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<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> &copy; 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 &mu;m 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> &copy;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> &copy; 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> &copy; 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> &copy; 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 &lsquo;Light of West China&rsquo; 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:&#22522;&#20110;InP/In<inf>1-</inf><inf>x</inf>Ga<inf>x</inf>As<inf>y</inf>P<inf>1-</inf><inf>y</inf>&#21152;&#36733;&#26465;&#29366;&#27874;&#23548;&#30340;&#23485;&#24102;&#27874;&#38271;&#36716;&#25442;&#25968;&#20540;&#30740;&#31350;
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&#65292; nonlinear integrated optical devices have shown great potential in all-optical signal processing&#65292; and a lot of research work has been done on them. The nonlinear integrated optical devices usually use silicon&#65292; &#8546;-&#8548;&#65292; chalcogenide glass and other materials platform. Silicon has very sophisticated low-cost manufacturing platforms&#65292; but silicon is an indirect band-gap list of semiconductor materials with very low luminous efficiency&#65292; and silicon needs to be integrated with other materials&#65292; for example&#65292; the integration of &#8546;-&#8548; lasers and amplifiers on a silicon substrate to achieve integrated optical path&#65292; which makes the integrated optical path complex and expensive&#65292; 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&#65292; but their refractive index can not be adjusted within a certain range&#65292; 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 &#65288;COMS&#65289; process&#65292; and the fabrication process is complex. Various ternary and quaternary &#8546;-&#8548; compounds with different bandgap wavelengths can form a group of nonlinear photonic materials that can cover the whole spectrum window from ultraviolet to infrared. &#8546;-&#8548;materials can improve the flexibility of custom-made integrated optical devices by changing the components of different materials&#65292; within a certain range. &#8546;-&#8548; semiconductor platforms enable active and passive integrated optical devices to be combined on the same material platform&#65292; which can be achieved by careful design and advanced manufacturing methods&#65292; for example&#65292; multilayer epitaxy and vertical coning. &#8546;-&#8548; semiconductor waveguides have high nonlinear coefficients&#65292; 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 &#8546;-&#8548; list of semiconductor materials can be reduced to 0.42 ps&#65292; which can reduce the nonlinear loss in the communication band and has the potential for efficient wavelength conversion. In this paper&#65292; 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 &mu;m to 1.59 &mu;m. The waveguide has good nonlinear optics characteristics with a high Kerr coefficient of 2.2&times;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&#65292; with the doping coefficient y decreasing&#65292; 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&#65292; the conversion bandwidth is increased. In addition&#65292; the peak conversion efficiency of the waveguide is increased by increasing the pump power while the pump power is kept constant&#65292; and the band of the Idle Light is redshifted with the redshift of the pump wavelength. At the same time&#65292; 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&#65292; optical sensing and other fields.<br/></div> &copy; 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 &#65288;No. 61505160&#65289;&#65292; the Innovation Capability Support Program of Shaanxi &#65288;No.2018KJXX&#8210;042&#65289;&#65292; the Natural Science Basic Research Program of Shaanxi &#65288;No. 2019JM&#8210;084&#65289;&#65292; State Key Laboratory of Transient Optics and Photonics &#65288;No.SKLST202108&#65289;&#65292;the Graduate Innovation and Practical Ability Training Project of Xi'an Shiyou University &#65288;No.YCS20211075&#65289;
 
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>&minus;1</sup>, in the frequency regime of 0.3&ndash;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 &minus;0.285 &plusmn; 0.02 ps/THz/cm The simulation and experimental results of transmission loss and dispersion are in good agreement within 0.3&ndash;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> &copy; 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> &copy; 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> &copy; 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> &copy; 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&#65288;Invited&#65289;
Title of translation:&#22522; &#20110; &#39134; &#31186; &#28608; &#20809; &#30340; &#36229; &#24555; &#22826; &#36203; &#20857; &#29305; &#24449; &#27874; &#35889; &#25216; &#26415; &#21450; &#20854;&#24212; &#29992;&#65288;&#29305; &#36992;&#65289;
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&#65288;THz&#65289;waves&#65288;0.1 THz ~ 10 THz&#65292;1 THz = 10<sup>12</sup> Hz&#65289;locate in the transitional region of the electromagnetic spectrum&#65292;between the classical electronics&#65288;radio&#65292;microwave and millimeter wave&#65289;and the photonics&#65288;infrared&#65292;visible&#65292;ultraviolet and x-ray&#65289;. As a kind of coherent measurement technology in THz frequency range&#65292;THz characteristic spectroscopy&#65292;with high sensitivity&#65292;rapidness and nondestructive testing as well as other unique advantages&#65292;has shown an attractive promising application prospect in detection&#65292;analysis and identification of biochemical molecules and materials. As the widely used broadband THz wave source&#65292;THz Photoconductive Antenna&#65288;THz-PCA&#65289;can emit broadband THz radiation. Therefore&#65292;as one of the promising THz emitters and detectors&#65292;THz-PCA has the advantages to overcome the defects confronted by other devices &#65288;e. g.&#65292;low operation frequency&#65292;strict working condition and bulk size&#65289;and these unique advantages have made THz-PCA become the most commonly utilized THz sources in THz Time-Domain Spectroscopy&#65288;THz-TDS&#65289;. Although a variety of THz-PCAs are commercially available and become indispensable in many practical applications currently&#65292; 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&#65292;the working mechanism and some new research progress&#65292;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&#65292;as well as the influence of several parameters including the power intensity of femtosecond pump laser&#65292;the laser pulse duration and the carrier lifetime of the substrate material&#65292;are also analyzed based on theoretical models&#65292;which provide the technical foundation for designing the efficient THz-PCA. Moreover&#65292;a plenty of valuable research schemes have been proposed to develop the THz technologies based on THz-PCA in the past decades&#65292;including photoconductive materials and structure design of THz-PCA. To be specific&#65292;the sub-picosecond carrier life time of photoconductor can be realized by creating a massive density of defects&#65292;dislocations and scattering centers in the substrate material. As for structure design of THz-PCA&#65292;the previous researches on THz-PCA was mainly focused on the saturation effect at high pump power and the large aperture dipoles&#65292;dipole arrays and interdigitated electrodes structures have been investigated during the early stage. In the recent years&#65292;as the quick development of micro-nano fabrication technologies&#65292;the THz-PCA incorporated with plasmonic nanostructures and all-dielectric nanostructures have also been widely investigated for improving its performances. In this paper&#65292;the working principle and development status of THz-PCAs based on ultrashort pulsed laser are introduced&#65292; including theoretical models&#65292; substrate materials and different structures of photoconductive antennas. Furthermore&#65292; with the dramatic development of source and detector components&#65292;THz spectroscopy technology has been utilized in various fields such as chemical detection and substance identification&#65292;biomedical application and pharmaceutical industry. THz-TDS is the most commonly used technique in current commercial THz spectroscopy&#65292;which has attracted wide attention for its spectral fingerprint&#65292;high temporal-spatial resolution&#65292;noninvasive and nonionizing properties. Various important biomolecules&#65292;such as amino acids&#65292;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&#65292;rotation and weak interaction with the surrounding molecules&#65288;hydrogen bonding&#65292;van der Waals force&#65292;etc.&#65289;&#65292;so they are very sensitive to the molecular structure and surrounding environment. It is a powerful tool to investigate molecular conformation&#65292; positional isomerism of functional groups&#65292;intermolecular interactions of organic acids and their salts&#65292;optical isomerism&#65292;etc. However&#65292;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&#65292;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&#65292;a practical strategy has been proposed by combining machine learning methods with THz-TDS for implementation of practical applications. Moreover&#65292;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&#65292;which is crucial for the practicability of clinical adoption. Furthermore&#65292;some recent progress we have achieved in THz characteristic spectral technology and its applications are also summarized and discussed.<br/></div> &copy; 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 &#65288;No. 61675230&#65289;&#65292;the"Hundred of Talents Programs"of Chinese Academy of Sciences&#65288;No. J08-029&#65289;&#65292;the Innovative Project of Chinese Academy of Sciences&#65288;No. YYYJ-1123-4&#65289;
 
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 &micro;J, 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 &micro;J 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> &copy; 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:&#20302;&#25439;&#32791;&#22823;&#24102;&#23485;&#21452;&#33455;&#36127;&#26354;&#29575;&#22826;&#36203;&#20857;&#20809;&#32420;&#20559;&#25391;&#20998;&#26463;&#22120;    (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 &plusmn;1% deviation of structural parameters.<br/></div> Copyright &copy; 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&rsquo; Creative Workstation of Xi&rsquo;an University of Posts and Telecommunications, China (Grant No. YJGJ201905). &dagger; 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:&#25530;Gd<sup>3+</sup>&#30340;LiYF<inf>4</inf>&#65306; Yb<sup>3+</sup>/Ho<sup>3+</sup>&#24494;&#31859;&#26230;&#20307;&#21046;&#22791;&#20197;&#21450;&#22312;&#38450;&#20266;&#20013;&#30340;&#24212;&#29992;&#30740;&#31350;
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> &copy; 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> &copy; 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> &copy; 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> &copy;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> &copy; 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 &times; 10<sup>6</sup> ppb are respectively 2.2 &times; 10<sup>&minus;3</sup> dB per ppb and 3.2 &times; 10<sup>&minus;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> &copy; 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> &copy; 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> &copy; 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> &copy; 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:&#32435;&#31186;&#33033;&#20914;&#28608;&#20809;&#35825;&#23548;&#30340;&#27700;&#20013;&#21452;&#31354;&#27873;&#25391;&#33633;&#30740;&#31350;
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 (&gamma;) (Fig. 4). For &gamma;=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 &gamma;&asymp;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 &gamma;&asymp;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 (&gamma;&lt;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> &copy; 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> &copy; 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:&#31354;&#22522;&#28608;&#20809;&#36890;&#20449;&#30740;&#31350;&#36827;&#23637;&#21644;&#36235;&#21183;&#20197;&#21450;&#20851;&#38190;&#25216;&#26415;
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> &copy; 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> &copy; 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:&#22522;&#20110;&#20108;&#32500;&#26391;&#22855;&#30456;&#20301;&#20809;&#26629;&#30340;&#22235;&#27874;&#27178;&#21521;&#21098;&#20999;&#24178;&#28041;&#23450;&#37327;&#30456;&#20301;&#25104;&#20687;
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 &#65288;QPI&#65289; is a technique that can measure the phase map of the light field. It has the characteristics of label-free&#65292; 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&#65292; including the interferometric method such as Digital Holographic Microscopy &#65288;DHM&#65289;&#65292; and the non-interferometric method such as the Fourier Ptychography Microscopy &#65288;FPM&#65289;&#65292; Transport of Intensity Equation &#65288;TIE&#65289; 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&#65292; but requires iterative calculation or multiple images recorded at different positions&#65292; which makes the imaging speed slow and unsuitable for real-time observation. The quantitative phase imaging based on Quadriwave Lateral Shearing Interferometry &#65288;QLSI&#65289; has the advantages of the referenceless beam&#65292; simple configuration&#65292; high stability and fast imaging speed. In the existing studies&#65292; Cross Grating &#65288;CG&#65289;&#65292; Modified Hartmann Mask &#65288;MHM&#65289;&#65292; Randomly Encoded Hybrid Grating &#65288;REHG&#65289; and other splitter elements were used for QLSI. The cross grating has low diffraction efficiency and energy utilization rate &#65288;~10%&#65289; 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 &#65288;~37%&#65289;&#65292; and the REHG has a complex structure for fabrication. This paper proposes a quantitative phase imaging method based on QLSI using a two-dimensional &#65288;2D&#65289; 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&#65292; 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&#65292; 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&#65292; 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&#65292; 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 &mu;m&times;9 &mu;m of the detector and the period of 54 &mu;m of the 2D Ronchi grating. The grating period is precisely six times of the pixel size&#65292; 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.&#65292; Polymethyl Methacrylate &#65288;PMMA&#65289; microspheres&#65292; microlens arrays and staphylococcus section. The relative error of phase experimentally measured is about 1.8%&#65292; 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&#65292; making it easily combined with conventional optical microscopes to have a great application potential in biomedicine&#65292; three-dimensional topography measurement and other related fields.<br/></div> &copy; 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 &#65288;No. 61975233&#65289;&#65292; Youth Innovation Promotion Association&#65292; CAS &#65288;No. 2019393&#65289;&#65292; National Key Research and Development Program of China &#65288;No.2018YFE0128300&#65289;
 
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> &copy; 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> &copy; 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> &copy; 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:&#26174;&#24494;&#25104;&#20687;&#31995;&#32479;&#20998;&#36776;&#29575;&#38382;&#39064;&#35752;&#35770; (&#29305;&#36992;)
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> &copy; 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> &copy; 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:&#22522;&#20110;&#24102;&#26377;&#27169;&#24335;&#20998;&#31163;&#22120;&#30340;&#24494;&#29615;&#35856;&#25391;&#22120;&#30340;&#27874;&#38271;-&#27169;&#24335;&#28151;&#21512;&#22797;&#29992;&#31995;&#32479;
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&#65292; data centers and other scenarios will support high-speed data transmission. In order to meet the demand&#65292; lots of technologies in silicon photonics have emerged&#65292; such as Wavelength Division Multiplexing &#65288;WDM&#65289;&#65292;Polarization Division Multiplexing &#65288;PDM&#65289; and Mode Division multiplexing &#65288;MDM&#65289;. To further increase the channel capacity&#65292; 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&#65292; the effect of mode splitting is better at a longer length&#65292; but we need to put the mode splitter into the microring resonator&#65292; and such a high mode separation efficiency and coupling efficiency will lead to low efficiency of microring resonance. So&#65292; we take the appropriate length. Secondly&#65292; 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&#65292; allowing high order mode transmission&#65292; and the other side is a slot waveguide with a width of 0.86 nm&#65292; 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&#65292; for microring resonators&#65292; we can select the desired resonant wavelength by designing appropriate parameters such as radius&#65292; waveguide width&#65292; coupling region length and gap. By simulating the proposed structure with the finite difference time domain method&#65292; 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&#65292; a Q value of 3 692&#65292; and an optical bandwidth of 52 GHz. Its free spectral range is 1.03 THz&#65292; 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&#65292; 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&#65292; and the microring also has the ability of wavelength selection. In addition&#65292; the through ports with fabrication tolerance from -10 nm to +15 nm have responses of less than -20 dB&#65292; while the response of the drop ports remains within -1 dB. Compared with other devices&#65292; our design has advantages in insertion loss&#65292; crosstalk and FSR. In conclusion&#65292; 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&#65292; which may be the main device for ultra-compact hybrid multiplexing technology in near future.<br/></div> &copy; 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 &#65288;No. 61635013&#65289;
 
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> &copy; 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 Schr&ouml;dinger 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> &copy; 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 schr&ouml;dinge 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>&minus;1</sup> and 0.69 mg L<sup>&minus;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&rsquo;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> &copy; 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> &copy; 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> &copy; 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> &copy; 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 &mu;m and 1.6 &mu;m 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 &mu;m and 1.6 &mu;m seed lasers and the total pump light are 5 W, 20 W, and 300 W, respectively, the 2.8 &mu;m laser theoretically achieves an output power of &sim;100 W. The amplifier scheme can also reduce the fiber temperature. Additionally, the results show that there is no excited state absorption at &sim;1.675 &mu;m, and thus injecting a 1.675 &mu;m laser to the amplifier is not conducive to the power scaling.<br/></div> &copy; 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> &copy; 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&minus;N bond formation from dinitrogen (N<inf>2</inf>) is of great interest but remains a challenge. Here, by virtue of unique plasma&ndash;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> &copy; 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&ndash;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&#8208;434), the Key Research and Development Program of Shaanxi Province (2019ZDLSF01&#8208;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:&#27700; &#19979; &#28237; &#27969; &#20013; &#28201; &#24230;&#12289;&#30416; &#24230; &#23545; &#20809; &#23398; &#31995; &#32479; &#25104; &#20687; &#36136; &#37327; &#24433; &#21709;&#20998; &#26512;
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&#65292;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&#65292;it can change the wavefront structure of the beam&#65292;affect the modulation transfer function&#65292;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&#65292;and the researches on turbulence is based on Nikishov's power spectrum. In this power spectrum&#65292;eddy diffusion rate is constant&#65292;does not relate to the average water temperature and the average salinity which can influence on eddy diffusion rate. Thus&#65292;the turbulence caused by the refractive index models still needs further refinement. Later&#65292;some scholars improved the refractive index fluctuation power spectrum. In this model&#65292;the average temperature and average salinity are used to characterize the vortex diffusion rate&#65292;and the refractive index fluctuation power spectrum model based on temperature and salinity is established. Compared with Nikishov's power spectrum&#65292;the power spectrum model is more complete&#65292;but the temperature variance dissipation rate and kinetic energy dissipation rate used to characterize turbulence intensity cannot be measured in the experiment&#65292;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&#65292;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&#65292;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&#65292;thus analyzing the imaging quality. By controlling the experimental conditions&#65292;the imaging results under different temperatures and different salinity conditions are obtained. On this basis&#65292;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&#65292;and the decrease amplitude is basically the same. With the increase of temperature&#65292;the MTF basically conforms to the linear decline law&#65292;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&#65292;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> &copy; 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&#65288;No.2018YFC0307904&#65289;&#65292;Class A Strategic Priority Research Program of the Chinese Academy of Sciences&#65288;No. XDA22030203&#65289;&#65292;West Light Foundation of the Chinese Academy of Science&#65288;No. XAB2019B22&#65289;
 
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> &copy; 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&mdash;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> &copy; 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 schr&ouml;dinge 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:&#22522;&#20110;&#22609;&#26009;&#20256;&#20687;&#20809;&#32420;&#38453;&#21015;&#30340;&#22810;&#23380;&#24452;&#39640;&#20998;&#36776;&#25104;&#20687;&#25216;&#26415;
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&#65292; industry&#65292; aerospace and other fields because of its excellent flexibility&#65292; especially in the application of optical fiber endoscope in medicine. Optical fiber image transmission system is usually composed of imaging objective&#65292; imaging fiber and image sensor.At present&#65292; the number of pixels in cameras can reach millions or even tens of millions&#65292; but the number of pixels in optical fibers is usually only a few hundred thousand.Therefore&#65292; the resolution of the system is limited by the resolution of the imaging fiber itself&#65292; and the imaging resolution of the whole system basically depends on the number of pixels that the imaging fiber can transmit. At present&#65292; the imaging fiber bundles on the market have either high resolution but small total cross-sectional area&#65292; 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&#65292; while large cross section can not reach high resolution due to technological limitations. To solve the problems&#65292; this paper proposes a multi-aperture high-resolution imaging technology based on imaging fiber array&#65292; 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&#65292; 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&times;8&#65292; and the microlens array is designed based on the imaging fiber array. There are two groups of aspherical lenses made of PMMA material&#65292; 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&#65292; the aperture coefficient is 6.3&#65292; and the field Angle is 88&deg;. The simulation results show that both the main lens and the microlens array can meet the performance requirements of the imaging fiber&#65292; 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&#65292; without weakening the quality of the primary image&#65292; 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&#65292; which proves that the design of the imaging system has a good feasibility&#65292; and has an important practical reference significance for improving the resolution of the optical fiber image transmission system.<br/></div> &copy; 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 &#65288;No.62071465&#65289;&#65292; Key Research and Development Plan of Shaanxi Province&#65288;Nos.2021GY-048&#65292;2020GY-266&#65289;&#65292; Youth Talent Lift Project of Xi'an Science and Technology Association &#65288;No.095920201317&#65289;&#65292; "Light of the West" Talent Training Program of Chinese Academy of Sciences &#65288;No.XAB2021YN11&#65289;
 
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&rsquo;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 &mu;m -3.6 &mu;m with a spectral bandwidth of the conversion efficiency over 50% approaching to 400 nm when the crystal length L=1 mm.<br/></div> Copyright &copy; 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> &copy; 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:&#22522;&#20110;&#21825;&#21886;&#31649;&#29702;&#28608;&#20809;&#22120;&#30340;&#30452;&#25509;&#35843;&#21046;RZ-DPSK &#20449;&#21495;&#20135;&#29983;&#25216;&#26415;&#30740;&#31350;
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&rsquo;an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Shaanxi, Xi&rsquo;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> &copy; 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> &copy; 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 &mu;m hollow-core capillaries as the sensing and reference Fabry Perot cavity. An open passage is formed by a 5 &mu;m 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> &copy; 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:&#28608;&#20809;&#25216;&#26415;&#22312;&#30524;&#31185;&#30340;&#24212;&#29992;&#29616;&#29366;&#19982;&#36827;&#23637;
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 &gt;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&reg; transscleral laser therapy (MicroPulse&reg; 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> &copy; 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 &mu;m 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>&ndash;BaF<inf>2</inf>&ndash;LaF<inf>3</inf>&ndash;La<inf>2</inf>O<inf>3</inf> (TBLL) fluorotellurite glasses with low OH<sup>&minus;</sup> absorption (0.026 cm<sup>-1</sup>), high glass transition temperature (434 &deg;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 &mu;m 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 &mu;m 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 &sim;3 &mu;m fiber laser.<br/></div> &copy; 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&ndash;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&ndash;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 &times; 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> &copy; 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 &times; 10<sup>&minus;3</sup> dB&#8729;ppb<sup>&minus;1</sup> at the PDA concentrations of 0.05 g&#8729;L<sup>&minus;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> &copy; 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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 &#65288; BHJ20C008 &#65289;.
 
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 &mu;m. 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> &copy; 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 &gamma;. 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> &copy; 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:&#29992;&#20110;&#32418;&#22806;&#28608;&#20809;&#20256;&#36755;&#30340;&#30827;&#31995;&#29627;&#29827;&#20809;&#32420;&#30740;&#31350;&#36827;&#23637;
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 &mu;m 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 &mu;m to 5 &mu;m 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 &mu;m long-wave mid-infrared lasers, high power CO (5.4 &mu;m) and CO<inf>2</inf> (10.6 &mu;m) 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 &mu;m 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 &mu;m 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 &mu;m (Fig. 1). For 512 &mu;m 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 &mu;m. 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> &copy; 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> &copy; 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 &#65288;Invited&#65289;
Title of translation:&#39640;&#21151;&#29575;&#21333;&#26230;&#20809;&#32420;&#36229;&#30701;&#33033;&#20914;&#25918;&#22823;&#25216;&#26415;&#30740;&#31350;&#36827;&#23637;&#65288;&#29305;&#36992;&#65289;
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&#65292; which can effectively increase photon flux&#65292; obtain enough experimental data quickly&#65292; and overcome the existing problem of space charge effect. Therefore&#65292; it has important application value in high order harmonics and attosecond pulse generation. At the same time&#65292; high repetition rate and high output power femtosecond pulses also have important application prospects in ultrafast laser precision micro-machining field&#65292; which can solve the technical problems of hard&#65292; 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&#65292; 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&#65292; fiber amplifiers have many characteristics&#65292; such as easy operation&#65292; all-fiber fusion&#65292; easy integration&#65292; excellent heat dissipation performance&#65292; excellent beam quality&#65292; etc.&#65292; which have attracted much attention in the field of ultra-short pulse amplification. However&#65292; limited by the mode field area of ordinary single-mode or nearly single-mode fiber&#65292; 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&#65292; the self-phase modulation&#65292; cross phase modulation and other nonlinear effect in the process of high power pulse amplification. In order to achieve high energy femtosecond pulse amplification&#65292; the current fiber amplification system mainly adopts the structure of CPA system. Before amplification&#65292; 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&#65292; disc and other solid amplifying media can output higher pulse energy&#65292;however&#65292;they are difficult to package&#65292; and the amplification structure is relatively complex&#65292; which is not conducive to the mass production of domestic lasers. Single crystal fiber as a new type of amplifier gain medium&#65292; it has a slender crystal structure and waveguide transmission characteristics for pump beam&#65292; which makes it have the advantages of both crystal and fiber laser amplification media. Its slender crystal structure can effectively dissipate heat&#65292; 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&#65292; the nonlinear accumulation of the single crystal fiber amplifier is much smaller&#65292; which is more conducive to the improvement of pulse energy. Meanwhile&#65292; 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&#65292; 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&#65292; 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&#65292; 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&#65292; 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&#65292; the single crystal fiber can consitute a simple and reliable amplification setup. For higher power output&#65292; it can also be used as a stable&#65292; cost-effective seeder with good optical parameters for solid state amplifier&#65292; such as thin-disk lasers. In the future development of lasers&#65292; 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&#65292; 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&#65292; by improving the heat transfer performance of cladding and the thermal management ability of fiber can realize the long distance fundamental mode waveguide&#65292; and finally realize the high power laser with higher efficiency&#65292; which is also an important direction of future development. Therefore&#65292; single crystal fiber as amplification gain medium has been widely used in ultrashort pulse amplification and has important application prospects in scientific research&#65292; national defense&#65292; industrial processing and other fields. This paper mainly introduces the structure and preparation methods of single crystal fiber&#65292; and the main research methods and results of ultrashort pulse amplification technology based on single crystal fiber in 1 &mu;m waveband&#65292; including the main progress made by our research group&#65292; the prospect and development direction of single crystal fiber amplification technology are also discussed and prospected.<br/></div> &copy; 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&#65292; National Natural Science Foundation of China &#65288;No. 61690222&#65289;&#65292; Chinese Academy of Science "Light of West China" Program &#65288;No. XAB2021YN12&#65289;&#65292; Shaanxi Young Science and Technology Star &#65288;No. 2022KJXX-98&#65289;&#65292; Youth Innovation Promotion Association XIOPM-CAS &#65288;No. XIOPMQCH2021007&#65289;
 
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&ndash;Ofelt theory. The mid-infrared luminescence properties of erbium-doped fluoroindate glasses were studied, and a strong emission at 2.7 &mu;m 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 &times; 10<sup>&minus;21</sup> cm<sup>2</sup>) at 2.7 &mu;m. 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> &copy; 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> &copy; 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 moir&eacute; 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&rsquo;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 moir&eacute; 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 moir&eacute; 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 moir&eacute; patterns.<br/></div> Copyright &copy; 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> &copy; 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 &mu;s. 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> &copy; 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> &copy; 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> &copy; 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/&deg;C. Due to its easy and controllable fabrication, the proposed sensor has great application prospects in the field of optical device.<br/></div> &copy; 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 &sim;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 &sim;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> &copy; 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 &mu; 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> &copy; 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:&#33406;&#37324;&#28065;&#26059;&#20809;&#26463;&#30340;&#22810;&#31354;&#38388;&#32500;&#24230;&#33258;&#30001;&#35843;&#25511;
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 0-2&pi;, 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> &copy; 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&#65306;National Natural Science Foundation of China&#65288;No. 11974102&#65289;&#65292;Key Scientific Research Projects of Institutions of Higher Learning of Henan Province Education Department&#65288;No. 21zx002&#65289;&#65292;State Key Laboratory of Transient Optics and Photonics&#65288;No. SKLST201901&#65289;
 
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 &mu;m 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 &mu;m, based on four-wave mixing in a high-Q MgF2 microresonator with optimized dispersion. The center wavelength at 4.78 &mu;m 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> &copy; 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&rsquo;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> &copy; 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 &middot; 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> &copy; 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: &#30740;&#31350;&#36039;&#21161;&#23616;, 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&middot;Hz<sup>4/5</sup> at 1GHz.<br/></div> &copy; Optica Publishing Group 2022, &copy; 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: &#30740;&#31350;&#36039;&#21161;&#23616;, 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&middot;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> &copy; 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 &times; 10<sup>4</sup> A/cm<sup>2</sup> and a low specific resistance of 1.5 &times; 10<sup>-5</sup> &Omega;cm<sup>2</sup> with a high n-doping concentration of 6 &times; 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 &mu;m at a limited current of 30 A.<br/></div> &copy; 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 &deg;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 &deg;C. Life test results show no failure in 1000 hours for 55 laser diodes.<br/></div> &copy; 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> &copy; 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> &copy; 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: T&Uuml;B&#304;TAK, Sponsor: T&uuml;rkiye Bilimsel ve Teknolojik Ara&#351;t&#305;rma Kurumu;
Funding text:T&Uuml;B&#304;TAK (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 (&gt;2.197&times;10<sup>&minus;3</sup>) over 0.6&sim;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 (&gt;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> &copy; 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&rsquo;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> &copy; 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 &asymp; 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> &copy; 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&rsquo;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> &copy; 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 Schr&ouml;dinger 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> &copy; 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. Dahlstr&ouml;m, 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 &sim;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 &times; 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> &copy; 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> &copy; 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> &copy; 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 &lambda;/2, formed by interfering the counterpropagating laser beams with wavelength &lambda;, 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> &copy; 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 (&sim;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 &beta;-BaB2O4 (BBO) crystals were compared regarding the energy efficiency, and the effects of the nonlinear absorption are discussed.<br/></div> &copy; 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&deg;&sim;60&deg; 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 &Phi; 105&times;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> &copy; 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 &mu;s. 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> &copy; 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&rsquo;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&nbsp;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&rsquo;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&rsquo;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&nbsp;role in optical signal&nbsp;processing. We demonstrated a low loss graphene/silicon-waveguide-based electro-optic phase modulator. The results demonstrate that&nbsp;the modulation&nbsp;efficiency increases when&nbsp;increasing&nbsp;the&nbsp;graphene layer and&nbsp;modulating&nbsp;length in mid-infrared region. Its&nbsp;3&nbsp;dB&nbsp;bandwidth (41.2 GHz) does&nbsp;not&nbsp;depend&nbsp;on&nbsp;the graphene modulating length. The two-layer graphene/silicon&nbsp;waveguide modulator can&nbsp;reach &pi;&nbsp;phase shift with minimum insertion loss (0.05&nbsp;dB)&nbsp;when the modulation length is 400&nbsp;&mu;m.&nbsp;This work is useful for designing a high-performance phase modulator.<br/></div> &copy; 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&deg; to + 60&deg;. the lens can match the cooling detector with effective pixel of 640 &times; 512, size of 15 &mu;m and F/4.The volume of the detector can be controlled in the range of L (196mm) &times; w (116mm) &times; 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> &copy; 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> &copy; 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> &copy; 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&sim;80 mW, and it is almost 23.8 times of the reported all-optical tunable Fabry-Perot filter.<br/></div> &copy; 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> &copy; 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 &lambda;/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> &copy; 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:&#22522;&#20110;&#26049;&#29923;&#20809;&#26463;&#34893;&#23556;&#21453;&#28436;&#30340;&#24378;&#28608;&#20809;&#36828;&#22330;&#28966;&#26001;&#27979;&#37327;&#26041;&#27861;
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> &copy; 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 0.048&lambda; (RMS, &lambda; = 632.8 nm). However, the print-through can be alleviated through Robot-arm wheel polishing. 0.015&lambda; (RMS) of surface accuracy was realized on a &#1060;100mm CFRP mirror.<br/></div> &copy; 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&deg;(working field of view is 60&deg;), and image elecentricity is less than 0.1&deg;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> &copy; 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&deg;, and working FOV is 60&deg; which can be extended to 105&deg;. The optical system has excellent imaging quality and successfully solved contradiction between large FOV and high resolution.<br/></div> &copy; 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> &copy; 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 &mu;m 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 &mu;m 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 &mu;m 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 &mu;m and 10.62 W at 4.3 &mu;m. 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 &lt; 1.9% at 8 h, respectively. Our results pave a way for designing high-power and high-efficiency 4-5 &mu;m MIR laser sources.<br/></div> &copy; 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 &mu;rad. 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> &copy; 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 &minus; 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> &copy; 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&times; microscope objective in the longitudinal writing scheme was studied in detail. The experimental results show that, under a fixed pulse energy value of 20 &mu;J, the waveguides can be realized with the scan speed from 20 to 160 &mu;m/s, and with a fixed scan speed value of 160 &mu;m/s, the waveguide can be prepared under an inscription energy range of 5-30 &mu;J, 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 &times; 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> &copy; 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 Investigaci&oacute;n, Universidad de Tarapac&aacute;, 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 &copy; 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> &copy; 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&nbsp;cm<sup>&minus;2</sup> at 1.5&nbsp;&micro;m 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&nbsp;&micro;m-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> &copy; 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&#8208;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> &copy; 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 Investigaci&oacute;n, Universidad de Tarapac&aacute;, 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&nbsp;simulations.<br/></div> &copy; 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> &copy; 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); Rodr&iacute;guez-Fortu&ntilde;o, 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&rsquo;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> &copy; 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> &copy; 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:&#20302;&#28201;808 nm&#39640;&#25928;&#29575;&#21322;&#23548;&#20307;&#28608;&#20809;&#22120;
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 &#8451;, 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 m&Omega;. In the temperature range of -60-60 &#8451;, the shift coefficient of the center wavelength with temperature was about 0.248 nm/&#8451;.<br/></div> &copy; 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:&#25910;&#31295;&#26085;&#26399;: 2022-01-19; &#20462;&#35746;&#26085;&#26399;: 2022-02-11 &#22522;&#37329;&#39033;&#30446;: &#22269;&#23478;&#33258;&#28982;&#31185;&#23398;&#22522;&#37329;(61504167); &#38485;&#35199;&#30465;&#33258;&#28982;&#31185;&#23398;&#22522;&#37329;(2019ZY-CXPT-03-05,2018JM6010,2015JQ6263); &#38485;&#35199;&#30465;&#31185;&#25216;&#21381; &#20154;&#25165;&#39033;&#30446;(2017KJXX-72); &#38271;&#26149;&#29702;&#24037;&#22823;&#23398;&#39640;&#21151;&#29575;&#21322;&#23548;&#20307;&#28608;&#20809;&#22269;&#23478;&#37325;&#28857;&#23454;&#39564;&#23460;&#22522;&#37329;&#36164;&#21161;&#39033;&#30446; 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 &mu;m 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 &micro;m 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 &mu;m 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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 &sim;4 ps, and a peak power of &sim;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> &copy; 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 &mu;m. 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&prime;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 &deg;C and 310 &deg;C. When it is kept at 310 &deg;C for 40 h, the Vicker&prime;s hardness and fracture toughness of the glass can reach 160.56 kgf&sdot;mm<sup>&minus;2</sup> and 0.82 kgf&sdot;mm<sup>&minus;1/2</sup>, respectively.<br/></div> &copy; 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> &copy; 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&#65288;Invited)
Title of translation:&#22522; &#20110; &#20132; &#21449; &#24310; &#36831; &#32447; &#20301; &#25935; &#38451; &#26497; &#24494; &#36890; &#36947; &#26495; &#25506; &#27979; &#22120; &#30340;&#20809; &#23376; &#35745; &#25968; &#28608; &#20809; &#19977; &#32500; &#36229; &#20998; &#36776; &#25104; &#20687;&#65288;&#29305; &#36992;&#65289;
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&prime;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&#65292;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&#65292;the position-sensitive Micro-channel-plate with Cross-delay-line &#65288;MCP/CDL&#65289; detector-based photon-counting three-dimensional imaging technique is proposed. First of all&#65292;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&#65292;starting from the characteristics of the MCP/CDL detector itself&#65292;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&#65292;which gives a reference for real application in future. After that&#65292;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&#65292;how to use MCP/CDL detector to realize the synchronous timing and positioning of arriving photon is qualitatively explained. On the other hand&#65292;with the help of the classical LIDAR equation&#65292;the echo power model and the echo photon model generated from the echo power model are given respectively. Based on the two basic models&#65292;three important models including the signal to noise ratio model&#65292;detection probability model&#65292;and ranging accuracy model are derived one by one&#65292; based on which the performance of the proposed technique is investigated numerically. After establishing the all-chain imaging model&#65292;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&#65292;the simulated photon-counting three-dimensional laser imaging is carried out with different conditions and in this way&#65292;the potential performance of this system in space situational awareness is demonstrated vividly. However&#65292;nowadays&#65292;most photon-counting detectors including the MCP/CDL detector have a low spatial resolution. In this case&#65292;the ranging imaging has a strong mosaic effect which is hard to resolve finer details. Besides that&#65292;the ranging accuracy is mainly determined by timing electronics. Considering these two situations&#65292;how to improve the spatial and temporal resolution is also discussed. Taking the finer details provided by the higher resolution intensity image as reference&#65292;the spatial resolution of ranging images could be improved prominently. At the mean time&#65292;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&#65292;the potential of this system in realizing super-resolution both in the spatial domain and in the temporal domain is demonstrated. Finally&#65292;the prototype camera using MCP/CDL detector is designed&#65292;tested and fabricated. By using the prototype camera&#65292;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&#65292;the position-sensitive micro-channel-plate having cross-delay-line based photon-counting three-dimensional laser imaging is proven to be effective.<br/></div> &copy; 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 &sim; 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> &copy; 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. &ndash; 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 (G&ouml;teborg 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 &Aring;ke Larson (G&ouml;teborg University) for comments on an early version of the paper and Henrik Drake (G&ouml;teborgs University) for constructive discussions. The manuscript greatly benefited from the review comments by Dr. Ingrid Anne Munz and Dr. Kjell Billstr&ouml;m.
 
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> &copy; 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&deg;, 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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> &copy;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&rsquo;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> &copy; 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> &copy; 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:&#22823;&#21464;&#20493;&#27604;&#20809;&#23398;&#34987;&#21160;&#21322;&#26080;&#28909;&#21270;&#21464;&#28966;&#31995;&#32479;&#35774;&#35745;
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 &#8451; and +60 &#8451;, 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> &copy; 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&#32534;&#30721;&#32418;&#22806;&#20809;&#35889;&#25104;&#20687;&#31995;&#32479;&#35774;&#35745;
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&deg; 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 &micro;m. 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> &copy; 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> &copy; 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> &copy; 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> &copy; 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:&#22522;&#20110;&#24179;&#38754;&#34917;&#19969;&#30340;&#33258;&#36866;&#24212;&#20843;&#21449;&#26641;&#19977;&#32500;&#22270;&#20687;&#37325;&#24314;
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> &copy; 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:&#22522;&#20110;&#32479;&#35745;&#24179;&#22343;&#26041;&#27861;&#23454;&#29616;&#36879;&#36807;&#25955;&#23556;&#20171;&#36136;&#20840;&#24687;&#25104;&#20687;
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&#65292; in the natural environment&#65292; 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&#65292; photons are scattered with the scattering medium and the incident wavefront of the light is destroyed&#65292; resulting in a change in the direction of light propagation&#65292; 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&#65292; in this paper&#65292; 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&#65292; and the exposure time of the camera is increased so that the time average of the scattering field replaces the collective average&#65292; 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&#65292; fast reconstruction speed&#65292; and low cost. Compared to wavefront shaping technology&#65292; transmission matrix technology&#65292; adaptive optics technology&#65292; and other methods of imaging through scattering media&#65292; this method does not require phase correction and complex image processing&#65292; target scanning&#65292; wavefront shaping&#65292; 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&#65292; and the faster the rotation speed&#65292; 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&#65292; the imaging experiment through a single scattering medium was carried out. The laser light is divided into two beams by the beam splitter&#65292; one beam of light irradiates the object for transmission or reflection and then passes through the rotating ground glass as the object light&#65292; and the other beam is reflected by the mirror. After the incident on the convex lens&#65292; the convex lens converts the light beam from a plane wave to a spherical wave emitted by a point light source&#65292; 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&#65292; and finally&#65292; 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&#65292; to solve the problem that actual imaging scenes rarely have a scattering medium with rotation or small displacement&#65292; 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&#65292; the method is still able to image the target object clearly and achieve imaging through a double scattering medium. Finally&#65292; the reconstructed image is subjected to Butterworth high-pass filtering&#65292; and the contrast of the reconstructed image is effectively improved after the filtering.<br/></div> &copy; 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 &#65288;No. 62071465&#65289;
 
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:&#36817;&#32418;&#22806;&#31354;&#38388;&#22806;&#24046;&#25289;&#26364;&#20809;&#35889;&#20202;&#30740;&#31350;
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 &plusmn;2&deg; 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> &copy; 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&#65306;National Natural Science Foundation of China&#65288;No. 41005019&#65289;&#65292;West Light Foundation of the Chinese Academy of Sciences&#65288;No. XAB 2016A07&#65289;&#65292;Natural Science Basic Research Program of Shaanxi Province&#65288;No. 2019JQ-931&#65289;&#65292;West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences&#65288;No. E1294301&#65289;
 
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> &copy; 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:&#26377;&#38480;&#21387;&#21147;&#19979;&#30382;&#32932;&#32452;&#32455;&#27169;&#22411;&#30340;&#34880;&#31649;&#21160;&#21147;&#23398;&#21450;&#20809;&#23398;&#32806;&#21512;&#20998;&#26512;
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 &copy;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> &copy; 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:&#22522;&#20110;&#21452;&#30446;&#26631;&#35782;&#21035;&#21644;&#20934;&#30452;&#25968;&#23398;&#27169;&#22411;&#25913;&#36827;&#30340;&#20809;&#36335;&#33258;&#21160;&#20934;&#30452;&#26041;&#27861;
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&#65292; analog optical alignment and optical docking alignment before physical experiment starting. With the deepening of physical experiments&#65292; the optical docking alignment process of high-power laser device encounters some new problems. First of all&#65292; the number of optical targets has changed. In the previous optical docking alignment process&#65292; alignment task was performed with the analog laser source turned off. There was only one main laser target in the docking alignment image. Now&#65292; in order to reduce the influence of the drift alignment accuracy of the main laser target&#65292; the analog laser source is no longer turned off in the alignment process&#65292; which means an optical path alignment image contains both an analog laser target and a main laser target. Moreover&#65292; optical docking alignment mathematical model has changed&#65292; too. In the original high-power laser device&#65292; 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&#65292; and the parameter information of multi-path beams is not reflected in the mathematical model. Finally&#65292; the docking alignment process of high-power laser was executed in serial in the past&#65292; which greatly affected the alignment efficiency. In order to solve the above problems&#65292; this paper makes improvements from the following three aspects. For the first problem&#65292; according to the characteristics of different optical targets in optical docking alignment images&#65292; 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&#65292; then calculates their circle fitting ratio. Different optical targets can be recognized by comparing their circle fitting ratio. However&#65292; in some special situations&#65292; 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&#65292; a new parameter&#65292; based on the circle fitting coefficient&#65292; 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&#65292; 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&#65292; and improves convergence condition&#65292; 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&#65292; 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&#65292; the recognition error accuracy is less than 3 pixels&#65292; and the processing time is less than 1 second&#65292; which meets the accuracy and efficiency requirements of optical docking alignment of the high-power laser device. Simultaneously&#65292; 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> &copy; 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 &#65288;No.61705254&#65289;&#65292; Key Research and Development Program of Shaanxi Province of China &#65288;No.2020GY&#8210;005&#65289;
 
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&#65288;Invited&#65289;
Title of translation:&#38754; &#21521; &#19979; &#19968; &#20195; &#25968; &#23383; &#30149; &#29702; &#25104; &#20687; &#20998; &#26512; &#20202; &#30340; &#39640; &#36890; &#37327;&#20840; &#24425; &#33394; &#20613; &#37324; &#21494; &#21472; &#23618; &#26174; &#24494; &#25104; &#20687; &#26415;&#65288;&#29305; &#36992;&#65289;
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 &#65288;FPM&#65289; is a promising computational imaging technique&#65292;which tackles the intrinsic trade-off between high resolution and large wide Field Of View&#65288;FOV&#65289;with a combination of Synthetic Aperture Radar &#65288;SAR&#65289; and optical phase retrieval. In brief&#65292;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&#65288;NA&#65289;of the objective&#65292;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&#65292;thus the object&rsquo;s high-frequency information can be modulated into the passband of the objective. After an iterative phase reconstruction process&#65292;the synthesized information generates a high resolution object image including both intensity and phase properties. Additionally&#65292;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&#65292;FPM has developed rapidly&#65292;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&#65292;say&#65292;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&#65292;we comprehensively summarized the development trend of FPM technique in 9 aspects&#65292;including high-precision imaging&#65292;high-throughput imaging&#65292;high-speed or single shot imaging&#65292;3D or tomography imaging&#65292; mixed state decoupling&#65292; spectral dimension &#65288;color imaging to hyperspectral imaging&#65289;&#65292;high dynamic range&#65292;system extension&#65292;and typical applications. Among them&#65292;digital pathology is one of the earliest and the most successful applications of FPM. Distinguished from other reviews&#65292;we focused on introducing the development process and recent advances in the direction of digital pathology&#65292;and divided it into"0-1"&#65292;"1-10"&#65292;and"10-100"three periods and several stages. Several typical results are also provided. Specifically&#65292;the"0-1"refers to the birth of FPM&#65292;which breaks the mutual restrictions between FOV and spatial resolution. The"1-10"refers to the exploration period&#65292;where the accuracy and stability&#65292; limits and bottlenecks&#65292; and the efficiency of FPM have been successively discussed and improved. The stage of"10-100"refers to the industrialization period. During this period&#65292;researchers focus on market-oriented requirements including acquisition and analysis of color&#65292;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&#65292;a FOV of around 10 mm&#65288;2&times; objective&#65289;or 5 mm &#65288;4&times; objective&#65289;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&#65292; 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&#65292;including intraoperative pathology&#65292;quantitative Artificial Intelligence &#65288;AI&#65289; diagnosis&#65292; three-dimensional reconstruction&#65292; telepathology&#65292;teaching and standardized industry criteria. It should also be clarified that as a typical interdisciplinary field&#65292;even if the instrument is successfully invented&#65292;it only solves issues in the imaging section of the whole process of digital pathology&#65292;and there still remain a series of tough tasks to complete. We discussed and classified related scientific problems&#65292;technical problems&#65292;engineering problems&#65292;and industrial problems in detail&#65292;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&#65292;including the virtual staining&#65292;multimodal fusion imaging&#65292;label-free observation in situ&#65292; non-destructive three-dimensional reconstruction&#65292; preliminary screening&#65292; and recognition with AI&#65292;etc.&#65292;we believe that the industry problems will eventually be overcome or alleviated.<br/></div> &copy; 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&#65288;Nos. 12104500&#65292;12127805&#65289;
 
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 &#65288;Invited&#65289;
Title of translation:&#20108;&#27687;&#21270;&#38034;&#34180;&#33180;&#30340;&#21046;&#22791;&#25216;&#26415;&#21450;&#24212;&#29992;&#36827;&#23637;&#65288;&#29305;&#36992;&#65289;
Authors:Shi, Qianqian (1, 2); Wang, Jiang (1); Cheng, Guanghua (1) 
Author affiliation:(1) School of Artificial Intelligence&#65292; Optics and Electronics &#65288;iOPEN&#65289;, 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 &#65288;VO<inf>2</inf>&#65289; 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&#65292; its optical&#65292; electrical and thermal properties change dramatically. Therefore&#65292; vanadium dioxide is widely used in the fields of thermal light control&#65292; infrared and optical protection camouflage&#65292; 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&#65292; 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&#65292; we introduce the structure and phase transition mechanism of VO<inf>2</inf>. When the temperature exceeds 68&#8451;&#65292; VO<inf>2</inf> will undergo a phase transition from insulator to metal&#65292; and its crystal structure will change from monoclinic insulator to rutile metal structure. At the same time&#65292; because the crystal structure of vanadium dioxide changes after phase transformation&#65292; 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&#65292; people devote themselves to exploring the physical mechanism of its phase transition. Up to now&#65292; there have been many research on the VO<inf>2</inf> phase transition mechanism&#65292; and also various research methods and devices&#65292; but there is no accurate and unified statement. In this paper&#65292; we focus on three mainstream explanations of phase transition mechanisms&#65306; the first is electron-electron correlation mechanism&#65292; i.e. electron correlation driven Mott transition&#65307; The second is the electron phonon interaction mechanism&#65292; i.e. crystal structure driven Peierls transition. The third is that electron correlation and crystal structure jointly drive VO<inf>2</inf> phase transition&#65292; and the supporting evidence is summarized. In addition&#65292; 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&#65292; many new technologies for preparing VO<inf>2</inf> thin films&#65292; such as high-energy pulsed magnetron sputtering&#65292; atomic layer deposition&#65292; ink-jet printing&#65292; spray pyrolysis and laser direct writing&#65292; are introduced in detail&#65292; 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&#65292; this parameter thermal hysteresis width &Delta;H reflects the excellent degree of phase transition characteristics of VO<inf>2</inf> thin films &Delta;H will attenuate the phase transition behavior&#65292; reduce the working efficiency of the uncooled detector&#65292; and also reduce the sensitivity of the near-infrared optical response to temperature&#65292; thus reducing &Delta;H 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 &Delta;H. Many factors&#65292; such as stress&#65292; doping and defects&#65292; 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&#65292; 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&#65292; electrical and other properties before and after phase transition&#65292; so it is widely used in optoelectronic devices. In recent years&#65292; 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&#65292; we mainly introduce the application of VO2 thin films in the fields of modified smart windows&#65292; terahertz modulators&#65292; ultrafast optical switches&#65292; electrode materials and various sensors. This part can provide inspiration for researchers to explore new applications of VO<inf>2</inf> materials. Finally&#65292; the problems and prospects faced by the development of VO<inf>2</inf> thin films are predicted and evaluated. 1&#65289; How to prepare high-purity VO<inf>2</inf> thin films. 2&#65289; 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&#65292; laser&#65292; 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> &copy; 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 &#65288;No.61875226&#65289;&#65292; the Nature Science Foundation of Shaanxi Province&#65292; China &#65288;No. 2022JQ&#8210;013&#65289;
 
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&ndash;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&ndash;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> &copy; 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&#8208;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> &copy; 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&ndash;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&ndash;spectral neighborhood preserving NMF (SSNPNMF) for incomplete and noisy HSI data. First, a spatial&ndash;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&ndash;spectral information is designed to select similar pixels in the image. Subsequently, the spatial&ndash;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> &copy; 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> &copy; 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> &copy; 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> &copy; 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:&#28608;&#20809;&#30636;&#24577;&#20809;&#26629;&#28608;&#21169;&#19979;&#32467;&#26500;&#30340;&#36229;&#22768;&#21709;&#24212;&#29305;&#24615;&#30740;&#31350;
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 &#65288;NDT&#65289; supports field use and has a strong resolution&#65292; which is a key developing method in the field of structural health supervision and testing. In recent years&#65292; contact-type technical paths such as patch detection&#65292; medium coupling detection&#65292; and air coupling detection based on piezoelectric sensors have been formed&#65292; 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&#65292; 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&#65292; transverse wave and surface wave&#65292; and its propagation velocity is related to the density and elastic constant of the material. In the past&#65292; the spot source mode and line source mode of a pulsed laser beam&#65292; as well as the line source array mode modulated by lens array and fiber bundle with fixed physical structure&#65292; limited the flexibility of spatial expansion of pulsed laser&#65292; 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&#65306; the monochromatic coherence of laser restricts the modulation ability of beam spot&#65292; which leads to the limitation of ultrasonic time-frequency mode&#65292; meanwhile&#65292; the structural damage threshold limits the energy of pulsed laser&#65292; which leads to the shortage of ultrasonic signal intensity. In this paper&#65292; the spatial expansion of pulsed laser is combined with laser ultrasonic nondestructive testing technology. Then&#65292; the structural response of laser transient grating acting on aluminum alloy plate is studied from two aspects&#65306; 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&#65292; the peak gain and the decrease of energy density of the grid excitation signal are obtained for the first time&#65292; and the direction angle of near-field enhancement is revealed. The structure size of the simulation model is 50 mm&times;50 mm&times;5 mm&#65292; the number of grids is 189 062&#65292; 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&#65292; 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&#65292; aiming at the laser absorption process of rough surface&#65292; the reflection-absorption comprehensive model and lumped test method are developed to measure the laser absorption rate. In terms of numerical analysis&#65292; 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&#65292; 1ns pulse width and 6 mJ single pulse input was simulated&#65292; 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&#65292; 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&#65292; then&#65292; a "bright and dark" laser transient grating is formed. The transient laser grating acts on the surface of the aluminum plate&#65292; and the ultrasonic wave is excited in the aluminum plate by thermoelastic effect&#65292; 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&#65292; and the collected signal is displayed by oscilloscope. The device includes pulse laser&#65292; transient grating module&#65292; laser interferometer&#65292; oscilloscope and aluminum alloy plate. In terms of experimental research&#65292; the transient grating module was developed&#65292; 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&#65292; the maximum relative deviation of the surface displacement peak was 8.91%&#65292; and the deviation of surface acoustic wave velocity was 6.62%&#65292; corresponding to the signal delay at 10 mm from the center of the grating. Synthesize the above analysis&#65292; the dispersion of laser beam spot excited by laser transient grating reduces the energy density per unit area of the structure surface&#65292; and forms ultrasonic enhancement along the grating direction&#65292; which lays a good foundation for improving the signal-to-noise ratio and ensuring the safety of the structure.<br/></div> &copy; 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 &#65288;No. 62005311&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 162>
 
Accession number:20220086245
Title:Hilbert Transformation Deep Learning Network for Single-Shot Moir&eacute; 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&rsquo;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 moir&eacute; fringe pattern is an ill-posed inverse problem, which limits the applications of moir&eacute; 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 desired&pi;&#8725;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 Moir&eacute; profilometry.<br/></div> &copy; 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> &copy; 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> &copy; 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&times;10-6, and the ranging accuracy is better than 1.59cm.<br/></div> &copy; 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&rsquo; 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> &copy; 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&#9474;(HL)<sup>10</sup>H2L&#9474;A is smaller than G&#9474;(HL)<sup>10</sup>H&#9474;A with TiO<inf>2</inf>/SiO<inf>2</inf>. The surface profile of substrate with high reflective films (fused silica substrate, &straightphi;30&times;2 mm) is basically unchanged (&Delta;PV=0.004&lambda;) 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&#9474;(HL)<sup>10</sup>H2L&#9474;A is smaller than G&#9474;(HL)<sup>10</sup>H&#9474;A in residual stress of optical films and the change of surface shape on substrate. Its residual stress value is &ndash;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> &copy; 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&#65306;2021-10-29&#65307;Revised&#65306;2022-01-05 &#22522;&#37329;&#39033;&#30446;&#65306;&#38485;&#35199;&#30465;&#22269;&#38469;&#31185;&#25216;&#21512;&#20316;&#19982;&#20132;&#27969;&#35745;&#21010;&#36164;&#21161;&#39033;&#30446;&#65288;2018KWZ-02&#65289;&#65307;&#35199;&#23433;&#24066;&#26234;&#33021;&#25506;&#35270;&#24863;&#30693;&#37325;&#28857;&#23454;&#39564;&#23460;&#39033;&#30446;&#65288;201805061ZD12CG45&#65289; Fund&#65306;Shaanxi International Science and Technology Cooperation and Exchange Program Funding Project (2018KWZ-02); Xi'an Intelligent Visiting Perception Key Laboratory Project (201805061ZD12CG45) &#20316;&#32773;&#31616;&#20171;&#65306;&#26446;&#38451;&#65288;1995&mdash;&#65289;&#65292;&#22899;&#65292;&#21338;&#22763;&#30740;&#31350;&#29983;&#65292;&#20027;&#35201;&#30740;&#31350;&#26041;&#21521;&#20026;&#20809;&#23398;&#34180;&#33180;&#30340;&#35774;&#35745;&#12289;&#21046;&#22791;&#21450;&#26816;&#27979;&#25216;&#26415;&#12290; Biography&#65306;LI Yang (1995-), Female, Doctoral candidate, Research focus: design, preparation and testing technology of optical thin films. &#36890;&#35759;&#20316;&#32773;&#65306;&#24464;&#22343;&#29738;&#65288;1973&mdash;&#65289;&#65292;&#30007;&#65292;&#21338;&#22763;&#65292;&#25945;&#25480;&#65292;&#20027;&#35201;&#30740;&#31350;&#26041;&#21521;&#20026;&#20809;&#23398;&#34180;&#33180;&#30340;&#35774;&#35745;&#12289;&#21046;&#22791;&#21450;&#26816;&#27979;&#25216;&#26415;&#12290; Corresponding author&#65306;XU Jun-qi (1973-), Male, Doctor, Professor, Research focus: design, preparation and testing technology of optical thin films. &#24341;&#25991;&#26684;&#24335;&#65306;&#26446;&#38451;, &#24464;&#22343;&#29738;, &#33487;&#20426;&#23439;, &#31561;. 1064 nm &#28608;&#20809;&#39640;&#21453;&#33180;&#27531;&#20313;&#24212;&#21147;&#21450;&#20854;&#24418;&#21464;&#20998;&#26512;[J]. &#34920;&#38754;&#25216;&#26415;, 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> &copy; 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:&#20559;&#25391;&#21644;&#20301;&#30456;&#35843;&#25511;&#20998;&#20809;&#33180;&#30340;&#35774;&#35745;&#19982;&#21046;&#22791;
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&deg; 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&deg; incidence. The transmitted phase difference controlled within 5.02&deg; and the reflected phase controlled with 8.05&deg; 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 &copy;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 &micro;m 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 &times; 10 mm. Our method provides a valuable choice for realizing fast and flexible laser surface heat treatment.<br/></div> &copy; 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> &copy; 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&times;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> &copy; 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> &copy; 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&rsquo;an; 710119, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, Xi&rsquo;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 &micro;s, 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> &copy; 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:&#22522;&#20110;&#20998;&#27573;&#36793;&#32536;&#25311;&#21512;&#30340;&#27979;&#39118;&#22810;&#26222;&#21202;&#24046;&#20998;&#24178;&#28041;&#20202;&#25104;&#20687;&#28909;&#28418;&#31227;&#30417;&#27979;&#26041;&#27861;    (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 &copy; 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). &dagger; 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> &copy; 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:&#31354;&#38388;&#22826;&#38451;&#35266;&#27979;&#20837;&#23556;&#31383;&#32452;&#20214;&#28909;&#20998;&#26512;&#19982;&#35797;&#39564;&#39564;&#35777;
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&#8451;, and that of the window glasses is 26.3&#8451;, while the primary mirror of the AOS is able to maintain at 22&plusmn;2&#8451;. 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> &copy; 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&#65306;National Natural Science Foundation of China&#65288;No.51836005&#65289;&#65292;Innovative Science Foundation of China&#65288;No.51721004&#65289;&#65292;111 Project&#65288;No.B16038&#65289;
 
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> &copy; 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> &copy; 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&rsquo;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> &copy; 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 &#65288;Invited&#65289;
Title of translation:&#20013;&#39640;&#23618;&#22823;&#27668;&#39118;&#22330;&#25506;&#27979;&#22810;&#26222;&#21202;&#24046;&#20998;&#24178;&#28041;&#25216;&#26415;&#65288;&#29305;&#36992;&#65289;
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&#65292; and it is the basic data for weather forecasting&#65292; space environment monitoring&#65292; 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&#65292; 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&#65292; and successively developed a series of representative scientific instruments and satellite payloads based on the Fabry-P&eacute;rot interferometer and the Wide Angle Michelson interferometer. In 2006&#65292; the ENGLERT C R research team of the U.S. Naval Research Laboratory proposed a new planetary atmospheric wind detection technology&#65292; called Doppler Asymmetric Spatial Heterodyne wind measurement technology&#65292; this technology detects the Doppler frequency shift of the atmospheric airglow spectrum by inverting the phase of the interferogram&#65292; thereby realizing the detection of the atmospheric wind field. Compared with the Fabry-Perot interferometer and the Wide-Angle Michelson interferometer&#65292; the Doppler Asymmetric Spatial Heterodyne interferometer has the following advantages&#65306; 1&#65289;Two-beam equivalent thickness spatial modulation interference&#65292; which relaxes the requirements for the optical index of the element&#65307; 2&#65289; Interferometer does not need Step-by-step scanning&#65307; 3&#65289; Wind speed inversion is based on the Fourier transform relationship between interferogram and spectrogram&#65292; so it does not need extremely narrow bandwidth &#65288;&lt;1 nm&#65289; filters to separate single-line spectra&#65307; 4&#65289;Synchronous calibration can be achieved&#65292; 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&#65292; therefore&#65292; the measurement accuracy can be further improved. After nearly two decades&#65292; a series of research results have been achieved in basic theory&#65292; interferometer design&#65292; instrument development technology&#65292; data processing and wind speed retrieval of Doppler Asymmetric Spatial Heterodyne Interferometer. In terms of theoretical research progress&#65292; domestic and foreign scholars have theoretically analyzed the factors that affect the accuracy of interferometer phase inversion&#65307; In order to expand the detection capability of the Doppler Asymmetric Spatial Heterodyne Interferometer&#65292; four structural design schemes are proposed by referring to the spectral expansion method of the wide-spectru Spatial Heterodyne Spectroscopy&#65307; A series of interferogram preprocessing methods are proposed to eliminate the errors of the original interferogram caused by various defects of optical components&#65292; photoelectric sensors and optical systems. Foreign scholars put forward a wind field profile inversion method named "peeling onions". In terms of instrument research progress&#65292; since the Doppler Asymmetric Spatial Heterodyne Interferometer wind measurement technology was proposed in 2006&#65292; many international research institutions have carried out research on the development process of the core components of the interferometer&#65292; and successfully developed a variety of interferometer prototypes covering from visible light to long-wave infrared &#65292;such as Michelson Interferometer for Global High-resolution Thermospheric Imaging &#65288;MIGHTI&#65289;&#65292; Stratospheric Wind Interferometer for Transport studies- Doppler Asymmetric Spatial Heterodyne &#65288;SWIFT-DASH&#65289;&#65292; and Redline DASH Demonstration Instrument &#65288;REDDI&#65289;. 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&#65292; the institute focuses on the study of the interferometer thermal compensation method&#65292; the interferometer glass component design method&#65292; the interferometer component gluing and integration process&#65292; the interferometer support structure component design and integration process&#65292; and proposed a dual-band Doppler Asymmetric Spatial Heterodyne interferometer technology and a high-time-resolution ground-based Doppler Asymmetric Spatial Heterodyne interferometer technology&#65292; 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&#65292; discusses its technical characteristics and application potential&#65292; 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> &copy; 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 &#65288;No. 41005019&#65289;&#65292; West Light Foundation of the Chinese Academy of Sciences &#65288;No. XAB 2016A07&#65289;&#65292; Natural Science Basic Research Program of Shaanxi Province&#65288;No. 2019JQ-931&#65289;&#65292; West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences &#65288;No. E1294301&#65289;&#65292; Scientific Instrument Developing Project of the Chinese Academy of Sciences &#65288;No. YJKYYQ20210021&#65289;
 
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&ndash;12.5 &mu;m, the resolution of the sub star point is 325 m, and the imaging FOV is 110&deg;&times;1.4&deg; (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> &copy; 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 &minus;2 system [14] , the AWARE &minus;10 system [15] , AWARE &minus;40 system [16&ndash;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) &lambda; 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> &copy; 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> &copy; 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> &copy; 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:&#22810;&#26222;&#21202;&#24046;&#20998;&#24178;&#28041;&#20202;&#24178;&#28041;&#22270;&#30072;&#21464;&#23545;&#30456;&#20301;&#21453;&#28436;&#31934;&#24230;&#24433;&#21709;&#20998;&#26512;
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&#65292; to ensure the smooth development of spacecraft space activities&#65292; 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&#65292; the processing and assembly errors of optical components and structural components&#65292; 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&#65292; processing&#65292; and adjustment of Doppler asymmetric spatial heterodyne. In this paper&#65292; 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&#65292; the simulation compares the difference between the distorted interferogram&rsquo;s and the ideal interferogram&rsquo;s Doppler phase. By adding optical distortion&#65292; local bending&#65292; slanted fringes and frequency changed these four different forms of interferogram distortion&#65292; 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&#65292; the local bending of fringes has the greatest influence on Doppler phase inversion. The phase error increases by 0.113&permil; for each additional pixel of the local bending. But the maximum phase error is only 0.03&permil; under the condition of 2% distortion. To further explore the influence of local bending sizes and location&#65292; 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&#65292; 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&#65292; attention should be paid to the small distortion in the sampling center area&#65292; and if necessary&#65292; 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&#65292; 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&#65292; we simulate different interferograms with local bending of different local bending max offset&#65292; 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&#65292; but the phase uncertainty of the interferogram will not increase. Therefore&#65292; even if the interferogram has defects&#65292; 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&#65292; processing&#65292; and adjustment of the Doppler asymmetric spatial heterodyne.<br/></div> &copy; 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 &#65288;No. 41005019&#65289;&#65292; West Light Foundation of the Chinese Academy of Sciences &#65288;No. XAB 2016A07&#65289;&#65292; Natural Science Basic Research Program of Shaanxi Province &#65288;No. 2019JQ-931&#65289;&#65292; West Light Cross-Disciplinary Innovation Team of Chinese Academy of Sciences &#65288;No. E1294301&#65289;
 
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 &times; 180 mm primary mirror and 234 mm &times; 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 &lambda; to 0.013 &lambda; and 0.059 &lambda; to 0.018 &lambda; (&lambda; = 632.8 nm), respectively.<br/></div> &copy; 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> &copy; 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> &copy; 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:&#20542;&#26012;&#23433;&#35013;&#30340;&#20809;&#31649;&#28966;&#36317;&#26631;&#23450;&#26041;&#27861;&#30740;&#31350;
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&rsquo;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&rsquo;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 &plusmn;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> &copy; 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> &copy;
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 &mu;m - 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> &copy; 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> &copy; 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> &copy; 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 (1&omega;) absorptive glass, melting at high-temperature (1200&deg;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 (3&omega;) transparent glass, low-temperature (1000&deg;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 &sim;18%. The UV (355 nm) LIDT was significantly enhanced by &sim;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> &copy; 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&#8208;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 &times; 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> &copy; 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> &copy; 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:&#22522;&#20110;&#34893;&#23556;&#29702;&#35770;&#30340;&#21704;&#36798;&#29595;&#32534;&#30721;&#20809;&#35889;&#25104;&#20687;&#25968;&#25454;&#37325;&#26500;    (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 &copy; 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). &dagger; 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&deg;/s, taking the pitch axis as an example, the pitch speed error is 0.0039&deg;/s (3&sigma;). When the maximum speed of the given curve is 20&deg;/s and the maximum acceleration is 16&deg;/s, the position tracking error is 0.0025&deg; (3&sigma;). 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> &copy; 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&ndash;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&ndash;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&ndash;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> &copy; 2021 IEEE.
Number of references:49
Main heading:Image reconstruction
Controlled terms:Convolution - Feature extraction - Spectroscopy - Extr