number: FKZ 50 OO 1902, Acronym: DLR, Sponsor: Deutsches Zentrum für Luft- und Raumfahrt;Number: 2020-3-HH.0, Acronym: ASI, Sponsor: Agenzia Spaziale Italiana;Number: -, Acronym: MICINN, Sponsor: Ministerio de Ciencia e Innovación;Number: PID2019-108709GB-I00, Acronym: AEI, Sponsor: Agencia Estatal de Investigación;
Funding text:The Chinese team acknowledges support by the Chinese Academy of Sciences through the Strategic Priority Research Program, Grant No. XDA15020100. The Italian authors acknowledge funding support by the Italian Space Agency (under agreement n. 2020-3-HH.0 and ASI-INAF n.2017-14-H.O) and INFN (project XRO - X-ray Observatories). The Spanish authors acknowledge funding support from the MICIN/AEI grant PID2019-108709GB-I00. The German team acknowledges support from the Bundesministerium für Wirtschaft und Tech-nologie through the Deutsches Zentrum f¨ur Luft-und Raumfahrt e.V. (DLR) under the grant number FKZ 50 OO 1902. The Polish team acknowledges FNP grant POIR.04.04.00-00-5C65/17. The Czech team acknowledges support from the GACR project 21-06825X. The Turkish team acknowledges support from the Turkish Space Agency.
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
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