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Accession number:20193307307493
Title:Mechanical rotation and bending sensing by chiral long-period grating based on an axis-offset rotating optical fiber
Authors:Wang, Ruiduo (1, 2); Ren, Zhaoyu (3); Kong, Xudong (1, 2); Kong, Depeng (1); 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 Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, Natl. Photoelectric Technol. and Funct. Materials and Application International Cooperation Center, Institute of Photonics and Photon-Technology, Northwest University, Xi'an; 710069, China
Corresponding author:He, Zhengquan(zhqhe@opt.ac.cn)
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:12
Issue:7
Issue date:2019
Publication year:2019
Article number:072013
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:A chiral long-period fiber grating (CLPFG) was fabricated by rotating the standard single mode fiber that was fixed on two fiber holders with an axis-offset. We investigated the performance of CLPFGs by sensing the mechanical twist, bending, and liquid refractive index experimentally. A wide twist sensing range of ±720° and 26.7 nm wavelength tuning range were achieved. Compared with tapered long-period fiber grating, the bending sensitivity of CLPFG is 5 times higher. Considering the simple and flexible fabrication process and low cost, this CLPFG may offer a simple and alternative choice for sensing mechanical deformation in industrial applications.
? 2019 The Japan Society of Applied Physics.
Number of references:22
Main heading:Fibers
Controlled terms:Costs - Diffraction gratings - Fiber optic sensors - Optical fiber fabrication - Refractive index - Single mode fibers
Uncontrolled terms:Fabrication process - Liquid refractive index - Long period fiber grating - Long Period Gratings - Mechanical deformation - Mechanical rotation - Standard single mode fibers - Wavelength-tuning range
Classification code:741 Light, Optics and Optical Devices - 911 Cost and Value Engineering; Industrial Economics
Numerical data indexing:Size 2.67e-08m
DOI:10.7567/1882-0786/ab2a20
Funding details: Number: 61535015, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:The authors acknowledge funding from National Natural Science Foundation of China (NSFC) (61535015); the International Science and Technology Cooperation Project (2014-10780); The Science and Technology innovation and Entrepreneurship double tutor project of Shaanxi province (2018JM1059).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184906173775
Title:Joint Learning of Fuzzy k-Means and Nonnegative Spectral Clustering With Side Information
Authors:Zhang, Rui (1); Nie, Feiping (2); Guo, Muhan (2); Wei, Xian (3); Li, Xuelong (2)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), 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 Computer Science, Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710072, China; (3) Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Quanzhou; 362200, China
Corresponding author:Nie, Feiping(feipingnie@gmail.com)
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:28
Issue:5
Issue date:May 2019
Publication year:2019
Pages:2152-2162
Article number:8543185
Language:English
ISSN:10577149
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:As one of the most widely used clustering techniques, the fuzzy k-means (FKM) assigns every data point to each cluster with a certain degree of membership. However, conventional FKM approach relies on the square data fitting term, which is sensitive to the outliers with ignoring the prior information. In this paper, we develop a novel and robust fuzzy k-means clustering algorithm, namely, joint learning of fuzzy k-means and nonnegative spectral clustering with side information. The proposed method combines fuzzy k-means and nonnegative spectral clustering into a unified model, which can further exploit the prior knowledge of data pairs such that both the quality of affinity graph and the clustering performance can be improved. In addition, for the purpose of enhancing the robustness, the adaptive loss function is adopted in the objective function, since it smoothly interpolates between &ell;1-norm and &ell;2-norm. Finally, experimental results on benchmark datasets verify the effectiveness and the superiority of our clustering method.
? 2018 IEEE.
Number of references:48
Main heading:Clustering algorithms
Controlled terms:Cluster analysis - Linear programming - Robustness (control systems)
Uncontrolled terms:Adaptation models - Adaptive loss functions - Clustering methods - Fuzzy k-means - Partitioning algorithms - Sparse matrices - Spectral clustering
DOI:10.1109/TIP.2018.2882925

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534470
Title:Study on characteristics in high-speed milling SiCp/Al composites with small particles and high volume fraction by adopting PCD cutters with different grain sizes
Authors:Huang, Shutao (1); Guo, Lin (1); Yang, Haicheng (2); Su, Ying (2); Xu, Lifu (3)
Author affiliation:(1) School of Automobile and Traffic, Shenyang Ligong University, Shenyang; 110159, China; (2) Xian Institute of Applied Optics and Precision Mechanics of CAS, Xi’an; Shanxi; 710068, China; (3) School of Mechanical Engineering, Shenyang Ligong University, Shenyang; 110159, China
Corresponding author:Huang, Shutao(syithst@163.com)
Source title:International Journal of Advanced Manufacturing Technology
Abbreviated source title:Int J Adv Manuf Technol
Volume:102
Issue:9-12
Issue date:June 19, 2019
Publication year:2019
Pages:3563-3571
Language:English
ISSN:02683768
E-ISSN:14333015
CODEN:IJATEA
Document type:Journal article (JA)
Publisher:Springer London
Abstract:Silicon carbide particle–reinforced aluminum matrix (SiCp/Al) composites were milled at a high speed by adopting polycrystalline diamond (PCD) tools, which the diamond grain sizes were 5, 10, 25, and 32 μm. The machined materials were SiCp/Al composites which the volume fraction was 45% and grain size of SiC particles was 5 μm. The tool wear resistance and wear morphology of polycrystalline diamond cutters were investigated. And it centered on the effects of diamond grain sizes on the cutting forces as well as the machined surface roughness. The obtained results indicated the difference of corresponding tool wear resistance between larger SiC particles and smaller SiC particles during high-speed milling SiCp/Al composites with higher volume fraction. When the grain size and volume fraction of SiC granules are 5 μm and 45%, the tool wear resistances of four diamond grain sizes were all far higher than those of tools in machining composites with higher volume fraction (56%) and larger 60-μm SiC particles. And the PCD tools of larger diamond grain size acted on better wear resistance. Both the corresponding cutting forces and surface roughness were also smaller. As cutting distance increased, the variation law of cutting forces had a good correspondence with the tool wear of PCD cutters of different diamond grain sizes. The machined surface roughness had a decreasing trend in general, but the fluctuation range was tiny. The main wear morphology was flank wear and slight wear groove marks. And there was no chipping of cutting edge and coarse wear groove marks. A large amount of the machined materials was adhered on flake face in the cutting process, but built-up edge was not formed.
? 2019, Springer-Verlag London Ltd., part of Springer Nature.
Number of references:21
Main heading:Diamond cutting tools
Controlled terms:Aluminum compounds - Carbide cutting tools - Cutting - Cutting tools - Diamonds - Grain size and shape - Milling (machining) - Particle reinforced composites - Particles (particulate matter) - Silicon carbide - Surface roughness - Volume fraction - Wear of materials - Wear resistance
Uncontrolled terms:Cutting characteristics - High speed milling - Machined surface roughness - Polycrystalline diamond tools - Polycrystalline diamonds - SiCp/Al composites - Silicon carbide particles - Tool wear
Numerical data indexing:Percentage 4.50e+01%, Percentage 5.60e+01%, Size 6.00e-05m
DOI:10.1007/s00170-019-03374-1

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106955856
Title:Polarization de-multiplexing using a modified Kalman filter in CO-OFDM transmissions
Authors:Jiang, Yang (1); Yi, Xingwen (1, 2); Hu, Shaohua (1); Huang, Xiatao (1); Tang, Wei (1); Zhou, Wenjing (1); Huang, Xinning (3); Zhang, Jing (1); Qiu, Kun (1)
Author affiliation:(1) Key Laboratory of Optical Fiber Sensing and Communications, University of Electronic Science and Technology of China, Chengdu; 611731, China; (2) School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou; 510275, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710075, China
Corresponding author:Zhang, Jing(zhangjing1983@uestc.edu.cn)
Source title:Chinese Optics Letters
Abbreviated source title:Chin. Opt. Lett.
Volume:17
Issue:3
Issue date:March 10, 2019
Publication year:2019
Article number:030603
Language:English
ISSN:16717694
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We propose the modified Kalman filter (MKF) using the received signal for observation and constructing an inverse process of the conventional Kalman filter (CKF) for polarization de-multiplexing in coherent optical (CO) orthogonal frequency-division multiplexing (OFDM) transmissions. The MKF can avoid the convergence error problem in CKF without matrix inverse operation and has a faster converging speed and a much larger tolerance to the process and measurement noise covariance, about two orders of magnitude more than those of CKF. We experimentally demonstrate the 12 Gbaud OFDM signal transmission over 480 km standard singlemode fiber. The performance of MKF and CKF outperforms pilot-aided polarization de-multiplexing with better accuracy and nonlinearity tolerance.
? 2019 Chinese Optics Letters.
Number of references:16
Main heading:Kalman filters
Controlled terms:Covariance matrix - Demultiplexing - Inverse problems - Orthogonal frequency division multiplexing - Polarization
Uncontrolled terms:Convergence errors - Converging speed - Matrix inverse operation - Measurement Noise - Nonlinearity tolerance - Orders of magnitude - Received signals - Standard single mode fibers
Classification code:921 Mathematics
Numerical data indexing:Size 4.80e+05m
DOI:10.3788/COL201917.030603
Funding details: Number: 61420106011, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871082, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871408, 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. 61420106011, 61871408, and 61871082).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748615
Title:MCP gain and its influence on ultraviolet photon counting imaging detectors
Authors:Liu, Yong-An (1, 2, 3); Xu, Neng (2, 3); Shi, Feng (2); Liu, Zhe (2); Sai, Xiao-Feng (2); Sheng, Li-Zhi (2); Tian, Jin-Shou (2); Zhao, Bao-Sheng (2)
Author affiliation:(1) Science and Technology on Low-Light-Level Night Vision Laboratory, Xi'an, 710065, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) 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:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:1102318
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:Micro-channel Plates(MCPs) are an important part of ultraviolet photon counting imaging detectors. They can intensify single particles or photons by the multiplication of electrons via secondary emission.Thus, the MCP gain has an very important influence on the performance of ultraviolet photon counting imaging detectors. In this article, influence of MCP gain on decoding accuracy is studied by using Monte Carlo method. Simulation results show that decoding error is large when MCP gain is low,and MCPs shoud have at least 106 gain to ensure accurate decoding. At the same time, influence of MCP gain on decoding error was tested by using ultraviolet photon counting imaging system based on TWA(Tetra Wedge Anode,TWA). Experimental results are consistent with the theoretical analysis and simulation.
? 2019 SPIE.
Number of references:9
Main heading:Image storage tubes
Controlled terms:Anodes - Decoding - Detectors - Monte Carlo methods - Photons
Uncontrolled terms:Analysis and simulation - Decoding errors - Micro channel plate - Photon counting - Position-sensitive anodes - Single particle - Ultraviolet photon
Classification code:714.1 Electron Tubes - 723.2 Data Processing and Image Processing - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics
DOI:10.1117/12.2521274
Funding details:
Funding text:This work was supported by the Foundation of Science and Technology on Low-light-level Night Vision Laboratory

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748649
Title:Image information from a dual channel optical synthetic aperture imaging system
Authors:Chen, Liwu (1, 2); Zhao, Boacheng (4); Chen, Ren (1, 2); Gao, Cong (1, 2, 3)
Author affiliation:(1) Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (2) Key Laboratory of Infrared Detection and Imaging Technology of CAS, Shanghai; 200083, China; (3) University of Chinese Academy of Sciences, Beijing; 10049, China; (4) Xi'an Institute of Optics and Precision Mechanics of CAS, 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:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:1102329
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:Introduce an optic system which by two fields of the system to observe the same object, it acquire two channels image of the object on the first imaging plate; and one by one the two channels image collimated by the array lens after them, then all the collimated beams were collected into the second image plate. As the two channels image were focus into the second image plate, super-resolution image of the object were acquired. The photos of the experiment proved this.
? 2019 SPIE.
Number of references:4
Main heading:Image acquisition
Controlled terms:Optical resolving power - Synthetic apertures
Uncontrolled terms:channel - multi - Optics systems - super - synthetics
Classification code:716.2 Radar Systems and Equipment - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics
DOI:10.1117/12.2522481
Funding details: Number: 16XD1404100, Acronym: -, Sponsor: Science and Technology Commission of Shanghai Municipality;
Funding text:Thanks to Mr. Ding Lei for his encouragement and support, and to all the colleagues in the Key Laboratory of Infrared System Detection & Imaging Technology for their support and assistance. This research was supported by the Shanghai science and Technology Commission No.16XD1404100

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907216731
Title:Microwave and Communications Applications of Microcombs
Authors:Xu, Xingyuan (1); Wu, Jiayang (1); Tan, Mengxi (1); Nguyen, Thach (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Mitchell, Arnan (1); Moss, David J. (1)
Author affiliation:(1) Swinburne University of Technology, Centre for Micro-Photonics, Hawthorn; VIC; 3122, Australia; (2) RMIT University, School of Engineering, Melbourne; VIC; 3000, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Hong Kong, Hong Kong; (4) Xi'An Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an, China; (5) INRS -énergie, Matériaux et Télécommunications, Varennes; QC; J3X1S2, Canada
Source title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Issue date:May 2019
Publication year:2019
Article number:8749545
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:2019 Conference on Lasers and Electro-Optics, CLEO 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:149135
Sponsor:AdValue Photonics; American Elements; Class5 Photonics; Coherent; et al.; GoFoton
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We review our recent work in the use of integrated micro-resonator based optical frequency comb sources as the basis for transversal filtering functions for microwave and radio frequency photonic filtering and advanced functions. We demonstrate a range of novel functions including a Hilbert Transform, first, second and third order RF differentiation, true time delays, an RF channelizer and other functions.
? 2019 OSA.
Number of references:44
DOI:10.23919/CLEO.2019.8749545

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106643608
Title:Analysis on the radiation effects of a charge-coupled device in a space debris detection satellite in orbit
Authors:Li, Yudong (1); Wen, Lin (1); Huang, Jianyu (2); Wen, Yan (3); Zhang, Keke (4); Guo, Qi (1)
Author affiliation:(1) Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi; 830011, China; (2) Beijing Institute of Tracking and Telecommunications Technology, Beijing; 100094, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Shanghai Engineering Center For Microsatellites, Shanghai; 201203, China
Source title:Yaogan Xuebao/Journal of Remote Sensing
Abbreviated source title:Yaogan Xuebao/J. Remote Sens.
Volume:23
Issue:1
Issue date:January 25, 2019
Publication year:2019
Pages:116-124
Language:Chinese
ISSN:10074619
E-ISSN:20959494
Document type:Journal article (JA)
Publisher:Science Press
Abstract:High-performance Charge-Coupled Devices (CCDs) are the preeminent detectors for space-based photoelectric detection. However, the vulnerability of CCDs to radiation damage in the space radiation environment is a serious threat to space imaging applications in terms of earth-observing spectral measurement and space debris detection. Observing the in-orbit radiation effects of CCDs used in a space imaging system is crucial. This kind of work can provide essential data for the in-orbit maintenance and future design of a space mission. Through calculation and analysis using plenty of in-orbit images generated by a space debris detection experiment satellite, several kinds of imaging abnormalities caused by the space radiation environment of the satellite are observed. The radiation damage on the CCD imager used in the satellite's visible camera is assessed. First, the abnormal phenomenon of imaging functions is described. Second, transient effects and hot pixels induced by protons in the space environment are analyzed. In addition, the total ionizing dose effects and displacement damage of the CCD imager are estimated to help predict the long-term in-orbit performance of the device. The transient effects mainly result from the instantaneous ionization in pixel structures induced by protons from the South Atlantic Anomaly (SAA). When the satellite traversed the SAA, the number of transient effects is changed in proportion to the proton flux in this position in the SAA. The number of transient effects for one traversing agrees with the Gaussian distribution. All the hot pixels present a high dark current several times larger than that of most normal pixels. The number of hot pixels increase with the time in-orbit of the satellite. The increase is almost linear with the run time or the times passed through the SAA. The hot pixels are mainly attributed to the single particle displacement damage induced by energetic protons in the SAA. No observable correlation is noted between hot pixels and transient effects. The principal influence on the CCD imager is the increase of hot pixels with the time in-orbit. Even in the early stage after the launch of the satellite, the influence of CCD's hot pixels may be significant, an outcome that is clearly different from the accumulated radiation damage (total ionizing dose effects and accumulated displacement damage) on CCDs. The results of the above work suggest that critical information is obtained for operational risk assessment and in-orbit management of the satellite. In addition, the methodology is formed for in-orbit radiation degradation prediction on image sensor and optical payload. The method may be useful for radiation hardness on a space-based debris detection satellite, which is situated in either low or high earth orbit. The mechanisms of hot pixels generated by proton bombardment still require further study.
? 2019, Science Press. All right reserved.
Number of references:20
Main heading:Orbits
Controlled terms:Charge coupled devices - Damage detection - Earth (planet) - Ionizing radiation - Pixels - Radiation damage - Radiation effects - Risk assessment - Satellites - Space debris
Uncontrolled terms:Detection experiments - Hot pixels - In-orbit - Photoelectric detection - South atlantic anomalies - Space radiation environment - Total ionizing dose effects - Transient effect
Classification code:655.2 Satellites - 656.1 Space Flight - 714.2 Semiconductor Devices and Integrated Circuits - 914.1 Accidents and Accident Prevention
DOI:10.11834/jrs.20197144
Funding details: Number: 11675259, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (No. 11675259); Youth Innovation Promotion Association CAS, CAS "Light of West China" Program (No. 2016-QNXZ-B-8);

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106621836
Title:Imaging property analysis of segmented mirror
Title of translation:拼接镜成像性能分析
Authors:Li, Yichao (1, 2); Kang, Fuzeng (1); Wang, Hao (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
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:48
Issue:1
Issue date:January 25, 2019
Publication year:2019
Article number:0118006
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Segmented errors have important influence on the image quantity of segmented mirror. The complex amplitude distribution of reflected lightwave corresponding to single segment was given based on the scalar diffraction theory. The analysis model which characterized the impact of segmented errors was established by processing the segmented errors through coordinate transformation method. The Point Spread Function (PSF) and Strehl Ratio (SR) curves corresponding to various segmented errors were got by numerical simulation. The results show that SR curves corresponding to piston errors are periodic. The SR curves corresponding to tip-tilt errors and segment gaps have same structures. The conclusion provides a support for the image quantity analysis of segmented mirror.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:10
Main heading:Errors
Controlled terms:Computer simulation - Diffraction - Mirrors - Numerical models - Optical transfer function
Uncontrolled terms:Analysis models - Complex amplitude distribution - Coordinate transformation methods - Imaging properties - Quantity analysis - Scalar diffraction - Scalar diffraction theory - Segmented mirror
Classification code:723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics
DOI:10.3788/IRLA201948.0118006

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006917060
Title:Orthogonally Polarized Optical Single Sideband Generation Based on Integrated Microring Resonators
Authors:Wu, Jiayang (1); Xu, Xingyuan (1); Nguyen, Thach G. (1); Chu, Sai T. (1); Little, Brent E. (3); Morandotti, Roberto (4); Mitchell, Arnan (5, 6, 7); Moss, David J. (1, 2)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-Energie, Materiaux et Telecommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Source title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.
Part number:1 of 1
Issue title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Issue date:April 22, 2019
Publication year:2019
Article number:8696989
Language:English
ISBN-13:9781943580538
Document type:Conference article (CA)
Conference name:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019
Conference date:March 3, 2019 - March 7, 2019
Conference location:San Diego, CA, United states
Conference code:147617
Sponsor:3M Science Applied to Life; AC Photonics, Inc.; Acacia Communications, Inc.; AIM Photonics; Alibaba Group; et al.
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We demonstrate orthogonally polarized RF optical single sideband generation based on integrated dual-polarization-mode microring resonators. A high optical carrier-to-sideband ratio of 59.3 dB and a large RF tuning range of over 20 GHz are achieved.
? 2019 OSA.
Number of references:12
Main heading:Optical fiber communication
Controlled terms:Light transmission - Optical fibers - Optical resonators
Uncontrolled terms:Dual-polarizations - Microring resonator - Optical carriers - Optical single side bands - Tuning ranges
Classification code:717.1 Optical Communication Systems - 741 Light, Optics and Optical Devices
Numerical data indexing:Decibel 5.93e+01dB, Frequency 2.00e+10Hz

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106969839
Title:Modeling and optimization of actively Q-switched 2.8 μm Er3+-doped ZBLAN fiber laser
Authors:Shen, Yanlong (1, 2, 3, 4); Wang, Yishan (1, 5); Tao, Mengmeng (3); Luan, Kunpeng (3); Zhu, Feng (3); Si, Jinhai (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, Shaanxi; 710119, China; (2) Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronics and Information Engineering, Xi'An Jiaotong University, Xi'an, Shaanxi; 710049, China; (3) State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi; 710024, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi; 030006, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11046
Part number:1 of 1
Issue title:Fifth International Symposium on Laser Interaction with Matter
Issue date:2019
Publication year:2019
Article number:1104608
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627581
Document type:Conference article (CA)
Conference name:5th International Symposium on Laser Interaction with Matter, LIMIS 2018
Conference date:November 11, 2018 - November 13, 2018
Conference location:Changsha, China
Conference code:148064
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Chinese Laser Press; Northwest Institute of Nuclear Technology; Shaanxi Province Physical Society; State Key Laboratory of Laser Propulsion and Application; Xi?an Society of Laser and Infrared
Publisher:SPIE
Abstract:A theoretical model based on rate equations for actively Q-switched Er3+-doped ZBLAN fiber laser is built. The operation behaviors and output characteristics of the actively Q-switched fiber laser at 2.8 μm are analyzed. Effects of some important laser parameters, such as pump power levels, reflectivity of the laser output coupler, fiber lengths, Er concentrations, etc., on laser output were investigated. The model and simulating results are useful for design and optimization of actively Q-switched fiber laser at 2.8-μm region.
? COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:22
Main heading:Pumping (laser)
Controlled terms:Fiber lasers - Glass fibers - Laser tissue interaction - Models - Plasma interactions - Q switching
Uncontrolled terms:Actively Q-switched - Design and optimization - Er concentrations - Midinfrared - Modeling and optimization - Modeling and simulating - Output characteristics - Theoretical modeling
Classification code:744 Lasers - 812.3 Glass - 932.3 Plasma Physics
Numerical data indexing:Size 2.80e-06m
DOI:10.1117/12.2523927

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534745
Title:Thermal vacuum optical performance test system for space laser communication terminal
Authors:Xue, Xun (1, 2, 3); Zhao, Jianke (1); Zhang, Chunmin (2, 3); Liu, Shangkuo (1); Kewei, E. (1); Li, Kun (1); Wang, Zhengfeng (1); Li, Jing (1); Zhang, Jie (1); Hu, Dandan (1); Guo, Yi (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi; 710119, China; (2) School of Science, Xi'An Jiaotong University, Xi'an, Shaanxi; 710049, China; (3) Institute of Space Optics, Xi'An Jiaotong University, Xi'an, Shaanxi; 710049, China
Corresponding author:Xue, Xun(xx@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105215
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:In order to ensure the on-orbit performance of space laser communication terminal(SLCT), the optical performance test under thermal vacuum conditions must be completed on the groud. In this paper, according to the requirements of SLCT, thermal vacuum optical performance test system was designed and developed. Its main testing capabilities include the divergence angle, polarization state, wave aberration, transmission power. Several SLCTs were tested by the system, the results show that the overall performance of the test system is stable and the thermo-optical test of SLCT can be completed well.
? 2019 SPIE.
Number of references:10
Main heading:Aberrations
Controlled terms:Optical communication - Optical links - Photonics - Polarization
Uncontrolled terms:Divergence angle - Optical performance - Reduction systems - Transmitted power - Wavefront aberrations
Classification code:717.1 Optical Communication Systems - 741.1 Light/Optics
DOI:10.1117/12.2522000

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183105632461
Title:GETNET: A General End-To-End 2-D CNN Framework for Hyperspectral Image Change Detection
Authors:Wang, Qi (1); Yuan, Zhenghang (1); Du, Qian (2); Li, Xuelong (3, 4)
Author affiliation:(1) School of Computer Science, Center for OPTical IMagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710072, China; (2) Department of Electrical and Computer Engineering, Mississippi State University, Starkville; MS; 39762, United States; (3) 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 author:Wang, Qi(crabwq@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:1
Issue date:January 2019
Publication year:2019
Pages:3-13
Article number:8418840
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Change detection (CD) is an important application of remote sensing, which provides timely change information about large-scale Earth surface. With the emergence of hyperspectral imagery, CD technology has been greatly promoted, as hyperspectral data with high spectral resolution are capable of detecting finer changes than using the traditional multispectral imagery. Nevertheless, the high dimension of the hyperspectral data makes it difficult to implement traditional CD algorithms. Besides, endmember abundance information at subpixel level is often not fully utilized. In order to better handle high-dimension problem and explore abundance information, this paper presents a general end-To-end 2-D convolutional neural network (CNN) framework for hyperspectral image CD (HSI-CD). The main contributions of this paper are threefold: 1) mixed-Affinity matrix that integrates subpixel representation is introduced to mine more cross-channel gradient features and fuse multisource information; 2) 2-D CNN is designed to learn the discriminative features effectively from the multisource data at a higher level and enhance the generalization ability of the proposed CD algorithm; and 3) the new HSI-CD data set is designed for objective comparison of different methods. Experimental results on real hyperspectral data sets demonstrate that the proposed method outperforms most of the state of the arts.
? 1980-2012 IEEE.
Number of references:35
Main heading:Hyperspectral imaging
Controlled terms:Convolution - Deep learning - Job analysis - Learning systems - Matrix algebra - Neural networks - Pixels - Principal component analysis - Remote sensing - Spectral resolution - Spectroscopy
Uncontrolled terms:Affinity matrix - Change detection - Convolutional Neural Networks (CNN) - Spectral unmixing - Task analysis
DOI:10.1109/TGRS.2018.2849692
Funding details: Number: 2017YFB1002202, Acronym: -, Sponsor: National Key Clinical Specialty Discipline Construction Program of China;Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: 2018KJXX-024, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 61773316, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 3102017AX010, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Manuscript received December 11, 2017; revised May 7, 2018; accepted June 18, 2018. Date of publication July 24, 2018; date of current version December 24, 2018. This work was supported in part by the National Key R&D Program of China under Grant 2017YFB1002202, in part by the National Natural Science Foundation of China under Grant 61773316, in part by the Natural Science Foundation of Shaanxi Province under Grant 2018KJXX-024, in part by the Fundamental Research Funds for the Central Universities under Grant 3102017AX010, and in part by the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences. (Corresponding author: Qi Wang.) Q. Wang is with the School of Computer Science, the Center for OPTical IMagery Analysis and Learning, and the Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China (e-mail: crabwq@gmail.com).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430705
Title:Analysis and suppression of stray light in phenological network multi-spectral camera
Authors:Lei, Jiao (1, 2); Ma, Xiaolong (1); Yang, Jianfeng (1); Xue, Bin (1); Lv, Juan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) Shaanxi Normal University, Xi'an; 710100, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:108381Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The phonological network multi-spectral camera has a complicated internal structure. The camera is a composed of eight lenses, and the light path is divided into eight channels. There is a lot of stray light.So deep stray light analysis and suppression design must be performed to reduce the influence of stray light. This paper analyzes the characteristics of phenological network multi-spectral camera system. Two different baffles are designed, and a regional calculation method is proposed to detect the shading performance of the baffle.Then, the stray light analysis was performed on each channel of the phenological network multispectral camera with TracePro. According to the analysis results, PST curves under different conditions are compared, and the appropriate baffle is selected. Finally, shading performance of the baffle was verified through experiments.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:6
Main heading:Stray light
Controlled terms:Cameras - Manufacture
Uncontrolled terms:Internal structure - Multi-spectral cameras - Regional calculation method - TracePro
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 742.2 Photographic Equipment
DOI:10.1117/12.2511060

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706489067
Title:Mechanism design of a low temperature resistant and high precision zoom lens
Authors:Gao, Bo (1); Qiang, Zihao (1); Yang, Hongtao (1); Chen, Weining (1); Chang, Sansan (1); Zhang, Zhi (1); Fei, Jiaqi (1); Zhang, Yue (1); Zhang, Guangdong (1); Zhao, Yue (1); Fan, Erlei (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 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:10839
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Issue date:2019
Publication year:2019
Article number:108391Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623200
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144715
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:In the light of optical-electronic imaging system,designed a continuous zoom lens with a optical aperture of 60mm and a zoom range of 18-246mm. Summarized the disadvantages of the former zoom lens and a low temperature resistant and high precision structure,named the special-shaped slide and cam zoom structure is proposed, and carrying out the theoretical analysis and the detailed structural design. Theoretical analysis shows that this kind of structure can make the sliding friction between the cam and the main mirror tube turned into rolling friction,thus reducing the torque demand.it also helps to eliminate the stuck phenomenon of the cam in low temperature environment.The special-shaped slide frame structure can help eliminate the tilt Angle of the moving mirror group in the zoom process,thus reducing the variation of optic axis.In the he final test, the zoom time is not longer than 8s in the environment which temperature is only-45°Ci1/4and the variation of optic axis is smaller than 0.3milliradian,both meet the target requirement.
? 2019 SPIE.
Number of references:6
Main heading:Lenses
Controlled terms:Cams - Friction - Machine design - Manufacture - Mirrors - Optical testing - Temperature
Uncontrolled terms:Continuous zooms - High-precision - Low temperatures - Optic axis - Optical aperture - Optical electronics - Sliding friction - zoom time
Classification code:537.1 Heat Treatment Processes - 601 Mechanical Design - 601.3 Mechanisms - 641.1 Thermodynamics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.80e-02m to 2.46e-01m, Size 6.00e-02m, Time 8.00e+00s
DOI:10.1117/12.2507810

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607109995
Title:Study of light beam tracking based on compound axis control
Authors:Jing, Feng (1, 2); Zhang, Xin (1); Cheng, Zhiyuan (1); Cao, Yu (1); Lian, Xuezheng (1); Yang, Yongqing (1)
Author affiliation:(1) Xi'An Institute Optics and Precision Mechanics, CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of 2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2019
Abbreviated source title:Proc. IEEE Inf. Technol., Netw., Electron. Autom. Control Conf., ITNEC
Part number:1 of 1
Issue title:Proceedings of 2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2019
Issue date:March 2019
Publication year:2019
Pages:1686-1691
Article number:8728977
Language:English
ISBN-13:9781538662434
Document type:Conference article (CA)
Conference name:3rd IEEE Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2019
Conference date:March 15, 2019 - March 17, 2019
Conference location:Chengdu, China
Conference code:148626
Sponsor:Chengdu Global Union Academy 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:Compound axis control technology has the advantage of high-precision dynamic tracking, and is widely used in high-precision electro-optical tracking system, laser communication and other fields. For the applications of airborne and shipboard platforms, the compound axis control system will be seriously affected by the disturbance torque. In order to overcome the influence of the disturbance torque, this paper applies the disturbance observer to the compound axis control to improve the precision of the compound axis control system. The simulation and analysis of the improved compound axis control system prove the effectiveness of the method.
? 2019 IEEE.
Number of references:14
Main heading:Control systems
Controlled terms:Optical communication
Uncontrolled terms:Compound-axis - Dynamic tracking - High-precision - Observer - Torque disturbance
Classification code:717.1 Optical Communication Systems - 731.1 Control Systems
DOI:10.1109/ITNEC.2019.8728977

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506452166
Title:1.8–2.7?μm emission from As-S-Se chalcogenide glasses containing ZnSe: Cr2+ particles
Authors:Yang, Anping (1); Qiu, Jiahua (1); Ren, Jing (2); Wang, Rongping (3); Guo, Haitao (4); Wang, Yuwei (1); Ren, He (1); Zhang, Jian (1); Yang, Zhiyong (1)
Author affiliation:(1) Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou; Jiangsu; 221116, China; (2) Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin, China; (3) Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Laser Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra; ACT; 2600, Australia; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and precision Mechanics, Chinese Academy of Science (CAS), Xi'an; Shaanxi; 710119, China
Corresponding author:Yang, Zhiyong(yangzhiyong@jsnu.edu.cn)
Source title:Journal of Non-Crystalline Solids
Abbreviated source title:J Non Cryst Solids
Volume:508
Issue date:15 March 2019
Publication year:2019
Pages:21-25
Language:English
ISSN:00223093
CODEN:JNCSBJ
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Mid-infrared (MIR) light sources are indispensable in modern photonic society. In this work, the composites of the As-S-Se chalcogenide glasses containing MIR-emitting ZnSe: Cr2+ submicron-particles are fabricated by two methods, melt-quenching and hot-pressing. The MIR refractive index, transmittance and photoluminescence properties are investigated and compared in the composites prepared by the two methods. Benefiting from the wide glass forming region of the As-S-Se system, it is possible, by tuning the glass composition, to find a glass (e.g., As40S57Se3) with the refractive index well matching that of the ZnSe: Cr2+ crystal. The composites prepared by the melt-quenching method have higher MIR transmittance, but the MIR emission can only be observed in the samples prepared by the hot-pressing technique. The corresponding reasons are discussed based on microstructural analyses. The results reported in this article could provide helpful theoretical and experimental information for making novel broadband MIR-emitting sources based on chalcogenide glasses.
? 2019 Elsevier B.V.
Number of references:25
Main heading:Selenium compounds
Controlled terms:Chalcogenides - Chromium compounds - Glass - Hot pressing - II-VI semiconductors - Infrared devices - Light sources - Quenching - Refractive index - Zinc compounds
Uncontrolled terms:As-S-Se chalcogenide glass - Chalcogenide glass - Emission properties - Glass forming region - Melt quenching method - Microstructural analysis - Midinfrared - Photoluminescence properties
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 804.2 Inorganic Compounds - 812.3 Glass
DOI:10.1016/j.jnoncrysol.2019.01.007
Funding details: Number: 51872055, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61405080, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475189, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61575086, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (61575086, 61405080, 51872055,61475189), the Priority Academic Program Development of Jiangsu Higher Education Institutions, and Jiangsu Collaborative Innovation Centre of Advanced Laser Technology and Emerging Industry.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183905870529
Title:Ultra-thin carbon fiber mirrors: nickel plated, optical fabrication and thermal deformation test
Authors:Xu, Liang (1); Xie, Yongjie (1); Wang, Yongjie (1); Ding, Jiaoteng (1); Ma, Zhen (1); Fan, Xuewu (1)
Author affiliation:(1) Xi'an Institute of Optics & Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710068, China
Corresponding author:Xu, Liang(liangx@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:176
Issue date:January 2019
Publication year:2019
Pages:85-92
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:The aperture of space remote sensing camera is increasing, and the demand for lighter weight is getting higher and higher. With the advancement of active optics, the thickness of optical components has gradually grown to light and thin. It is extremely difficult to develop ultrathin mirrors using brittle materials such as traditional optical glass and silicon carbide. Due to advantages such as low density, high specific stiffness, low thermal expansion coefficient, toughness, and additive rapid manufacturing properties, carbon fiber reinforced plastic (CFRP) is one of potential applications for large-diameter ultra-thin mirrors. However, the carbon fiber composite material is a two-phase material that cannot be used as optical surface and must be surface-modified. In this paper, the surface modification of CFRP substrate was carried out by chemical nickel plating and nickel electroplating. The modified nickel layer covers all surfaces of CFRP substrate, and nickel layers satisfying the thickness, bonding force, and internal stress requirements. A Φ100 mm aperture ultra-thin carbon fiber mirror developed, after optical fabricating, its surface accuracy RMS is better than λ/15. Thermal deformation analysis and test show that the thermal deformation of ultra-thin carbon fiber mirrors is mainly manifested by the change of radius of curvature, which is caused by the thickness error of the nickel layer on the front and rear faces. In addition, although thermal deformation caused by the lamination angle error of CFRP substrate is relatively small in value, it should still be given enough attention, because the astigmatic error produced is hard to eliminate.
? 2018 Elsevier GmbH
Number of references:12
Main heading:Optical fiber fabrication
Controlled terms:Carbon fiber reinforced plastics - Chemical bonds - Chemical modification - Deformation - Errors - Fiber reinforced plastics - Fibers - Mirrors - Nickel plating - Optical glass - Optical testing - Remote sensing - Silicon carbide - Substrates - Surface treatment - Thermal expansion
Uncontrolled terms:Carbon fiber composite - Carbon fiber composite materials - Carbon fiber reinforced plastics (CFRP) - Optical fabrication - Space remote sensing camera - Thermal deformation - Thermal deformation analysis - Ultra-thin
Classification code:539.3 Metal Plating - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 801.4 Physical Chemistry - 804.2 Inorganic Compounds - 817.1 Polymer Products - 951 Materials Science
DOI:10.1016/j.ijleo.2018.09.086

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5550754
Title:Phase Functions of Typical Lunar Surface Minerals Derived for the Hapke Model and Implications for Visible to Near-Infrared Spectral Unmixing
Authors:Yang, Yazhou (1, 2); Li, Shuai (3); Milliken, Ralph E. (2); Zhang, Hao (1, 4); Robertson, Kevin (2); Hiroi, Takahiro (2)
Author affiliation:(1) Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China; (2) Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence; RI, United States; (3) University of Hawaii, Honolulu; HI, United States; (4) Key Laboratory of Spectral Imaging, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zhang, Hao(zhanghao@cug.edu.cn)
Source title:Journal of Geophysical Research: Planets
Abbreviated source title:J. Geophys. Res. E Planets
Volume:124
Issue:1
Issue date:January 2019
Publication year:2019
Pages:31-60
Language:English
ISSN:21699097
E-ISSN:21699100
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:Laboratory spectrophotometric measurements of minerals common on the lunar surface (olivine, pyroxene, plagioclase, and ilmenite) are measured over a wavelength range of 0.4 to 2.5 μm to better understand the effects of the particle phase function (PF; P[g]) on the application of Hapke's radiative transfer model to reflectance spectra of lunar materials. One objective of this work is to determine if accounting for wavelength-dependent photometric effects can improve spectral estimates of mineral abundance in lunar materials, particularly that of ilmenite. We also discuss a two-step calibration method to correct for the non-Lambertian behavior and wavelength dependence of the common reference standard Spectralon. Both a two-term Legendre polynomial representation of the PF and the Henyey-Greenstein PF are examined. We use our results to apply the Hapke radiative transfer model to reflectance spectra of lab mixtures and test the effects of different PF characteristics and assumptions. Laboratory spectra indicate that ilmenite exhibits more backward scattering behavior compared with silicate minerals, which are more forward scattering. We find that the variations in PF can affect derived single-scattering albedo values and thus spectral unmixing results. Because single-scattering contribution dominates the reflectance properties of dark minerals such as ilmenite, large uncertainties in derived single-scattering albedo values can be introduced by small changes in PFs. However, it is observed that the use of a wavelength-dependent PF does not produce significant differences in spectral unmixing results for binary and ternary silicate mixtures.
?2018. American Geophysical Union. All Rights Reserved.
Number of references:36
Controlled terms:ilmenite - laboratory method - lunar crust - olivine - photometer - plagioclase - pyroxene - radiative transfer - spectrophotometry - wavelength
Species terms:Lambertia
Classification code:72.17.1 Moon
DOI:10.1029/2018JE005713
Funding details: Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 11573058, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 11727806, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 201606410049, Acronym: CSC, Sponsor: China Scholarship Council;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 11773023, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: U1631124, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Y. Z. Y. and H. Z. acknowledge supports from Natural Science Foundation of China (U1631124, 11773023, 11573058, and 11727806) and Lunar and Planetary Science Laboratory, Macau University of Science and Technology-Partner Laboratory of Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences (FDCT 039/2013/A2). Y. Z. Y. also acknowledges a scholarship from the China Scholarship Council (201606410049). The new spectrophotometric data have been included in supporting information. The spectra data of those lab mixtures can be found in RELAB database with the spectral file IDs summarized in Table?1. We are grateful to Brett Denevi and an anonymous reviewer for their in-depth comments, edits, and thoughtful suggestions that greatly improved the quality of the manuscript.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190406407392
Title:Two-dimensional simulation of dielectric barrier discharge with ring electrodes at atmospheric pressure
Authors:Wang, Jing (1, 2); Lei, Bingying (1, 2); Li, Jing (1, 2); Xu, Yonggang (3); Zhang, Jingyue (1, 4); Tang, Jie (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Duan, Yixiang (1, 5)
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 Science, Xi'An University of Posts and Telecommunications, Xi'an; 710121, China; (4) Xi'An Institute of Applied Optics, Xi'an; 710065, China; (5) Research Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Chengdu; 610065, China
Source title:Physics of Plasmas
Abbreviated source title:Phys. Plasmas
Volume:26
Issue:1
Issue date:January 1, 2019
Publication year:2019
Article number:013511
Language:English
ISSN:1070664X
E-ISSN:10897674
CODEN:PHPAEN
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:A two-dimensional fluid model was used to investigate the characteristics of helium dielectric barrier discharge (DBD) equipped with ring electrodes at atmospheric pressure. Simulation results show that the transition of discharge also exists as the traditional parallel-plate DBD. The discharge mode translates from the Townsend mode to the glow mode during the rising phase and returns to the Townsend mode in the falling phase of the discharge. Meanwhile, symmetric discharge current and current densities at different radial positions are observed in each cycle, and the current density peak at the radial center of the ring electrode is always higher than that at other positions. In addition, the charged particles follow a periphery-advantage spatial distribution, and the relative temporal variation of charged particles is faster in the periphery than in the central region because of the higher electric field existing there. Moreover, the density of surface charges assembled in the periphery changes faster than that in the central region of the upper dielectric barrier and exhibits an uneven periphery-advantage distribution, which is also ascribed to the higher electric field in the periphery resulted from the ring electrode configuration. Comparing the ring electrode DBD with the traditional one indicates that an inverse discharge structure is observed between the two electrode configurations.
? 2019 Author(s).
Number of references:39
Main heading:Dielectric devices
Controlled terms:Atmospheric pressure - Charged particles - Dielectric materials - Electrodes - Flow control - Glow discharges - Partial discharges
Uncontrolled terms:Dielectric barrier - Dielectric barrier discharges - Discharge currents - Discharge structures - Parallel plates - Temporal variation - Two dimensional fluid model - Two-dimensional simulations
Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials
DOI:10.1063/1.5077079
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 51877210, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475191, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: LSIT201807G, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the National Natural Science Foundation of China (Grant Nos. 51877210 and 61475191), the CAS Light of West China Program (Grant No. XAB2015A08), and the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (Grant No. LSIT201807G).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5514023
Title:Hyperspectral Image Denoising by Fusing the Selected Related Bands
Authors:Zheng, Xiangtao (1); Yuan, Yuan (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning, 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:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:5
Issue date:May 2019
Publication year:2019
Pages:2596-2609
Article number:8527652
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Hyperspectral images (HSIs) convey more useful information than RGB or gray images, which are widely used in many remote sensing tasks. In real scenarios, HSIs are inevitably corrupted by noise because of sensors' imperfectness or atmospheric influence. Recently, many HSI denoising methods have been proposed to utilize the interband information between different spectral bands. However, these methods regard the HSI as a whole and treat the different spectral bands with the same noise level. In fact, the noise levels in different bands are different. Especially, only few certain bands are corrupted by noise, named the target noised bands. Under this circumstance, an HSI denoising method is proposed by considering the band relationship and different noise levels. The target noised bands are adaptively denoised by fusing some selected bands. Specifically, some related but quality superior bands are selected according to the target noised bands. Then, the target noised bands can be denoised by fusing the selected related bands. Experimental results show that the proposed method achieves considerable performances in comparison with several state-of-the-art hyperspectral denoising methods.
? 1980-2012 IEEE.
Number of references:49
Controlled terms:detection method - image analysis - numerical method - remote sensing - satellite imagery - satellite sensor - spectral analysis
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2018.2875304
Funding details: Number: 61472413, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61632081, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDB-SSWJSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: SKLST2017010, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61632081, Grant 61472413, Grant 61772510, and Grant 61806193, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSWJSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST2017010, in part by the CAS "Light of West China" Program under Grant XAB2017B26, and in part by the Xi'an Postdoctoral Innovation Base Scientific Research Project.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307009624
Title:High temperature resistant ultra-short DBR Yb-doped fiber laser
Authors:Wang, Hushan (1, 3); Xiong, Songsong (2); Song, Jiazheng (1, 3); Zhao, Fengyan (1, 3); Yan, Zhijun (4); Hong, Xiaohu (1); Zhang, Ting (1); Zhang, Wei (1); Zhou, Kaiming (1); Li, Cheng (2); Wang, Yishan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China; (3) University of Chinese Academy of Sciences, Beijing; 10049, China; (4) School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan; 430074, China
Corresponding author:Wang, Yishan(yshwang@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:16
Issue date:June 1, 2019
Publication year:2019
Pages:4474-4478
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We present a distributed Bragg reflector (DBR) Yb-doped fiber laser based on a pair of type IA fiber Bragg gratings (FBGs). The high temperature resistant gratings are fabricated in high absorption hydrogen loaded Yb-doped silica fiber by use of a 244 nm argon laser and phase mask method. The DBR laser, with only 10 mm cavity length, exhibits high signal-noise ratio (SNR) of over 50 dB and can survive at 450°C in a long term with stable output power and central wavelength. Besides, the laser has a relatively low temperature sensitivity of 8.9 pm/°C, which contributes to cross-sensitization of stress and temperature.
? 2019 Optical Society of America
Number of references:29
Main heading:DBR lasers
Controlled terms:Argon lasers - Fiber Bragg gratings - Fiber lasers - Fibers - Signal to noise ratio - Silica - Temperature
Uncontrolled terms:Cavity length - Central wavelength - Fiber Bragg gratings (FBGs) - High signals - High-temperature resistant - Low temperature sensitivity - Phase mask method - Yb doped fiber laser
Classification code:641.1 Thermodynamics - 716.1 Information Theory and Signal Processing - 744 Lasers
Numerical data indexing:Decibel 5.00e+01dB, Size 1.00e-02m, Size 2.44e-07m, Temperature 7.23e+02K
DOI:10.1364/AO.58.004474
Funding details: Number: 2016YFF0200700, Acronym: -, Sponsor: -;Number: 61605239, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (NSFC) (61605239, 61690222); CAS-SAFEA International Partnership Program for Creative Research Teams; National Key R&D Program of China (2016YFF0200700, 2017YFB1104400).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007220859
Title:High energy femtosecond laser micromachining with hollow core photonic crystal fiber delivery
Authors:Li, Feng (1); Yang, Zhi (1); Lv, Zhiguo (1); Wang, Yishan (1); Li, Qianglong (1); Wei, Yufeng (1); Yang, Yang (1); Yang, Xiaojun (1); Zhao, Wei (1)
Author affiliation:(1) Department of State Key Laboratory of Transient Optics and Photonics, Xi'an institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Feng(laser_lifeng@opt.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:194
Issue date:October 2019
Publication year:2019
Article number:163093
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:In this paper, we demonstrate a new way to deliver the high energy femtosecond laser with Kagome-type hollow core photonic crystal fiber for micromachining compared to the traditional free space laser delivery. To achieve the high coupling efficiency and overcome the nonlinear effect in the delivery, the coupling system is optimized and the fiber is vacuum pumped to less than 5 mbar. High delivery efficiency more than 90% is achieved. To our best knowledge, this is the highest efficiency of femtosecond laser delivered by Kagome type hollow core fiber. With vacuum pump, we lowered the nonlinear effect and make the laser beam have good beam profile and slightly pulse duration change even in the delivery of laser with the pulse energy of 100 μJ, average power of 20 W, and pulse duration of 234 fs. The whole system is also used to make micromachining of aluminum and stainless steel with good processing quality.
? 2019 Elsevier GmbH
Number of references:15
Main heading:Photonic crystal fibers
Controlled terms:Crystal whiskers - Femtosecond lasers - Fibers - Laser beams - Micromachining - Optical pumping
Uncontrolled terms:Coupling efficiency - Coupling systems - Femtosecond laser micromachining - Hollow core fiber - Hollow core photonic crystal fiber - Laser coupling - Laser micro-machining - Processing quality
Classification code:604.2 Machining Operations - 744.8 Laser Beam Interactions - 933.1.1 Crystal Lattice - 951 Materials Science
Numerical data indexing:Energy 1.00e-04J, Percentage 9.00e+01%, Power 2.00e+01W, Pressure 5.00e+02Pa, Time 2.34e-13s
DOI:10.1016/j.ijleo.2019.163093
Funding details: Number: 2018YFB1108000, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61805274, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National key R&D program of China, (No. 2018YFB1108000); National Natural Science Foundation of China, (No. 61690222, No. 61805274); the CAS/SAFEA International Partnership Program for Creative Research Teams.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190406423128
Title:A novel bowl-shaped microchannel plate with high electron collection efficiency and good time performance
Authors:Chen, Ping (1, 2, 3, 4); Tian, Jinshou (3, 4); Yuan, Xiaohui (1, 2); Wen, Wenlong (3); Wang, Xing (3); Guo, Lehui (3); Liu, Hulin (3); Wei, Yonglin (3); Pei, Chengquan (3); He, Kai (3); Lu, Yu (3); Sai, Xiaofeng (3); Wu, Wenqing (1, 2); Deng, Yanqing (1, 2); Zhao, Xu (1, 2)
Author affiliation:(1) Key Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai; 200240, China; (3) Key Laboratory of Ultra-fast photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Chen, Ping(chenping@opt.cn)
Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Abbreviated source title:Nucl Instrum Methods Phys Res Sect A
Volume:936
Issue date:21 August 2019
Publication year:2019
Pages:534-536
Language:English
ISSN:01689002
CODEN:NIMAER
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Owing to the severe loss of photoelectrons striking at the input electrode of conventional microchannel plate (MCP), photoelectron collection efficiency (CE) of devices based on traditional MCP fluctuates around the MCP open area ratio and cannot make a breakthrough. Photoelectron backscattering from the MCP surface also causes late pulses smearing timing and spatial performance. In this work, a novel bowl-shaped MCP with an open area ratio higher than 90% whose input electrode is coated by a thin film with high secondary electron emission yield (SEY) is proposed as an effective approach to improve CE and suppress late pulses. A three-dimensional MCP-PMT model is developed in CST Studio Suite to evaluate CE and time performance of the bowl-shaped MCP, and compared with the traditional one. Results show that CE of the PMT based on the bowl-shaped MCP is nearly 100% and the delayed pulse is less than 2%. This indicates that good temporal and spatial resolution can be achieved with the bowl-shaped MCP.
? 2019 Elsevier B.V.
Number of references:10
Main heading:Image storage tubes
Controlled terms:Efficiency - Electrodes - Microchannels - Photoelectrons - Photons - Rayon fabrics - Secondary emission
Uncontrolled terms:Collection efficiency - Electron collections - Late pulse - MCP-PMT - Micro channel plate - Photoelectron collection efficiency - Secondary electron emissions - Temporal and spatial
Numerical data indexing:Percentage 1.00e+02%, Percentage 2.00e+00%, Percentage 9.00e+01%
DOI:10.1016/j.nima.2018.11.145
Funding details: Number: XAB2017B12, Acronym: -, Sponsor: China Academy of Chinese Medical Sciences;Number: 2018JQ1087, Acronym: -, Sponsor: Shaanxi Provincial Science and Technology Department;Number: 11805267, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by grants from Shaanxi Provincial Department of Science and Technology, China (Grant No. 2018JQ1087 ) and Xi’an Branch of Chinese Academy of Sciences, China (Grant No. XAB2017B12 ) and National Natural Science Foundation of China (Grant No. 11805267 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20182205257476
Title:Does being multi-headed make you better at solving problems? A survey of Physarum-based models and computations
Authors:Gao, Chao (1); Liu, Chen (2); Schenz, Daniel (3); Li, Xuelong (4); Zhang, Zili (1); Jusup, M. (5, 6); Wang, Zhen (7); Beekman, Madeleine (8); Nakagaki, Toshiyuki (5, 9)
Author affiliation:(1) College of Computer and Information Science, College of Software, Southwest University, Chongqing; 400715, China; (2) Center for Ecology and Environmental Sciences, Northwestern Polytechnical University, Xi'an; 710072, China; (3) Graduate School of Life Science, Hokkaido University, Sapporo; 060-0808, Japan; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China; (5) Center of Mathematics for Social Creativity, Research Institute for Electronic Science, Hokkaido University, Sapporo; 060-0812, Japan; (6) Institute of Innovative Research, Tokyo Institute of Technology, Tokyo; 152-8552, Japan; (7) School of Mechanical Engineering, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (8) School of Life and Environmental Sciences, The University of Sydney, NSW; 2006, Australia; (9) Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo; 060-0815, Japan
Corresponding author:Liu, Chen(ChenLiu-Bean@hotmail.com)
Source title:Physics of Life Reviews
Abbreviated source title:Phys. Life Rev.
Volume:29
Issue date:July 2019
Publication year:2019
Pages:1-26
Language:English
ISSN:15710645
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Physarum polycephalum, a single-celled, multinucleate slime mould, is a seemingly simple organism, yet it exhibits quasi-intelligent behaviour during extension, foraging, and as it adapts to dynamic environments. For these reasons, Physarum is an attractive target for modelling with the underlying goal to uncover the physiological mechanisms behind the exhibited quasi-intelligence and/or to devise novel algorithms for solving complex computational problems. The recent increase in modelling studies on Physarum has prompted us to review the latest developments in this field in the context of modelling and computing alike. Specifically, we cover models based on (i) morphology, (ii) taxis, and (iii) positive feedback dynamics found in top-down and bottom-up modelling techniques. We also survey the application of each of these core features of Physarum to solving difficult computational problems with real-world applications. Finally, we highlight some open problems in the field and present directions for future research.
? 2018
Number of references:99
Main heading:Problem solving
Controlled terms:Surveys
Uncontrolled terms:Bio-inspired computing - Complex problem solving - Computational problem - Dynamic environments - Intelligent behaviour - Modelling techniques - Physarum polycephalum - Physiological mechanisms
DOI:10.1016/j.plrev.2018.05.002
Funding details: Number: W099102, Acronym: -, Sponsor: Inamori Foundation;Number: FT120100120, Acronym: -, Sponsor: Australian Research Council;Number: XDJK2016A008, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: -, Acronym: -, Sponsor: Ministry of Education, Culture, Sports, Science and Technology;Number: 152503, Acronym: -, Sponsor: Ministry of Education, Culture, Sports, Science and Technology;Number: 61403315, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:We would like to acknowledge the support from the National Natural Science Foundation of China (Nos. 61403315 , 61402379 ) and the Fundamental Research Funds for the Central Universities (No. XDJK2016A008 ) to C.G. and Z.Z.; Ministry of Education, Culture, Sports, Science & Technology ( MEXT ) Scholarship (No. 152503 ) to D.S.; the Research Grant Program of Inamori Foundation to M.J.; the National 1000 Young Talent Plan (No. W099102 ), the Fundamental Research Funds for the Central Universities (No. G2017KY0001 ), and China Computer Federation–Tencent Open Fund (No. IAGR20170119 ) to Z.W.; and the Australian Research Council ( FT120100120 ) to M.B. This work was performed under the Cooperative Research Program of "Network Joint Research Center for Materials and Devices".

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906870619
Title:The near-space wind and temperature sensing interferometer: Forward model and measurement simulation????(Open Access)
Authors:He, Weiwei (1); Wu, Kuijun (2); Feng, Yutao (3); Fu, Di (3); Chen, Zhenwei (2); Li, Faquan (2)
Author affiliation:(1) City College, Wuhan University of Science and Technology, Wuhan; 430083, China; (2) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics, Wuhan; 430071, 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; 710119, China
Corresponding author:Wu, Kuijun(wukuijun@wipm.ac.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:11
Issue:8
Issue date:April 1, 2019
Publication year:2019
Article number:914
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI AG, Postfach, Basel, CH-4005, Switzerland
Abstract:Wind and temperature observation in near space has been playing an increasingly important role in atmospheric physics and space science. This paper reports on the near-space wind and temperature sensing interferometer (NWTSI), which employs a wide-angle Michelson interferometer to observe O2(a1Δg) dayglow near 1.27 μm from a limb-viewing satellite, and presents the instrument modeling and observation simulations from the stratosphere to the mesosphere and lower thermosphere. The characteristics of atmospheric limb-radiance spectra and line selection rules are described. The observational strategy of using two sets of three emission lines with a line-strength difference of one order of magnitude is proved to be suitable for extending altitude coverage. The forward modeling and measurement simulation of the expectedNWTSIobservations are provided, and the measurement uncertainty of the wind and temperature is discussed. The signal-to-noise ratio (SNR) and the limb-view weight work together to affect the precision of the wind and temperature measurements. The simulated results indicate a wind measurement precision of 1 to 3 m/s and a temperature precision of 1 to 3 K over an altitude range from 40 to 80 km, which meets the observing requirement in measurement precision for near-space detection.
? 2019 by the authors.
Number of references:30
Main heading:Atmospheric temperature
Controlled terms:Geophysics - Ionosphere - Michelson interferometers - Remote sensing - Signal to noise ratio - Temperature measurement - Temperature sensors - Uncertainty analysis
Uncontrolled terms:Atmospheric physics - Imaging interferometers - Measurement precision - Measurement uncertainty - Mesosphere and lower thermosphere - Near space - Passive remote sensing - Temperature observations
Classification code:443.1 Atmospheric Properties - 481.3 Geophysics - 716.1 Information Theory and Signal Processing - 922.1 Probability Theory - 941.3 Optical Instruments - 944.5 Temperature Measuring Instruments - 944.6 Temperature Measurements
Numerical data indexing:Size 1.27e-06m, Size 4.00e+04m to 8.00e+04m, Temperature 1.00e+00K to 3.00e+00K, Velocity 1.00e+00m/s to 3.00e+00m/s
DOI:10.3390/rs11080969
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61705253, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors gratefully acknowledge the informative and helpful discussions with Wang Dingyi on theoretical details of this workThis research was funded by the National Natural Science Foundation of China (NSFC), grant number 61705253, 41005019, and the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, grant number LSIT201701D

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193707416809
Title:Research on active polarization imaging experiments and key technologies in smoke and dust environment
Authors:Xie, Meilin (1, 2); Liu, Peng (1, 2); Ma, Caiwen (1); Hao, Wei (1); Huang, Wei (1); Lian, Xuezheng (1); Li, Zhiguo (1); Han, Junfeng (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, China
Corresponding author:Xie, Meilin(524034906@qq.com)
Source title:Optik
Abbreviated source title:Optik
Volume:198
Issue date:December 2019
Publication year:2019
Article number:163309
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:For realizing the engineering application of key technologies in the long-range active polarization imaging system, an experimental platform is built to study the static active polarization imaging technology and related image fusion algorithm in the smoke and dust environment. In the experiments, 532 nm CW laser is used as illumination source after collimation and beam expansion, metal bullet model is used as detection target, smoke environment is created through smoke generator in organic glass hood, polarization direction can be rotated by the polarizer, the images are collected by Lumerera-LM135 camera. The analysis and handling on the images are conducted by the use of the MATLAB software. In the aspects of image information entropy, average gradient, spatial frequency and standard deviation, the polarization imaging effects in various environments are quantitatively compared and analyzed, and the imaging advantages of laser illumination and polarization imaging technology in smoke and dust environment and dim conditions are verified. In order to further improve the imaging quality of active polarization imaging technology, a polarization image fusion algorithm based on fuzzy adaptive is proposed after analyzing a large number of data acquired in the experiment. The experimental results show that the active polarization imaging technology and the improved image fusion algorithm can improve the detection distance of optical system and image contrast, expand the digestible information of images for the long-range dim target imaging in low visibility environment, and provide important data reference and technology support for the application of this technology in shooting range.
? 2019 Elsevier GmbH
Number of references:11
Main heading:Image enhancement
Controlled terms:Continuous wave lasers - Dust - Image analysis - Image fusion - Image quality - Imaging systems - MATLAB - Optical systems - Organic lasers - Polarization - Smoke
Uncontrolled terms:Engineering applications - Experimental platform - Illumination sources - Image fusion algorithms - Image information entropy - Laser illumination - Polarization direction - Polarization imaging
Classification code:451.1 Air Pollution Sources - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 746 Imaging Techniques - 921 Mathematics
DOI:10.1016/j.ijleo.2019.163309

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507361409
Title:Photochromic effect of transparent lead-free ferroelectric KSr2Nb5O15 ceramics
Authors:Cao, Shuyao (1); Gao, Feng (1); Xu, Jie (1); Zhu, Jihong (2); Chen, Qian (1); Guo, Yiting (1); Li, Leilei (1); Liu, Junting (1); Gao, Tong (2); Pawlikowska, Emilia (3); Szafran, Miko&lstrok;aj (3); Cheng, Guanghua (4, 5)
Author affiliation:(1) State Key Laboratory of Solidification Processing, MIIT Key Laboratory of Radiation Detection Materials and Devices, USI Institute of Intelligence Materials and Structure, NPU-QMUL Joint Research Institute of Advanced Materials and Structure, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China; (2) State IJR Center of Aerospace Design and Additive Manufacturing, MIIT Lab of Metal Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China; (3) Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw; 00-664, Poland; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (5) Electronic Information College, Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China
Corresponding author:Gao, Feng(gaofeng@nwpu.edu.cn)
Source title:Journal of the European Ceramic Society
Abbreviated source title:J. Eur. Ceram. Soc.
Volume:39
Issue:16
Issue date:December 2019
Publication year:2019
Pages:5260-5266
Language:English
ISSN:09552219
E-ISSN:1873619X
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Transparent KSr2Nb5O15 (KSN) lead-free ferroelectric ceramics have been synthesized via modified pressureless sintering method. A significant photochromic effect was observed for the transparent KSN ceramics prepared without rare-earth dopant modification. The piezoelectric properties depend on the grain orientations were investigated. The optical transmittance of the KSN ceramics is greater than 40% in the wavelength range of 530–800 nm. After NUV irradiation, the absorbance was enhanced by more than 40% in a broad visible range (more than 79%). The absorbance returned to the initial value after a thermal bleaching process. The results of the cycling tests and response experiments showed the stability and saturation of the photochromic effect. In addition, the possible photochromic mechanism of the KSN ceramics is discussed and the photochromic centers are identified. This transparent KSN ceramics exhibits an obvious photochromic effect and is a potential candidate materials for optical data storage and information recording applications.
? 2019 Elsevier Ltd
Number of references:38
Main heading:Ferroelectric ceramics
Controlled terms:Ceramic materials - Digital storage - Ferroelectricity - Niobium compounds - Optical data storage - Photochromism - Rare earths - Sintering - Strontium compounds
Uncontrolled terms:Information recording - KSr2Nb5O15 - Lead-free ferroelectric ceramics - Lead-free ferroelectrics - Photochromic effects - Piezoelectric property - Pressure-less sintering - Transparent ceramic
Classification code:701.1 Electricity: Basic Concepts and Phenomena - 722.1 Data Storage, Equipment and Techniques - 741.1 Light/Optics - 804.2 Inorganic Compounds - 812.1 Ceramics
Numerical data indexing:Percentage 4.00e+01%, Percentage 7.90e+01%
DOI:10.1016/j.jeurceramsoc.2019.08.009
Funding details: Number: 137-QP-2015, Acronym: -, Sponsor: -;Number: 2015AA0172, Acronym: -, Sponsor: National High-tech Research and Development Program;Number: G2016KY0302, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 51961135301, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: 06450-G2019KY0601, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: -, Acronym: SKLSP, Sponsor: State Key Laboratory of Solidification Processing;Number: 11722219, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (No. 51672219 , 5171101743 , 51702259 ); Excellent Youth Fund of the National Natural Science Foundation of China (No. 11722219 ); China-Poland International Collaboration Fund of National Natural Science Foundation of China (No. 51961135301 ); Foundation of National High Technology Research and Development Program (No. 2015AA0172 ); Fundamental Research Fund for the Central Universities (No. G2016KY0302 ); the Research Foundation of the State Key Laboratory of Solidification Processing (NWPU), China (No. 137-QP-2015 ); and the Fundamental Research Funds for the Central Universities (No. 06450-G2019KY0601 ). We would like to thank the Analytical & Testing Center of Northwestern Polytechnical University for the measurement of XRD, EBSD and PFM. We sincerely thank Xuefang Shi, Senior Engineer of the Analytical & Testing Center of Northwestern Polytechnical University for her help about EBSD analysis. Appendix A

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184606073297
Title:Robust Subspace Clustering by Cauchy Loss Function
Authors:Li, Xuelong (1); Lu, Quanmao (2); Dong, Yongsheng (2, 4); Tao, Dacheng (3)
Author affiliation:(1) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Faculty of Engineering and Information Technologies, UBTECH Sydney Artificial Intelligence Centre, School of Computer Science, University of Sydney, Darlington; 2008, Australia; (4) School of Information Engineering, Henan University of Science and Technology, Luoyang; 471023, China
Corresponding author:Dong, Yongsheng(dongyongsheng98@163.com)
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:30
Issue:7
Issue date:July 2019
Publication year:2019
Pages:2067-2078
Article number:8532126
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Subspace clustering is a problem of exploring the low-dimensional subspaces of high-dimensional data. State-of-the-art approaches are designed by following the model of spectral clustering-based method. These methods pay much attention to learn the representation matrix to construct a suitable similarity matrix and overlook the influence of the noise term on subspace clustering. However, the real data are always contaminated by the noise and the noise usually has a complicated statistical distribution. To alleviate this problem, in this paper, we propose a subspace clustering method based on Cauchy loss function (CLF). Particularly, it uses CLF to penalize the noise term for suppressing the large noise mixed in the real data. This is due to that the CLF's influence function has an upper bound that can alleviate the influence of a single sample, especially the sample with a large noise, on estimating the residuals. Furthermore, we theoretically prove the grouping effect of our proposed method, which means that highly correlated data can be grouped together. Finally, experimental results on five real data sets reveal that our proposed method outperforms several representative clustering methods.
? 2012 IEEE.
Number of references:57
Main heading:Clustering algorithms
Controlled terms:Cluster analysis - Couplings - Matrix algebra
Uncontrolled terms:grouping effect - Loss functions - Noise suppression - Similarity matrix - Sub-Space Clustering
DOI:10.1109/TNNLS.2018.2876327

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207292674
Title:Instability transverse mode phase transition of fiber oscillator for extreme power lasers
Authors:Gao, Wei (1, 2, 3); Zhao, Baoyin (1); Fan, Wenhui (1, 4); Ju, Pei (1, 3); Zhang, Yanpeng (2); Li, Gang (1, 3); Gao, Qi (1, 3); Li, Zhe (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Laboratory of Information Photonic Technique, Xi’an Jiaotong University, Xi’an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:16
Issue date:2019
Publication year:2019
Pages:22393-22407
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:High-power fiber lasers have been widely explored in engineering and science, and improving the beam quality restricted by transverse mode instability (TMI) is waiting to be solved for extra high-power applications. Here, we theoretically propose a phase transition model for understanding TMI in a fiber oscillator. A general dynamics model describing TMI is established by modifying the heat equation, and then a special dynamics model of a two-mode fiber (TMF) oscillator is obtained by applying this general dynamics model to TMF oscillator case. Theoretical analysis shows that there is a reversible phase transition point in this TMF oscillator model, which can well explain the sudden and reversible change of TMI. Based on linear stability analysis near the phase transition point, an analytical threshold formula of TMI is given to calculate the TMI threshold in the TMF oscillator. The calculated results are consistent with the reported experimental results. Furthermore, the relationship between the TMI threshold and several parameters was also discussed in detail such as laser wavelength, pump wavelength, core radius, cladding radius, etc. This theoretical model will be useful to understand and suppress the TMI in fiber oscillators.
? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Number of references:29
Main heading:Fibers
Controlled terms:Fiber lasers - Linear stability analysis - Pumping (laser) - Transition flow
Uncontrolled terms:Dynamics modeling - High power applications - High power fiber lasers - Phase transition model - Phase transition point - Reversible change - Reversible phase transition - Theoretical modeling
Classification code:631.1 Fluid Flow, General - 744.1 Lasers, General - 744.4 Solid State Lasers - 921 Mathematics
DOI:10.1364/OE.27.022393
Funding text:National Key R& D Program of China (2017YFB1104400).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907185127
Title:Percussion drilling on nickel-based alloy with thermal barrier coatings using femtosecond laser
Authors:Zhai, Zhaoyang (1, 2, 3); Wang, Wenjun (1, 2, 3); Mei, Xuesong (1, 2, 3); Li, Ming (4); Li, Xun (4)
Author affiliation:(1) State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an; Shaanxi; 710054, China; (2) Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, 28 West Xianning Road, Xi'an; Shaanxi; 710049, China; (3) School of Mechanical Engineering, Xi'an Jiaotong University, 28 West Xianning Road, Xi'an; Shaanxi; 710049, China; (4) Xi'an Institute of Optics and Precision Mechanics, 17 Xinxi Road, Xi'an; Shaanxi; 710119, China
Corresponding author:Wang, Wenjun(wenjunwang@mail.xjtu.edu.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:194
Issue date:October 2019
Publication year:2019
Article number:163066
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Femtosecond laser with wave length of 800 nm was used to perform percussion drilling experiment on nickel-based alloy with thermal barrier coatings (TBCs) in order to eliminate the damages caused by conventional drilling. Analysis of the experimental results indicated that short pulse duration and high peak power characteristics of femtosecond laser led to good processing effect on nickel-based alloy with TBCs. High quality array of holes with the taper of almost zero was generated, for which the inner diameter was 162 μm and the aspect ratio was 15:1. Femtosecond laser processing had little influence on elementary components and phase structure of coating. This study provides feasible technique involving the use of femtosecond laser for machining film cooling hole on nickel-based alloy with TBCs.
? 2019 Elsevier GmbH
Number of references:25
Main heading:Nickel alloys
Controlled terms:Aspect ratio - Cooling - Femtosecond lasers - Infill drilling - Musical instruments - Nickel coatings - Thermal barrier coatings
Uncontrolled terms:Conventional drilling - Femtosecond laser processing - Film cooling hole - Nickel based alloy - Percussion drilling - Processing effects - Short pulse duration and high peak power - Thermal barrier coating (TBCs)
Classification code:511.1 Oil Field Production Operations - 548.2 Nickel Alloys - 641.2 Heat Transfer - 752.4 Acoustic Generators - 813.2 Coating Materials
Numerical data indexing:Size 1.62e-04m, Size 8.00e-07m
DOI:10.1016/j.ijleo.2019.163066
Funding details: Number: 2016YFB1102502, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Program for Jilin University Science and Technology Innovative Research Team;Number: 91323303, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National key R&D Program of China (grant no. 2016YFB1102502 ), the National Natural Science Foundation of China (grant nos. 51475361 , 91323303 and 51421004 ), and the Program for Changjiang Scholars and Innovative Research Team in University (grant no. IRT_15R54 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607390811
Title:A Molecular Dynamics Study on Self-Assembly of Single-Walled Carbon Nanotubes: From Molecular Morphology and Binding Energy
Authors:Zhang, Jianwei (1, 2, 3); Cui, Jianlei (1, 2, 4, 5); Cheng, Yang (1, 2); Wang, Wenjun (1, 3); He, Xiaoqiao (6); Mei, Xuesong (1, 3)
Author affiliation:(1) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou; 310027, China; (3) Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xi'an; 710049, China; (4) State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai; 200240, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (6) Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
Corresponding author:Cui, Jianlei(cjlxjtu@mail.xjtu.edu.cn)
Source title:Advanced Materials Interfaces
Abbreviated source title:Adv. Mater. Interfaces
Issue date:2019
Publication year:2019
Article number:1900983
Language:English
E-ISSN:21967350
Document type:Article in Press
Publisher:Wiley-VCH Verlag
Abstract:Molecular dynamics simulations are used to reveal the adsorption behavior of modified single-walled carbon nanotubes (M-SWNTs) on the functionalized surfaces (F-surfaces) bound to a silicon dioxide substrate, in order to illustrate the mechanism of patterned self-assembly of SWNTs on the atomic scale. Noncovalent modification strategy with surfactants is adopted to investigate the structural transition of the surfactant on SWNTs in aqueous solution. Core/shell hybrid structures are formed ultimately by the surfactant scrolling onto SWNTs periphery. Two different kinds of silanes are used to control the wettability of the F-surfaces from hydrophobic to hydrophilic. An excluded-volume constraints algorithm is employed to calculate the global energy minimum to rationalize the driving force controlling the behavior evolution. The mechanisms for self-assembly are illustrated in two segments in detail that the electrostatic attraction starts the self-assembly program on the hydrophilic surface, while van der Waals interaction plays an important role in the behavior of nonassembly to the hydrophobic surface. The results are not only helpful to understand many phenomena in the self-assembly process on the atomic scale but also will provide meaningful guidance in fabrication of SWNTs patterns to keep fidelity.
? 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Number of references:36
Main heading:Single-walled carbon nanotubes (SWCN)
Controlled terms:Binding energy - Hydrophilicity - Hydrophobicity - Molecular dynamics - Morphology - Nanotubes - Self assembly - Silica - Surface active agents - Surface chemistry - Van der Waals forces
Uncontrolled terms:Behavior evolution - Electrostatic attractions - Functionalized surfaces - Molecular dynamics simulations - Non-covalent - Silicondioxide substrates - Structural transitions - Van Der Waals interactions
Classification code:761 Nanotechnology - 801.4 Physical Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.1002/admi.201900983

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007224775
Title:Infrared and visible image fusion algorithm based on saliency detection and adaptive double-channel spiking cortical model
Authors:Zhao, C. (1); Huang, Yongdong (1, 2); Qiu, Shi (3)
Author affiliation:(1) Institute of Image Processing and Understanding, North Minzu University, Yinchuan; Ningxia; 750021, China; (2) Center of Mathematics and Information Science, Dalian Minzu University, Dalian; Liaoning; 116600, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710079, China
Corresponding author:Huang, Yongdong(huang_yongdong@163.com)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:102
Issue date:November 2019
Publication year:2019
Article number:102976
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Based on the saliency detection which effectively extracts the saliency information of the image and the adaptive double-channel spiking cortical model (ADSCM) which has the advantages of global coupling, pulse synchronization, less parameters and high computational efficiency, which can well process information in dark areas, we proposed a new infrared and visible image fusion algorithm. Firstly, the infrared and visible images are decomposed into the base layer and the detail layers through the rolling guidance filter (RGF). Secondly, the base layer is fused with an improved saliency detection method, and the detail layers are fused by a directional gradient sum and an improved ADSCM. The experimental results show that the proposed method can also fully extract the target information of the infrared image while preserving the visible background information, in which the fusion effect is better than the traditional fusion algorithms.
? 2019 Elsevier B.V.
Number of references:54
Main heading:Image fusion
Controlled terms:Computational efficiency - Infrared imaging
Uncontrolled terms:Background information - Cortical models - Direction gradient sum - Infrared and visible image - Process information - Pulse synchronization - Saliency detection - Target information
Classification code:723.2 Data Processing and Image Processing - 746 Imaging Techniques
DOI:10.1016/j.infrared.2019.102976
Funding details: Number: 11761001, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors would like to thank the anonymous reviewers and editors for their invaluable suggestion. This work is supported by the National Natural Science Foundation of China (No. 11761001); Leading Talent Project of Science and Technology Innovation of NingXia (No. KJT20 16002); Major Project of North Minzu University (No. ZDZ X201801).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407357498
Title:High-throughput and fast-speed Fourier ptychographic microscopy: A review
Title of translation:高通量快速傅里叶叠层显微成像技术研究进展
Authors:Pan, An (1, 2); 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) 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:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:48
Issue:6
Issue date:June 25, 2019
Publication year:2019
Article number:0603012
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Fourier ptychographic microscopy (FPM) is a promising label-free computational imaging technique with high resolution, wide field-of-view (FOV) and quantitative phase recovery. Due to its flexible setup, promising high-contrast performance without mechanical scanning and interferometric measurements, FPM has wide applications in the digital pathology, observation and dynamic imaging of label-free cells in vitro. In this review, the principle, research status and the latest advances were introduced in several aspects of FPM such as the system calibration methods, high-throughput imaging and high-speed imaging. The current problems and future trends were also presented.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:169
Main heading:Fourier transforms
Controlled terms:Imaging techniques
Uncontrolled terms:Computational imaging - Digital pathologies - Fourier - High speed imaging - High-Throughput Imaging - Interferometric measurement - Mechanical scanning - Phase retrieval
Classification code:746 Imaging Techniques - 921.3 Mathematical Transformations
DOI:10.3788/IRLA201948.0603012

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507360364
Title:Study on aerodynamic optimization design method analysis and control algorithm of the pod
Authors:Huang, Wei (1); Xie, Meilin (1, 2); Yang, Xiaoxu (1); Lian, Xuezheng (1); Zhang, Yihang (3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Xi'an, China; (3) School of Aeronautics, Northwestern Polytechnical University, Xi'an, China
Source title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Abbreviated source title:Proc. IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf., ITAIC
Part number:1 of 1
Issue title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Issue date:May 2019
Publication year:2019
Pages:636-640
Article number:8785557
Language:English
ISBN-13:9781538681787
Document type:Conference article (CA)
Conference name:8th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Conference date:May 24, 2019 - May 26, 2019
Conference location:Chongqing, China
Conference code:150447
Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Chongqing University of Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Based on the use and function of the airborne pod, the stability and tracking accuracy indexs are the guarantee of obtaining high-quality images under the flight environment, and also a premise of successfully completing various tasks. Aiming at the aircraft subsonic pod in high-speed flight environment, in order to achieve full spectrum segment detection, the pod adopts the open form to complete pointing and tracking functions through the two-dimensional command motion of the pendulum mirror in the head of the pod. In this paper, the coupling relation, which is aircraft disturbance conversion to the pendulum mirror, is analyzed firstly. Then according to the difficulties about the control of the pendulum mirror in high-speed flight caused by the wind resistance, Reynolds average method and large eddy simulation method are used to calculate the fluid simulation, and the traditional response surface method and the concomitant method based on the control theory are adopted to optimize the shape design of the aerodynamic cover and the open cabin. On the basis of optimization, an acceleration ring is introduced into the control loop to improve the response speed and cope with the adverse torque disturbance environment caused by the window opening. Finally, the control loop is simulated in the Simulink environment. The results show that the stability accuracy of system is 0.1366mrad ( RMS), which can be applied to existing mounted pods.
? 2019 IEEE.
Number of references:7
Main heading:Aircraft detection
Controlled terms:Aerodynamics - Aircraft - Artificial intelligence - Flight simulators - Large eddy simulation - Mirrors - Pendulums
Uncontrolled terms:Aerodynamic optimization - Aerodynamic optimization design - Coupling directions - Large Eddy simulation methods - Pointing and tracking - Response surface method - SIMULINK environment - Stability and tracking
Classification code:631 Fluid Flow - 651.1 Aerodynamics, General - 652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 723.4 Artificial Intelligence - 741.3 Optical Devices and Systems - 921 Mathematics
DOI:10.1109/ITAIC.2019.8785557

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607111767
Title:Aperture scalable liquid crystal optically duplicated array of phased array
Authors:He, Xiaoxian (1); Wang, Xiangru (1); Wu, Liang (2); Liu, Xiaopeng (2); Guo, Hongru (1); Huang, Xinning (3); Xie, Xiaoping (3); Tan, Qinggui (4); Cao, Jie (5)
Author affiliation:(1) School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu; 610054, China; (2) School of Physics, University of Electronic Science and Technology of China, Chengdu; 610054, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (4) National Key Laboratory of Science and Technology on Space Microwave, Xi'an; 710100, China; (5) School of Optics and Photonics, Beijing Institute of Technology, Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing; 100081, China
Corresponding author:Wang, Xiangru(xiangruwang@uestc.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:451
Issue date:15 November 2019
Publication year:2019
Pages:174-180
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:To achieve non-mechanical laser beam steering in the scenario of long distance propagation such as free-space laser communication between satellites, large aperture size is an inevitable issue to be considered to narrow the divergence angle of the output beam. Liquid crystal optical phased array, to be one of the solutions of non-mechanical beam steering, has already shown its obvious potential to achieve a relative large aperture on the order of centimeter. To achieve even larger, its driving matrix becomes squared larger. In this paper, we proposed a novel architecture to realize an optical phased array with a scalable aperture. Meanwhile the driving matrix is almost not increased. It provides the feature of a cascade system with a device of spatial phased modulation and an array of duplicating units. Each unit of the duplicating array is consist of a polarization beam splitter and a half wave plate to have the same output optical field distribution as the input beam whose phase front is modulated by a small size spatial modulator. Not only the property of beam deflection is numerically simulated and experimentally verified, but also the property of divergence angle compression and grating lobes limitation are evaluated. Meanwhile, due to the high precision of the experimental alignment, the non-mechanical beam deflection property is still maintained no matter how many the duplicated unit number is. The relative standard derivation steering error is 0.025.
? 2019 Elsevier B.V.
Number of references:24
Main heading:Optical beam splitters
Controlled terms:Communication satellites - Laser beams - Liquid crystals
Uncontrolled terms:Aperture extension - Free space laser communications - Large aperture - Long-distance propagation - Nonmechanical beam steering - Optical phased arrays - Output optical fields - Polarization beam splitters
Classification code:655.2.1 Communication Satellites - 741.3 Optical Devices and Systems - 744.8 Laser Beam Interactions
DOI:10.1016/j.optcom.2019.06.037
Funding details: Number: 2018YFA0307400, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61775026, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871031, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61775026, 61871031) and the National Key R&D Program, China (Grant No.2018YFA0307400).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183805826511
Title:Aberration correction method based on double-helix point spread function
Authors:Wang, Zhaojun (1, 2); Cai, Yanan (1, 2); Liang, Yansheng (1, 2); Dan, Dan (1, 3); Yao, Baoli (1, 3); Lei, Ming (1, 3)
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, No. 17 Xinxi Road, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District Beijing; 100049, China; (3) Xi'an Jiaotong University, No. 28 Xianning West Road, Xi'an, Shaanxi; 710049, China
Corresponding author:Lei, Ming(leiming@opt.ac.cn)
Source title:Journal of Biomedical Optics
Abbreviated source title:J Biomed Opt
Volume:24
Issue:3
Issue date:March 1, 2019
Publication year:2019
Article number:031005
Language:English
ISSN:10833668
E-ISSN:15602281
CODEN:JBOPFO
Document type:Journal article (JA)
Publisher:SPIE
Abstract:Point spread function (PSF) engineering has met with lots of interest in various optical imaging techniques, including super-resolution microscopy, microparticle tracking, and extended depth-of-field microscopy. The intensity distributions of the modified PSFs often suffer from deteriorations caused by system aberrations, which greatly degrade the image contrast, resolution, or localization precision. We present an aberration correction method using a spiral-phase-based double-helix PSF as an aberration indicator, which is sensitive and quantitatively correlated to the spherical aberration, coma, and astigmatism. Superior to the routine iteration-based correction methods, the presented approach is iteration-free and the aberration coefficients can be directly calculated with the measured parameters, relieving the computing burden. The validity of the method is verified by both examining the intensity distribution of the conventional Gaussian PSF in three dimensions and observing muntjac skin fibroblast cells. This iteration-free correction method has a potential application in PSF engineering systems equipped with a spatial light modulator.
? 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:39
Main heading:Aberrations
Controlled terms:Adaptive optics - Cell culture - Electromagnetic wave attenuation - Iterative methods - Light modulators - Optical transfer function
Uncontrolled terms:Aberration coefficients - Aberration correction - Double-helix point-spread functions - Extended depth-of-field microscopies - iteration-free - Optical imaging technique - Spatial light modulators - Super-resolution microscopy
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 921.6 Numerical Methods
DOI:10.1117/1.JBO.24.3.031005
Funding details: Number: 2017YFC0110100, Acronym: -, Sponsor: -;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61522511, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 91750106, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was supported by the National Key Research and Development Program of China (2017YFC0110100), and the Natural Science Foundation of China (61522511, 91750106, and 81427802).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007218513
Title:Spatiotemporal interest point detector exploiting appearance and motion-variation information
Authors:Li, Yanshan (1); Li, Qingteng (1); Huang, Qinghua (2, 3, 4); Xia, Rongjie (1); Li, Xuelong (4)
Author affiliation:(1) Shenzhen University, ATR National Key Laboratory of Defense Technology, Shenzhen, China; (2) Northwestern Polytechnical University, School of Mechanical Engineering, Center for Optical Imagery Analysis and Learning, Xi'an, Shaanxi, China; (3) South China University of Technology, School of Electronic and Information Engineering, Guangzhou, China; (4) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, Shaanxi, China
Corresponding author:Li, Yanshan(lys@szu.edu.cn)
Source title:Journal of Electronic Imaging
Abbreviated source title:J. Electron. Imaging
Volume:28
Issue:3
Issue date:May 1, 2019
Publication year:2019
Article number:033002
Language:English
ISSN:10179909
E-ISSN:1560229X
CODEN:JEIME5
Document type:Journal article (JA)
Publisher:SPIE
Abstract:As a local invariant feature of videos, the spatiotemporal interest point (STIP) has been widely used in computer vision and pattern recognition. However, existing STIP detectors are generally extended from detection algorithms constructed for local invariant features of two-dimensional images, which does not explicitly exploit the motion information inherent in the temporal domain of videos, thus weakening the performance of existing STIP detectors in a video context. To remedy this, we aim to develop an STIP detector that uniformly captures appearance and motion information for video, thus yielding substantial performance improvement. Specifically, under the framework of geometric algebra, we first develop a spatiotemporal unified model of appearance and motion-variation information (UMAMV), and then a UMAMV-based scale space of the spatiotemporal domain is proposed to synthetically analyze appearance information and motion information in a video. Based on this model, we propose an STIP feature of UMAMV-SIFT that embraces both appearance and motion variation information of the videos. Three datasets with different sizes are utilized to evaluate the proposed model and the STIP detector. We present experimental results to show that the UMAMV-SIFT achieves state-of-the-art performance and is particularly effective when dataset is small.
? 2019 SPIE and IS&T.
Number of references:78
Main heading:Pattern recognition
Controlled terms:Algebra
Uncontrolled terms:Detection algorithm - Geometric Algebra - Local invariant features - Spatio-temporal domains - Spatio-temporal interest points - State-of-the-art performance - Two dimensional images - Video
Classification code:921.1 Algebra
DOI:10.1117/1.JEI.28.3.033002
Funding details: Number: 61372007, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61401286, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61571193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61771319, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was partially supported by the National Natural Science Foundation of China (Nos. 61771319, 61401286, 61571193, and 61372007), the Natural Science Foundation of Guangdong Province (No. 2017A030313343), the Project of Science and Technology Department of Guangdong Province (Nos. 2014A050503020, 2016A010101021, 2016A010101022, and 2016A010101023), the Science and Technology Program of Guangzhou (No. 201704020134), and Shenzhen Science and Technology Project (Nos. JCYJ20180507182259896 and JCYJ20160307143441261).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307003979
Title:One-dimensional solitons in fractional Schr?dinger equation with a spatially periodical modulated nonlinearity: Nonlinear lattice
Authors:Zeng, Liangwei (1, 2); Zeng, Jianhua (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:11
Issue date:June 1, 2019
Publication year:2019
Pages:2661-2664
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:The existence and stability of stable bright solitons in one-dimensional (1D) fractional media with a spatially periodical modulated Kerr nonlinearity (nonlinear lattice), supported by the recently introduced nonlinear fractional Schr?dinger equation, are demonstrated by means of the linear-stability analysis and in direct numerical simulations. Both 1D fundamental and multipole solitons (in forms of dipole and tripole ones) are found, which occupy one or three cells of the nonlinear lattice, respectively, depending on the soliton’s power. We find that the profiles of the predicted soliton families are impacted intensely by the Lévy index α, and so are their stability. The soliton families are stable if α exceeds a threshold value, below which the balance between fractional-order diffraction and the spatially modulated focusing nonlinearity will be broken.
? 2019 Optical Society of America.
Number of references:34
Main heading:Solitons
Controlled terms:Control nonlinearities - Linear stability analysis - Nonlinear equations
Uncontrolled terms:Bright solitons - Dinger equation - Existence and stability - Fractional order - Kerr nonlinearity - Nonlinear lattices - Spatially modulated - Threshold-value
Classification code:731.1 Control Systems - 921 Mathematics
DOI:10.1364/OL.44.002661
Funding details: Number: 2016357, Acronym: -, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61690224, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61690222, 61690224); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2016357).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432490
Title:Design of the front window of full-disc vector magnetograph
Authors:Wang, Xingfeng (1, 2); Li, Fu (1); Chen, Guoqing (1, 2); Lv, Juan (1); Lu, Zhizhou (1, 2); Yang, Jianfeng (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; 101408, China
Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083713
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Full-disc vector magnetograph (FMG) is one of the main loads in the Advanced Space-based Solar Observatory. FMG is used to realize scientific goals of observing full-disk vector magnetic field with center wavelength of 532.4 nm. The optical system of FMG consists of polarized optical system and imaging optical system, and the imaging optical system composes of the front window and telescope system. The front window has the capability for providing proper situation for scientific observation by absorbing high energy of solar irradiance coming from space while reflecting wavelength of non-scientific investigation beyond wavelength of 532.4±5 nm. The study analyzed the influence of complex space environment on optical glasses. As a result, the material of fused silica, while two pieces of flat glass parallel with 3mm separation structure and thickness of 15mm are determined. Finally, the results show that design for the front window meet the required specifications.
? 2019 SPIE.
Number of references:15
Main heading:Optical systems
Controlled terms:Fused silica - Glass - Magnetometers - Manufacture - Mirrors - Optical design - Optical glass - Optical testing - Telescopes - Vector spaces
Uncontrolled terms:Imaging optical systems - Reflecting wavelength - Scientific investigation - Scientific observations - Separation structures - Solar irradiances - Space environment - Vector magnetic fields
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 812.3 Glass - 921 Mathematics - 942.3 Magnetic Instruments
Numerical data indexing:Size 1.50e-02m, Size 3.00e-03m, Size 5.32e-07m
DOI:10.1117/12.2504797
Funding details: Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the "Strategic Priority Research Program" of the Chinese Academy of Sciences,

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707146229
Title:Weather recognition via classification labels and weather-cue maps
Authors:Zhao, Bin (1); Hua, Lulu (1); Li, Xuelong (1); Lu, Xiaoqiang (2); Wang, Zhigang (1)
Author affiliation:(1) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China; (2) The Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Pattern Recognition
Abbreviated source title:Pattern Recogn.
Volume:95
Issue date:November 2019
Publication year:2019
Pages:272-284
Language:English
ISSN:00313203
CODEN:PTNRA8
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Although it is of great importance to recognize weather conditions automatically, this task has not been explored thoroughly in practice. Generally, most approaches in the literature simply treat it as a common image classification task, i.e., assigning a certain weather label to each image. However, there are significant differences between weather recognition and common image classification, since several weather conditions tend to occur simultaneously, like foggy and cloudy. Obviously, a single weather label is insufficient to provide a comprehensive description of the weather conditions. In this case, we propose to utilize auxiliary weather-cues, e.g., black clouds and blue sky, for comprehensive weather description. Specifically, a multi-task framework is designed to jointly deal with the weather-cue segmentation task and weather classification task. Benefit from the intrinsic relationships lying in the two tasks, exploring the information of weather-cues can not only provide a comprehensive description of weather conditions, but also help the weather classification task to learn more effective features, and further improve the performance. Besides, we construct two large-scale weather recognition datasets equipped with both weather labels and segmentation masks of weather-cues. Experiment results demonstrate the excellent performance of our approach. The constructed two datasets will be available at https://github.com/wzgwzg/Multitask_Weather.
? 2019 Elsevier Ltd
Number of references:56
Main heading:Classification (of information)
Controlled terms:Image classification - Large dataset - Meteorology
Uncontrolled terms:Classification labels - Segmentation masks - Weather classification - Weather recognition
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1016/j.patcog.2019.06.017

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907215909
Title:High-Dimensional One-Way Quantum Computation Operations with On-Chip Optical D-Level Cluster States
Authors:Relmer, Christian (1, 2); Kues, Michael (1, 3); Sciara, Stefania (1, 4); Roztocki, Piotr (1); Islam, Mehedi (1); Cortes, Luis Romero (1); Zhang, Yanbing (1); Fischer, Bennet (1); Loranger, Sebastien (5); Kashyap, Raman (5, 6); Cino, Alfonso (4); Chu, Sai T. (7); Little, Brent E. (8); Moss, David J. (9); Caspani, Lucia (10); Munro, William J. (11, 12); Azana, Jose (1); Morandotti, Roberto (1, 13, 14)
Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Blvd. Lionel-Boulet, Varennes; J3X 1S2, Canada; (2) John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge; 02138, United States; (3) School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow; G12 8LT, United Kingdom; (4) Department of Energy, Information Engineering and Mathematical Models, University of Palermo, Palermo, Italy; (5) Engineering Physics Department, Polytechnique Montreal, 2900 Blvd. Edouard-Montpetit, Montreal; H3T 1J4, Canada; (6) Electrical Engineering Department, Polytechnique Montreal, 2900 Blvd. Edouard-Montpetit, Montreal; H3T 1J4, Canada; (7) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (8) State Key Laboratory of Transient Optics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (9) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (10) Institute of Photonics, Department of Physics, University of Strathclyde, Glasgow; G1 1RD, United Kingdom; (11) NTT Basic Research Laboratories and NTT Research Center for Theoretical Quantum Physics, NTT Corporation, Kanagawa, Japan; (12) National Institute of Informatics, Tokyo, Japan; (13) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China; (14) ITMO University, St Petersburg, Russia
Source title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Issue date:May 2019
Publication year:2019
Article number:8750197
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:2019 Conference on Lasers and Electro-Optics, CLEO 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:149135
Sponsor:AdValue Photonics; American Elements; Class5 Photonics; Coherent; et al.; GoFoton
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We implement on-chip generation of high-dimensional hyper-entangled states in the time-and frequency-domain, and transform them into d-level cluster states using a deterministic controlled phase gate. We then demonstrate measurement-based quantum computing operations and show the state's high tolerance towards noise.
? 2019 The Author(s) 2019 OSA.
Number of references:7
DOI:10.23919/CLEO.2019.8750197

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907192633
Title:Influence of Zirconium Salt Materials on the Structure and Properties of LiZr2(PO4)3 Lithium Ion Solid Electrolyte
Authors:Li, Wenlong (1, 2); Liu, Huan (1, 2); Yuan, Kang (1, 2); Yang, Liqing (1); Zhou, Qianqian (1); Wang, Haojing (1); Zhang, Hong (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Li, Wenlong(liwenlong@opt.cn)
Source title:Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Abbreviated source title:Xiyou Jinshu Cailiao Yu Gongcheng
Volume:48
Issue:4
Issue date:April 1, 2019
Publication year:2019
Pages:1298-1303
Language:Chinese
ISSN:1002185X
CODEN:XJCGEA
Document type:Journal article (JA)
Publisher:Rare Metals Materials and Engineering Press
Abstract:Samples of LiZr2(PO4)3 compound with pure phase, adopting the method of solid phase and liquid phase method, were obtained by pressureless sintering from different zirconium salt raw materials. And LiZr2(PO4)3 Li-ion solid electrolytes were characterized through X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical impedance (EIS). Analyzing the results of the test, the influence of different zirconium salt raw materials on the structure and performance of LiZr2(PO4)3 solid electrolytes was studied. The results show that the room-temperature stable α-LiZr2(PO4)3 (rhombohedral phase) was prepared from zirconium acetate. While synthetic LiZr2(PO4)3 prepared from the other three kinds of zirconium salt raw materials exists in triclinic phase. Rhombohedral phase LiZr2(PO4)3 lithium ion solid state electrolyte sample prepared from different zirconium raw materials shows the highest total conductivity of 2.25×10-5 S/cm, and the lowest activation energy of 0.28 eV.
? 2019, Science Press. All right reserved.
Number of references:17
Main heading:Zirconium compounds
Controlled terms:Activation energy - Ionic conduction in solids - Ionic conductivity - Ions - Lithium - Lithium compounds - Lithium-ion batteries - Potentiometric sensors - Scanning electron microscopy - Sintering - Solid electrolytes - Solid-State Batteries
Uncontrolled terms:Electrochemical impedance - Li-ion secondary batteries - Liquid-phase method - LiZr2(PO4)3 - Pressure-less sintering - Solid-state electrolyte - Structure and performance - Structure and properties
Classification code:542.4 Lithium and Alloys - 701.1 Electricity: Basic Concepts and Phenomena - 803 Chemical Agents and Basic Industrial Chemicals
Numerical data indexing:Electron_Volt 2.80e-01eV

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207291608
Title:Cylindrically Focused Nonablative Femtosecond Laser Processing of Long-Range Uniform Periodic Surface Structures with Tunable Diffraction Efficiency
Authors:Huang, Ji (1); Jiang, Lan (1); Li, Xiaowei (1); Wei, Qunshuo (2); Wang, Zhipeng (1); Li, Bohong (1); Huang, Lingling (2); Wang, Andong (1); Wang, Zhi (1); Li, Ming (3); Qu, Liangti (4, 5); Lu, Yongfeng (6)
Author affiliation:(1) Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, China; (2) School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China; (5) School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing; 100081, China; (6) Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln; NE; 68588-0511, United States
Corresponding author:Li, Xiaowei(lixiaowei@bit.edu.cn)
Source title:Advanced Optical Materials
Abbreviated source title:Adv. Opt. Mater.
Issue date:2019
Publication year:2019
Article number:1900706
Language:English
E-ISSN:21951071
Document type:Article in Press
Publisher:Wiley-VCH Verlag
Abstract:Periodic surface structures are core components for controlling the dispersion and steering characteristics of light. Here, a mask-free approach using nonablative femtosecond laser processing is proposed and demonstrated to fabricate extremely long-range uniform periodic surface structures on silicon with tunable diffraction efficiency. First, a cylindrically focused femtosecond laser scans over silicon substrates to efficiently produce large-area periodic modified stripes in a nonablation regime. Second, the modified stripes act as fine etch stops to generate the desired structures on sample surfaces during the subsequent chemical etching process. The structures produced by the method achieve optimal long-range uniformity compared to the reported laser-induced periodic surface structures, which possess a minimum divergence of structure orientation angles of <5°. In addition, the optical characteristics of the prepared structures are measured experimentally. Distinguishable polychromatic diffraction patterns can be clearly observed by broadband light irradiation. Significantly, the chemical etching process endues the structures with ingenious morphology controllability, so that the diffraction efficiency of the incident light can be flexibly tuned, which exhibits a near-linear function of the etching duration. Such morphology-controllable periodic surface structures may facilitate applications in broad fields, such as optical communications and optical sensors.
? 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Number of references:62
Main heading:Morphology
Controlled terms:Diffraction efficiency - Efficiency - Etching - Femtosecond lasers - Optical communication
Uncontrolled terms:Chemical-etching process - Femtosecond laser processing - Focused femtosecond lasers - Laser-induced periodic surface structures - long-range uniformity - Optical characteristics - Periodic surface structures - Steering characteristics
Classification code:717.1 Optical Communication Systems - 802.2 Chemical Reactions - 913.1 Production Engineering - 951 Materials Science
DOI:10.1002/adom.201900706

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191206671512
Title:Optical vortex shaping via a phase jump factor
Authors:Ma, Haixiang (1); Li, Xinzhong (1); Zhang, Hao (1); Tang, Jie (2); Li, Hehe (1); Tang, Miaomiao (1); Wang, Jingge (1); Cai, Yangjian (3, 4)
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) Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan; 250014, China; (4) School of Physical Science and Technology, Soochow University, Suzhou; 215006, China
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:6
Issue date:2019
Publication year:2019
Pages:1379-1382
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Topological charge (TC) of an optical vortex (OV) is a crucial parameter. We propose two factors, namely, the phase jump factor and the phase gradient factor, to replace the parameter of TC through unwrapping the TC definition integral. Based on these two factors, we report on a novel OV, referred to as the remainder-phase optical vortex (ROV). The properties of the ROV are studied in depth by adjusting these two factors. Results show that the phase gradient factor determines the total orbital angular momentum (OAM), whereas the phase jump factor decides the number of split unit vortices and reshapes the structure of the OAM distribution. This work provides a novel OV with controllable OAM distribution, which will open up new applications such as particle manipulation, beam shaping, and micro-fabrication.
? 2019 Optical Society of America.
Number of references:16
Main heading:Vortex flow
Controlled terms:Angular distribution
Uncontrolled terms:Beam-shaping - Crucial parameters - New applications - Optical vortices - Orbital angular momentum - Particle manipulation - Phase gradient - Topological charges
Classification code:631.1 Fluid Flow, General
DOI:10.1364/OL.44.001379
Funding details: Number: 11525418, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11704098, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775052, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 91750201, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61775052, 11704098, 11525418, 91750201).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607088941
Title:A dual-wavelength Q-switched fiber laser based on reduced graphene oxides
Authors:Su, Yulong (1, 2, 3); Huang, Xinning (1, 3); Hu, Hui (1); Wen, Yu (4); Xie, Xiaoping (1, 3); Si, Jinhai (2); Wang, Yishan (1, 3); Zhao, Wei (1, 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 (CAS), Xi'an; 710119, China; (2) Key Lab. for Phys. Electronics and Devices of the Min. of Educ. and Shaanxi Key Lab of Info. Photonic Tech., School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences (UCAS), Beijing; 100049, China; (4) Xi'an Communication Institute, Xi'an; 710119, China
Corresponding author:Huang, Xinning(honeyhxn@opt.ac.cn)
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:29
Issue:6
Issue date:April 11, 2019
Publication year:2019
Article number:065101
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:This report demonstrates a dual-wavelength stable Q-switched Er-doped fiber (EDF) laser with a reduced graphene oxide (rGO)-based saturable absorber. The rGO is prepared by depositing the graphene oxide on fluorine mica (FM) using a thermal reduction method. The modulation depth and saturable intensity of rGO/FM are measured to be 5.8% and 73.6 MW cm-2. By employing the rGO/FM film in the EDF laser cavity, stable dual-wavelength Q-switching operation is achieved. The two wavelength peaks locate at 1531.84 nm and 1558.14 nm. The shortest pulse duration is 1.83 μs. The maximum output power is measured to be 14.65 mW, corresponding to the maximum single pulse energy of 154.34 nJ. The experimental results evidently show that the rGO is a promising type of nonlinear material.
? 2019 Astro Ltd.
Number of references:33
Main heading:Graphene
Controlled terms:Fiber lasers - Mica - Q switching - Saturable absorbers - Silicate minerals
Uncontrolled terms:Maximum output power - Nonlinear materials - Q-switched - Q-switched fiber lasers - Reduced graphene oxides - Reduced graphene oxides (RGO) - Single pulse energy - Switching operations
Classification code:482.2 Minerals - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally
Numerical data indexing:Energy 1.54e-07J, Percentage 5.80e+00%, Power 1.46e-02W, Size 1.53e-06m, Size 1.56e-06m, Surface_Power_Density 7.36e+11W/m2, Time 1.83e-06s
DOI:10.1088/1555-6611/ab0d12
Funding text:This work is supported by the National Key Research and Development Program of China (2017YFC0803900, 2017YFC0803909) and the National Natural Science Foundation of China (Nos. 9163801).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107262576
Title:Structural parameters optimization of lens hood based on a kind of surrogate model
Authors:Song, Yang (1); Chai, Wenyi (1); Xin, Wei (1); Xu, Yang (1); Hu, Yongming (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, No.17 Xinxi Road, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11170
Part number:1 of 1
Issue title:14th National Conference on Laser Technology and Optoelectronics, LTO 2019
Issue date:2019
Publication year:2019
Article number:1117002
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510630468
Document type:Conference article (CA)
Conference name:14th National Conference on Laser Technology and Optoelectronics, LTO 2019
Conference date:March 17, 2019 - March 20, 2019
Conference location:Shanghai, China
Conference code:149832
Publisher:SPIE
Abstract:With the wide use of earth-based laser communication system, more and more engineers like to pursue the design of lightweight structure. Nowadays, engineers often firstly depend on the project experience to design the lens hood, then make analysis based on finite element method to verify its feasibility, but it costs too much time. The paper attempts to give a new optimization design method. Surrogate model are widely used in the fields of aerodynamics parameters optimization, but barely used in design of optical structure. The paper makes an optimal design about lens hood with wide aperture based on surrogate model. First of all, the paper generates some samples by finite element method; secondly, uses the samples to get the surrogate model by surface interpolation; then finds the optimal solution by surrogate model and constraint conditions. The aperture of the lens hood in this paper is 450 mm. One end of the lens hood is attached to main structure, and the other end is free. Middle part of the lens hood is supported by rods which are made of carbon fiber. The optimization variables in this paper is the thickness of the lens hood and the location of the supports robs. The purpose of the optimization is to find the case that the weight is light and displacement of the free end is small. It will not let the miscellaneous light make a negative effect on incident or outgoing path of light. In other words, it will ensure the quality of imagining or effect of detection. The appropriate solution is found by the method proposed in this paper.
? 2019 SPIE.
Number of references:8
Main heading:Structural design
Controlled terms:Carbon fibers - Finite element method - Integrated optics - Interpolation - Optimal systems - Optoelectronic devices - Shape optimization - Structural optimization
Uncontrolled terms:Constraint conditions - Optimal design - Optimization variables - Parameters optimization - Project experiences - Structural parameter - Surface interpolation - Surrogate model
Classification code:408.1 Structural Design, General - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 921.5 Optimization Techniques - 921.6 Numerical Methods - 961 Systems Science
Numerical data indexing:Size 4.50e-01m
DOI:10.1117/12.2531069

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191606775115
Title:Dimensionality reduction based on parallel factor analysis model and independent component analysis method
Authors:Yan, Ronghua (1, 2); Peng, Jinye (1, 3); Ma, Dongmei (4)
Author affiliation:(1) Northwestern Polytechnical University, School of Electronics and Information, Xi'an, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (3) Northwest University, School of Information and Technology, Xi'an, China; (4) Xi'An-Janssen Pharmaceutical Ltd., Xi'an, China
Corresponding author:Yan, Ronghua(yanronghua@opt.ac.cn)
Source title:Journal of Applied Remote Sensing
Abbreviated source title:J. Appl. Remote Sens.
Volume:13
Issue:1
Issue date:January 1, 2019
Publication year:2019
Article number:014532
Language:English
E-ISSN:19313195
CODEN:JARSC4
Document type:Journal article (JA)
Publisher:SPIE
Abstract:In hyperspectral image (HSI) analysis, dimensionality reduction is a preprocessing step for HSI classification. Independent component analysis (ICA) reduces the spectral dimension and does not utilize the spatial information of the HSI. To solve it, tensor decompositions have been successfully applied to joint noise reduction in spatial and spectral dimensions of HSIs, such as parallel factor analysis (PARAFAC). However, the PARAFAC method does not reduce the dimension in the spectral dimension. We proposed a method to improve it, which combines ICA and PARAFAC to reduce both the dimension in the spectral dimension and the noise in the spatial and spectral dimensions. The experimental results indicate that this method improves the classification compared with the previous methods.
? 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:25
Main heading:Factor analysis
Controlled terms:Hyperspectral imaging - Image analysis - Independent component analysis - Multivariant analysis - Noise abatement - Spectroscopy - Tensors
Uncontrolled terms:Dimensionality reduction - Independent component analysis(ICA) - Independent components - Parallel factor analysis - Pre-processing step - Spatial informations - Spectral dimensions - Tensor decomposition
Classification code:751.4 Acoustic Noise - 921.1 Algebra - 922 Statistical Methods - 922.2 Mathematical Statistics
DOI:10.1117/1.JRS.13.014532
Funding text:This work was supported by the National Natural Science Foundation (Grant No. 61272285) and Program for Changjiang Scholars and Innovative Research Team in University (IRT13090). The authors declare that they have no conflicts of interests.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184606082166
Title:Experimental demonstration of quasi-omni-directional transmitter for underwater wireless optical communication based on blue LED array and freeform lens
Authors:Han, Biao (1, 2); Zhao, Wei (1); Zheng, Yunqiang (1); Meng, Jiacheng (1); Wang, Tao (1, 2); Han, Yi (1); Wang, Wei (1, 3); Su, Yulong (1); Duan, Tao (1); Xie, Xiaoping (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CSA), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Joint Laboratory for Ocean Observation and Detection, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China
Corresponding author:Han, Biao(hanbiaoshaanxi@163.com)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:434
Issue date:1 March 2019
Publication year:2019
Pages:184-190
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:In this paper, we propose a transmitter with 150odivergence angle and more than 90% uniformity of radiation intensity for quasi-omni-directional underwater wireless optical communication (UWOC) by applying freeform lens into LED array. We demonstrate its performance under different transmitting directions with 19Mbps data rate and 8m communication distance in an experimental tank whose volume is 20m×20m×14m and attenuation coefficient is about 0.40m?1. The result shows that the variation of bit error rate (BER) is about three orders of magnitude with the help of freeform lens when direction deviation angle is between -75oand +75o, which is reduced five orders compared with the situation without the lens. The presented result is useful to make it easier to establish communication link and improve the performance of UWOC system when transmitter direction shake exists. Also, it implies that we could apply different freeform lenses into LED array to reshape transmitting illumination according to different demands for UWOC application.
? 2018 Elsevier B.V.
Number of references:48
Main heading:Optical communication
Controlled terms:Bit error rate - Lenses - Light emitting diodes - Optical transmitters
Uncontrolled terms:Attenuation coefficient - Communication distance - Experimental demonstrations - Freeform lens - LED arrays - Ocean optics - Three orders of magnitude - Underwater wireless optical communications
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 717.1 Optical Communication Systems - 717.2 Optical Communication Equipment - 723.1 Computer Programming - 741.3 Optical Devices and Systems
Numerical data indexing:Bit_Rate 1.90e+07bit/s, Percentage 9.00e+01%, Size 8.00e+00m
DOI:10.1016/j.optcom.2018.10.037
Funding details: Number: QNLM201716, Acronym: QNLM, Sponsor: Qingdao National Laboratory for Marine Science and Technology;Number: 2017YFC0803900, Acronym: -, Sponsor: -;Number: ZDKJ2017005, Acronym: -, Sponsor: -;Number: XDB06040701, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by National Key R&D Program of China ( 2017YFC0803900 ), Foundation of Qingdao National Laboratory for Marine Science and Technology, China ( QNLM201716 ), Foundation of Chinese Academy of Sciences ( XDB06040701 ), and Scientific Research Programs of Hainan Province, China ( ZDKJ2017005 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430103
Title:A method for optimizing and designing high isolation level Cassegrainian optical antenna
Authors:Zhou, Shao-Pan (1, 2); Xue, Bin (1); Yang, Jian-Feng (1); Liu, Sheng-Run (1, 2); Chen, Guo-Qing (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
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:1083815
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:In order to reduce the optical intensity of backscattering lights of the Cassegrainian optical antenna in the optical system of the laser communication terminal and improve the optical isolation of laser communication system, this paper proposes a method for designing high isolation level Cassegrainian optical antenna by increasing the characteristic value of the optical intensity of backscattering lights E/N. The method aims to improve the optical antenna isolation through reducing the optical intensity of backscattering lights along the incident optical path based on analyzing the theoretical model of the optical intensity of backscattering lights BRDF. A Cassegrainian optical antenna for laser communication is designed in this paper, and the method is used to optimize the isolation of this optical antenna by custom operands in ZEMAX. Then using TracePro software builds the optical structure model of this optical antenna before and after optimization, simulate the optical intensity of backscattering lights of each model, calculate and analyze the isolation of each model by using simulation data respectively. It is show that the backscattering rate of the system decreases from 0.0011956 to 0.00007515, and the isolation decreases from-29.224dB to-41.24dB. Optimization has improved the isolation 12.017dB of the optical system through use the method.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:8
Main heading:Optical communication
Controlled terms:Antennas - Backscattering - Computer software - Design - Fiber optic sensors - Integrated optics - Manufacture - Optical instruments - Optical systems
Uncontrolled terms:Backscattering light - Characteristic value - Custom operand - High isolation - Laser communication terminals - Optical antennae - Optical intensities - Theoretical modeling
Classification code:537.1 Heat Treatment Processes - 717.1 Optical Communication Systems - 723 Computer Software, Data Handling and Applications - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Decibel 1.20e+01dB
DOI:10.1117/12.2505379

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006590140
Title:Nonlinear multimodal interference for ytterbium-doped all-fiber mode-locking noise-like pulse generation
Authors:Lv, Zhiguo (1); Yang, Zhi (1); Song, Dongdong (1); Li, Feng (1); Yang, Xiaojun (1); Yang, Yang (1); Wang, Yishan (1); Li, Qianglong (1); Zhao, Wei (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
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:12
Issue:2
Issue date:February 2019
Publication year:2019
Article number:022004
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:This work demonstrates the generation of the noise-like pulse (NLP) in an all-normal-dispersion passively mode-locked ytterbium-doped ring laser cavity with nonlinear multimodal interference as an equivalent all-fiber saturable absorber, for the first time to the best of our knowledge. Depending on the appropriate optimization of the intra-cavity birefringence and reasonable control of the curving curvature of the multimode fiber, self-started NLP operation can be built and maintained within a wide pump range. Additionally, the effect of the multimode fiber length on the NLP mode-locking performance and the generation of the high power NLP have also been experimentally studied.
? 2019 The Japan Society of Applied Physics.
Number of references:61
Main heading:Fibers
Controlled terms:Curve fitting - Multimode fibers - Natural language processing systems - Passive mode locking - Ring lasers - Saturable absorbers - Ytterbium
Uncontrolled terms:All fiber - All normal dispersions - High power - Intracavities - Multi-modal - Passively mode-locked - Pulse generation - Ytterbium-doped
Classification code:547.2 Rare Earth Metals - 723.2 Data Processing and Image Processing - 741.1.2 Fiber Optics - 744 Lasers - 744.1 Lasers, General - 921.6 Numerical Methods
DOI:10.7567/1882-0786/aaf417

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20185006232053
Title:Correction to: Influence of Layup Sequence on the Surface Accuracy of Carbon Fiber Composite Space Mirrors (Applied Composite Materials, (2019), 26, 1, (219-238), 10.1007/s10443-018-9690-4)
Authors:Yang, Zhiyong (1, 2); Liu, Qingnian (2); Zhang, Boming (1); Xu, Liang (3); Tang, Zhanwen (2); Xie, Yongjie (3)
Author affiliation:(1) School of Material Science and Engineering, Beihang University, Beijing; 100191, China; (2) Aerospace Research Institute of Materials & Processing Technology, Beijing; 100076, China; (3) Xi’an Institute of Optics & Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710068, China
Corresponding author:Yang, Zhiyong(yzy512007@126.com)
Source title:Applied Composite Materials
Abbreviated source title:Appl Compos Mater
Volume:26
Issue:1
Issue date:February 1, 2019
Publication year:2019
Pages:239-247
Language:English
ISSN:0929189X
E-ISSN:15734897
CODEN:APCMEL
Document type:Erratum (ER)
Publisher:Springer Netherlands
Abstract:The original version of this article unfortunately contained mistakes. Below is a list of corrections. The red color font is the final correct text after the modification. Several images in the article that need to be changed are already marked below. (Table presented.).
? 2018, Springer Nature B.V.
Main heading:Carbon fibers
Controlled terms:Ceramic materials - Composite materials
Uncontrolled terms:Carbon fiber composite - Lay-up sequences - Surface accuracy
DOI:10.1007/s10443-018-9740-y

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.ErratuFlg:621590943

 

Accession number:20191606799161
Title:Optimization investigation for high-power 1034 nm all-fiber narrowband Yb-doped superfluorescent source
Authors:Wu, Peng (1, 2); Zhao, Baoyin (1); Zhao, Wei (1); Li, Zhe (1); Gao, Wei (1); Ju, Pei (1); Li, Gang (1); Gao, Qi (1); Wang, Yishan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhao, Baoyin(Joseph.zhao@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:445
Issue date:15 August 2019
Publication year:2019
Pages:187-192
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:An optimization for all-fiber narrowband Yb-doped superfluorescent source with a central wavelength shorter than 1040 nm is conducted theoretically and then verified experimentally using steady-state rate equations. Theoretical investigation indicates that with the increase in fiber length, signal power presents one peak value, but the ratio of signal power to output power is decreasing monotonously. Moreover, a filter with high extinction ratio and a gain fiber with high absorption coefficient can have gain suppression on a long wavelength. One all-fiber superfluorescent source is built experimentally on the basis of the theoretically optimized parameters. The source achieves an output power of 214.64 W with a central wavelength of 1034.18 nm and signal–noise ratio of 30 dB. The output power of the source can have further power scaling with considerable available pump power.
? 2019 Elsevier B.V.
Number of references:16
Main heading:Fibers
Controlled terms:Equations of state
Uncontrolled terms:Absorption co-efficient - Amplified spontaneous emissions - Fiber sources - High extinction ratios - Optimized parameter - Superfluorescent fiber sources - Superfluorescent source - Theoretical investigations
Numerical data indexing:Decibel 3.00e+01dB, Power 2.15e+02W, Size 1.03e-06m, Size 1.04e-06m
DOI:10.1016/j.optcom.2019.04.033
Funding details: Number: 2017YFB1104400, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);
Funding text:This work is supported by the project of National Key Research and Development Program of China (No. 2017YFB1104400).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006599598
Title:A hollow ring-core polymer optical fiber for supra-high bandwidth data communication
Authors:Yuan, Yuan (1, 2); Kong, Depeng (1); Wang, Lili (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,Shanxi Province, 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:441
Issue date:15 June 2019
Publication year:2019
Pages:176-184
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Bandwidth of polymer optical fiber (POF) is severely limited in a few gigabits. In order to solve the toughest problem, a new type of POF, named hollow ring-core POF (HRC-POF) is designed and simulated. Compared with the SI-POF and GI-POF, the proposed HRC-POF can be used for supra-high bandwidth data transmission based on OAM-based space division multiplex. Compared with the reported glass-based hollow ring-core fiber, the HRC-POF provides a number of other advantages, such as low processing temperature, simple manufacturing process, and low cost. The simulated results show that a polystyrene-based HRC-POF can support 30 states (including 26 OAM ones) in the vicinity of 670 nm wavelength, which means that the HRC-POF can create a total of 30 channels for data transmission in POF communication.
? 2019 Elsevier B.V.
Number of references:45
Main heading:Optical fiber communication
Controlled terms:Bandwidth - Data transfer - Optical fibers - Plastic optical fibers - Polymers - Processing
Uncontrolled terms:Fiber design - Fiber optical communications - High-bandwidth data communications - Low processing temperature - Manufacturing process - Ring core - Simulated results - Space division
Classification code:716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 741.1.2 Fiber Optics - 815.1 Polymeric Materials - 913.4 Manufacturing
Numerical data indexing:Size 6.70e-07m
DOI:10.1016/j.optcom.2019.02.055
Funding details: Number: 11474351, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11504416, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61275106, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (11474351, 61275106, 11504416).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006600389
Title:Application research of high-precision laser beam pointing technology in airborne aiming pod
Authors:Xie, Meilin (1, 2); Liu, Peng (1, 2); Ma, Caiwen (1); Hao, Wei (1); Zhang, Furui (1, 2); Huang, Wei (1); Lian, Xuezheng (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, China
Corresponding author:Xie, Meilin(xiemeilin6@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:183
Issue date:April 2019
Publication year:2019
Pages:775-782
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Airborne aiming pod is mainly used for searching, capturing and tracking the target indicated by the laser, and then dropping the laser-guided weapons precisely to complete the close-range support attack or dual-aircraft cooperative instruction/attack. High-precision laser beam pointing technology is the core of the airborne aiming pod, and the accuracy of it is fatal for the realization of the final tactical index. In this paper, the factors affecting the beam pointing accuracy based on the research of airborne aiming pod platform are analyzed. At first, the composition of the pod system and the motion coupling of the composite axis pod are introduced; and then the beam pointing algorithm under the external guidance combined with aircraft disturbance and the effects of atmospheric turbulence and atmospheric attenuation on beam quality, including optical axis drift, beam spread and intensity distribution variation are discussed. Finally, the performance of the pod servo system is simulated and verified in Simulink. The simulation result of the real flight situation with disturbance moment shows that the pointing accuracy of the airborne aiming pod can reach 0.0075 degrees. The data analyzed in this paper can provide technical reference for other aiming photoelectric platforms.
? 2019 Elsevier GmbH
Number of references:10
Main heading:Laser applications
Controlled terms:Air navigation - Aircraft - Aircraft detection - Atmospheric thermodynamics - Atmospheric turbulence - Flight simulators - Laser beams
Uncontrolled terms:Airborne aiming pod - Application research - Atmospheric attenuation - Intensity distribution - Laser beam pointing - Laser guided weapons - Photo-electric platform - Pointing accuracy
Classification code:431.5 Air Navigation and Traffic Control - 443.1 Atmospheric Properties - 652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 744.8 Laser Beam Interactions - 744.9 Laser Applications
DOI:10.1016/j.ijleo.2019.02.152

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191806852016
Title:Linear space-variant optical cryptosystem via Fourier ptychography
Authors:Pan, An (1, 2); Wen, Kai (3); Yao, Baoli (1, 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) College of Physics and Information Technology, Shaanxi Normal University, Xi’an; 710071, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:8
Issue date:April 15, 2019
Publication year:2019
Pages:2032-2035
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:An optical cryptosystem via Fourier ptychography with double random phase masks is proposed. The encryption process cannot be precisely simulated except by optical experiment due to vignetting, which is space variant and can act as a one-way function from the perspective of pure optics and improve the security of our system. In addition, the encryption for a high-resolution, large field-of-view, and complex-valued image is achievable. Optical experiments are presented to prove the validity and security of the proposed system. Our method will give more insight into separating optical cryptography from computer cryptography in nature.
? 2019 Optical Society of America
Number of references:38
Main heading:Cryptography
Controlled terms:Optics - Optoelectronic devices
Uncontrolled terms:Complex-valued - High resolution - Large field of views - Linear spaces - One-way functions - Optical experiments - Random phase masks - Space variants
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1364/OL.44.002032
Funding details: Number: 61377008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61377008, 81427802).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106617663
Title:Silicon drift detector applied to X-ray pulsar navigation
Authors:Xu, Neng (1, 2, 3); Sheng, Lizhi (1); Su, Tong (1, 3); Chen, Chen (1, 3); Li, Yao (1, 3); Zhao, Baosheng (1); Liu, Chunliang (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) The School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Sheng, Lizhi(lizhi_sheng@opt.ac.cn)
Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Abbreviated source title:Nucl Instrum Methods Phys Res Sect A
Volume:927
Issue date:21 May 2019
Publication year:2019
Pages:429-434
Language:English
ISSN:01689002
CODEN:NIMAER
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:In this paper, a focused detection system for X-ray pulsar-based Navigation (XNAV) is designed based on Silicon Drift Detector (SDD). The detector electronics mainly adopts the digital trapezoidal shaping method to measure the Times-Of-Arrival (TOAs) and energy of photons. The time measurement accuracy is better than 500ns. The energy resolution is 191eV at 8.05keV, and the maximum count rate is 500kcps between 1 and 12keV. In the semi-physical simulation experiment, the filtering of noise photons by energy discrimination significantly improves the correlation degree between the cumulative pulse profile and the standard profile.
? 2019
Number of references:18
Main heading:X ray detectors
Controlled terms:Electromagnetic wave emission - Navigation - Photons - Pulsars - Silicon - Time of arrival - X rays
Uncontrolled terms:Energy discriminations - Energy resolutions - Measurement accuracy - Semi-physical simulations - Silicon Drift Detector - Times of arrivals - Trapezoidal shaping - X-ray pulsars
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 657.2 Extraterrestrial Physics and Stellar Phenomena - 711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
Numerical data indexing:Electron_Volt 1.00e+03eV to 1.20e+04eV, Electron_Volt 1.91e+02eV, Electron_Volt 8.05e+03eV, Time 5.00e-07s
DOI:10.1016/j.nima.2019.03.007
Funding details: Number: 61471357, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This study was supported by the National Natural Science Foundation of China (NO. 61471357 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006603240
Title:Ultrafast time-response characteristics of AlGaAs materials
Authors:Yin, Fei (1, 2); Yang, Qing (1); Wang, Tao (2); Gao, Guilong (2); He, Kai (2); Yan, Xin (2); Li, Shaohui (2)
Author affiliation:(1) School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi; 710049, China; (2) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi’an, Shaanxi; 710119, China
Corresponding author:Yin, Fei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10843
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Issue date:2019
Publication year:2019
Article number:108430W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623286
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:145452
Sponsor:Institute of Optics and Electronics (IOE), Chinese Academy of Sciences; The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The ultrafast all-optical solid-state framing camera(UASFC) based on semiconductor photorefractive effect is a new type of X-ray ultrafast imaging system. The temporal resolution of UASFC is determined by the response time of the semiconductor. We improve the pump-probe experiment to measure the time response of GaAs/AlGaAs. In our recent experiments, the full width of half maximum (FWHM) is about 2ps, and the dynamic test result of the UASFC system, which use these AlGaAs samples, is 2.5ps. The results verify feasibility of the measurement and provide necessary methods for the further construction of high performance UASFC system.
? 2019 SPIE ·
Number of references:14
Main heading:Gallium alloys
Controlled terms:Aluminum alloys - Aluminum gallium arsenide - Gallium arsenide - III-V semiconductors - Manufacture - Optoelectronic devices - Photoreactivity - Semiconductor alloys
Uncontrolled terms:AlGaAs - Full width of half maximum - MCNP - Photorefractive effects - Pump-probe experiments - Response characteristic - Time response - Transient grating
Classification code:537.1 Heat Treatment Processes - 541.2 Aluminum Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1.2 Compound Semiconducting Materials - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally
Numerical data indexing:Time 2.00e-12s, Time 2.50e-12s
DOI:10.1117/12.2506353

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706488945
Title:Optimized design of high-flux 2D magneto-optical trapping
Authors:Song, Wei (1, 2); Jia, Sen (1); Wang, Xianhua (1); Wu, Cuigang (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
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10839
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Issue date:2019
Publication year:2019
Article number:1083914
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623200
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144715
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:High-precision cold atomic interferometry requires a large flux of cold atomic groups, the length of 2D-MOT largely influences the number of cold atomic clusters in the 3D-MOT flux.The longer the 2D-MOT length, the longer the interaction of the atoms with the light field, so that the trajectory of the atom impinges on the inlet of the differential pump tube so that its divergence is small enough to reach the tube, but the length of 2D-MOT is not the longer,the better.There are two reasons for this: first, higher atomic flux and faster atoms are trapped as the length of 2D-MOT increases, resulting in an increase in the number of collisions between lateral radicals.Second, the average speed in the atomic beam increases.Above an optimum MOT length every increase in length will only add faster atoms to the beam, thus increasing the value for the mean velocity.In summary, choosing the best 2D-MOT length plays a key role in getting the number of cold radicals entering 3D-MOT.In this paper, through mathematical modeling and finite element analysis,2D-MOT race-track anti-Helmholtz coils are numerically calculated.Analyzing the distribution of zero magnetic field for coils of different lengths and zero drift and magnetic field gradient changes caused by the error of asymmetrical coil position, the number of uniform turns and parallelism in the process of processing and assembly.The result provides reliable theoretical guidance for the design and manufacture of the magnetic field system of 2D-MOT high-precision cold-atom interferometers.
? 2019 SPIE.
Number of references:8
Main heading:Atoms
Controlled terms:3D modeling - Atomic beams - Finite element method - Interferometers - Interferometry - Magnetic fields - Optical testing - Processing
Uncontrolled terms:2D-MOT length - Atomic groups - Atomic interferometry - Design and manufactures - Helmholtz coil - Magnetic field gradient - Magnetic field system - Magneto-optical trapping
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 741.3 Optical Devices and Systems - 913.4 Manufacturing - 921.6 Numerical Methods - 931.3 Atomic and Molecular Physics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.1117/12.2506119

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192306999652
Title:High power semiconductor laser lifetime prediction and failure analysis based on Weibull and Log-normal distribution
Title of translation:基于韦布尔分布和对数正态分布的高功率半导体激光器寿命估计和失效分析研究
Authors:Nie, Zhiqiang (1); Wang, Mingpei (1, 2); Sun, Yubo (1, 2); Li, Xiaoning (3); Wu, Di (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) Focuslight Technologies Inc., Xi'an; 710077, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:48
Issue date:April 25, 2019
Publication year:2019
Article number:S105003
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:The accelerated aging test of 60 W (CW mode) 808 nm indiumpackaged conductively cooled single bar high power semiconductor laser with constant current under three different temperatures was analyzed by Weibull and Lognormal distributions models, respectively. The characteristic lifetime and statistical average lifetime of the device under all the tempertures including room temperature were calculated in Weibull distribution analysis, and it is found that for early failure test, the shape parameter is less than 1, and the calculation error of mathematical average lifetime is larger, which is not as good as statistical average lifetime. In Lognormal distribution analysis, the medium lifetime and statistical average lifetime under all the tempertures are calculated. It is found that for early failure test, the logarithmic standard deviation is larger and creates larger error of statistical average lifetime. It means that Lognormal distribution mode is not suitable for lifetime estimation of early failure device. Finally failure analysis of accelerated lifetime devices is carried out.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:14
Main heading:Failure (mechanical)
Controlled terms:Codes (symbols) - Failure analysis - High power lasers - Normal distribution - Outages - Semiconductor lasers - Weibull distribution
Uncontrolled terms:Accelerated ageing tests - Accelerated aging test - Conductively cooled - Distribution analysis - High power semiconductor laser - Lifetime estimation - Log-normal distribution - Statistical average
Classification code:706.1 Electric Power Systems - 723.2 Data Processing and Image Processing - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers - 922.1 Probability Theory - 922.2 Mathematical Statistics
Numerical data indexing:Size 8.08e-07m
DOI:10.3788/IRLA201948.S105003

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20185206295714
Title:The enhanced X-ray Timing and Polarimetry mission—eXTP
Authors:Zhang, ShuangNan (1); Santangelo, Andrea (1, 2); Feroci, Marco (3, 4); Xu, YuPeng (1); Lu, FangJun (1); Chen, Yong (1); Feng, Hua (5); Zhang, Shu (1); Brandt, S?ren (36); Hernanz, Margarita (12, 13); Baldini, Luca (33); Bozzo, Enrico (6); Campana, Riccardo (23); De Rosa, Alessandra (3); Dong, YongWei (1); Evangelista, Yuri (3, 4); Karas, Vladimir (8); Meidinger, Norbert (16); Meuris, Aline (10); Nandra, Kirpal (16); Pan, Teng (21); Pareschi, Giovanni (31); Orleanski, Piotr (37); Huang, QiuShi (22); Schanne, Stephane (10); Sironi, Giorgia (31); Spiga, Daniele (31); Svoboda, Jiri (8); Tagliaferri, Gianpiero (31); Tenzer, Christoph (2); Vacchi, Andrea (25, 26); Zane, Silvia (14); Walton, Dave (14); Wang, ZhanShan (22); Winter, Berend (14); Wu, Xin (7); in’ t Zand, Jean J. M. (11); Ahangarianabhari, Mahdi (29); Ambrosi, Giovanni (32); Ambrosino, Filippo (3); Barbera, Marco (35); Basso, Stefano (31); Bayer, J?rg (2); Bellazzini, Ronaldo (33); Bellutti, Pierluigi (28); Bertucci, Bruna (32); Bertuccio, Giuseppe (29); Borghi, Giacomo (28); Cao, XueLei (1); Cadoux, Franck (7); Campana, Riccardo (23); Ceraudo, Francesco (3); Chen, TianXiang (1); Chen, YuPeng (1); Chevenez, Jerome (36); Civitani, Marta (31); Cui, Wei (25); Cui, WeiWei (1); Dauser, Thomas (39); Del Monte, Ettore (3, 4); Di Cosimo, Sergio (1); Diebold, Sebastian (2); Doroshenko, Victor (2); Dovciak, Michal (8); Du, YuanYuan (1); Ducci, Lorenzo (2); Fan, QingMei (21); Favre, Yannick (7); Fuschino, Fabio (23); Gálvez, José Luis (12, 13); Gao, Min (1); Ge, MingYu (1); Gevin, Olivier (10); Grassi, Marco (30); Gu, QuanYing (21); Gu, YuDong (1); Han, DaWei (1); Hong, Bin (21); Hu, Wei (1); Ji, Long (2); Jia, ShuMei (1); Jiang, WeiChun (1); Kennedy, Thomas (14); Kreykenbohm, Ingo (39); Kuvvetli, Irfan (36); Labanti, Claudio (23); Latronico, Luca (34); Li, Gang (1); Li, MaoShun (1); Li, Xian (1); Li, Wei (1); Li, ZhengWei (1); Limousin, Olivier (10); Liu, HongWei (1); Liu, XiaoJing (1); Lu, Bo (1); Luo, Tao (1); Macera, Daniele (29); Malcovati, Piero (30); Martindale, Adrian (15); Michalska, Malgorzata (37); Meng, Bin (1); Minuti, Massimo (33); Morbidini, Alfredo (3); Muleri, Fabio (3, 4); Paltani, Stephane (6); Perinati, Emanuele (2); Picciotto, Antonino (28); Piemonte, Claudio (28); Qu, JinLu (1); Rachevski, Alexandre (24); Rashevskaya, Irina (27); Rodriguez, Jerome (10); Schanz, Thomas (2); Shen, ZhengXiang (22); Sheng, LiZhi (20); Song, JiangBo (21); Song, LiMing (1); Sgro, Carmelo (33); Sun, Liang (1); Tan, Ying (1); Uttley, Phil (9); Wang, Bo (17); Wang, DianLong (19); Wang, GuoFeng (1); Wang, Juan (1); Wang, LangPing (18); Wang, YuSa (1); Watts, Anna L. (9); Wen, XiangYang (1); Wilms, J?rn (39); Xiong, ShaoLin (1); Yang, JiaWei (1); Yang, Sheng (1); Yang, YanJi (1); Yu, Nian (1); Zhang, WenDa (8); Zampa, Gianluigi (24); Zampa, Nicola (24); Zdziarski, Andrzej A. (38); Zhang, AiMei (1); Zhang, ChengMo (1); Zhang, Fan (1); Zhang, Long (21); Zhang, Tong (1); Zhang, Yi (1); Zhang, XiaoLi (21); Zhang, ZiLiang (1); Zhao, BaoSheng (20); Zheng, ShiJie (1); Zhou, YuPeng (21); Zorzi, Nicola (28); Zwart, J. Frans (11)
Author affiliation:(1) Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (2) Institut für Astronomie und Astrophysik, Eberhard Karls Universit?t, Tübingen; 72076, Germany; (3) INAF–Istituto di Astrofisica e Planetologia Spaziali, Via Fosso del Cavaliere 100, Roma; I-00133, Italy; (4) INFN–Roma Tor Vergata, Via della Ricerca Scientifica 1, Roma; I-00133, Italy; (5) Department of Engineering Physics and Center for Astrophysics, Tsinghua University, Beijing; 100084, China; (6) Department of Astronomy, University of Geneva, chemin d’Ecogia 16, Versoix; 1290, Switzerland; (7) Department of Nuclear and Particle Physics, University of Geneva, Geneva; CH; 1211, Switzerland; (8) Astronomical Institute, Czech Academy of Sciences, Prague; 14100, Czech Republic; (9) Anton Pannekoek Institute for Astronomy, University of Amsterdam, Amsterdam; XH; 1098, Netherlands; (10) CEA Paris-Saclay/IRFU, F-91191, Gif sur Yvette, France; (11) SRON Netherlands Institute for Space Research, Sorbonnelaan 2, Utrecht; CA; 3584, Netherlands; (12) Institute of Space Sciences (ICE, CSIC), 08193 Cerdanyola del Vallès, Barcelona, Spain; (13) Institut d’Estudis Espacials de Catalunya (IEEC), Barcelona; 08034, Spain; (14) Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey; RH56NT, United Kingdom; (15) Department of Physics and Astronomy, University of Leicester, Leicester; LE17RH, United Kingdom; (16) Max Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, Garching; 85748, Germany; (17) Center for Precision Engineering, Harbin Institute of Technology, Harbin; 150001, China; (18) State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin; 150006, China; (19) School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin; 150001, China; (20) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (21) Beijing Institute of Spacecraft System Engineering, CAST, Beijing; 100094, China; (22) Key Laboratory of Advanced Material Microstructure of Education Ministry of China, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai; 200090, China; (23) Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna, Istituto Nazionale di Astofisica, Bologna; 40129, Italy; (24) Sezione di Trieste, Istituto Nazionale di Fisica Nucleare, Trieste TS; 34149, Italy; (25) Department of Physics and Center for Astrophysics, Tsinghua University, Beijing; 100084, China; (26) Universita’ degli Studi di Udine, Via delle Scienze 206, Udine; 33100, Italy; (27) TIFPA, Istituto Nazionale di Fisica Nucleare, Via Sommarive 14, Povo TN; 38123, Italy; (28) Fondazione Bruno Kessler, Via Sommarive 18, Povo TN; 38123, Italy; (29) Politecnico di Milano, Via Anzani 42, Como, Italy; (30) Department of Electronics, Information and Biomedical Engineering and INFN Pavia, University of Pavia, Via Ferrata 3, Pavia; I-27100, Italy; (31) Osservatorio Astronomico di Brera, Istituto Nazionale di Astofisica, Via Brera, 28, Milano; 20121, Italy; (32) Sezione di Perugia, Istituto Nazionale di Fisica Nucleare, Via Alessandro Pascoli, 23c, Perugia; 06123, Italy; (33) Sezione di Pisa, Istituto Nazionale di Fisica Nucleare, Largo Bruno Pontecorvo, 3, Pisa; 56127, Italy; (34) Sezione di Torino, Istituto Nazionale di Fisica Nucleare, Via Pietro Giuria, 1, Torino; 10125, Italy; (35) Dipartimento di Fisica e Chimica, Via Archirafi 36, Palermo; 90123, Italy; (36) DTU, Building 327, DK-2800 Kongens, Lyngby, Denmark; (37) Space Research Center, Polish Academy of Sciences, Bartycka 18a, Warszawa; PL-00-716, Poland; (38) Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, Warszawa; PL-00-716, Poland; (39) Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Universit?t Erlangen-Nürnberg, Sternwartstr. 7, Bamberg; D-96049, Germany
Corresponding author:Zhang, ShuangNan(zhangsn@ihep.ac.cn)
Source title:Science China: Physics, Mechanics and Astronomy
Abbreviated source title:SCI. CHINA Phys. Mech. Astron.
Volume:62
Issue:2
Issue date:February 1, 2019
Publication year:2019
Article number:29502
Language:English
ISSN:16747348
E-ISSN:18691927
Document type:Journal article (JA)
Publisher:Science in China Press
Abstract:In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources. The paper provides a detailed description of: (1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload; (2) the elements and functions of the mission, from the spacecraft to the ground segment.
? 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:55
Main heading:X rays
Controlled terms:Astrophysics - Ellipsometry - Equations of state - Gravitation - Gravity waves - Polarimeters - Space flight - Timing circuits
Uncontrolled terms:Extragalactic objects - Fundamental physics - Scientific payloads - Space missions - Space science missions - Wide-field monitoring - X-ray instrumentation - X-ray polarimetry
Classification code:656.1 Space Flight - 657.2 Extraterrestrial Physics and Stellar Phenomena - 713.4 Pulse Circuits - 931.5 Gravitation, Relativity and String Theory - 932.1 High Energy Physics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements
DOI:10.1007/s11433-018-9309-2
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: DLR, Sponsor: Deutsches Zentrum für Luft- und Raumfahrt;Number: 2017-14-H.O., Acronym: -, Sponsor: -;Number: -, Acronym: DLR, Sponsor: Division of Loan Repayment;Number: -, Acronym: INAF, Sponsor: Istituto Nazionale di Astrofisica;Number: -, Acronym: INFN, Sponsor: Instituto Nazionale di Fisica Nucleare;Number: -, Acronym: ASI, Sponsor: Agenzia Spaziale Italiana;Number: XDA15020100, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2013/10/M/ST9/00729, Acronym: HSCF, Sponsor: Health Sciences Centre Foundation;Number: ESP2017-82674-R, Acronym: -, Sponsor: Ministerio de Economía y Competitividad;Number: -, Acronym: FEDER, Sponsor: Federación Espa?ola de Enfermedades Raras;
Funding text:The eXTP mission is an enhanced version of the Chinese X-ray Timing and Polarimetry mission [6], which in 2011 was selected and funded for a Phase 0/A study as one of the background concept missions in the Strategic Priority Space Science Program of the Chinese Academy of Sciences (CAS). Also in 2011, the Large Observatory for Timing (LOFT) mission concept [7, 8] was selected for an assessment study in the context of the ESA’s Announcement of Opportunity for the third of the medium size missions (M3) foreseen in the framework of the Agency’s Cosmic Vision programme. The LOFT study was carried out in 2011-2014 by a consortium of European institutes. Eventually the exo-planetary mission PLATO, considered more well-timed, was selected as ESA’s Cosmic Vision M3 mission. Following this, in 2015, the European LOFT consortium and the Chinese team merged the LOFT and XTP mission concepts, thus starting the eXTP project.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906900440
Title:Tensor representation based target detection for hyperspectral imagery
Title of translation:基于张量表示的高光谱图像目标检测
Authors:Zhang, Xiao-Rong (1, 2, 3); Hu, Bing-Liang (1); Pan, Zhi-Bin (2); Zheng, Xi (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Electronic & Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710016, China
Corresponding author:Zhang, Xiao-Rong(zhangxiaorong@opt.ac.cn)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:27
Issue:2
Issue date:February 1, 2019
Publication year:2019
Pages:488-498
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:Target detection for Hyperspectral Images (HSIs) is gaining importance owing to its important military and civilian applications. This study proposed a novel target detection algorithm for HSIs based on tensor representation. The algorithm employed tensor analysis including CP and tensor block decompositions to implement blind source separation on hyperspectral data. First, effective spatial and spectral features of the blocks of local images were extracted. Then, a detection model based on sparse and collaborative representations was established. Experiments were conducted to evaluate the performance of our approach under multiple scenes with complex backgrounds. From the visual representation of the results, it can be concluded that the proposed approach effectively extracts the spatial-spectral features from scenes with strong noise and complex backgrounds. The approach has good ability to suppress the background and the target is salient. In addition, the performance of the approach is evaluated using quantitative metrics such as Receiver Operating Curve (ROC) and area under the ROC curve (AUC). Considering the popular HSI image of San Diego as an example, the approach achieves 90% detection rate with a false alarm rate of 10%, and the AUC is greater than 0.95. Hence, our approach outperforms other popular approaches.
? 2019, Science Press. All right reserved.
Number of references:30
Main heading:Radar target recognition
Controlled terms:Blind source separation - Feature extraction - Military applications - Military photography - Remote sensing - Spectroscopy - Target tracking - Tensors
Uncontrolled terms:Area under the ROC curve - Collaborative representations - Hyper-spectral imageries - Quantitative metrics - Receiver operating curves - Target detection algorithm - Tensor representation - Visual representations
Classification code:404.1 Military Engineering - 716.2 Radar Systems and Equipment - 921.1 Algebra
Numerical data indexing:Percentage 1.00e+01%, Percentage 9.00e+01%
DOI:10.3788/OPE.20192702.0488

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006916926
Title:Random scattering of images and visibility enhancement via stochastic resonance
Authors:Zhang, Yongbin (1, 2); Liu, Hongjun (1, 3); Huang, Nan (1); Wang, Zhaolu (1)
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, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Shanxi University, Collaborative Innovation Center of Extreme Optics, Taiyuan, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:58
Issue:4
Issue date:April 1, 2019
Publication year:2019
Article number:046105
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:We investigate numerically the random scattering of two-dimensional (2-D) images and the visibility enhancement via stochastic resonance both in intensity and momentum spaces. The multiple scattering destroys the direct transmission of photons, but some ballistic photons carrying the image information still penetrate the scattering media. The underlying ballistic image signals exhibit an instability and are enhanced at the expense of scattering noise under self-focusing nonlinearity, which is described as a stochastic resonance. It is found that the higher ratio of ballistic signals to scattering noise triggers a stronger instability. The effect of visibility enhancement in different scattering conditions is discussed, and the 2-D quasiparticle motion model is designed to analyze the nonlinear dynamic evolution. Our results provide potential guidance for noisy image detection.
? 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:28
Main heading:Image enhancement
Controlled terms:Ballistics - Circuit resonance - Magnetic resonance - Photons - Plasma stability - Stochastic systems - Visibility
Uncontrolled terms:Image information - Random scattering - Scattering conditions - Scattering media - Scattering noise - Self-focusing - Stochastic resonances - Two-dimensional (2D) images
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 703.1 Electric Networks - 741.2 Vision - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics - 961 Systems Science
DOI:10.1117/1.OE.58.4.046105

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106641005
Title:Advanced Adaptive Photonic RF Filters with 80 Taps Based on an Integrated Optical Micro-Comb Source
Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai Tak (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Hong Kong, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (5) INSR-Energie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada; (6) ITMO University, St. Petersburg; 1971010, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:37
Issue:4
Issue date:February 15, 2019
Publication year:2019
Pages:1288-1295
Article number:8606970
Language:English
ISSN:07338724
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We demonstrate a photonic radio frequency (RF) transversal filter based on an integrated optical micro-comb source featuring a record low free spectral range of 49 GHz, yielding 80 micro-comb lines across the C-band. This record high number of taps, or wavelengths for the transversal filter results in significantly increased performance including a QRF factor more than four times higher than previous results. Furthermore, by employing both positive and negative taps, an improved out-of-band rejection of up to 48.9 dB is demonstrated using a Gaussian apodization, together with a tunable center frequency covering the RF spectra range, with a widely tunable 3-dB bandwidth and versatile dynamically adjustable filter shapes. Our experimental results match well with theory, showing that our transversal filter is a competitive solution to implement advanced adaptive RF filters with broad operational bandwidth, high frequency selectivity, high reconfigurability, and potentially reduced cost and footprint. This approach is promising for applications in modern radar and communications systems.
? 1983-2012 IEEE.
Number of references:52
Main heading:Comb filters
Controlled terms:Adaptive filtering - Bandwidth - Microwave resonators - Transversal filters - Trellis codes - Wave filters
Uncontrolled terms:Communications systems - Free spectral range - Gaussian apodization - High-frequency selectivity - Microring resonator - Microwave Photonics - Operational bandwidth - Out of band rejection
Classification code:703.2 Electric Filters - 714 Electronic Components and Tubes - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
Numerical data indexing:Decibel 3.00e+00dB, Decibel 4.89e+01dB, Frequency 4.90e+10Hz
DOI:10.1109/JLT.2019.2892158

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193707433996
Title:Research on the fast image motion compensation technology of aerial digital camera
Authors:Chen, Weining (1); Lei, Yangjie (1); Yang, Hong Tao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Multi Chinese Academy of Science, NO.17 Xinxi Road, XI'an, Shaanxi, China
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:ICCCV 2019 - Proceedings of the 2nd International Conference on Control and Computer Vision
Issue date:June 15, 2019
Publication year:2019
Pages:71-74
Language:English
ISBN-13:9781450363228
Document type:Conference article (CA)
Conference name:2nd International Conference on Control and Computer Vision, ICCCV 2019
Conference date:June 15, 2019 - June 18, 2019
Conference location:Jeju Island, Korea, Republic of
Conference code:150541
Sponsor:Wuhan University
Publisher:Association for Computing Machinery
Abstract:When the aerial camera is photographed, during the forward flight,there is a relative motion between the image formed by thephotographic object on the focal plane and the photosensitivemedium, which brings about image blur and seriously affects theimaging quality of the camera. This paper analyzes the cause ofheading image shift and its influence on image, and expounds thenecessity of image shift compensation. On the basis of theanalysis and study of various existing methods of image shiftcompensation, a heading image shift compensation mechanismwas designed, and the image shift compensation was carried outusing a moving target structure. The imaging effect was goodthrough flight tests. Can satisfy the multitype aerial imagingimage migration compensation requirements.
? 2019 Association for Computing Machinery.
Number of references:9
Main heading:Antennas
Controlled terms:Computer vision - Motion compensation
Uncontrolled terms:Aerial camera - Forward flight - Image motion - Image motion compensation - Imaging effects - Migration compensations - Moving targets - Relative motion
Classification code:723.5 Computer Applications
DOI:10.1145/3341016.3341641

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407351742
Title:Easy method to measure the packaging-induced stress of a semiconductor laser diode by lasing wavelength shifting
Authors:Zhang, Hongyou (1, 2, 3); Fu, Tuanwei (3); Zah, Chung-En (3); Liu, Xingsheng (1, 2, 3, 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; 710077, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Focuslight Technologies Inc., Xi’an, Shanxi; 710077, China; (4) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhang, Hongyou(zhanghy01@focuslight.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:24
Issue date:August 20, 2019
Publication year:2019
Pages:6672-6677
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In this paper, the packaging-induced stresses are theoretically calculated by modeling multilayered structures for different packaging structures. We report a method to measure the packaging-induced stress of a laser diode array (LDA) by comparing the emission wavelength of the single emitter located in the middle of a laser bar before and after packaging. The wavelength is tested under a low duty cycle (50 μs/10 Hz, DC 0.05%) to eliminate the thermal effect to wavelength shifting. Experimental calculation results for the packaging-induced stress of LDAs are in good agreement with the theoretical calculations and simulation results. For a GaAs laser bar, we find the packaging stresses are compression stresses, which make the emission wavelength blue-shift in terms of 1.09 × 10?2 nm∕MPa. We propose a mapping of packaging-induced stress distribution in laser bars on a microscopic scale by considering the emission spectra of each emitter in a laser bar. Compared to single-emitter resolved photo-current or micro-photoluminescence measurements, as proposed by other authors, we offer a much easier tool to test and map the distribution of packaging-induced stress in laser bars.
? 2019 Optical Society of America.
Number of references:19
Main heading:Packaging
Controlled terms:Blue shift - Emission spectroscopy - Gallium arsenide - III-V semiconductors - Laser Doppler velocimeters - Semiconductor diodes - Semiconductor lasers
Uncontrolled terms:Calculation results - Emission wavelength - Micro photoluminescence - Multi-layered structure - Packaging induced stress - Packaging structure - Theoretical calculations - Wavelength shifting
Classification code:694.1 Packaging, General - 714.2 Semiconductor Devices and Integrated Circuits - 744.4.1 Semiconductor Lasers - 744.9 Laser Applications - 804 Chemical Products Generally
Numerical data indexing:Percentage 5.00e-02%
DOI:10.1364/AO.58.006672
Funding details: Number: 61404172, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (61334010, 61404172).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006599969
Title:Scratch hardness of rare-earth substituted calcium aluminosilicate glasses????(Open Access)
Authors:She, Jiangbo (1, 2); Sawamura, Shigeki (1, 3); Wondraczek, Lothar (1)
Author affiliation:(1) Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Fraunhoferstra?e 6, Jena; D-07743, Germany; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an; 710119, China; (3) AGC Inc., 1150 Hazawa-cho, Kanagawa-ku, Yokohama-shi; Kanagawa; 221-8755, Japan
Corresponding author:Wondraczek, Lothar(lothar.wondraczek@uni-jena.de)
Source title:Journal of Non-Crystalline Solids: X
Abbreviated source title:J Non Cryst Solids X
Volume:1
Issue date:March 2019
Publication year:2019
Article number:100010
Language:English
ISSN:25901591
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:We report lateral deformation experiments on rare earth substituted glasses from percalcic CaO-Al2O3-SiO2-Tm2O3. Using instrumented Berkovich indentation with normal loads below 100 mN, the scratch hardness was obtained from the work of lateral deformation per deformed volume in the elastic-plastic regime. The positive effect of rare-earth substitution on normal hardness, Poisson's ratio and Young's modulus was found to extent also to scratch hardness: in 25CaO-15Al2O3-60SiO2, partial replacement of alumina by Tm2O3 leads to an enhancement of the scratch hardness by about 1 GPa per 2 mol% of substitution, reaching the highest values of scratch hardness which have been reported for oxide glasses thus far. The enhancement of scratch hardness is attributed to enhanced cation packing fraction and super-structural cohesion as a result of rare earth substitution. The previously reported linear correlation between scratch hardness and bulk modulus is confirmed.
? 2019 The Authors
Number of references:35
Main heading:Hardness
Controlled terms:Alumina - Aluminosilicates - Aluminum oxide - Calcium - Deformation - Elastic moduli - Elastoplasticity - Glass - Rare earths - Silica - Thulium compounds
Uncontrolled terms:Berkovich indentation - Calcium aluminosilicate glass - Calcium aluminosilicates - Lateral deformation - Linear correlation - Partial replacement - Rare-earth substitution - Scratch
Classification code:549.2 Alkaline Earth Metals - 804.2 Inorganic Compounds - 812.3 Glass - 951 Materials Science
Numerical data indexing:Force 1.00e-01N, Pressure 1.00e+09Pa
DOI:10.1016/j.nocx.2019.100010
Funding details: Number: -, Acronym: ERC, Sponsor: European Research Council;Number: -, Acronym: -, Sponsor: Horizon 2020;
Funding text:This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC grant UTOPES, grant agreement no. 681652).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007222157
Title:Nonlinear reconstruction of weak optical diffused images under turbid water
Authors:Wang, Zhaolu (1); Liu, Hongjun (1, 2); Huang, Nan (1); Zhang, Yongbin (1); Chi, Jiao (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Xi’an; 710119, China; (2) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:14
Issue date:2019
Publication year:2019
Pages:3502-3505
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Forward scattering noise may degrade the imaging resolution and diffuse the image in turbid water. The reconstruction of diffused images hidden by forward scattering noise is crucial for underwater imaging. To overcome the limitation of forward scattering for optical imaging in turbid water, a nonlinear image reconstruction technology is proposed in the experiment. We experimentally demonstrated the reconstruction of the diffused images under turbid water via signal seeded incoherent modulation instability (MI) in a nonlinear photorefractive crystal. The reconstructed image with high quality and the minimum resolution of 28.51 lp/mm are observed in the experiment. This is the first time, to the best of our knowledge, that a spatial MI effect is used to process underwater weak optical diffused images in the experiment.
? 2019 Optical Society of America.
Number of references:33
Main heading:Image reconstruction
Controlled terms:Forward scattering - Nonlinear optics - Photorefractive crystals - Underwater imaging
Uncontrolled terms:High quality - Imaging resolutions - Incoherent modulation - Non linear reconstruction - Nonlinear photorefractive crystals - Optical imaging - Reconstructed image - Turbid water
Classification code:711 Electromagnetic Waves - 741.1.1 Nonlinear Optics - 746 Imaging Techniques
DOI:10.1364/OL.44.003502
Funding details: Number: XAB2015B27, Acronym: -, Sponsor: -;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61505247, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QNLM2016ORP0111, Acronym: QNLM, Sponsor: Qingdao National Laboratory for Marine Science and Technology;
Funding text:Funding. Qingdao National Laboratory for Marine Science and Technology (QNLM) (QNLM2016ORP0111); National Natural Science Foundation of China (NSFC) (61775234, 11604377, 61505247); The CAS "Light of West China" Program (XAB2015B27).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191706840904
Title:Low-Light Remote Sensing Images Enhancement Algorithm Based on Fully Convolutional Neural Network
Authors:Jian, Wuzhen (1, 2); Zhao, Hui (1); Bai, Zhe (1); Fan, Xuewu (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi’an, Shaanxi; 710119, China; (2) Shaanxi Normal University, Xi’an, Shaanxi; 710100, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Lecture Notes in Electrical Engineering
Abbreviated source title:Lect. Notes Electr. Eng.
Volume:552
Part number:1 of 1
Issue title:Proceedings of the 5th China High Resolution Earth Observation Conference, CHREOC 2018
Issue date:2019
Publication year:2019
Pages:56-65
Language:English
ISSN:18761100
E-ISSN:18761119
ISBN-13:9789811365522
Document type:Conference article (CA)
Conference name:5th China High-resolution Earth Observation Conference, CHREOC 2018
Conference date:October 3, 2018 - October 6, 2018
Conference location:Xi'an, China
Conference code:224759
Publisher:Springer Verlag
Abstract:Low-light remote sensing is a powerful complement to daytime optical remote sensing and can greatly expand the time domain of high-resolution earth observations, and make day and night imaging possible. However, when a low-light sensor is used in the morning dusk and dawn, the captured images have characteristics of low contrast, low brightness, and low signal-to-noise ratio, which severely restrict the identification and interpretation of ground objects. Traditional low-light image enhancement algorithms such as histogram equalization, gamma conversion, and contrast-limited adaptive histogram equalization algorithm, and so on can enhance the low-light remote sensing image and solve the problem of contrast enhancement, but the noise amplification effect brought by the enhancement will degrade the signal-to-noise ratio of the enhanced image. Therefore, in this paper, a data-driven low-light remote sensing image enhancement algorithm is studied. First of all, lots of low-light raw image data pairs corresponding to very low illumination are captured. Then, these raw image data are used to train a deep fully convolutional neural network composed of an encoder–decoder structure. After that, the low-light remote sensing images could be enhanced by the pretrained net structure. The numerical results demonstrate that the fully convolutional neural network based on enhancement algorithm greatly improves the brightness and the contrast of low-light images compared with the traditional enhancement algorithms while a high enough signal-to-noise ratio could be preserved, which will make interpretation and identification much easier.
? 2019, Springer Nature Singapore Pte Ltd.
Number of references:27
Main heading:Image enhancement
Controlled terms:Convolution - Equalizers - Graphic methods - Helium - Luminance - Median filters - Neural networks - Observatories - Remote sensing - Signal to noise ratio
Uncontrolled terms:CLAHE - Convolutional neural network - Gamma correction - Median filtering - Remote sensing images
Classification code:713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 716.1 Information Theory and Signal Processing - 804 Chemical Products Generally
DOI:10.1007/978-981-13-6553-9_7

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006602278
Title:Multiband phase-coded signal generation based on a simple photonic bi-phase modulator
Authors:Gao, Yiran (1); Wu, Zhonghan (1); Dai, Jian (1, 2); Xu, Kun (1)
Author affiliation:(1) State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing; 100876, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710068, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11048
Part number:1 of 1
Issue title:17th International Conference on Optical Communications and Networks, ICOCN 2018
Issue date:2019
Publication year:2019
Article number:1104809
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627703
Document type:Conference article (CA)
Conference name:17th International Conference on Optical Communications and Networks, ICOCN 2018
Conference date:November 16, 2018 - November 19, 2018
Conference location:Zhuhai, China
Conference code:145454
Publisher:SPIE
Abstract:A simple photonic approach for the multiband phase-coded microwave generation based on a dual-drive Mach-Zehnder modulator (DDMZM) is proposed. By injecting the 5-bit barker code sequence to the bias of DDMZM, the binary phase-coded microwave signal for multiband radar application is generated. A proof-of-concept experiment is performed. The generation of phase-coded signals tuning from 1 to 9 GHz with 1 to 20 Mbit/s coding rates is verified.
? 2019 SPIE.
Number of references:13
Main heading:Light modulators
Controlled terms:Optical communication - Radar
Uncontrolled terms:Bi-phase modulators - Mach Zehnder modulator - Microwave Photonics - Microwave signals - Multiband - Phase coded signals - Proof of concept - Radar applications
Classification code:716.2 Radar Systems and Equipment - 717.1 Optical Communication Systems
Numerical data indexing:Bit_Rate 1.00e+06bit/s to 2.00e+07bit/s, Frequency 1.00e+09Hz to 9.00e+09Hz
DOI:10.1117/12.2518297
Funding details: Number: -, Acronym: -, Sponsor: State Key Laboratory of Information Photonics and Optical Communications;Number: -, Acronym: -, Sponsor: State Key Laboratory of Information Photonics and Optical Communications;Number: 61501051, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: BUPT, Sponsor: Beijing University of Posts and Telecommunications;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This work was partly supported by the National Natural Science Foundation of China (NSFC) Program (61501051, 61625104 and 61821001); Fundamental Research Funds for the Central Universities; Fund of State Key Laboratory of Information Photonics and Optical Communications (BUPT No. IPOC2017ZT01).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307001867
Title:Detection of ships in inland river using high-resolution optical satellite imagery based on mixture of deformable part models
Authors:Song, Pengfei (1, 2, 3); Qi, Lei (1, 4); Qian, Xueming (2); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, Shaanxi; 710119, China; (2) Xi'an Jiaotong University, Xi'an, 710049, China; (3) CCCC Railway Consultants Group Company Limited, Beijing; 100088, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Journal of Parallel and Distributed Computing
Abbreviated source title:J. Parallel Distrib. Comput.
Volume:132
Issue date:October 2019
Publication year:2019
Pages:1-7
Language:English
ISSN:07437315
CODEN:JPDCER
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:Ship detection using optical satellite imagery is of great significance in many applications such as traffic surveillance, pollution monitoring, etc. So far, a lot of ship detection methods have been developed for images covering open sea, offshore area and harbors. Compared to the ship detection in sea and offshore area, it is more difficult to detect ships in inland river due to several challenges. First of all, many ships in inland river are clustered together and hard to be separated from each other. Secondly, ships lying alongside the pier are very likely to be recognized as part of the pier. Thirdly, ships in inland river is usually smaller than those in the sea. A hierarchical method is proposed to detect the ships in inland river in this paper. The Regions of Interest (ROIs) are firstly extracted based on water–land segmentation using multi-spectral information. Then two kinds of ship candidates are extracted based on the panchromatic band. The isolated ships are detected by analyzing the shape of connected components and the clustered ships are detected by using mixtures multi-scale Deformable Part Models (DPM) and Histogram of Oriented Gradient (HOG). At last, a Back Propagation Neural Network (BPNN) is trained to classify the ship candidates using the multi-spectral bands. The experiments using Quickbird satellite images show that our approach is effective in ship detection and performs particularly well in separating the ships clustered together and staying alongside the pier.
? 2019 Elsevier Inc.
Number of references:13
Main heading:Ships
Controlled terms:Backpropagation - Mixtures - Neural networks - Offshore oil well production - Piers - River pollution - Rivers - Satellite imagery
Uncontrolled terms:Back-propagation neural networks - Deformable part models - Histogram of oriented gradients (HOG) - Inland rivers - Optical satellite imagery - Pollution monitoring - Ship detection - Traffic surveillance
Classification code:407.1 Maritime Structures - 453 Water Pollution - 511.1 Oil Field Production Operations - 655.2 Satellites - 723.4 Artificial Intelligence
DOI:10.1016/j.jpdc.2019.04.013
Funding details: Number: 61472413, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61772510, in part by the Key Research Program of Frontier Sciences, CAS, China under Grant QYZDB-SSW-JSC015, in part by the National Natural Science Foundation of China under Grant 61472413. ☆ This work was supported in part by the National Natural Science Foundation of China under Grant 61772510, in part by the Key Research Program of Frontier Sciences, CAS, China under Grant QYZDB-SSW-JSC015, in part by the National Natural Science Foundation of China under Grant 61472413.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106955334
Title:Pulse signal restoration via stochastic resonance in a fabry-perot cavity with an intracavity nematic liquid crystal film
Authors:Feng, Xingpan (1, 3); Liu, Hongjun (1, 2); Huang, Nan (1); Wang, Zhaolu (1); Zhang, Yongbin (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) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (3) University of Chinese Academy of Sciences, Beijing; 100084, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:10
Issue date:2019
Publication year:2019
Pages:14931-14941
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We theoretically propose a method to restore weak pulse signals submerged in noise via stochastic resonance, which is based on the optical bistability induced by the molecule reorientation in a Fabry-Perot cavity with an intracavity nematic liquid-crystal film. The bistable properties of this cavity are analyzed with different reflectance of the mirrors, initial phase shift and initial angle between the phase propagation vector and the director. The cross-correlation coefficient between pure input pulses and output is calculated to quantitatively evaluate the influence of noise intensity on output. The simulation results show a cross-correlation gain of 3.2 and that the buried signal can be recovered effectively by this device. It proves the potential of using this structure to recover noise-hidden pulse signals in an all-optical system.
? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Number of references:18
Main heading:Signal reconstruction
Controlled terms:Cavity resonators - Circuit resonance - Fabry-Perot interferometers - Fiber optic sensors - Liquid films - Magnetic resonance - Nematic liquid crystals - Optical films - Optical systems - Plastic films - Restoration - Stochastic systems
Uncontrolled terms:All-optical systems - Cross correlations - Cross-correlation coefficient - Fabry-Perot cavity - Nematic liquid crystal films - Noise intensities - Phase propagation - Stochastic resonances
Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 703.1 Electric Networks - 716.1 Information Theory and Signal Processing - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 817.1 Polymer Products - 941.3 Optical Instruments - 961 Systems Science
DOI:10.1364/OE.27.014931
Funding details: Number: 11604377, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61505247, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775234, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61775234, 11604377, and 61505247); Qingdao National Laboratory for Marine Science and Technology (QNLM2016ORP0111).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534740
Title:A spatial moving target recognition algorithm based on full information vector
Authors:Du, Yun (1, 2, 3); Wen, Desheng (1); Liu, Guizhong (2); Yi, Hongwei (1); Liu, Meiying (1, 3); Fang, Junli (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) School of Computer and Communication, Lanzhou University of Technology, Lanzhou; 730050, China
Corresponding author:Du, Yun
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105210
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:In this paper, a full information vector recognition algorithm for moving targets is proposed on the basis of the characteristic distribution of point targets and the moving characteristic between frames. The traditional multi-frame image fusion method of moving target recognition is abandoned. We utilize the distribution characteristic of point targets extracted from single image and moving characteristic of point targets extracted from multiple images to recognize and classify moving targets with the similarity principle of feature vector. Compared with the traditional maximum likelihood estimation image processing algorithm, the proposed recognition method costs less computation and provides a novel approach for spatial moving target detection and recognition.
? 2019 SPIE.
Number of references:7
Main heading:Image processing
Controlled terms:Image fusion - Maximum likelihood estimation - Optical data processing - Photonics - Vectors
Uncontrolled terms:Distribution characteristics - Full informations - Gauss distribution - Image processing algorithm - Moving target detection - Moving targets - recognition - Recognition algorithm
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 921.1 Algebra - 922 Statistical Methods
DOI:10.1117/12.2521938

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432483
Title:On-orbit pointing adjusting mechanism of full-disc vector magnetograph (FMG)
Authors:Sun, Zhenguo (1, 2); Wang, Wei (1); Shi, Jinfeng (1); Xia, Siyu (1); Li, Xupeng (1, 2); Song, Yang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, No.17, Xinxi Road, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Jingjia Road, Beijing; 100049, China
Corresponding author:Wang, Wei(wangwei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083706
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:This paper mainly introduces the motion analysis and the stress of some components of the full-disc vector magnetograph (FMG). As the connecting part of the FMG and the satellite platform, its main function is to adjust the optical axis of the FMG so that its imaging of the sun remains in the center of the CCD, thus achieving pitch and yaw of the optical axis. The maximum adjusting range is ±12′ and the regulation precision is ±5′′. The kinematic support is used to connect the optical box and the satellite platform. The two Monopods are respectively mounted on the two YZ planes of the optical cabin. The Bipod is mounted on the XZ plane of the optical capsule, which can adjust the pitch and yaw of the optical capsule. The movement of the Bipod is mainly powered by two motors. This paper simulates the force condition of the motor's screw sleeve to calculate the parameters of the motor. This article simulates the upward, downward, leftward and rightward movements of the pitch and yaw motions of the FMG's on-orbit pointing adjustment mechanism. Compared with the results of MATLAB theoretical calculations, the maximum error of the simulation results is 0.7969mm, and the minimum error is 0.0212mm, which basically accords with the ideal sports condition.
? 2019 SPIE.
Number of references:7
Main heading:Orbits
Controlled terms:Degrees of freedom (mechanics) - Hinges - Magnetometers - Manufacture - MATLAB - Mirrors - Optical testing - Telescopes
Uncontrolled terms:Degree of freedom - Flexure hinge - Force analysis - Motion simulations - On orbit
Classification code:537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems - 921 Mathematics - 931.1 Mechanics - 942.3 Magnetic Instruments
Numerical data indexing:Size 2.12e-05m, Size 7.97e-04m
DOI:10.1117/12.2504904

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432481
Title:Mechanical design of zoom optical system for deep space exploration
Authors:Qian, Chongsen (1, 2); Li, Fu (1); Yang, Jianfeng (1); Sun, Yi (1, 2); Yang, Wenqiang (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; 100039, China
Corresponding author:Li, Fu
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083704
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:As one of the largest aerospace countries in the world, China's National Space Administration has officially launched the China Mars Exploration Project in 2016. The zoom lens, in contrast to a fixed focal length lens, has a continuously variable focal length that provides more intuitive information for probing activities. Therefore, it is particularly important to design a zoom lens and use it as a Mars probe imaging payload. In this paper, a zoom system is designed for the climatic environment of Mars and the condition requirements of the lander during transportation work. At the same time, different types of structures were discussed. Finally, a cam rotation mechanism was used in the zoom mechanism. Examining the complexity of the space thermal environment, the thermal characteristics of the system structure will have a great impact on the system performance. To prevent the adverse effects of different thermal expansion coefficients on the system over a wide operating temperature range, select the appropriate materials and the overall structure It is very important to carry out finite element analysis. In this paper, thermal deformation analysis of Aluminum Alloys, Titanium Alloys and Invar Steel materials was performed. The results show that the thermal deformation of Aluminum Alloy materials is maximum at the working temperature of -55°C to +55°C, the thermal deformation of the Aluminum Alloy material is the largest, and the titanium alloy and Invar Steel are relatively small. Finally, the axial displacement is analyzed. The analysis results show that Invar Steel material has the smallest axial displacement. However, considering the weight reduction, it has met the rocket launch requirements. Finally, titanium alloy material is used as the system structural material, and the cam curve is compensated according to the axial displacement.
? 2019 SPIE.
Number of references:9
Main heading:Aluminum alloys
Controlled terms:Cams - Deformation - Finite element method - Interplanetary flight - Manufacture - Martian surface analysis - Mirrors - Optical systems - Optical testing - Rockets - Space research - Telescopes - Thermal expansion - Titanium alloys
Uncontrolled terms:Aluminum alloy materials - Cam mechanism - Operating temperature ranges - Thermal characteristics - Thermal deformation - Thermal deformation analysis - Thermal expansion coefficients - Zoom lens
Classification code:537.1 Heat Treatment Processes - 541.2 Aluminum Alloys - 542.3 Titanium and Alloys - 601.3 Mechanisms - 654.1 Rockets and Missiles - 656.1 Space Flight - 656.2 Space Research - 741.3 Optical Devices and Systems - 921.6 Numerical Methods - 951 Materials Science
DOI:10.1117/12.2504761

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190206368007
Title:Multiband circular dichroism from bilayer rotational F4 nanostructure arrays
Authors:Qi, Jianxia (1, 2); Zhang, Mingdi (3); Zhang, Yunguang (1); Han, Qingyan (4); Gao, Wei (4); Wang, Yongkai (4); Miao, Runcai (2); Dong, Jun (4)
Author affiliation:(1) School of Science, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China; (2) School of Physics and Information Technology, Shaanxi Normal University, Xi’an; 710000, China; (3) School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China; (4) School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:2
Issue date:January 10, 2019
Publication year:2019
Pages:479-484
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A chiral nanostructure array is designed, which is composed of a bilayer rotational F4-shaped nanoarray configuration. The surface plasmon resonance and circular dichroism are studied by changing the parameters of the structure. The results show that the structure has strong multiband circular dichroism, which is attributed to the coupling of the layers. In theory, based on the Born–Kuhn model, the upper and lower nanostructures are equivalent to electric dipoles. By analyzing the coupling mode of electric dipoles in the upper and lower layer, the mechanism of circular dichroism and the shift of the circular dichroism resonance are revealed. Besides, there are several specific modes that are fault tolerant of fabrication issues. This feature unveils the bright prospect of spectral anti-interference. So, the suggested chiral nanostructure can be used in biologically targeted molecular detection and spectral sensing.
? 2019 Optical Society of America.
Number of references:33
Main heading:Dichroism
Controlled terms:Nanostructures - Surface plasmon resonance
Uncontrolled terms:Anti-interference - Chiral nanostructures - Coupling mode - Electric dipole - Fault-tolerant - Molecular detection - Nanostructure arrays - Spectral sensing
Classification code:741.1 Light/Optics - 761 Nanotechnology - 933 Solid State Physics
DOI:10.1364/AO.58.000479
Funding details: Number: 11604262, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 17JF026, Acronym: XUPT, Sponsor: Xi'an University of Posts and Telecommunications;Number: 2017GY-189, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2018J M1052, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:National Natural Science Foundation of China (NSFC) (11604262); Xi’an University of Posts and Telecommunications (XUPT) (17JF026); Natural Science Foundation of Shaanxi Province (2017GY-189, 2018J M1052).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432474
Title:The study of free form optical elements corrected aberrations of optical system
Authors:Pang, Zhihai (1); Zou, Gangyi (1); Fan, Xuewu (1); Ma, Zhen (1); Chen, Qinfang (1)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS, Shanxi 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:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Based on the wavefront aberration theory and the coordinates transform, the free form optical induced aberration's characteristic of optical system has been analyses in this paper. The optical wavefront error and the free form surface can be express as Fringe Zernike polynomial; the free form optical on the surface (Stop or Entrance pupil or Exit pupil) affects all the field angles equally. If the surface is not the pupil of optical system, the aberration observed is different from the free form itself because the footprint of the beam for an off-axis field point only covers part of the surface. For the Fringe Zernike surface figure on a surface not at pupil, it will transform into lower order Fringe Zernike aberration in the optical system, the relationship between different Fringe Zernike aberration and field is different, and the location zero for the lower aberration always reside at the center of the field of view.
? 2019 SPIE.
Number of references:10
Main heading:Aberrations
Controlled terms:Manufacture - Mirrors - Optical resonators - Optical systems - Optical testing - Surface measurement - Telescopes - Wavefronts
Uncontrolled terms:Coordinates transform - Free-form surface - Optical wavefront - Surface figure - Transform matrices - Wavefront aberrations - Zernike aberrations - Zernike polynomials
Classification code:537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems - 943.2 Mechanical Variables Measurements
DOI:10.1117/12.2504891

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307012270
Title:Experimental and theoretical analysis of the effect of packaging induced thermal stress on high-power laser diode arrays
Authors:Zhang, Hongyou (1, 2); Zah, Chung-En (4); Liu, Xingsheng (2, 3, 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; 710077, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Focuslight Technologies Inc., Xi'an, Shanxi; 710077, China
Corresponding author:Zhang, Hongyou(zhanghy01@focuslight.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10900
Part number:1 of 1
Issue title:High-Power Diode Laser Technology XVII
Issue date:2019
Publication year:2019
Article number:109000T
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510624429
Document type:Conference article (CA)
Conference name:High-Power Diode Laser Technology XVII 2019
Conference date:February 3, 2019 - February 5, 2019
Conference location:San Francisco, CA, United states
Conference code:148277
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:High power laser diodes have been widely utilized in many fields, like industry, scientific research, military and medical treatment, etc. However, thermal stress induced by packaging process due to CTE-mismatch between chip and heat-sink is the main source causing near-field non-linearity along laser bar (also known as "SMILE"), decreasing the degree of polarization (DoP), broadening spectrum, and degrading the lifetime of laser diode array (LDA). In this paper, the effect of packaging induced thermal stress on high power laser diode arrays was studied theoretically and experimentally. The FEM simulation and photoluminescence (PL) experimental results showed the difference of packaging induced thermal stress based on different packaging structures. Spectrally resolved spectrum of LDA showed the packaging induced stress is highest in the middle and rapidly drops near both ends of laser bar, in agreement with our theoretical simulation, resulting in spectral broadening due to blue shifting the lasing wavelength of the center emitter more than the edge emitters.
? COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Semiconductor lasers
Controlled terms:Blue shift - Diodes - High power lasers - Laser beam welding - Laser Doppler velocimeters - Packaging - Power semiconductor diodes - Thermal stress
Uncontrolled terms:Degree of polarization - High power laser diode arrays - Laser diode arrays - Packaging induced stress - Scientific researches - SMILE effect - Spectrum - Theoretical simulation
Classification code:694.1 Packaging, General - 744 Lasers - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2506212
Funding details: Number: 61334010, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61404172, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors would like to thank Ms. Shiyin Jia of Focuslight Technologies Inc. for her experimental support. We also would like to acknowledge the support from the National Natural Science Foundation of China under Grant 61334010 and 61404172.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191806859828
Title:2 μ m vector mode-locked pulses from Tm:Y2O3 ceramics laser
Authors:Zhou, Wei (1, 2); Huang, Haitao (1, 2); Chen, Xiang (1, 2); Wang, Jingru (1, 2); Xu, Rui (1, 2); Wang, Haotian (1, 2); Zhao, Yongguang (1, 2); Tang, Dingyuan (1, 2); Wang, Yishan (3); Shen, Deyuan (1, 2)
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) Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry, Jiangsu Normal University, Xuzhou; 221116, 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
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:29
Issue:4
Issue date:February 27, 2019
Publication year:2019
Article number:045301
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We report on stable passively mode-locked (ML) pulses with Tm:Y2O3 ceramics operating at a 2 μm wavelength range for the first time. With a SESAM, synchronous ML pulses with dual-wavelengths are obtained, with a typical pulse width of 40 ps, a maximum output average power of 240 mW and a pulse repetition rate of ~124 MHz. The output pulses were further proved to be stable polarization-locked vector pulses. To our knowledge, this is also the first observation of vector pulses in 2 μm ML solid-state oscillators.
? 2019 Astro Ltd.
Number of references:34
Main heading:Pulse repetition rate
Controlled terms:Ceramic materials - Laser mode locking - Light polarization - Mode-locked fiber lasers - Passive mode locking - Polarization - Solid state lasers - Solid state oscillators
Uncontrolled terms:Average power - ceramics - Dual wavelength - Maximum output - Output pulse - Passively mode-locked - Ultrafast optics - Wavelength ranges
Classification code:713.2 Oscillators - 741.1 Light/Optics - 744.1 Lasers, General - 744.4 Solid State Lasers - 812.1 Ceramics
Numerical data indexing:Power 2.40e-01W, Size 2.00e-06m, Time 4.00e-11s
DOI:10.1088/1555-6611/aaffc4

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535044
Title:Evaluation on mirror seeing for AIMS solar telescope
Authors:Xia, Yongbo (1, 2); Xie, Yongjun (1); Wang, Peng (1); Mao, Xiang-Long (1); Song, Xuding (2); Xu, Songbo (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Chang'An University, Xi'an; 710064, China
Corresponding author:Xu, Songbo
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520O
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:The primary mirror of AIMS solar telescope is heated during the observation of the sun, leading to temperature rise of the primary mirror. The temperature difference between the primary mirror and the surrounding air may cause the seeing effect (mirror seeing), which is one of the key factors influencing the image qualities of the telescope. In this paper, the temperature fields of the primary mirror and its surrounding air are simulated by the CFD software on the conditions of different ambient wind speeds, different observational angels of the primary mirror, and the duration of observation. According to the calculation of temperature fields, the mirror seeing on different conditions are analyzed and the necessity of thermal control of the primary mirror is evaluated. The evaluation of the mirror seeing is very helpful for the design of thermal control of the primary mirror.
? 2019 SPIE.
Number of references:14
Main heading:Quality control
Controlled terms:Computational fluid dynamics - Image quality - Mirrors - Photonics - Telescopes - Thermal variables control
Uncontrolled terms:Calculation of temperature - Fluid-solid coupling - Primary mirrors - Seeing effect - Solar telescope - Temperature differences - Temperature rise - Thermal control
Classification code:723.5 Computer Applications - 731.3 Specific Variables Control - 741.3 Optical Devices and Systems - 913.3 Quality Assurance and Control
DOI:10.1117/12.2521781
Funding details: Number: XAB2015B29, Acronym: -, Sponsor: -;Number: 2018KW-044, Acronym: -, Sponsor: Key Research and Development Program of Jiangxi Province;Number: 11703072, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:The project is funded by Key Research and Development Program of Shanxi Province (2018KW-044), National Natural Science Foundation of China (NSFC) (11703072) , and West Light Foundation of Chinese Academy of Sciences (XAB2015B29). The authors would like to thank Dr.Shanjie Huang in Yunnan Observatory for the guidance and help of this paper.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006590142
Title:An on-chip photon-pair source with negligible two-photon absoprtion
Authors:Sugiura, Kenta (1); Okamoto, Ryo (1, 2); Zhang, Labao (3); Kang, Lin (3); Chen, Jian (3); Wu, Peiheng (3); Chu, Sai T. (4); Little, Brent E. (5); Takeuchi, Shigeki (1)
Author affiliation:(1) Department of Electronic Science and Engineering, Kyoto University, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto; 615-8510, Japan; (2) PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama; 332-0012, Japan; (3) Research Institute of Superconductor Electronics, Nanjing University, Nanjing; 210023, China; (4) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (5) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:12
Issue:2
Issue date:February 2019
Publication year:2019
Article number:022006
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:While photon-pair sources using silicon waveguides have shown great promise, strong two-photon absorption (TPA) may limit their brightness. Recently, high-index contrast doped glass (HICDG) has attracted attention because of its CMOS compatibility and low propagation loss. It is also expected that TPA in HICDG is small, though it has not yet been directly measured by conventionally used CW pumping. In this paper, we report that the estimated genuine coincidence events by photon-pairs increase quadratically as the pump power increased and do not show any saturation behavior up to 100 mW CW pump power.
? 2019 The Japan Society of Applied Physics.
Number of references:26
Main heading:Photons
Controlled terms:Luminescence of organic solids - Two photon processes
Uncontrolled terms:CMOS compatibility - Doped glass - High index contrast - Low propagation loss - Photon pairs - Saturation behavior - Silicon waveguide - Two photon absorption
Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.7567/1882-0786/aafa0f

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006930191
Title:Nonmechanical two-user tracking method of space-polarization division using the liquid crystal optical phased array
Authors:Guo, Hongru (1); Wang, Xiangru (1); Liu, Xiaopeng (2); He, Xiaoxian (1); Wu, Liang (2); Huang, Xinning (3); Xie, Xiaoping (3); Tan, Qinggui (4); Cao, Jie (5); Xie, Wen (6)
Author affiliation:(1) School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu; 610054, China; (2) School of Physics, University of Electronic Science and Technology of China, Chengdu; 610054, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (4) National Key Laboratory of Science and Technology on Space Microwave, Xi'an; 710100, China; (5) School of optics and photonics, Beijing Institute of Technology, Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing; 100081, China; (6) Dongguan Devine Digital Technology Co. Ltd., Dongguan, Guangdong; 523808, China
Corresponding author:Wang, Xiangru(xiangruwang@uestc.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:447
Issue date:15 September 2019
Publication year:2019
Pages:74-79
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:We propose a two-user tracking method called space-polarization division to enable simultaneously multiple terminals tracking in the field of free space laser communications. This method is based on the nonmechanical beam steering device of liquid crystal optical phased array, which is capable of continuously laser beam pointing and multiple beams generating. An optical architecture of two-user access is presented to show a one-to-two communication link between the relay satellite terminal and user terminals. The two-user tracking strategy is modeled numerically and experimentally verified to show the feasible and agile two-user tracking with a good accuracy less than 50 microradians which meet the requirements of coarse tracking.
? 2019 Elsevier B.V.
Number of references:31
Main heading:Optical communication
Controlled terms:Laser beams - Liquid crystals - Optical links - Polarization
Uncontrolled terms:Beam-steering - Free space laser communications - Laser beam pointing - Nonmechanical - Nonmechanical beam steering - Optical architectures - Optical phased arrays - User tracking
Classification code:717.1 Optical Communication Systems - 744.8 Laser Beam Interactions
DOI:10.1016/j.optcom.2019.05.005
Funding details: Number: 61775026, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871031, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC)(61775026, 61871031)and the National Key R&D Program, China (Grant No.2018YFA0307400), Dongguan City Industry-University-Research Cooperation Project, China, number: 201550921500087.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190206350221
Title:Simulation of microchannel plate photomultiplier tube in high magnetic fields
Authors:Chen, Ping (1, 2, 3, 4); Yuan, Xiaohui (1, 2); Tian, Jinshou (3, 4); Wang, Xing (3); Wen, Wenlong (3); Guo, Lehui (3); Tian, Liping (3); Lu, Yu (3); Liu, Hulin (3); Wei, Yonglin (3); Pei, Chengquan (3); He, Kai (3); Sai, Xiaofeng (3); Wei, Wenqing (1, 2); Deng, Yanqing (1, 2); Zhao, Xu (1, 2)
Author affiliation:(1) Key Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai; 200240, China; (3) Key Laboratory of Ultra-fast photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Chen, Ping(chenping@opt.cn)
Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Abbreviated source title:Nucl Instrum Methods Phys Res Sect A
Volume:936
Issue date:21 August 2019
Publication year:2019
Pages:580-582
Language:English
ISSN:01689002
CODEN:NIMAER
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:The microchannel plate photomultiplier tube (MCP-PMT) used in high energy physics experiments usually needs to be able to operate in strong magnetic fields. In this paper, a 3D MCP-PMT model is developed in CST studio suite to study the magnetic field up to 5 T effect on the photoelectrons traveling from the photocathode to the MCP. Results predict that a growing number of photoelectrons strike back to the photocathode with enhancing magnetic field, which not only decreases electron collection efficiency and gain, but also impairs the photocathode lifetime.
? 2018 Elsevier B.V.
Number of references:10
Main heading:Image storage tubes
Controlled terms:Magnetic fields - Microchannels - Photocathodes - Photoelectrons - Photomultipliers - Photons - Semiconductor quantum wells
Uncontrolled terms:Collection efficiency - Electron collections - High energy physics experiments - MCP-PMT - Micro channel plate - Microchannel-plate photomultiplier tubes - Number of photoelectrons - Strong magnetic fields
Numerical data indexing:Magnetic_Flux_Density 5.00e+00T
DOI:10.1016/j.nima.2018.10.088
Funding details: Number: XAB2017B12, Acronym: -, Sponsor: China Academy of Chinese Medical Sciences;Number: 2018JQ1087, Acronym: -, Sponsor: Shaanxi Provincial Science and Technology Department;Number: 11805267, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:The authors would like to thank Shulin Liu and Tianchi Zhao for the stimulating discussions. This work is supported by grants from Shaanxi Provincial Department of Science and Technology, China (Grant No. 2018JQ1087 ), Xi’an Branch of Chinese Academy of Sciences, China (Grant No. XAB2017B12 ) and National Natural Science Foundation of China (Grant No. 11805267 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748653
Title:Dictionary learning based target detection for hyperspectral image
Authors:Zhang, Xiaorong (1, 2, 3); Hu, Bingliang (1); Pan, Zhibin (2); Zheng, Xi (4)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) Xi'An Jiaotong University, School of Electronic and Information Engineering, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100039, China; (4) Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:110232D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:Target detection of hyperspectral image has always been a hot research topic, especially due to its important applications in military and civilian remote sensing. This paper employs the idea of classification and proposes a novel detection framework which incorporates dictionary learning and discriminative information. Due to the fact that target pixels lie in different subspace with background pixels, a novel detection model is proposed. In addition, a linear kernel is applied to project the image data into high-dimensional space, separating the target pixels and background pixels. Synthetic image and popular real hyperspectral image are used to evaluate our algorithm. Experimental results indicate that our proposed detector outperforms the traditional detection methods.
? 2019 SPIE.
Number of references:24
Main heading:Radar target recognition
Controlled terms:Classification (of information) - Hyperspectral imaging - Military applications - Military photography - Pixels - Remote sensing - Spectroscopy - Target tracking
Uncontrolled terms:Background pixels - Detection framework - Detection methods - Detection models - Dictionary learning - discriminative information - High dimensional spaces - Hot research topics
Classification code:404.1 Military Engineering - 716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment
DOI:10.1117/12.2519943
Funding details: Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Acknowledgments This research has been partially supported by National Natural Science Foundation of China (NSFC)

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192507062928
Title:Saliency weighted RX hyperspectral imagery anomaly detection
Title of translation:显著性权重RX高光谱异常点检测
Authors:Liu, Jiacheng (1, 2); Wang, Shuang (1); Liu, Weihua (1); Hu, Bingliang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optical and Precision Machinery, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Yaogan Xuebao/Journal of Remote Sensing
Abbreviated source title:Yaogan Xuebao/J. Remote Sens.
Volume:23
Issue:3
Issue date:May 25, 2019
Publication year:2019
Pages:418-430
Language:Chinese
ISSN:10074619
E-ISSN:20959494
Document type:Journal article (JA)
Publisher:Science Press
Abstract:With the development of spectral imaging technique and its data processing technology, anomaly detection using hyperspectral data has become a popular topic. Anomaly detection refers to the search for sparse pixels of unknown spectral signals in hyperspectral imagery. Given that the anomaly detection is unsupervised, providing a priori information is necessary. Thus, anomaly detection has a strong practicality. Considering the lack of spatial correlation and low normal distribution adaptation, the traditional RX algorithm has an inaccurate background estimation. Thus, this algorithm is unsuitable for detecting hyperspectral data. In this study, a saliency weighted RX algorithm is proposed on the basis of the local neighborhood spectra of an image. When the human eye observes an image, the first object that is viewed is frequently the most significant. The significance of the saliency detection algorithm is to identify this goal. The saliency map is a 2D image of the same size as the original image to represent the significance of the corresponding pixel in the original image. In this algorithm, the image background modeling based on probability density is improved by introducing a saliency analysis method. Afterward, the spectral saliency map is established, and the mean vector and covariance matrix of the RX algorithm are redefined. Saliency weighted RX algorithm provides different weights to optimize the background estimation. Anomaly detection experiments are conducted using synthetic and real hyperspectral data. Synthetic data experimental results show that, for each target, the number of anomalies detected using the saliency weighted RX algorithm is more than that of the traditional algorithms, and the saliency weighted RX algorithm can detect anomalies with abundance below 0.1. By contrast, traditional algorithms cannot detect these anomalies. Moreover, the false alarm pixels of the traditional algorithms are distributed in various positions, whereas the saliency weighted RX algorithm concentrates on an area called a false alarm area. This area can be removed effectively by morphological filtering. Real data experimental results show that the saliency weighted RX algorithm corresponds to the largest AUC value and has the optimal detection results. The traditional RX algorithm assumes that the background model follows a multivariate Gaussian distribution and does not perform well in hyperspectral imagery. The method of saliency analysis in the field of computer vision can be effectively analyzed in the spatial domain. This phenomenon compensates for the shortcomings of the RX algorithm to ignore spatial correlation, thus detecting the anomalies synchronized in the spatial and spectral domains. The saliency weighted RX algorithm uses a saliency analysis method to provide the background and anomaly pixels with a different weight, thereby improving the adaptability of the background model. Through the experiment of synthetic and real data, the saliency weighted algorithm can improve the detection probability while reducing the false alarm rate in comparison with the traditional RX algorithm and has a certain anti-noise ability.
? 2019, Science Press. All right reserved.
Number of references:22
Main heading:Anomaly detection
Controlled terms:Alarm systems - Covariance matrix - Data handling - Errors - Hyperspectral imaging - Image enhancement - Image segmentation - Normal distribution - Pixels - Remote sensing - Spectroscopy
Uncontrolled terms:Detection probabilities - Hyper-spectral imageries - Morphological filtering - Multivariate Gaussian Distributions - RX algorithm - Saliency - Spectral imaging technique - Synthetic and real data
Classification code:723.2 Data Processing and Image Processing - 921 Mathematics - 922.1 Probability Theory
DOI:10.11834/jrs.20197074
Funding details: Number: 11327303, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61405239, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61501456, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (No. 61501456, 11327303, 61405239); Chinese Academy of Sciences Western Youth Scholars Program Foundation (No.XAB2016B20);

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307011885
Title:Linear space-variant optical cryptosystem via Fourier ptychography
Authors:Pan, An (1, 2); Wen, Kai (3); 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, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710071, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Abbreviated source title:Progr. Biomed. Opt. Imaging Proc. SPIE
Volume:10887
Part number:1 of 1
Issue date:2019
Publication year:2019
Article number:108872C
Language:English
ISSN:16057422
Document type:Conference article (CA)
Conference name:Quantitative Phase Imaging V 2019
Conference date:February 2, 2019 - February 5, 2019
Conference location:San Francisco, CA, United states
Conference code:148276
Sponsor:Phi Optics, Inc.; The Society of Photo-Optical Instrumentation Engineers (SPIE); Tomocube, Inc.
Publisher:SPIE
Abstract:Optical cryptography has attracted extensive interest because of the inherent nature of parallel and multidimensional capability of optical information processing compared with computer cryptography. However, the linear space-invariant (LSI) cryptosystems are easy to be simulated and may be vulnerable to different attacks. To resist attacks, several phasetruncated Fourier transforms based asymmetric cryptosystem are proposed to utilize the nonlinear operations in the LSI system, but they are proved to be vulnerable due to the inherent nature of LSI system. Notice that several works misunderstand the concept of nonlinear operations to the nonlinear systems. But the nonlinear systems are not easy to be achieved. Herein, an optical cryptosystem based on Fourier ptychography (FP) with double random phase masks is proposed. The encryption process cannot be precisely simulated but only by optical experiment due to the vignetting effect, which is linear space-variant (LSV) and can act as an one-way function from the perspective of optics purely and guarantee the security of our system. In addition, the encryption for a high resolution, large field-of-view and complexvalued image is achievable. Optical experiments are presented to prove the validity and the security of the proposed system. Our method would give more insights to separate the optical cryptography from computer cryptography in nature.
? 2019 SPIE.
Number of references:36
Main heading:Cryptography
Controlled terms:Fourier transforms - LSI circuits - Nonlinear systems - Optical data processing - Pattern recognition - Signal processing
Uncontrolled terms:Asymmetric cryptosystem - Computational imaging - Fourier - Fourier optics and signal processing - Large field of views - Nonlinear operation - Optical experiments - Optical security and encryptions
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 921.3 Mathematical Transformations - 961 Systems Science
DOI:10.1117/12.2509001
Funding details: Number: 61377008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was financially supported by National Natural Science Foundation of China (NSFC) (81427802 and 61377008).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106949252
Title:Reconfigurable microwave photonic transversal filter based on an integrated optical micro-comb source
Authors:Xu, Xingyuan (1); Wu, Jiayang (1); Tan, Mengxi (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3000, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (4) Xi'An Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an, China; (5) INRS -énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10921
Part number:1 of 1
Issue title:Integrated Optics: Devices, Materials, and Technologies XXIII
Issue date:2019
Publication year:2019
Article number:1092104
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510624849
Document type:Conference article (CA)
Conference name:Integrated Optics: Devices, Materials, and Technologies XXIII 2019
Conference date:February 4, 2019 - February 7, 2019
Conference location:San Francisco, CA, United states
Conference code:147853
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:We demonstrate an 80-tap radio frequency (RF) transversal filter based on a 49GHz-spacing integrated micro-comb source. By employing a record 80 micro-comb lines, or taps, for the transversal filter, we achieve very high performance including a QRF factor more than four times higher than previous results. Our experimental results match well with theory, showing that our transversal filter is a competitive solution to implement advanced adaptive RF filters with high frequency selectivity and reconfigurability, and with potentially lower cost and footprint. This approach is promising for applications in modern radar and satellite communications systems.
? 2019 SPIE.
Number of references:46
Main heading:Transversal filters
Controlled terms:Comb filters - Integrated optics - Microwave filters - Optical resonators - Optical signal processing - Satellite communication systems - Signal processing
Uncontrolled terms:High-frequency selectivity - Microring resonator - Microwave Photonics - Optical frequency combs - Radio frequencies - Reconfigurability - Reconfigurable - Satellite communications system
Classification code:655.2.1 Communication Satellites - 703.2 Electric Filters - 716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems
DOI:10.1117/12.2508152
Funding details: Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program (No. DP150104327). RM acknowledges support by Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program. He also acknowledges additional support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program (grant 074-U 01) by the 1000 Talents Sichuan Program.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20182205264544
Title:Describing video with attention-based bidirectional LSTM
Authors:Bin, Yi (1); Yang, Yang (1); Shen, Fumin (1); Xie, Ning (1); Shen, Heng Tao (1); Li, Xuelong (2)
Author affiliation:(1) Center for Future Media, School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu; 611731, China; (2) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Yang, Yang(dlyyang@gmail.com)
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:49
Issue:7
Issue date:July 2019
Publication year:2019
Pages:2631-2641
Article number:8365878
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Video captioning has been attracting broad research attention in the multimedia community. However, most existing approaches heavily rely on static visual information or partially capture the local temporal knowledge (e.g., within 16 frames), thus hardly describing motions accurately from a global view. In this paper, we propose a novel video captioning framework, which integrates bidirectional long-short term memory (BiLSTM) and a soft attention mechanism to generate better global representations for videos as well as enhance the recognition of lasting motions in videos. To generate video captions, we exploit another long-short term memory as a decoder to fully explore global contextual information. The benefits of our proposed method are two fold: 1) the BiLSTM structure comprehensively preserves global temporal and visual information and 2) the soft attention mechanism enables a language decoder to recognize and focus on principle targets from the complex content. We verify the effectiveness of our proposed video captioning framework on two widely used benchmarks, that is, microsoft video description corpus and MSR-video to text, and the experimental results demonstrate the superiority of the proposed approach compared to several state-of-the-art methods.
? 2013 IEEE.
Number of references:58
Main heading:Long short-term memory
Controlled terms:Brain - Decoding - Feature extraction - Flow visualization - Recurrent neural networks - Semantics - Visual languages
Uncontrolled terms:Bidirectional long-short term memory (BiLSTM) - Grammar - Natural languages - temporal attention - video captioning
DOI:10.1109/TCYB.2018.2831447

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190106330639
Title:Multidimensional Manipulation of Photonic Spin Hall Effect with a Single-Layer Dielectric Metasurface
Authors:Li, Siqi (1, 2); Li, Xingyi (1, 2); Wang, Guoxi (1, 2); Liu, Sheng (3); Zhang, Lingxuan (1, 2); Zeng, Chao (1, 2); Wang, Leiran (1, 2); Sun, Qibing (1, 2); 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 (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an; 710129, China
Corresponding author:Wang, Guoxi(wangguoxi@opt.cn)
Source title:Advanced Optical Materials
Abbreviated source title:Adv. Opt. Mater.
Volume:7
Issue:5
Issue date:March 5, 2019
Publication year:2019
Article number:1801365
Language:English
E-ISSN:21951071
Document type:Journal article (JA)
Publisher:Wiley-VCH Verlag
Abstract:The photonic spin Hall effect, originating from photonic spin–orbit interactions, has attracted considerable research interest due to its potential for applications in spin-controlled nanophotonics. However, most research efforts have focused only on 1D modulation, including transverse or longitudinal spin-dependent splitting. Here, a novel method is proposed for multidimensional spin-dependent splitting on a single-layer dielectric metasurface. Due to the interplay of the Pancharatnam–Berry phase and dynamic phase, the longitudinal focusing and transverse shifting of the different spin state photons can be simultaneously achieved. Moreover, the conjugated characteristic of the modulated phases of Pancharatnam–Berry phase metasurfaces for different spin photons can be broken, and both symmetric and asymmetric transverse spin-dependent splitting are obtained with the proposed method. This method can be used for the multidimensional and flexible manipulation of spin photons and has potential in spin-controlled nanophotonics, ranging from optical communication to beam shaping and optical sensors.
? 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Number of references:45
Main heading:Spin Hall effect
Controlled terms:Crystal symmetry - Fruits - Nanophotonics - Optical communication - Photons
Uncontrolled terms:Beam-shaping - Berry phase - Dynamic phase - Flexible manipulations - Metasurfaces - Modulated phasis - Research efforts - Research interests
DOI:10.1002/adom.201801365
Funding details: Number: -, Acronym: -, Sponsor: Northwestern Polytechnical University;Number: -, Acronym: -, Sponsor: Ministry of Education;Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: Beijing Institute of Genomics, Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: University of Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: 61675231, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:S. Q. Li, X. Y. Li, Prof. G. X. Wang, Dr. L. X. Zhang, Prof. C. Zeng, Prof. L. R. Wang, Prof. Q. B. Sun, Prof. W. Zhao, Prof. W. F. Zhang 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 E-mail: wangguoxi@opt.cn; wfuzhang@opt.ac.cn S. Q. Li, X. Y. Li, Prof. G. X. Wang, Dr. L. X. Zhang, Prof. C. Zeng, Prof. L. R. Wang, Prof. Q. B. Sun, Prof. W. Zhao, Prof. W. F. Zhang University of Chinese Academy of Sciences Beijing 100049, China Prof. S. Liu Key Laboratory of Space Applied Physics and Chemistry Ministry of Education and Shaanxi Key Laboratory of Optical Information Technology School of Science Northwestern Polytechnical University Xi’an 710129, ChinaThis work was supported by the National Natural Science Foundation of China (Grant No. 61635013; 61675231; 61475188; and 61705257) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB24030600).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20185106275805
Title:Design and Electrical Analysis of Multi-Electrode Cylindrical Dielectric Barrier Discharge Plasma Reactor
Authors:Niu, Guanghui (1); Guo, Guangmeng (2); Tang, Jie (3); Li, Yanping (4); Wang, Xu (5); Duan, Yixiang (5)
Author affiliation:(1) School of Aeronautics and Astronautics, Research Center of Analytical Instrumentation, Sichuan University, Chengdu; 610065, China; (2) College of Instrumentation and Electrical Engineering, Jilin University, Changchun; 130061, 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) School of Chemical Engineering, Research Center of Analytical Instrumentation, Sichuan University, Chengdu; 610065, China; (5) Research Center of Analytical Instrumentation, School of Manufacturing Science and Engineering, Sichuan University, Chengdu; 610064, China
Corresponding author:Duan, Yixiang(yduan@scu.edu.cn)
Source title:IEEE Transactions on Plasma Science
Abbreviated source title:IEEE Trans Plasma Sci
Volume:47
Issue:1
Issue date:January 2019
Publication year:2019
Pages:419-426
Article number:8574960
Language:English
ISSN:00933813
CODEN:ITPSBD
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Dielectric barrier discharges (DBDs), due to its unique advantages such as simple design and low operation cost, have gained more and more attention all over the world. However, traditional plasma reactor can always have capacitive current with high peak values, which limits its further application in fields such as plasma catalytic reactions and surface treatment. In this proposed work, a new device named multielectrode cylindrical plasma reactor was presented, where the outer electrode was divided into several strips connected in parallel. The comparative electrical analysis was performed between the multielectrode plasma reactor and the traditional device. The experimental results showed that the multielectrode plasma reactor could give a much lower capacitive current peak value, namely, 5.49 mA compared with 16.26 mA of the traditional one, indicating that the new plasma reactor could decrease the capacitive current to a large extent as designed. In addition, due to the enhanced corona discharge, both the lifetime and peak values of the generated microdischarges were distributed more uniformly and concentrated in a small scale. In addition, the consumed energy by the designed multielectrode plasma reactor was decreased by 29.51% of the traditional plasma reactor, namely, 11.58 W compared with 16.43 W. The discharge mode was analyzed and determined to be mainly filament discharge with enhanced corona discharge at the electrode edges. In conclusion, the plasma reactor with proposed design can give a decreased capacitive current and also the consumed energy, which is helpful in broadening the application field of DBD in plasma catalysis fields.
? 2018 IEEE.
Number of references:39
Main heading:Electric discharges
Controlled terms:Catalysis - Dielectric devices - Dielectric materials - Electric corona - Electrodes - Plasma applications - Plasma sources - Surface reactions - Surface treatment
Uncontrolled terms:Capacitive currents - Catalytic reactions - Cylindrical dielectric barrier discharges - Cylindrical plasmas - Dielectric barrier discharges - Electrical analysis - Plasma reactors - Traditional devices
Numerical data indexing:Electric_Current 1.63e-02A, Electric_Current 5.49e-03A, Power 1.16e+01W, Power 1.64e+01W
DOI:10.1109/TPS.2018.2883944
Funding details: Number: 2018SCUH0015, Acronym: -, Sponsor: -;Number: 61605134, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Manuscript received April 19, 2018; revised September 24, 2018; accepted November 26, 2018. Date of publication December 13, 2018; date of current version January 8, 2019. This work was supported in part by the National Natural Science Foundation of China under Grant 61605134 and in part by the Innovative Spark Project of Sichuan University under Grant 2018SCUH0015 and Grant 2018SCUH0043. The review of this paper was arranged by Senior Editor S. J. Gitomer. (Corresponding author: Yixiang Duan.) G. Niu is with the School of Aeronautics and Astronautics, Research Center of Analytical Instrumentation, Sichuan University, Chengdu 610065, China.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184506050720
Title:3G structure for image caption generation
Authors:Yuan, Aihong (1, 2); Li, Xuelong (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:330
Issue date:22 February 2019
Publication year:2019
Pages:17-28
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:It is a big challenge of computer vision to make machine automatically describe the content of an image with a natural language sentence. Previous works have made great progress on this task, but they only use the global or local image feature, which may lose some important subtle or global information of an image. In this paper, we propose a model with 3-gated model which fuses the global and local image features together for the task of image caption generation. The model mainly has three gated structures. (1) Gate for the global image feature, which can adaptively decide when and how much the global image feature should be imported into the sentence generator. (2) The gated recurrent neural network (RNN) is used as the sentence generator. (3) The gated feedback method for stacking RNN is employed to increase the capability of nonlinearity fitting. More specially, the global and local image features are combined together in this paper, which makes full use of the image information. The global image feature is controlled by the first gate and the local image feature is selected by the attention mechanism. With the latter two gates, the relationship between image and text can be well explored, which improves the performance of the language part as well as the multi-modal embedding part. Experimental results show that our proposed method outperforms the state-of-the-art for image caption generation.
? 2018
Number of references:48
Main heading:Image enhancement
Controlled terms:Computer vision - Deep learning - Recurrent neural networks
Uncontrolled terms:Attention mechanisms - Convolutional neural network - Global informations - Image caption - Image information - Local image features - Multi-modal learning - Recurrent neural network (RNN)
DOI:10.1016/j.neucom.2018.10.059
Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDB-SSWJSC015, Acronym: -, Sponsor: Chinese Academy of Sciences Key Technology Talent Program;Number: QYZDY-SSW-JSC044, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: 61472413, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant nos. 61761130079, 61472413, and 61772510, in part by the Key Research Program of Frontier Sciences, CAS, under Grant no. QYZDY-SSW-JSC044, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant no. QYZDB-SSWJSC015 and in part by the National Key R&D Program of China no. 2017YFB0502900. Aihong Yuan is currently pursuing the Ph.D. degree with the Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi, P. R. China. His research interests include image/video content understanding and deep learning. Xuelong Li is currently a Full Professor with the Center for OPTical Imagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China. Xiaoqiang Lu is a Full Professor with the Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi, P. R. China.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190206352847
Title:Polarization-based plug-and-play measurement-device-independent quantum key distribution
Authors:Hu, Min (1); Zhang, Litao (1); Guo, Banghong (1, 2, 3, 4); Li, Jun (5)
Author affiliation:(1) Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou; 510006, China; (2) College of Computer Science and Software Engineering, Shenzhen University, Shenzhen; 518060, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei; 230026, China; (5) South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou; 510006, China
Corresponding author:Guo, Banghong(guobangh@163.com)
Source title:Optical and Quantum Electronics
Abbreviated source title:Opt Quantum Electron
Volume:51
Issue:1
Issue date:January 1, 2019
Publication year:2019
Article number:22
Language:English
ISSN:03068919
E-ISSN:1572817X
CODEN:OQELDI
Document type:Journal article (JA)
Publisher:Springer New York LLC
Abstract:Measurement-device-independent quantum key distribution (MDI-QKD) has received much attention, with the goal of overcoming all of the security loopholes caused by an imperfect detection system. We here propose a plug-and-play MDI-QKD (P&P MDI-QKD) scheme whereby an untrusted relay node, Charlie, owns a laser and sends photons to Alice and Bob. Alice (Bob) modulates the polarization of the incident photons and returns them to Charlie. Charlie uses a modified Bell state analyzer (BSA) to perform Bell state measurements (BSM). In comparison with the original version of MDI-QKD, our scheme exploits a single untrusted laser as the photon source. This makes the signal photons identical and enhances the Hong-Ou-Mandel effect. Second, because of the P&P structure, the setup can automatically eliminate the birefringence influence of the fibers, which makes the setup highly stable. Finally, our modified BSA can identify | Φ? + and | Φ? - of four Bell states with polarization encoding but not | Ψ? + and | Ψ? -. Based on practical experimental parameters, a simulation showed that the maximum theoretical secure transmission distance could reach more 280 km.
? 2019, Springer Science+Business Media, LLC, part of Springer Nature.
Number of references:38
Main heading:Quantum cryptography
Controlled terms:Photons - Polarization
Uncontrolled terms:Bell state analyzers - Bell-state measurements - Detection system - Experimental parameters - Measurement device - Plug and play - Polarization encoding - Secure transmission
Classification code:931.3 Atomic and Molecular Physics
Numerical data indexing:Size 2.80e+05m
DOI:10.1007/s11082-018-1736-1
Funding details: Number: KQI201508, Acronym: -, Sponsor: -;Number: SKLST201602, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 201001D0104799318, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 61572203, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Acknowledgements This work is financially supported by the National Natural Science Foundation of China (Grant No. 61572203); the Open Research Fund (Grant No. KQI201508) of the Key Lab of Quantum Information, Chinese Academy of Sciences; the Open Research Fund (Grant No. SKLST201602) of the State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences; and Guangdong Innovative Research Team Program (Grant No. 201001D0104799318).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184506049935
Title:Chemical etching mechanisms and crater morphologies pre-irradiated by temporally decreasing pulse trains of femtosecond laser
Authors:Du, Kun (1); Jiang, Lan (1); Li, Xiaowei (1); Zhang, Hao (1); Wang, Andong (1); Yao, Zhulin (1); Pan, Changji (1); Wang, Zhi (1); Li, Ming (2); Grigoropoulos, Costas P. (3); Lu, Yongfeng (4)
Author affiliation:(1) Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, 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) Laser Thermal Laboratory, Department of Mechanical Engineering, University of California, 6129 Etcheverry Hall, Berkeley; CA; 94720-1740, United States; (4) Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln; NE; 68588-0511, United States
Corresponding author:Jiang, Lan(jianglan@bit.edu.cn)
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:469
Issue date:1 March 2019
Publication year:2019
Pages:44-49
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:We report the influence of temporally decreasing pulse trains on femtosecond laser-induced chemical etching (FLICE) of fused silica. A systematic comparison of the unshaped pulse and decreasing pulse trains of femtosecond laser for FLICE was conducted, and the differences were interpreted using a plasma model. The results revealed that the decreasing pulse trains not only affected the etching efficiency but also affected the morphology of the etched crater. When an etched crater was pre-irradiated by decreasing pulse trains, it presented a funnel-like shape at the early stage of the etching process, which contrasted with the one pre-irradiated by unshaped pulse. At the later stage of the etching process, the funnel-like shape gradually disappeared, and the crater increased in size. Compared with the unshaped pulse under the same processing conditions, the decreasing pulse trains enhanced the etched crater volume by approximately 18 times. Theoretical calculations based on the plasma model indicated that the free-electron density generated using the unshaped pulse was much higher than that generated by the decreasing pulse trains in skin layer of the sample during the first few hundred femtoseconds. The high free-electron density increased the reflectivity in skin layer of the sample; thus, the tail part of the incident pulse was strongly reflected. Consequently, the laser energy deposition into the fused silica sample decreased, eventually led to a low etching efficiency.
? 2018
Number of references:19
Main heading:Fused silica
Controlled terms:Carrier concentration - Electron density measurement - Electrons - Etching - Femtosecond lasers - Mechanisms - Morphology
Uncontrolled terms:Chemical etching - Crater morphology - Etching efficiency - Free-electron density - Laser energy deposition - Processing condition - Pulse train - Theoretical calculations
Classification code:601.3 Mechanisms - 701.1 Electricity: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 812.3 Glass - 951 Materials Science
DOI:10.1016/j.apsusc.2018.10.272
Funding details: Number: 2016QNRC001, Acronym: YSU, Sponsor: Youngstown State University;Number: 2018YFB1107200, Acronym: SKLDMVB, Sponsor: State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body;Number: 3172027, Acronym: -, Sponsor: Beijing Municipal Natural Science Foundation;Number: 51605029, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 51675049, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research was supported by the National Key R&D Program of China (2018YFB1107200), National Natural Science Foundation of China (NSFC) (51675049, 51605029); Beijing Municipal Natural Science Foundation (3172027); Young Elite Scientists Sponsorship Program, China (2016QNRC001).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106969526
Title:Research on underwater high-speed blue-green optical communication technology based on blue LD array
Authors:Han, Yi (1, 2); Zheng, Yunqiang (1); Shi, Kui (1); Wang, Tao (1); Xie, Xiaoping (1); Meng, Jiacheng (1); Wang, Wei (1); Duan, Tao (1); Han, Biao (1); Wan, Rengang (2); Sun, Kelin (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 Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (3) Laboratory of Deep-sea Video Technology, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan; 572000, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11068
Part number:1 of 1
Issue title:Second Symposium on Novel Technology of X-Ray Imaging
Issue date:2019
Publication year:2019
Article number:110680U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510628267
Document type:Conference article (CA)
Conference name:2nd Symposium on Novel Technology of X-Ray Imaging
Conference date:November 26, 2018 - November 28, 2018
Conference location:Hefei, China
Conference code:148066
Sponsor:China Institute of Atomic Energy; Institute of High Energy Physics, Chinese Academy of Sciences; National Synchrotron Radiation Laboratory, University of Science and Technology China; North Night Vision Technology Company Ltd.; Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Publisher:SPIE
Abstract:In underwater wireless optical communication (UWOC), one of the key technologies is to generate high-speed communication signal for transmitter. In this paper, we designed such transmitter based on laser diode (LD) arrays, which is composed of three LDs with central wavelength 450nm. The modulation format is non-return-to-zero on-off keying (NRZ-OOK) with data rate up to 50Mbps. Using such transmitter, we established a point-to-point underwater wireless optical communication link in an experimental tank with 20m length, 20m width and 14 depth. The experimental results show that the maximum error-free data rate of the system can reach 50Mbps with 10.7m transmission distance, while the maximum error-free transmission rate is 30Mbps with 14.7m transmission distance. These results verify the feasibility of the LD-based modulation scheme for high-speed UWOC applications.
? COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Optical communication
Controlled terms:Modulation - Transmitters - Underwater acoustics
Uncontrolled terms:Blue LD - High-speed communications - Non-return to zeros - Optical communication technologies - Transmission distances - Underwater optical communications - Underwater wireless optical communications - Wireless optical communication
Classification code:717.1 Optical Communication Systems - 751.1 Acoustic Waves
Numerical data indexing:Bit_Rate 3.00e+07bit/s, Bit_Rate 5.00e+07bit/s, Size 1.07e+01m, Size 1.47e+01m, Size 2.00e+01m, Size 4.50e-07m
DOI:10.1117/12.2523916
Funding text:This work is supported by National key research and development plan (2017YFC0803900, 2018YFC0307904), The Strategic Pilot Science and Technology Special Class B of the Chinese Academy of Sciences (XDB06000000), Director of the State Key Laboratory of Marine Science and Technology of Qingdao (QNLM201716), 2017 Hainan Provincial Major Science and Technology Plan Project (ZDKJ2017005).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5614203
Title:Probability analysis and control of river runoff-sediment characteristics based on pair-copula functions: The case of the Weihe River and Jinghe River
Authors:You, Qiying (1, 2, 3, 4); Jiang, Hao (5); Liu, Yan (1, 3, 4); Liu, Zhao (1, 3, 4); Guan, Zilong (1, 3, 4)
Author affiliation:(1) School of Environmental Science and Engineering, Chang'an University, 126 Yanta Road, Xi'an; 710054, China; (2) College of Science, Chang'an University, Xi'an; 710064, China; (3) Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Ministry of Education, Chang'an University, 126 Yanta Road, Xi'an; 710054, China; (4) Institute ofWater and Development, Chang'an University, 126 Yanta Road, Xi'an; 710054, China; (5) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710070, China
Corresponding author:You, Qiying(qiyingyou@163.com)
Source title:Water (Switzerland)
Abbreviated source title:Water
Volume:11
Issue:3
Issue date:2019
Publication year:2019
Article number:510
Language:English
E-ISSN:20734441
Document type:Journal article (JA)
Publisher:MDPI AG, Postfach, Basel, CH-4005, Switzerland
Abstract:Analyzing the encounter frequency of high-low runoff and sediment yield is important for the appropriate dispatching of runoff-sediment resources, as well as river regulation. However, there have been no reports on the utilization of the pair-copula function in analyzing the runoff-sediment characteristics from a probabilistic perspective and conducting probability control on the runoff-sediment yields of different hydrologic stations. This paper builds marginal distribution functions on the basis of kernel distribution theory. In addition, this paper builds the joint distribution functions through pair-copula functions in order to analyze the encounter probability and the compensation characteristics of high-low runoff and sediment at different stations on the Weihe River in China, as well as the origins of runoff-sediment, to conduct probability control of river runoff-sediment resource allocation. The results show that, in different periods, the synchronous probability of high-low runoff of theWeihe River's Xianyang and Huaxian Stations, and the Jinghe River's Zhangjiashan Station differ, while that of high-low sediment at the three stations changes little-remaining at around 54%. Therefore, the sediment and runoff of theWeihe River apparently have different origins. In years of high and low runoff, if the runoffs of the Xianyang and Zhangjiashan Stations can be kept within a certain range, then the runoff of the Huaxian Station will be in a particular range, at a certain probability. Sediment at the Huaxian Station can be controlled, in a similar way. These results are of great significance for the water and sediment management department of the Weihe river, in order to reasonably allocate water and sediment resources.
? 2019 by the authors.
Number of references:45
Controlled terms:fluvial deposit - numerical method - probability - runoff - sediment property - sediment yield
Geographic terms:China - Jing River - Wei River
Classification code:71.4.3 Sediments and sedimentary processes - transport - 72.5.3 Sediments and sedimentary processes - transport
DOI:10.3390/w11030510
Funding details: Number: 41471452, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: B08039, Acronym: MOE, Sponsor: Ministry of Education;
Funding text:This research is funded by the '111' Discipline Innovation and Intelligence Base Project of Hydro-Eco and Water Security in Arid and Semi-Arid Regions, proposed by the Ministry of Education and State Administration of Foreign Experts Affairs P. R. China (Grant No. B08039); the Natural Science Basic Research Plan in Shaanxi Province of China (2018JM1045); the Xi'an Construction Science and Technology Planning Project (SJW2017-11); the National Natural Science Foundation of China (41471452); the Special Fund for Basic Scientific Research Operating Expenses of Central Universities (natural science) (310829161010, the Effects of Water-Saving Irrigation Patterns on Groundwater in Northwest Area); and the Special Fund for Basic Scientific Research of Central Colleges (Program No. 300102299206).

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006917117
Title:MAP Detection of Probabilistically Shaped Constellations in Optical Fiber Transmissions
Authors:Hu, Shaohua (1); Zhang, Wenjing (1); Yi, Xingwen (2); Li, Zhaohui (2); Li, Fan (2); Huang, Xinning (3); Zhu, Mingyue (1); Jingzhang (1); Qiu, Kun (1)
Author affiliation:(1) Key Lab. of Optical Fiber Sensing and Communications, University of Electronic Science and Technology of China, Chengdu; 611731, China; (2) School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou; 510275, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China
Source title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.
Part number:1 of 1
Issue title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Issue date:April 22, 2019
Publication year:2019
Article number:8696456
Language:English
ISBN-13:9781943580538
Document type:Conference article (CA)
Conference name:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019
Conference date:March 3, 2019 - March 7, 2019
Conference location:San Diego, CA, United states
Conference code:147617
Sponsor:3M Science Applied to Life; AC Photonics, Inc.; Acacia Communications, Inc.; AIM Photonics; Alibaba Group; et al.
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We present the theoretical analysis and experimental demonstration of MAP detection that outperforms the conventional detection for probabilistically shaped constellations in optical fiber transmissions. Larger BER improvements are observed for the stronger shaped constellations.
? 2019 OSA.
Number of references:8
Main heading:Optical fiber communication
Controlled terms:Light transmission - Optical fibers
Uncontrolled terms:Ber improvements - Conventional detection - Experimental demonstrations - MAP detection - Optical fiber transmission
Classification code:717.1 Optical Communication Systems - 741.1 Light/Optics - 741.1.2 Fiber Optics
Funding details: Number: 61871082, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871408, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by NSFC (No. 61871408, and 61871082), Science and Technology Planning Project of Guangdong Province (2017B010123005); Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X12).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407327719
Title:Topological Charge in Situ Measuring of Perfect Optical Vortex
Title of translation:完美涡旋光拓扑荷的原位测定
Authors:Ren, Fei-Fei (1, 2); Liang, Yan-Sheng (1); Cai, Ya-Nan (1, 2); He, Min-Ru (1); Lei, Ming (1); Yao, Bao-Li (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yao, Bao-Li(yaobl@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:7
Issue date:July 1, 2019
Publication year:2019
Article number:0726001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In order to determine the topological charge of a Perfect Optical Vortex (POV), a in-line interferometric measurement method was presented. The basic idea is to use a spatial light modulator to produce a POV and a spherical wave simultaneously. By modulating the divergence angle of the spherical wave, the POV and the spherical wave interfer. The number of interference fringes is used to realize the direct and rapid measurement of topological charge. Simulated and experimental results show that the interference fringes obtained by the method can be used to determine the topological charge of POVs, including the magnitude and symbol. Furthermore, the proposed in situ method is demonstrated to determine the topological charge of the POV array by measuring the interference pattern of a perfect vortex array and a spherical wave. The proposed in situ method is simple and effective. Therefore, it is of a significance for the application of orbital angular momentum control and information coding based on POVs.
? 2019, Science Press. All right reserved.
Number of references:30
Main heading:Light modulators
Controlled terms:Fourier transforms - Interferometry - Light modulation - Spheres - Topology - Vortex flow
Uncontrolled terms:Information coding - Interference fringe - Interference patterns - Interferometric measurement - Optical vortices - Orbital angular momentum - Spatial light modulators - Topological charges
Classification code:631.1 Fluid Flow, General - 741.1 Light/Optics - 921.3 Mathematical Transformations - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 941.4 Optical Variables Measurements
DOI:10.3788/gzxb20194807.0726001
Funding details: Number: 11474352, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11574389, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (Nos. 81427802, 11474352, 11574389).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407330841
Title:Research on the Spatio-temporal and Gain Performances on the Small-size Streak Tube
Title of translation:小型条纹管时空分辨及增益特性研究
Authors:Tian, Li-Ping (1, 2); Wen, Wen-Long (1); Wang, Xing (1); Chen, Ping (1); Hui, Dan-Dan (1, 2); Lu, Yu (1); Tian, Jin-Shou (1, 3); Zhao, Wei (1, 3)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Tian, Jin-Shou(tianjs@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:7
Issue date:July 1, 2019
Publication year:2019
Article number:0723002
Language:English
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:Based on the small-size streak tube, the dependence of the physical temporal resolution and temporal distortion on the factors including initial energy of electrons generated from the photocathode and spherical photocathode curvature radius is numerically simulated. The simulation results show that the physical temporal resolution is greatly affected by the initial energy, which is less affected by the spherical curvature radius and off-axis distance; the temporal distortion increases with the off-axis distance. Furthermore, the streak tube with a flat photocathode has a positive temporal distortion. With the decrease of the radius of curvature of the photocathode, the temporal distortion gradually changes from positive value to negative ones. And, when the photocathode curvature radius is 70 mm, the temporal distortion can be reduced to 8 ps and the spatial resolution can reach 25 lp/mm @ MTF=10%, the curvature of the slit image can be almost neglected even though the off-axis distance is 8 mm. Besides, the static spatial resolution and luminance gain of the streak tube, the luminance photocathode sensitivity of the photocathode are tested experimentally. The experiment results show that the spatial resolution of the streak tube is higher than 28 lp/mm at the photocathode center while it is higher than 18 lp/mm at the edge. The luminance photocathode sensitivity of the small-size streak tube is 178 μA/lm and the luminance gain is higher than 12 while the luminance gain of picosecond streak tube is only 0.5. Thus, the small-size streak tube has a good weak light detection ability in the field of streak tube imaging lidar.
? 2019, Science Press. All right reserved.
Number of references:14
Main heading:Tubes (components)
Controlled terms:Image resolution - Luminance - Optical radar - Photocathodes - Streak cameras
Uncontrolled terms:Lumiance gain - Screen time - Spatial resolution - Streak tubes - Temporal distortions - Temporal resolution
Classification code:619.1 Pipe, Piping and Pipelines - 714.1 Electron Tubes - 716.2 Radar Systems and Equipment - 742.2 Photographic Equipment
Numerical data indexing:Size 7.00e-02m, Size 8.00e-03m, Time 8.00e-12s
DOI:10.3788/gzxb20194807.0723002
Funding details: Number: 11805276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (No. 11805276), the West Young Scientists Foundation of Chinese Academy of Sciences (No. XAB2017B12).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535032
Title:Optical system design for wide-angle airborne mapping camera with diffractive optical element
Authors:Zhang, Jian (1, 2); Zhao, Liangxiao (2, 3); An, Fei (2); Hao, Sanfeng (2, 3)
Author affiliation:(1) School of Mechano-Electronic Engineering, Xidian University, Xi'an; 710119, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) University of Chinese Academy of Science, Beijing; 10010, China
Corresponding author:Zhao, Liangxiao(454506931@qq.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:With the development of the digital airborne photogrammetry technology, the more performances of the optical system for airborne mapping camera are required, such as the longer focal and the wider field of view (FOV). At the same time, the secondary spectrum correction becomes more important and difficult for the optical system design. A high performance optical system of airborne mapping camera with 200mm focus and 2ω=60° FOV is designed in this paper. The range of work wavelength is from 430nm to 885nm. A two-layer HDOE with negative dispersive characteristic is used to eliminate the secondary spectrum in the process of optical system design. The diffraction efficiency of the designed two-layer HDOE is up to 90%. From the result of design, the MTFs in whole fields are over 0.5 at 90lp/mm, which shows that the system has a great image quality. Meantime, the thermal analysis is done at the temperature range between-20°C and 40°C. As a result, MTF curves of the system at-20°C ~40°C show that a great image quality is kept, which meets the design requirements.
? 2019 SPIE.
Number of references:15
Main heading:Optical systems
Controlled terms:Cameras - Density (optical) - Diffractive optical elements - Image quality - Mapping - Photonics - Systems analysis - Thermoanalysis
Uncontrolled terms:Airborne mapping - Dispersive characteristic - Field of views - Secondary spectrums - Temperature range - Two-layer - Wide angle
Classification code:405.3 Surveying - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 801 Chemistry - 961 Systems Science
Numerical data indexing:Percentage 9.00e+01%, Size 2.00e-01m, Size 4.30e-07m to 8.85e-07m, Temperature 3.13e+02K
DOI:10.1117/12.2520554
Funding details: Number: No.XAB2016A10, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by CAS "Light of West China" Program (No.XAB2016A10) and the Key R & D projects of

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707127793
Title:High-resolution reconstruction of shortwave infrared polarimetric images using the intensity information of visible images
Authors:Liang, Jian (1, 2, 3); Ju, Haijuan (2); Ren, Liyong (2, 4); Zhang, Wenfei (2); Yang, Liming (2); Bai, Zhaofeng (2); Liang, Rongguang (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) Research Department of Information Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) College of Optical Sciences, University of Arizona, 1630 E. University Blvd., Tucson; AZ; 85721, United States; (4) School of Physics and Information Technology, ShaanXi Normal University, Xi'an; 710119, China
Corresponding author:Ren, Liyong(renliy@snnu.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:18
Issue date:2019
Publication year:2019
Pages:4866-4870
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Shortwave infrared (SWIR) polarimetric imaging has been found very effective in various applications. However, the low resolution of the SWIR camera severely limits the capacity of this technique. Image reconstruction methods have been developed to improve the spatial resolution, but these methods typically do not consider the polarized information that the images may contain. In this paper, we propose a high-resolution reconstruction method for SWIR images based on the spatial information of visible images without losing polarized information in the SWIR image. Experimental results demonstrate that this method is feasible to reconstruct high-resolution polarized SWIR images. We have also demonstrated its potential application in image fusion.
? 2019 Optical Society of America.
Number of references:20
Main heading:Image reconstruction
Controlled terms:Image enhancement - Image fusion - Infrared radiation - Polarimeters
Uncontrolled terms:High-resolution reconstruction - Image reconstruction methods - Intensity information - Polarimetric image - Polarimetric imaging - Short wave infrared - Spatial informations - Spatial resolution
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 941.3 Optical Instruments
DOI:10.1364/AO.58.004866
Funding details: Number: 201804910323, Acronym: CSC, Sponsor: China Scholarship Council;Number: XAB2017B20, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. West Light Foundation of the Chinese Academy of Sciences (CAS) (XAB2017B20); China Scholarship Council (CSC) (201804910323); National Natural Science Foundation of China (NSFC) (61505246, 61535015).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607409158
Title:Effect of glass composition on the physical properties and luminescence of Pr3+ ion-doped chalcogenide glasses
Authors:Ma, Chengcheng (1); Guo, Haitao (2); Xu, Yinsheng (1, 2); Wu, Zhihao (1); Li, Mingming (1); Jia, Xiaomeng (1); Nie, Qiuhua (1)
Author affiliation:(1) Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Xu, Yinsheng(xuyinsheng@nbu.edu.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Volume:102
Issue:11
Issue date:November 1, 2019
Publication year:2019
Pages:6794-6801
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:Blackwell Publishing Inc.
Abstract:In this work, Pr3+ ion-doped Ge20Ga15?xSbxSe65 (x = 0, 5, 10, in mol%), Ge20Sb15?yInySe65 (y = 5, 10, in mol%), Ge20Ga15?zInzSe65 (z = 0, 5, 10, in mol%), and Ge20Ga5Sb10Se60I5 glasses were prepared. The structural units, thermal properties, and optical properties of these glasses were analyzed. In addition, a comprehensive comparison study of the effects of metal ions (Sb, Ga, and In), S/Se ratio, and I content on the mid-infrared (MIR) luminescence of Pr3+ ions was conducted. Under a 1.55-μm laser pump, 0.2 mol% of Pr3+ ion-doped chalcogenide glasses performed strong photoluminescence in the wavelength range of 3.5-5.5 μm. Results indicated that the Sb-containing glass performed the strongest emission intensity among the studied glasses. Moreover, halogen element I can reduce the phonon energy of the matrix, which is beneficial to the luminescence of Pr3+ ions and provide significant possibilities for developing MIR lasers and amplifiers.
? 2019 The American Ceramic Society
Number of references:41
Main heading:Glass
Controlled terms:Chalcogenides - Luminescence - Metal ions - Metals - Optical properties - Pumping (laser)
Uncontrolled terms:Chalcogenide glass - Comprehensive comparisons - Emission intensity - Glass compositions - Midinfrared - Phonon energies - Structural unit - Wavelength ranges
Classification code:531.1 Metallurgy - 741.1 Light/Optics - 744.1 Lasers, General - 804.2 Inorganic Compounds - 812.3 Glass
Numerical data indexing:Size 1.55e-06m
DOI:10.1111/jace.16592
Funding text:This work was supported by the Zhejiang Provincial Natural Science Foundation of China (LY18F050004), Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST201705), CAS Interdisciplinary Innovation Team project and National Natural Science Foundation of China (61475189, 61627815), and K.C. Wong Magna Fund in Ningbo University.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607408976
Title:Design and magneto-optical characteristics of Ge–Sb–S–PbI2 chalcogenide glasses with a high Verdet constant
Authors:Xu, Yantao (1, 2); Guo, Haitao (1, 2); Liu, Xiaogang (1); Cui, Jian (1, 2); Xiao, Xusheng (1); Cui, Xiaoxia (1, 2); Guo, Junjiang (1, 2); She, Jiangbo (1, 2); Lu, Min (1); 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, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences (UCAS), Beijing, China
Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Volume:102
Issue:11
Issue date:November 1, 2019
Publication year:2019
Pages:6787-6793
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:Blackwell Publishing Inc.
Abstract:To develop high-performance magneto-optical chalcogenide glasses and clarify the mechanisms of the Verdet constant, a series of GeS2–Sb2S3–PbI2 chalcogenide glasses were designed and fabricated, and their Faraday effects were investigated at a wavelength of 980 nm. A new parameter, that is, average polarizability, was proposed, and the results show that the Verdet constant has a good linear relationship with average polarizability, meaning that the Verdet constant of a chalcogenide glass can be directly estimated by its chemical constituents. The Verdet constant is as large as 0.200 min G?1 cm?1 at 980 nm for 22.5GeS2–67.5Sb2S3–10PbI2 composition glass, which is the largest value reported thus far for sulfide glasses; this glass also possesses good thermal and optical properties and therefore might be an attractive candidate for mid-infrared magneto-optical device applications.
? 2019 The American Ceramic Society
Number of references:26
Main heading:Glass
Controlled terms:Chalcogenides - Germanium compounds - Layered semiconductors - Magnetooptical effects - Optical materials - Optical properties - Polarization - Raman spectroscopy - Sulfur compounds
Uncontrolled terms:Chalcogenide glass - Chemical constituents - Linear relationships - Magneto-optical - New parameters - Optical materials/properties - Polarizabilities - Verdet constant
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 812.3 Glass
DOI:10.1111/jace.16551
Funding details: Number: 61405241, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475189, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was financially supported by the National Natural Science Foundation of China (Grants Nos. 61405241, and 61475189), CAS Interdisciplinary Innovation Team Project.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193307307652
Title:Multi-view object topography measurement with optical sectioning structured illumination microscopy
Authors:Ren, Feifei (1, 2); Wang, Zhaojun (1, 2); Qian, Jia (1, 2); Liang, Yansheng (1); Dang, Shipei (1, 2); Cai, Yanan (1, 2); Bianco, Piero R. (3); Yao, Baoli (1); Lei, Ming (1)
Author affiliation:(1) China 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 Microbiology and Immunology, Department of Biochemistry, Center for Single Molecule Biophysics, 321 Carry Hall, University at Buffalo, Buffalo; NY; 14214, United States
Corresponding author:Lei, Ming(leiming@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:23
Issue date:August 10, 2019
Publication year:2019
Pages:6288-6294
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Various optical instruments have been developed for three-dimensional (3D) surface topography, including the white light interference, reflectance confocal microscopes, and digital holographic microscopes, etc. However, the steep local slope of objects may cause the light to be reflected in a way that it will not be captured by the objective lens because of the finite collection angle of the objective. To solve this "shadow problem," we report a method to enlarge the collection angle range of optical sectioning structured illumination microscopy by capturing sectioned images of the objects from multiple angle of views. We develop a multi-view image fusion algorithm to reconstruct a single 3D image. Using this method, we detect previously invisible details whose slopes are beyond the collection angle of the objective. The proposed approach is useful for height map measurement and quantitative analyses in a variety of fields, such as biology, materials science, microelectronics, etc.
? 2019 Optical Society of America.
Number of references:23
Main heading:Topography
Controlled terms:Image fusion - Lenses - Microelectronics
Uncontrolled terms:Collection angle - Confocal microscopes - Multi-view image - Optical sectioning - Structured illumination microscopy - Three-dimensional (3D) surfaces - Topography measurement - White light interference
Classification code:723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 951 Materials Science
DOI:10.1364/AO.58.006288
Funding details: Number: 11474352, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFC0110100, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61522511, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Key Research and Development Program of China (2017YFC0110100); National Natural Science Foundation of China (11474352, 61522511, 81427802), National Institutes of Health (GM100156).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207289152
Title:An efficient framework for unsupervised feature selection
Authors:Zhang, Han (1); Zhang, Rui (2); Nie, Feiping (1); Li, Xuelong (1)
Author affiliation:(1) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China
Corresponding author:Nie, Feiping(feipingnie@gmail.com)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Issue date:2019
Publication year:2019
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Article in Press
Publisher:Elsevier B.V.
Abstract:In these years, the task of fast unsupervised feature selection attracts much attentions with the increasing number of data collected from the physical world. To speed up the running time of algorithms, the bipartite graph theory has been applied in many large-scale tasks, including fast clustering, fast feature extraction, etc. Inspired by this, we present a novel bipartite graph based fast feature selection approach named Efficient Unsupervised Feature Selection (EUFS). Compared to the existing methods focusing on the same topic, EUFS is advanced in two aspects: (1) we learn a high-quality discrete indicator matrix for these unlabelled data by virtue of bipartite graph based spectral clustering, instead of obtaining an implicit cluster structure matrix; (2) we learn a row-sparse matrix for evaluating features via a generalized uncorrelated regression model supervised by the achieved indicator matrix, which succeeds in exploring the discriminative and uncorrelated features. Correspondingly, the features selected by our model could achieve an excellent clustering or classification performance while maintaining a low computational complexity. Experimentally, the results of EUFS compared to five state-of-the-art algorithms and one baseline on ten benchmark datasets verifies its efficiency and superiority.
? 2019
Number of references:43
Main heading:Feature extraction
Controlled terms:Clustering algorithms - Graph theory - Graphic methods - Matrix algebra - Regression analysis
Uncontrolled terms:Bipartite graphs - Classification performance - Fast feature selections - Indicator matrix - Low computational complexity - Regression model - Uncorrelated features - Unsupervised feature selection
Classification code:903.1 Information Sources and Analysis - 921.1 Algebra - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 922.2 Mathematical Statistics
DOI:10.1016/j.neucom.2019.07.020
Funding details: Number: 2018M643765, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019T120960, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 61751202, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61772427, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871470, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: CX201918, Acronym: NPU, Sponsor: Northwestern Polytechnical University;
Funding text:This work was supported in part by China Postdoctoral Science Foundation under 2018M643765 and 2019T120960, in part by Xi'an Postdoctoral Innovation Base Funding, in part by Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University under CX201918, and in part by National Natural Science Foundation of China under grant numbers 61871470, 61772427, and 61751202.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006603227
Title:Single-image super-resolution reconstruction via generative adversarial network
Authors:Ju, Chunwu (1, 2); Su, Xiuqin (1); Yang, Haoyuan (1, 2); Ning, Hailong (1, 2)
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; 101408, China
Corresponding author:Su, Xiuqin
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10843
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Issue date:2019
Publication year:2019
Article number:108430J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623286
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:145452
Sponsor:Institute of Optics and Electronics (IOE), Chinese Academy of Sciences; The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Single-image super-resolution (SISR) reconstruction is important for image processing, and lots of algorithms based on deep convolutional neural network (CNN) have been proposed in recent years. Although these algorithms have better accuracy and recovery results than traditional methods without CNN, they ignore finer texture details when super-resolving at a large upscaling factor. To solve this problem, in this paper we propose an algorithm based on generative adversarial network for single-image super-resolution restoration at 4x upscaling factors. We decode a restored high-resolution image by the generative network and make the generator output results finer, more realistic texture details by the adversarial network. We performed experiments on the DIV2K dataset and proved that our method has better performance in single image super-resolution reconstruction. The image quality of this reconstruction method is improved at the peak signal-to-noise ratio and structural similarity index and the results have a good visual effect.
? 2019 SPIE.
Number of references:24
Main heading:Image reconstruction
Controlled terms:Deep neural networks - Image enhancement - Image quality - Manufacture - Neural networks - Optical data processing - Optical resolving power - Optoelectronic devices - Restoration - Signal to noise ratio - Textures
Uncontrolled terms:Adversarial networks - Convolutional neural network - High resolution image - Peak signal to noise ratio - Reconstruction method - Single-image super-resolution reconstruction - Structural similarity indices - Super resolution reconstruction
Classification code:537.1 Heat Treatment Processes - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2505809

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192507075788
Title:Observation of dissipative soliton bound states in a nonlinear multimodal interference based all-fiber all-normal-dispersion mode-locking laser
Authors:Lv, Zhiguo (1); Yang, Zhi (1); Song, DongDong (1); Li, Feng (1); Yang, Yang (1); Yang, Xiaojun (1); Wang, Yishan (1); Li, Qianglong (1); Zhao, Wei (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:Lv, Zhiguo(lvzhiguo@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:119
Issue date:November 2019
Publication year:2019
Article number:105626
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:This work, for the first time, demonstrates the generation of the bound soliton states in a nonlinear multimodal interference (NL-MMI) based ytterbium-doped all-normal-dispersion dissipative soliton mode-locking laser. Further, up to the third harmonic mode-locked bound soliton states with rotating phase difference can be generated under the appropriate optimization of the laser cavity parameters. Furthermore, the evolution dynamics and compressibility of the harmonic mode-locked bound soliton states have also been respectively investigated in order to reveal the temporal distribution characteristics of the highly chirped bound soliton states and inter-pulse separation after dispersion compensation.
? 2019 Elsevier Ltd
Number of references:37
Main heading:Mode-locked fiber lasers
Controlled terms:Laser mode locking - Locks (fasteners) - Solitons
Uncontrolled terms:All normal dispersions - Bound soliton - Cavity parameters - Dissipative solitons - Multi-modal - Rotating phase - Temporal distribution - Third harmonic mode
Classification code:744.1 Lasers, General
DOI:10.1016/j.optlastec.2019.105626
Funding details: Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61805274, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The work is supported by the National Natural Science Foundation of China (Grant No. 61805274 and 61690222), Chinese Academy of Science "Light of West China" Program (Grant No. XAB2016B21) and National Key R&D Program of China (Grant No. 2018YFB1108000), Guangdong Key R&D Program (Grant No. 2018B090904003).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806531148
Title:Exploiting spatial relation for fine-grained image classification
Authors:Qi, Lei (1, 2); Lu, Xiaoqiang (1); Li, Xuelong (3)
Author affiliation:(1) The Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) The University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Pattern Recognition
Abbreviated source title:Pattern Recogn.
Volume:91
Issue date:July 2019
Publication year:2019
Pages:47-55
Language:English
ISSN:00313203
CODEN:PTNRA8
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Fine-Grained Image Classification (FGIC) aims to distinguish the images within a subordinate category. Recently, many FGIC methods have been proposed and huge progress has been made in the aspects of part detection and feature learning for FGIC. However, FGIC still remains a challenging task due to the large intra-class variance and small inter-class variance. To classify fine-grained images accurately, this paper proposes to exploit spatial relation to capture more discriminative details for FGIC. The proposed method contains two core modules: part selection module and representation module. The part selection module utilizes intrinsic spatial relation between object parts to select object part pairs with high discrimination power. The representation module exploits the interaction between object parts to describe the selected part pairs and construct a semantic image representation for FGIC. The proposed method is evaluated on CUB-200-2011 and FGVC-Aircraft datasets. Experimental results show that the classification accuracy of the proposed method can reach 85.5% on CUB-200-2011 and 86.9% on FGVC-Aircraft respectively, which exceed comparison methods obviously.
? 2019 Elsevier Ltd
Number of references:54
Main heading:Image classification
Controlled terms:Aircraft - Neural networks - Semantics
Uncontrolled terms:Classification accuracy - Comparison methods - Convolutional neural network - Feature learning - Fine grained - Part selection - Semantic images - Spatial relations
Classification code:652.1 Aircraft, General
Numerical data indexing:Percentage 8.55e+01%, Percentage 8.69e+01%
DOI:10.1016/j.patcog.2019.02.007

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407357360
Title:New algorithm of surface parameter for optical parabolic surface with high-precision
Title of translation:高精度光学抛物面面形参数计算新方法
Authors:Xu, Guangzhou (1); Ruan, Ping (1)
Author affiliation:(1) 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:48
Issue:6
Issue date:June 25, 2019
Publication year:2019
Article number:0617001
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Due to the complexity of calculating model for the current optical parabolic surface and to acquire the high -precision surface based on the data of finite element analysis for parabolic surface, a new high-precision algorithm of surface parameter for optical parabolic surface was proposed. Firstly, the discrete error of the optical parabolic surface was proposed, and elimination technique of discrete error was researched, which was also the crucial step for the data preprocessing of the surface parameter calculation. Secondly, the rigid body displacement and surface distortion displacement were distinguished with the data processing algorithm based on rigid body displacement. Lastly, the basic data to obtain parameter, just as the root mean square, was got using the optimal design algorithm. The algorithm realization of the high-precision parabolic surface parameter was discussed and the validity check of the algorithm was performed as well. The result of validity check demonstrated: the high-precision algorithm of parabolic surface parameter is higher, and the check error is about 6%. The precision of new algorithm can satisfy the engineering requirement, and it also provides a new technical reference for the high precision calculation of optical surface parameter under the external thermal load.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:8
Main heading:Parameter estimation
Controlled terms:Data handling - Errors - Finite element method - Precision engineering - Rigid structures - Thermal Engineering
Uncontrolled terms:Data preprocessing - Data processing algorithms - Elimination techniques - Optimal design algorithms - Parabolic surface - Rigid body displacement - Surface distortion - Surface parameter
Classification code:408 Structural Design - 723.2 Data Processing and Image Processing - 921.6 Numerical Methods
Numerical data indexing:Percentage 6.00e+00%
DOI:10.3788/IRLA201948.0617001

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107262614
Title:Research on 940nm kilowatt high efficiency quasi-continuous diode laser bars
Authors:Zhao, Yuliang (1, 2); Wang, Zhenfu (1); Yang, Guowen (1, 2); Li, Te (1); Song, Yunfei (1); Qi, Luhan (1); Wang, Gang (1, 2); Liu, Yuxian (1, 2); Li, Bo (1, 2); Bai, Shaobo (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:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11170
Part number:1 of 1
Issue title:14th National Conference on Laser Technology and Optoelectronics, LTO 2019
Issue date:2019
Publication year:2019
Article number:1117040
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510630468
Document type:Conference article (CA)
Conference name:14th National Conference on Laser Technology and Optoelectronics, LTO 2019
Conference date:March 17, 2019 - March 20, 2019
Conference location:Shanghai, China
Conference code:149832
Publisher:SPIE
Abstract:High-power GaAs-based semiconductor lasers are the most efficient source of energy for converting electrical into optical power. 940nm diode lasers are used directly or as pump sources for Yb:YAG solid-state lasers, and are widely used in laser cladding and other fields. Improving electro-optic conversion efficiency and reliable output power are urgent requirements for current research hotspots and industrial laser systems. In this paper, we use an asymmetric epitaxial structure of InGaAs/AlGaAs, which reduces the optical loss and resistance, and adopt better cavity surface technology to present 940nm 1-cm quasi-continuous micro-channel cooling (MCC) laser bars. The lasers are tested under a high duty cycle of 9.6% (600us,160Hz) at 25°C with output power of 660.05W, electro-optic conversion efficiency of 64.71% at 600A and slope efficiency of 1.16 W/A. The peak efficiency reaches 72.4%. The increased efficiency results from a lower threshold current and a lower series resistance. Furthermore, the output power of 1025W (1000A) has been confirmed at a duty cycle of 4% (400us,100Hz).
? 2019 SPIE.
Number of references:15
Main heading:Semiconductor lasers
Controlled terms:Conversion efficiency - Electric resistance - Gallium arsenide - High energy lasers - III-V semiconductors - Industrial research - Optoelectronic devices - Pumping (laser) - Semiconducting gallium arsenide - Semiconducting indium gallium arsenide - Semiconductor diodes - Solid state lasers - Yttrium aluminum garnet
Uncontrolled terms:Epitaxial structure - High power - High-efficiency - Series resistances - Slope efficiencies - Source of energy - Structure design - Threshold currents
Classification code:525.5 Energy Conversion Issues - 701.1 Electricity: Basic Concepts and Phenomena - 712.1.2 Compound Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 744 Lasers - 804 Chemical Products Generally - 901.3 Engineering Research
Numerical data indexing:Electric_Current 1.00e+03A, Electric_Current 6.00e+02A, Percentage 6.47e+01%, Percentage 7.24e+01%, Power 6.60e+02W, Size 1.00e-02m, Size 9.40e-07m, Temperature 2.98e+02K
DOI:10.1117/12.2534034

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432482
Title:Optical design of long transmission type ultraviolet detection system
Authors:Wang, Yuming (1, 2); Fan, Xuewu (1); Ni, Dongwei (1, 2); Wang, Lei (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Fan, Xuewu
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083705
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Ultraviolet (UV) detection and imaging technology has developed rapidly in military applications due to its simple environment and clean background. Especially in the ultraviolet communication, UV alarm, UV detection and UV guidance has a unique advantage. A medium telephoto transmission type UV optical system was designed using optical software. This system consisting of two aspheric surfaces and one binary diffractive surface and the other 10 spherical surfaces is adopted to realize the long-wavelength infrared image design parameters: UV operating waveband of 240- 300nm, focal length of 200mm, field of view (FOV) of 24.8 degree, the F number of 2, and total length of 210mm. By optimizing materials and distributing power properly the system characteristics have been greatly improved. After optimization, the MTF is higher than 0.7 at the 20lp/mm and the maximum RMS radius is only about 10 μm, which is much smaller than pixel size of the detector whose pixel size is 13.5μm×13.5μm. The energy concentration in UV CCD receiving surface is greater than 82%. Under the premise that the system meets the UV warning and detection optical properties, the use of aspheric surfaces reduces aberrations, simplifies the structure. This system has high imaging quality and simple structure. In terms of warning, it has good concealment, small size and light weight advantages.
? 2019 SPIE.
Number of references:8
Main heading:Light transmission
Controlled terms:Aspherics - Infrared imaging - Infrared radiation - Manufacture - Military applications - Mirrors - Optical design - Optical properties - Optical systems - Optical testing - Pixels - Telescopes
Uncontrolled terms:Aspheric surfaces - Diffractive surfaces - Energy concentration - Long-wavelength infrared - Simple environments - System characteristics - Ultra violet detection - ultraviolet alarm
Classification code:404.1 Military Engineering - 537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques
Numerical data indexing:Percentage 8.20e+01%, Size 1.00e-05m, Size 2.00e-01m, Size 2.10e-01m, Size 2.40e-07m to 3.00e-07m
DOI:10.1117/12.2504873

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191406723529
Title:Fast design method of smooth freeform lens with an arbitrary aperture for collimated beam shaping
Authors:Mao, Xianglong (1); Li, Jinpeng (1); Wang, Fengbiao (1); Gao, Rong (1); Li, Xing (1); Xie, Yongjun (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Xie, Yongjun(yjxie@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:10
Issue date:April 1, 2019
Publication year:2019
Pages:2512-2521
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A method is presented for the fast design of a smooth freeform lens to tailor a collimated light beam with an arbitrary contour. This method begins by calculating an initial surface based on a simplified ray mapping. Then the surface is fitted by a system of Zernike polynomials, whose weights are treated as the optimization variables for further optimization. In the optimization, the objective function is analytically calculated using a partial differential-equation-based approach. To validate the effectiveness of the proposed method, a freeform lens is designed for a collimated Gaussian beam with a spline contour to form a uniform illumination distribution with another spline contour, which takes only 26 s. A freeform lens is also fabricated and experimented, and its practical performance approaches the design.
? 2019 Optical Society of America.
Number of references:48
Main heading:Gaussian beams
Controlled terms:Molecular physics - Optics
Uncontrolled terms:Collimated beams - Collimated light - Objective functions - Optimization variables - Performance approach - Surface-based - Uniform illumination - Zernike polynomials
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 931.3 Atomic and Molecular Physics
Numerical data indexing:Time 2.60e+01s
DOI:10.1364/AO.58.002512
Funding text:CAS "Light of West China" Program (XAB2016B17, XAB2016B22); Shaanxi Key RD Program (2017KW-028).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907216273
Title:Streaking of Argon L-Shell Auger Emissions with> 250 eV Attosecond X-Ray Pulses
Authors:Han, Seunghwoi (1); Xu, Peng (1); Wang, Yishan (2); Zhao, Kun (3); Chang, Zenghu (1)
Author affiliation:(1) CREOL and Department of Physics, University of Central Florida, Orlando; FL; 32816, United States; (2) CAS, State Key Lab of Transient Optics and Photonics Xi 'An, Institute of Optics and Precision Mechanics, Xi 'an; 710119, China; (3) Institute of Physics, Chinese Academy of Sciences, Beijing; 100190, China
Source title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Issue date:May 2019
Publication year:2019
Article number:8749227
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:2019 Conference on Lasers and Electro-Optics, CLEO 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:149135
Sponsor:AdValue Photonics; American Elements; Class5 Photonics; Coherent; et al.; GoFoton
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We investigate the Argon Auger decay using isolated attosecond X-ray pulses reach the Carbon K-edge. A home-built electron spectrometer resolves and measures lifetimes of L-shell vacancies of Argon in pump-probe experiment.
?2019 The Author(s) 2019 OSA.
Number of references:6
DOI:10.23919/CLEO.2019.8749227

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006930919
Title:Automated fine motor evaluation for developmental coordination disorder
Authors:Li, Ruimin (1, 2, 3); Fu, Hong (3); Zheng, Yang (1, 2, 3); Lo, Wai-Lun (3); Yu, Jane J. (4); Sit, Cindy H. P. (4); Chi, Zheru (5); Song, Zongxi (6); Wen, Desheng (6)
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) Department of Computer Science, Chu Hai College of Higher Education, Hong Kong; 999077, Hong Kong; (4) Department of Sports Science and Physical Education, Chinese University of Hong Kong, Hong Kong; 999077, Hong Kong; (5) Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Hong Kong; 999077, Hong Kong; (6) Xi'An Institute of Optics and Precision Mechanics of CAS, Xia&Lstrok;an, China
Corresponding author:Fu, Hong(hongfu@chuhai.edu.hk)
Source title:IEEE Transactions on Neural Systems and Rehabilitation Engineering
Abbreviated source title:IEEE Trans. Neural Syst. Rehabil. Eng.
Volume:27
Issue:5
Issue date:May 2019
Publication year:2019
Pages:963-973
Article number:8692632
Language:English
ISSN:15344320
CODEN:ITNSB3
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Developmental coordination disorder (DCD) is a type of motor learning difficulty that affects five to six percent of school-Aged children, which may have a negative impact on the life of the sufferers. Timely and objective diagnosis of DCD are important for the success of the intervention. The present evaluation methods of DCD rely heavily on the observational analysis of occupational therapists and physiotherapists, who score the performance when children conduct some designed tasks. However, these methods are expensive, subjective, and are not easy to expand to a larger population. A fine motor evaluation system (FMES) is proposed with two views of cameras to record children's performance, when they carry out three fine motor tasks. Automated algorithms are developed to perform automated scoring of fine motor skill. The automated algorithms include task localization and individual task evaluation. The purpose of task localization is to detect each task and extract segments belonging to each task from the original video that includes multiple segments of different tasks. A convolutional neural network with temporal filtering is used to do frame-wise classification, and a boundary localization algorithm is proposed to localize each task segment. For individual task evaluation, the extracted video segments of task 1 and task 2 are evaluated based on the proposed feature extraction and time positioning algorithm, and the paper drawings of task 3 are evaluated based on image processing. The proposed methods are validated on a diverse population of children with or without DCD by comparing automated scoring with manual scoring from a professional evaluator. The experimental results suggest that the proposed methods can effectively achieve fine motor evaluation for DCD assessment. Besides, our system is a low-cost solution, and the evaluation methods developed are automated, objective, and can be suited for large population evaluation and analysis.
? 2001-2011 IEEE.
Number of references:35
Main heading:Automation
Controlled terms:Image processing - Neural networks
Uncontrolled terms:Developmental coordination disorders - Fine motors - Motion capture - task evaluation - task localization
Classification code:731 Automatic Control Principles and Applications
DOI:10.1109/TNSRE.2019.2911303
Funding text:This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, under Project UGC/FDS13/E02/16

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106968520
Title:A porous Au-Ag hybrid nanoparticle array with broadband absorption and high-density hotspots for stable SERS analysis
Authors:Li, Kuanguo (1, 2); Liu, Guangju (1); Zhang, Sheng (1); Dai, Yanqiu (3); Ghafoor, Sonia (3); Huang, Wanxia (1); Zu, Zewen (1); Lu, Yonghua (3, 4)
Author affiliation:(1) College of Physics and Electronics Information and Anhui Province, Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Wuhu Anhui; 241000, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xian Shanxi; 710068, China; (3) Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei Anhui; 230026, China; (4) Advanced Laser Technology Laboratory of Anhui Province, Hefei Anhui; 230026, China
Corresponding author:Li, Kuanguo(likguo@ahnu.edu.cn)
Source title:Nanoscale
Abbreviated source title:Nanoscale
Volume:11
Issue:19
Issue date:May 21, 2019
Publication year:2019
Pages:9587-9592
Language:English
ISSN:20403364
E-ISSN:20403372
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:Constructing high-density hotspots is of crucial importance in surface enhanced Raman scattering (SERS). In this paper, we present a large-area and broadband porous Au-Ag hybrid nanoparticle array which was fabricated by an ultra-thin alumina mask (UTAM) technique incorporated with annealing and galvanic replacement techniques. Experimental results and numerical simulations demonstrated that the porous Au-Ag hybrid nanoparticle array possessed enormous hotspots for high sensitivity, uniformity, and stability in SERS analysis. A large Raman enhancement factor of 2.2 × 107 was achieved with a relative standard deviation (RSD) of 7.7%, leading to excellent reliability for Raman detection. Furthermore, this novel substrate exhibited a long shelf time in an ambient environment and promising practical applications in many SERS-based quantitative analytical and biomedical sensing techniques.
? 2019 The Royal Society of Chemistry.
Number of references:51
Main heading:Gold alloys
Controlled terms:Alumina - Aluminum oxide - Binary alloys - Nanoparticles - Raman scattering - Silver alloys - Substrates - Surface scattering
Uncontrolled terms:Ambient environment - Broadband absorption - Galvanic replacements - Hybrid nanoparticle - Raman enhancement - Relative standard deviations - Sensing techniques - Surface enhanced Raman Scattering (SERS)
Classification code:547.1 Precious Metals - 741.1 Light/Optics - 761 Nanotechnology - 804.2 Inorganic Compounds - 931 Classical Physics; Quantum Theory; Relativity - 933 Solid State Physics
Numerical data indexing:Percentage 7.70e+00%
DOI:10.1039/c9nr01744e

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432478
Title:Performance comparison between two kinds of variable curvature mirrors: Mathematical analysis, prototype design, experimental demonstration, and application potentials in realizing non-moving element optical zooming
Authors:Zhao, Hui (1); Xie, Xiaopeng (1, 2); Xu, Liang (1); Zou, Gangyi (1); Li, Chuang (1); Fan, Xuewu (1)
Author affiliation:(1) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710019, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108371C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Variable curvature mirror (VCM) is a long-history technique used to correct the defocus and spherical aberrations caused by thermal lens effect in solid-state laser. In recent years, the probability of VCM in realizing non-moving element optical zoom imaging has been paid much attention and how to generate a large enough saggitus variation while still maintaining good enough surface figure accuracy is the research hot topic. In this manuscript, two kinds of VCM has been studied and the advantages of pressurization actuation based VCM having variable mirror thickness has been confirmed. Compared with the traditional annular force actuation based VCM with constant mirror thickness, the pressurization actuation based one having variable mirror thickness is capable of providing a saggitus variation of larger than 35um and still maintaining its surface figure accuracy superior to 1/10λ(λ=632.8nm). Besides that, it is found that spherical aberration plays a main role in leading to the degradation of surface figure accuracy and the surface figure accuracy at extreme curvature could be improved to about 1/40λ(λ=632.8nm) by only removing spherical aberration. Therefore, when applying pressurization actuation based VCM to realize non-moving element optical zooming, the wavefront sensing and subsequent digital correction to eliminate the spherical aberration will become a necessary step.
? 2019 SPIE.
Number of references:21
Main heading:Aberrations
Controlled terms:Aspherics - Image reconstruction - Laser mirrors - Manufacture - Optical testing - Pressurization - Solid state lasers - Spheres - Telescopes
Uncontrolled terms:Experimental demonstrations - Mathematical analysis - Optical zooming - Performance comparison - saggitus variation - Spherical aberrations - Surface figure accuracies - Variable curvature mirror
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.4 Solid State Lasers
DOI:10.1117/12.2504861
Funding details: Number: -, Acronym: -, Sponsor: Chinese Academy of Agricultural Sciences;
Funding text:The research was supported by: (1) Shaanxi New Science and Technology Stars Program. (2) The Western Light Program of Chinese Academy of Science under contract No. XAB2015A09. (3) ’135’ Development Program of Xi’an Institute of Optics and Precision Mechanics of CAS.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190306378929
Title:High stable polarization-insensitive Er-doped Q-switched fiber laser with iron oxide nanoparticles as saturable absorber
Authors:Pang, Lihui (1, 2, 3); Song, Chenghua (1, 2, 3); Lv, Ruidong (4); Chen, Zhendong (4); Liu, Sicong (4); Wu, Rongqian (1, 2, 3); Lv, Yi (1, 2, 3); Liu, Wenjun (5)
Author affiliation:(1) Shaanxi Provincial Center for Regenerative Medicine and Surgical Engineering, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an; 710061, China; (2) Institute of Advanced Surgical Technology and Engineering, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an; 710061, China; (3) National-Local, Joint Engineering Research Center of Precise Surgery & Regenerative Medicine, Xi'an; 710061, China; (4) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China; (5) State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing; 100876, China
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:113
Issue date:May 2019
Publication year:2019
Pages:379-383
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:All fiber Q-switched laser with its advantages of high energy, compact structure and high stability boosted the growing demand in many applications. We synthesized the regular iron oxide nanoparticles (IONP) in size of 12–15 nm via the chemical co-precipitation method. Using the IONP-PVA film as SA, high stable polarization-insensitive Er-doped Q-switched fiber laser was demonstrated. The prepared IONP SA exhibits saturation intensity of 13.44 MW/cm2. The shortest pulse duration was achieved to be 896 ns and the single pulse energy was up to 100 nJ with the maximum pump power of 500 mW. In particular, the polarization controller is unnecessary in our experiments, so the ring cavity can be compacted into a smaller size with 80 dB signal-to-noise ratio for the output pulse sequence. Such a compact, low cost and high stability Q-switched laser maybe expected to have the more extensive application prospect.
? 2019 Elsevier Ltd
Number of references:48
Main heading:Saturable absorbers
Controlled terms:Fiber lasers - Fibers - Iron oxides - Metal nanoparticles - Nanostructured materials - Optical pumping - Polarization - Precipitation (chemical) - Q switched lasers - Q switching - Signal to noise ratio - Synthesis (chemical)
Uncontrolled terms:Application prospect - Chemical coprecipitation method - Iron oxide nanoparticle - Polarization controllers - Polarization-insensitive - Q-switched fiber lasers - Saturation intensity - Single pulse energy
Classification code:716.1 Information Theory and Signal Processing - 744 Lasers - 761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds
Numerical data indexing:Energy 1.00e-07J, Power 5.00e-01W, Surface_Power_Density 1.34e+11W/m2, Time 8.96e-07s, Decibel 8.00e+01dB
DOI:10.1016/j.optlastec.2019.01.011
Funding details: Number: xjj2018268, Acronym: -, Sponsor: Support Program for Longyuan Youth and Fundamental Research Funds for the Universities of Gansu Province;Number: 11875044, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018ZDXM-SF-080, Acronym: -, Sponsor: -;
Funding text:This work are supported by the National Natural Science Foundation of China , China (No. 11875044 ); Shaanxi Provincial Key Research and Development Program , China (No. 2018ZDXM-SF-080 ), and the Fundamental Research Funds for the Central Universities , China (No. xjj2018268 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432471
Title:Manufacturing and testing of surface modified silicon carbide aspheric mirror
Authors:Ding, Jiao Teng (1, 2); Fan, Xue Wu (1); Pang, Zhi Hai (1); Feng, Liang Jie (1); Chen, Qin Fang (1); Ma, Zhen (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Shannxi Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Ding, Jiao Teng(dingjiaoteng@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The manufacturing and testing of a surface modified silicon carbide mirror with a bowl-shaped structure was introduced. The entire process flow includes pre-modification silicon carbide substrate processing, silicon carbide substrate surface modification, and silicon modified layer processing. Firstly, before the modification, the conventional processing method of silicon carbide was used, and the effect of the support form on the figure was eliminated by multiple direction rotation testing.At the same time, the self-aligned compensation cross-test was completed and the accuracy of the aspherical surface coefficient was verified. In addition, the polishing process of the silicon modified layer material was studied, and the optimum process parameters suitable for polishing the silicon modified layer material were found out. Based on the above experiments, the modified optical processing adopts a combination of two kinds of polishing technology: flexible chemical mechanical polishing (FCMP)and ion beam figuring (IBF).The surface roughness and surface finish of silicon modified layer are improved by flexible chemical mechanical polishing technology. The high figure accuracy of silicon modified layer is achieved finally by ion beam figuring technology. Finally, the final result of the mirror after IBF is:the RMS values of the figure and roughness in the Φ450 mm aperture is 0.01λ (λ=632.8 nm) and 0.52 nm. The mirror's processing results fully meet the design specifications.
? 2019 SPIE.
Number of references:7
Main heading:Chemical mechanical polishing
Controlled terms:Chemical modification - Ion beams - Ions - Mirrors - Optical testing - Polishing - Silicon carbide - Substrates - Surface roughness - Surface testing - Telescopes
Uncontrolled terms:Aspherical surface - Bowl-shaped structures - Conventional processing - Design specification - Effect of the support - Ion Beam Figuring - Polishing technology - Silicon carbide substrates
Classification code:604.2 Machining Operations - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 932.1 High Energy Physics
Numerical data indexing:Size 5.20e-10m
DOI:10.1117/12.2504853

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192407043562
Title:A Sparse Constrained Graph Regularized Nonnegative Matrix Factorization Algorithm for Hyperspectral Unmixing
Title of translation:一种稀疏约束的图正则化非负矩阵光谱解混方法
Authors:Gan, Yu-Quan (1, 2); Liu, Wei-Hua (1); Feng, Xiang-Peng (1); Yu, Tao (1); Hu, Bing-Liang (1); Wen, De-Sheng (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:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi
Volume:39
Issue:4
Issue date:April 1, 2019
Publication year:2019
Pages:1118-1127
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The space resolution of hyperspectral image is influenced due to the restriction of sensor platform, which results in more than one material in one pixel. Such kind of pixel is called mixed pixel. The existence of mixed pixels restricts accurate analysis and application of hyperspectral images. Hyperspectralunmixing technique can factorize mixed pixels to pure material signatures (endmembers) and corresponding proportion (abundance), which makes more accurate material signature available. Unmxing is very important to accurate classification and identification, anomaly detection and quantitative analysis for hyperspectral imagery. Based on linear spectral mixing model, this paper develops an endmember and abundance sparse constrained graph regularized nonnegative matrix factorization (EAGLNMF) algorithm for hyperspectral imagery unmixing. The algorithm is based on nonnegative matrix factorization, and integrates graph regularization and both endmember and abundance sparse constraints to the object function. Graph regularization is used to consider the geometrical structure of the hyperspectral image and sparse constraints can demonstrate the inner manifoldstructure. First, the lost function of EAGLNMF is constructed, and VCA-FCLS method is used as initial value. And then, the value of the parameters is set, including weighting matrix of graph regularization, sparse factors for both endmember signature matrix and abundance matrix. At last, the iteration equations for endmember matrix and abundance matrix are both obtained, and stopping criteria is given. The algorithm does not require pure pixel in the hyperspectral image. In fact, there are little pure pixel in real hyperspectral imagerydue to the sensors platform. Thus, EAGLNMF algorithm provides a kind of solution for real hyperspectral imagery. The availability and effect of EAGLNMF are verified by synthetic data via four experiments. The experiments compare EAGLNMF with VCA-FCLS, standard NMF and GLNMF. Two metrics, spectral angle distance (SAD) and abundance angle distance (AAD) are used to compare the four methods. Experiment 1 is total comparison experiment of the four methods. SNR and the number of endmembers are constant, and the value of SAD and AAD are compared. Experiment 2 evaluates the influence of SNR. Different value for SNR and constant value for number of endmembers are given to different runs. Experiment 3 evaluates the influence of number of endmembers. Different value for number of endmembers and constant value for SNR are given to different runs. The experiment result shows that EAGLNMF method obtains more accurate result for both endmebers and abundance. Moreover, experiment 4 evaluates the influence of sparse factor between endmember signature and abundance. The result demonstrates that endmember sparse constraint shows a positive effect to unmixing. And, sparse factor between endmember signature and abundance shows effect to unmixing result. In addition, real AVIRIS hyperspectral image is applied to VCA-FCLS, standard NMF, GLNMF and the proposed EAGLNMF, and compared with the ground truth of USGS, the result shows that EAGLNMF obtains best unmixing result among the four algorithms and the accuracy of the estimated endmembers is good.
? 2019, Peking University Press. All right reserved.
Number of references:32
Main heading:Matrix algebra
Controlled terms:Anomaly detection - Factorization - Graph theory - Image analysis - Iterative methods - Pixels - Remote sensing - Spectroscopy
Uncontrolled terms:Graph regularization - Hyper-spectral imageries - Hyperspectral unmixing - Nonnegative matrix factorization - Sparse constraint
Classification code:921 Mathematics
DOI:10.3964/j.issn.1000-0593(2019)04-1118-10

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106621846
Title:Simultaneous super-resolution reconstruction based on plane array staring remote sensing images
Title of translation:遥感面阵凝视图像并行超分辨重建方法
Authors:Yang, Rui (1, 2); Liu, Zhaohui (1); She, Wenji (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:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:48
Issue:1
Issue date:January 25, 2019
Publication year:2019
Article number:0126002
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:A group of images for one scene can be obtained by plane array staring remote sensing system. So researchers often use multi-frame image super-resolution reconstruction to produce images with higher spatial resolution. However, most of reports regard super-resolution reconstruction as an isolated part ignoring that geometric parameters of imaging system have the ability to optimize the reconstruction model. Therefore, the influence of attitude angle on resolution changes in different directions was analyzed particularly. Meanwhile, the corresponding anisotropic blur estimation was presented to improve the accuracy of discrimination model. Because of the matching parameter as a significant role in super-resolution reconstruction, for improving the accuracy of the matching parameter estimation and decreasing the global initial matching error caused by the system, the algorithm of simultaneously optimizing super-resolution image and matching parameters based on maximum a posteriori estimation was proposed. This method takes advantage of the useful information of imaging system and improve the robustness of matching parameter by synchronous optimizing. The experimental results demonstrate that the method of our paper is better than existed algorithms in detail information and definition observing by eyes. In addition, the mean square error was reduced 0.3 times, and the information entropy was increased 1.2 in average.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:14
Main heading:Image reconstruction
Controlled terms:Image enhancement - Image resolution - Imaging systems - Mean square error - Optical resolving power - Remote sensing
Uncontrolled terms:Discrimination model - Image super-resolution reconstruction - Maximum a posteriori estimation - Multi-frame - Remote sensing images - Remote sensing imaging - Remote sensing system - Super resolution reconstruction
Classification code:741.1 Light/Optics - 746 Imaging Techniques - 922.2 Mathematical Statistics
DOI:10.3788/IRLA201948.0126002

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748648
Title:Effect of refractive index measurement error on immersion grating spectral lines
Authors:Tang, Qian (1, 2, 3); Zhang, Chun Min (1); Zhao, Bao Chang (4)
Author affiliation:(1) Institute of Space Optics, School of Science, Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an; 710049, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (3) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen; 518060, China; (4) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Space Optical Technology Research Department, 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:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:1102328
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:Firstly, the effect of refractive index changes on spectral line spacing is calculated and analyzed. Because refractive index changes with wavelength-variety, theoretically, the 0.5 nm interval should be separated by 5 pixels. The spectral distribution will drift with considering the changes in refractive index. At the same time, the inversed spectral line drift caused by measurement errors(±1×10-3?1/4?±1×10-4?1/4?±1×10-5) are analyzed. The same refractive index error, the effect on long waves is greater than short waves. When the refractive index is positive, the spectral line drifts in the negative direction. When the refractive index is negative, the spectral lines drift in the positive direction, and the positive and negative drift are basically symmetrical. When the accuracy error of refractive index measurement is ±1×10-4, the spectral line drift is 0.7 pixels. When the error increases or decreases by an order of magnitude, the number of drift elements also increases or decreases by the same order of magnitude.
? 2019 SPIE.
Number of references:23
Main heading:Refractive index
Controlled terms:Diffraction gratings - Measurement errors - Pixels - Refractometers - Spectroscopy - Water vapor
Uncontrolled terms:Accuracy errors - Immersion grating - Long waves - Refractive index changes - Refractive index measurement - Short waves - Spectral distribution - Spectral line
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.3 Optical Instruments
Numerical data indexing:Size 5.00e-10m
DOI:10.1117/12.2522019
Funding details: Number: GD201712, Acronym: -, Sponsor: Department of Education of Guangdong Province;Number: 61501361, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (NSFC) (61501361); Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province (GD201712).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106638838
Title:Study on temperature characteristics of triangular prisms ring cavity
Authors:Liu, Jianning (1); Lu, Zheng (2); Ren, Lina (1); Jiao, Mingxing (1); Bian, Xiaoyun (1)
Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi' An University of Technology, Xi'an, Shaanxi; 710048, China; (2) North Jierui Opto-Electronics Technology Ltd, Xi' an, Shaanxi; 710111, China
Corresponding author:Liu, Jianning(liujianning@xaut.edu.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11053
Part number:1 of 1
Issue title:Tenth International Symposium on Precision Engineering Measurements and Instrumentation
Issue date:2019
Publication year:2019
Article number:1105318
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627819
Document type:Conference article (CA)
Conference name:10th International Symposium on Precision Engineering Measurements and Instrumentation, ISPEMI 2018
Conference date:August 8, 2018 - August 10, 2018
Conference location:Kunming, China
Conference code:145754
Sponsor:China Instrument and Control Society (CIS); Chinese Society for Measurement (CSM); International Committee on Measurements and Instrumentation (ICMI); National Natural Science Foundation of China (NSFC)
Publisher:SPIE
Abstract:The refractive indexes of prisms are affected by temperature, hence the optical characteristics of triangular prisms ring cavity is disturbed enough to affect the stability of the laser gyro. Considering the temperature perturbation, the transmission matrices of the reflected and refracted beams on the prism surfaces have been modified. The modified results are the old 2×2 beam transfer matrices are corrected to new 3×3 matrices and the temperature perturbations are added. According to the self-consistent theory of the laser ring cavity, a physical model of the ring cavity light transmission with the temperature disturbance has been established. The theoretical analysis shows that when the temperature varies from -40°C to 70°C, the changes of the optical cavity-length, frequency offset, and scale factor are 49μm, 0.011MHz and 1.96×10-10, respectively. An experimental system of the prism laser gyroscope has been established whose temperature can be changed, and the experimental results agree with the theoretical values.
? 2019 SPIE.
Number of references:12
Main heading:Light transmission
Controlled terms:Frequency allocation - Gyroscopes - Laser theory - Precision engineering - Prisms - Refractive index - Ring lasers - Transfer matrix method
Uncontrolled terms:Experimental system - Optical characteristics - self-consistent theory - Temperature characteristic - Temperature disturbance - Temperature perturbations - Theoretical values - Transmission matrix
Classification code:716.3 Radio Systems and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744 Lasers - 744.1 Lasers, General - 921 Mathematics
Numerical data indexing:Frequency 1.10e+04Hz, Size 4.90e-05m, Temperature 2.33e+02K to 3.43e+02K
DOI:10.1117/12.2509404
Funding text:National Natural Science Foundation of China (NSFC) (61605156); Shaanxi Natural Science Foundation (2016JQ6073); Education Department of Shaanxi Province (16JK1560).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184105910608
Title:Robotic Arm Based Automatic Ultrasound Scanning for Three-Dimensional Imaging
Authors:Huang, Qinghua (1); Lan, Jiulong (2); Li, Xuelong (3)
Author affiliation:(1) School of Mechanical Engineering, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (2) School of Electronic and Information Engineering, South China University of Technology, Guangzhou; 510006, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Huang, Qinghua(enicarwhw@qq.com)
Source title:IEEE Transactions on Industrial Informatics
Abbreviated source title:IEEE Trans. Ind. Inf.
Volume:15
Issue:2
Issue date:February 2019
Publication year:2019
Pages:1173-1182
Article number:8472788
Language:English
ISSN:15513203
Document type:Journal article (JA)
Publisher:IEEE Computer Society
Abstract:This paper presents a human skin inspired automatic robotic ultrasound (US) system for three-dimensional (3-D) imaging. A depth camera was adopted to capture the point cloud of the skin surface. According to the 3-D contour of the skin surface, the scan range and scan path for the US probe could be automatically determined. Then, we used a normal-vector-based method to determine the pose of the robotic arm corresponding to each scan point in the scan path. In addition, two force sensors could feedback the contact force between the scanned tissue and the emission plane of the probe for fine-tuning the pose of the robotic arm. After the scanning, the system could realize 3-D US reconstruction. Experimental results validate the feasibility of the proposed system. It is expected that the proposed system will be useful in clinical practices.
? 2005-2012 IEEE.
Number of references:46
Main heading:Three dimensional displays
Controlled terms:Imaging techniques - Manipulators - Motion planning - Probes - Robot programming - Robotic arms - Robotics - Scanning - Skin - Ultrasonics
Uncontrolled terms:3-D ultrasound - Automatic scanning - Robot kinematics - Robot sensing system - Robotic ultrasounds - Three dimensional (3-D) imaging - Three dimensional imaging - Ultrasound scanning
DOI:10.1109/TII.2018.2871864
Funding details: Number: -, Acronym: NPU, Sponsor: Northwestern Polytechnical University;Number: 2017A030312006, Acronym: -, Sponsor: Natural Science Foundation of Guangdong Province;Number: 201704020134, Acronym: -, Sponsor: Guangzhou Science and Technology Program key projects;Number: 61571193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017MS064, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Manuscript received February 28, 2018; revised June 14, 2018; accepted September 1, 2018. Date of publication September 26, 2018; date of current version February 1, 2019. This work was supported in part by the National Natural Science Foundation of China under Grant 61571193, in part by the Natural Science Foundation of Guangdong Province, China under Grant 2017A030312006 and Grant 2017A030330247, in part by the Fundamental Research Funds for the Central Universities under Grant 2017MS064, and in part by the Science and Technology Program of Guangzhou under Grant 201704020134. Paper no. TII-18-0545. (Corresponding author: Qinghua Huang.) Q. Huang is with the School of Mechanical Engineering and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi’an 710072, China (e-mail:,enicarwhw@qq.com).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190606475242
Title:High energy closed-loop cycle narrow linewidth optically pumped XeF(C-A) blue laser at a repetition rate of 10 Hz
Authors:Shen, Yanlong (1, 2); Zhu, Feng (1); Yu, Li (3); Luan, Kunpeng (1); Tao, Mengmeng (1); Huang, Chao (1); Chen, Hongwei (1); Ma, Lianying (1); Zhao, Liu (1); An, Xiaoxia (1); Yi, Aiping (1); Li, Gaopeng (1)
Author affiliation:(1) State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an Shaanxi; 710024, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an Shaanxi; 710119, China; (3) Institute of Ocean Information Technology, China Electronics Technology Group Corporation, Beijing; 100041, China
Corresponding author:Shen, Yanlong(yanlong_xian@126.com)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:3
Issue date:February 4, 2019
Publication year:2019
Pages:2258-2267
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We report for the first time on a closed-loop cycle narrow linewidth XeF(C-A) blue laser at a repetition rate of up to 10 Hz with each pulse energy of >1 J. A FWHM linewidth of less than 1.5 nm (minimum to 1.1 nm) with a highly stable wavelength centered at 488.3 nm was achieved by employing a polarization-independent custom-designed narrowband optical filter (NBOF) into the cavity. The pulse energy, as well as the repetition rate, to the best of our knowledge, is the highest ever reported in the narrow linewidth XeF(C-A) blue lasers at repetitively-pulsed mode.
? 2019 Optical Society of America
Number of references:33
Main heading:Pulse repetition rate
Controlled terms:Linewidth - Optically pumped lasers - Pulsed lasers - Pumping (laser)
Uncontrolled terms:Energy closed loops - Highly stables - Narrow band optical filters - Narrow-line width - Optically pumped - Polarization independent - Repetition rate - Repetitively pulsed mode
Classification code:744.1 Lasers, General - 931.3 Atomic and Molecular Physics
Numerical data indexing:Frequency 1.00e+01Hz, Size 1.10e-09m, Size 1.50e-09m, Size 4.88e-07m
DOI:10.1364/OE.27.002258
Funding details: Number: SKLLIM1503, Acronym: LTO, SCSIO, CAS, Sponsor: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences;Number: SKLLIM1602Z, Acronym: LTO, SCSIO, CAS, Sponsor: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences;
Funding text:State Key Laboratory of Laser Interaction with Matter; Fund of the State Key Laboratory of Laser Interaction with Matter (SKLLIM1503, SKLLIM1602Z). The authors are very grateful to Yongsheng Zhang from the SKLLIM for fruitful discussions and Jiangtao Zeng from State Key Laboratory of Intense Pulsed Radiation Simulation and Effect for technique support of high-voltage pulse trigger.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106969522
Title:Relationship between angle error and image rotation of Sagnac transverse shearing interferometer
Authors:Chou, Xiao-Quan (1); Jiao, Qiao-Li (1); Sun, Jian (1); Ren, Wen-Zhen (1); Li, Xiao-Yan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 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:11068
Part number:1 of 1
Issue title:Second Symposium on Novel Technology of X-Ray Imaging
Issue date:2019
Publication year:2019
Article number:110680Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510628267
Document type:Conference article (CA)
Conference name:2nd Symposium on Novel Technology of X-Ray Imaging
Conference date:November 26, 2018 - November 28, 2018
Conference location:Hefei, China
Conference code:148066
Sponsor:China Institute of Atomic Energy; Institute of High Energy Physics, Chinese Academy of Sciences; National Synchrotron Radiation Laboratory, University of Science and Technology China; North Night Vision Technology Company Ltd.; Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Publisher:SPIE
Abstract:In order to solve the image rotation in Sagnac transverse shearing interferometer, a model system is built on ray vector tracing and rotation matrix theory, as well as the theoretical imaging orientation and the actual imaging orientation with the angle error are demonstrated. Besides, the relation between the angle error and the rotation of the image body is concluded, which provides a theoretical guidance for optical alignment in Sagnac transverse shearing interferometer. Finally, an optimized optical alignment scheme is provided by the discussion of the angle error in the assembly and system-level loading process, which is also validated by optical alignment instance.
? COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:10
Main heading:Errors
Controlled terms:Alignment - Interferometers - Mirrors - Rotation - Shearing
Uncontrolled terms:Angle errors - Image rotation - Loading process - Optical alignments - Ray vector - Rotation matrices - Shearing interferometer - System levels
Classification code:601.1 Mechanical Devices - 604.1 Metal Cutting - 741.3 Optical Devices and Systems - 931.1 Mechanics - 941.3 Optical Instruments
DOI:10.1117/12.2523884

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192206974767
Title:Broadband photonic RF channelizer based on micro-combs
Authors:Xu, Xingyuan (1); Wu, Jiayang (1); Tan, Mengxi (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3000, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics, CAS, Xi'an, China; (5) INRS -énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10917
Part number:1 of 1
Issue title:Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII
Issue date:2019
Publication year:2019
Article number:1091722
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510624764
Document type:Conference article (CA)
Conference name:Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII 2019
Conference date:February 4, 2019 - February 7, 2019
Conference location:San Francisco, CA, United states
Conference code:148061
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:In this paper, we first employ CMOS-compatible integrated optical combs to demonstrate a broadband RF channelizer. By using an on-chip nonlinear micro-ring resonator, a broadband 200GHz-spacing Kerr comb with a large number of comb lines are generated, providing a record large number of wavelength channels (over 60 in the C- and L- band) as well as over 100GHz potential RF operation bandwidth for RF channelizers with greatly reduced size, potential cost, and complexity. Record-high spectral slice resolution of 124.94 MHz is achieved through an on-chip MRR featuring a high Q factor up to 1.549×106. As a result, broadband channelization of RF frequencies ranging from 1.7 GHz to 19 GHz is experimentally demonstrated, verifying our approach's feasibility and effectiveness towards the realization of broadband RF channelizer with large channel number and high resolution, as well as reduced cost and footprint.
? 2019 SPIE.
Number of references:35
Main heading:Optical resonators
Controlled terms:Cost reduction - Optical signal processing - Q factor measurement - Signal processing - Submillimeter waves - Terahertz waves
Uncontrolled terms:Channel number - CMOS Compatible - High resolution - Microring resonator - Operation bandwidth - Optical frequency combs - Photonic RF channelizer - Wavelength channels
Classification code:711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems - 942.2 Electric Variables Measurements
Numerical data indexing:Frequency 1.00e+11Hz, Frequency 1.25e+08Hz, Frequency 1.70e+09Hz to 1.90e+10Hz
DOI:10.1117/12.2506942
Funding details: Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program (No. DP150104327). RM acknowledges support by Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program. He also acknowledges additional support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program (grant 074-U 01) by the 1000 Talents Sichuan Program.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535061
Title:Road meteorological condition sensor based on multi-wavelength light detection
Authors:Ruan, Chi (1); Wang, Yuntao (1); Ma, Xinxu (1); Kang, Heng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an, Shaanxi; 710119, China
Corresponding author:Ruan, Chi
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110521F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:Road surface meteorological conditions are very important for traffic safety. According to the statistics, the ratio of traffic accidents that occur on icy, wet and dry road surface is about 4.2:1.6:1. A remote road surface meteorological condition sensor based on multi-wavelength light was developed in this paper which could identify the road surface condition including dry, wet, icy and snow, that may be vital for preventing traffic accidents. By using multi-wavelength optical remote sensing technology and near infrared light source, the diffuse reflectance spectrum of road surface can be detected. The four road surface states of dry, wet, ice and snow can be measured with non-contact method, and the thickness of pavement water film can also be measured. Such road sensors were used on G50 highway in Chongqing, China. Experiment results show that the system could meet the requirements well.
? 2019 SPIE.
Number of references:7
Main heading:Roads and streets
Controlled terms:Infrared devices - Light sources - Photonics - Remote sensing - Snow
Uncontrolled terms:Diffuse reflectance spectrum - Meteorological condition - Multi-wavelengths - Near infrared light sources - Noncontact measurements - Noncontact methods - Optical remote sensing - Road surface condition
Classification code:406.2 Roads and Streets - 443.3 Precipitation - 741.1 Light/Optics
DOI:10.1117/12.2522311

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535051
Title:Athermalization optical design of dual-wavelength infrared optical system with double-layer harmonic elements
Authors:Kang, Fuzeng (1, 2); Fan, Yangyu (1); Lv, Guoyun (1); Gao, Yongshen (1); Wang, Hao (2); Li, Yichao (2)
Author affiliation:(1) School of Electonics and Information, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, 17 Xinxi Road, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:A mathematical model of the diffraction efficiency change with the ambient temperature for the double-layer harmonic diffractive elements (HDE) is presented, and its effects are analyzed in this paper. The double-layer HDE structure is investigated and the optimization procedure is based on the equation of diffraction efficiency of the double-layer HDEs. By selecting appropriate design wavelength, the average diffraction efficiency of the system is reaching 99% in working wavelength and working temperature, which improves the image contrast and the image quality significantly. A set of dual-wavelength infrared optical system is designed based on dual-wavelength 320x240 element cooled thermal IR focal plane arrays detector. By introducing double-layer HDEs and aspheric surfaces, the chromatic aberration and the off-axis aberration are well corrected and the system structure is simplified. The system working in the wave band of 3.7~4.8μm and 7.7~9.5μm and with the F number of 2 is consisted of 8 elements and has 100% cold shield efficiency. The image quality evaluating results show that the performance of the dual-wavelength infrared optical system is very well in temperature from-40C° to +60C°.
? 2019 SPIE.
Number of references:10
Main heading:Aberrations
Controlled terms:Cold working - Diffraction efficiency - Efficiency - Image enhancement - Image quality - Optical design - Optical systems - Photonics - Structural design
Uncontrolled terms:Appropriate designs - Aspheric surfaces - Chromatic aberration - Double layers - Harmonic diffractive elements - Infrared optical systems - Optimization procedures - Working temperatures
Classification code:408.1 Structural Design, General - 535.2 Metal Forming - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 913.1 Production Engineering
Numerical data indexing:Percentage 1.00e+02%, Percentage 9.90e+01%
DOI:10.1117/12.2521909

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20182305282407
Title:Thermal Stability Analysis and Experimental Study of a New Type of Grid-Reinforced Carbon Fiber Mirror
Authors:Xu, Liang (1); Ding, Jiaoteng (1); Wang, Yongjie (1); Xie, Yongjie (1); Wu, Xiaoge (1); Ma, Zhen (1)
Author affiliation:(1) Xi’an Institute of Optics&Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710068, China
Corresponding author:Xu, Liang(liangx@opt.ac.cn)
Source title:Applied Composite Materials
Abbreviated source title:Appl Compos Mater
Volume:26
Issue:2
Issue date:April 15, 2019
Publication year:2019
Pages:469-478
Language:English
ISSN:0929189X
E-ISSN:15734897
CODEN:APCMEL
Document type:Journal article (JA)
Publisher:Springer Netherlands
Abstract:Due to low density, high specific stiffness, and low thermal expansion, carbon fiber reinforced plastic (CFRP) is one of potential materials for high precise components. For high precise structures such as reflectors and optical mirrors, usually strict thermal stability required. In order to ensure rigidity and thermal deformation resistance, carbon fiber mirrors are usually designed as a grid-reinforced sandwich structure. In order to improve the thermal stability of carbon fiber mirrors, a new type of grid-reinforced sandwich structure design is proposed. Finite element method was used to analyze the thermal deformations of the carbon fiber mirror without manufacturing error and with manufacturing error. In order to overcome the effect of moisture absorption deformation, thermal deformation test of the carbon fiber mirror was performed in a vacuum tank. The test results verify the reliability of the finite element analysis results. For Φ100mm center aperture of the Φ150mm carbon fiber mirror, the test results show that the thermal stability is about 4 nm/°C, which is enough for optical mirror application, although “grid effect” existed.
? 2018, Springer Science+Business Media B.V., part of Springer Nature.
Number of references:11
Main heading:Fiber reinforced materials
Controlled terms:Carbon fiber reinforced plastics - Deformation - Fiber reinforced plastics - Fibers - Finite element method - Manufacture - Mirrors - Optical testing - Reinforcement - Reliability analysis - Sandwich structures - Stability - Thermal expansion - Thermodynamic stability
Uncontrolled terms:Carbon fiber reinforced plastics (CFRP) - Carbon-fiber mirrors - Grid effects - Grid reinforced - High specific stiffness - Low thermal expansion - Manufacturing errors - Thermal deformation
DOI:10.1007/s10443-018-9705-1

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534737
Title:Modeling and analysis of image rotation for the AIMS solar optical telescope
Authors:Gong, Yinbing (1, 2); Xie, Yongjun (1); Dong, Rongguang (1); Mao, Xianglong (1); Zhang, Tao (2); Xu, Songbo (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Chang'An University, Xi'an; 710064, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105207
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:The AIMS, a solar telescope with a primary mirror of 1m in diameter, is designed with an off-axis Gregorian optical system and an alt-az mounting structure. The image rotation of the AIMS will be produced both due to alt-az mounting and the movement of plane mirrors system during the monitoring of the sun. Therefore, a derotator is planned to correct and compensate the image rotation to make the terminal instruments of the AIMS work properly. The image rotation in astronomical telescopes consists of the object field rotation and the image field rotations. In this paper, the rotation of the object field for the AIMS is presented and calculated. The image field rotation due to the plane mirrors system with the movement of azimuth axis and altitude axis of the AIMS is theoretically determined by using the ray tracing and vector matrix method. The relationships between the image filed rotation and the variation of the azimuth and altitude of the telescope are discussed. This work may be very helpful to evaluate the deroation methods for the AIMS and will provide an important theoretical support for precision control of the derotator to eliminate the image rotation in real time.
? 2019 SPIE.
Number of references:10
Main heading:Rotation
Controlled terms:Mirrors - Mountings - Optical systems - Photonics - Telescopes
Uncontrolled terms:AIMS - Astronomical telescopes - Image rotation - Model and analysis - Mounting structure - Precision control - Solar telescope - Vector matrix
Classification code:601.2 Machine Components - 741.3 Optical Devices and Systems - 931.1 Mechanics
Numerical data indexing:Size 1.00e+00m
DOI:10.1117/12.2520199
Funding details: Number: 11427901, Acronym: -, Sponsor: Chinese Academy of Agricultural Sciences;Number: 11703072, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:The project is funded by National Natural Science Foundation of China(NSFC)(11703072),West Light Foundation of The Chinese Academy of Sciences(XAB2015B29), and NSFC(11427901).The authors would like to thank Dr. Guangqian Liu in Yunnan Observatory of Chinese Academy of Sciences for helpful discussions with image rotation calculation.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706489059
Title:Research on key technology of the optical measurement device used in liquid oxygen tank of carrier rocket
Authors:Wu, Li (1); Qiang, Zihao (1, 2); Li, Yahui (1, 2); Gao, Bo (1); Mei, Chao (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an Shanxi; 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:10839
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Issue date:2019
Publication year:2019
Article number:108391I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623200
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144715
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:For some extreme environment, such as vibration and shock during rocket launching or ultralow temperature in tank of cryogenic propellant, some key technology of the optical measurement device used in liquid oxygen tank of carrier rocket have been researched. In order to obtain a light-weight, high-stiffness and large-heat resistance main board structure for optical measurement device, a thermo-mechanical topology optimization technique is introduced into the main board structure design of optical measurement device for improving the designing quality. Compared with that before the optimization the main board structure reduces weight loses 46.8 percent with the first-order natural frequency above 420 Hz. The numerical results indicate that after adopting the topologic optimization design method, not only the design course is shortened, but also the main board structure weight is effectively reduced, heat resistance is effectively increased and the capability of the main board structure is enhanced. The extreme temperature test results show that the method is effective.
? 2019 SPIE.
Number of references:10
Main heading:Shape optimization
Controlled terms:Cryogenics - Curricula - Heat resistance - Liquefied gases - Manufacture - Numerical methods - Optical data processing - Optical testing - Optical variables measurement - Oxygen - Rockets - Specific heat - Tanks (containers) - Thermal insulation - Topology
Uncontrolled terms:Cryogenic propellant - Extreme temperatures - First order natural frequency - Optical measurement devices - Optimization techniques - Topologic optimizations - Ultra low temperatures - Vibration
Classification code:413.2 Heat Insulating Materials - 537.1 Heat Treatment Processes - 619.2 Tanks - 641.1 Thermodynamics - 644.4 Cryogenics - 654.1 Rockets and Missiles - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 901.2 Education - 921 Mathematics - 941.4 Optical Variables Measurements
Numerical data indexing:Frequency 4.20e+02Hz, Percentage 4.68e+01%
DOI:10.1117/12.2506665

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184205949164
Title:Discrete Spectral Hashing for Efficient Similarity Retrieval
Authors:Hu, Di (1); Nie, Feiping (1); Li, Xuelong (2)
Author affiliation:(1) School of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an; 710072, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding author:Nie, Feiping(feipingnie@gmail.com)
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:28
Issue:3
Issue date:March 2019
Publication year:2019
Pages:1080-1091
Article number:8488514
Language:English
ISSN:10577149
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:To meet the required huge data analysis, organization, and storage demand, the hashing technique has got a lot of attention as it aims to learn an efficient binary representation from the original high-dimensional data. In this paper, we focus on the unsupervised spectral hashing due to its effective manifold embedding. Existing spectral hashing methods mainly suffer from two problems, i.e., the inefficient spectral candidate and intractable binary constraint for spectral analysis. To overcome these two problems, we propose to employ spectral rotation to seek a better spectral solution and adopt the alternating projection algorithm to settle the complex code constraints, which are therefore named as Spectral Hashing with Spectral Rotation and Alternating Discrete Spectral Hashing, respectively. To enjoy the merits of both methods, the spectral rotation technique is finally combined with the original spectral objective, which aims to simultaneously learn better spectral solution and more efficient discrete codes and is called as Discrete Spectral Hashing. Furthermore, the efficient optimization algorithms are also provided, which just take comparable time complexity to existing hashing methods. To evaluate the proposed three methods, extensive comparison experiments and studies are conducted on four large-scale data sets for the image retrieval task, and the noticeable performance beats several state-of-the-art spectral hashing methods on different evaluation metrics.
? 1992-2012 IEEE.
Number of references:38
Main heading:Eigenvalues and eigenfunctions
Controlled terms:Automobile engine manifolds - Binary codes - Clustering algorithms - Codes (symbols) - Digital storage - Laplace equation - Quantization (signal) - Rotation - Spectrum analysis
Uncontrolled terms:Alternating projection algorithm - Binary representations - discrete spectral hashing - High dimensional data - Large-scale datasets - Matrix decomposition - Optimization algorithms - Similarity retrieval
DOI:10.1109/TIP.2018.2875312
Funding details: Number: hdui831@mail.nwpu.edu.cn;, Acronym: NPU, Sponsor: Northwestern Polytechnical University;Number: 2018YFB1107400, Acronym: -, Sponsor: -;Number: 61772427, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61751202, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61761130079, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Manuscript received March 26, 2018; revised July 28, 2018; accepted September 30, 2018. Date of publication October 10, 2018; date of current version October 29, 2018. This work was supported in part by The National Key Research and Development Program of China under Grant 2018YFB1107400, and in part by The National Natural Science Foundation of China under Grant 61761130079, Grant 61772427, and Grant 61751202. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Husrev T. Sencar. (Corresponding author: Feiping Nie.) D. Hu and F. Nie are with the School of Computer Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China (e-mail: hdui831@mail.nwpu.edu.cn; feipingnie@gmail.com).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184706113727
Title:High-performance mid-infrared frequency upconversion in lithium niobate waveguide patterned with metasurfaces
Authors:Chi, Jiao (1, 3); Liu, Hongjun (1, 2); Huang, Nan (1); Wang, Zhaolu (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) University of Chinese Academy of Sciences, Beijing; 100084, China
Corresponding author:Liu, Hongjun(liuhongjun@opt.ac.cn)
Source title:Journal of Physics D: Applied Physics
Abbreviated source title:J Phys D
Volume:52
Issue:3
Issue date:January 16, 2019
Publication year:2019
Article number:035101
Language:English
ISSN:00223727
E-ISSN:13616463
CODEN:JPAPBE
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Mid-infrared detectors which converter the detected mid-infrared light to the near infrared (NIR) or even visible are of significant interest in free-space communication. We demonstrate a high-performance frequency upconversion from 3.4 μm to 1.064 μm pumped by 1.55 μm in gradient metasurface-assisted thin-film lithium niobate waveguide. Based on this new structure of nonlinear waveguide, the phase-matching condition can be free in on-chip frequency conversion and the power of idler can be 24.5 times as high as that of no metasurface waveguide. The efficient upconversion is realized within a wide signal wavelength range from 3.25 μm to 3.50 μm. This study is helpful for obtaining the precise and integrated mid-infrared detectors.
? 2018 IOP Publishing Ltd.
Number of references:27
Main heading:Infrared devices
Controlled terms:Infrared detectors - Lithium - Niobium compounds - Phase matching - Waveguides
Uncontrolled terms:Free-space communication - Frequency up-conversion - Lithium Niobate Waveguide - Metasurface - Mid infrared detectors - Midinfrared - Nonlinear waveguides - Phase matching conditions
Classification code:542.4 Lithium and Alloys - 713 Electronic Circuits - 714.3 Waveguides - 944.7 Radiation Measuring Instruments
Numerical data indexing:Size 1.55e-06m, Size 3.25e-06m to 3.50e-06m, Size 3.40e-06m to 1.06e-06m
DOI:10.1088/1361-6463/aaebe7
Funding details: Number: 61505247, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775234, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11604377, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QNLM2016ORP0111, Acronym: QNLM, Sponsor: Qingdao National Laboratory for Marine Science and Technology;
Funding text:This work was supported by the National Natural Science Foundation of China (Nos. 61505247, 11604377, and 61775234) and Qingdao National Laboratory for Marine Science and Technology (No. QNLM2016ORP0111).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607096793
Title:An Adaptive Stopping Active Contour Model for Image Segmentation
Authors:Niu, Yuefeng (1, 2); Cao, Jianzhong (1); Zhou, Zuofeng (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:Niu, Yuefeng(niuyuefeng@opt.cn)
Source title:Journal of Electrical Engineering and Technology
Abbreviated source title:J. Electr. Eng. Technol.
Volume:14
Issue:1
Issue date:January 30, 2019
Publication year:2019
Pages:445-453
Language:English
ISSN:19750102
E-ISSN:20937423
Document type:Journal article (JA)
Publisher:Korean Institute of Electrical Engineers
Abstract:Active contour models (ACMs) are widely used in image segmentation applications. However, the selection of maximum iterations which controls the convergence of the ACMs is still a challenging problem. In this paper, an adaptive method for choosing the optimal number of iterations based on the local and global intensity fitting energy is proposed, which increases the automaticity of the active contour model. Moreover, the adoption of the reaction diffusion (RD) method instead of the distance regularization term can improve the accuracy and speed of segmentation effectively. Experimental results on synthetic and real images show that the proposed model outperforms other representative models in terms of accuracy and efficiency.
? 2019, The Korean Institute of Electrical Engineers.
Number of references:29
Main heading:Image segmentation
Controlled terms:Diffusion in liquids
Uncontrolled terms:Active contour model - Adaptive methods - Distance regularizations - Optimal number - Reaction diffusion - Real images - Selection of maximum - Stopping methods
DOI:10.1007/s42835-018-00030-8
Funding text:This research is supported by the Youth Science and Technology New Star of Shaanxi Province (no. 2016KJXX-01), and partially supported by the Western Light of the Chinese Academy of Science (no. Y429611213).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706507766
Title:Non-crystalline YVO4 fiber
Authors:Lan, Bijiao (1, 2); Yu, Yongze (1, 2); Xiao, Xusheng (3); Feng, Xu (1, 2); Tang, Junzhou (1, 2); Guo, Haitao (3); Wu, Zhenping (4); Zhou, Shifeng (1, 2)
Author affiliation:(1) State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China; (2) Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special, Optical Fiber Materials and Devices, Guangzhou, China; (3) State Key Laboratory of Transient Optical and Photonics, Chinese Academy of Sciences, Xian Institute Optics and Precision Mechanics, Xian, China; (4) State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Corresponding author:Zhou, Shifeng(zhoushifeng@scut.edu.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Issue date:2019
Publication year:2019
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Article in Press
Publisher:Blackwell Publishing Inc.
Abstract:Yttrium vanadate (YVO4) is recognized as one of the leading candidates in photonics that can support Raman laser operation and host various types of active dopants. However, it is normally used in the form of single crystal. Here, we report the successful fabrication of non-crystalline YVO4 fiber using the melt-in-tube technique for the first time. Benefiting from the prevention of unexpected element diffusion, the fabricated fiber exhibits a perfect core-clad configuration and the core is composed of non-crystalline YVO4. In addition, controllable crystallization of non-crystalline YVO4 fiber can be realized under external field stimulation. Fully and space-selectively crystallized YVO4 fiber can be fabricated based on the heat-treatment and laser irradiation, respectively. The strategy can be potentially applied to various non-crystalline materials, pointing to promising applications in active photonics.
? 2019 The American Ceramic Society
Number of references:30
Main heading:Crystalline materials
Controlled terms:Fibers - Single crystals
Uncontrolled terms:Element diffusion - External fields - Fabricated fibers - Noncrystalline materials - Raman lasers - Yttrium vanadate - YVO4
Classification code:933.1 Crystalline Solids
DOI:10.1111/jace.16350

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183605782652
Title:Locality and structure regularized low rank representation for hyperspectral image classification
Authors:Wang, Qi (1, 2, 3); He, Xiang (1, 2); Li, Xuelong (4)
Author affiliation:(1) School of Computer Science, Northwestern Polytechnical University, Xi'an, Shaanxi; 710072, China; (2) Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an, Shaanxi; 710072, China; (3) Unmanned System Research Institute, Northwestern Polytechnical University, Xi'an, Shaanxi; 710072, China; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Wang, Qi(crabwq@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:2
Issue date:February 2019
Publication year:2019
Pages:911-923
Article number:8447427
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Hyperspectral image (HSI) classification, which aims to assign an accurate label for hyperspectral pixels, has drawn great interest in recent years. Although low-rank representation (LRR) has been used to classify HSI, its ability to segment each class from the whole HSI data has not been exploited fully yet. LRR has a good capacity to capture the underlying low-dimensional subspaces embedded in original data. However, there are still two drawbacks for LRR. First, the LRR does not consider the local geometric structure within data, which makes the local correlation among neighboring data easily ignored. Second, the representation obtained by solving LRR is not discriminative enough to separate different data. In this paper, a novel locality- A nd structure-regularized LRR (LSLRR) model is proposed for HSI classification. To overcome the above-mentioned limitations, we present locality constraint criterion and structure preserving strategy to improve the classical LRR. Specifically, we introduce a new distance metric, which combines both spatial and spectral features, to explore the local similarity of pixels. Thus, the global and local structures of HSI data can be exploited sufficiently. In addition, we propose a structural constraint to make the representation have a near-block-diagonal structure. This helps to determine the final classification labels directly. Extensive experiments have been conducted on three popular HSI data sets. And the experimental results demonstrate that the proposed LSLRR outperforms other state-of-the-art methods.
? 2018 IEEE.
Number of references:46
Main heading:Image classification
Controlled terms:Glossaries - Hyperspectral imaging - Job analysis - Learning systems - Pixels - Spectroscopy - Support vector machines
Uncontrolled terms:Block diagonal - Global and local structures - Kernel - Local geometric structures - Low-dimensional subspace - Low-rank representations - State-of-the-art methods - Task analysis
DOI:10.1109/TGRS.2018.2862899

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006913035
Title:Accurate optical vector network analyzer based on optical double-sideband suppressed carrier modulation
Authors:Dai, Jian (1, 3); Chen, Zenghui (1); Wang, Xiaoyang (2); Ye, Long (1); Zhang, Tian (1); Xu, Kun (1)
Author affiliation:(1) State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing; 100876, China; (2) School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Chen, Zenghui(zhchen1991@126.com)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:447
Issue date:15 September 2019
Publication year:2019
Pages:61-66
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:A high-accuracy optical vector network analysis (OVNA)based on optical suppressed carrier double-sideband (DSB)modulation and the Pound Drever Hall (PDH)technique is proposed and demonstrated. The accurate and stable frequency responses can be achieved by transmitting the optical carrier suppressed DSB modulation signals through the DUT, and then detecting the reflected signals. Compared with the traditional DSB-based OVNA, the measurement accuracy is improved by eliminating the errors caused by the even-order sidebands. Furthermore, the stability of the OVNA system can be kept by using the PDH feedback loop. An experiment is accomplished. The frequency responses of the FP interferometer are achieved with little measurement error induced by high-order sidebands, and no repeated frequency response appears even when the test time reaches up to 30 min. This novel method is simple and accurate, and would be used for charactering the symmetric ultra-high Q optical devices.
? 2019 Elsevier B.V.
Number of references:23
Main heading:Optical signal processing
Controlled terms:Design for testability - Electric network analyzers - Frequency response - Modulation
Uncontrolled terms:Double side-band suppressed carriers - Double sideband modulation - F-p interferometers - Measurement accuracy - Pound-Drever-Hall technique - Repeated frequencies - Vector network analysis - Vector network analyzers
Numerical data indexing:Time 1.80e+03s
DOI:10.1016/j.optcom.2019.04.019
Funding details: Number: 2019GZKF3, Acronym: LOCT, Sponsor: State Key Laboratory of Advanced Optical Communication Systems and Networks.;Number: 61625104, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61705015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61821001, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by National Natural Science Foundation of China (NSFC)(61625104, 61821001, 61705015); The Fundamental Research Funds for the Central Universities, China; the Fund of State Key Laboratory of Information Photonics and Optical Communications, China (BUPT No. IPOC2017ZT01)and Fund of State Key Laboratory of Advanced Optical Communication Systems Networks, China (2019GZKF3).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207298660
Title:A chirped fiber Bragg grating with triple functions for stable wavelength-tunable Yb-doped fiber laser
Authors:Yang, Huiran (1); Li, Wenlei (2); Chen, Guangwei (2)
Author affiliation:(1) School of Science, Xi'an University of Posts and Telecommunications, Xi'an; Shaanxi; 710121, China; (2) Chinese Acad Sci, Xi'an Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xi'an; 710119, China
Corresponding author:Yang, Huiran(hrxpyang@163.com)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:102
Issue date:November 2019
Publication year:2019
Article number:103008
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Chirped fiber Bragg gratings (CFBGs) have been extensively employed as dispersion compensation element in mode-locked fiber lasers. However, multiple functions of CFBG in fiber lasers have not been studied adequately. Here, triple functions of CFBG, dispersion compensation, distributed reflection performance, and stabilizing mode-locked operation, are experimentally investigated. Firstly, the generation of dissipative solitons (DSs) in an all-normal-dispersion Yb-doped fiber laser is reported, while the mode-locked operation is proved to be insufficiently stable. In order to improve performance of the laser, a conventional solitons (CSs) fiber laser is obtained by inserting a CFBG with large anomalous dispersion into the laser cavity. Besides, the distributed reflection performance of CFBG is researched and a wavelength-tunable fiber laser with tuning range of center wavelength from 1033.5 to 1035.5 nm is achieved. It is no doubt that our work opens up venues to create wavelength tunable Yb-doped fiber laser systems with extremely high stability.
? 2019 Elsevier B.V.
Number of references:55
Main heading:Mode-locked fiber lasers
Controlled terms:Dispersion compensation - Fiber Bragg gratings - Fiber lasers - Fibers - Locks (fasteners) - Solitons
Uncontrolled terms:All normal dispersions - Anomalous dispersion - Chirped fiber Bragg grating - Dissipative solitons - Mode locked operations - Mode-locked laser - Wavelength tunable fiber laser - Yb doped fiber laser
Classification code:744.1 Lasers, General - 744.4 Solid State Lasers
Numerical data indexing:Size 1.03e-06m to 1.04e-06m
DOI:10.1016/j.infrared.2019.103008

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607401713
Title:Photoluminescence of Yb3+/Ce3+ co-doped aluminosilicate glasses under ultraviolet irradiation
Authors:Feng, Wei (1, 2); She, Shengfei (1, 2); Wang, Pengfei (1); Liu, Yongsheng (3); Chang, Chang (1, 2); Hou, Chaoqi (1); Li, Weinan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an, 710072, China
Corresponding author:Li, Weinan(liweinan@opt.ac.cn)
Source title:Journal of Non-Crystalline Solids
Abbreviated source title:J Non Cryst Solids
Issue date:2019
Publication year:2019
Article number:119540
Language:English
ISSN:00223093
CODEN:JNCSBJ
Document type:Article in Press
Publisher:Elsevier B.V.
Abstract:The photoluminescence and decay properties of Yb3+/Ce3+ co-doped aluminosilicate glasses were investigated under ultraviolet irradiation. A strong excitation band was ascribed to 4f → 5d transitions of Ce3+ ions. A broad ultraviolet-visible emission band belonged to 5d → 4f transitions of Ce3+ ions and oxygen-deficient centers (ODCs) in the host matrix, and the visible-near infrared emission band was attributed to non-bridging oxygen hole centers. Comparative tests of the core composition were performed. The results showed Yb2O3 and the ODCs played a crucial role on ultraviolet-visible emission band. ODCs rather than Ce3+ ions were responsible for the 1–35 μs lifetime decay of the ultraviolet-visible emission, but had no contribution to the longer decay lifetimes (77.58 μs) for Ce-free Yb3+-doped glasses. A complex schematic energy-level diagram including the electron transfer mechanism such as Ce3+-Yb3+ → Ce4+-Yb2+, the cooperative up- and down-conversion processes was proposed to describe different luminescence mechanisms UV-expose.
? 2019 Elsevier B.V.
Number of references:39
Main heading:Ytterbium compounds
Controlled terms:Aluminosilicates - Electron transitions - Glass - Infrared devices - Ions - Irradiation - Oxygen - Photoluminescence - Radiation effects
Uncontrolled terms:Chelate precursor - Decay life-time - Electron transfer mechanisms - Nonbridging oxygen hole center - Oxygen deficient centers - Photo darkening effects - Radiation-induced - Ultraviolet irradiations
Classification code:741.1 Light/Optics - 804 Chemical Products Generally - 812.3 Glass
Numerical data indexing:Time 7.76e-05s
DOI:10.1016/j.jnoncrysol.2019.119540
Funding details: Number: 2016YFB0303804, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61675229, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775235, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The work is financially supported by National Natural Science Foundation of China (Grant No. 61675229 and No. 61775235) and National Key Research and Development Program of China (2016YFB0303804).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190906560130
Title:Large-scale 3D imaging of insects with natural color
Authors:Qian, Jia (1, 2); Dang, Shipei (1, 2); Wang, Zhaojun (1, 2); Zhou, Xing (1, 2); Dan, Dan (1); Yao, Baoli (1); Tong, Yijie (2, 3); Yang, Haidong (3); Lu, Yuanyuan (2, 3); Chen, Yandong (2, 3); Yang, Xingke (3); Bai, Ming (3); Lei, Ming (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 Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing; 100101, China
Corresponding author:LEI, Ming(leiming@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:4
Issue date:2019
Publication year:2019
Pages:4845-4857
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:High-resolution 3D imaging technology has found a number of applications in many biological fields. However, the existing 3D imaging tools are often too time-consuming to use on large-scale specimens, such as centimeter-sized insects. In addition, most 3D imaging systems discard the natural color information of the specimens. To surmount these limitations, we present a structured illumination-based approach capable of delivering large field-of-view three-dimensional images. With this approach, 580nm lateral resolution fullcolor 3D images and 3D morphological data in the size range of typical insect samples can be obtained. This method provides a promising approach that can be used to support many different types of entomological investigations, including taxonomy, evolution, bionics, developmental biology, functional morphology, paleontology, forestry, etc.
? 2019 Optical Society of America.
Number of references:36
Main heading:Imaging systems
Controlled terms:Biology - Biomimetics
Uncontrolled terms:Biological fields - Developmental biology - Functional morphology - Large field of views - Lateral resolution - Morphological data - Structured illumination - Three dimensional images
Classification code:461.9 Biology - 746 Imaging Techniques
Numerical data indexing:Size 5.80e-07m
DOI:10.1364/OE.27.004845

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907184984
Title:Physarum inspires research beyond biomimetic algorithms: Reply to comments on "Does being multi-headed make you better at solving problems?"
Authors:Gao, Chao (1); Liu, Chen (2); Schenz, Daniel (3); Li, Xuelong (4); Zhang, Zili (1); Jusup, M. (5); Wang, Zhen (6); Beekman, Madeleine (7); Nakagaki, Toshiyuki (3, 8)
Author affiliation:(1) College of Computer and Information Science & College of Software, Southwest University, Chongqing; 400715, China; (2) Center for Ecology and Environmental Sciences, Northwestern Polytechnical University, Xi'an; 710072, China; (3) Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo; 001-0021, Japan; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China; (5) World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Tokyo; 152-8550, Japan; (6) School of Mechanical Engineering & Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (7) School of Life and Environmental Sciences, The University of Sydney, NSW 2006, Australia; (8) Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo; 060-0815, Japan
Corresponding author:Jusup, M.(mjusup@gmail.com)
Source title:Physics of Life Reviews
Abbreviated source title:Phys. Life Rev.
Volume:29
Issue date:July 2019
Publication year:2019
Pages:51-54
Language:English
ISSN:15710645
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:We look at a recent expansion of Physarum research from inspiring biomimetic algorithms to serving as a model organism in the evolutionary study of perception, memory, learning, and decision making.
? 2019 Elsevier B.V.
Number of references:17
DOI:10.1016/j.plrev.2019.07.002

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507370827
Title:Application of Gaussian fitting to the fast search of pulsar periodic
Authors:Xu, Neng (1, 2, 3); Sheng, Lizhi (1); Chen, Chen (1, 3); Li, Yao (1, 3); Su, Tong (1, 3); Zhao, Baosheng (1); Zheng, Wei (4); Liu, Chunliang (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) The 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) Colledge of Aerospace Science and Engineering, National Univesity of Defense Technology, Changsha; 410073, China
Corresponding author:Sheng, Lizhi(lizhi_sheng@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:198
Issue date:December 2019
Publication year:2019
Article number:163253
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:In this paper, we provided a Gaussian fitting method for fast periodic search to improve the accuracy of chi-square method. And this method can be used for the pulse periodic search of X-ray Pulsar. Firstly, we built the fast search model based on the epoch folding procedure by employing the basic principle of the chi-square evaluation. Secondly, we simulated the distribution of chi-square value by applying the pulsar profile to the fast search model, and it is fitting well with the Gaussian function. Finally, the designed experiments indicated that applying Gaussian fitting to chi - square method can significantly improve period search accuracy.
? 2019 Elsevier GmbH
Number of references:19
Main heading:Pulsars
Controlled terms:Electromagnetic wave emission - Gaussian distribution - X rays
Uncontrolled terms:Basic principles - Chi-square values - Designed experiments - Dynamic experiment - Gaussian fitting - Gaussian functions - Period search - X-ray pulsars
Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 711 Electromagnetic Waves - 922.1 Probability Theory - 932.1 High Energy Physics
DOI:10.1016/j.ijleo.2019.163253
Funding text:This study was supported by the Feild Foundation (NO.JZX7Y20190258057601) and the CAS "Light of West China" Program (NO. XAB2018A07).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507359525
Title:Design of a high precision optical galvanometer driver
Authors:Lian, Xuezheng (1); Ma, Zihan (2); Wei, Yu (1); Huang, Wei (1); Xie, Meilin (1, 2); Feng, Xubin (1); Jing, Feng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Abbreviated source title:Proc. IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf., ITAIC
Part number:1 of 1
Issue title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Issue date:May 2019
Publication year:2019
Pages:631-635
Article number:8785886
Language:English
ISBN-13:9781538681787
Document type:Conference article (CA)
Conference name:8th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Conference date:May 24, 2019 - May 26, 2019
Conference location:Chongqing, China
Conference code:150447
Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Chongqing University of Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In Infrared Search and Track System (IRTS), the single frame imaging field of view of the plane array infrared detector is very small, which can not meet the increasing demand for wide field of view applications. The optical galvanometer has a very high cost performance in the application of lowcost and small volume. At the same time, the application is very necessary in terms of improving performance. In this paper, In order to expand its functionality and applicability, a pure analog and high-precision optical galvanometer drive controller is designed, and the current loop, speed loop and position loop are specially processed, which has high reliabili clear image.
? 2019 IEEE.
Number of references:9
Main heading:Artificial intelligence
Uncontrolled terms:High-precision - Imaging fields - Improving performance - Infrared search and track systems - IRST - Position loops - Single frames - Wide field of view
Classification code:723.4 Artificial Intelligence
DOI:10.1109/ITAIC.2019.8785886

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107243616
Title:Hierarchical and Robust Convolutional Neural Network for Very High-Resolution Remote Sensing Object Detection
Authors:Zhang, Yuanlin (1); Yuan, Yuan (2); Feng, Yachuang (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) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an, 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:57
Issue:8
Issue date:August 2019
Publication year:2019
Pages:5535-5548
Article number:8676107
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Object detection is a basic issue of very high-resolution remote sensing images (RSIs) for automatically labeling objects. At present, deep learning has gradually gained the competitive advantage for remote sensing object detection, especially based on convolutional neural networks (CNNs). Most of the existing methods use the global information in the fully connected feature vector and ignore the local information in the convolutional feature cubes. However, the local information can provide spatial information, which is helpful for accurate localization. In addition, there are variable factors, such as rotation and scaling, which affect the object detection accuracy in RSIs. In order to solve these problems, this paper presents a hierarchical robust CNN. First, multiscale convolutional features are extracted to represent the hierarchical spatial semantic information. Second, multiple fully connected layer features are stacked together so as to improve the rotation and scaling robustness. Experiments on two data sets have shown the effectiveness of our method. In addition, a large-scale high-resolution remote sensing object detection data set is established to make up for the current situation that the existing data set is insufficient or too small. The data set is available at https://github.com/CrazyStoneonRoad/TGRS-HRRSD-Dataset.
? 1980-2012 IEEE.
Number of references:61
Main heading:Object detection
Controlled terms:Competition - Convolution - Deep learning - Image enhancement - Neural networks - Object recognition - Remote sensing - Semantics
Uncontrolled terms:Competitive advantage - Convolutional neural network - hierarchical robust CNN (HRCNN) - High resolution remote sensing - Remote sensing images - Spatial informations - Spatial semantics - Very high resolution
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 911.2 Industrial Economics
DOI:10.1109/TGRS.2019.2900302
Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);
Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607088136
Title:Handheld target probe tip center position calibration for target-based vision measurement system
Authors:Ma, Yueyang (1); Zhao, Hong (1); Gu, Feifei (2, 3); Zhang, Chunwei (1); Zhao, Zixin (1); Zhang, Gaopeng (1, 4); Li, Kejia (1)
Author affiliation:(1) State Key Laboratory Manufacturing Systems Engineering, Xi'An Jiaotong University, Xi'an, Shaanxi, China; (2) Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong, China; (3) Chinese University of HongKong, Hong Kong; (4) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Corresponding author:Zhao, Hong(zhaohong@mail.xjtu.edu.cn)
Source title:Measurement Science and Technology
Abbreviated source title:Meas. Sci. Technol.
Volume:30
Issue:6
Issue date:May 13, 2019
Publication year:2019
Article number:065013
Language:English
ISSN:09570233
E-ISSN:13616501
CODEN:MSTCEP
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:The calibration of the handheld target probe tip center position (PTCP) is an essential procedure in a target-based vision measurement system (T-VMS). At present, handheld PTCP calibration methods typically work via the least squares (LS) method, which is easily affected by noise and may generate a sizable error if placed improperly. This paper proposes a regularized total least squares (RTLS) method for handheld target PTCP calibration. Feature points on the handheld target are first subjected to a robust matching strategy, and then positioned precisely by center extraction deviation compensation. Fixed-radius constraint equations derived from the three-dimensional coordinates of feature points are then used to establish an errors in variables (EIV) model of the PTCP. Finally, Tikhonov-regularized and L-curve methods are applied to search for the optimal solution of the EIV model, i.e. the PTCP coordinates. The proposed method was applied in the laboratory and on site to test its accuracy. Practical data demonstrated that it can calibrate the PTCP of a handheld target effectively and with better accuracy.
? 2019 IOP Publishing Ltd.
Number of references:34
Main heading:Least squares approximations
Controlled terms:Calibration - Light pens - Probes
Uncontrolled terms:Calibration method - Constraint equation - Errors-in-variables (EIV) model - Least squares methods - Position calibration - Three dimensional coordinate - Total least squares - Vision measurement
Classification code:722.2 Computer Peripheral Equipment - 921.6 Numerical Methods
DOI:10.1088/1361-6501/ab0c5a

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432452
Title:Review on the new technologies to improve the resolution of spatial optical remote sensor
Authors:Xiang, Meng (1, 2); Li, Chuang (1); Zhao, Yiyi (1); Hu, Bin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Li, Chuang
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Space optical remote sensors play an important role in earth observation, space situation awareness and astronomy exploration. The optical resolution of space remote sensing system is constantly improved. Several new techniques for realizing ultra-high resolution of spatial optical remote sensors are reviewed. The research status and application prospects of these new technologies are discussed, mainly including synthetic aperture optical system, Fourier ptychography and intensity correlation imaging. The critical technical problems of these new technologies in spacebased and ground-based optical remote sensing engineering are summed up.
? 2019 SPIE.
Number of references:38
Main heading:Remote sensing
Controlled terms:Earth (planet) - Manufacture - Mirrors - Motion compensation - Optical correlation - Optical systems - Optical testing - Space optics - Synthetic apertures - Telescopes
Uncontrolled terms:Fourier - Intensity correlation - Optical remote sensing - Optical remote sensors - Space optical remote sensor - Space remote sensing - Space situation awareness - Ultrahigh resolution
Classification code:537.1 Heat Treatment Processes - 716.2 Radar Systems and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2504941

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192507079903
Title:Electrically tunable temporal imaging in a graphene-based waveguide
Authors:Xie, Peng (1, 2, 3, 4); Wen, Yu (5); Wan, Zishen (2, 4); Wang, Xinyu (1, 3); Liu, Jiarui (6); Yang, Wenqiang (1, 3); Li, Xiaofeng (1); Wang, Yishan (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) Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge; 02139, United States; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Engineering and Applied Sciences, Harvard University, Cambridge; 02138, United States; (5) National University of Defence Technology, Changsha; 410073, China; (6) Sun Yat-Sen University, Guangzhou; 510000, China
Source title:Japanese Journal of Applied Physics
Abbreviated source title:Jpn. J. Appl. Phys.
Volume:58
Issue:5
Issue date:2019
Publication year:2019
Article number:050914
Language:English
ISSN:00214922
E-ISSN:13474065
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We propose an electrically tunable temporal imaging system (TIS) based on four-wave mixing in a dispersion engineered graphene-based waveguide, which could realize a magnification factor of 1000× for a signal consisting of two 100-fs-wide pulses separated by 500 fs and a large working bandwidth of about 700 nm. The TIS was analyzed by solving the couple-mode equations in detail. It was demonstrated that the working wavelength range could be tuned via a small disturbed bias voltage applied to the graphene layer without changing the geometric structure of the waveguide. These results provide attractive insights for potential applications in integrated optics and optical communications.
? 2019 The Japan Society of Applied Physics.
Number of references:40
Main heading:Graphene
Controlled terms:Artificial intelligence - Four wave mixing - Optical communication - Waveguides
Uncontrolled terms:Couple mode equation - Electrically tunable - Geometric structure - Graphene layers - Magnification factors - Temporal imaging - Temporal imaging systems - Wavelength ranges
Classification code:714.3 Waveguides - 717.1 Optical Communication Systems - 723.4 Artificial Intelligence - 761 Nanotechnology - 804 Chemical Products Generally
Numerical data indexing:Size 7.00e-07m, Time 5.00e-13s
DOI:10.7567/1347-4065/ab0c52

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192507071490
Title:Label-free detecting oligonucleotide hybridization melting temperature in real-time with a reflectometric interference spectroscopy–based nanosensor system
Authors:Lu, Yao (1); Sun, Dan (1); Wang, Kaige (1); Bai, Xiaohong (2); Zhang, Chen (1); Zhao, Wei (1); Feng, Xiaoqiang (1); Bai, Jintao (1)
Author affiliation:(1) Institute of Photonics & Photon-Technology, National Center for International Research of Photoelectric Technology & Nano-functional Materials, State Key Laboratory of Cultivation Base for Photoelectric Technology and Functional Materials, Key Laboratory of Optoelectronic Technology of Shaanxi Province, Northwest University, Xi'an; 710069, China; (2) Xi'An Institute of Optics & Precision Mechanics, CAS, Xi'an; 710119, China
Corresponding author:Wang, Kaige(wangkg@nwu.edu.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:192
Issue date:September 2019
Publication year:2019
Article number:162903
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:The accurate determination of melting temperature (Tm) of oligonucleotide hybridization is the primary for various biosensors based on the technique of using surface-tethered nucleic acids as probes. In this paper, a new type of nanosensor based on the reflectometric interference spectroscopy (RIFS) was proposed to determine the Tm in real time. A composite solid nanostructure, i.e., a nanoporous anodic alumina film with a 15 nm top layer of gold sputtered on surface, was employed as the substrate of the RIFS-based nanosensor, and a 30 bp oligonucleotide molecule was bond to the inner wall of pores and hybridized, and then its Tm was detected with raising temperature. The experimental data showed that there were obvious signs of dsDNA molecules denatured and melted into ssDNA molecules at 95 ℃, which was highly consistent with the theoretical analysis. The cost-effective RIFS nanosensor has excellent thermal and physicochemical stabilities, higher determination accuracy, and great potential in the field of biomolecule research.
? 2019 Elsevier GmbH
Number of references:42
Main heading:Nanocomposite films
Controlled terms:Alumina - Aluminum oxide - Cost effectiveness - Melting point - Molecules - Nanosensors - Nucleic acids - Oligonucleotides
Uncontrolled terms:Composite solids - Cost effective - Label-free sensing - Nanoporous anodic aluminas - Oligonucleotide hybridization - Physico-chemical stability - Reflectometric interference spectroscopy - Surface tethered
Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 712.1 Semiconducting Materials - 761 Nanotechnology - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 911.2 Industrial Economics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics - 933 Solid State Physics
Numerical data indexing:Size 1.50e-08m
DOI:10.1016/j.ijleo.2019.06.003
Funding details: Number: 14JS106, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 14JS107, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 16JS102, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 61378083, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61405159, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775181, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This Project was supported by the National Natural Science Foundation of China (Grant Nos. 61775181, 61378083, 61405159), the International Cooperation Foundation of the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. 2011DFA12220), the Major Research Plan of National Natural Science Foundation of China (Grant No. 91123030), the Natural Science Foundation of Shaanxi Province of China (Grant No. 14JS106, 14JS107, 16JS102), and Natural Science Basic Research Program of Shaanxi Province-Major Basic Research Project (2016ZDJC-15, S2018-ZC-TD-0061).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007234182
Title:Numerical and Experimental Characterization of Radiation Mode of 45° Tilted Fiber Grating
Authors:Qin, Huabao (1); He, Qinyun (1); Xing, Zhikun (1); Guo, Xi (1); Yan, Zhijun (1); Sun, Qizhen (1); Zhou, Kaiming (2); Wang, Hushan (3); Liu, Deming (1); Zhang, Lin (2)
Author affiliation:(1) School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) Aston Institute of Photonic Technologies, Aston University, Birmingham; B4 7ET, United Kingdom; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding author:Yan, Zhijun(yanzhijun@gmail.com)
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:37
Issue:15
Issue date:August 1, 2019
Publication year:2019
Pages:3777-3783
Article number:8728142
Language:English
ISSN:07338724
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In this paper, we have numerically and experimentally investigated the radiation mode of 45° tilted fiber grating (45° TFG). By introducing the axial distributions into the volume current method, we have established a three-dimensional theoretical model to analyze spatial distributions of the radiation mode of 45° TFG, and measured the radiation mode spatial distributions in experiment. Both numerical and experimental results show that the radiation mode of 45° TFG exhibits an exponential reduction along the fiber axial direction, and a quasi-Gaussian profile along the radial direction of fiber. Additionally, we have also measured the detailed polarization-dependent azimuthal intensity distributions of radiation modes of both s-and p-polarized core modes. The degree of polarization of radiation mode is around 99.886%, which is independent of the length and the polarization extinction ratio of the grating. Moreover, for the first time, we have experimentally observed a very weak p-polarized component existing in the radiation mode, which has matched well with the simulation results.
? 1983-2012 IEEE.
Number of references:31
Main heading:Radiation
Controlled terms:Fiber optics - Fibers - Heat radiation - Polarization - Spatial distribution
Uncontrolled terms:Degree of polarization - Experimental characterization - Exponential distributions - Fiber gratings - Intensity distribution - Polarization extinction ratio - Tilted fiber gratings - Volume current method
Classification code:641.2 Heat Transfer - 741.1.2 Fiber Optics - 921 Mathematics
Numerical data indexing:Percentage 9.99e+01%
DOI:10.1109/JLT.2019.2920680

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432453
Title:Research on methods of enlarging field of view of the synthetic aperture lidar
Authors:Zhao, Yiyi (1); Xue, Bin (1); Ma, Xiaolong (1); He, Yinghong (1); Yan, Xingtao (1); Lv, Juan (1); Xiang, Meng (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, 17 Xinxi Road, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Xiang, Meng
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Synthetic aperture lidar is a new ultra-high resolution optical imaging instrument, but its reception field is very narrow which is subject to the "antenna theory". In this paper, the antenna efficiency theory is used to explain the antenna theory and the method of enlarging the field of view of the synthetic aperture laser radar. Then the increase range of the field angle of the three methods is deduced by heterodyne efficiency simulation. The simulation results show that the focal plane heterodyne detection optical path of the wide-beam local oscillator beam focal plane has the ability to improve the heterodyne efficiency of the edge field of view by reducing the heterodyne efficiency of the central field of view. The focal plane heterodyne detection optical path of the array detector requires the detector whose pixel size less than 3 times Airy spot radius covers the whole field of view, which can increase the maximum 1.83N times compared to the antenna theory. The effective field of the pupil plane heterodyne detection optical path of the array detector has nothing to do with the magnification of the telescope, the pupil diameter, the size of the detector, etc., which can be increased by N times as compared with the antenna theory.
? 2019 SPIE.
Number of references:14
Main heading:Optical heterodyning
Controlled terms:Antennas - Efficiency - Focusing - Heterodyne detection - Laser theory - Manufacture - Mirrors - Optical radar - Optical testing - Synthetic apertures - Telescopes
Uncontrolled terms:Antenna efficiency - Antenna theory - Array detectors - Field of views - Heterodyne efficiency - Local oscillators - Reception fields - Ultrahigh resolution
Classification code:716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 913.1 Production Engineering - 913.4 Manufacturing
Numerical data indexing:Force 1.83e+00N
DOI:10.1117/12.2504949

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5690544
Title:Hierarchical and Robust Convolutional Neural Network for Very High-Resolution Remote Sensing Object Detection
Authors:Zhang, Yuanlin (1); Yuan, Yuan (2); Feng, Yachuang (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) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an, 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:57
Issue:8
Issue date:August 2019
Publication year:2019
Pages:5535-5548
Article number:8676107
Language:English
ISSN:01962892
E-ISSN:15580644
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Object detection is a basic issue of very high-resolution remote sensing images (RSIs) for automatically labeling objects. At present, deep learning has gradually gained the competitive advantage for remote sensing object detection, especially based on convolutional neural networks (CNNs). Most of the existing methods use the global information in the fully connected feature vector and ignore the local information in the convolutional feature cubes. However, the local information can provide spatial information, which is helpful for accurate localization. In addition, there are variable factors, such as rotation and scaling, which affect the object detection accuracy in RSIs. In order to solve these problems, this paper presents a hierarchical robust CNN. First, multiscale convolutional features are extracted to represent the hierarchical spatial semantic information. Second, multiple fully connected layer features are stacked together so as to improve the rotation and scaling robustness. Experiments on two data sets have shown the effectiveness of our method. In addition, a large-scale high-resolution remote sensing object detection data set is established to make up for the current situation that the existing data set is insufficient or too small. The data set is available at https://github.com/CrazyStoneonRoad/TGRS-HRRSD-Dataset.
? 1980-2012 IEEE.
Number of references:61
Controlled terms:artificial neural network - data set - detection method - hierarchical system - machine learning - remote sensing
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2019.2900302
Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190606469790
Title:Hybrid phase-amplitude superoscillation element for nonscanning optical superresolution imaging
Authors:Xie, Qingkun (1, 2); Jiang, Yanru (1, 2); Liang, Jian (1); Qu, Enshi (1); Ren, Liyong (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; 100084, China
Corresponding author:Ren, Liyong(renliy@opt.ac.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:36
Issue:2
Issue date:February 2019
Publication year:2019
Pages:196-201
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In this paper, we report a nonscanning optical superresolution imaging method based on a hybrid phase-amplitude superoscillation element. Using the Chebyshev polynomials as a basis set on the superoscillation waveform, the optimal combination of these, representing the optimal focal -spot in the local field of view, is found by genetic algorithm. Our numerical calculations demonstrate that a subwavelength focal spot with a full width at half-maximum as small as 253 nm is realized, which has more than 30 times improvement in sidelobe suppression ratio, and crucially, a greatly extended needle with continuously shrunken focal spot is yielded, which allows a large imaging tolerance in the axial displacement of the object. We then present our simulated results of the superresolution imaging on sparse point objects and continuous objects, where the practicality and effectiveness of this method are analyzed and discussed in detail.
? 2019 Optical Society of America
Number of references:26
Main heading:Optical resolving power
Controlled terms:Genetic algorithms - Polynomials
Uncontrolled terms:Axial displacements - Chebyshev polynomials - Continuous objects - Numerical calculation - Optical superresolution - Optimal combination - Sidelobe-suppression ratio - Super resolution imaging
Classification code:741.1 Light/Optics - 921.1 Algebra
Numerical data indexing:Size 2.53e-07m
DOI:10.1364/JOSAA.36.000196
Funding text:National Natural Science Foundation of China (NSFC) (61505246, 61535015).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506772810
Title:Preparation and Photoluminescence Properties of Fluorophosphate Glasses with High Efficient White Light Emission
Title of translation:高效氟磷酸盐玻璃白光荧光体制备及发光特性
Authors:Zheng, Jia-Jin (1, 2); Lu, Qiang (1); Zheng, Rui-Lin (1); Zou, Hui (1); Yu, Ke-Han (1); Wei, Wei (1)
Author affiliation:(1) College of Electronic and Optical Engineering, Nanjing University of Posts & Telecommunications, Nanjing; 210023, China; (2) State Key Laboratory of Transient Optics and Photonics of 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:39
Issue:1
Issue date:January 1, 2019
Publication year:2019
Pages:39-44
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A series of Sn2+, Dy3+ and Sn2+-Dy3+ co-doped fluorophosphate glasses (FPGs) for white light emitting phosphor have been prepared by the melt quenching method. Under the UV light excitation, FPG: Sn2+ and FPG:Dy3+ can obtain blue and yellow light, respectively. The emission color of FPG:Sn2+-Dy3+ can be tuned from blue to white color by properly adjusting the concentration of Dy3+ ions under the excitation of 280 nm UV light, which can be attributed to the energy transfer from Sn2+ to Dy3+ ions. The energy transfer mechanism was investigated and analyzed according to the photoluminescence, lifetime decay and CIE chromaticity coordinate. In addition, the FPG:Sn2+fluorophosphate glass shows the highest color rendering index of 94 and the quantum efficiency of 81.3%, and the Sn2+-Dy3+ co-doped fluorophosphate glasses show better white color coordinates. By controlling the concentration of Dy3+, the FPGs can present a white light with a CIE chromaticity coordinate of (0.311, 0.330), which is very close to the equal energy point. The corresponding quantum efficiency and the luminance are 56.3% and 6 706 cd?m-2, respectively. The results of this study demonstrate that the FPGs are promising candidate for commercial white light emitting applications.
? 2019, Peking University Press. All right reserved.
Number of references:15
Main heading:Quantum efficiency
Controlled terms:Color - Energy transfer - Glass - Ions - Phosphors - Photoluminescence - Tin alloys - Tin compounds
Uncontrolled terms:CIE chromaticity - Color rendering index - Energy transfer mechanisms - Fluorophosphate glass - Melt quenching method - Photoluminescence properties - UV-light excitation - White light-emitting
Classification code:546.2 Tin and Alloys - 741.1 Light/Optics - 812.3 Glass - 931.4 Quantum Theory; Quantum Mechanics
Numerical data indexing:Luminance 6.71e+03Cd/m2 to 2.20e+01Cd/m2, Percentage 5.63e+01%, Percentage 8.13e+01%
DOI:10.3964/j.issn.1000-0593(2019)01-0039-06

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106955526
Title:Fabrication and characterization of a polymeric curved compound eye
Authors:Wang, Yuanyuan (1, 2); Shi, Chengyong (1); Liu, Chenyang (1, 2); Yu, Xiaodan (1, 3); Xu, Huangrong (1, 3); Wang, Taisheng (1); Qiao, Yanfeng (1); Yu, Weixing (3)
Author affiliation:(1) State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888, Dongnanhu Road, Changchun, Jinlin, China; (2) University of the Chinese Academy of Sciences, Beijing; 10039, China; (3) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17, Xinxi Road, Xian; 710119, China
Source title:Journal of Micromechanics and Microengineering
Abbreviated source title:J Micromech Microengineering
Volume:29
Issue:5
Issue date:April 4, 2019
Publication year:2019
Article number:055008
Language:English
ISSN:09601317
E-ISSN:13616439
CODEN:JMMIEZ
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Curved compound eyes, i.e. microlens arrays on curved surfaces, are highly desirable for their unique optical properties including wide field of view, tracking of fast moving objects and so on. However, it is technically challenging to fabricate biomimetic gapless microlens arrays. In this work, we report a simple method for fabricating close-packed microlenses in a kind of stretchable polymeric material PDMS on curved surfaces inspired by the vertebrate eyes. The successfully fabricated polymeric curved compound eye consists of more than 6000 close-packed ommatidia with an average diameter of 600 μm for each ommatidium. The ommatidia are located on a convex surface with a diameter of 40 mm and thus a total field of view of about 180 has been obtained. The optical test on ommatidia shows that the NA for each ommatidium is about 0.21 and the imaging result of the whole compound eye is also given. Furthermore, an optical relay system is introduced to integrate with the compound eye to form a biomimetic compound eye camera. The formed camera is shown to have a great potential for a broad range of optical imaging applications, such as surveillance imaging, target detection and tracking, surveying and mapping, collision-free navigation of terrestrial and aerospace vehicles.
? 2019 IOP Publishing Ltd.
Number of references:26
Main heading:Fabrication
Controlled terms:Automobile manufacture - Biomimetics - Cameras - Microlenses - Microoptics - Optical instrument lenses - Optical properties - Polymers - Security systems
Uncontrolled terms:Biomimetic compounds - Compound eye - Fabrication and characterizations - Micro-lens arrays - Optical relay - Surveillance imaging - Target detection and tracking - Wide field of view
Classification code:461.8 Biotechnology - 662.1 Automobiles - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 815.1 Polymeric Materials - 914.1 Accidents and Accident Prevention
Numerical data indexing:Size 4.00e-02m, Size 6.00e-04m
DOI:10.1088/1361-6439/ab0e9f

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207270970
Title:Antimonide-based visible to short wavelength infrared bispectral photodetector
Authors:Guo, Chunyan (1, 2, 4, 6); Ding, Ying (3, 4, 5); Wasige, Edward (4); Jia, Qingxuan (5, 6); Wang, Guowei (5, 6); Xu, Yingqiang (5, 6); Niu, Zhichuan (5, 6); Wang, Tao (1); Tian, Jinshou (1, 7); Wu, Zhaoxin (2, 7)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Chinese Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) Key Laboratory of Photonics Technology for Information, Key Laboratory for Physical Electronics, Devices of the Min. of Educ., Sch. of Electron. and Info. Eng., Xi'an Jiaotong Univ., Xi'an; 710049, China; (3) Institute of Photonics and Photonic Technology, Northwest University, Xi'an; 710069, China; (4) School of Engineering, University of Glasgow, Glasgow; G12 8LT, United Kingdom; (5) State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductor, Chinese Academy of Science, Beijing; 100083, China; (6) College of Material Science and Optoelectronic Technology, University of Chinese, Academy of Science, Beijing; 100049, China; (7) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11031
Part number:1 of 1
Issue title:Integrated Optics: Design, Devices, Systems, and Applications V
Issue date:2019
Publication year:2019
Article number:1103113
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627284
Document type:Conference article (CA)
Conference name:Integrated Optics: Design, Devices, Systems, and Applications V 2019
Conference date:April 1, 2019 - April 3, 2019
Conference location:Prague, Czech republic
Conference code:149830
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:We report cylinder photon traps, prism photon traps, and SiO2/Ta2O5 antireflection films added to the active areas of short wavelength infrared detectors. The total device thickness was estimated ~3.3μm and with the p-i-n structure based on antimonide. The simulation results show that the photon traps increase the absorption of the invisible spectrum distinctly. Also, the optical measurements reveal that maximal responsivity of the detector with PTs array is 0.094A/W in the visible range and 0.64A/W in the short wavelength infrared spectrum. The responsivity in the wavelength of short-wave infrared can be increased apparently as well. Thus, the photon traps array may a potential method for antimonide-based visible to short wavelength infrared bispectral photodetector.
? 2019 SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:21
Main heading:Infrared radiation
Controlled terms:Absorption spectroscopy - Integrated optics - Optical data processing - Optical films - Photodetectors - Photons - Silica
Uncontrolled terms:Antimonides - Antireflection films - Optical measurement - P-i-n structure - Potential methods - Short wave infrared - Short-wavelength infrared - Visible range
Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics
DOI:10.1117/12.2520738
Funding details: Number: -, Acronym: CSC, Sponsor: China Scholarship Council;
Funding text:This work is supported by the National Key Technologies R&D Program of China (Grant: 2018YFA0209104, 2016YFB0402403) and the China Scholarship Council.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707140451
Title:High-dimensional one-way quantum computation operations with on-chip optical d-level cluster states
Authors:Reimer, Christian (1, 2); Kues, Michael (1, 3); Sciara, Stefania (1, 4); Roztocki, Piotr (1); Islam, Mehedi (1); Cortés, Luis Romero (1); Zhang, Yanbing (1); Fischer, Bennet (1); Loranger, Sébastien (5); Kashyap, Raman (5, 6); Cino, Alfonso (4); Chu, Sai T. (7); Little, Brent E. (8); Moss, David J. (9); Caspani, Lucia (10); Munro, William J. (11, 12); Aza?a, José (1); Morandotti, Roberto (1, 13, 14)
Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Blvd. Lionel-Boulet, Varennes; J3X 1S2, Canada; (2) John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge; 02138, United States; (3) School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow; G12 8LT, United Kingdom; (4) Department of Energy, Information Engineering and Mathematical Models, University of Palermo, Palermo, Italy; (5) Engineering Physics Department, Polytechnique Montreal, 2900 Blvd. édouard-Montpetit, Montreal; H3T 1J4, Canada; (6) Electrical Engineering Department, Polytechnique Montreal, 2900 Blvd. édouard-Montpetit, Montreal; H3T 1J4, Canada; (7) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (8) State Key Laboratory of Transient Optics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (9) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (10) Institute of Photonics, Department of Physics, University of Strathclyde, Glasgow; G1 1RD, United Kingdom; (11) NTT Basic Research Laboratories, NTT Research Center for Theoretical Quantum Physics, NTT Corporation, Kanagawa, Japan; (12) National Institute of Informatics, Tokyo, Japan; (13) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China; (14) ITMO University, St. Petersburg, Russia
Corresponding author:Morandotti, Roberto(morandotti@emt.inrs.ca)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Volume:Part F128-CLEO_QELS 2019
Part number:1 of 1
Issue title:CLEO: QELS_Fundamental Science, CLEO_QELS 2019
Issue date:2019
Publication year:2019
Report number:FTh1A.4
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:CLEO: QELS_Fundamental Science, CLEO_QELS 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:141088
Publisher:OSA - The Optical Society
Abstract:We implement on-chip generation of high-dimensional hyper-entangled states in the time- and frequency-domain, and transform them into d-level cluster states using a deterministic controlled phase gate. We then demonstrate measurement-based quantum computing operations and show the state's high tolerance towards noise.
? 2019 The Author(s).
Number of references:7
Main heading:Quantum entanglement
Controlled terms:Frequency domain analysis - Quantum computers
Uncontrolled terms:Controlled phase gate - Entangled state - High-dimensional - Measurement-based - On-chip generation - One-way quantum computation - Quantum Computing - Time and frequency domains
Classification code:722 Computer Systems and Equipment - 921.3 Mathematical Transformations - 931.4 Quantum Theory; Quantum Mechanics
DOI:10.1364/CLEO-QELS.2019.FTh1A.4

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006584451
Title:Microfiber interferometer integrated with Au nanorods for an all-fiber phase shifter and switch
Authors:Yang, Xinghua (1); Long, Qunlong (1); Liu, Zhihai (1, 3); Zhang, Yu (1); Yang, Jun (1); Kong, Depeng (2); Yuan, Libo (1, 4); Oh, Kyunghwan (5)
Author affiliation:(1) Key Laboratory of In-Fiber Integrated Optics, College of Science, Harbin Engineering University, Harbin; 150001, 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) National Demonstration Center for Experimental Physics Education, Harbin Engineering University, Harbin; 150001, China; (4) Photonics Research Center, Guilin University of Electronics Technology, Guilin; 541004, China; (5) Department of Physics, Yonsei University, 50 Yonsei-ro, Seoul; 03722, Korea, Republic of
Corresponding author:Yang, Xinghua(yangxh@hrbeu.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:5
Issue date:March 1, 2019
Publication year:2019
Pages:1092-1095
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:All-fiber integrated phase shifters and optical switches have important applications in photonic devices, such as optical controlling, optical fiber sensing, and signal processing. In this Letter, for the first time to the best of our knowledge, we integrated the photothermal effect of a nanomaterial based on gold nanorods (GNRs) and a microfiber interferometer to realize a compact all-optical fiber phase shifter. GNRs surrounding the microfiber were excited by near-infrared light via the evanescent interaction, subsequently releasing the heat through the photothermal effect. Then, the refractive index around the microfiber was varied to shift the interference dips in a reversible manner. Experimentally, a spectral shift efficiency of 0.16 nm/mW near the wavelength of 1550 nm was obtained using an excitation laser at the wavelength of 808 nm. The device also provided an all-optical switching with the modulation depth of 76.4%. The proposed GNR-based all-fiber device can provide high potentials in all-optical signal control applications.
? 2019 Optical Society of America.
Number of references:16
Main heading:Optical switches
Controlled terms:Infrared devices - Interferometers - Laser excitation - Microfibers - Nanoribbons - Nanorods - Optical fibers - Optical signal processing - Phase shifters - Photonic devices - Refractive index
Uncontrolled terms:All-fiber devices - All-optical switching - Excitation lasers - Gold nanorods (GNRs) - Near infrared light - Optical controlling - Optical fiber sensing - Photothermal effects
Classification code:713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 741 Light, Optics and Optical Devices - 744.9 Laser Applications - 761 Nanotechnology - 941.3 Optical Instruments
Numerical data indexing:Percentage 7.64e+01%, Size 1.55e-06m, Size 8.08e-07m
DOI:10.1364/OL.44.001092
Funding details: Number: 11574061, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61227013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61290314, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61307005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61535004, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: F201405, Acronym: -, Sponsor: Natural Science Foundation of Heilongjiang Province;Number: U1231201, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (11574061, 61290314, 61535004, 61307005, 61227013, U1231201), Natural Science Foundation of Heilongjiang Province (F201405); Fundamental Research Funds for the Central Universities.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506771926
Title:Large-scale and uniform Raman substrate of coupled Ag grating with Ag triangle arrays
Authors:Li, Kuanguo (1, 2); Liu, Guangju (1); Ghafoor, Sonia (3); Dai, Yanqiu (3); Huang, Wanxia (1); Zhang, Fabao (1); Lu, Yonghua (3)
Author affiliation:(1) College of Physics and Electronics Information, Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Wuhu, Anhui; 241000, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xian, Shanxi; 710068, China; (3) Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui; 230026, China
Corresponding author:Li, Kuanguo(likguo@ahnu.edu.cn)
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:21
Issue:3
Issue date:February 14, 2019
Publication year:2019
Article number:035005
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Vertically coupled plasmonic structures have been widely used in optical applications due to its enhanced electromagnetic fields in the gaps between metallic nanostructures. In this paper, a large-scale vertically coupled structure composed of the Ag triangle array (AgTA) on Ag grating separated by a nanometric dielectric layer is fabricated by nanosphere lithography incorporated with photolithography. Thanks to the effective surface plasmon polaritons excitation on the Ag grating, a significant surface enhanced Raman spectroscopy (SERS) effect arises from a strongly enhanced local electric field within the tiny gaps between the AgTA and Ag grating, which is verified by experiment and theoretical simulations. The as-proposed SERS substrate exhibits a nice uniformity with the relative standard deviation of about 10.5%, leading to excellent reliability for Raman detection. The simple fabrication of the large-area, productive, and inexpensive vertically coupled plasmonic structure can be a potential candidate for SERS applications.
? 2019 IOP Publishing Ltd.
Number of references:31
Main heading:Substrates
Controlled terms:Electric excitation - Electric fields - Electromagnetic fields - Electromagnetic wave polarization - Nanospheres - Plasmonics - Raman scattering - Raman spectroscopy - Surface plasmons - Surface scattering
Uncontrolled terms:Nano Sphere Lithography - Nanometric dielectric layers - Plasmonic interactions - Relative standard deviations - Surface enhanced Raman Scattering (SERS) - Surface plasmon polaritons - Theoretical simulation - Vertically coupled structures
Classification code:701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 741.1 Light/Optics - 761 Nanotechnology - 931 Classical Physics; Quantum Theory; Relativity - 933 Solid State Physics
Numerical data indexing:Percentage 1.05e+01%
DOI:10.1088/2040-8986/ab0273
Funding details: Number: 11574293, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11674303, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61377053, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China (11674303, 61377053, 11574293), the Natural Science Foundation of Anhui Province (1808085MA22), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST201706), the Natural Science Foundation of the Anhui Higher Education Institutions (KJ2018A0310).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190906561908
Title:Target detection of hyperspectral image based on spectral saliency
Authors:Zhang, Xiaorong (1, 2, 3); Pan, Zhibin (1); Hu, Bingliang (3); Zheng, Xi (4); Liu, Weihua (3)
Author affiliation:(1) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) University of Chinese Academy of Sciences, Beijing; 100039, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (4) Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China
Corresponding author:Zhang, Xiaorong(zhangxiaorong@opt.ac.cn)
Source title:IET Image Processing
Abbreviated source title:IET Image Proc.
Volume:13
Issue:2
Issue date:February 7, 2019
Publication year:2019
Pages:316-322
Language:English
ISSN:17519659
Document type:Journal article (JA)
Publisher:Institution of Engineering and Technology
Abstract:Target detection of hyperspectral image (HSI) is a research hotspot in the field of remote sensing. It is of particular importance in many domains, especially in military application. Unsupervised target detection is usually more difficult because there is no prior information about target. Traditional algorithms exploit spectral information, only. This study introduces the idea of saliency detection from the visual technique into HSI processing domain and proposes a novel approach named spectral saliency target detection (SSD). It establishes a novel salient model, which utilises both spatial saliency and spectral saliency. In the framework of SSD, it combines the model with spectral matching algorithm to make it perform well even in situations where the target is concealed and small. A HSI set comprised of eight different scenes with complex background is setup to evaluate the performance of the proposed algorithm. The final visible detection results demonstrate that the SSD algorithm outperforms the others. The receiver operation characteristic (ROC) curve and area under the ROC curve are applied to evaluate the results. The proposed algorithm shows superior and stable performance.
? The Institution of Engineering and Technology 2018.
Number of references:39
Main heading:Radar target recognition
Controlled terms:Remote sensing - Spectroscopy
Uncontrolled terms:Area under the ROC curve - Complex background - Receiver operation characteristic curves - Saliency detection - Spatial saliencies - Spectral information - Spectral matching algorithms - Stable performance
Classification code:716.2 Radar Systems and Equipment
DOI:10.1049/iet-ipr.2017.1173
Funding text:This work was supported in part by the West Light Foundation of the Chinese Academy of Sciences (XAB2016B20).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006584447
Title:Purely Kerr nonlinear model admitting flat-top solitons
Authors:Zeng, Liangwei (1, 2); Zeng, Jianhua (1, 2); Kartashov, Yaroslav V. (3); Malomed, Boris A. (4, 5)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100084, China; (3) Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow; 108840, Russia; (4) Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv; 69978, Israel; (5) ITMO University, St. Petersburg; 197101, Russia
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:44
Issue:5
Issue date:March 1, 2019
Publication year:2019
Pages:1206-1209
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We elaborate one- and two-dimensional (1D and 2D) models of media with self-repulsive cubic nonlinearity, whose local strength is subject to spatial modulation that admits the existence of flat-top solitons of various types, including fundamental ones, 1D multipoles, and 2D vortices. Previously, solitons of this type were only produced by models with competing nonlinearities. The present setting may be implemented in optics and Bose–Einstein condensates. The 1D version gives rise to an exact analytical solution for stable flat-top solitons, and generic families may be predicted by means of the Thomas–Fermi approximation. Stability of the obtained flat-top solitons is analyzed by means of the linear-stability analysis and direct simulations. Fundamental solitons and 1D multipoles with k 1 and 2 nodes, as well as vortices with winding number m 1, are completely stable. For multipoles with k ≥ 3 and vortices with m ≥ 2, alternating stripes of stability and instability are identified in their parameter spaces.
? 2019 Optical Society of America
Number of references:41
Main heading:Solitons
Controlled terms:Linear stability analysis - Vortex flow
Uncontrolled terms:Competing nonlinearities - Cubic nonlinearities - Einstein condensate - Exact analytical solutions - Fermi approximation - Fundamental solitons - Spatial modulations - Stability and instability
Classification code:631.1 Fluid Flow, General - 921 Mathematics
DOI:10.1364/OL.44.001206

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706490483
Title:Measurement matrix construction for large-area single photon compressive imaging????(Open Access)
Authors:Wang, Hui (1); Yan, Qiurong (1, 2); Li, Bing (1); Yuan, Chenglong (1); Wang, Yuhao (1)
Author affiliation:(1) School of Information Engineering, Nanchang University, Nanchang; 330031, 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:Yan, Qiurong(yanqiurong@ncu.edu.cn)
Source title:Sensors (Switzerland)
Abbreviated source title:Sensors
Volume:19
Issue:3
Issue date:February 1, 2019
Publication year:2019
Article number:474
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI AG, Postfach, Basel, CH-4005, Switzerland
Abstract:We have developed a single photon compressive imaging system based on single photon counting technology and compressed sensing theory, using a photomultiplier tube (PMT) photon counting head as the bucket detector. This system can realize ultra-weak light imaging with the imaging area up to the entire digital micromirror device (DMD) working region. The measurement matrix in this system is required to be binary due to the two working states of the micromirror corresponding to two controlled elements. And it has a great impact on the performance of the imaging system, because it involves modulation of the optical signal and image reconstruction. Three kinds of binary matrix including sparse binary random matrix, m sequence matrix and true random number matrix are constructed. The properties of these matrices are analyzed theoretically with the uncertainty principle. The parameters of measurement matrix including sparsity ratio, compressive sampling ratio and reconstruction time are verified in the experimental system. The experimental results show that, the increase of sparsity ratio and compressive sampling ratio can improve the reconstruction quality. However, when the increase is up to a certain value, the reconstruction quality tends to be saturated. Compared to the other two types of measurement matrices, the m sequence matrix has better performance in image reconstruction.
? 2019 by the authors. Licensee MDPI, Basel, Switzerland.
Number of references:46
Main heading:Particle beams
Controlled terms:Binary sequences - Compressed sensing - Image reconstruction - Imaging systems - Photomultipliers - Photons - Uncertainty analysis
Uncontrolled terms:Compressive imaging - Compressive sampling - Digital micro-mirror device - Measurement matrix - Photomultiplier tube - Reconstruction quality - Single photon counting - Uncertainty principles
Classification code:714.1 Electron Tubes - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 746 Imaging Techniques - 922.1 Probability Theory - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
DOI:10.3390/s19030474
Funding details: Number: 2015T80691, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 61565012, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by National Natural Science Foundation of China (No. 61565012), China Postdoctoral Science Foundation (No. 2015T80691), the Science and Technology Plan Project of Jiangxi Province (No. 20151BBE50092), and the Funding Scheme to Outstanding Young Talents of Jiangxi Province (No. 20171BCB23007).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506749136
Title:Generation of coexisting high-energy pulses in a mode-locked all-fiber laser with a nonlinear multimodal interference technique
Authors:Chen, Guangwei (1, 2); Li, Wenlei (1, 2); Wang, Guomei (1, 2); Zhang, Wenfu (1, 2); Zeng, Chao (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 (UCAS), Beijing; 100049, China
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:7
Issue:2
Issue date:February 1, 2019
Publication year:2019
Pages:187-192
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We demonstrate a passively mode-locked all-fiber laser incorporating a piece of graded-index multimode fiber as a mode-locking modulator based on a nonlinear multimodal interference technique, which generates two types of coexisting high-energy ultrashort pulses [i.e., the conventional soliton (CS) and the stretched pulse (SP)]. The CS with pulse energy as high as 0.38 nJ is obtained at the pump level of 130 mW. When the pump increases to 175 mW, the high-energy SP occurs at a suitable nonlinear phase bias and its pulse energy can reach 4 nJ at a 610 mW pump. The pulse durations of the generated CS and SP are 2.3 ps and 387 fs, respectively. The theory of nonlinear fiber optics, single-shot spectral measurement by the dispersive Fourier-transform technique, and simulation methods based on the Ginzburg–Landau equation are provided to characterize the laser physics and reveal the underlying principles of the generated CS and SP. A rogue wave, observed between the CS and SP regions, mirrors the laser physics behind the dynamics of generating a high-energy SP from a CS. The proposed all-fiber laser is versatile, cost-effective and easy to integrate, which provides a promising solution for high-energy pulse generation.
? 2019 Chinese Laser Press.
Number of references:39
Main heading:Mode-locked fiber lasers
Controlled terms:Cost effectiveness - Fiber lasers - Fibers - Laser mirrors - Laser theory - Mathematical transformations - Multimode fibers - Nonlinear equations - Optical pumping - Passive mode locking
Uncontrolled terms:Dispersive Fourier transforms - Graded-Index Multimode fibers - High energy pulse - High energy ultrashort pulse - Nonlinear Fiber-Optics - Passively mode-locked - Spectral measurement - Underlying principles
Classification code:741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 744 Lasers - 911.2 Industrial Economics - 921.3 Mathematical Transformations
Numerical data indexing:Energy 3.80e-10J, Energy 4.00e-09J, Power 1.30e-01W, Power 1.75e-01W, Power 6.10e-01W, Time 2.30e-12s, Time 3.87e-13s
DOI:10.1364/PRJ.7.000187
Funding details: Number: 61475188, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61805277, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2017A09, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:National Natural Science Foundation of China (NSFC) (61475188, 61635013, 61805277); Chinese Academy of Sciences (CAS) Strategic Priority Research Program and Light of West China Program (XDB24030600, XAB2017A09).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006917665
Title:Microcomb-Based Photonic Local Oscillator for Broadband Microwave Frequency Conversion
Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (5) INRS-énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Source title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.
Part number:1 of 1
Issue title:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019 - Proceedings
Issue date:April 22, 2019
Publication year:2019
Article number:8696278
Language:English
ISBN-13:9781943580538
Document type:Conference article (CA)
Conference name:2019 Optical Fiber Communications Conference and Exhibition, OFC 2019
Conference date:March 3, 2019 - March 7, 2019
Conference location:San Diego, CA, United states
Conference code:147617
Sponsor:3M Science Applied to Life; AC Photonics, Inc.; Acacia Communications, Inc.; AIM Photonics; Alibaba Group; et al.
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We report a broadband microwave mixer based on an integrated micro-comb source, with a photonic local oscillator at 48.9 GHz, a conversion efficiency of -6.8 dB and a spurious suppression ratio of over 43.5 dB.
? 2019 OSA.
Number of references:13
Main heading:Optical fiber communication
Controlled terms:Microwave oscillators - Mixer circuits - Optical fibers
Uncontrolled terms:Comb source - Microwave mixers - Photonic local oscillator - Spurious suppressions
Classification code:713.2 Oscillators - 713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 717.1 Optical Communication Systems - 741.1.2 Fiber Optics
Numerical data indexing:Decibel -6.80e+00dB, Decibel 4.35e+01dB, Frequency 4.89e+10Hz

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106637393
Title:Thermal hydraulic performance of a microchannel heat sink for cooling a high-power diode laser bar
Authors:Wu, Di-Hai (1, 2, 3); Zah, Chung-En (2); Liu, Xingsheng (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi’an High-Tech Zone, Xi’an, Shaanxi; 710119, China; (2) Focuslight Technologies Inc., No. 56 Zhangba 6th Road, Xi’an High-Tech Zone, Xi’an, Shaanxi; 710077, China; (3) Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District, Beijing; 100049, China
Corresponding author:Liu, Xingsheng(liuxs@focuslight.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:8
Issue date:2019
Publication year:2019
Pages:1966-1977
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Numerical and analytical methods are employed to investigate the thermal and fluid flow performance of a microchannel heat sink for cooling a high-power diode laser bar. Heat transfer characteristics and pressure drop in the microchannel under different flow rates are studied. A thermal resistance network, which is proved to have less than 5.4% error, is proposed to characterize the resistance components for the microchannel heat sink. Both numerical modeling and thermal resistance network analysis are verified by experimental results based on the wavelength shift method. Two new heat sinks with more uniform temperature distribution for laser emitters compared with the existing design are presented, and their performance is validated by numerical modeling and spatially resolved spectrum measurements.
? 2019 Optical Society of America
Number of references:49
Main heading:Heat resistance
Controlled terms:Flow of fluids - Heat sinks - Heat transfer - Laser beam welding - Microchannels - Numerical methods - Numerical models - Power semiconductor diodes - Semiconductor lasers
Uncontrolled terms:Analytical method - Heat transfer characteristics - High power diode laser - Micro channel heat sinks - Spatially resolved - Spectrum measurement - Thermal resistance networks - Thermal-hydraulic performance
Classification code:616.1 Heat Exchange Equipment and Components - 631.1 Fluid Flow, General - 641.2 Heat Transfer - 744.4.1 Semiconductor Lasers - 744.9 Laser Applications - 921 Mathematics - 921.6 Numerical Methods
Numerical data indexing:Percentage 5.40e+00%
DOI:10.1364/AO.58.001966
Funding details: Number: 61334010, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61334010); National Key R&D Program of China (2018YFB1107302). The authors would like to thank many colleagues in Focuslight for their kind support: Leon Li for supporting two bare laser bars, Shiyin Jia and Changxuan Li for providing available experiment samples, Sen Zhao for packaging new samples, Minna Yan for testing instructions, and Xuejie Liang for providing the CAD models.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106640862
Title:Optical sorting of small chiral particles by tightly focused vector beams
Authors:Li, Manman (1); Yan, Shaohui (1); Zhang, Yanan (1, 2); Liang, Yansheng (1); Zhang, Peng (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; (2) University of Chinese, Academy of Sciences, Beijing; 100049, China
Source title:Physical Review A
Abbreviated source title:Phys. Rev. A
Volume:99
Issue:3
Issue date:March 12, 2019
Publication year:2019
Article number:033825
Language:English
ISSN:24699926
E-ISSN:24699934
Document type:Journal article (JA)
Publisher:American Physical Society
Abstract:The identification and separation of substances by chirality has always been an important problem in biomedical research and industry. Light beams carry optical momentum, and can exert optical force on any object they impinge due to the transfer of momentum. Different chiral objects will experience different optical forces when illuminated by the same light beam. We demonstrate here, based on the dipolar approximation, that a tightly focused vector beam can selectively trap and rotate small chiral particles in the transverse plane via the chirality-tailored optical forces. The radial optical force can transversely trap the chiral particles off axis or push them away depending on the real part of the chirality parameter, while the lateral optical force manifesting as the azimuthal optical force can drive the trapped particles to orbitally rotate with opposite chiral absorption in opposite directions. The study reported here may find applications in discriminating and separating chiral objects with specified chirality.
? 2019 American Physical Society.
Number of references:41
Main heading:Screening
Controlled terms:Chirality - Industrial research
Uncontrolled terms:Biomedical research - Chiral absorption - Chiral particles - Dipolar approximations - Optical force - Optical sorting - Transverse planes - Trapped particle
Classification code:802.3 Chemical Operations - 901.3 Engineering Research - 931.3 Atomic and Molecular Physics
DOI:10.1103/PhysRevA.99.033825
Funding details: Number: 2012CB921900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 11474352, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This research is supported by the Natural Science Foundation of China (NSFC) under Grants No. 11474352, No. 81427802 and No. 11574389, and the National Basic Research Program (973 Program) of China under Grant No. 2012CB921900.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006585488
Title:Is it possible to enlarge the trapping range of optical tweezers via a single beam?
Authors:Li, X.Z. (1); Ma, H.X. (1); Zhang, H. (1); Tang, M.M. (1); Li, H.H. (1); Tang, J. (2); Wang, Y.S. (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, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, X.Z.(xzli@haust.edu.cn)
Source title:Applied Physics Letters
Abbreviated source title:Appl Phys Lett
Volume:114
Issue:8
Issue date:February 25, 2019
Publication year:2019
Article number:081903
Language:English
ISSN:00036951
CODEN:APPLAB
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:For optical tweezers, a tiny focal spot of the trapping beam is necessary for providing sufficient intensity-gradient force. This condition results in a limited small trapping range to guarantee stable trapping of the particle. Exploiting structured light, i.e., an optical vortex beam, the trapping range can be enlarged by adjusting its doughnut ring diameter. However, the trapped particle scarcely remains static due to the optical spanner action of the orbital angular momentum of the vortex beam. To enlarge the trapping range and simultaneously ensure stable trapping, we propose a beam, referred to as a mirror-symmetric optical vortex beam (MOV). Essentially, MOV is constructed by using two opposite optical spanners and a pair of static optical tweezers. The optical spanners attract the particle to the site of the static optical tweezers, which realizes long-range optical trapping. Through detailed force-field analysis, it is found that MOV could perform these setting functions. In experiments, yeast cells are manipulated in a long range of ~25 μm, which is 3 times longer than that of the Gaussian beam. Further, the trapping range is easily adjusted by changing a parameter as desired. This technique provides versatile optical tweezers, which will facilitate potential applications for particle manipulation.
? 2019 Author(s).
Number of references:30
Main heading:Optical tweezers
Controlled terms:Gaussian beams - Vortex flow
Uncontrolled terms:Force field analysis - Intensity gradients - Optical spanners - Optical vortex beam - Orbital angular momentum - Particle manipulation - Structured Light - Trapped particle
Classification code:631.1 Fluid Flow, General - 711 Electromagnetic Waves - 744.9 Laser Applications
DOI:10.1063/1.5083108
Funding text:This work was supported by the National Natural Science Foundation of China (Grant Nos. 61775052 and 11704098).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430669
Title:Optical design of all-day star sensor
Authors:Xiao, Nan (1, 2); Wang, Hu (1, 2); Shen, Yang (1, 2); Pan, Yue (1, 2); Wang, Fang (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
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:108380G
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The star sensor is used to detect the position of the stars in space. By recognizing and analyzing star maps, satellites or spacecraft can automatically change the direction of movements to realize the navigation function. However, the strong background radiation in the sky during the day results in a low contrast of the star image. This brings great difficulties to star sensors that work on atmospheric platforms observing stars all the time. To overcome the adverse impacts of the stray lights from the sky during the whole day through the atmosphere, a catadioptric all-day star sensor optical system is presented. In comparison to Cassegrain System, the design has a smaller size of aperture of housing. Therefore, it has the advantage of superb suppression of the stray lights caused by external sky background radiation and other factors. By adopting a plane mirror to compress the light path, the size of the system is decreased, realizing a light and miniaturized design. Based on the analysis of the characteristics of sky background radiation and star radiation, the optical system parameters are selected. The system has a focal length of 800mm, an effective aperture of 70mm, and an instantaneous field of view of 2 °. Meanwhile, with a steering mirror, it can observe an area between 40° and 70° airspace at all day. Finally, the results of the analysis show that the optical system spot shape approaches to a circle in the wide spectrum of 800 nm ~ 1700 nm, and the energy of which is close to the Gaussian distribution and highly concentrated. The modulation transfer function curve is close to the diffraction limit with small chromatic aberration of magnification.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:9
Main heading:Aberrations
Controlled terms:Atmospheric optics - Diffraction - Manufacture - Mirrors - Optical design - Optical systems - Radiation - Stars - Stray light
Uncontrolled terms:All-day - Background radiation - Chromatic aberration - Direction of movements - Navigation functions - Parameter selection - Spectral filtering - Star sensors
Classification code:537.1 Heat Treatment Processes - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.70e-06m, Size 7.00e-02m, Size 8.00e-01m
DOI:10.1117/12.2504892

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006613014
Title:Fast spectral clustering for unsupervised hyperspectral image classification????(Open Access)
Authors:Zhao, Yang (1, 2); Yuan, Yuan (3); Wang, Qi (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Yuan, Yuan(y.yuan1.ieee@gmail.com)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:11
Issue:4
Issue date:February 1, 2019
Publication year:2019
Article number:399
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI AG, Postfach, Basel, CH-4005, Switzerland
Abstract:Hyperspectral image classification is a challenging and significant domain in the field of remote sensing with numerous applications in agriculture, environmental science, mineralogy, and surveillance. In the past years, a growing number of advanced hyperspectral remote sensing image classification techniques based on manifold learning, sparse representation and deep learning have been proposed and reported a good performance in accuracy and efficiency on state-of-the-art public datasets. However, most existing methods still face challenges in dealing with large-scale hyperspectral image datasets due to their high computational complexity. In this work, we propose an improved spectral clustering method for large-scale hyperspectral image classification without any prior information. The proposed algorithm introduces two efficient approximation techniques based on Nystr?m extension and anchor-based graph to construct the affinity matrix. We also propose an effective solution to solve the eigenvalue decomposition problem by multiplicative update optimization. Experiments on both the synthetic datasets and the hyperspectral image datasets were conducted to demonstrate the efficiency and effectiveness of the proposed algorithm.
? 2019 by the authors.
Number of references:51
Main heading:Image classification
Controlled terms:Approximation algorithms - Classification (of information) - Cluster analysis - Clustering algorithms - Deep learning - Efficiency - Eigenvalues and eigenfunctions - Hyperspectral imaging - Image enhancement - Large dataset - Minerals - Remote sensing - Spectroscopy - Unsupervised learning
Uncontrolled terms:Approximation techniques - Eigenvalue decomposition - Environmental science - Hyperspectral Remote Sensing Image - Manifold learning - Multiplicative updates - Spectral clustering - Spectral clustering methods
Classification code:482.2 Minerals - 723 Computer Software, Data Handling and Applications - 903.1 Information Sources and Analysis - 913.1 Production Engineering - 921 Mathematics
DOI:10.3390/rs11040399
Funding details: Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018KJXX-024, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 61773316, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: U1864204, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grants U1864204 and 61773316; State Key Program of National Natural Science Foundation of China under Grant 61632018; Natural Science Foundation of Shaanxi Province under Grant 2018KJXX-024; Projects of Special Zone for National Defense Science and Technology Innovation; Fundamental Research Funds for the Central Universities under Grant 3102017AX010; and Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706497366
Title:Design and fabrication of CGH for 820mm diameter tertiary mirror surface figure testing without center hole
Authors:Pang, Zhihai (1); Feng, Liangjie (1); Ding, Jiaoteng (1); Fan, Xuewu (1); Ma, Zhen (1)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS, Shanxi 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:10840
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Issue date:2019
Publication year:2019
Article number:1084019
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623224
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144711
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Computer-generated hologram (CGH) is an effective way to compensate wavefront aberration in null test of aspheric surfaces and freeform surfaces. Our strategies of CGH design for 820mm diameter tertiary mirror surface figure testing are presented, and an experiment demonstrating the compensation test results of CGH is reported. We design a CGH including two sections on the same substrate in order to align the CGH to the incident wavefront: main section for compensating wavefront in null test, alignment section for adjusting the relative position between CGH and interferometer. Because there is no center hole in the mirror, in order to isolate different orders of diffraction, we used tilt carrier to make different orders of diffraction come to focus at different position perpendicular the axis to avoid ghost reflections.
? 2019 SPIE.
Number of references:11
Main heading:Aberrations
Controlled terms:Alignment - Computer generated holography - Diffraction - Electron holography - Holograms - Manufacture - Mirrors - Nanophotonics - Optical testing - Overhead lines - Surface testing - Wavefronts
Uncontrolled terms:Aspheric surfaces - Computer generated holograms - Free-form surface - Ghost reflections - Relative positions - Tertiary mirror - Two section - Wavefront aberrations
Classification code:537.1 Heat Treatment Processes - 601.1 Mechanical Devices - 706.2 Electric Power Lines and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 743 Holography - 743.1 Holographic Techniques
Numerical data indexing:Size 8.20e-01m
DOI:10.1117/12.2504889

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5672993
Title:A Deep Scene Representation for Aerial Scene Classification
Authors:Zheng, Xiangtao (1); Yuan, Yuan (2); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Center for Optical Imagery Analysis and Learning, School of the Computer Science, Northwestern Polytechnical University, Xi'an; 710072, 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:57
Issue:7
Issue date:July 2019
Publication year:2019
Pages:4799-4809
Article number:8636541
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:As a fundamental problem in earth observation, aerial scene classification tries to assign a specific semantic label to an aerial image. In recent years, the deep convolutional neural networks (CNNs) have shown advanced performances in aerial scene classification. The successful pretrained CNNs can be transferable to aerial images. However, global CNN activations may lack geometric invariance and, therefore, limit the improvement of aerial scene classification. To address this problem, this paper proposes a deep scene representation to achieve the invariance of CNN features and further enhance the discriminative power. The proposed method: 1) extracts CNN activations from the last convolutional layer of pretrained CNN; 2) performs multiscale pooling (MSP) on these activations; and 3) builds a holistic representation by the Fisher vector method. MSP is a simple and effective multiscale strategy, which enriches multiscale spatial information in affordable computational time. The proposed representation is particularly suited at aerial scenes and consistently outperforms global CNN activations without requiring feature adaptation. Extensive experiments on five aerial scene data sets indicate that the proposed method, even with a simple linear classifier, can achieve the state-of-the-art performance.
? 1980-2012 IEEE.
Number of references:53
Controlled terms:aerial photography - classification - deconvolution - geometry - holistic approach - software - vector
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2019.2893115
Funding details: Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the State Key Program of National Natural Science of China under Grant 61632018, in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61806193, in part by the Young Top-Notch Talent Program of the Chinese Academy of Sciences under Grant QYZDB-SSWJSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26, and in part by the Xian Postdoctoral Innovation Base Scientific Research Project.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106962661
Title:Sampling time adaptive single-photon compressive imaging
Authors:Wang, Hui (1); Yan, Qiurong (1, 2); Li, Bing (1); Yuan, Chenglong (1); Wang, Yuhao (1)
Author affiliation:(1) Department of Electronics Information Engineering, Nanchang University, Nanchang; 330031, 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:Yan, Qiurong(yanqiurong@ncu.edu.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:11
Issue:3
Issue date:June 2019
Publication year:2019
Article number:8704316
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We propose a time-adaptive sampling method and demonstrate a sampling-time-adaptive single-photon compressive imaging system. In order to achieve self-adapting adjustment of sampling time, the theory of threshold of light intensity estimation accuracy is deduced. According to this threshold, a sampling control module, based on field-programmable gate array, is developed. Finally, the advantage of the time-adaptive sampling method is proved experimentally. Imaging performance experiments show that the time-adaptive sampling method can automatically adjust the sampling time for the change of light intensity of image object to obtain an image with better quality and avoid speculative selection of sampling time.
? 2019 IEEE.
Number of references:40
Main heading:Particle beams
Controlled terms:Field programmable gate arrays (FPGA) - Photons
Uncontrolled terms:Adaptive sampling - Adaptive sampling methods - Compressive imaging - Control module - Imaging performance - Light intensity - Self adapting - Single photons
Classification code:721.2 Logic Elements - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
DOI:10.1109/JPHOT.2019.2912326
Funding details: Number: 61865010, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61865010 and Grant 61565012, in part by the China Postdoctoral Science Foundation under Grant 2015T80691, in part by the Science and Technology Plan Project of Jiangxi Province under Grant 20151BBE50092, and in part by the Funding Scheme to Outstanding Young Talents of Jiangxi Province under Grant 20171BCB23007.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184105928060
Title:Bidirectional adaptive feature fusion for remote sensing scene classification
Authors:Lu, Xiaoqiang (1); Ji, Weijun (1, 2); Li, Xuelong (1, 2); Zheng, Xiangtao (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing; 100049, China
Corresponding author:Lu, Xiaoqiang(luxiaoqiang@opt.ac.cn)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:328
Issue date:7 February 2019
Publication year:2019
Pages:135-146
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Scene classification has become an effective way to interpret the High Spatial Resolution (HSR) remote sensing images. Recently, Convolutional Neural Networks (CNN) have been found to be excellent for scene classification. However, only using the deep models as feature extractor on the aerial image directly is not proper, because the extracted deep features can not capture spatial scale variability and rotation variability in HSR remote sensing images. To relieve this limitation, a bidirectional adaptive feature fusion strategy is investigated to deal with the remote sensing scene classification. The deep learning feature and the SIFT feature are fused together to get a discriminative image presentation. The fused feature can not only describe the scenes effectively by employing deep learning feature but also overcome the scale and rotation variability with the usage of the SIFT feature. By fusing both SIFT feature and global CNN feature, our method achieves state-of-the-art scene classification performances on the UCMerced, the Sydney and the AID datasets.
? 2018 Elsevier B.V.
Number of references:55
Main heading:Classification (of information)
Controlled terms:Antennas - Deep learning - Image resolution - Neural networks - Remote sensing
Uncontrolled terms:Adaptive features - Convolutional Neural Networks (CNN) - High spatial resolution - Image presentations - Remote sensing images - Scale and rotation - Scene classification - Spatial-scale variability
DOI:10.1016/j.neucom.2018.03.076
Funding details: Number: XAB2017B26, Acronym: -, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: QYZDY-SSW-JSC044, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: QYZDB-SSWJSC015, Acronym: -, Sponsor: Chinese Academy of Sciences Key Technology Talent Program;Number: SKLST2017010, Acronym: -, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 61806193, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant nos. 61761130079 , 61472413, 61806193 , and 61772510 , in part by the Key Research Program of Frontier Sciences, CAS, under Grant no. QYZDY-SSW-JSC044, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant no. QYZDB-SSWJSC015, in part by Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (SKLST2017010), in part by Chinese Academy of Sciences Western Youth Scholar Program B (XAB2017B26) and in part by Xi’an Postdoctoral Innovation Base Scientific Research Project. Xiaoqiang Lu is a Full Professor with the Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi, P. R. China. His current research interests include pattern recognition, machine learning, hyperspectral image analysis, cellular automata, and medical imaging. Weijun Ji is a master with the Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, Shaanxi, P. R. China. His research interests include remote sensing image analysis and computer vision. Xuelong Li is a Full Professor with the Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China, and with the University of Chinese Academy of Sciences, Beijing, China. Xiangtao Zheng received the M.Sc. and Ph.D. degrees in signal and information processing from the Chinese Academy of Sciences, Xi’an, China, in 2014 and 2017, respectively. He is currently an Assistant Professor with the Center for Optical Imagery Analysis and Learning (OPTIMAL), Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences. His research interests include computer vision and pattern recognition.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534743
Title:Nanosecond level passively Q-switched Ti:Sapphire laser using MoS2 as a saturable absorber
Authors:Sun, Zhe (1); Li, Guangying (1); Liu, Huan (1); Cheng, Guanghua (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:Sun, Zhe
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105213
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:A molybdenum disulfide (MoS2) saturable absorber (SA) solution is fabricated by liquid-phase exfoliation (LPE) method. By using the MoS2-SA solution, a compact diode-pumped passively Q-switched Ti:Sapphire laser has been demonstrated. The minimum short pulse width is 3.7 ns and the maximum pulse energy is 16.2 μJ at 1 kHz repetition rate. Our results show that MoS2-SA solution can be developed as an effective saturable absorber to achieve nanosecond pulse laser in the infrared range.
? 2019 SPIE.
Number of references:35
Main heading:Saturable absorbers
Controlled terms:Layered semiconductors - Molybdenum compounds - Photonics - Pulse repetition rate - Pumping (laser) - Q switching - Sapphire - Sulfur compounds - Titanium compounds
Uncontrolled terms:Laser materials - Molybdenum disulfide - Nanosecond pulse lasers - Passively Q-switched - Repetition rate - Short pulse width - Ti: Sapphire laser - Ti:sapphire
Classification code:482.2.1 Gems - 741.1 Light/Optics - 744.1 Lasers, General - 744.8 Laser Beam Interactions
Numerical data indexing:Energy 1.62e-05J, Frequency 1.00e+03Hz, Time 3.70e-09s
DOI:10.1117/12.2521960
Funding details: Number: XAB2015B27, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:This work supported by CAS "Light of West China" Program, (No: XAB2015B27)

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535036
Title:Freeway variable speed limit system based on traffic meteorological environment monitoring
Authors:Kang, Heng (1, 3); Li, Yongfang (3); Ruan, Chi (2)
Author affiliation:(1) Union Research Center for Advanced Photonics and Optical Engineering, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shanxi Normal University, Xi'an; 710119, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Ruan, Chi
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520G
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:In order to reasonably determine the safe speed limit of expressway under several meteorological conditions such as stagnant water, icing, snow, fog, and provide the driver with the maximum acceptable safe speed, this paper proposes a Freeway variable speed limit system based on traffic meteorological environment monitoring. This paper establishes a speed limit model based on visibility, illumination and road surface state. The STM32f103 is proposed as a controller to collect meteorological information in real time using road surface condition monitoring equipment, visibility meter and illumination meter. And use LED information board to prompt the maximum safe speed in real time. This paper is based on QT5 development of the host computer client. QT has the advantages of high modularity and good reusability, and can be extended to other functions as needed.
? 2019 SPIE.
Number of references:5
Main heading:Speed
Controlled terms:Condition monitoring - Information use - Photonics - Reusability - Roads and streets - Speed control - Traffic control - Visibility
Uncontrolled terms:Environment monitoring - Meteorological condition - Meteorological information - Monitoring equipment - Road surface condition - STM32 - Traffic information - Variable speed limit systems
Classification code:406.2 Roads and Streets - 731.3 Specific Variables Control - 741 Light, Optics and Optical Devices - 903.3 Information Retrieval and Use
DOI:10.1117/12.2521114

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20185306321881
Title:Investigation of isolation for free space laser communication in the mono-wavelength optical T/R channels
Authors:Xia, Fangyuan (1, 2, 3); Yang, Jianfeng (1); Yao, Zhoushi (3); Song, Yansong (3); Ren, Lanxu (3); Tan, Qinggui (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'an Institute of Space Radio Technology, Xi'an; 710100, China
Corresponding author:Xia, Fangyuan(xfy8722@qq.com)
Source title:Optik
Abbreviated source title:Optik
Volume:181
Issue date:March 2019
Publication year:2019
Pages:738-747
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Favorable isolation performance in optical transmitting-receiving (T/R) channels is key to establishing full-duplex bi-directional laser communication links when designing mono-wavelength laser communication terminals. This study proposes a novel design scheme for T/R channels that use a single laser wavelength. The system includes measures such as the deflection at λ/4 wave plate angles, light trap installation at a polarization beam splitter, and removal of polarization analyzers in optimized systems. A mathematical model describing isolation in the optical T/R channels is presented. Three types of factors that affect the isolation of optical T/R channels were analyzed and simulated in detail. The present simulation results show that the roughness of the λ/4 wave plate and the solid angle of the detector field of view are exponentially related to T/R isolation, which can thus be regarded as the most significant factors affecting isolation. According to the present design scheme, the prototype T/R channel was developed for measuring isolation. The measured value (77.8 dB) agrees well with the result determined using the established mathmatical model (77.3 dB). Conclusively, the present theoretical model can provideguidance for optimizing isolation in a mono-wavelength optical channel. Thus, it can be applied extensively in laser communication systems, including inter-satellite networks.
? 2018 Elsevier GmbH
Number of references:16
Main heading:Optical communication
Controlled terms:Integrated optics - Light polarization - Optical devices - Polarization - Satellite communication systems - Scattering
Uncontrolled terms:Free space laser communications - Isolation performance - Mathmatical models - Polarization analyzers - Polarization beam splitters - Theoretical modeling - Transmitting-receiving isolation - Wavelength lasers
Classification code:655.2.1 Communication Satellites - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Decibel 7.73e+01dB, Decibel 7.78e+01dB
DOI:10.1016/j.ijleo.2018.12.090
Funding details: Number: 61231012, Acronym: -, Sponsor: National Aerospace Science Foundation of China;Number: 93438108, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61775026, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work is supported by the Key Program of the National Nature Science Foundation of China (Grant No. 61231012 ), the National Natural Science Foundation of China (Grant Nos. 93438108 , 61775026 ). The authors also gratefully acknowledge the efforts and suggestions of all the referees.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190306381862
Title:Auxiliary structure of nano-pinnacle prepared on silicon substrate: Improving the emission intensity by 9 times in SSI-LEDs
Authors:Liu, Lingguang (1); Wang, Yaogong (1); Lin, Yuanyuan (1); Zhang, Xiaoning (1); Kuo, Yue (2); Tian, Jinshou (3, 4)
Author affiliation:(1) Key Laboratory of Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Thin Film Nano & Microelectronics Research Lab, Texas A&M University, College Station; TX; 77843-3122, United States; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Key Lab Transient Opt & Photon, Xi'an; 710119, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; Shanxi; 030006, China
Corresponding author:Wang, Yaogong(wyg008@xjtu.edu.cn)
Source title:Materials Science in Semiconductor Processing
Abbreviated source title:Mater Sci Semicond Process
Volume:93
Issue date:April 2019
Publication year:2019
Pages:226-230
Language:English
ISSN:13698001
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Auxiliary structure of nano-pinnacle is prepared on silicon substrate of SSI-LEDs device, and the micro-structure properties, electrical and optical characteristics of the proposed structure device are investigated. Non-uniform size and geometry of nano-pinnacles are prepared by wet-etching, and the most frequent geometry is ~230 × 140 nm pyramids. With help of the nano-pinnacle structure, the electric field strength distributed on treated surface of the nano-pinnacle sample is enhanced by ~4 times, resulting in the increase of the density of conductive paths by 3.6 times. By exploring the electrical and optical results, the onset voltage of light emission is decreased by 60% from ? 7.6 V to ? 3.4 V, and the emission intensity and efficiency are improved by ~9 times and ~8 times, respectively compared with the traditional structure device of SSI-LEDs.
? 2019 Elsevier Ltd
Number of references:17
Main heading:Light emitting diodes
Controlled terms:Auxiliary equipment - Electric breakdown - Electric fields - Silicon - Substrates
Uncontrolled terms:Broadband light - Conductive paths - Electric field strength - Emission intensity - Nano-pinnacle - Optical characteristics - Silicon substrates - Traditional structures
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 901 Engineering Profession
Numerical data indexing:Percentage 6.00e+01%, Size 1.40e-07m, Voltage 3.40e+00V
DOI:10.1016/j.mssp.2019.01.010
Funding details: Number: 2015KW-006, Acronym: -, Sponsor: International Cooperation and Exchange Programme;Number: -, Acronym: XJTU, Sponsor: Xi’an Jiaotong University;Number: 61771382, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors would like to acknowledge the financial support provided by the National Natural Science Foundation of China (Grant Number: 61771382 and 51807156 ) and the Shaanxi International Science and Technology Cooperation and Exchange Program ( 2018KW-034 and 2015KW-006 ). The SEM work were done at International Center for Dielectric Research (ICDR), Xi’an Jiaotong University, Xi'an, China and Instrument Analysis Center of Xi'an Jiaotong University. The XPS test were done at Instrument Analysis Center of Xi'an Jiaotong University. The authors also thank Ms. Dai and Mr. Ren for their help in using SEM, and Ms. Liu for her help in testing XPS.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806517243
Title:Haze-removal polarimetric imaging schemes with the consideration of airlight's circular polarization effect
Authors:Zhang, Wenfei (2); Liang, Jian (1); Ren, Liyong (1)
Author affiliation:(1) Research Department of Information Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo; 255000, China
Corresponding author:Ren, Liyong(renliy@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:182
Issue date:April 2019
Publication year:2019
Pages:1099-1105
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:The polarimetric dehazing methods have been proven effective in enhancing the quality of images acquired in turbid media, including in hazy weather conditions. However, traditional polarimetric dehazing methods are all based on a hypothesis that the airlight only performs linear polarization property. The circular polarization effect is usually ignored although it may be an essential component of the airlight. In this paper, we report a new polarimetirc dehazing method considering the full polarization effects of the airlight (the linear and circular polarization effects of the airlight). In addition, an effective dehazing method only using the circular polarization effect of the airlight is given. Experimental results verify the effectiveness and the universality of the proposed method, and its dehazing capacity is obviously enhanced. Meanwhile, the circular polarization effect based method also can effectively achieve dehazing result only with one intensity image and one circular polarization image. This method is much easier to implement, although the dehazing results are not comparative to that of the full polarization effects based method. The proposed methods would advance the applications of the polarimetric dehazing methods in dehazing application filed.
? 2019 Elsevier GmbH
Number of references:24
Main heading:Demulsification
Controlled terms:Circular polarization - Image enhancement - Polarimeters - Turbidity
Uncontrolled terms:Airlight - Full polarization - Haze removal - Imaging through turbid media - Intensity images - Linear polarization - Polarimetric imaging - Turbid media
Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 802.3 Chemical Operations - 941.3 Optical Instruments
DOI:10.1016/j.ijleo.2019.01.048
Funding details: Number: 61275149, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61505246, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by National Natural Science Foundation of China under grant 61505246, 61275149 and 61535015.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183605788147
Title:Polarization properties of calibration reflector system in the polarization-modulated space laser communication
Authors:Chen, Guoqing (1, 2); Xue, Bin (1); Yang, Jianfeng (1); Zhao, Yiyi (1); Wang, Xingfeng (1, 2); He, Jiawei (1, 2)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:430
Issue date:1 January 2019
Publication year:2019
Pages:311-317
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:S-polarization light and p-polarization light are mutually cross orthogonal, which can be used as signal light for emitting and receiving in the polarization-modulated space laser communication, respectively. Due to the retro reflection characteristics of the corner cube retroreflector (CCR), it is widely used as a calibration reflector system in the polarization-modulated space laser communication. The polarization states of the incident light will be change owing to the total internal reflection (TIR) of uncoated rear surface, in addition, each of the six propagation trips will in general produce a different output polarization. For the calibration reflector system in the polarization-modulated space laser communication, the polarization state of the received light, especially the intensity ratio of the p-polarization component, needs to be clarified. In this paper, a framework is presented to calculate polarization by ray tracing through CCR with arbitrary input polarization states and incident angles. On this basis, the relationships between intensity ratio of the p-polarization component in the received light of each propagation trip and the incident light with different polarization states at normal incidence as well as the circular polarized light at incident angles within ± 15°analyzed. Theoretical analysis and experiments have guiding significance for the development of the polarization-modulated space laser communication.
? 2018
Number of references:12
Main heading:Polarization
Controlled terms:Calibration - Ray tracing - Reflection - Refractive index
Uncontrolled terms:Corner Cube Retro reflectors - Guiding significances - Polarization properties - Polarization state - Polarization-modulated - Reflector system - Space laser communication - Total internal reflections
Classification code:741.1 Light/Optics
DOI:10.1016/j.optcom.2018.06.058

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5622675
Title:Integrating temporal and spatial control of electronic transitions for bright multiphoton upconversion
Authors:Sun, Tianying (1, 2); Li, Yuhua (3); Ho, Wai Lok (3); Zhu, Qi (1, 2); Chen, Xian (1, 2); Jin, Limin (4); Zhu, Haomiao (5); Huang, Bolong (6); Lin, Jun (7); Little, Brent E. (8); Chu, Sai Tak (3); Wang, Feng (1, 2)
Author affiliation:(1) Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong; (2) City University of Hong Kong Shenzhen Research Institute, Shenzhen; 518057, China; (3) Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong; (4) State Key Laboratory on Tunable laser Technology, Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen; 518055, China; (5) Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen; Fujian; 361000, China; (6) Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong; (7) State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun; 130022, China; (8) 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, Feng(fwang24@cityu.edu.hk)
Source title:Nature Communications
Abbreviated source title:Nat. Commun.
Volume:10
Issue:1
Issue date:December 1, 2019
Publication year:2019
Article number:1811
Language:English
E-ISSN:20411723
Document type:Journal article (JA)
Publisher:Nature Publishing Group, Houndmills, Basingstoke, Hampshire, RG21 6XS, United Kingdom
Abstract:The applications of lanthanide-doped upconversion nanomaterials are limited by unsatisfactory brightness currently. Herein, a general strategy is proposed for boosting the upconversion efficiency in Er3+ ions, based on combined use of a core?shell nanostructured host and an integrated optical waveguide circuit excitation platform. A NaErF4@NaYF4 core?shell nanoparticle is constructed to host the upconversion process for minimizing non-radiative dissipation of excitation energy by surface quenchers. Furthermore, an integrated optical microring resonator is designed to promote absorption of excitation light by the nanoparticles, which alleviates quenching of excited states due to cross-relaxation and phonon-assisted energy transfer. As a result, multiphoton upconversion emission with a large anti-Stokes shift (greater than 1150 nm) and a high energy conversion efficiency (over 5.0%) is achieved under excitation at 1550 nm. These advances in controlling photon upconversion offer exciting opportunities for important photonics applications.
? 2019, The Author(s).
Number of references:46
Controlled terms:absorption - electron - integrated approach - nanoparticle - resonance - wavelet analysis
Classification code:901 Geobase: Related Topics
DOI:10.1038/s41467-019-09850-2

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607097436
Title:Prediction of penetration depth of earth penetrator based on neural network
Authors:Zhuo, Chen (1); Huixiang, Sun (1); Yingwu, Wang (2); Huan, Niu (1)
Author affiliation:(1) College of Aeronautics Engineering, Air Force Engineering University, Shanxi, Xi'an; 710038, China; (2) Xi'An Institute of Optics and Precision Mechanics of Cas, Shanxi, Xi'an; 710068, China
Source title:IOP Conference Series: Earth and Environmental Science
Abbreviated source title:IOP Conf. Ser. Earth Environ. Sci.
Volume:267
Part number:3 of 6
Issue:3
Issue title:2019 3rd International Workshop on Renewable Energy and Development, IWRED 2019 - Energy Efficient Systems and Optimization Theory
Issue date:June 10, 2019
Publication year:2019
Article number:032004
Language:English
ISSN:17551307
E-ISSN:17551315
Document type:Conference article (CA)
Conference name:2019 3rd International Workshop on Renewable Energy and Development, IWRED 2019
Conference date:March 8, 2019 - March 10, 2019
Conference location:Guangzhou, China
Conference code:148815
Publisher:Institute of Physics Publishing
Abstract:An artificial intelligence neural network model is established in this essay to seek a more general method for predicting penetration depth of earth penetrator, to comprehensively analyze the effect of various parameters on penetration depth as well as to predict the penetration depth of earth penetrator.This paper, by means of numerical simulation, and determined the ordnance penetrator warhead curvature radius, the length of the projectile, the density of the projectile,the density of the target protective layer, the elastic modulus of the target protective layer and the hit velocity of the earth penetrator.This six key parameters as the input data of neural network model, and by using numerical simulation to obtain the data needed for training the neural network model samples. According to the characteristics of six input data and one output data of the neural network model, the possible structure of the neural network model is set, and the optimal model structure is selected through training. We built neural network model to forecast the ordnance penetrator penetration depth, analyzes the six key parameter's influence on the depth of penetration, the results show that reducing the warhead curvature radius, increasing the length and density of the projectile, properly increasing the impact velocity of the projectile can improve the penetration ability of the earth penetrating projectile, and increasing the density and elastic modulus of the target protective layer can improve the anti-penetration ability of the protective layer.
? Published under licence by IOP Publishing Ltd.
Number of references:13
Main heading:Projectiles
Controlled terms:Elastic moduli - Energy efficiency - Forecasting - Input output programs - Numerical methods - Numerical models - Ordnance - Site selection - Structural optimization
Uncontrolled terms:Anti-penetration abilities - Curvature radii - Earth Penetrator - Impact velocities - Neural network model - Optimal model structures - Penetration ability - Protective layers
Classification code:404.1 Military Engineering - 525.2 Energy Conservation - 723.1 Computer Programming - 921 Mathematics - 951 Materials Science
DOI:10.1088/1755-1315/267/3/032004

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407327516
Title:Optical Design of a Compound Eye Camera with a Large-field of View for Unmanned Aerial Vehicles
Title of translation:小型无人机载大视场复眼相机光学系统设计
Authors:Yu, Xiao-Dan (1, 2); Zhang, Yuan-Jie (1, 2); Wang, Yuan-Yuan (1, 3); Xu, Huang-Rong (1, 2); Yu, Wei-Xing (1, 2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun; 130033, China
Corresponding author:Yu, Wei-Xing(yuwx@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:7
Issue date:July 1, 2019
Publication year:2019
Article number:0722003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A large field of view Unmanned Aerial Vehicle (UAV) camera imaging system, named curved compound eye camera for the small UAV, was designed. The system consists of three subsystems, a cured microlens arrays, an optical transformation subsystem, and a data processing unit with image sensors. The designed compound camera has a focal length of 4 mm, a F number of 4, and a field of view is 106°, which makes it can resolve the ground target with a feature size of 0.5 m at an altitude of 500 m. In the design, lenslets with a doublet form were used in curved compound eye to eliminate the optical abberations. Since there is an overlap in field of view for neighboring lenslets, lenslets as much as of 7 can view the same target at the same time from different view angles, which allows the object location and speed measurement. The simulation results show that the image quality of the entire compound eye camera system meets the requirements with an acceptable tolerance, and the maximum optical distortion can be controlled under 1.2%.
? 2019, Science Press. All right reserved.
Number of references:13
Main heading:Unmanned aerial vehicles (UAV)
Controlled terms:Antenna arrays - Cameras - Data handling - Fits and tolerances - Metadata - Microlenses - Microoptics - Optical design - Optical instrument lenses - Quality control
Uncontrolled terms:Compound eye - Large field of views - Micro-lens arrays - Target positioning - Tolerance analysis
Classification code:652.1 Aircraft, General - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 913.3 Quality Assurance and Control
Numerical data indexing:Percentage 1.20e+00%, Size 4.00e-03m, Size 5.00e+02m, Size 5.00e-01m
DOI:10.3788/gzxb20194807.0722003
Funding details: Number: 61475156, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (No.61475156).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307009700
Title:Low-cost temperature- And strain-insensitive twist sensor based on a hybrid fiber grating structure
Authors:Guo, Xi (1); Xing, Zhikun (1); Qin, Huabao (1); Sun, Qizhen (1); Wang, Hushan (2); Liu, Deming (1); Zhang, Lin (3); Yan, Zhijun (1, 2, 3)
Author affiliation:(1) School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, 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, Chinese Academy of Sciences, Xi’an; 710119, China; (3) Aston Institute of Photonic Technologies, Aston University, Birmingham; B4 7ET, United Kingdom
Corresponding author:Yan, Zhijun(yanzhijun@gmail.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:16
Issue date:June 1, 2019
Publication year:2019
Pages:4479-4483
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We proposed and experimentally demonstrated a temperature- and strain-insensitive twist sensor based on a hybrid fiber grating structure, in which the hybrid grating structure is constructed with a 45°-tilted fiber grating and a chirped fiber Bragg grating UV-inscribed in a single-mode fiber in series. The sensing performance has been evaluated by experimental and numerical analyses, which are in good consistency. The experimental results show that the hybrid-grating-structure-based twist sensor has a maximum twist sensitivity up to 15.037 dB/rad. Moreover, due to the invariability of the fiber birefringence and the state of polarization of the input light, such sensor has intrinsically low temperature and strain sensitivities of 7.86 × 10?3 dB∕°C and 6.7 × 10?5 dB∕μΕ, corresponding to the maximum twist measurement error resulting from temperature and strain of 5.2 × 10?4 rad∕°C and 4.5 × 10?6 rad∕μΕ, respectively.
? 2019 Optical Society of America
Number of references:25
Main heading:Fibers
Controlled terms:Costs - Fiber Bragg gratings - Single mode fibers - Temperature
Uncontrolled terms:Chirped fiber Bragg grating - Experimental and numerical analysis - Fiber birefringence - Low temperatures - Sensing performance - State of polarization - Strain sensitivity - Tilted fiber gratings
Classification code:641.1 Thermodynamics - 741.1.2 Fiber Optics - 911 Cost and Value Engineering; Industrial Economics
DOI:10.1364/AO.58.004479
Funding details: Number: 2018CFA004, Acronym: -, Sponsor: Natural Science Foundation of Hubei Province;Number: 2017KFYXJJ033, Acronym: -, Sponsor: Henan University of Science and Technology;Number: 61605239, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2018AAA040, Acronym: -, Sponsor: -;
Funding text:Funding. National Natural Science Foundation of China (NSFC) (61505244, 61605239); Fundamental Research Funds for the Central Universities, HUST (2017KFYXJJ033); Natural Science Foundation of Hubei Province (2018CFA004); Major Projects of Technical Innovation of Hubei (2018AAA040).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607409765
Title:Underwater LED Communication Based on Secondary Light Distribution with Total Internal Reflection Lens
Title of translation:基于全内反射透镜二次配光的水下LED通信研究
Authors:Wang, Tao (1, 2); Han, Biao (1); Shi, Kui (1); Wu, Yafeng (1); Zheng, Yunqiang (1); Han, Yi (1); Xie, Xiaoping (1); Wang, Wei (1); Meng, Jiacheng (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; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:39
Issue:8
Issue date:August 10, 2019
Publication year:2019
Article number:0806001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:Blue-green LED communication is considered to be an effective means to solve the problem of underwater short-distance high-speed wireless data transmission. However, as LED divergence angle is usually quite large, the geometric loss is great in such communication link, which would reduce the communication distance. Aiming at this problem, a method is proposed to compress the emitter angle of underwater LED array light source with the total internal reflection (TIR) lens in this work. First, the divergence angle of LED array source is compressed from 130°to 7°. Then, a communication transmitter prototype is developed with the source, and a test system is built in a large tank to test the performance of the transmitter. The experimental results show that the communication prototype designed in this paper can support a maximum transmission rate of 23 Mbit/s when the underwater transmission distance is 16.6 m. Compared with the case without TIR lens, the maximum transmission distance increases 9.3 m at the same rate. It shows that the method of secondary light distribution with TIR lens can effectively reduce the transmitter's divergence angle and the link loss of transmission system, enhance the transmission capacity of communication system. It provides a new technical means for improving the transmission performance of underwater LED communication.
? 2019, Chinese Lasers Press. All right reserved.
Number of references:26
Main heading:Optical communication
Controlled terms:Lenses - Light emitting diodes - Light reflection - Refractive index - Transmitters
Uncontrolled terms:Communication distance - Communication prototypes - Total internal reflections - Transmission capacities - Transmission distances - Transmission performance - Underwater communication - Wireless optical communication
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Bit_Rate 2.30e+07bit/s, Size 1.66e+01m, Size 9.30e+00m
DOI:10.3788/AOS201939.0806001

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190906548623
Title:Controllable dot-matrix marking on titanium alloy with anti-reflective micro-structures using defocused femtosecond laser
Authors:Sun, Xiaoyun (1, 2); Wang, Wenjun (1, 2); Mei, Xuesong (1, 2); Pan, Aifei (1, 2); Liu, Bin (1, 2); Li, Ming (3)
Author affiliation:(1) State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an; 710054, China; (2) Shaanxi Key Laboratory of Intelligent Robots, Xi'an; 710054, China; (3) Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding author:Wang, Wenjun(wenjunwang@mail.xjtu.edu.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:115
Issue date:July 2019
Publication year:2019
Pages:298-305
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:This paper reports on the fabrication of marking units of controllable size ranging from 300 to 500 μm equipped with anti-reflective micro-structures using defocused femtosecond laser on titanium alloy TC4. The results show that the range of diameters of marking units (laser ablation-based craters) goes through three stages with the increase of the pulse number. The craters are too shallow for the first stage and too deep for the third stage to meet the criterion of depth, so the second stage turns out to be the optimal stage of parameter selection, where the diameter and depth of marking units are within a desired range with modification of laser energy and defocusing amount. Besides meeting the marking requirements of the size and morphology, the anti-reflective micro-structures with great color difference are formed on the surface of marking units, which contributes to the high recognition rate. Compared with the conventional marking methods, this method has a great recognition rate without recast layer and micro-cracks. Therefore, the femtosecond laser-based processing would provide a new marking technology with high efficiency and quality.
? 2019 Elsevier Ltd
Number of references:46
Main heading:Femtosecond lasers
Controlled terms:Colorimetry - Laser ablation - Microstructure - Titanium alloys
Uncontrolled terms:Anti-reflective - Color difference - Controllable size - Defocusing - High-efficiency - Laser energies - Marking method - Parameter selection
Classification code:542.3 Titanium and Alloys - 641.2 Heat Transfer - 941.4 Optical Variables Measurements - 951 Materials Science
Numerical data indexing:Size 3.00e-04m to 5.00e-04m
DOI:10.1016/j.optlastec.2019.02.022
Funding details: Number: 2017YFB1104602, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);
Funding text:This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFB1104602) and the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT_15R54).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193707423899
Title:Spatial structure preserving feature pyramid network for semantic image segmentation
Authors:Yuan, Yuan (1); Fang, Jie (2, 3); Lu, Xiaoqiang (3); Feng, Yachuang (3)
Author affiliation:(1) Center for OPTical Imagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an, Shaanxi; 710072, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:ACM Transactions on Multimedia Computing, Communications and Applications
Abbreviated source title:ACM Trans. Multimedia Comput. Commun. Appl.
Volume:15
Issue:3
Issue date:August 2019
Publication year:2019
Article number:73
Language:English
ISSN:15516857
E-ISSN:15516865
Document type:Journal article (JA)
Publisher:Association for Computing Machinery
Abstract:Recently, progress on semantic image segmentation is substantial, benefiting from the rapid development of Convolutional Neural Networks. Semantic image segmentation approaches proposed lately have been mostly based on Fully convolutional Networks (FCNs). However, these FCN-based methods use large receptive fields and too many pooling layers to depict the discriminative semantic information of the images. Specifically, on one hand, convolutional kernel with large receptive field smooth the detailed edges, since too much contexture information is used to depict the "center pixel." However, the pooling layer increases the receptive field through zooming out the latest feature maps, which loses many detailed information of the image, especially in the deeper layers of the network. These operations often cause low spatial resolution inside deep layers, which leads to spatially fragmented prediction. To address this problem, we exploit the inherent multi-scale and pyramidal hierarchy of deep convolutional networks to extract the feature maps with different resolutions and take full advantages of these feature maps via a gradually stacked fusing way. Specifically, for two adjacent convolutional layers, we upsample the features from deeper layer with stride of 2 and then stack them on the features from shallower layer. Then, a convolutional layer with kernels of 1 × 1 is followed to fuse these stacked features. The fused feature preserves the spatial structure information of the image; meanwhile, it owns strong discriminative capability for pixel classification. Additionally, to further preserve the spatial structure information and regional connectivity of the predicted category label map, we propose a novel loss term for the network. In detail, two graph model-based spatial affinity matrixes are proposed, which are used to depict the pixel-level relationships in the input image and predicted category label map respectively, and then their cosine distance is backward propagated to the network. The proposed architecture, called spatial structure preserving feature pyramid network, significantly improves the spatial resolution of the predicted category label map for semantic image segmentation. The proposed method achieves state-of-the-art results on three public and challenging datasets for semantic image segmentation.
? 2019 Association for Computing Machinery.
Number of references:55
Main heading:Image segmentation
Controlled terms:Classification (of information) - Convolution - Image enhancement - Image resolution - Network layers - Neural networks - Pixels - Semantic Web - Semantics
Uncontrolled terms:Convolutional networks - Convolutional neural network - Discriminative capability - Feature pyramid - Proposed architectures - Semantic image segmentations - Spatial resolution - Spatial structure information
Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications
DOI:10.1145/3321512
Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDB-SSW-JSC015, Acronym: -, Sponsor: Chinese Academy of Sciences Key Technology Talent Program;Number: QYZDY-SSW-JSC044, Acronym: HFSP, Sponsor: Human Frontier Science Program;Number: XAB2017B15, Acronym: -, Sponsor: National High-tech Research and Development Program;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and 61702498, in part by the Key Research Program of Frontier Sciences, CAS under Grant QYZDY-SSW-JSC044, in part by the Young Top-notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the National Key R&D Program of China under Grant 2017YFB0502900, in part by the CAS "Light of West China" Program under Grant XAB2017B15.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193307311177
Title:Planar and ridge waveguides in Yb3+-doped silicate glasses fabricated by proton implantation and precise diamond blade dicing
Authors:Zhang, Jie (1); Guo, Wen-Tao (1); Tang, Chen-Yang (1); Yan, Sen (1); Li, Wei-Nan (2); Liu, Chun-Xiao (1)
Author affiliation:(1) College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing; 210023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xían Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xían; 710119, China
Corresponding author:Liu, Chun-Xiao(chunxiaoliu@njupt.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:453
Issue date:15 December 2019
Publication year:2019
Article number:124344
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:We firstly report on the planar waveguide via the single-energy proton implantation in the Yb3+-doped silicate glass. The implanted energy and fluence are 400 keV and 8.0×1016 ions/cm2, respectively. The thermal treatment at 200 °C for 1h was used to optimize waveguiding characteristics. The guided-mode spectra in the planar waveguide before and after annealing were characterized by the m-line method at 632.8 and 1539 nm. The distributions of refractive index for the as-implanted and annealed planar waveguides were reconstructed by the reflectivity calculation method. The optical characterizations were conducted at 632.8 nm using the end-fire coupling method before and after the thermal treatment. Then, the ridge waveguide was formed by the precise diamond blade dicing on the annealed planar Yb3+-doped silicate glass waveguide. The microscope image and near-field intensity profile of the ridge waveguide were investigated by the metallographic microscope and the end-face coupling system, respectively.
? 2019 Elsevier B.V.
Number of references:32
Main heading:Ridge waveguides
Controlled terms:Annealing - Diamonds - Glass - Ion implantation - Optical waveguides - Planar waveguides - Refractive index - Silicates - Waveguides
Uncontrolled terms:Diamond blades - End-fire coupling - Metallographic microscope - Near-field intensity - Optical characterization - Proton implantation - Silicate glass - Wave-guiding characteristics
Classification code:482.2.1 Gems - 537.1 Heat Treatment Processes - 714.3 Waveguides - 741.1 Light/Optics - 812.3 Glass
Numerical data indexing:Electron_Volt 4.00e+05eV, Size 1.54e-06m, Size 6.33e-07m, Temperature 4.73e+02K, Time 3.60e+03s
DOI:10.1016/j.optcom.2019.124344
Funding details: Number: 11405041, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was financially supported by the National Natural Science Foundation of China (Grant No. 11405041 ), Scientific Research Starting Foundation for New Teachers of Nanjing University of Posts and Telecommunications (Grant No. NY219101 ) and Key R&D Program Project of Shaanxi Province (General Project-Industrial Field 2019GY-112 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192407025900
Title:Electron-transfer cascade from CdSe@ZnSe core-shell quantum dot accelerates photoelectrochemical H2 evolution on TiO2 nanotube arrays
Authors:Jia, Jia (1); Xue, Peng (1); Hu, Xiaoyun (2); Wang, Yishan (3); Liu, Enzhou (1, 2); Fan, Jun (1)
Author affiliation:(1) School of Chemical Engineering, Northwest University, Xi'an; 710069, China; (2) School of Physics, Northwest University, Xi'an; 710069, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Liu, Enzhou(liuenzhou@nwu.edu.cn)
Source title:Journal of Catalysis
Abbreviated source title:J. Catal.
Issue date:July 2019
Publication year:2019
Pages:81-94
Language:English
ISSN:00219517
E-ISSN:10902694
CODEN:JCTLA5
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:A novel TiO2-CdSe-ZnSe electron-transfer cascade heterostructure with nanoscale precision is synthesized for hydrogen evolution, exhibiting an obvious hierarchical absorption and improved separation efficiency for photocarriers. The key to this constructed structure lies in the in-situ deposition of CdSe quantum-dots onto the surface of TiO2 followed by the epitaxial growth of a ZnSe shell. In this conditions, the CdSe core can serve as a buffer layer for the electrons on the conduction band of the ZnSe shell, enabling them to rapidly migrate to the TiO2 and later to the opposite electrode to produce H2; meanwhile, due to high injection efficiency in the cascade type II structure, holes from TiO2 are transferred to the electrolyte interface, where the oxidation reaction of hole trapping scavenger occurs. Surprisingly, this heterostructure shows a significantly enhanced photocurrent density (1.45 mA cm?2), favorable H2 production rates (252 μmol h?1 cm?2) and moderate durability under light irradiation.
? 2019 Elsevier Inc.
Number of references:69
Main heading:Cadmium compounds
Controlled terms:Buffer layers - Efficiency - Electrochemistry - Electrolytes - Electron transitions - Hydrogen production - II-VI semiconductors - Nanocrystals - Nanotubes - Selenium compounds - Semiconductor quantum dots - Shells (structures) - Titanium dioxide - Yarn - Zinc compounds
Uncontrolled terms:Core shell - Core-shell quantum dots - Electrolyte interfaces - H2 evolution - Photocurrent density - Photoelectrochemicals - Separation efficiency - TiO2 nanotube arrays
Classification code:408.2 Structural Members and Shapes - 522 Gas Fuels - 702 Electric Batteries and Fuel Cells - 714.2 Semiconductor Devices and Integrated Circuits - 801.4.1 Electrochemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 819.4 Fiber Products - 913.1 Production Engineering - 933.1 Crystalline Solids
DOI:10.1016/j.jcat.2019.05.028
Funding details: Number: 2016M600809, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 21476183, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 21676213, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201703, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: YYB17015, Acronym: NWU, Sponsor: Northwest University;
Funding text:This work was supported by the National Natural Science Foundation of China (Nos. 21676213 and 21476183), the China Postdoctoral Science Foundation (No. 2016M600809), the Natural Science Basic Research Plan in Shaanxi Province of China (Nos. 2017JM2026 and 2018JM5020), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (No. SKLST201703), and the Graduate Student Innovation Funds of Northwest University (No. YYB17015).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191806862559
Title:High-speed focusing and scanning light through a multimode fiber based on binary amplitude-only modulation parallel coordinate algorithm
Authors:Geng, Yi (1, 3); Zhao, Guangzhi (1, 3); Chen, Hui (1, 3); Xu, Chengfang (1, 3); Zhuang, Bin (1, 3); Ren, Liyong (1, 2)
Author affiliation:(1) Research Department of Information Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Physics and Information Technology, ShaanXi Normal University, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Ren, Liyong(renliy@opt.ac.cn)
Source title:Applied Physics B: Lasers and Optics
Abbreviated source title:Appl Phys B
Volume:125
Issue:5
Issue date:May 1, 2019
Publication year:2019
Article number:83
Language:English
ISSN:09462171
CODEN:APBOEM
Document type:Journal article (JA)
Publisher:Springer Verlag
Abstract:In this paper, we present a binary amplitude-only modulation parallel coordinate algorithm for focusing and scanning light through a multimode fiber (MMF) based on the digital micro-mirror device (DMD) in a reference-free multimode fiber imaging system. In principle, our algorithm is capable of efficiently calculating the masks to be added to DMD for yielding a series of tightly focused spots; and for the same number of modulation sub-regions, our method is more than M (the number of focused spots) times faster than the amplitude iterative optimization algorithm. In the experiment, efficient light focusing and scanning at the distal end of the MMF are demonstrated. Furthermore, we demonstrate that the proposed method can also be extended to focus and scan light at multiple planes along the axial direction by just modifying the input wavefront accordingly; and our algorithm can be applied not only in multimode optical fiber focusing but also to other disordered media. Particularly, it will be valuable in fast multimode fiber calibration for endoscopic imaging.
? 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:32
Main heading:Multimode fibers
Controlled terms:Focusing - Iterative methods - Modulation - Optical fibers - Scanning
Uncontrolled terms:Digital micro-mirror device - Disordered media - Endoscopic imaging - Focusing and scanning - Iterative optimization algorithms - Multi-mode fibers (MMF) - Multimode optical fibers - Parallel coordinates
Classification code:741.1.2 Fiber Optics - 921.6 Numerical Methods
DOI:10.1007/s00340-019-7197-9
Funding details: Number: 61535015, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grant 61535015.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006914349
Title:Near-infrared carbon-implanted waveguides in Tb3+-doped aluminum borosilicate glasses
Authors:Wang, Yue (1); Zhao, Jiaxin (1); Zhu, Qifeng (1); Shen, Jianping (1); Wang, Zhongyue (1); Guo, Hai-Tao (2); Liu, Chunxiao (1)
Author affiliation:(1) College of Electronic and Optical Engineering, Nanjing University of Post and Telecommunications, Nanjing; 210023, 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:Liu, Chunxiao(chunxiaoliu@njupt.edu.cn)
Source title:Frontiers of Optoelectronics
Abbreviated source title:Front. Optoelectron.
Issue date:2019
Publication year:2019
Language:English
ISSN:20952759
E-ISSN:20952767
Document type:Article in Press
Publisher:Higher Education Press
Abstract:Ion implantation has played a unique role in the fabrication of optical waveguide devices. Tb3+-doped aluminum borosilicate (TDAB) glass has been considered as an important magneto-optical material. In this work, near-infrared waveguides have been manufactured by the (5.5 + 6.0) MeV C3+ ion implantation with doses of (4.0 + 8.0) × 1013 ions·cm-2 in the TDAB glass. The modes propagated in the TDAB glass waveguide were recorded by a prism-coupling system. The finite-difference beam propagation method (FD-BPM) was carried out to simulate the guiding characteristics of the TDAB glass waveguide. The TDAB glass waveguide allows the light propagation with a single-mode at 1.539 μm and can serve as a potential candidate for future waveguide isolators.
? 2019, Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:27
Main heading:Borosilicate glass
Controlled terms:Aluminum compounds - Beam propagation method - Carbon - Infrared devices - Ion implantation - Ions - Optical waveguides - Waveguides
Uncontrolled terms:Finite-difference beam propagation method - Glass waveguides - Magneto-optical materials - Near Infrared - Optical waveguide device - Prism couplings - Single mode
Classification code:711 Electromagnetic Waves - 714.3 Waveguides - 741 Light, Optics and Optical Devices - 804 Chemical Products Generally - 812.3 Glass - 921 Mathematics
Numerical data indexing:Size 1.54e-06m
DOI:10.1007/s12200-019-0869-6

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706497348
Title:Design of wide-spectrum directed multispectral imaging system with visible light
Authors:Shan, Qiu-Sha (1); Liu, Kai (1); Yan, Pei-Pei (1); Duan, Jing (1); Jiang, Kai (1); Zhou, Liang (1)
Author affiliation:(1) Photoelectric Measurement and Control Technology Research Department, Xi'An Institute of Optics and Precision Mechanics of CAS, 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:10840
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Issue date:2019
Publication year:2019
Article number:108401A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623224
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144711
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:In this paper, a visible spectral multi-spectral imaging system with spectral resolution better than 14nm is designed. The system uses dual Amici dispersive prisms as the optical splitters to provide the parallel beam dispersion with the widen spectral range. When designed, the fore-Telescope?€collimating lens and imaging objective lens adopt telecentric structure to facilitate pupil matching, and the directed characters of dual Amici prisms make the coaxial design realized. The spectral range is 400nm-900nm, the relative aperture is 1/2.4, the optical design software CodeV is used for ray tracing and optimization of the spectral imaging system, and the design results are analyzed. The analysis result show that the optical modulate transfer function has reached 0.75 or more in each spectral segment of the optical system, the spectral resolution is better than 14nm, the smile and keystone are better than 5um, meeting the design requirements. The system has the features of widen spectral range, the smaller of the smile and keystone.
? 2019 SPIE.
Number of references:7
Main heading:Optical beam splitters
Controlled terms:Arches - Image resolution - Imaging systems - Light - Manufacture - Nanophotonics - Optical design - Optical systems - Overhead lines - Prisms - Spectral resolution - Spectroscopy
Uncontrolled terms:Keystone - Modulate transfer function - Multi-spectral imaging systems - Optical-design software - Pupil matching - Smile - Spectral imaging system - Spectral range
Classification code:408.2 Structural Members and Shapes - 537.1 Heat Treatment Processes - 706.2 Electric Power Lines and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques
Numerical data indexing:Size 1.40e-08m, Size 4.00e-07m to 9.00e-07m
DOI:10.1117/12.2513372

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507359745
Title:Extended kalman predictive filter and its application in theodolite system
Authors:Changming, Lu (1, 3); Xin, Gao (1); Zhiguo, Li (2); Meilin, Xie (2, 3); Yu, Cao (2, 3); Wei, Huang (2); Xuezhen, Lian (2); Zhe, Li (2)
Author affiliation:(1) Beijing Institute of Tracking and Communication Technology, Beijing; 100094, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi Province; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100190, China
Corresponding author:Xin, Gao(13911522304@139.com)
Source title:ICEIEC 2019 - Proceedings of 2019 IEEE 9th International Conference on Electronics Information and Emergency Communication
Abbreviated source title:ICEIEC - Proc. IEEE Int. Conf. Electron. Inf. Emerg. Commun.
Part number:1 of 1
Issue title:ICEIEC 2019 - Proceedings of 2019 IEEE 9th International Conference on Electronics Information and Emergency Communication
Issue date:July 2019
Publication year:2019
Pages:455-460
Article number:8784599
Language:English
ISBN-13:9781728111896
Document type:Conference article (CA)
Conference name:9th IEEE International Conference on Electronics Information and Emergency Communication, ICEIEC 2019
Conference date:July 12, 2019 - July 14, 2019
Conference location:Beijing, China
Conference code:150453
Sponsor:IEEE Beijing Section; Institute of Electrical and Electronics Engineers
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Tracking accuracy and pointing accuracy are the core indicators of photoelectric theodolite, and the speed stationarity in the process of tracking and pointing determines the quality of target image acquisition, affects the parameters acquisition and technical and tactical indicators judgment of the target under test[2]. In order to improve the tracking accuracy, pointing accuracy and speed stability of the photoelectric theodolite in the shooting range, the prediction algorithm based on extended kalman filter (EKF) to compensate the sensor delay and the extraction speed method of the tracking differentiator are proposed in the shooting range maneuvering measurement environment. First, the EKF algorithm is analyzed and the EKF-based pointing model is established. Then, in the velocity loop of the theodolite servo control system, the tracking differentiator is used to process the Angle information of the encoder as velocity feedback[3]. Finally, the method proposed in this paper is introduced into Simulink simulation. The results show that the method in this paper improves the speed stability, tracking and pointing accuracy of the photoelectric theodolite, and meets the application requirements of the range. This method can also be transplanted to other photoelectric equipment[1].
? 2019 IEEE.
Number of references:7
Main heading:Extended Kalman filters
Controlled terms:Photoelectricity - Speed
Uncontrolled terms:Extended Kalman filtering - Speed stability - Theodolite - Tracking accuracy - Tracking differentiators
Classification code:701.1 Electricity: Basic Concepts and Phenomena
DOI:10.1109/ICEIEC.2019.8784599

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507359917
Title:Design and implementation of real-time intersection simulation for optoelectronic equipment
Authors:CHEn, Yan (1); Zhang, Zhixiang (1); Zhou, Xin (1); Jin, Humin (2); Zhang, Mingmei (1)
Author affiliation:(1) Northwest Institute of Nuclear Technology, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China
Source title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Abbreviated source title:Proc. IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf., ITAIC
Part number:1 of 1
Issue title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Issue date:May 2019
Publication year:2019
Pages:1465-1469
Article number:8785504
Language:English
ISBN-13:9781538681787
Document type:Conference article (CA)
Conference name:8th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Conference date:May 24, 2019 - May 26, 2019
Conference location:Chongqing, China
Conference code:150447
Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Chongqing University of Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:As an important application of TTC equipment, it's difficult to design and realize the real-time intersection of angular data from photoelectric theodolites for acquiring target's position. It's necessary to build a simulation environment while developing intersection software for future practicability, and the simulation procedure should be based on the real treatment scheme of TTC data. A photoelectric theodolite real-time intersection simulation system is developed in this paper, with details about designing and building. This system can simulate ballistic trajectory data, photoelectric theodolite measuring data and run real-time intersection functions for calculating target positions, which depicts the whole procedure of photoelectric theodolite intersection in. Especially, a new treatment scheme of intersection data was provided, so the real-time intersection software could adaptively match angular data with intersection number for using the data at best. The system was proved to be efficient and approximated to the real condition, and the intersection software satisfied the need of real-time intersection.
? 2019 IEEE.
Number of references:10
Main heading:Photoelectricity
Controlled terms:Artificial intelligence - Ballistics - Computer software - Optical data processing - Trajectories
Uncontrolled terms:Ballistic trajectories - Design and implementations - Intersection number - Optical measurement - Photoelectric theodolite - Simulation - Simulation environment - Simulation procedures
Classification code:404.1 Military Engineering - 701.1 Electricity: Basic Concepts and Phenomena - 723 Computer Software, Data Handling and Applications
DOI:10.1109/ITAIC.2019.8785504

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507360286
Title:Research on two-dimensional turntable tracking and aiming system based on BLDC speed regulation system
Authors:Cao, Yu (1, 2, 3); Wang, Haitao (1); Jing, Feng (1, 2); Han, Junfeng (1); Xie, Meilin (1, 2)
Author affiliation:(1) Photoelectric Tracking xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi; 030006, China
Source title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Abbreviated source title:Proc. IEEE Jt. Int. Inf. Technol. Artif. Intell. Conf., ITAIC
Part number:1 of 1
Issue title:Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Issue date:May 2019
Publication year:2019
Pages:1452-1456
Article number:8785734
Language:English
ISBN-13:9781538681787
Document type:Conference article (CA)
Conference name:8th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019
Conference date:May 24, 2019 - May 26, 2019
Conference location:Chongqing, China
Conference code:150447
Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Chongqing University of Technology; IEEE Beijing Section
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper analyzes the commutation process of brushless dc motor, the control structure, control chip, control technology and control strategy of the system are also determined. In order to improve the system speed performance, the three closed-loop structure of position, speed and current is adopted in the control structure. Most functions of the system are realized by more reasonable software, therefore system reliability will be improved. In view of the problems of classical PID algorithm in brushless dc motor speed, the integral separation PID control algorithm is adoptedand successfully applied to this design. Aiming at BLDC turntable PWM mode is used, the hardware and software design with DSP+FPGA as the control core is completed. The performance of the whole design is validated by relying on the indoor experimental platform. The sketchy tracking accuracy of the system reaches 41 μrad, which meets the system requirements. The debugging results show that the system has good dynamic and static function[1].
? 2019 IEEE.
Number of references:14
Main heading:Electric machine control
Controlled terms:Artificial intelligence - Brushless DC motors - Electric motors - Program debugging - Proportional control systems - Software design - Software reliability - Speed regulators - Three term control systems
Uncontrolled terms:BLDC - Closed-loop structures - Hardware and software designs - High precision tracking - Integral separation PID - Speed regulation system - Torque ripples - Two-dimensional turntables
Classification code:705.3 Electric Motors - 705.3.2 DC Motors - 723.1 Computer Programming - 723.4 Artificial Intelligence - 731.1 Control Systems - 731.2 Control System Applications - 732.1 Control Equipment
DOI:10.1109/ITAIC.2019.8785734

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407334319
Title:Graphene Oxide Waveguide and Micro-Ring Resonator Polarizers
Authors:Wu, Jiayang (1); Yang, Yunyi (1, 2); Qu, Yang (1); Xu, Xingyuan (1); Liang, Yao (1); Chu, Sai Tak (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Jia, Baohua (1, 2); Moss, David J. (1)
Author affiliation:(1) Center for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, 83 Tat Chee Avenue, 999077, 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) INRS-énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) ITMO University, St. Petersburg; 197101, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Corresponding author:Jia, Baohua(bjia@swin.edu.au)
Source title:Laser and Photonics Reviews
Abbreviated source title:Laser Photon. Rev.
Issue date:2019
Publication year:2019
Article number:1900056
Language:English
ISSN:18638880
E-ISSN:18638899
Document type:Article in Press
Publisher:Wiley-VCH Verlag
Abstract:Integrated waveguide polarizers and polarization-selective micro-ring resonators (MRRs) incorporated with graphene oxide (GO) films are experimentally demonstrated. CMOS-compatible doped silica waveguides and MRRs with both uniformly coated and patterned GO films are fabricated based on a large-area, transfer-free, layer-by-layer GO coating method that yields precise control of the film thickness. Photolithography and lift-off processes are used to achieve photolithographic patterning of GO films with precise control of the placement and coating length. Detailed measurements are performed to characterize the performance of the devices versus GO film thickness and coating length as a function of polarization, wavelength and power. A high polarization dependent loss of ≈53.8 dB is achieved for the waveguide coated with 2-mm-long patterned GO films. It is found that intrinsic film material loss anisotropy dominates the performance for less than 20 layers whereas polarization-dependent mode overlap dominates for thicker layers. For the MRRs, the GO coating length is reduced to 50 μm, yielding a ≈8.3 dB polarization extinction ratio between transverse electric (TE) and transverse magnetic (TM) resonances. These results offer interesting physical insights and trends of the layered GO films and demonstrate the effectiveness of introducing GO films into photonic-integrated devices to realize high-performance polarization selective components.
? 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Number of references:54
Main heading:Oxide films
Controlled terms:Anisotropy - Coatings - Film thickness - Graphene - Graphene oxide - Optical instruments - Optical resonators - Photonics - Polarization - Silica - Waveguides
Uncontrolled terms:Integrated photonics - Integrated waveguides - Material anisotropy - Photolithographic patterning - Photonic integrated devices - Polarization control - Polarization dependent loss - Polarization extinction ratio
Classification code:714.3 Waveguides - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally - 813.2 Coating Materials - 931.2 Physical Properties of Gases, Liquids and Solids - 941.3 Optical Instruments
DOI:10.1002/lpor.201900056

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192206993443
Title:Beam pointing analysis and a novel coarse pointing assembly design in space laser communication
Authors:Zhang, Fu rui (1, 2); Han, Jun-feng (1); Ruan, Ping (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:Zhang, Fu rui(jiffring@126.com)
Source title:Optik
Abbreviated source title:Optik
Volume:189
Issue date:July 2019
Publication year:2019
Pages:130-147
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Nowadays, Small satellites take with high precision and lightweight laser communication terminals become a hot research direction. In this work, factors affecting beam pointing performance have been studied and a novel coarse pointing assembly (CPA) is designed based on flexure technology. The beam pointing performance is influenced by three aspects: Rayleigh distribution pointing error composed of static bias error and dynamic jitter, coupled motion between optical terminal and satellite and point ahead angle. Based on beam pointing requirements, a novel 2-D spatial flexure parallel coarse pointing assembly is proposed. Firstly, the type synthesis of this mechanism is performed and the freedom is verified by screw method. Then the detailed structural design is given. The pivotal component-elliptic arc flexure hinge is optimized by genetic algorithm and its rotation accuracy is less than 10 um. A flexure rod is used in actuating legs which is made rigid by spatial pseudo-rigid body method in kinematic analysis process. Finally, both of forward kinematics and inverse kinematics have been mathematically analyzed and the virtual prototype simulation is performed in Adams. The rotational accuracy can reach to 3 μrad. The position, velocity and acceleration motion curves shown that the platform moves stable which means it's easy to control. This work provides a new idea for future design of space optical communication terminal.
? 2019 Elsevier GmbH
Number of references:35
Main heading:Optical communication
Controlled terms:Communication satellites - Genetic algorithms - Hinges - Inverse kinematics - Small satellites
Uncontrolled terms:Beam pointing - Flexible mechanisms - Kinematic Analysis - Laser communication terminals - Rayleigh distributions - Space laser communication - Space optical communication - Virtual prototype simulation
Classification code:655.2.1 Communication Satellites - 717.1 Optical Communication Systems - 931.1 Mechanics
DOI:10.1016/j.ijleo.2019.05.079
Funding details: Number: Y655811213, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funded by the Chinese academy of sciences, China, No: Y655811213.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607092268
Title:Design of mirror assembly and surface simulation for CPA
Authors:Xu, Guangzhou (1); Zhao, Xiaodong (1); Liu, Minxia (2); Liu, Ying (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'an Aeronautics Computing Technique Research Institute, AVIC, Xi'an; 710068, China; (3) Xi'an University of Post and Telecommunications, Xi'an; 710121, China
Corresponding author:Xu, Guangzhou
Source title:Optik
Abbreviated source title:Optik
Volume:192
Issue date:September 2019
Publication year:2019
Article number:162939
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Mirror assembly is the important front module for the coarse pointing element of satellite laser communication. The structural and environmental adaption of the mirror assembly has a great influence for the performance of the laser communication system. To solve the design problem of the mirror assembly, the design of SiC mirror assembly and surface simulation for CPA is researched. First, the lightweight structure of SiC mirror is designed. Besides, to reduce the influence for the mirror surface change caused by the mismatching of different linear expansion coefficient, the flexible supporting structure is designed to realize the connection between the mirror and supporting structure. Second, the high-precision algorithm based on discrete error elimination technique for surface parameter of mirror is proposed and the correctness of the algorithm is validated. The validation result demonstrated the precision of proposed algorithm is higher and can satisfy the engineering demands. At last, the surface data of finite element analysis for the SiC mirror is processed by the developed program with high-precision algorithm; the surface parameter of mirror is obtained under the loadcases with gravity and thermal deformation. Based on the calculation result of surface parameter, the structural design of mirror assembly for CPA is verified and the fundamental data is provided to revise the structural design parameter of the mirror. A new technical reference is presented for the supporting structure design of mirror and the simulation technique of optical surface.
? 2019 Elsevier GmbH
Number of references:8
Main heading:Laser mirrors
Controlled terms:Finite element method - Integrated optics - Optical links - Parameter estimation - Precision engineering - Silicon carbide - Silicon compounds
Uncontrolled terms:Linear expansion coefficient - Satellite laser communication - Simulation technique - Structural design parameters - Supporting structure - Surface parameter - Surface simulations - Thermal deformation
Classification code:717.1 Optical Communication Systems - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 921.6 Numerical Methods
DOI:10.1016/j.ijleo.2019.162939
Funding text:This study was supported by CAS "Light of West China" Program (No. XAB2017A10). In addition, many thanks to the listed reference authors and some anonymous researchers, their study inspire us and help us a lot to do this work.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006923842
Title:Multiferroic orders in 0.5BiFeO3–0.5Bi0·5K0·5TiO3
Authors:Wei, Yongxing (1); Bai, Chenxing (1); Zhu, Weitong (2); Jin, Changqing (1); Gao, Dong (3); Xu, Gang (1); Jian, Zengyun (1); Zeng, Yiming (4)
Author affiliation:(1) School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) Electronic Materials Research Lab, Key Laboratory of Ministry of Education and International Center for Dielectric Research, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, Guangdong Provincial Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou; 510006, China; (4) State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming; 650106, China
Corresponding author:Wei, Yongxing(weiyx1985@gmail.com)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:45
Issue:12
Issue date:15 August 2019
Publication year:2019
Pages:15725-15729
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:We report our studies on the multiferroic orders in 0.5BiFeO3–0.5Bi0·5K0·5TiO3 (0.5BF–0.5BT) in this paper. The XRD pattern in the powdered form suggests a pseudocubic phase on average, with a lattice parameter of ~3.9572 ?. However, the bulk sample shows a coexistence of pseudocubic and tetragonal phases. The dielectric anomaly is relaxor-like, with the Burns temperature (TB) of ~760 K. The remnant polarization (Pr, 4.02–4.25 μC/cm2) is nearly unchanged in the temperature range of 298 K and 398 K. In addition, the normalized strain coefficient (d × 33) increases on heating, from 100 pm/V at 298 K up to 240 pm/V at 453 K. On the other side, two anomalies were confirmed in the temperature dependence of the magnetic susceptibilities. The high-temperature anomaly is related to a transition between the antiferromagnetic and paramagnetic states around ~143 K. The low-temperature anomaly around ~5.5 K might hint the onset of the magnetic spin glass state. We believe that some common features should be present in (BixA1-x) (Fe0·5B0.5)O3 (A cations are not ferroelectric active while B cations are not magnetic active).
? 2019 Elsevier Ltd and Techna Group S.r.l.
Number of references:29
Main heading:Spin glass
Controlled terms:Antiferromagnetism - Ferroelectricity - Glass - Glass transition - Magnetic susceptibility - Positive ions - Temperature distribution
Uncontrolled terms:Antiferromagnetics - BiFeO3 - Double-site disordered - Ferroelectric relaxors - High-temperature anomalies - Low temperature anomaly - Remnant polarizations - Temperature dependence
Numerical data indexing:Temperature 2.98e+02K, Temperature 3.98e+02K, Temperature 4.53e+02K
DOI:10.1016/j.ceramint.2019.04.249
Funding details: Number: 2018JQ1092, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 11704301, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Xi’an Jiaotong University;
Funding text:This work was financially supported by National Natural Science Foundation of China (Project no. 11704301 ), Natural Science Basic Research Plan in Shaanxi Province of China (Program no. 2018JQ1092 ) and President’s Fund of Xi’an Technological University (Project no. XAGDXJJ18006 ). Appendix A

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106631916
Title:Mechanically tunable terahertz multi-band bandstop filter based on near field coupling of metamaterials
Authors:Wang, Yue'E (1, 2); Li, Zhi (1, 2, 3); Li, Dongxia (2); Hu, Fangrong (2); Zhang, Wentao (2); Han, Jiaguang (4)
Author affiliation:(1) School of Mechano-Electronic Engineering, Xidian University, Xi'an; 710071, China; (2) Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin, GUANGXI; 541004, China; (3) Guilin University of Aerospace Technology, Guilin, GUANGXI; 541004, China; (4) College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin; 300072, China
Corresponding author:Li, Zhi(cclizhi@guet.edu.cn)
Source title:Materials Research Express
Abbreviated source title:Mater. Res. Express
Volume:6
Issue:5
Issue date:2019
Publication year:2019
Article number:055810
Language:English
E-ISSN:20531591
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We experimentally present a mechanically tunable multiband terahertz (THz) bandstop filter based on near field coupling of metamaterials. The unit cell of the device consists of an outside aluminum hexagon ring and an inner aluminum circle on high resistance silicon substrate. Two rings are asymmetrically split at the same position deviating from the center of the unit cell. Initially, the device has four resonance absorption peaks at 0.46 THz, 0.57 THz, 0.66 THz and 0.90 THz, respectively. When the azimuth increases from 0° to 90°, the transmission amplitude at these four absorption peaks can be simultaneously modulated. While, the absorption peak at 0.90 THz shows evident blue shift. The effects of geometric parameters on the tunability of bandstop filter are investigated using the finite-difference time-domain (FDTD) method. The sample is fabricated using a surface micromachining process and characterized using a THz time domain spectroscopy (TDS) system. The experiment is in good agreement with the simulation, and the measured amplitude modulation depth exceeds 12 dB at every resonance frequency. The proposed tunable THz filter can be applied in many fields, such as THz communications, sensing and multi-frequency switching.
? 2019 IOP Publishing Ltd.
Number of references:36
Main heading:Notch filters
Controlled terms:Aluminum - Blue shift - Finite difference time domain method - Metamaterials - Surface micromachining - Terahertz spectroscopy - Time domain analysis
Uncontrolled terms:Multiband - Near-field coupling - Resonance frequencies - Surface micromachining process - Tera Hertz - THz time domain spectroscopy - Transmission amplitude - Tunable bandstop filters
Classification code:541.1 Aluminum - 703.2 Electric Filters - 761 Nanotechnology - 921 Mathematics - 931.1 Mechanics - 951 Materials Science
Numerical data indexing:Decibel 1.20e+01dB, Frequency 4.60e+11Hz, Frequency 5.70e+11Hz, Frequency 6.60e+11Hz, Frequency 9.00e+11Hz
DOI:10.1088/2053-1591/ab06e3
Funding details: Number: 11574059, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 11774288, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61565004, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This research is supported by the National Natural Science Foundation of China (11574059, 61565004, 11774288), the Natural Science Foundation of Guangxi (2015GXNSFDA19039 and 2014GXNSFAA118376), and partly supported by the foundation from Guangxi Key Laboratory of Automatic Detection Technology and Instrument (YQ14114 and YQ16101).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007231091
Title:Semantic Descriptions of High-Resolution Remote Sensing Images
Authors:Wang, Binqiang (1, 2); Lu, Xiaoqiang (1); Zheng, Xiangtao (1); Li, Xuelong (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:16
Issue:8
Issue date:August 2019
Publication year:2019
Pages:1274-1278
Article number:8633358
Language:English
ISSN:1545598X
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Image captioning has attracted more and more attention in remote sensing filed since it provides more specific information than traditional tasks, such as classification. Though image captioning has gained some developments in recent years, it is difficult to describe the image in one simple sentence. To relieve the limitation, a novel captioning task is proposed and a novel framework is proposed to solve the novel task. The proposed framework uses semantic embedding to measure the image representation and the sentence representation. The captioning performance is improved by a proposed sentence representation (collective representation). Experimental results and human evaluations on three captioning data sets in remote sensing field demonstrate that the proposed framework can lead to advancement in image captioning results.
? 2019 IEEE.
Number of references:14
Main heading:Remote sensing
Controlled terms:Classification (of information) - Semantics
Uncontrolled terms:High resolution remote sensing images - Human evaluation - Image captioning - Image representations - Semantic descriptions - Semantic embedding - Semantic understanding - Specific information
Classification code:716.1 Information Theory and Signal Processing
DOI:10.1109/LGRS.2019.2893772
Funding details: Number: 61772510, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61806193, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: SKLST2017010, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61806193, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26, and in part by the Xi'an Post-Doctoral Innovation Base Scientific Research Project.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432459
Title:Curing shrinkage stress and deformation analysis of adhesive bonding large aperture mirror
Authors:Sun, Li-Jun (1); Li, Li-Bo (1); Li, Si-Yuan (1); Zhao, Qiang (1); Sun, Jian (1); Wu, Jun-Qiang (1); Hu, Bing-Liang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, 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:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The influence of adhesive bonding and curing on the accuracy of mirror surface shape was analyzed to realize low-stress assembly of large aperture mirror. Firstly, based on Hooke's law, a curing shrinkage stress equation was deduced, taking deformation of the mirror and support structure into account under the boundary condition of continuous edge bond, and key parameters effecting mirror deformation were obtained. Secondly, for a 514mm ULE spectrometer primary mirror with an inserts structure mosaiced and bonded on mirror-back, an equivalent linear expansion coefficient method was used for finite element modeling. The shrinkage stress at the bond edge of mirror and the mirror surface shape were analyzed. It's found that adhesive shrinkage has a significant effect on the mirror surface shape. Finally, the inserts structure of mirror assembly was optimized. In contrast to the non-optimum structure, the average stress of adhesive surface caused by adhesive curing shrinkage reduced from 0.28MPa to 0.18MPa, and the mirror surface shape (Root Mean Square, RMS) reduced from 0.029λ to 0.017λ. Finite element analysis results of the mirror assembly were given at last, surface shape accuracy (RMS) of mirror is 0.012λ under a load case of 1g gravity, and the first-order natural frequency of the component is 216 Hz. The obtained results showed that a suitable optimized support structure can effectively relieve adhesive curing stress, and also satisfy the design requirements for both the static and dynamic stiffness.
? 2019 SPIE.
Number of references:18
Main heading:Optical testing
Controlled terms:Adhesives - Curing - Deformation - Finite element method - Ground supports - Manufacture - Mirrors - Shrinkage - Structural optimization - Telescopes
Uncontrolled terms:Adhesive bonding - Adhesive shrinkage - Curing shrinkage - First order natural frequency - Large-aperture mirrors - optimize - Static and dynamic stiffness - Support structures
Classification code:537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 921.5 Optimization Techniques - 921.6 Numerical Methods - 951 Materials Science
Numerical data indexing:Frequency 2.16e+02Hz, Mass 1.00e-03kg, Pressure 2.80e+05Pa to 1.80e+05Pa, Size 5.14e-01m
DOI:10.1117/12.2505710

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184105911357
Title:Multi-component yttrium aluminosilicate (YAS) fiber prepared by melt-in-tube method for stable single-frequency laser
Authors:Zhang, Yeming (1); Wang, Weiwei (1); Li, Jiang (2); Xiao, Xusheng (3); Ma, Zhijun (1); Guo, Haitao (3); Dong, Guoping (1); Xu, Shanhui (1); Qiu, Jianrong (1, 4)
Author affiliation:(1) State Key Laboratory of Luminescent Materials and Devices, and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, China; (2) Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, China
Corresponding author:Qiu, Jianrong(qjr@scut.edu.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Volume:102
Issue:5
Issue date:May 2019
Publication year:2019
Pages:2551-2557
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:Blackwell Publishing Inc.
Abstract:The multi-component glass fibers have demonstrated their unique advantages in the application of single-frequency lasers due to their higher solubility of rare-earth ions and thus a higher gain per unit length in a compact fiber laser cavity. In this study, multi-component yttrium aluminosilicate (YAS) fiber with high doping concentration of Yb3+ was prepared by the “melt-in-tube” (MIT) method. A unit-length gain of 3 dB/cm was obtained in a 4.4 cm-long YAS fiber, the laser output slope efficiency reached 23.8% in a 10 cm-long Yb:YAS fiber. Single-frequency laser operation was achieved in a 1.7-cm-long Yb:YAS active fiber. To the best of our knowledge, this is the first demonstration of single-frequency laser with this YAS glass fiber as gain medium. The novel multi-component YAS fiber can be applied as a new gain material to realize single-frequency fiber laser.
? 2018 The American Ceramic Society
Number of references:30
Main heading:Yttrium compounds
Controlled terms:Aluminosilicates - Fiber lasers - Glass fibers - Metal ions - Rare earths
Uncontrolled terms:Doping concentration - Gain per unit length - Multicomponent glass - Multicomponents - Rare earth ions - Single frequency fiber lasers - Single frequency laser - Slope efficiencies
Numerical data indexing:Percentage 2.38e+01%
DOI:10.1111/jace.16072
Funding details: Number: 201610010119, Acronym: -, Sponsor: Pearl River S and T Nova Program of Guangzhou;Number: S2014A030306045, Acronym: -, Sponsor: Foundation for Distinguished Young Talents in Higher Education of Guangdong;Number: 2017A010103037, Acronym: -, Sponsor: Science and Technology Planning Project of Guangdong Province;Number: 51472091, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Science and Technology Project of Guangdong Province, Grant/Award Number: 2017A010103037; Pearl River S&T Nova Program of Guangzhou, Grant/ Award Number: No. 201610010119; Guangdong Natural Science Foundation for Distinguished Young Scholars, Grant/ Award Number: S2014A030306045; National Natural Science Foundation of China, Grant/Award Number: No. 51472091, No. 51772101, No. 61475047

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190906560873
Title:Method of encapsulating silver nanodots using porous glass and its application in Qswitched all solid-state laser
Authors:Zhang, Guodong (1, 2); Li, Guangying (1, 2); Zhang, Yunjie (3); Wang, Xu (1, 2); Cheng, Guanghua (1)
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 Science, Xi'An Polytechnic University, Xi'an; 710600, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:4
Issue date:2019
Publication year:2019
Pages:5337-5345
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Here, we report on a packaging method for silver nanodots (SNDs) by using highsilicate porous glass. Millions of nanopores, which are randomly distributed in porous glass, are used as cells for SND nucleation and growth during the initial chemical-reduction process. Then, the sample is annealed at a high-temperature in a reducing atmosphere to impel the further SND growth and nanopore collapse. The compact SND-embedded transparent glass is synthesized in the end. Morphology characterization shows that the SNDs that are encapsulated in the sample have a uniform size of 1.5 to 4.5 nm. Both the sample's saturable and reverse saturable absorptions are observed under the irradiation of 100 fs laser pulses at 800 nm. Saturable absorption's threshhold is characterized to be 1.4 × 1011 W/cm2, which is much lower than what was ever reported. Furthermore, the SNDs-embedded silica as a saturable absorber (SA) has been demonstrated in the Q-switched Nd:YVO4 laser. The pulse duration as short as 53 nanoseconds is obtained. To our knowledge, it is the first time that SNDs are used as a SA in the passively Q-switched all solid-state laser.
? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Number of references:30
Main heading:Solid state lasers
Controlled terms:Glass - Nanodots - Nanopores - Q switching - Saturable absorbers - Semiconductor quantum wells - Silica - Silver
Uncontrolled terms:All solid-state lasers - Morphology characterizations - Nucleation and growth - Passively Q-switched - Randomly distributed - Reducing atmosphere - Reverse saturable absorption - Saturable absorption
Classification code:547.1 Precious Metals - 714.2 Semiconductor Devices and Integrated Circuits - 744 Lasers - 761 Nanotechnology - 812.3 Glass - 933 Solid State Physics
Numerical data indexing:Size 1.50e-09m to 4.50e-09m, Size 8.00e-07m, Time 1.00e-13s, Time 5.30e-08s
DOI:10.1364/OE.27.005337
Funding details: Number: 2018YFB1107401, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61775236, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61775236); National Key Research and Development Program (2018YFB1107401).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707135149
Title:Microwave and communications applications of microcombs
Authors:Xu, Xingyuan (1); Wu, Jiayang (1); Tan, Mengxi (1); Nguyen, Thach (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3000, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Hong Kong, Hong Kong; (4) Xi’an Institute of Optics and Precision Mechanics Precision Mechanics, CAS Xi’an China, China; (5) INRS –énergie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Volume:Part F127-CLEO_AT 2019
Part number:1 of 1
Issue title:CLEO: Applications and Technology, CLEO_AT 2019
Issue date:2019
Publication year:2019
Report number:ATh4I.1
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:CLEO: Applications and Technology, CLEO_AT 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:141078
Publisher:OSA - The Optical Society
Abstract:We review our recent work in the use of integrated micro-resonator based optical frequency comb sources as the basis for transversal filtering functions for microwave and radio frequency photonic filtering and advanced functions. We demonstrate a range of novel functions including a Hilbert Transform, first, second and third order RF differentiation, true time delays, an RF channelizer and other functions.
? 2019 The Author(s)
Number of references:44
Main heading:Microwave resonators
Controlled terms:Mathematical transformations - Microelectromechanical devices
Uncontrolled terms:Advanced functions - Communications applications - Filtering functions - Hilbert transform - Micro resonators - Novel functions - Optical frequency comb sources - Radio frequency photonics
Classification code:714 Electronic Components and Tubes - 921.3 Mathematical Transformations
DOI:10.1364/CLEO_AT.2019.ATh4I.1

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192807177768
Title:A Filamentary Plasma Jet Generated by Argon Dielectric-Barrier Discharge in Ambient Air
Authors:Li, Jing (1, 2, 3); Lei, Bingying (1, 2); Wang, Jing (1, 2); Zhang, Tongyi (1, 2); Tang, Jie (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Duan, Yixiang (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 (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, Huai'an; 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:IEEE Transactions on Plasma Science
Abbreviated source title:IEEE Trans Plasma Sci
Volume:47
Issue:7
Issue date:July 2019
Publication year:2019
Pages:3134-3140
Article number:8727751
Language:English
ISSN:00933813
CODEN:ITPSBD
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:A filamentary plasma jet was produced by a cylindrical dielectric-barrier discharge (DBD) equipped with a thin quartz tube. This plasma jet consists of many filaments, and the filaments bifurcate into thinner branches close to the ground electrode. Only a single filament is produced in each current pulse, and this filament is distorted in the long gas gap. The maximum electron density in the filament is on the order of 1015cm-3. Optical emission examination shows a decrease of optical emissions from OH and Ar but an increase of optical emissions from N2 along the plasma jet. The vapor in the working gas argon rather than in the ambient air dominates the optical emissions from the de-excitation of OH along the plasma jet. Near the ground electrode, the nitrogen emission spectra mainly resulted from the direct electron effect on the ground state or metastable nitrogen and the collisions between nitrogen metastables. The rotational temperature is lower than the vibrational temperature but much higher than the room temperature. This feature makes the filamentary plasma jet only suitable for processing samples bearing high temperature.
? 1973-2012 IEEE.
Number of references:39
Main heading:Plasma jets
Controlled terms:Argon - Dielectric devices - Dielectric materials - Electric discharges - Emission spectroscopy - Flow control - Gas emissions - Ground state - Grounding electrodes - Light emission
Uncontrolled terms:Cylindrical dielectric barrier discharges - Dielectric barrier discharges - Filamentary discharges - Nitrogen emissions - Optical emission spectra - Rotational temperature - Vibrational temperature - Working gas argons
Classification code:631.1 Fluid Flow, General - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 741.1 Light/Optics - 804 Chemical Products Generally - 932.3 Plasma Physics
DOI:10.1109/TPS.2019.2916187
Funding details: Number: 51877210, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475191, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61875228, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 51877210, Grant 61875228, and Grant 61475191, in part by the CAS "Light of West China" Program under Grant XAB2015A08, in part by the Natural Science Foundation of Shaanxi Province, China, under Grant 2017ZDJC-27, and in part by the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, under Grant LSIT201807G.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190906559203
Title:Co-occurrence matching of local binary patterns for improving visual adaption and its application to smoke recognition
Authors:Yuan, Feiniu (1, 2); Shi, Jinting (3); Xia, Xue (2); Huang, Qinghua (4); Li, Xuelong (5)
Author affiliation:(1) College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai; 201418, China; (2) School of Information Technology, Jiangxi University of Finance and Economics, Nanchang; 330032, China; (3) Vocational School of Teachers and Technology, Jiangxi Agricultural University, Nanchang; 330045, China; (4) School of Mechanical Engineering, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an, Shanxi; 710072, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Huang, Qinghua(enicarwhw@qq.com)
Source title:IET Computer Vision
Abbreviated source title:IET Comput. Vision
Volume:13
Issue:2
Issue date:March 1, 2019
Publication year:2019
Pages:178-187
Language:English
ISSN:17519632
E-ISSN:17519640
Document type:Journal article (JA)
Publisher:Institution of Engineering and Technology
Abstract:It is challenging to recognize smoke from visual scenes due to large variations of smoke colors, textures and shapes. To improve robustness, we propose a novel feature extraction method based on similarity and dissimilarity matching measures of Local Binary Patterns (LBP). Given two bit-sequences of an LBP code pair, the similarity and dissimilarity matching measures are defined as the ratios of the 1-1 bitwise matching number to the 0-0 bitwise matching number and the 1-0 number to the 0-1 number, respectively. To capture local code variations, we calculate the measures between LBP codes of a center pixel and its neighbors. Then we compare each measure with its global mean to propose Similarity Matching based Local Binary Patterns (SMLBP) and Dissimilarity Matching based Local Binary Patterns (DMLBP). Since SMLBP and DMLBP extract spatial variations of the 1st order LBP codes, they actually represent the 2nd order variations of pixel values. Furthermore, we adopt different mapping modes and multi-scale neighborhoods to obtain rotation and scale invariances. Finally, we concatenate the histograms of LBP, SMLBP and DMLBP to generate a feature vector containing 1st and 2nd order information. Experiments show that our method obviously outperforms existing methods.
? The Institution of Engineering and Technology 2018.
Number of references:72
Main heading:Smoke
Controlled terms:Codes (symbols) - Pixels - Textures
Uncontrolled terms:Feature extraction methods - Local binary patterns - Matching numbers - Ordering variations - Scale invariance - Similarity-matching - Spatial variations - Visual adaptions
Classification code:723.2 Data Processing and Image Processing
DOI:10.1049/iet-cvi.2018.5164
Funding details: Number: 20142BCB23014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2015ZBBE50013, Acronym: -, Sponsor: Science and Technology Support Program of Jiangsu Province;Number: 61571193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61862029, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJ170317, Acronym: -, Sponsor: Zhejiang Province Public Welfare Technology Application Research Project;Number: KJLD12066, Acronym: -, Sponsor: Zhejiang Province Public Welfare Technology Application Research Project;
Funding text:This work was partially supported by National Natural Science Foundation of China (grant nos. 61862029 and 61571193), Cultivated Talent Program for Young Scientists of Jiangxi Province (grant no. 20142BCB23014), Key Technology R&D Program of Jiangxi Province (grant no. 2015ZBBE50013) and Science Technology Application Project of Jiangxi Province (grant nos. KJLD12066, GJJ170317), Natural Science Foundation of Guangdong, China (grant no. 2017A030312006), and Project of Science and Technology Department of Guangdong province (grant no. 2016A010101021, 2016A010101022 and 2016A010101023), and Science and Technology Program of Guangzhou (grant no. 201704020134).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107261607
Title:Signal enhancement of laser-induced breakdown spectroscopy on non-flat samples by single beam splitting
Authors:Lei, Bingying (1, 2); Wang, Jing (1, 2); Li, Jing (1, 2); Tang, Jie (1); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Duan, Yixiang (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics of CAS, Xinxi Road 17, Xi’an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Sciences, Yuquan Road 19, Beijing; 100049, China; (3) Research Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Wangjiang Road 29, Chengdu; 610065, China
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:15
Issue date:July 22, 2019
Publication year:2019
Pages:20541-20557
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A single-beam-splitting approach was employed to enhance the signal intensity of LIBS under the extreme condition of laser beam grazing the surface of non-flat samples. Examining the time-integrated emission spectra shows that ISplit ISingle enhancement factors of 2.5 and 3.5 were achieved at the laser energy of 33 mJ for aluminium alloy and brass, respectively. This factor first increases, reaches its maximum at 33 mJ, and drops gradually with the laser energy further increased. The mechanisms behind the enhanced optical emission and the enhancement factor evolution are discussed by using the proposed laser ablation model and laser-supported detonation (LSD) wave model, respectively. Examining the time-resolved emission spectra show that enhancement effect exists across all the plasma expansion process and the split beam mode allows for a longer plasma lifetime. A remarkable feature is that the trailing phenomenon emerging in the single beam mode vanishes due to the interaction between the plasmas generated by the grazing incident and normally incident laser beams in the split beam mode. The underlying cause is probably that the plasma plume produced by the normally incident laser beam prevents the grazing incident laser beam from further propagating and ablating the sample surface below. These findings not only give an insight into the plasma generation and evolution at grazing incidence of laser beam on sample surface but also provide a more reliable method for outdoor LIBS measurement of irregular samples.
? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Number of references:38
Main heading:Laser beams
Controlled terms:Atomic emission spectroscopy - Laser ablation - Plasma diagnostics
Uncontrolled terms:Enhancement effects - Enhancement factor - Extreme conditions - Laser-supported detonations - Signal enhancement - Signal intensities - Time integrated emission spectra - Time-resolved emission spectra
Classification code:744.8 Laser Beam Interactions - 932.3 Plasma Physics
Numerical data indexing:Energy 3.30e-02J
DOI:10.1364/OE.27.020541
Funding details: Number: 51877210, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475191, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61875228, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2015A08, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:National Natural Science Foundation of China (51877210, 61475191, 61875228); Chinese Academy of Sciences (CAS) "Light of West China" Program (XAB2015A08); the Open Research Fund of Key Laboratory of Spectral Imaging Technology, CAS (LSIT201807G).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106619862
Title:Noise-resistant matching algorithm integrating regional information for low-light stereo vision
Authors:Feng, Huahui (1, 2); Zhang, Geng (1); Hu, Bingliang (1); Zhang, Xin (1); Li, Siyuan (1, 2, 3)
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Jiaotong University, Xi'an, China
Corresponding author:Li, Siyuan(lsy@opt.ac.cn)
Source title:Journal of Electronic Imaging
Abbreviated source title:J. Electron. Imaging
Volume:28
Issue:1
Issue date:January 1, 2019
Publication year:2019
Article number:013050
Language:English
ISSN:10179909
E-ISSN:1560229X
CODEN:JEIME5
Document type:Journal article (JA)
Publisher:SPIE
Abstract:Low-light stereo vision is a challenging problem because images captured in dark environment usually suffer from strong random noises. Some widely adopted algorithms, such as semiglobal matching, mainly depend on pixel-level information. The accuracy of local feature matching and disparity propagation decreases when pixels become noisy. Focusing on this problem, we proposed a matching algorithm that utilizes regional information to enhance the robustness to local noisy pixels. This algorithm is based on the framework of ADCensus feature and semiglobal matching. It extends the original algorithm in two ways. First, image segmentation information is added to solve the problem of incomplete path and improve the accuracy of cost calculation. Second, the matching cost volume is calculated with AD-SoftCensus measure that minimizes the impact of noise by changing the pattern of the census descriptor from binary to trinary. The robustness of the proposed algorithm is validated on Middlebury datasets, synthetic data, and real world data captured by a low-light camera in darkness. The results show that the proposed algorithm has better performance and higher matching rate among top-ranked algorithms on low signal-to-noise ratio data and high accuracy on the Middlebury benchmark datasets.
? 2019 SPIE and IS&T.
Number of references:20
Main heading:Stereo image processing
Controlled terms:Benchmarking - Image enhancement - Image segmentation - Pixels - Problem solving - Signal to noise ratio - Stereo vision
Uncontrolled terms:Low light - Low signal-to-noise ratio - Original algorithms - Random noise - Regional information - Segmentation informations - Semi-global matching - Stereo matching
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 723.5 Computer Applications
DOI:10.1117/1.JEI.28.1.013050
Funding details: Number: 61405239, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China, under Grant Nos. 61501456 and 61405239 and Chinese Academy of Defense Science and Technology Innovation Fund.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906869658
Title:Ultrabroadband mid-infrared emission from Cr2+-doped infrared transparent chalcogenide glass ceramics embedded with thermally grown ZnS nanorods
Authors:Lu, Xiaosong (1); Lai, Zhiqiang (1); Zhang, Runan (1); Guo, Haitao (2); Ren, Jing (1); Strizik, Lukas (3); Wagner, Tomas (3, 4); Farrell, Gerald (5); Wang, Pengfei (1, 6)
Author affiliation:(1) Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin; 150001, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and precision Mechanics, Chinese Academy of Science (CAS), Xi'an; Shaanxi; 710119, China; (3) Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice; 53210, Czech Republic; (4) Department of General and Inorganic Chemistry, Faculty of Chemical Technology and Center for Materials and Nanotechnologies, University of Pardubice, Studentska 573, Pardubice; 532 10, Czech Republic; (5) Photonics Research Centre, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland; (6) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China
Corresponding author:Ren, Jing(ren.jing@hrbeu.edu.cn)
Source title:Journal of the European Ceramic Society
Abbreviated source title:J. Eur. Ceram. Soc.
Volume:39
Issue:11
Issue date:September 2019
Publication year:2019
Pages:3373-3379
Language:English
ISSN:09552219
E-ISSN:1873619X
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:We report, for the first time to our knowledge, an ultrabroadband mid-infrared (MIR)emission in the range of 1800–2800 nm at room temperature from a Cr2+-doped chalcogenide glass ceramic embedded with pure hexagonal (wurtzite)β-ZnS nanorods and study the emission-dependent properties on the doping concentration of Cr2+. A new family of chalcogenide glasses based on (100 ? x)Ge1.5As2S6.5 – x ZnSe (in mol.%)was prepared by melt-quenching method. The Cr2+: β-ZnS nanorods of ?150 nm in diameter and ?1 μm in length were grown in the Cr2+-doped glass after thermal annealing. The compositional variations of glass structures and optical properties were studied. The crystalline phase, morphology of the thermally grown nanorods, and the microscopic elemental distributions were characterized using advanced nanoscale transmission electron microscopy analyses.
? 2019 Elsevier Ltd
Number of references:36
Main heading:Sulfur compounds
Controlled terms:Arsenic compounds - Chalcogenides - Germanium compounds - Glass ceramics - High resolution transmission electron microscopy - II-VI semiconductors - Infrared devices - Nanorods - Optical properties - Selenium compounds - Zinc sulfide
Uncontrolled terms:Chalcogenide glass - Chalcogenide glass ceramics - Compositional variation - Elemental distribution - Melt quenching method - Mid-infrared emission - Midinfrared - Transmission electron
DOI:10.1016/j.jeurceramsoc.2019.04.048
Funding details: Number: 2016YFE0126500, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 51872055, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61475189, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61575050, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: B13015, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: F2017006, Acronym: -, Sponsor: Natural Science Foundation of Heilongjiang Province;Number: HEUCFG201841, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This work was financial supported by National Key R&D Program of China (2016YFE0126500), National Natural Science Foundation of China (NSFC61575050, 51872055and61475189), the Fundamental Research Funds for the Central Universities (HEUCFG201841), Key Program for Natural Science Foundation of Heilongjiang Province of China (ZD2016012), the Open Fund of the State Key Laboratory on Integrated Optoelectronics (IOSKL2016KF03), Natural Science Foundation of Heilongjiang Province of China (F2017006), the 111 project (B13015) to the Harbin Engineering University, European Regional Development Fund-Project "High sensitive sensors and low density materials based on polymeric nanocomposites - NANOMAT (No. CZ.02.1.01/0.0/0.0/17_048/0007376)".

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106948766
Title:Enhanced four-wave mixing in hybrid integrated waveguides with graphene oxide
Authors:Wu, Jiayang (1); Yang, Yunyi (1); Xu, Xingyuan (1); Jia, Linnan (1); Liang, Yao (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5, 6); Jia, Baohua (1); Moss, David (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an, China; (4) INRS-énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC, Canada; (5) National Research University of Information Technologies Mechanics and Optics, St.-Petersburg, Russia; (6) University of Electronic Science and Technology of China, Chengdu; 610054, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10920
Part number:1 of 1
Issue title:2D Photonic Materials and Devices II
Issue date:2019
Publication year:2019
Article number:109200K
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510624825
Document type:Conference article (CA)
Conference name:2D Photonic Materials and Devices II 2019
Conference date:February 6, 2019 - February 7, 2019
Conference location:San Francisco, CA, United states
Conference code:147852
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:Owing to the ease of preparation as well as the tunability of its material properties, graphene oxide (GO) has become a rising star of the graphene family. In our previous work, we found that GO has an ultra-high Kerr nonlinear optical response - several orders of magnitude higher than that of silica and even silicon. Moreover, as compared with graphene, GO has much lower linear loss as well as nonlinear loss (two photon absorption (TPA)), arising from its large bandgap (2.4~3.1 eV) being more than double the photon energy in the telecommunications band. Here, we experimentally demonstrate enhanced four-wave mixing (FWM) in hybrid integrated waveguides coated with GO films. Owing to strong mode overlap between the integrated waveguides and the high Kerr nonlinearity GO films as well as low linear and nonlinear loss, we demonstrate significant enhancement in the FWM efficiency. We achieve up to ~9.5-dB enhancement in the conversion efficiency for a 1.5-cm-long waveguide with 2 layers of GO. We perform FWM measurements at different pump powers, wavelength detuning, GO film lengths and numbers of layers. The experimental results verify the effectiveness of introducing GO films into integrated photonic devices in order to enhance the performance of nonlinear optical processes.
? 2019 SPIE.
Number of references:44
Main heading:Optical films
Controlled terms:Four wave mixing - Graphene - Graphene oxide - Luminescence of organic solids - Photonic devices - Photonics - Photons - Silica - Two photon processes - Waveguides
Uncontrolled terms:Integrated photonic devices - Integrated photonics - Integrated waveguides - Nonlinear optical process - Nonlinear optical response - Orders of magnitude - Two photon absorption - Wavelength detuning
Classification code:714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids - 931.3 Atomic and Molecular Physics
DOI:10.1117/12.2508120
Funding details: Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program (No. DP150102972 and DP150104327). RM acknowledges support by Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program. He also acknowledges additional support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program (grant 074-U 01) and by the 1000 Talents Sichuan Program in China.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5673402
Title:Similarity Constrained Convex Nonnegative Matrix Factorization for Hyperspectral Anomaly Detection
Authors:Zhang, Wuxia (1, 2); Lu, Xiaoqiang (1); Li, Xuelong (3, 4)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xian Institute of Optics and Precision Mechanics, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China; (4) Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Li, Xuelong(xuelong_li@nwpu.edu.cn)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:7
Issue date:July 2019
Publication year:2019
Pages:4810-4822
Article number:8638856
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Hyperspectral anomaly detection is very important in the remote sensing domain. The representation-based anomaly method is one of the most important hyperspectral anomaly detection methods, which uses reconstruction errors (REs) to detect anomalies. REs are affected by the basis matrix and its corresponding coefficient matrix. Mixed pixels exist because of the low-spatial resolution of hyperspectral images. The RE is not large enough to correctly distinguish the pixel difficult to classify when the basis matrix is composed of pixels. Moreover, its corresponding coefficients cannot indicate whether pixels are pure or mixed and the abundances of mixed pixels. To address the above-mentioned problems, endmembers referring to pure or relatively pure spectral signatures are explored to build the basis matrix. The RE based on the basis matrix of endmembers is much larger for the anomalous pixel difficult to correctly classify. Furthermore, its corresponding coefficient matrix of endmembers has physical meanings. Hence, a novel hyperspectral anomaly detection based on similarity constrained convex nonnegative matrix factorization is proposed from the perspective of endmembers for the first time. First, convex nonnegative matrix factorization (CNMF) is employed to obtain endmembers of background. Then, CNMF is constrained by the similarity regularization that considers different contributions of endmembers to the pixel under test to acquire the more accurate and meaningful coefficient matrix. Finally, anomalies are detected by calculating REs. The proposed algorithm is verified on both simulated and real data sets. Experimental results show that our proposed algorithm outperforms other state-of-the-art algorithms.
? 1980-2012 IEEE.
Number of references:45
Controlled terms:algorithm - anomaly - detection method - matrix - pixel - remote sensing - spatial resolution
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2019.2893116
Funding details: Number: 61761130079, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61761130079, in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences, under Grant QYZDY-SSW-JSC044, in part by the National Natural Science Foundation of China under Grant 61772510, and in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183605778801
Title:The image stitching algorithm based on aggregated star groups
Authors:Qiu, Shi (1); Zhou, Dongmei (2); Du, Yun (1)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) College of Information Science and Technology, Chengdu University of Technology, Chengdu; 610059, China
Corresponding author:Zhou, Dongmei(zhoudm@cdut.edu.cn)
Source title:Signal, Image and Video Processing
Abbreviated source title:Signal Image Video Process.
Volume:13
Issue:2
Issue date:March 12, 2019
Publication year:2019
Pages:227-235
Language:English
ISSN:18631703
E-ISSN:18631711
Document type:Journal article (JA)
Publisher:Springer London
Abstract:The star map has the characteristics of large amount of data and wide angle of view. The star points are displayed as limited pixels on the image and easy to get disturbed by noise, so it is difficult to build a feature model to obtain the complete star map. In this paper, we have revised the OTSU algorithm and extracted the star points accurately according to the characteristics of star point pixels. We are inspired by the idea of compressed perception to break the local spatial relationship of stars, construct the aggregated star group model of relative relationship of local stars, realize the matching and construct the extended model to realize the stitching of wide angle star images. In order to meet the requirements of efficient transmission and storage in the air or on the ground, we have proposed the algorithm of star point storage and mapping. We set up a database with 600 frames of real star images from CCD camera and 600 frames of simulated star images, and the experiments show that our algorithm can compress the data and realize the star image stitching.
? 2018, Springer-Verlag London Ltd., part of Springer Nature.
Number of references:46
Main heading:Stars
Controlled terms:CCD cameras - Digital storage - Image processing - Pixels - Stitching (metal joining)
Uncontrolled terms:Extended model - Feature modeling - Group modeling - Image stitching - Matching - Otsu algorithm - Spatial relationships - The aggregated star groups
DOI:10.1007/s11760-018-1349-y
Funding details: Number: LSIT201717G, Acronym: -, Sponsor: -;Number: XAB2016B23, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:Acknowledgements This work is supported by Light of West China of Chinese Academy of Sciences (XAB2016B23). The Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (LSIT201717G).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430679
Title:Design of polarization imaging optical system with divided aperture
Authors:Ren, Zhi-Guang (2); Li, Xu-Yang (1); Ni, Dong-Wei (1); Yang, Ming-Yang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) Shaanxi Normal University, 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:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:108380Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:As a new kind of optical imaging technology, polarimetric imaging can be able to identify the target that may be difficult to conventional ones and can reduce the influence of stray and complex environment. It can efficiently increase the detection dimension of the information and increase capability of target imaging and recognition by imaging the polarization properties of the optical wave. The dissertation researches a type of simultaneous polarization imaging optical system with divided aperture. This system is adopted the identification system of polarization and morphological feature, which can improve the ability of space target classification and recognition. It also can be used as a space-based space target imaging system, which can be used for the classification and recognition of space target. Polarization optical system is adopted the structure mode of two-mirror reflecting systems and field correction mirror, pupil division and four zoning registration scheme of array CCD detector. The system technical parameters are F#/12.5, EFL 1500mm, FOV 0.47°. The size of CCD pixel is 12μm×12μm. The system can detect the light of 0°/45°/90° and visible light for 450-850 nm spectrum. It reached the conclusion that optical system imaging quality is close to the diffraction limit at the Nyquist frequency 41.70lp/mm though simulation test, the system can meet the imaging requirements.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:8
Main heading:Optical systems
Controlled terms:Diffraction - Light - Manufacture - Mirrors - Optical design - Polarization
Uncontrolled terms:Classification and recognition - Divided aperture - Full polarization - Morphological features - Optical imaging technology - Polarimetric imaging - Polarization properties - RC system
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 1.50e+00m, Size 4.50e-07m to 8.50e-07m
DOI:10.1117/12.2505016

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906879223
Title:Polarimetric imaging method for target enhancement in haze based on polarimetric retrieval
Authors:Zhang, Wenfei (1, 2); Liang, Jian (2); Xing, Fei (1); Man, Zhongsheng (1); Ge, Xiaolu (1); Fu, Shenggui (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, China; (2) Research Department of Information Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China
Corresponding author:Zhang, Wenfei(zhangwenfei@sdut.edu.cn)
Source title:Journal of Modern Optics
Abbreviated source title:J. Mod. Opt.
Volume:66
Issue:11
Issue date:June 25, 2019
Publication year:2019
Pages:1235-1243
Language:English
ISSN:09500340
E-ISSN:13623044
CODEN:JMOPEW
Document type:Journal article (JA)
Publisher:Taylor and Francis Ltd.
Abstract:Polarimetric imaging has been proven to be an effective way in detecting the targets of interest in complicated surroundings by analyzing the polarization property, instead of the intensity, of the light emanating from the objects. Unfortunately, polarimetric imaging encounters difficulty when the surroundings are very scattered, where on the one hand the polarization property of the object light usually becomes very faint after a strong depolarized scattering process; on the other hand, the object light will be blended with the atmospheric light scattered by haze particles (airlight). In this paper, we propose a polarimetric imaging retrieval method that can be used for such challenging conditions. Firstly, the airlight radiance is estimated precisely. Then, the airlight is removed from the hazy images. Finally, the residual polarization property of the object light is regained, which ensures the validity of the polarimetric imaging method in these conditions. The experiments confirm that the proposed method is useful in enhancing polarimetric imaging detection in haze.
? 2019, ? 2019 Informa UK Limited, trading as Taylor & Francis Group.
Number of references:26
Main heading:Polarimeters
Controlled terms:Image enhancement - Polarization
Uncontrolled terms:Imaging through turbid media - Light scattered - Polarimetric imaging - Polarization properties - Residual polarization - Retrieval methods - Scattering process - Targets of interest
DOI:10.1080/09500340.2019.1610520
Funding details: Number: 11604182, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11704226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by National Natural Science Foundation of China under [grant numbers 11604182 and 11704226].

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430693
Title:Design of improved K?hler illumination for full-field optical coherence tomography system
Authors:Yang, Fanfan (1, 2); Wang, Xingfeng (1, 2); Lei, Jiao (1, 2); Chen, Guoqing (1, 2); Yang, Jianfeng (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:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:108381E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:According to the characteristics of the reflective optical microscope lighting system, an improved K?hler illumination system for the full-field optical coherence tomography system (FFOCT) was designed to realize the illumination of biological samples and living biological tissues. The illumination system differs from the conventional K?hler illumination system. The filament of the halogen lamp is imaged on the back focal plane of the microscope objective, then parallel light is incident on the sample plane. The improved K?hler illumination system uses a halogen lamp as the light source and is divided into two parts: The condenser front and rear groups. The front condenser group uses two double-glued structures, and the rear group uses a double-coupled lens. The optical design software Zemax was used to optimize the design, and the illumination analysis software Tracepro was used to trace the ray and simulate the imaging of the light source in the front focal plane of the microscope objective. The entire improved K?hler illumination optical path has a total length of 594 mm, the diaphragm is 122 mm from the front group of the condenser, 99 mm from the rear group, and the working distance is 292 mm; the luminous efficiency of the receiving surface is as high as 60.38%, and the edge of the light spot is smooth and clear. The illumination system makes full use of the optical power emitted by the light source and facilitates the placement of a device such as a splitting prism between the condenser and the microscope objective, which satisfies the requirement of the entire machine well.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:15
Main heading:Microscopes
Controlled terms:Condensers (liquefiers) - Focusing - Light sources - Manufacture - Optical design - Optical tomography
Uncontrolled terms:Biological tissues - Full-field optical coherence tomographies - Illumination analysis - Illumination system - Light collector - Luminous efficiency - Microscope objective - Optical Design Software - Zemax
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Percentage 6.04e+01%, Size 1.22e-01m, Size 5.94e-01m, Size 9.90e-02m
DOI:10.1117/12.2506175

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20180704801860
Title:Histograms of Gaussian normal distribution for 3D feature matching in cluttered scenes
Authors:Zhou, Wei (1, 2, 3); Ma, Caiwen (1); Yao, Tong (1, 2); Chang, Peng (4); Zhang, Qi (2); Kuijper, Arjan (3)
Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Fraunhofer IGD, TU Darmstadt, Darmstadt; 64283, Germany; (4) Northeastern University, Boston; MA; 02115, United States
Corresponding author:Zhou, Wei(zhouwei1@opt.cn)
Source title:Visual Computer
Abbreviated source title:Visual Comput
Volume:35
Issue:4
Issue date:April 1, 2019
Publication year:2019
Pages:489-505
Language:English
ISSN:01782789
CODEN:VICOE5
Document type:Journal article (JA)
Publisher:Springer Verlag
Abstract:3D feature descriptors provide essential information to find given models in captured scenes. In practical applications, these scenes often contain clutter. This imposes severe challenges on the 3D object recognition leading to feature mismatches between scenes and models. As such errors are not fully addressed by the existing methods, 3D feature matching still remains a largely unsolved problem. We therefore propose our Histograms of Gaussian Normal Distribution (HGND) for capturing salient feature information on a local reference frame (LRF) that enables us to solve this problem. We define a LRF on each local surface patch by using the eigenvectors of the scatter matrix. Different from the traditional local LRF-based methods, our HGND descriptor is based on the combination of geometrical and spatial information without calculating the distribution of every point and its geometrical information in a local domain. This makes it both simple and efficient. We encode the HGND descriptors in a histogram by the geometrical projected distribution of the normal vectors. These vectors are based on the spatial distribution of the points. We use three public benchmarks, the Bologna, the UWA and the Ca’ Foscari Venezia dataset, to evaluate the speed, robustness, and descriptiveness of our approach. Our experiments demonstrate that the HGND is fast and obtains a more reliable matching rate than state-of-the-art approaches in cluttered situations.
? 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:61
Main heading:Graphic methods
Controlled terms:Geometry - Normal distribution - Object recognition
Uncontrolled terms:3d object recognition - Gaussian normal distribution - Geometrical informations - Local feature descriptor - Local references - Local surfaces - Point cloud - State-of-the-art approach
DOI:10.1007/s00371-018-1478-x
Funding details: Number: -, Acronym: -, Sponsor: University of Chinese Academy of Sciences;
Funding text:Acknowledgements This work was supported by the University of Chinese Academy of Sciences (UCAS) Joint PhD Training Program (UCAS[2015]37).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535043
Title:Thermal control design and analysis of a zoom TV optical mechanical system
Authors:Zhang, Yue (1); Shi, Kui (1); Wang, Huan (1); Zhang, Gaopeng (1, 2); Qu, Rui (1, 3); Zhang, Zhi (1); Gao, Bo (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'An Jiaotong University, Xi'an; 710049, China; (3) 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:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:In view of whether the optical system of a focal length 14~360mm continuous zoom TV can obtain high quality and high reliability images in high and low temperature environment, especially in extreme low temperature environment. The thermal design of zoom TV optical-mechanical system using passive thermal control and active thermal control is proposed. The passive thermal control uses polyimide as insulation material to increase the thermal resistance between the camera interior and the outside. Active thermal control uses electric heating film to dynamically heat the key parts of the camera lens. Under the condition of low temperature, the finite element method is used to establish the heat transfer model of the whole lens assembly in the workbench finite element software, and analyze the heat load composition, including the heating power load, the heat convection load and the heat radiation load, and carry on the steady state thermal analysis. Through thermodynamic analysis and experimental verification, the consistency of focal plane of zoom camera optical system is good after taking active thermal control measures at the extreme low temperature of-45°C. The optical transfer function (OTF) of zoom lens at cut-off frequency (100lp/mm) is 0.25 higher than that before thermal design, which can meet the requirements of thermal control design with better transfer function distribution and higher imaging quality. The correctness of the simulation results and the rationality of the optical-mechanical design are verified.
? 2019 SPIE.
Number of references:12
Main heading:Quality control
Controlled terms:Cameras - Distribution functions - Heat convection - Heat radiation - Lenses - Machine design - Mechanics - Optical systems - Optical transfer function - Photonics - Thermal insulation - Thermal load - Thermal variables control - Thermoanalysis - Transfer functions
Uncontrolled terms:Active thermal control - Experimental verification - Finite element software - Insulation materials - Low temperature environment - Steady-state thermal analysis - Thermal control - Thermo dynamic analysis
Classification code:413.2 Heat Insulating Materials - 601 Mechanical Design - 641.2 Heat Transfer - 731.3 Specific Variables Control - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 801 Chemistry - 913.3 Quality Assurance and Control - 921 Mathematics - 922.1 Probability Theory - 931.1 Mechanics
DOI:10.1117/12.2521772

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706497365
Title:Athermal design of refractive/diffractive hybrid infrared optical system with large relative aperture
Authors:Jiang, Yanru (1, 2); Xie, Qingkun (1, 2); Qu, Enshi (1); Ren, Liyong (1)
Author affiliation:(1) Research Department of Information 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:Ren, Liyong(renliy@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10840
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Issue date:2019
Publication year:2019
Article number:1084018
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623224
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144711
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Infrared detection system, due to its high stability and all-weather adaptability, has been widely applied in civil and military areas. In this paper, based on the refractive/diffractive hybrid structure and the passive athermalization, a dualband infrared optical system with large relative aperture (F=1) is designed, which has excellent performance in the correction of thermal aberration, chromatic aberration and second spectrum between-40°C to 60°C. By precisely arranging the double-layer diffraction element, the system designed is simplified effectively, which contains only four lenses. Meanwhile, the optical layout has the advantages of lower weight and smaller volume. The MTF in mid-wave infrared is larger than 0.6, which demonstrates good capacity of target recognition and anti-inference, and thus it is suitable for practical usage in the field of aviation remote sensing.
? 2019 SPIE.
Number of references:13
Main heading:Aberrations
Controlled terms:Diffraction - Hybrid systems - Infrared radiation - Manufacture - Nanophotonics - Optical systems - Overhead lines - Remote sensing
Uncontrolled terms:Athermal designs - Chromatic aberration - Double-layer diffraction - Dual-band infrared - Infrared optical systems - Large relative aperture - Mid wave infrared (MWIR) - Passive athermalization
Classification code:537.1 Heat Treatment Processes - 706.2 Electric Power Lines and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics
Numerical data indexing:Temperature 3.33e+02K
DOI:10.1117/12.2504864

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706497324
Title:Practical superoscillation element design for far field non-scanning superresolution imaging
Authors:Xie, Qingkun (1, 2); Jiang, Yanru (1, 2); Qu, Enshi (1); Ren, Liyong (1)
Author affiliation:(1) Research Department of Information 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:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10840
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Issue date:2019
Publication year:2019
Article number:108400A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623224
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144711
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Superoscillation is a promising method to realize superresolution imaging. Nevertheless, in the point spread function (PSF) of previous superoscillation imaging systems, compared to the several orders of magnitude higher intensity in side-lobes, the extremely small intensity in the focal-spot is a severe constraint for practical applications. In this paper, we creatively segment the conventional superoscillation lens into two simple-fabrication portions to generate the superoscillation optical field and realize superresolution imaging in a local field of view (LFOV). We then analyze the contribution of different portions of the entrance pupil to the system's resolution and propose a novel superoscillation element (NSOE) design to effectively reduce the intensity of side-lobes. We end by reporting our recent results on the imaging of complex targets, and the validity and potential applications of superresolution imaging is well demonstrated.
? 2019 SPIE.
Number of references:12
Main heading:Optical resolving power
Controlled terms:Diffraction - Lenses - Manufacture - Nanophotonics - Optical transfer function - Overhead lines
Uncontrolled terms:Complex targets - Element design - Entrance pupil - Incoherent imaging - Optical field - Orders of magnitude - Super resolution - Super resolution imaging
Classification code:537.1 Heat Treatment Processes - 706.2 Electric Power Lines and Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2506724
Funding details: Number: -, Acronym: -, Sponsor: National Aerospace Science Foundation of China;Number: 61535015, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Acknowledgements: Author would like to acknowledge the financial support from National Nature Science Foundation of China (NSFC) No. 61505246, 61535015

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534744
Title:Zonal wave-front estimation from phase derivative measurements on unconnected domain
Authors:Kewei, E. (1); Zhao, Jianke (1); Li, Mengyang (2); Xue, Xun (1); Li, Jing (1); Li, Kun (1); Liu, Shangkuo (1); Wang, Zhengfeng (1); Zhou, Yan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 10119, China; (2) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang; 621900, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105214
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:For a wavefront tested by Shack-hartmann wavefront sensor, the zonal integration method is often chosen by researchers to solve the reconstruction problem. But it has shown an unacceptable result when the phase derivative data is distributed on an unconnected domain, the obtained wavefront will contain different piston error on each subdomain. Therefore, a new zonal wavefront estimation algorithm is proposed to deal with this drawback, which uses a simultaneous fit method to correct piston error of each subdomain. The validity of the algorithm is verified by a numerical simulation and experimental results.
? 2019 SPIE.
Number of references:14
Main heading:Wavefronts
Controlled terms:Photonics - Pistons
Uncontrolled terms:Integration method - Phase derivatives - Piston errors - Reconstruction problems - Shack-Hartmann wavefront sensors - simultaneous fit - Wave-front sensing - Wavefront estimation
Classification code:612.1.1 Internal Combustion Engine Components - 741.1 Light/Optics
DOI:10.1117/12.2521995
Funding details:
Funding text:One of the authors gratefully acknowledges the financial support from the West Light Foundation of the Chinese Academy

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190306372514
Title:Single-shot spatiotemporal intensity measurement of picosecond laser pulses with compressed ultrafast photography
Authors:Cao, Fengyan (1); Yang, Chengshuai (1); Qi, Dalong (1); Yao, Jiali (1); He, Yilin (1); Wang, Xing (2); Wen, Wenlong (2); Tian, Jinshou (2); Jia, Tianqing (1); Sun, Zhenrong (1); Zhang, Shian (1, 3)
Author affiliation:(1) State Key Laboratory of Precision Spectroscopy, School of Physics and Materials Science, East China Normal University, Shanghai; 200062, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China
Corresponding author:Qi, Dalong(dlqi@lps.ecnu.edu.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:116
Issue date:May 2019
Publication year:2019
Pages:89-93
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:The spatiotemporal measurement of the ultrashort laser pulses is of great significance in the diagnosis of the instrument performance and the exploration of the laser and matter interaction. In this work, we report an advanced compressed ultrafast photography (CUP) technique to measure the spatiotemporal intensity distribution of the picosecond laser pulses with a single shot. This CUP technique is based on a three-dimensional image reconstruction strategy by employing the random codes to encode the space-time-evolving laser pulse and decode it based on a compressed sensing (CS) algorithm. In our CUP system, the measurable laser wavelength depends on the spectral response of the streak camera, which can cover a wide range from ultraviolet (200 nm) to near infrared (850 nm). Based on the CUP system we develop, we successfully measure the spatiotemporal intensity evolutions of some typical laser pulses, such as the 800 nm picosecond laser pulse, the 800 and 400 nm two-color picosecond laser pulses and the supercontinuum picosecond laser pulse. These experimental results show that the CUP technique can well characterize the spatiotemporal intensity information of the picosecond laser pulses. Moreover, this technique has the remarkable advantages with the single shot measurement and without the reference laser pulse.
? 2019 Elsevier Ltd
Number of references:34
Main heading:Picosecond lasers
Controlled terms:Color photography - Image reconstruction - Infrared devices - Space time codes - Ultrashort pulses
Uncontrolled terms:Instrument performance - Intensity distribution - Intensity information - Intensity measurements - Single-shot measurements - Spatiotemporal measurement - Three-dimensional image reconstruction - Ultrafast photography
Classification code:723.2 Data Processing and Image Processing - 742.1 Photography
Numerical data indexing:Size 2.00e-07m, Size 4.00e-07m, Size 8.00e-07m, Size 8.50e-07m
DOI:10.1016/j.optlaseng.2019.01.002
Funding details: Number: 2018M641958, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 16520721200, Acronym: STCSM, Sponsor: Science and Technology Commission of Shanghai Municipality;Number: 17ZR146900, Acronym: STCSM, Sponsor: Science and Technology Commission of Shanghai Municipality;Number: 91850202, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11804097, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61720106009, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11727810, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11774094, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was partly supported by the National Natural Science Foundation of China (No. 91850202 , No. 11774094 , No. 11727810 , No. 11804097 and No. 61720106009 ), the Science and Technology Commission of Shanghai Municipality (No. 17ZR146900 and No. 16520721200 ), and the China Postdoctoral Science Foundation (No. 2018M641958 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906880356
Title:Convolutional Edge Constraint-Based U-Net for Salient Object Detection
Authors:Han, Le (1, 2); Li, Xuelong (3); Dong, Yongsheng (1, 4)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (4) School of Information Engineering, Henan University of Science and Technology, Luoyang; 471023, China
Corresponding author:Dong, Yongsheng(dongyongsheng98@163.com)
Source title:IEEE Access
Abbreviated source title:IEEE Access
Volume:7
Issue date:2019
Publication year:2019
Pages:48890-48900
Article number:6287639
Language:English
E-ISSN:21693536
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:The salient object detection is receiving more and more attention from researchers. An accurate saliency map will be useful for subsequent tasks. However, in most saliency maps predicted by existing models, the objects regions are very blurred and the edges of objects are irregular. The reason is that the hand-crafted features are the main basis for existing traditional methods to predict salient objects, which results in different pixels belonging to the same object often being predicted different saliency scores. Besides, the convolutional neural network (CNN)-based models predict saliency maps at patch scale, which causes the objects edges of the output to be fuzzy. In this paper, we attempt to add an edge convolution constraint to a modified U-Net to predict the saliency map of the image. The network structure we adopt can fuse the features of different layers to reduce the loss of information. Our SalNet predicts the saliency map pixel-by-pixel, rather than at the patch scale as the CNN-based models do. Moreover, in order to better guide the network mining the information of objects edges, we design a new loss function based on image convolution, which adds an L1 constraint to the edge information of saliency map and ground-truth. Finally, experimental results reveal that our SalNet is effective in salient object detection task and is also competitive when compared with 11 state-of-the-art models.
? 2013 IEEE.
Number of references:51
Main heading:Object detection
Controlled terms:Convolution - Forecasting - Image segmentation - Neural networks - Object recognition - Pixels
Uncontrolled terms:Edge extraction - Encoder-decoder architecture - Image convolution - Salient object detection - Skip connection
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
DOI:10.1109/ACCESS.2019.2910572
Funding details: Number: 61761130079, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61871470, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: U1604153, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2018YFB1107400, in part by the National Natural Science Foundation of China under Grant 61871470, Grant 61761130079, and Grant U1604153, in part by the Key Specialized Research and Development Breakthrough of Henan Province under Grant 192102210121, and in part by the Program for Science and Technology Innovation Talents in Universities of Henan Province under Grant 19HASTIT026

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707140732
Title:A Deep Scene Representation for Aerial Scene Classification
Authors:Zheng, Xiangtao (1); Yuan, Yuan (2); Lu, Xiaoqiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Center for Optical Imagery Analysis and Learning, School of the Computer Science, Northwestern Polytechnical University, Xi'an; 710072, 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:57
Issue:7
Issue date:July 2019
Publication year:2019
Pages:4799-4809
Article number:8636541
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:As a fundamental problem in earth observation, aerial scene classification tries to assign a specific semantic label to an aerial image. In recent years, the deep convolutional neural networks (CNNs) have shown advanced performances in aerial scene classification. The successful pretrained CNNs can be transferable to aerial images. However, global CNN activations may lack geometric invariance and, therefore, limit the improvement of aerial scene classification. To address this problem, this paper proposes a deep scene representation to achieve the invariance of CNN features and further enhance the discriminative power. The proposed method: 1) extracts CNN activations from the last convolutional layer of pretrained CNN; 2) performs multiscale pooling (MSP) on these activations; and 3) builds a holistic representation by the Fisher vector method. MSP is a simple and effective multiscale strategy, which enriches multiscale spatial information in affordable computational time. The proposed representation is particularly suited at aerial scenes and consistently outperforms global CNN activations without requiring feature adaptation. Extensive experiments on five aerial scene data sets indicate that the proposed method, even with a simple linear classifier, can achieve the state-of-the-art performance.
? 1980-2012 IEEE.
Number of references:53
Main heading:Antennas
Controlled terms:Chemical activation - Classification (of information) - Convolution - Deep neural networks - Neural networks - Semantics
Uncontrolled terms:Convolutional neural network - Fisher vectors - Geometric invariance - Multiscale representations - Scene classification - Scene representation - Spatial informations - State-of-the-art performance
Classification code:716.1 Information Theory and Signal Processing - 804 Chemical Products Generally
DOI:10.1109/TGRS.2019.2893115
Funding details: Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the State Key Program of National Natural Science of China under Grant 61632018, in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61806193, in part by the Young Top-Notch Talent Program of the Chinese Academy of Sciences under Grant QYZDB-SSWJSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26, and in part by the Xian Postdoctoral Innovation Base Scientific Research Project.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707136999
Title:Tunable photonic RF bandpass filters based on an 80 channel kerr micro-comb source
Authors:Tan, Mengxi (1); Xu, Xingyuan (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Corresponding author:Moss, David J.(dmoss@swin.edu.au)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Volume:Part F129-CLEO_SI 2019
Part number:1 of 1
Issue title:CLEO: Science and Innovations, CLEO_SI 2019
Issue date:2019
Publication year:2019
Report number:SF2N.4
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, CLEO_SI 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:141098
Publisher:OSA - The Optical Society
Abstract:We demonstrate a tunable photonic RF bandpass filter based on a Kerr micro-comb source providing 80 taps in the C-band. We achieve a widely tunable centre frequency (0.05FSRRF ~ 0.40FSRRF) and 3-dB bandwidth (0.5 ~ 4.6 GHz).
? 2019 The Author(s)
Number of references:10
Main heading:Bandpass filters
Controlled terms:Comb filters
Uncontrolled terms:C-bands - Centre frequency - Comb source - RF band-pass filters - Widely tunable
Classification code:703.2 Electric Filters
Numerical data indexing:Decibel 3.00e+00dB, Frequency 5.00e+08Hz to 4.60e+09Hz
DOI:10.1364/CLEO_SI.2019.SF2N.4
Funding details: Number: -, Acronym: ARC, Sponsor: Australian Research Council;
Funding text:This work was supported by the Australian Research Council Discovery Projects Program and NSERC/CRC Canada.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006585432
Title:Deterministic generation and switching of dissipative Kerr soliton in a thermally controlled micro-resonator????(Open Access)
Authors:Lu, Zhizhou (1, 2); Wang, Weiqiang (1, 2); Zhang, Wenfu (1, 2); Chu, Sai T. (3); Little, Brent E. (1); Liu, Mulong (1, 2); Wang, Leiran (1, 2); Zou, Chang-Ling (4, 5); Dong, Chun-Hua (4, 5); Zhao, Bailing (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 (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, Hong Kong; (4) Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, Anhui; 230026, China; (5) Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui; 230026, China
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:9
Issue:2
Issue date:February 1, 2019
Publication year:2019
Article number:025314
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:In this paper, we first experimentally demonstrate deterministic generation and switching of dissipative Kerr solitons (DKSs) in a thermally controlled micro-ring resonator based on high-index doped silica glass platform. In our scheme, an auxiliary laser is introduced to timely balance the intra-cavity heat fluctuation. By decreasing the operation temperature through a thermo-electric cooler, primary-, chaotic-comb and soliton crystal are firstly generated, then increasing the temperature, DKSs switching and single soliton are robustly accessed, which is independent of the tuning speed. During the switching process, varieties of DKSs are identified by tens of the characteristic "soliton-steps". Besides, by simply changing the operation temperature under which the DKSs are formed, the center wavelength of dispersive waves could be tuned in a broadband range. When the micro-ring resonator operating at temperature larger than 63.5 °C, avoided mode-crossing free soliton can be obtained. Our results are favorable for study of on-chip soliton dynamics and practical nonlinear applications.
? 2019 Author(s).
Number of references:40
Main heading:Solitons
Controlled terms:Microelectromechanical devices - Optical resonators - Silica - Switching
Uncontrolled terms:Center wavelength - Dispersive waves - Heat fluctuation - Microring resonator - Nonlinear applications - Operation temperature - Switching process - Thermoelectric cooler
Classification code:741.3 Optical Devices and Systems
Numerical data indexing:Temperature 3.37e+02K
DOI:10.1063/1.5080128
Funding details: Number: 61475188, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61635013, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61705257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB24030600, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (Grant No. 61635013, 61675231, 61475188, 61705257), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB24030600). C.-L. Zou and C.-H. Dong acknowledge the National Key Research and Development Program of China (Grant No. 2016YFA0301303).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006584437
Title:Compact low-noise passively mode-locked Er-doped femtosecond all-fiber laser with 2.68 GHz fundamental repetition rate
Authors:Song, Jiazheng (1, 2); Wang, Hushan (1, 2); Huang, Xinning (1, 2); Hu, Xiaohong (1); Zhang, Ting (1, 2); Wang, Yishan (1); Liu, Yuanshan (1); Zhang, Jianguo (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Engineering and Design, London South Bank University, 103 Borough Road, London; SE1 0AA, United Kingdom
Corresponding author:Liu, Yuanshan(liuyuanshan@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:7
Issue date:March 1, 2019
Publication year:2019
Pages:1733-1738
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A passively mode-locked Er-doped fiber laser with a fundamental repetition rate of 2.68 GHz is reported. The oscillator operating at a central wavelength of 1558.35 nm has a compact, robust structure and low-noise performance. The timing jitter integrated from 30 MHz down to 300 Hz is 82.5 fs, and the timing jitter performance is analyzed based on the theory model. The amplification and compression of the high repetition rate optical pulses are also investigated. After a three-stage amplifier, the average power is boosted to 430 mW. Meanwhile, based on the nonlinear self-phase modulation effect, the spectral bandwidth is broadened from 7.56 to 19.2 nm, and the corresponding pulse width is compressed to 244 fs.
? 2019 Optical Society of America.
Number of references:32
Main heading:Erbium doped fiber amplifiers
Controlled terms:Fiber lasers - Mode-locked fiber lasers - Passive mode locking - Pulse repetition rate - Timing jitter
Uncontrolled terms:Central wavelength - Er-doped fiber laser - High-repetition-rate optical pulse - Jitter performance - Low noise performance - Passively mode-locked - Spectral bandwidth - Three-stage amplifiers
Classification code:744 Lasers
Numerical data indexing:Size 1.56e-06m, Size 7.56e-09m to 1.92e-08m, Time 2.44e-13s, Time 8.25e-14s, Frequency 2.68e+09Hz, Frequency 3.00e+07Hz to 3.00e+02Hz, Power 4.30e-01W
DOI:10.1364/AO.58.001733
Funding details: Number: 2016YFF0200700, Acronym: -, Sponsor: Changjiang Scholar Program of Chinese Ministry of Education;Number: 61875226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Key R&D Program of China (2016YFF0200700); National Natural Science Foundation of China (NSFC) (61875226).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106643736
Title:Truncated Gaussian-Bessel beams for short-pulse processing of small-aspect-ratio microchannels in dielectrics
Authors:Liu, X. (1, 2, 3); Li, Q. (3); Sikora, A. (3); Sentis, M. (3); Utéza, O. (3); Stoian, R. (4); Zhao, W. (1); Cheng, G. (1); Sanner, N. (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) Aix-Marseille University, CNRS, LP3 UMR 7341, Marseille; F-13288, France; (4) Laboratoire Hubert Curien, UMR CNRS 5516, Université de Lyon, Université Jean Monnet, Saint Etienne; 42000, France
Corresponding author:Sanner, N.(nicolas.sanner@univ-amu.fr)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:5
Issue date:2019
Publication year:2019
Pages:6996-7008
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In order to control the length of micro-channels ablated at the surface of dielectrics, we use annular filtering apertures for tailoring the depth of focus of micrometric Gaussian-Bessel beams. We identify experimentally and numerically the appropriate beam truncation that promotes a smooth axial distribution of intensity with a small elongation, suitable for processing micro-channels of small aspect ratio. Single-shot channel fabrication is demonstrated on the front surface of a fused silica sample, with sub-micron diameter, high-quality opening, and depth of few micrometers, using 1 ps low-energy (< 0.45 μJ) pulse. Finally, we realize 10 × 10 matrices of densely packed channels with aspect ratio ~5 and a spatial period down to 1.5 μm, as a prospective demonstration of direct laser fabrication of 2D photonic-crystal structures.
? 2019 Optical Society of America.
Number of references:35
Main heading:Aspect ratio
Controlled terms:Bessel functions - Fused silica - Gaussian beams - Laser beams - Photonic crystals
Uncontrolled terms:2-D photonic crystals - Axial distribution - Beam truncation - Depth of focus - Direct laser fabrications - Filtering apertures - Small aspect ratio - Spatial periods
Classification code:711 Electromagnetic Waves - 744.8 Laser Beam Interactions - 812.3 Glass - 921 Mathematics
Numerical data indexing:Size 1.50e-06m, Time 1.00e-12s
DOI:10.1364/OE.27.006996
Funding details: Number: 11BS09026, Acronym: ANR, Sponsor: Agence Nationale de la Recherche;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2018YFB11074, Acronym: -, Sponsor: Research and Development;Number: LY14F050002, Acronym: -, Sponsor: Natural Science Foundation of Zhejiang Province;
Funding text:China Scholarship Council (CSC), National Key Research and Development Program of China (Grant No.2018YFB11074), National Natural Science Foundation of Zhejiang (No.LY14F050002), Agence Nationale de la Recherche (project Smart-Lasir 11BS09026), European Community, Ministry of Research and High Education, Region Provence-Alpes-C?te d’Azur, Department of Bouches-du-Rh?ne, City of Marseille, CNRS, Aix-Marseille University. We thank D. Grojo, R. Clady, L. Charmasson and J. L. Bellemain for helpful discussions and technical assistance.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006939407
Title:An optical design for dual-band infrared diffractive telescope
Title of translation:一种红外双波段衍射望远镜的光学设计
Authors:Wang, Hao (1, 2); Kang, Fu-Zeng (1); Zhao, Wei (1); Li, Yi-Chao (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:Kang, Fu-Zeng(kangfuzeng@opt.ac.cn)
Source title:Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Abbreviated source title:Hongwai Yu Haomibo Xuebao
Volume:38
Issue:1
Issue date:February 1, 2019
Publication year:2019
Pages:39-43
Language:English
ISSN:10019014
CODEN:HHXUEZ
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In this paper, the double-layer harmonic diffractive element (HDE) structure is investigated and the optimization procedure is based on the equation of diffraction efficiency of the double-layer diffractive optical element. The diffraction efficiency of the system in the designed middle and far infrared wavebands is larger than 99%, which improves the image contrast and the imagequality significantly. A new dual-band infrared double-layer HDE telescope is designed, which can work in the middle and far infrared wavebands. It is shown that the system approximately attains diffraction limit and is easy to processed.
? 2019, Science Press. All right reserved.
Number of references:10
Main heading:Image enhancement
Controlled terms:Diffraction efficiency - Efficiency - Optical design - Telescopes
Uncontrolled terms:Diffraction limits - Double layers - Dual-band infrared - Far infrared - Harmonic diffractive elements - Image contrasts - Optimization procedures - Wavebands
Classification code:741.1 Light/Optics - 913.1 Production Engineering
Numerical data indexing:Percentage 9.90e+01%
DOI:10.11972/j.issn.1001-9014.2019.01.007
Funding details: Number: 61875227, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Supported by Nationa Natural Science Foundation of China (61875227).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191606807309
Title:Terahertz oscilloscope for recording time information of ultrashort electron beams
Authors:Zhao, Lingrong (1, 2); Wang, Zhe (1, 2); Tang, Heng (1, 2); Wang, Rui (1, 2); Cheng, Yun (1, 2); Lu, Chao (1, 2); Jiang, Tao (1, 2); Zhu, Pengfei (1, 2); Hu, Long (3); Song, Wei (3); Wang, Huida (3); Qiu, Jiaqi (4); Kostin, Roman (5); Jing, Chunguang (5); Antipov, Sergey (5); Wang, Peng (6); Qi, Jia (6); Cheng, Ya (6, 7); Xiang, Dao (1, 2, 8); Zhang, Jie (1, 2)
Author affiliation:(1) Key Laboratory for Laser Plasmas, Ministry of Education, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai; 200240, China; (3) Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an, Shanxi; 710024, China; (4) Nuctech Company Limited, Beijing; 100084, China; (5) Euclid Techlabs LLC, Bolingbrook; IL; 60440, United States; (6) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai; 201800, China; (7) State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai; 200062, China; (8) Tsung-Dao Lee Institute, Shanghai; 200240, China
Source title:Physical Review Letters
Abbreviated source title:Phys Rev Lett
Volume:122
Issue:14
Issue date:April 9, 2019
Publication year:2019
Article number:144801
Language:English
ISSN:00319007
E-ISSN:10797114
CODEN:PRLTAO
Document type:Journal article (JA)
Publisher:American Physical Society
Abstract:We propose and demonstrate a terahertz (THz) oscilloscope for recording time information of an ultrashort electron beam. By injecting a laser-driven THz pulse with circular polarization into a dielectric tube, the electron beam is swept helically such that the time information is uniformly encoded into the angular distribution that allows one to characterize both the temporal profile and timing jitter of an electron beam. The dynamic range of the measurement in such a configuration is significantly increased compared to deflection with a linearly polarized THz pulse. With this THz oscilloscope, nearly 50-fold longitudinal compression of a relativistic electron beam to about 15 fs (rms) is directly visualized with its arrival time determined with 3 fs accuracy. This technique bridges the gap between streaking of photoelectrons with optical lasers and deflection of relativistic electron beams with radio-frequency deflectors, and should have wide applications in many ultrashort electron-beam-based facilities.
? 2019 American Physical Society.
Number of references:52
Main heading:Electron beams
Controlled terms:Angular distribution - Cathode ray oscilloscopes - Electrons - Polarization - Terahertz waves
Uncontrolled terms:Dielectric tubes - Linearly polarized - Longitudinal compression - Radio frequencies - Relativistic electron beam - Temporal profile - Time information - Ultrashort electron beam
Classification code:711 Electromagnetic Waves - 942.2 Electric Variables Measurements
Numerical data indexing:Time 1.50e-14s, Time 3.00e-15s
DOI:10.1103/PhysRevLett.122.144801
Funding details: Number: 11327902, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the Major State Basic Research Development Program of China (Grant No. 2015CB859700) and by the National Natural Science Foundation of China (Grants No. 11327902, No. 11504232, and No. 11721091). D.X. is grateful for support from the Office of Science and Technology, Shanghai Municipal Government (Grants No. 16DZ2260200 and No. 18JC1410700).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748662
Title:Camouflage target detection based on short-wave infrared hyperspectral images
Authors:Yan, Qiangqiang (1); Li, Haiwei (1); Wu, Yinhua (1); Zhang, Xiaorong (1); Wang, Shuang (1); Zhang, Qiang (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision, Mechanics of Chinese Academy of Sciences, 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:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:110232M
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:After years of development, military camouflage has formed a set of theoretical and technical systems represented by color camouflage. At present, a large number of camouflage technology research has been carried out for multispectral reconnaissance of visible and near-infrared. In order to better detect and identify the camouflage target, it is necessary to expand the new reconnaissance band and improve the spectral resolution of the reconnaissance instrument. In this paper, the research on camouflage target recognition technology is carried out through short-wave infrared hyperspectral imaging technology, and the camouflage target is identified by SAM, ACM and CEM algorithms respectively, and the characteristics of three methods in short-wave infrared camouflage target recognition are verified. This research can improve the ability to detect and identify camouflage targets and provide a new means for modern battlefield reconnaissance.
? 2019 SPIE.
Number of references:10
Main heading:Radar target recognition
Controlled terms:Camouflage - Hyperspectral imaging - Infrared devices - Infrared radiation - Spectroscopy
Uncontrolled terms:Camouflage technology - HyperSpectral - Hyperspectral imaging technologies - Multi-spectral - Short wave infrared - Target recognition - Technical systems - Visible and near infrared
Classification code:404.1 Military Engineering - 716.2 Radar Systems and Equipment - 741.1 Light/Optics
DOI:10.1117/12.2521361
Funding details: Number: 2016YFC201102, Acronym: -, Sponsor: National Key Clinical Specialty Discipline Construction Program of China;Number: 11727806, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:All three methods can realize the effect of camouflage target detection and recognition on medium wave infrared spectroscopy data. Among them, CEM can eliminate the influence of the background on the target detection, that is, avoid the problem of the SAM algorithm to detect the leakage in the target, and avoid the problem that the ACE algorithm can’t effectively eliminate the background influence, and has a better classification effect. Acknowledgments The work is supported by National Natural Science Foundation of China(Grant no. 11727806, 11573058) and National Key R&D Program of China(Grant no. 2016YFC201102). References [1]. Yan, Y. Wang, Z. Dong, D. "Development status and trend of military camouflage technology," China Mechanical Engineering, 23(17):2136-2141(2012) [2]. Zhang, D. Zhang, J. Yao, K. Cheng, M. Wu, Y. "Infrared ship-target recognition based on SVM classification," Infrared and Laser Engineering, 45(1), 104004-0104004(6)(2016). [3]. Zhou, P. Wang, F. Zhang, H. Xue, M. "Camouflaged Target Detection Based on Visible and Near Infrared Polarimetric Imagery Fusion". Proc. SPIE - The International Society for Optical Engineering, 81940Y(2011). [4]. Kouznetworksov, A.Yu. Sergeev, S.S, "Analysis of camouflage cover spectral characteristics by imaging spectrometer," Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 16, 258-264(2016). [5]. Kastek, M. Pi?tkowski, T. Dulski, R, et al. "Multispectral and hyperspectral measurements of soldier's camouflage equipment," Proc. SPIE, 2012. [6]. Fan, J. Li, Liang. Li, W. "Development of direct infrared counter measure system and technology," Infrared and Laser Engineering, 2015, 44(3), 789-794. [7]. Chen, X. Yuan, J.-T. Yang, L. "Study on infrared characterization and stealthy technology of ground targets". Journal of Engineering Thermophysics. 28, 844-846(2007). [8]. Du, S. Lv, X. Feng, Y. Zhang, W. Gao, Y. "Artificial infrared illuminator effect on ground targets infrared characteristic," Infrared and Laser Engineering, 40, 384-389(2011).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706489092
Title:Research on the optical system of single-band all-sky airglow imager
Authors:Li, Zhantao (1, 2); Han, Bin (1, 2); Xiao, Yang (1, 2); Yu, Tingting (1, 2)
Author affiliation:(1) Xi'an Institute of Optics Precision Mechanic, Chinese Academy of Sciences, Xi'an, Shanxi; 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:10841
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Meta-Surface-Wave and Planar Optics
Issue date:2019
Publication year:2019
Article number:108410R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623248
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Meta-Surface-Wave and Planar Optics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144712
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The middle and upper atmosphere is an important part of atmosphere of the earth. In this region, there are many photochemical phenomena and dynamical processes. One of the photochemical phenomena is airglow. When excited atmospheric molecule or atom transmits to lower level, the light with some wavelength will emit. The light is referred to as airglow. Airglow is therefore a powerful tool in investigations of atmospheric composition, temperature, and density in the emission region, and mass and energy movements to or from this region. Tracing the airglow emission, all-sky airglow imagers are widely used for imaging the atmospheric airglow. The characters of the imager are: wide field of view, fast, high resolution, low cost. This paper systematically studies the basic principle of the imager, completes the calculation of the key parameters, designs the optical system structure of the imager and optimizes the system image quality to obtain an ideal design result. The main contents can be list as follow. All-sky imaging technology records the optical phenomena in the 180° range above the ground plane with imaging and storage media. Use the fisheye lens to realize the 180° of the field of view. Different airglow layers correspond to different radiation peak heights. In order to obtain the atmospheric airglow signal at a certain height, it is necessary to filter the airglow radiation of different bands. The intensity of airglow information using narrow-band filter extraction feature height region of the upper atmosphere. High-sensitivity CCD were used to record all-sky airglow intensity distributions. The system consists of fisheye lens, telecentric imaging lens, filter, imaging lens and CCD. Through the analysis of recorded images, obtained observation data of regional atmospheric fluctuations of airglow height. The central wavelength of the imaging system is 630.5 nm, the bandwidth is 2 nm, the field of view is 180° the focal length is 5 mm, and the relative aperture is 1:1.9; The modulation transfers function (MTF) is more than 0.75 at the Nyquist spatial frequency of 37 lp/mm. The root-mean-square (RMS) radius of spot diagram is less than half of the pixel. 80% of the energy is enclosed in a pixel, and the uniformity of image illumination is 89%. The design requirements are satisfied. And based on the final design, the lens is simplified and the glass material is simplified. Finally, optimization of tolerance analysis is used to guide actual production. The final system structure compact, low cost, high resolution, suitable for airglow atmospheric radiation detection.
? 2019 SPIE.
Number of references:16
Main heading:Structural design
Controlled terms:Atmospheric composition - Atmospheric movements - Atmospheric radiation - Atmospheric structure - Costs - Digital storage - Fits and tolerances - Glass - Image sensors - Light - Manufacture - Optical design - Optical systems - Pixels - Structured programming - Surface waves - Upper atmosphere
Uncontrolled terms:airglow - All-sky - All-sky airglow imager - Atmospheric fluctuations - Atmospheric molecules - High sensitivity ccds - Intensity distribution - Telecentric imaging lens
Classification code:408.1 Structural Design, General - 443.1 Atmospheric Properties - 537.1 Heat Treatment Processes - 722.1 Data Storage, Equipment and Techniques - 723.1 Computer Programming - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 812.3 Glass - 911 Cost and Value Engineering; Industrial Economics
Numerical data indexing:Percentage 8.00e+01%, Percentage 8.90e+01%, Size 2.00e-09m, Size 5.00e-03m, Size 6.31e-07m
DOI:10.1117/12.2504967

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106634163
Title:Laser cavity-soliton microcombs
Authors:Bao, Hualong (1); Cooper, Andrew (1); Rowley, Maxwell (1); Di Lauro, Luigi (1); Totero Gongora, Juan Sebastian (1); Chu, Sai T. (2); Little, Brent E. (3); Oppo, Gian-Luca (4); Morandotti, Roberto (5, 6, 7); Moss, David J. (8); Wetzel, Benjamin (1); Peccianti, Marco (1); Pasquazi, Alessia (1)
Author affiliation:(1) Emergent Photonics (Epic) Laboratory, Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom; (2) Department of Physics, City University of Hong Kong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Xi’an, China; (4) SUPA, Department of Physics, University of Strathclyde, Glasgow, United Kingdom; (5) INRS-EMT, Varennes; QC, Canada; (6) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; Sichuan, China; (7) ITMO University, St Petersburg, Russia; (8) Centre for Microphotonics, Swinburne University of Technology, Hawthorn; VIC, Australia
Corresponding author:Pasquazi, Alessia(a.pasquazi@sussex.ac.uk)
Source title:Nature Photonics
Abbreviated source title:Nat. Photon.
Volume:13
Issue:6
Issue date:June 1, 2019
Publication year:2019
Pages:384-389
Language:English
ISSN:17494885
E-ISSN:17494893
Document type:Journal article (JA)
Publisher:Nature Publishing Group, Houndmills, Basingstoke, Hampshire, RG21 6XS, United Kingdom
Abstract:Microcavity-based frequency combs, or ‘microcombs’1,2, have enabled many fundamental breakthroughs3–21 through the discovery of temporal cavity-solitons. These self-localized waves, described by the Lugiato–Lefever equation22, are sustained by a background of radiation usually containing 95% of the total power23. Simple methods for their efficient generation and control are currently being investigated to finally establish microcombs as out-of-the-lab tools24. Here, we demonstrate microcomb laser cavity-solitons. Laser cavity-solitons are intrinsically background-free and have underpinned key breakthroughs in semiconductor lasers22,25–28. By merging their properties with the physics of multimode systems29, we provide a new paradigm for soliton generation and control in microcavities. We demonstrate 50-nm-wide bright soliton combs induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold22, measuring a mode efficiency of 75% versus the theoretical limit of 5% for bright Lugiato–Lefever solitons23. Finally, we can tune the repetition rate by well over a megahertz without any active feedback.
? 2019, The Author(s), under exclusive licence to Springer Nature Limited.
Number of references:43
Main heading:Solitons
Controlled terms:Laser resonators - Microcavities - Semiconductor lasers
Uncontrolled terms:Active feedback - Cavity solitons - Frequency combs - Localized waves - Multimode system - Power thresholds - Soliton generation - Theoretical limits
Numerical data indexing:Percentage 5.00e+00%, Percentage 7.50e+01%, Percentage 9.50e+01%
DOI:10.1038/s41566-019-0379-5

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106614857
Title:Fuzzy Greenberger-Horne-Zeilinger state analyzer and multiparty measurement-device-independent quantum key distribution network
Authors:Zhang, Litao (1); Hu, Min (1); Ran, Pan (1); Zeng, Hanyu (1); Li, Jun (2); Guo, Banghong (1, 2, 3, 4, 5)
Author affiliation:(1) South China Normal University, School of Information and Optoelectronic Science and Engineering, Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou, China; (2) South China Normal University, South China Academy of Advanced Optoelectronics, Guangzhou, China; (3) Shenzhen University, College of Computer Science and Software Engineering, Shenzhen, China; (4) Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an, China; (5) Chinese Academy of Sciences, University of Science and Technology of China, Key Laboratory of Quantum Information, Hefei, China
Corresponding author:Guo, Banghong(guobh@scnu.edu.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:58
Issue:1
Issue date:January 1, 2019
Publication year:2019
Article number:016113
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:Greenberger-Horne-Zeilinger (GHZ) state is an essential resource in quantum processing. We propose multiparty measurement-device-independent quantum key distribution (MDI-QKD) protocol based on a fuzzy GHZ state analyzer, which is composed of linear optical components. Our scheme requires only N detectors and N-1 polarizing beam splitters to realize an N-party MDI-QKD network. From numerical simulations, the security communication distance is improved to 300 km, and key rate is determined to be higher than 10-14. Compared with the previous work, our scheme needs less optical components and detectors, is easier to extend more users, and narrows the gap between theory and practice in multiparty MDI-QKD network.
? 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:37
Main heading:Quantum cryptography
Controlled terms:Quantum entanglement - Quantum optics
Uncontrolled terms:Greenberger-Horne-Zeilinger state - Linear optical - Measurement device - Optical components - Polarizing beam splitters - Quantum Information - Security communication - Theory and practice
Classification code:931.4 Quantum Theory; Quantum Mechanics
Numerical data indexing:Size 3.00e+05m
DOI:10.1117/1.OE.58.1.016113
Funding details: Number: KQI201508, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 201001D0104799318, Acronym: -, Sponsor: Guangdong Province Introduction of Innovative R&D Team;Number: SKLST201602, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: MMJJ201401011, Acronym: -, Sponsor: -;Number: 2014J4100050, Acronym: -, Sponsor: Guangzhou Science and Technology Program key projects;Number: 61572203, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Key Laboratory of Quantum Information;
Funding text:This work was supported by the National Natural Science Foundation of China (No. 61572203), the National Cryptography Development Foundation of China (No. MMJJ201401011), the Science and Technology Program of Guangzhou, China (No. 2014J4100050), the Open Research Fund (No. KQI201508) of Key Lab of Quantum Information, Chinese Academy of Sciences, the Open Research Fund (No. SKLST201602) of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, and the Guangdong Innovative Research Team Program (No. 201001D0104799318).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192206992428
Title:Nd3+: Photo-thermo-refractive Glass Waveguides Written by Femtosecond Laser
Title of translation:飞秒激光在掺Nd3+光热敏折变玻璃中写入光波导
Authors:Zhang, Ze-Yu (1); An, Hai-Tao (1); Wang, Xu (2); Xie, Ying-Wu (1); Zhang, Hua (1); Liu, Qing (3); Chen, Li-Gong (1); Yang, Bo (1)
Author affiliation:(1) Xi'an Institute of Modern Control Technology, 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; (3) Zhejiang Wanli University, Ningbo; Zhejiang; 315100, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:3
Issue date:March 1, 2019
Publication year:2019
Article number:0314002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:Femtosecond laser with central wavelength of 1 028 nm, repetition rate of 50 kHz and pulse width of 220 fs is used to write double line and tubular depressed cladding waveguides in Nd3+ doped photo-thermo-refractive glass. The influences of laser power, double line separation and diameters of tubular depressed cladding waveguide on the near-field modes of waveguides are investigated, and the waveguides with better guiding mode are obtained. Refractive index profile is reconstructed by intensity distribution of the near-field mode, the largest positive refractive index change for these two types of waveguides is +7.0×10-4 and +5.5×10-4, respectively. By using the scattering technique, the propagation loss of double line waveguide is about 1.29 dB/cm. The loss of tubular depressed cladding waveguide is less than 1.95 dB/cm by testing the insert loss. Therefore, waveguides inscribed directly by femtosecond laser in Nd3+ doped photo-thermo-refractive glass are promising candidates for the development of integrated optical device.
? 2019, Science Press. All right reserved.
Number of references:24
Main heading:Waveguides
Controlled terms:Cladding (coating) - Femtosecond lasers - Glass - Integrated optics - Pulse repetition rate - Refractive index
Uncontrolled terms:Depressed cladding - Double line - Femtosecond laser writing - Integrated optical devices - Intensity distribution - Photo-thermo-refractive glass - Refractive index changes - Refractive index profiles
Classification code:714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass
Numerical data indexing:Frequency 5.00e+04Hz, Size 1.03e-06m, Time 2.20e-13s
DOI:10.3788/gzxb20194803.0314002
Funding details: Number: 61775236, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: LY14F050002, Acronym: -, Sponsor: Natural Science Foundation of Zhejiang Province;
Funding text:The National Nature Science Foundation of China (No.61775236), the Natural Science Foundation of Zhejiang (No.LY14F050002).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190106335318
Title:Research on temperature compensation technology of micro-electro-mechanical systems gyroscope in strap-down inertial measurement unit
Authors:Liu, Ying (1); Liu, Cong (1); Xu, Jintao (2); Zhao, Xiaodong (2)
Author affiliation:(1) Xi’an University of Posts and Telecommunications, Xi’an; 710121, China; (2) Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China
Corresponding author:Liu, Ying(Ly676@163.com)
Source title:Advances in Intelligent Systems and Computing
Abbreviated source title:Adv. Intell. Sys. Comput.
Volume:891
Part number:1 of 1
Issue title:Proceedings of the 5th Euro-China Conference on Intelligent Data Analysis and Applications
Issue date:2019
Publication year:2019
Pages:10-16
Language:English
ISSN:21945357
ISBN-13:9783030037659
Document type:Conference article (CA)
Conference name:5th Euro-China Conference on Intelligent Data Analysis and Applications, ECC 2018
Conference date:October 12, 2018 - October 14, 2018
Conference location:Xian, China
Conference code:222319
Publisher:Springer Verlag
Abstract:Due to the characteristics of MEMS gyroscope and the influence of the peripheral driving circuit, the MEMS gyroscope is easily affected by temperature and the accuracy is deteriorated. The compensation delay is caused by the complexity of the model in practical engineering applications. A second-order polynomial compensation model for temperature-divided regions is proposed by analyzing the mechanism of gyroscope zero-bias temperature drift. The Model first divides the temperature region of the gyroscope work, and then uses the least squares method to solve the parameters according to multiple linear regression analysis. Finally, the model was verified by experiments. The results show that the model can effectively reduce the drift temperature drift caused by temperature changes, which can reduce the temperature drift after compensation by 73.3%.
? Springer Nature Switzerland AG 2019.
Number of references:8
Main heading:Gyroscopes
Controlled terms:Data handling - Information analysis - Least squares approximations - Linear regression - MEMS
Uncontrolled terms:Inertial measurement unit - MEMS gyroscope - Micro electro-mechanical systems gyroscopes - Multiple linear regression analysis - Practical engineering applications - Second-order polynomial - Temperature compensation - Zero bias
Classification code:704.2 Electric Equipment - 723.2 Data Processing and Image Processing - 903.1 Information Sources and Analysis - 921.6 Numerical Methods - 922.2 Mathematical Statistics
Numerical data indexing:Percentage 7.33e+01%
DOI:10.1007/978-3-030-03766-6_2
Funding details: Number: 51405387, Acronym: -, Sponsor: China National Funds for Distinguished Young Scientists;Number: 2016JQ5051, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Acknowledgements. This work was supported by the Shaanxi Natural Science Foun-dation (2016JQ5051) and the National Science Foundation for Young Scientists of China (51405387).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191906908967
Title:Compound denoising method of laser speckle noise in laser inherent field imaging
Title of translation:激光相干场成像散斑噪声复合去噪方法
Authors:Cheng, Zhi-Yuan (1); Li, Zhi-Guo (1); She, Wen-Ji (1); Xia, Ai-Li (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechnics, Chinese Acdemy of Sciences, Xi'an; 710119, China
Corresponding author:Cheng, Zhi-Yuan(czy@opt.ac.cn)
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:68
Issue:5
Issue date:March 5, 2019
Publication year:2019
Article number:054206
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:Noise is an important factor affecting the image quality of laser coherent field high resolution imaging system. And there exists not only background light additive noise but also laser multiplicative speckle noise in a laser coherent field imaging system. Both of the above noise affect the imaging quality of laser coherent field system. In order to improve the imaging quality from the perspective of noise suppression and settle the imaging quality degradation problem of laser multiplicative speckle noise and background additive noise in the laser coherent field imaging system, the model for the influence of multiplicative speckle noise and background additive noise on laser echo field demodulated signal is established in atmospheric downlink. Then, based on the model, a novel homomorphic filter and sparse matrix trace cascade compound de-noising algorithm is put forward. Firstly, based on the homomorphic filtering theory, the laser multiplicative speckle noise in the laser echo demodulated signal is converted into the additive noise by logarithmic transformation. Then the low-frequency laser multiplicative speckle noise is filtered by the high-pass filter, and the high-frequency demodulated signal is retained. The logarithmic inverse transform is used to obtain the laser echo demodulation signal after the multiplicative speckle noise has been filtered out. Next, the phase random disturbance of atmosphere in laser echo demodulated signal is suppressed by phase closure technology and the imaging spectrum component is reconstructed by the spectrum iterative reconstruction method. Then the high resolution image is obtained by spectrum component inverse Fourier transform. Finally, the effect of background additive noise on the image quality is suppressed by the sparse base tracking theory. The simulated and outdoor experiment result are used to verify the denoising effect and image quality enhancement effect of the composite de-noising method. Compared with the existing single denoising method, the composite denoising method is shown to be able to effectively eliminate laser multiplicative speckle noise and background additive noise at one time. The proposed method can improve image contrast and promote the Strehl ratio of imaging quality in a coherent imaging system. It provides a theoretical basis for improving imaging quality and denosing laser multiplicative speckle noise and background additive noise in coherent field imaging system.
? 2019 Chinese Physical Society.
Number of references:23
Main heading:Additive noise
Controlled terms:Additives - High pass filters - Image enhancement - Image quality - Image resolution - Imaging systems - Inverse problems - Inverse transforms - Iterative methods - Laser theory - Speckle
Uncontrolled terms:Background light - De-noising - Homomorphic filter - Image quality enhancements - Inverse Fourier transforms - Laser speckle - Logarithmic transformations - Multiplicative speckle noise
Classification code:703 Electric Circuits - 703.2 Electric Filters - 741.1 Light/Optics - 744.1 Lasers, General - 746 Imaging Techniques - 803 Chemical Agents and Basic Industrial Chemicals - 921.3 Mathematical Transformations - 921.6 Numerical Methods
DOI:10.7498/aps.68.20181578
Funding details: Number: 2017JM6035, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Project supported by the National Natural Science Foundation of China (Grant No. 61875257) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2017JM6035).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006915284
Title:High-Sensitivity and Long-Life Microchannel Plate Processed by Atomic Layer Deposition
Authors:Cao, Weiwei (1, 2, 3); Zhu, Bingli (3); Bai, Xiaohong (3); Xu, Peng (3); Wang, Bo (4); Qin, Junjun (4, 5); Gou, Yongsheng (4); Lei, Fanpu (4); Liu, Baiyu (1); Guo, Junjiang (1, 2, 3); Zhu, Jingping (2); Bai, Yonglin (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostic Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Laboratory of Information Photonic Technique, Xi’an Jiaotong University, Xi’an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100091, 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) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; Shanxi; 030006, China
Corresponding author:Cao, Weiwei(caoweiwei@opt.ac.cn)
Source title:Nanoscale Research Letters
Abbreviated source title:Nanoscale Res. Lett.
Volume:14
Issue date:2019
Publication year:2019
Article number:153
Language:English
ISSN:19317573
E-ISSN:1556276X
Document type:Journal article (JA)
Publisher:Springer New York LLC
Abstract:As a key component of electron multiplier device, a microchannel plate (MCP) can be applied in many scientific fields. Pure aluminum oxide (Al2O3) as secondary electron emission (SEE) layer were deposited in the pores of MCP via atomic layer deposition (ALD) to overcome problems such as high dark current and low lifetime which often occur on traditional MCP. In this paper, we systematically investigate the morphology, element distribution, and structure of samples by scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS), respectively. Output current of different thickness of Al2O3 was studied and an optimal thickness was found. Experimental tests show that the average gain of ALD-MCP was nearly five times better than that of traditional MCP, and the ALD-MCP showed better sensitivity and longer lifetime.
? 2019, The Author(s).
Number of references:28
Main heading:Atomic layer deposition
Controlled terms:Alumina - Aluminum coatings - Aluminum oxide - Atoms - Electron multipliers - Image storage tubes - Microchannels - Morphology - Plates (structural components) - Scanning electron microscopy - Secondary emission - Thin films
Uncontrolled terms:Different thickness - Element distribution - Experimental test - Long lifetime - Micro channel plate - Optimal thickness - Scientific fields - Secondary electron emissions
Classification code:408.2 Structural Members and Shapes - 714.1 Electron Tubes - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 813.2 Coating Materials - 931.3 Atomic and Molecular Physics - 951 Materials Science
DOI:10.1186/s11671-019-2983-1
Funding details: Number: 11803074, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This research is supported by the Key Laboratory Fund of Chinese Academy Of Sciences (No. CXJJ-17S040), National Natural Science Foundation of China (No.11803074), Strategic Priority Research Program of Chinese Academy of Sciences (No. XDA17010203)?and Shaanxi Natural Science Basic Research Project (No. 2018JM6059). This research is supported by the Key Laboratory Fund of Chinese Academy Of Sciences (No. CXJJ-17S040) and National Natural Science Foundation of China (No.11803074). The Key Laboratory Fund of Chinese Academy Of Sciences (No. CXJJ-17S040) is contributed for design, atomic layer deposition process, and materials characterization. National Natural Science Foundation of China (No.11803074) and Shaanxi Natural Science Basic Research Project (No. 2018JM6059) are contributed for analysis and interpretation of data. All data generated or analyzed during this study are included in this published article and its supplementary information files.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706489056
Title:A Mueller matrix measurement technique based on a division-of-aperture polarimetric camera
Authors:Ju, Haijuan (1, 2); Ren, Liyong (1); Liang, Jian (1); Qu, Enshi (1); Bai, Zhaofeng (1)
Author affiliation:(1) Research Department of Information 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:Ren, Liyong(renliy@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10839
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Issue date:2019
Publication year:2019
Article number:108391F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623200
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144715
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:When an object is illuminated by an incoming light described by a Stokes vector, the outgoing light scattered, reflected or transmitted from the object is modulated and its polarization property can be expressed by another Stokes vector. The transformation relation between the incoming and the outgoing Stokes vectors is called the Mueller matrix. The Mueller matrix completely characterizes the optical properties of the light scattered or transmitted from the object, including the diattenuation, the retardance and the depolarization. So, how to measure the Mueller matrix efficiently and accurately becomes considerably significant for its practical applications. We propose a new method for Mueller matrix fast acquisition based on a division-of-aperture simultaneous polarimetric imaging technique. Traditional methods for obtaining the 16 elements of the Mueller matrix require at least 16 polarimetric measurements. While in our method it is enough by just changing the states of polarization (SOPs) of the input light 4 times. These time-saving and easy calculating features are contributed to our specific polarimetric camera, where a full-Stokes vector is obtained easily since 3 linear SOPs (0°, 45°, 90°) and 1 circular SOP can be recorded simultaneously by sharing the same detector. To simply verify the effectiveness of our method, polarizers (45°, 90°), and quarter-wave plates (0°, 45°) are chosen as samples to be measured. Experimental results show that they are consistent with the theoretical results, both in the Mueller matrix and the corresponding images. We predict that this method for Mueller matrix rapid acquisition can get wide potential applications.
? 2019 SPIE.
Number of references:11
Main heading:Matrix algebra
Controlled terms:Cameras - Imaging techniques - Linear transformations - Liquid crystals - Manufacture - Optical devices - Optical properties - Optical testing - Polarimeters - Polarization - Vectors
Uncontrolled terms:Liquid crystal variable retarders - Measurement techniques - Mueller matrix - Polarimetric imaging - Polarimetric measurements - Polarization properties - Quarter wave-plate - States of polarizations
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 746 Imaging Techniques - 921.1 Algebra - 921.3 Mathematical Transformations - 941.3 Optical Instruments
DOI:10.1117/12.2506569

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706497364
Title:Optimization design and performance test of optical antenna for laser communication
Authors:Zhao, Dongge (1, 2); Ma, Xiaolong (1); Yang, Jianfeng (1); Chen, Guoqing (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Science, Beijing; 101408, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10840
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Issue date:2019
Publication year:2019
Article number:1084017
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623224
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144711
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Laser communication has many outstanding advantages, such as high optical gain, high anti-interception, high anti-interference ability and high communication rate, it is an important technical method to solve the problem of high speed communication. The optical antenna is responsible for the reception and transmission of the signal, which is an important part of the laser communication terminal. Based on the general research situation at home and abroad, from the aspect of system SNR and efficiency, this article has determined some targets such as receiving / emission efficiency, wave aberration and ability of off-Axis stray light suppression; combined with specific application requirements, we have determined the basic parameters such as communication wavelength: 1545nm, aperture: 100mm, FOV: 0.1 degrees, optical magnification: 15 times. According to the above parameters, a set of reasonable optical antenna system has been designed and the test equipment is set up to measure, the test results are all satisfied. This paper has some reference value for the design and test of laser communication optical antenna.
? 2019 SPIE.
Number of references:13
Main heading:Aberrations
Controlled terms:Antennas - Efficiency - Equipment testing - Manufacture - Nanophotonics - Optical communication - Optical instruments - Optical links - Overhead lines - Signal to noise ratio - Stray light
Uncontrolled terms:Application requirements - Communication wavelengths - High-speed communications - Laser communication terminals - Optical antennae - Optimization design - Research situations - Stray light suppression
Classification code:706.2 Electric Power Lines and Equipment - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 741.1 Light/Optics - 913.1 Production Engineering - 913.4 Manufacturing - 941.3 Optical Instruments
Numerical data indexing:Size 1.00e-01m, Size 1.55e-06m
DOI:10.1117/12.2506592

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183705805164
Title:Optimized design of an emerging optical imager using compressive sensing
Authors:Liu, Gang (1, 2); Wen, Desheng (1); Song, Zongxi (1); Li, Zhixin (1, 2); Zhang, Weikang (1, 2); Wei, Xin (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi Province; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Song, Zongxi(zxsong@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:110
Issue date:February 2019
Publication year:2019
Pages:158-164
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:The emerging optical imager utilizes Fourier-domain interferometry and can reduce system weight, size and power by an order of magnitude compared to conventional optical telescopes at the same resolution. The compressive sensing theory demonstrates that incomplete and noisy measurements may actually suffice for accurate reconstruction of compressible or sparse signals. In this paper, we propose an optimized design of the emerging optical imager based on compressive sensing theory. It simplifies data acquisition structure and reduces data transmission burden. In addition, the system robustness is improved.
? 2018 Elsevier Ltd
Number of references:42
Main heading:Image compression
Controlled terms:Compressed sensing - Data acquisition - Interferometry - Optical instruments
Uncontrolled terms:Compressive sensing - Fourier domain interferometry - Noisy measurements - Optimized designs - Photonic integrated circuits - Sparse signals - System robustness
DOI:10.1016/j.optlastec.2018.08.046
Funding details: Number: -, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: Youth Innovation Promotion Association;
Funding text:This work is supported by China Lunar Exploration Project (CLEP) and Youth Innovation Promotion Association , CAS.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535037
Title:Angular micro-vibration test of an agile satellite high resolution camera based on liner accelerometer
Authors:Cui, Kai (1); Zheng, Zhiqi (1); Gao, Xiong (1); Yang, Yongqing (1); Li, Zhiguo (1); Li, Shuxiu (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:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:The angular micro-vibration of a high resolution camera mounting on an agile satellite was achieved based on pairs of liner accelerometers alignment and numerical integration method. Three pairs of sensors were mounted at different portion of the satellite for studying the structure transfer character, including the Reaction Wheel (RW)interface, the camera interface and the camera tail. The results showed that the RW original micro-vibration standard deviation (STD) output acquired at the RW interference was 1.63μrad at RW 400rpm and increased to 2.43μrad when the RW speed up to 800rpm. When transferring from RW to the camera interface, the angular vibration response STD was attenuated to 0.31μrad@400rpm and 0.27μrad@800rpm, and finally to the camera tail the angular vibration response STD became 0.31μrad@400rpm and 0.30μrad@800rpm. We can see that the satellite-camera structure has a good attenuation effect on the micro-vibration, the output angular micro-vibration STD is about 0.31μrad with an input of 1.63μrad~2.43μrad. the stiffness of the camera is pretty good, ensuring that the micro-vibration STD difference between the camera flange and the camera tail is smaller 0.03μrad. In addition, we found that the FOGs useful bandwidth wasn't insufficient when acquiring about 340Hz main frequency vibration signal in our case, even though a higher stiffness flange was recommended which connecting the FOG and camera.
? 2019 SPIE.
Number of references:12
Main heading:Vibrations (mechanical)
Controlled terms:Accelerometers - Cameras - Fiber optics - Flanges - Gyroscopes - Micro satellites - Numerical methods - Photonics - Stiffness - Velocity control - Wheels
Uncontrolled terms:Angular vibrations - Attenuation effect - Fiber optic gyroscopes - High resolution camera - Microvibrations - Numerical integration methods - Reaction wheels - Spatial resolution
Classification code:601.2 Machine Components - 619.1.1 Pipe Accessories - 731.3 Specific Variables Control - 741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 921.6 Numerical Methods - 931.1 Mechanics - 943.1 Mechanical Instruments - 951 Materials Science
Numerical data indexing:Frequency 3.40e+02Hz, Rotational_Speed 4.00e+02RPM, Rotational_Speed 8.00e+02RPM
DOI:10.1117/12.2521437

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506430680
Title:Modified phase diversity technique to eliminate Poisson noise for reconstructing high-resolution images
Authors:Zhang, Ling (1, 2); Zhao, Hui (1); Yi, Hongwei (1); Fan, Xuewu (1); Xie, Xiaopeng (1, 2)
Author affiliation:(1) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710019, 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:10838
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Issue date:2019
Publication year:2019
Article number:108380R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623187
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144225
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Phase diversity technique (PD) is a widely known method to estimate wave-front aberration of optical imaging system and to obtain reconstructed high-resolution image after degradation. However, when detecting weak or low light object in space, Poisson noise, as the main source of noise, has a serious impact on the accuracy of the PD's two main function. Hence, we firstly propose a modified PD combined with Non-local Means (NLM) algorithm to reduce the sensitivity of PD towards the Poisson noise. The numerical simulations demonstrate that our approach compared with the traditional PD has a significant improvement in terms of both the wave-front residual root-mean-square error (RMS) and the structural similarity index metrics (SSIM). The wave-front residual RMS decreases by approximately 51% across the Poisson noise levels ranging from 24.48 dB to 61.02 dB. The overall decline range of SSIM significantly decreases from 47% to 17%, and the average of SSIM increases from 84% to 91%. The modified PD would be useful in the AO system with active Poisson noise.
? 2019 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:12
Main heading:Aberrations
Controlled terms:Image denoising - Image reconstruction - Image resolution - Imaging systems - Manufacture - Mean square error - Wavefronts
Uncontrolled terms:High resolution image - Non local means (NLM) - Optical imaging system - Phase diversity - Poisson noise - Root mean square errors - Structural similarity indices - Wave-front sensing
Classification code:537.1 Heat Treatment Processes - 716.1 Information Theory and Signal Processing - 746 Imaging Techniques - 922.2 Mathematical Statistics
Numerical data indexing:Decibel 2.45e+01dB to 6.10e+01dB, Percentage 4.70e+01% to 1.70e+01%, Percentage 5.10e+01%, Percentage 8.40e+01% to 9.10e+01%
DOI:10.1117/12.2505019
Funding details: Number: -, Acronym: -, Sponsor: Chinese Academy of Agricultural Sciences;
Funding text:The research was supported by: (1) Shaanxi New Science and Technology Stars Program. (2) The Western Light Program of Chinese Academy of Science under contract No. XAB2015A09. (3) ’135’ Development Program of Xi’an Institute of Optics and Precision Mechanics of CAS.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183405732339
Title:Adaptive-window angular spectrum algorithm for near-field ptychography
Authors:Pan, An (1, 2); Zhou, Meiling (1, 2); Zhang, Yan (1, 2); Min, Junwei (1); Lei, Ming (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; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yao, Baoli(yaobl@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:430
Issue date:1 January 2019
Publication year:2019
Pages:73-82
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Near-field ptychography provides advantages over far-field ptychography that large field-of-view (FOV) can be imaged with fewer diffraction images, and with weaker requirements on the detector dynamic range and beam coherence, which has drawn attention recently. However, the propagation distance of traditional angular spectrum (AS) method is limited and the reconstruction of the smallest resolvable object detail is restricted by the sensor's pixel size. To this end, we propose an adaptive-window angular spectrum (AWAS) algorithm to solve both problems by adding the window adaptively associated with the propagation distance and avoid the extra computations via extra scaling factors. Meanwhile, it features validity for the independent sample size and the sample number on the observation plane. This algorithm is strictly deduced from the Rayleigh–Sommerfeld formula and based on the linear convolution, which can be evaluated by fast Fourier transform effectively. The burden of calculations is comparable to traditional AS method. The performance has been achieved both in two-dimensional and three-dimensional near-field ptychography with simulations and experiments. This method will make near-field ptychography more practical and can be used in X-ray or electron-microscopy and other computational imaging techniques.
? 2018
Number of references:40
Main heading:Image processing
Controlled terms:Diffraction - Fast Fourier transforms - Spectrum analysis
Uncontrolled terms:Computational imaging - Fourier optics and signal processing - Independent samples - Large field of views - Linear convolution - Phase retrieval - Propagation distances - Ptychography
Classification code:921.3 Mathematical Transformations
DOI:10.1016/j.optcom.2018.08.035
Funding details: Number: -, Acronym: -, Sponsor: University of Sheffield;Number: -, Acronym: -, Sponsor: University of Texas at Austin;Number: -, Acronym: UCAS, Sponsor: University of Chinese Academy of Sciences;Number: 61377008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Xidian University;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by Natural Science Foundation of China (NSFC) ( 61377008 and 81427802 ). An Pan thank Dr. Maosen Li (Xidian University, China), Dr. Peng Li (University of Sheffield, UK) and Prof.?Shiyi Shi (University of Chinese Academy of Sciences, China) for help and guidance in establishing the experimental apparatus, and Dr. Yuege Xie (University of Texas at Austin, USA) for valuable comments on earlier versions of this manuscript. Appendix

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.ErratuFlg:2001631657

 

Accession number:20184706111952
Title:Query-aware sparse coding for web multi-video summarization
Authors:Ji, Zhong (1); Ma, Yaru (1); Pang, Yanwei (1); Li, Xuelong (2)
Author affiliation:(1) School of Electrical and Information Engineering, Tianjin University, Tianjin; 300072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Pang, Yanwei(pyw@tju.edu.cn)
Source title:Information Sciences
Abbreviated source title:Inf Sci
Volume:478
Issue date:April 2019
Publication year:2019
Pages:152-166
Language:English
ISSN:00200255
CODEN:ISIJBC
Document type:Journal article (JA)
Publisher:Elsevier Inc.
Abstract:Given the explosive growth of online videos, it is becoming increasingly important to relieve the tedious work of browsing and managing the video content of interest. Video summarization aims at providing such a technique by transforming one or multiple videos into a compact one. However, conventional multi-video summarization methods often fail to produce satisfying results as they ignore the users’ search intents. To this end, this paper proposes a novel query-aware approach by formulating the multi-video summarization in a sparse coding framework, where the web images searched by a query are taken as the important preference information to reveal the query intent. To provide a user-friendly summarization, this paper also develops an event-keyframe presentation structure to present keyframes in groups of specific events related to the query by using an unsupervised multi-graph fusion method. Moreover, we release a new public dataset named MVS1K, which contains about 1000 videos from 10 queries and their video tags, manual annotations, and associated web images. Extensive experiments on the MVS1K and TVSum datasets demonstrate that our approaches produce competitively objective and subjective results.
? 2018
Number of references:46
Main heading:Video signal processing
Controlled terms:Codes (symbols) - Image coding - Video recording
Uncontrolled terms:Explosive growth - Manual annotation - Multi-video - Multi-video summarizations - Preference information - Query-aware - Sparse coding - Video summarization
Classification code:716.4 Television Systems and Equipment - 723.2 Data Processing and Image Processing
DOI:10.1016/j.ins.2018.09.050
Funding details: Number: 61472273, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61771329, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61632018, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grants 61472273, 61632018, and 61771329 .

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407330507
Title:A Method for Detecting Small and Weak Defect Targets Based on Neighborhood Vector PCA Image Enhancement
Title of translation:基于邻域向量主成分分析图像增强的弱小损伤目标检测方法
Authors:Wang, Zheng-Zhou (1); Li, Gang (1); Wang, Wei (1); Xia, Yan-Wen (2); Wang, Li (1); Tan, Meng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; Shanxi; 710119, China; (2) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang; Sichuan; 621900, China
Corresponding author:Xia, Yan-Wen(xiayanwen1972@163.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:7
Issue date:July 1, 2019
Publication year:2019
Article number:0710001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A method for detecting small and weak damaged targets based on Neighborhood Vector PCA (NVPCA) image enhancement was proposed. The main idea is that each pixel and its 8 neighborhood pixels in the damaged image are treated as a column vector to participate in the operation. All column vectors generated by each pixel will construct a 9-dimensional data cube. After PCA transformation, the correlation between the middle and neighborhood pixels is eliminated, so that the main information of the 9-dimensional data cube will be set in the first dimension, and the transformed first dimension data is NVPCA image. When the NVPCA image is processed again by LCM method, a better image enhancement effect is obtained. In addition, the region growth method is used to separate the damage target from background. The experimental results show that the method can detect the damage target with the size of 1 pixel and located in local bright area, and meet the requirement of on-line optical damage detection system for the accuracy of the damage target.
? 2019, Science Press. All right reserved.
Number of references:16
Main heading:Image enhancement
Controlled terms:Damage detection - Defects - Metadata - Pixels - Principal component analysis - Vectors
Uncontrolled terms:Column vector - Data cube - Dimension Data - Enhancement effects - Local contrast - Optical damages - Region growing methods - Region growth
Classification code:921.1 Algebra - 922.2 Mathematical Statistics - 951 Materials Science
DOI:10.3788/gzxb20194807.0710001
Funding details: Number: 11327303, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61405244, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (Nos. 11327303, 61405244), the National High Technology Research and Development Program (No. 051Z331BOA).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192206978505
Title:New Algorithm of Response Curve for Fitting HDR Image
Authors:Qiu, Shi (1); Li, Xuemei (2); Huang, Yongdong (3); Li, Zhengzhou (4); Chen, Xun (5); Chen, Yuyang (2)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) College of Information Science and Technology, Chengdu University of Technology, Chengdu; 610059, China; (3) Institute of Image Processing and Understanding, North Minzu University, Yinchuan; 750021, China; (4) College of Communication Engineering, Chongqing University, Chongqing; 400044, China; (5) Department of Electronic Science and Technology, University of Science and Technology of China, Hefei; 230027, China
Corresponding author:Li, Xuemei(a13579xm@sina.com)
Source title:International Journal of Pattern Recognition and Artificial Intelligence
Abbreviated source title:Int J Pattern Recognit Artif Intell
Issue date:2019
Publication year:2019
Language:English
ISSN:02180014
CODEN:IJPIEI
Document type:Article in Press
Publisher:World Scientific Publishing Co. Pte Ltd
Abstract:Based on the process of generating HDR images from LDR image sequences with different light exposures in the same scene, a new fitting method of camera response curves is proposed to solve the problem that the boundary of the fitting algorithm of camera response curves will be blurred and it is difficult to determine and verify the accuracy of the fitting curves. The optimal response curve is fitted by increasing LDR images step by step through considering the pixel value and texture characteristics. In order to validate the fitting effect of curves, we compare the photographed images and the real images in different time intervals on the basis of HDR images and response curves. We use RGB and gray image experiments to compare the current mainstream algorithms and the accuracy of our proposed algorithm can reach 96%, which has robustness.
? 2020 World Scientific Publishing Company.
Main heading:Image texture
Controlled terms:Cameras - Curve fitting - Textures
Uncontrolled terms:Camera response - Exposure-time - High dynamic range - Low dynamic range - Texture features
Classification code:723.2 Data Processing and Image Processing - 742.2 Photographic Equipment - 921.6 Numerical Methods
Numerical data indexing:Percentage 9.60e+01%
DOI:10.1142/S0218001420540014

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192307001976
Title:Excessively tilted fiber grating based Fe3O4 saturable absorber for passively mode-locked fiber laser
Authors:Wang, Hushan (1, 2, 3); Zhao, Fengyan (1, 2, 3); Yan, Zhijun (1, 4); Hu, Xiaohong (1); Zhou, Kaiming (1, 5); Zhang, Ting (1, 2); Zhang, Wei (1); Wang, Yishan (1, 3); Zhao, Wei (1, 3); Zhang, Lin (5); Sun, Chuandong (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; 10049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (4) School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan, Hubei; 430074, China; (5) Institute of Photonic Technologies, Aston University, Birmingham; B4 7ET, United Kingdom
Corresponding author:Zhao, Wei(weiz@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:11
Issue date:2019
Publication year:2019
Pages:15693-15700
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A novel approach to saturable absorber (SA) formation is presented by taking advantage of the mode coupling property of excessively tilted fiber grating (Ex-TFG). Stable mode-locked operation can be conveniently achieved based on the interaction between Ex- TFG coupled light and deposited ferroferric-oxide (Fe3O4) nanoparticles. The central wavelength, bandwidth and single pulse duration of the output are 1595 nm, 4.05 nm, and 912 fs, respectively. The fiber laser exhibits good long-term stability with signal-to-noise ratio (SNR) of 67 dB. For the first time, to the best of our knowledge, Ex-TFG based Fe3O4 SA for mode-locked fiber laser is demonstrated.
? 2019 Optical Society of America.
Number of references:46
Main heading:Mode-locked fiber lasers
Controlled terms:Fiber lasers - Fibers - Iron oxides - Magnetite - Passive mode locking - Saturable absorbers - Signal to noise ratio
Uncontrolled terms:Central wavelength - Ferroferric oxides - Long term stability - Mode coupling - Passively mode-locked fiber lasers - Single pulse - Stable modes - Tilted fiber gratings
Classification code:716.1 Information Theory and Signal Processing - 744.1 Lasers, General - 744.4 Solid State Lasers - 804.2 Inorganic Compounds
Numerical data indexing:Decibel 6.70e+01dB, Size 1.60e-06m, Size 4.05e-09m, Time 9.12e-13s
DOI:10.1364/OE.27.015693

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006929738
Title:High-Power Single-Longitudinal-Mode DFB Semiconductor Laser Based on Sampled Moiré Grating
Authors:Liu, Shengping (1); Wu, Hao (2); Shi, Yuechun (1, 3); Qiu, Bocang (4); Xiao, Rulei (1); Chen, Min (1); Xue, Haiyun (5); Hao, Lijun (1); Zhao, Yong (1); Lu, Jun (1); Chen, Xiangfei (1)
Author affiliation:(1) National Laboratory of Solid State Microstructure, College of Engineering and Applied Sciences, Nanjing University, Nanjing; 210093, China; (2) State Key Laboratory of Luminescence and Applications, Changchun; 130033, China; (3) Nanjing University (Suzhou) High-Tech Institute, Suzhou; 215123, China; (4) State Key of Transient Optics and Photonics, Xi'an; 710119, China; (5) System Packaging and Integration Research Center, Beijing; 100029, China
Corresponding author:Shi, Yuechun(shiyc@nju.edu.cn)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:31
Issue:10
Issue date:May 15, 2019
Publication year:2019
Pages:751-754
Article number:8672593
Language:English
ISSN:10411135
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In this mymargin letter, we experimentally demonstrated a 1550-nm high-power single-longitudinal-mode (SLM) distributed feedback (DFB) semiconductor laser based on sampled moiré grating (SMG). By designing the sampling structure with micrometer scale, moiré grating (MG) can be equivalently realized along the laser cavity. Then, we can reduce the coupling coefficient near laser facet so as to increase the output power. The cavity length and ridge width of the fabricated laser are 1.0 mm and 3.0 μm, respectively. The measured threshold current and the slope efficiency are 30.0 mA and 0.36 mW/mA at the heat-sink temperature of 25 °C, respectively. When the injection current is 800.0 mA, the maximum output power is about 183.0 mW. The saturation power is significantly improved compared with conventional DFB laser with uniform sampled grating (USG), which was fabricated on the same wafer. In addition, a four-channel DFB laser array based on SMG was also fabricated on the same wafer, showing good wavelength uniformity.
? 2019 IEEE.
Number of references:24
Main heading:Semiconductor lasers
Controlled terms:Distributed feedback lasers - Semiconductor junctions - Silicon wafers
Uncontrolled terms:Coupling coefficient - DFB semiconductor lasers - Distributed feedback semiconductor laser - Heat sink temperature - High power - Integrated optics devices - Maximum output power - Single longitudinal mode
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 744.1 Lasers, General - 744.4.1 Semiconductor Lasers
Numerical data indexing:Electric_Current 3.00e-02A, Electric_Current 8.00e-01A, Power 1.83e-01W, Size 1.00e-03m, Size 1.55e-06m, Size 3.00e-06m, Temperature 2.98e+02K
DOI:10.1109/LPT.2019.2906562
Funding details: Number: 11574141, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61435014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61504058, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61504170, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the Chinese National Key Basic Research Special Fund under Grant 2017YFA0206401, in part by the Jiangsu Science and Technology Project under Grant BE2017003-2, in part by the National Natural Science Foundation of China under Grant 61435014, Grant 11574141, Grant 61504170, and Grant 61504058, in part by the Natural Science Foundation of Jiangsu Province BK20160907, in part by the Suzhou Technological Innovation of Key Industries under Grant SYG201844, and in part by the Fundamental Research Funds for the Central Universities under Grant 021314380113.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190306396646
Title:Muti-stage learning for gender and age prediction
Authors:Fang, Jie (1, 2); Yuan, Yuan (3); Lu, Xiaoqiang (1); Feng, Yachuang (1)
Author affiliation:(1) Center for Optical Imagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Optical Imagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xian; 710072, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:334
Issue date:21 March 2019
Publication year:2019
Pages:114-124
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:Automatic gender and age prediction has become relevant to an increasing amount of applications, particularly under the rise of social platforms and social media. However, the performances of existing methods on real-world images are still not satisfactory as we expected, especially when compared to that of face recognition. The reason is that, facial images for gender and age prediction have inherent small inter-class and big intra-class differences, i.e., two images with different skin colors and same age category label have big intra-class difference. However, most existing methods have not constructed discriminative representations for digging out these inherent characteristics very well. In this paper, a method based on muti-stage learning is proposed: The first stage is marking the object regions with an encoder-decoder based segmentation network. Specifically, the segmentation network can classify each pixel into two classes, “people” and others, and only the “people” regions are used for the subsequent processing. The second stage is precisely predicting the gender and age information with the proposed prediction network, which encodes global information, local region information and the interactions among different local regions into the final representation, and then finalizes the prediction. Additionally, we evaluate our method on three public and challenging datasets, and the experimental results verify the effectiveness of our proposed method.
? 2019 Elsevier B.V.
Number of references:59
Main heading:Forecasting
Controlled terms:Face recognition
Uncontrolled terms:Age predictions - Encoder-decoder - Facial images - Global informations - Inherent characteristics - Muti-stage learning - Object region - Real-world image
DOI:10.1016/j.neucom.2018.12.073
Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by the National Key R&D Program of China (Grant No. 2017YFB0502900), the National Natural Science Foundation of China (Grant Nos. 61632081 , 61772510 , and 61702498 ), the Young Top-Notch Talent Program of Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC015 ), and the CAS Light of West China Program (Grant No. XAB2017B15).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007233782
Title:23.9 W, 985 fs Chirped Pulse Amplification System Based on Yb:YAG Rod Amplifier
Authors:Wang, Na Na (1, 2); Wang, Xiang Lin (1); Zhang, Ting (1); Zhang, Wei (1); Hu, Xiao Hong (1); Yuan, Hao (1); Li, Feng (1); Wang, Yi Shan (1, 2); Zhao, Wei (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Li, Feng(laser_lifeng@opt.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:11
Issue:4
Issue date:August 2019
Publication year:2019
Article number:8755449
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:A stable and simple Yb:YAG rod amplifier based on chirped pulse amplification in a water cooling system has been demonstrated. The output power of 38 W at a 250 kHz repetition rate with a spectrum width of 4 nm centered at 1030 nm, which support Fourier-transform limited pulse duration of 389 fs has been generated. The compressed power of 23.9 W with pulse duration of 985 fs has been obtained with a chirped volume Bragg grating compressor. The power stability is measured to be 1.414% when the output power is 35 W. The system is worthwhile to popularize for its good performance and inexpensive cost.
? 2009-2012 IEEE.
Number of references:14
Main heading:Pulse repetition rate
Controlled terms:Chirp modulation - Ultrashort pulses - Yttrium aluminum garnet
Uncontrolled terms:Chirped pulse amplification systems - Chirped pulse amplifications - Power stability - Pulse durations - Repetition rate - Ultrafast pulse - Volume Bragg gratings - YAG rod
Classification code:716 Telecommunication; Radar, Radio and Television - 744.1 Lasers, General
Numerical data indexing:Frequency 2.50e+05Hz, Percentage 1.41e+00%, Power 2.39e+01W, Power 3.50e+01W, Power 3.80e+01W, Size 1.03e-06m, Size 4.00e-09m, Time 3.89e-13s, Time 9.85e-13s
DOI:10.1109/JPHOT.2019.2926840

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006593832
Title:A Characteristic Extraction Algorithm Based on Blocking Star Images
Authors:Du, Yun (1, 2, 3); Wen, Desheng (1); Liu, Guizhong (2); Qiu, Shi (1); Li, Ni (4, 5)
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) State Key Laboratory of Virtual Reality, Technology and Systems, Beihang University, Beijing; 100083, China; (5) School of Automation Science and Electrical Engineering, Beihang University, Beijing; 100083, China
Corresponding author:Qiu, Shi(qiushi215@163.com)
Source title:International Journal of Pattern Recognition and Artificial Intelligence
Abbreviated source title:Int J Pattern Recognit Artif Intell
Volume:33
Issue:9
Issue date:August 1, 2019
Publication year:2019
Article number:1954028
Language:English
ISSN:02180014
CODEN:IJPIEI
Document type:Journal article (JA)
Publisher:World Scientific Publishing Co. Pte Ltd
Abstract:The star images obtained through the CCD camera can visually display the star structure. In order to get the wide starry image, we need to extract the characteristics of star images to achieve the star image stitching. In the star images, star points, whose characteristics are limited, are easily influenced by noise and are also difficult to extract. The number of stars is too large to stitch accurately. Thus, we propose a stitching algorithm based on blocking star images. First, we establish the maximum intensity projection model based on time sequence to locate the star points accurately. Then, according to the relative positions of star points, the block model is introduced to realize the establishment of the characteristics. Finally, the star image stitching is achieved from the perspective of the characteristic similarity. The experiments illustrate that CM (combination measure) reaches 0.87, and the proposed algorithm has better anti-noise performance and robustness.
? 2019 World Scientific Publishing Company.
Number of references:31
Main heading:Image processing
Controlled terms:CCD cameras - Electric fuses - Stitching (metal joining)
Uncontrolled terms:block - Block modeling - Characteristic extraction - characteristics - Maximum intensity projection - Relative positions - Star images - Time sequences
Classification code:538.2.1 Welding Processes - 704.1 Electric Components - 714.2 Semiconductor Devices and Integrated Circuits
DOI:10.1142/S0218001419540284
Funding details: Number: LSIT201717G, Acronym: -, Sponsor: -;Number: XAB2016B23, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by Chinese Academy of Sciences under project XAB2016B23, project name Light of West China. And the Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, LSIT201717G.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907194300
Title:Retrieval of marine inorganic particle concentrations in turbid waters using polarization signals
Authors:Liu, Jia (1); Liu, Jiahang (1, 5); He, Xianqiang (2, 3); Tian, Liqiao (4); Bai, Yan (2, 3); Chen, Tieqiao (1); Wang, Yihao (1); Zhu, Feng (1); Pan, Delu (2, 3)
Author affiliation:(1) Laboratory of Remote Sensing and Intelligent information System, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) Institute of Oceanography, Shanghai Jiao Tong University, Shanghai; Shanghai, China; (4) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China; (5) College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, China
Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)
Source title:International Journal of Remote Sensing
Abbreviated source title:Int. J. Remote Sens.
Issue date:2019
Publication year:2019
Language:English
ISSN:01431161
E-ISSN:13665901
CODEN:IJSEDK
Document type:Article in Press
Publisher:Taylor and Francis Ltd.
Abstract:The polarization properties of water-leaving radiance (Lw) contains rich information about hydrosols, which has great potential to improve the retrieval accuracy of oceanic constituents. However, current ocean colour inversion algorithms are only based on the water-leaving radiation intensity, and the polarization properties have been ignored. Here, based on the radiative transfer simulations, the possibility of retrieving suspended particulate matter in turbid waters based on the polarization properties was investigated. The results showed that the degree of polarization (DOP) of the upward radiation just beneath the water surface has significant angular and spectral variations with respect to the observational geometries, inorganic particle concentrations, solar zenith angles and aerosol optical thicknesses (AOTs). The directional variations in DOP along with viewing zenith angles are typically characterized by a double peak feature with a maximum of 0.5 in the principal plane. In addition, the DOP in the visible bands is highly sensitive to inorganic particle concentrations. The DOP gradually decreases from 412 nm to 555 nm and increases with wavelengths beyond 555 nm, particularly for wavelengths larger than 620 nm. An empirical relationship between the DOP at 670 nm and the inorganic particle concentration was established for different viewing geometries with determination coefficient (R2) up to 0.9996. Overall, our simulation results indicate that the polarization property of underwater upward radiance has great potential for suspended particulate matter retrieval in coastal waters.
? 2019, ? 2019 Informa UK Limited, trading as Taylor & Francis Group.
Number of references:64
Main heading:Polarization
Controlled terms:Biogeochemistry - Particles (particulate matter)
Uncontrolled terms:Degree of polarization - Determination coefficients - Directional variation - Empirical relationships - Polarization properties - Radiative transfer simulations - Suspended particulate matters - Water-leaving radiances
Classification code:481.2 Geochemistry - 951 Materials Science
DOI:10.1080/01431161.2019.1641248

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006583840
Title:Vignetting effect in Fourier ptychographic microscopy
Authors:Pan, An (1, 2); Chao Zuo (3); Yuege Xie (4); Ming Lei (1); Baoli Yao (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) Smart Computational Imaging (SCI) Laboratory, Nanjing University of Science and Technology, Nanjing; 210094, China; (4) Institute for Computational Engineering and Sciences, University of Texas at Austin, TX; 78712, United States
Corresponding author:Chao Zuo(surpasszuo@163.com)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:120
Issue date:September 2019
Publication year:2019
Pages:40-48
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:In the usual model of Fourier ptychographic microscopy (FPM), the coherent microscopic system is approximated by being taken as linear space-invariant (LSI) with transfer function determined by a complex pupil function of the objective. However, in real experimental conditions, several unexpected “semi-bright and semi-dark” images with strong vignetting effect can be observed when the sample is illuminated by the LEDs within the “transition zone” between bright field and dark field. These imperfect images, apparently, are not coincident with the LSI model and could deteriorate the reconstruction quality severely. Herein, we investigate the cause and the impact of model misfit based on ray-based and rigorous wave optics-based analysis. Our analysis shows that for a practical FPM microscope with a low magnification objective and a large field-of-view (FOV), the LSI model breaks down as a result of diffraction at other stops or apertures associated with different lens elements. A modified version of the linear space-variant (LSV) model is derived for quantitative analysis. The spectrum of the object will be modulated unexpectedly by a quadratic phase term relatively if assuming the shape of pupil function is invariable. Two countermeasures are also presented and experimentally verified to bypass or alleviate the vignetting-induced reconstruction artifacts. An adaptive update order and initial guess strategy is proposed and demonstrated for better reconstructions. Our work gives a deeper insight into the vignetting effect on wide-FOV imaging and provides a useful guide for easily achieving improved FPM reconstructions that bypass the adverse effect.
? 2019 Elsevier Ltd
Number of references:38
Main heading:Image processing
Controlled terms:Fourier transforms - LSI circuits - Repair
Uncontrolled terms:Coherent imaging systems - Experimental conditions - Fourier - Fourier optics and signal processing - Large field of views - Reconstruction artifacts - Reconstruction quality - Vignetting
Classification code:714.2 Semiconductor Devices and Integrated Circuits - 913.5 Maintenance - 921.3 Mathematical Transformations
DOI:10.1016/j.optlaseng.2019.02.015
Funding details: Number: 11574152, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61377008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61505081, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61722506, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 81427802, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: BK20170034, Acronym: -, Sponsor: Outstanding Youth Foundation of Jiangsu Province of China;
Funding text:B. Yao thanks the funds from National Natural Science Foundation of China (NSFC) (81427802 and 61377008). C. Zuo thanks the funds from NSFC (61722506; 61505081 and 11574152), and Outstanding Youth Foundation of Jiangsu Province of China (BK20170034). An Pan thanks Dr. Maosen Li (Xidian University, China) for the valuable and helpful discussions.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006603239
Title:Optimum design of electron bombarded active pixel sensor for low-level light single photon imaging
Authors:Bai, Jinzhou (1, 2); Wang, Bo (1); Bai, Yonglin (1); Cao, Weiwei (1); Yang, Yang (1); Lei, Fanpu (1); Su, Dan (2)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100094, China
Corresponding author:Wang, Bo(wbo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10843
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Issue date:2019
Publication year:2019
Article number:108430V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623286
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:145452
Sponsor:Institute of Optics and Electronics (IOE), Chinese Academy of Sciences; The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Low-Level Light Imaging(LLLI) devices are now been widely used in military, astronomy, scientific, and even in surveillance for our daily uses. The traditional devices like ICCD, EBCCD, EMCCD, which either complicated in structure or require extra cooling system. However, a novel device called Electron Bombarded Active Pixel Sensor(EBAPS) has been developed, it is a proximity focused device which lead photoelectrons produced by photocathode hitting directly towards back illuminated CMOS and cause the semiconductor bombard phenomenon to amplification and then being readout. EBAPS is relatively small in size, less weight, with high sensitivity, and can be used to detect single photon event, etc. Although it has been proven to have excellent sensitivity in the field of LLLI, the performance today is still considered far from its maximum potential. Here, we modeled the structure of EBAPS and studied the factors influencing the performance of the device. By selecting proper parameters like proximity distance, acceleration voltage, photocathode quantum efficiency, etc., we achieved the single photon image mode with a satisfactory sensitivity. Besides, we simulated the electron scattering trajectories among the semiconducting multiplication area by using Monte Carlo method, we compared the simulation results in different conditions and successfully in finding the optimum parameter, which achieved a relatively high sensitivity. The simulation results in this paper could have a profound theoretical foundation in developing higher gain EBAPS.
? 2019 SPIE ·
Number of references:10
Main heading:Particle beams
Controlled terms:Efficiency - Electron scattering - Manufacture - Monte Carlo methods - Optoelectronic devices - Photocathodes - Photons - Pixels
Uncontrolled terms:Acceleration voltages - Charge collection efficiency - EBAPS - LLLI - Single photon detection - Single-photon imaging - Theoretical foundations - Traditional devices
Classification code:741.3 Optical Devices and Systems - 913.1 Production Engineering - 913.4 Manufacturing - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics
DOI:10.1117/12.2506350
Funding details: Number: 2015DFA10140, Acronym: ISTC, Sponsor: International Science and Technology Center;
Funding text:This paper was supported by International Science & Technology Cooperation Program of China (No. 2015DFA10140), and thanks for the Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS’s help in our research.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192106950947
Title:Three-dimensional thermal model of high-power semiconductor lasers
Authors:Wu, Di-Hai (1, 2, 3); Zah, Chung-En (2); Liu, Xingsheng (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi'an High-Tech Zone, Xi'an, Shaanxi; 710119, China; (2) Focuslight Technologies Inc., No. 56 Zhangba 6th Road, Xi'an High-Tech Zone, Xi'an, Shaanxi; 710077, China; (3) Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District, Beijing; 100049, China
Corresponding author:Liu, Xingsheng(liuxs@focuslight.com)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:14
Issue date:2019
Publication year:2019
Pages:3892-3901
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In this paper, 3-D, steady-state, analytical thermal models of high-power single-emitter semiconductor lasers (SEs) and laser diode arrays (LDAs) are derived, considering the heat conduction in multi-layered laser structures. Heat flow in the laser chips for an epi-down bonded SE and LDA is described using this model, and it is observed that the laser chips contribute to 8% and 6% of total heat dissipation for the SE and LDA, respectively. The submount size requirement for this model is discussed by revealing the heat flow in the submount. Through finite element simulations, the solution accuracy for the lasers with non-ideal submounts is confirmed. Finally, the performance of our proposed analytical models is verified by finite element simulations and experimental measurements based on the wavelength shift method.
? 2019 Optical Society of America.
Number of references:38
Main heading:Semiconductor lasers
Controlled terms:Finite element method - Heat conduction - High power lasers - Laser Doppler velocimeters - Thermography (temperature measurement)
Uncontrolled terms:Finite element simulations - High power semiconductor laser - Laser diode arrays - Laser structures - Single emitter - Solution accuracy - Three dimensional thermal model - Wavelength shift
Classification code:641.2 Heat Transfer - 744 Lasers - 921.6 Numerical Methods - 944.6 Temperature Measurements
Numerical data indexing:Percentage 6.00e+00%, Percentage 8.00e+00%
DOI:10.1364/AO.58.003892
Funding details: Number: 61334010, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61334010); National Key RD Program of China (2018YFB1107302).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507380747
Title:Effect of Ba(PO3)2 addition on the optical properties of Tm3+-doped fluorophosphate glasses
Authors:Sun, Xin (1, 2); She, Jiangbo (1); Li, Xiaohui (2); Lu, Min (1); Wang, Pengfei (1); Li, Dongdong (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) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710000, China; (3) School of Electronic Engineering, Xi'an University of Post and Telecommunications, Xi'an; 710121, China
Source title:Optical Materials Express
Abbreviated source title:Opt. Mater. Express
Volume:9
Issue:3
Issue date:2019
Publication year:2019
Pages:1233-1245
Language:English
E-ISSN:21593930
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Tm3+-doped fluorophosphate glasses with varying Ba(PO3)2 content were prepared by the melt quenching technique and their thermal and optical properties were investigated by studying differential scanning calorimetry, Raman spectra, fluorescence spectra, decay curves, transmission and absorption spectra. The Judd-Ofelt theory was applied to calculate the intensity parameters of the resultant glass. The glass forming criterion was obtained to be 146 °C. The gain coefficient and fluorescence lifetime of Tm3+-doped fluorophosphate glass with 20 mol% Ba(PO3)2 were 3.045 × 10-21 cm2 × ms and 0.406 ms, respectively, which are the highest value among the fluorophosphate glasses with similar components to the best of our knowledge. These results clearly indicate that the prepared fluorophosphate glass is an attractive candidate for 2 μm lasers and as a gain media for optical amplifier applications.
? 2019 Optical Society of America.
Number of references:60
Main heading:Optical properties
Controlled terms:Barium compounds - Differential scanning calorimetry - Fluorescence - Glass - Judd-Ofelt theory - Thulium compounds
Uncontrolled terms:Doped fluorophosphate glass - Fluorescence lifetimes - Fluorescence spectra - Fluorophosphate glass - Gain coefficients - Intensity parameters - Melt quenching techniques - Transmission and absorption
Classification code:741.1 Light/Optics - 812.3 Glass - 931.3 Atomic and Molecular Physics - 944.6 Temperature Measurements
Numerical data indexing:Size 2.00e-06m, Temperature 4.19e+02K, Time 4.06e-04s
DOI:10.1364/OME.9.001233
Funding details: Number: 1110010717, Acronym: -, Sponsor: Shaanxi Normal University;Number: 1112010209, Acronym: -, Sponsor: Shaanxi Normal University;Number: 2017M620383, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 61605106, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC No. 61605106); CAS Light of West China Program, Special Research Projects of Department of Education of Shaanxi Provincial (No. 18JK0707); Starting Grants of Shaanxi Normal University (No. 1112010209, 1110010717); Fundamental Research Funds For the Central Universities (GK201802006, 2016CSY024); China Postdoctoral Science Foundation (Grant 2017M620383), The Science and Technology Innovation Commission of ShenZhen (JCYJ20170818141407343).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432473
Title:High reflecting film deposition of all-CFRP mirror
Authors:Wang, Yongjie (1); Wu, Xiaoge (1); Li, Haochuan (1); Xu, Liang (1); Ding, Jiaoteng (1); Xie, Yongjie (1); Ma, Zhen (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 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:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370X
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:To improve the reflecting properties of all CFRP mirror, a high reflecting coating must be prepared on the mirror surface. In this paper, the effect of the roughness, film material and the deposition temperature on the reflecting rate was discussed. In the experiments, it was observed that the film exhibited higher reflecting rate on the smoother surface; meanwhile, the deposition rate must be controlled below the soften point of the surface replicated resin; if not, pits will generate on the surface and reduce reflecting rate. Ag film system exhibited higher reflecting rate than Al films. Finally, a multilayer film Ag and SiO2 was deposited on CFRP mirror, with a reflecting rate over 95% between 450nm and 800 nm.
? 2019 SPIE.
Number of references:7
Main heading:Optical testing
Controlled terms:Deposition rates - Mirrors - Multilayer films - Resins - Silica - Silver - Surface roughness - Telescopes
Uncontrolled terms:Ag films - Deposition temperatures - Film deposition - Film materials - Mirror surfaces - Reflecting coatings - Replication method - soften point
Classification code:547.1 Precious Metals - 741.3 Optical Devices and Systems - 815.1.1 Organic Polymers - 931.2 Physical Properties of Gases, Liquids and Solids
Numerical data indexing:Size 4.50e-07m to 8.00e-07m
DOI:10.1117/12.2504867
Funding details: Number: 51402351, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work has been supported by the National Natural Science Foundation of China under Grant No. 51402351 and Western Light project of China Academy of Sciences.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907216446
Title:Broadband Local Oscillator Free Photonic Microwave Mixer Based on a Coherent Kerr Micro-Comb Source
Authors:Wu, Jiayang (1); Xu, Xingyuan (1); Tan, Mengxi (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Swinburne University of Technology, Centre for Micro-Photonics, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-Energie, Materiaux et Telecommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Source title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Issue date:May 2019
Publication year:2019
Article number:8749146
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:2019 Conference on Lasers and Electro-Optics, CLEO 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:149135
Sponsor:AdValue Photonics; American Elements; Class5 Photonics; Coherent; et al.; GoFoton
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We demonstrate a photonic microwave mixer based on an integrated micro-comb source. We achieve an operation bandwidth of over 40 GHz with a conversion efficiency of -6.8 dB and a spurious suppression ratio of 43.5 dB.
? 2019 The Author(s) 2019 OSA.
Number of references:11
DOI:10.23919/CLEO.2019.8749146
Funding text:This work was by the Australian Research Council Discovery Projects Program (DP150104327) and NSERC/CRC Canada.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107254809
Title:Experimental Studies on Improved Vector Extrapolation Richardson-Lucy Algorithm Used to Realize Wave-front Coded Imaging
Title of translation:改进矢量外推Richardson-Lucy算法在波前编码图像复原中的应用
Authors:Zhao, Hui (1); Xia, Jing-Jing (1, 3); Zhang, Ling (1, 2); Fan, Xue-Wu (1)
Author affiliation:(1) Space Optics Lab, 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; (3) Shaanxi Normal University, Xi'an; 710119, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:6
Issue date:June 1, 2019
Publication year:2019
Article number:0611003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:An improved vector extrapolation based on Richardson-Lucy algorithm was designed by embedding the modified exponent into the vector extrapolation. The structural similarity index was used as a criterion to determine the optimum iterations and optimum combinations of two acceleration factors. Experimental results show that total iterations are reduced approximately 78.9% and visually satisfactory restoration results can be obtained without denoising the restored image further. This work provides a reference for the development of the Richardson-Lucy algorithm in the application of real-time wave-front coded imaging.
? 2019, Science Press. All right reserved.
Number of references:26
Main heading:Wavefronts
Controlled terms:Computerized tomography - Extrapolation - Image coding - Image reconstruction - Restoration - Vectors
Uncontrolled terms:Acceleration factors - Computational imaging - Optimum combination - Richardson-Lucy - Richardson-Lucy algorithms - Structural similarity indices - Wave front coded - Wave-front coding
Classification code:723.5 Computer Applications - 921.1 Algebra - 921.6 Numerical Methods
Numerical data indexing:Percentage 7.89e+01%
DOI:10.3788/gzxb20194806.0611003
Funding details: Number: 61105017, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61107008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China (Nos. 61107008, 61105017).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432480
Title:Supporting structure design between primary and secondary mirrors in a long focal length space optical remote sensor
Authors:Hu, Bin (1, 2); Wu, Mengyuan (1); Ye, Jing (1, 2); Li, Yan (1); Li, Xuyang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing; 100049, China
Corresponding author:Hu, Bin
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083703
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:To ensure the dimensional stability of the opto-mechanical structure of the space optical remote sensor is an important prerequisite for the acquisition of high quality images. The change of the relative position between the primary and secondary mirrors has a great influence on the imaging quality of the long focal length optical remote sensor. Several common forms of supporting structure between the primary and secondary mirrors and the secondary mirror support of lightweight, high stiffness have been analyzed. This paper has designed a baffle tube between primary and secondary mirrors of high modulus carbon fiber M55J/cyanate ester material, carbon fiber composite main body with titanium alloy inserts integral the secondary mirror supporting structure. Through static and dynamic analysis, it is proved that the designed optical remote sensor has good structural stability and dynamic characteristics, and meets the requirements of engineering application.
? 2019 SPIE.
Number of references:10
Main heading:Optical testing
Controlled terms:Carbon fibers - Dimensional stability - Manufacture - Mirrors - Motion compensation - Remote sensing - Telescopes - Titanium alloys
Uncontrolled terms:Carbon fiber composite - Dynamic characteristics - Engineering applications - High modulus carbon fiber - Space optical remote sensor - Static and dynamic analysis - Structural stabilities - Supporting structure
Classification code:537.1 Heat Treatment Processes - 542.3 Titanium and Alloys - 741.3 Optical Devices and Systems - 804 Chemical Products Generally
DOI:10.1117/12.2504859

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192907216588
Title:Tunable Photonic RF Bandpass Filters Based on an 80 Channel Kerr Micro-Comb Source
Authors:Tan, Mengxi (1); Xu, Xingyuan (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)
Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-Energie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China
Source title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Abbreviated source title:Conf. Lasers Electro-Opt., CLEO - Proc.
Part number:1 of 1
Issue title:2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Issue date:May 2019
Publication year:2019
Article number:8749922
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:2019 Conference on Lasers and Electro-Optics, CLEO 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:149135
Sponsor:AdValue Photonics; American Elements; Class5 Photonics; Coherent; et al.; GoFoton
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We demonstrate a tunable photonic RF bandpass filter based on a Kerr micro-comb source providing 80 taps in the C-band. We achieve a widely tunable centre frequency (0.05FSRRF~0.40FSRRF) and 3-dB bandwidth (0.5 ~ 4.6 GHz).
? 2019 The Author(s) 2019 OSA.
Number of references:10
DOI:10.23919/CLEO.2019.8749922

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006931122
Title:Preparation and Characteristics of SiO2/VO2 Double-Layer Thermochromic Coatings for Smart Window
Title of translation:智能窗用热致变色SiO2/VO2双层膜的制备与性能
Authors:Liu, Peng (1); Liang, Liping (1); Xu, Yao (2)
Author affiliation:(1) Institute of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan; Shanxi; 030024, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710000, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:39
Issue:4
Issue date:April 10, 2019
Publication year:2019
Article number:0416001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:SiO2/VO2 thermochromic coatings are prepared via VO2 sintering alone and SiO2/VO2 co-sintering, respectively. The microstructure, thermochromic properties and optical properties of samples are studied. The experimental results show that both the microstructure and the above properties of the coatings are strongly dependent on the deposition process, whereas the type of SiO2 precursor sols only have little effect on the microstructure and even less effect on the thermochromic and optical properties. When the coatings are prepared by the VO2 alone-sintering routine, the SiO2/VO2 coatings obtain high transmittance under the condition of slight loss in thermochromic properties. The double-layer coating sample exhibited good comprehensive performance, its near infrared switching rate at 2000 nm value is 39.6%, the solar energy modulation value is 8.4%, and the integral visible transmittance and the integral solar transmittance at 25℃ are 68.4% and 72.0%, respectively.
? 2019, Chinese Lasers Press. All right reserved.
Number of references:32
Main heading:Silicon oxides
Controlled terms:Coatings - Film preparation - Infrared devices - Microstructure - Optical properties - Silica - Sintering - Solar energy - Sols - Thin films - Vanadium dioxide
Uncontrolled terms:Comprehensive performance - Double layers - Smart windows - Solar transmittance - Thermochromic coatings - Thermochromic properties - Thermochromism - Visible transmittance
Classification code:657.1 Solar Energy and Phenomena - 741.1 Light/Optics - 804 Chemical Products Generally - 813.2 Coating Materials - 951 Materials Science
Numerical data indexing:Percentage 3.96e+01%, Percentage 6.84e+01%, Percentage 7.20e+01%, Percentage 8.40e+00%, Size 2.00e-06m
DOI:10.3788/AOS201939.0416001

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192006915874
Title:Compact, robust, and repetition-rate-locked all-polarization-maintaining femtosecond fiber laser system
Authors:Cai, Yajun (1, 2, 3); Pan, Ran (1); Zhang, Tong (4); Liu, Yuanshan (1); Wang, Hushan (1); Zhang, Wei (1); Wang, Yishan (1); Zhao, Wei (1, 3); Feng, Ye (1, 3); Hu, Xiaohong (1, 3)
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, China; (2) Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; (3) Shanxi University, Collaborative Innovation Center of Extreme Optics, Taiyuan, China; (4) Xi'An Technological University, School of Optoelectronic Engineering, Xi'an, China
Corresponding author:Feng, Ye(ye.feng.tut@gmail.com)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:58
Issue:4
Issue date:April 1, 2019
Publication year:2019
Article number:046108
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:We demonstrate a 200-MHz all polarization-maintaining, repetition-rate-locked femtosecond fiber laser system with a total electrical power consumption of 11 W. The center wavelength, spectral width, pulse width, and average output power of the laser are 1558.8 nm, 34 nm, 139 fs, and 77.6 mW, respectively. The proposed laser system that integrates all optical components and locking electronics has a volume less than 1.5 L, a mass of 1.3 kg, and a fast locking time of 3 s (from the free running state to the repetition-rate-locked state). Using a hydrogen maser as the frequency reference, after locking, the Allan deviation is 2.8 mHz at a gate time of 1 s. Further, we place the repetition-rate-locked fiber laser system on a homemade shaker table with peak and rms accelerations of 1.97 and 0.7 g, respectively; the experimental results show that the locking state can be maintained robustly with Allan deviation of 2.0 mHz. The highly integrated, robust fiber laser system has potential applications in the areas of ultralow-noise microwave generation and high-precision distance measurement in outdoor environments.
? 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:25
Main heading:Polarization-maintaining fiber
Controlled terms:Femtosecond lasers - Fiber lasers - Fibers - Hydrogen masers - Locks (fasteners) - Polarization - Pulse repetition rate
Uncontrolled terms:Average output power - Electrical power consumption - Femtosecond fiber lasers - Free-running state - Frequency reference - Outdoor environment - Polarization maintaining - Repetition rate
Classification code:714 Electronic Components and Tubes - 741.1.2 Fiber Optics - 744.1 Lasers, General - 744.4 Solid State Lasers
Numerical data indexing:Frequency 2.00e+08Hz, Frequency 2.00e-03Hz, Frequency 2.80e-03Hz, Mass 1.30e+00kg, Mass 1.97e-03kg, Mass 7.00e-04kg, Power 1.10e+01W, Power 7.76e-02W, Size 1.56e-06m, Size 3.40e-08m, Time 1.00e+00s, Time 1.39e-13s, Time 3.00e+00s, Volume 1.50e-03m3
DOI:10.1117/1.OE.58.4.046108
Funding details: Number: 61605239, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61805276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Key R and D Program of China (Grant No. 2016YFF0200700), the CAS Light of West China Program (Grant No. XAB2017B14), the National Natural Science Foundation of China (NSFC) (Grants Nos. 61805276, 61605239, and 61690222), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics (Grant No. SKLST201709), and the CAS/SAFEA international Partnership Program for Creative Research Teams

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432486
Title:Mirrors fabricated with CFRP composites by replication technology
Authors:Wu, XiaoGe (1); Wang, YongJie (1); Xu, Liang (1); Ma, Zhen (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China
Corresponding author:Wu, XiaoGe
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:1083709
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:To realize ultra-lightweight ratio, mirrors were fabricated with CFRP (carbon fiber reinforced plastic composites) by replication technology. The replication technology was aimed to improve surface accuracy. Though replication technique, the surface accuracy was improved to 0.098 λ (λ=632.8nm, RMS), and the roughness of 1.9 nm (Ra) can be achieved. The CFRP mirror presented poor dimension stability, the surface accuracy increased gradually in air. In order to solve this problem, a polymer coating was carried on mirror surface. The polymer coating exhibited better dimension stability, the surface accuracy can be maintained under 0.15 λ for more than 200 days.
? 2019 SPIE.
Number of references:6
Main heading:Plastic coatings
Controlled terms:Carbon fiber reinforced plastics - Dimensional stability - Fabrication - Fiber reinforced plastics - Mirrors - Optical testing - Telescopes
Uncontrolled terms:Carbon fiber-reinforced plastic composites - CFRP composites - Dimension stability - Mirror surfaces - Replication techniques - Replication technology - Surface accuracy - Ultra lightweights
Classification code:741.3 Optical Devices and Systems - 817.1 Polymer Products - 817.2 Polymer Applications
Numerical data indexing:Age 5.48e-01yr
DOI:10.1117/12.2504928
Funding details: Number: 51402351, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This work has been supported by the National Natural Science Foundation of China under Grant No. 51402351.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607089017
Title:Design of Optical System for Multi-band All-sky Airglow Imager
Title of translation:多波段全天空气辉成像仪光学系统设计
Authors:Li, Zhan-Tao (1, 2); Feng, Yu-Tao (1); Han, Bin (1, 2); Li, Yong (1); Sun, Jian (1); Bai, Qing-Lan (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, Yu-Tao(fytciom@126.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:5
Issue date:May 1, 2019
Publication year:2019
Article number:0522003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In order to reduce the complexity and development cost of the multi-band all-sky imager, a multi-band all-sky imaging optical system with no focusing and high robustness is proposed. A secondary imaging system is composed of a telecentric fisheye lens and a finite conjugate distance imaging lens of the telecentric image. The shelf-level narrow-band filter is placed at the image plane, using H-FK61 and KF2 glasses achieve full system apochromatic. The design results show that the system F number is 2.8, the band range is 427.8~865 nm, the chromatic focal shift is less than 0.048 mm, and the optical transfer functions of the eight observation channels of the system are all above 0.46, which meets the application requirements. The tolerance of filter is very loose. The surface tolerance PV is less than λ/2, the refractive index tolerance is ±0.003, the thickness tolerance is ±0.05, and the shelf-level products can meet the application requirements. Compared with the traditional scheme, the system eliminates the detector focusing mechanism and does not need to use a customized narrow-band filter, which simplifies the system and reduces the cost.
? 2019, Science Press. All right reserved.
Number of references:13
Main heading:Optical systems
Controlled terms:Cost reduction - Optical design - Optical transfer function - Refractive index
Uncontrolled terms:Airglow - All-sky airglow imager - All-sky imager - Apochromatic - Application requirements - Focusing mechanisms - Imaging optical systems - Thickness tolerance
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems
Numerical data indexing:Size 4.28e-07m to 8.65e-07m, Size 4.80e-05m
DOI:10.3788/gzxb20194805.0522003
Funding details: Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61705253, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (Nos. 61705253, 41005019), Young Scholar of Western China Academy of Sciences (No. XAB2016A07), Open Research Foundation of Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences (No. LSIT20101D).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192206992276
Title:Research on dynamic characteristics of space camera focusing platform
Title of translation:空间相机调焦平台的动力学特性研究
Authors:Cheng, Peng-Hui (1, 2); Wu, Meng-Yuan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinses Academy of Sciences, Beijing; 100049, China
Corresponding author:Cheng, Peng-Hui(AIACEOFAIR@126.com)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:27
Issue:3
Issue date:March 1, 2019
Publication year:2019
Pages:602-609
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:Focusing mechanism is a key part of space cameras. Its dynamic performance greatly affects camera reliability. To analysis the dynamic characteristics, the focusing mechanism platform of a space camera was researched in simulation, where its entry point was the guide, and the model of the guide joint was built with the optimized tandem spring damping element in the finite element model of the focusing mechanism platform. The research obtained dynamic parameters based on the Hertzian contact theory and equalizes the rigidity of the ball screw and the coupling on the guide, and formulates the relation expression and corrected parameter. The corrected parameter was confirmed by a comparative experiment based on the variable of the coupling stiffness, thereby completing the dynamic analysis of the space camera focusing platform. Finally, the research accomplishes the dynamic simulation analysis of the focusing platform with the stated analysis method under different conditions, with a deviation of under 2%, thus demonstrating high accuracy and reliability of the analysis method.
? 2019, Science Press. All right reserved.
Number of references:12
Main heading:Finite element method
Controlled terms:Ball screws - Cameras - Dynamic analysis - Dynamics - Focusing - Reliability analysis - Simulation platform
Uncontrolled terms:Comparative experiments - Corrected parameters - Dynamic characteristics - Dynamic simulation analysis - Focusing mechanisms - Hertzian-contact theory - Space cameras - Spring-damping element
Classification code:732.1 Control Equipment - 742.2 Photographic Equipment - 921.6 Numerical Methods
Numerical data indexing:Percentage 2.00e+00%
DOI:10.3788/OPE.20192703.0602

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192607099946
Title:Real-Time Evolution Dynamics of Double-Pulse Mode-Locking
Authors:Wang, Guomei (1, 2); Chen, Guangwei (1, 2); Li, Wenlei (1, 2); Zeng, Chao (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:Zeng, Chao(zengchao@opt.cn)
Source title:IEEE Journal of Selected Topics in Quantum Electronics
Abbreviated source title:IEEE J Sel Top Quantum Electron
Volume:25
Issue:4
Issue date:July-August 2019
Publication year:2019
Article number:8737713
Language:English
ISSN:07921233
E-ISSN:21910359
CODEN:IJSQEN
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:By means of the emerging dispersive Fourier transform technique, we captured the pulse-resolved spectral evolution dynamics of double-pulse mode-locking in a single-walled carbon nanotube based Er-doped fiber laser from the initial fluctuations, monitoring the evolution process up to 10 s (corresponding to ~260 million roundtrips) discontinuously. Two distinctly different evolutionary types of double-pulse mode-locking have been investigated in detail: splitting from one pulse and forming simultaneously. Relaxation oscillations, beating dynamics, transient bound state, spectral broadening, and variation of pulse interval have been observed in the evolution processes of the double-pulse mode-locking. Our study will be helpful for the further research of double-pulse mode-locking.
? 1995-2012 IEEE.
Number of references:32
Main heading:Mode-locked fiber lasers
Controlled terms:Cathode ray oscilloscopes - Cavity resonators - Discrete Fourier transforms - Dynamics - Fiber lasers - Fourier series - Interactive computer systems - Laser mode locking - Laser pulses - Locks (fasteners) - Real time systems - Single-walled carbon nanotubes (SWCN) - Transient analysis - Yarn
Uncontrolled terms:Bound state - Dispersive Fourier transforms - Double pulse - Er-doped fiber laser - Evolution process - Relaxation oscillation - Spectral broadening - Spectral evolution
Numerical data indexing:Time 1.00e+01s
DOI:10.1109/JSTQE.2019.2922828
Funding details: Number: 61223007, 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 Agreement 61223007 and Grant Agreement 61805277.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506748630
Title:Multi-spectral image level-by-level registration algorithm based on A-KAZE feature
Authors:Li, Hongyu (1, 2); Xue, Bin (1); Li, Yongfang (2); Tao, Jinyou (1); Zhou, Shaopan (1); Guan, Zhao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) Shaanxi Normal University, Xi'an; 710100, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11023
Part number:1 of 1
Issue title:Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Issue date:2019
Publication year:2019
Article number:110231N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627123
Document type:Conference article (CA)
Conference name:5th Symposium on Novel Optoelectronic Detection Technology and Application
Conference date:October 24, 2018 - October 26, 2018
Conference location:Xi'an, China
Conference code:145991
Sponsor:Chinese Society of Optical Engineering; Division of Information and Electronic Engineering of Chinese Academy of Engineering; Science and Technology on Low-Light-Level Night Vision Laboratory
Publisher:SPIE
Abstract:Aiming at the problem that he gray level of different spectral images varies greatly and the traditional feature extraction algorithm is difficult to maintain the local precision and edge detail of the image, a multi-channel multi-spectral image registration method based on A-KAZE algorithm. In the registration process, the Fast Explicit Diffusion (FED) numerical analysis framework is used to solve the nonlinear diffusion filter equation, and the nonlinear scale space is constructed. The feature points are obtained by calculating the Hessian matrix of each pixel; The invariant image feature vectors are constructed by the Modified-Local Difference Binary (M-LDB) descriptor. Then, the feature vectors are matched by KNN using Hamming distance, and the mismatched points are eliminated by M-estimator Sample Consensus (MSAC). Finally, the transformation matrix is calculated based on projection transformation model. For multi-channel multi-spectral images, the optimal registration route is calculated by level-by-level registration method, and the image registration is realized by registration strategy and transformation matrix. Multispectral phenological observation data were selected to verify the image registration effect of the algorithm, and compared with SIFT, SURF, KAZE algorithm. Experimental results show that this method can achieve sub-pixel registration accuracy on any two images, and has strong robustness and faster speed.
? 2019 SPIE.
Number of references:15
Main heading:Edge detection
Controlled terms:Hamming distance - Image registration - Linear transformations - Nonlinear equations - Pixels - Spectroscopy
Uncontrolled terms:A-KAZE - Feature extraction algorithms - Multi channel - Multispectral images - Nonlinear diffusion filters - Phenological observations - Projection transformation - Sub-pixel registrations
Classification code:723.2 Data Processing and Image Processing - 921.3 Mathematical Transformations
DOI:10.1117/12.2521791

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191306688302
Title:Preparation and thermal optimization of the proton-implanted high-gain Nd3+-doped laser glass waveguide
Authors:Chen, Jing-Yi (1); Wang, Yi (1); Wang, Zhi-Ming (1); Zhang, Liao-Lin (2); Guo, Hai-Tao (3); Liu, Chun-Xiao (1)
Author affiliation:(1) College of Electronic and Optical Engineering, Nanjing University of Post and Telecommunications, Nanjing; 210023, China; (2) School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou; 341000, China; (3) 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
Source title:Japanese Journal of Applied Physics
Abbreviated source title:Jpn. J. Appl. Phys.
Volume:58
Issue:3
Issue date:March 1, 2019
Publication year:2019
Article number:032002
Language:English
ISSN:00214922
E-ISSN:13474065
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:In this work, the high-gain Nd3+-doped laser glass was chosen as the target material, and the optical waveguide was formed on the glass by the H+ ion implantation under the conditions of a 8.0 ×1016-ions cm-2 fluence and a 0.4 MeV energy. The post-annealing at 200 °C for 1 h was applied to improve the optical quality of the waveguide. A metallographic microscope was used to detect changes in morphology caused by implanted ions in the high-gain Nd3+-doped laser glass. The characteristics of the ion-implanted high-gain Nd3+-doped laser glass optical waveguide, such as the dark-mode profiles and the near-field intensity distributions, were measured by experimental instruments including a prism coupler and an end-coupling system. The effects of nuclear energy loss of implanted ions on the refractive index variation of the substrate were analyzed by the reflectivity calculation method. The interaction mechanism of implanted protons with the high-gain Nd3+-doped laser glass was discussed by the SRIM 2013 code. It lays a theoretical and experimental basis for the development of high-gain Nd3+-doped glass waveguide lasers and amplifiers.
? 2019 The Japan Society of Applied Physics.
Number of references:27
Main heading:Ion implantation
Controlled terms:Annealing - Energy dissipation - Glass - Ions - Refractive index - Waveguides
Uncontrolled terms:Interaction mechanisms - Metallographic microscope - Near-field intensity - Optical qualities - Proton implanted - Refractive index variations - Target materials - Thermal optimization
Classification code:525.4 Energy Losses (industrial and residential) - 537.1 Heat Treatment Processes - 714.3 Waveguides - 741.1 Light/Optics - 812.3 Glass
Numerical data indexing:Electron_Volt 4.00e+05eV, Temperature 4.73e+02K, Time 3.60e+03s
DOI:10.7567/1347-4065/aafb49

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193207292509
Title:Grafted optical vortex with controllable orbital angular momentum distribution
Authors:Zhang, Hao (1); Li, Xinzhong (1, 2, 3); Ma, Haixiang (1); Tang, Miaomiao (1); Li, Hehe (1); Tang, Jie (2); Cai, Yangjian (4, 5)
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) Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University, Luoyang; 471934, China; (4) Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan; 250014, China; (5) School of Physical Science and Technology, Soochow University, Suzhou; 215006, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:16
Issue date:2019
Publication year:2019
Pages:22930-22938
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In an optical vortex (OV) field, the orbital angular momentum (OAM) distribution strongly depends on the intensity, which results in difficulty in OAM independent modulation. To overcome this limitation, we propose a grafted optical vortex (GOV) via spiral phase reconstruction of two or more OVs with different topological charges (TCs). To remain the annular shape of the GOV’s intensity, the Dirac δ-function is employed to restrict the energy in a ring. Theoretical analysis and manipulation experiments of polystyrene microspheres show that the magnitude and direction of the GOV’s local OAM are controllable by modulating the grafted TCs while the intensity remains constant. The results of this work provide an ingenious method to control the local tangential force on the light ring, which will promote potential applications in optical trapping and rotating micro-particles.
? 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Number of references:33
Main heading:Angular distribution
Controlled terms:Angular momentum - Delta functions - Grafting (chemical) - Polystyrenes - Vortex flow
Uncontrolled terms:Dirac delta function - Micro particles - Optical vortices - Opticaltrapping - Orbital angular momentum - Polystyrene micro-sphere - Tangential force - Topological charges
Classification code:631.1 Fluid Flow, General - 802.2 Chemical Reactions - 815.1.1 Organic Polymers - 921 Mathematics
DOI:10.1364/OE.27.022930
Funding details: Number: 11525418, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11704098, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61775052, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 91750201, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61775052, 11704098, 11525418, 91750201). The authors thank Dr. Jeffrey Melzer at the University of Arizona for constructive suggestions in particle manipulation.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193607400985
Title:Corner Detection-Based Segmentation Algorithm of Bioresorbable Vascular Scaffold Strut Contours
Title of translation:基于角点检测的可降解支架轮廓分割算法
Authors:Yao, Linlin (1, 2); Jin, Qinhua (3); Jing, Jing (3); Chen, Yundai (3); Cao, Yihui (1); Li, Jianan (1); Zhu, Rui (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; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Cardiology, Chinese PLA General Hospital, Beijing; 100853, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:39
Issue:7
Issue date:July 10, 2019
Publication year:2019
Article number:0715001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:According to the prior knowledge about obvious quadrilateral feature of bioresorbable vascular scaffold (BVS) struts in an intravascular optical coherence tomography (IVOCT) image, this study proposes a novel algorithm based on four corners of BVS struts to automatically obtain their contours in the IVOCT imaging system. It solves the problem that dynamic programming (DP) algorithm, which is a contour-based algorithm, is not sufficiently accurate because of the influence of the fractures inside the struts and blood artifacts around the struts. Experimental results show that the proposed algorithm achieves an average Dice's coefficient of 0.88 for the strut segmentation areas, which is increased by approximately 0.08 compared to the result obtained by the DP algorithm. This algorithm can accurately and robustly segment BVS struts in the IVOCT image, and thus it can better assist doctors in the automatic strut malapposition analysis in clinical applications.
? 2019, Chinese Lasers Press. All right reserved.
Number of references:23
Main heading:Image segmentation
Controlled terms:Computer vision - Dynamic programming - Edge detection - Image analysis - Optical tomography - Scaffolds - Struts - Tomography
Uncontrolled terms:Automatic segmentations - Corner detection - Intravascular - Malapposition analysis - Vascular scaffolds
Classification code:405.1 Construction Equipment - 408.2 Structural Members and Shapes - 741.2 Vision - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 921.5 Optimization Techniques
DOI:10.3788/AOS201939.0715001

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193007218300
Title:Nonzero-drift differential all-fiber-optic heterodyne Doppler measurement system
Authors:Zhang, Xiongxing (1, 2); Li, Yanping (1, 2); Wang, Wei (1, 2); Chen, Haibin (1, 2); Guo, Zilong (1, 2); Yang, Yuxiang (3)
Author affiliation:(1) Xi'an Technological University, School of Optoelectronics Engineering, Xi'an, China; (2) Xi'an Technological University, Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology, Xi'an, China; (3) Xi'an University of Technology, School of Mechanical and Precision Instrument Engineering, Xi'an, China
Corresponding author:Wang, Wei(wangwei@xatu.edu.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:58
Issue:5
Issue date:May 1, 2019
Publication year:2019
Article number:056108
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:To eliminate the serious detrimental effects caused by frequency drifts of acousto-optic frequency shifters (AOFSs) in conventional all-fiber-optic heterodyne Doppler measurement systems, a differential all-fiber-optic heterodyne configuration is proposed. By delicate arrangement of the fiber-optic path and using only one AOFS, zero drift, which commonly occurs in conventional systems, is eliminated. Based on the proposed configuration, a differential all-fiber-optic heterodyne Doppler measurement system has been built. Using a piezoelectric ceramic oscillator as the moving object, it has been verified that the proposed system is able to eliminate zero drift, and the displacement and velocity measurement accuracies reach 0.775 μm and 0.009 mm / s, respectively. It has been shown that the differential all-fiber-optic heterodyne Doppler measurement system can achieve good performance in both displacement and velocity measurements, even in a harsh environment with drastic temperature variation.
? The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License.
Number of references:23
Main heading:Optical heterodyning
Controlled terms:Displacement measurement - Doppler effect - Fiber optics - Fibers - Heterodyne detection - Piezoelectric ceramics - Velocity measurement
Uncontrolled terms:Acoustooptic frequency shifter - Conventional systems - Doppler measurement - Frequency drifts - Harsh environment - Measurement accuracy - Temperature variation - Zero drift
Classification code:708.1 Dielectric Materials - 741.1.2 Fiber Optics - 943.2 Mechanical Variables Measurements - 943.3 Special Purpose Instruments
Numerical data indexing:Size 7.75e-07m, Velocity 9.00e-06m/s
DOI:10.1117/1.OE.58.5.056108
Funding details: Number: 61501363, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the Open Foundation of the Key Laboratory of Photoelectric Testing and Instrument Technology of Shaanxi Province, Grant No. 2015SZSJ603; Xi'an Key Laboratory of Intelligent Detection and Perception, Grant No. 201805061ZD12CG45; Program for Fostering Talents of Xi'an Association for Science and Technology, Grant No. 6; and the National Natural Science Foundation of China, Grant No. 61501363. In addition, we would like to thank Editage (www.editage.com) for English language editing. The authors declare that there are no conflicts of interest regarding the publication of this paper.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506452980
Title:Graphene based polarization independent Fano resonance at terahertz for tunable sensing at nanoscale
Authors:Wang, Kai (1, 2); Fan, Wen-Hui (1); Chen, Xu (1); Song, Chao (1, 2); Jiang, Xiao-Qiang (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:Fan, Wen-Hui(fanwh@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:439
Issue date:15 May 2019
Publication year:2019
Pages:61-65
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:A two-dimensional metamaterial structure consisting of polyimide layer covered by a square disk of monolayer graphene and the gold symmetrical split resonance ring is proposed and investigated. Our simulations indicate that the Fano resonance mode in the terahertz range can be generated by this metamaterial structure, and also utilized for nanoscale sensing. The maximum frequency shift is 1671.61 GHz, and the frequency sensitivity is 1.18 THz/RIU for 2-nm-thick analyte. Furthermore, by adjusting the Fermi level of graphene, the resonance frequency can be tuned actively. Different from the Fano resonance excited by asymmetric structure, the proposed structure is polarization-insensitive and can perform well with both TE and TM waves
? 2019 Elsevier B.V.
Number of references:34
Main heading:Resonance
Controlled terms:Graphene - Metamaterials - Nanotechnology - Polarization
Uncontrolled terms:Fano resonances - Frequency sensitivity - Metamaterial structures - Nano scale - Polarization independent - Polarization-insensitive - Resonance frequencies - Tunable sensing
Classification code:761 Nanotechnology - 931.1 Mechanics - 951 Materials Science
Numerical data indexing:Frequency 1.67e+12Hz
DOI:10.1016/j.optcom.2019.01.044
Funding details: Number: -, Acronym: -, Sponsor: CAS-SAFEA International Partnership Program for Creative Research Teams;Number: 61675230, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: BX20180353, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: J08-029, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: YYYJ-1123-4, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the National Natural Science Foundation of China (No. 61675230); the China Postdoctoral Science Foundation (No. BX20180353); the "Hundreds of Talents Programs" of the Chinese Academy of Sciences (No. J08-029); the Innovative Project of the Chinese Academy of Sciences (No. YYYJ-1123-4), and the CAS/SAFEA International Partnership Program for Creative Research Teams, China.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191006603244
Title:Design of deviation detector for image stabilization system on space solar observation equipment
Authors:He, Jiawei (1, 2); Yang, Jianfeng (1); Zhang, Haiying (3)
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; 101408, China; (3) Nanjing Institute of Astronomical Optics and Technology, National Astronomical Observatories, CAS, Nanjing; 210042, China
Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10843
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Issue date:2019
Publication year:2019
Article number:108431A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623286
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optoelectronic Materials and Devices for Sensing and Imaging
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:145452
Sponsor:Institute of Optics and Electronics (IOE), Chinese Academy of Sciences; The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:The space solar observation equipment takes the spacecraft as the platform, and the vibration of spacecraft will have influence over the observation. Therefore, we need to develop the image stabilization system to ensure the imaging resolution. In this paper, a method for detecting the centroid deviation of solar facula is proposed. A photodiode-based deviation detector was designed based on the requirements of the image stabilization system for the Full-disc vector Magneto Graph. Compared with the traditional method of deviation detecting, it has faster response rate, lower power consumption. Backup design is added to improve the reliability of the work on orbit. According to the test results, a resolution of 5 μm is achieved within the working range. It can cooperate with the steering mirror mechanism to form the image stabilization system and serve the Full-disc vector Magneto Graph.
? 2019 SPIE ·
Number of references:11
Main heading:Spacecraft equipment
Controlled terms:Image processing - Manufacture - Optoelectronic devices - Orbits - Stabilization - Vector spaces
Uncontrolled terms:Full-disc vector Magneto Graph - Image stabilization systems - Imaging resolutions - Lower-power consumption - On orbit - Response rate - Solar observations - Steering mirrors
Classification code:537.1 Heat Treatment Processes - 655.1 Spacecraft, General - 741.3 Optical Devices and Systems - 921 Mathematics
Numerical data indexing:Size 5.00e-06m
DOI:10.1117/12.2506541

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806543466
Title:Robust and flexible method for calibrating the focal length of on-orbit space zoom camera
Authors:Zhang, Gaopeng (1, 2); Zhao, Hong (1); Yang, Hongtao (2); Hong, Yang (3); Ma, Yueyang (1); Gu, Feifei (4)
Author affiliation:(1) State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi; 710049, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi; 710119, China; (3) Troops 95703 PLA, Qujing, Yunnan; 655601, China; (4) Shenzhen Key Laboratory of Virtual Reality and Human Interaction Technology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong; 518055, China
Corresponding author:Zhao, Hong(zhaohong@mail.xjtu.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:58
Issue:6
Issue date:February 20, 2019
Publication year:2019
Pages:1467-1474
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:For the on-orbit space zoom camera, the camera focal length is in a constant process of change; accordingly, compared with calibrating other camera intrinsic parameters, calibrating the focal length has a practical significance for the space zoom camera. With the vanishing points obtained from the solar panel of human-made space satellites, this paper introduces a focal length self-calibration method for the on-orbit space zoom camera. First, the geometrical relationship and infinite homography of vanishing points at various camera positions are used to derive the method. To improve the accuracy and robustness performance of this approach, an optimization method is then proposed to nonlinearly optimize the camera focal length. Finally, simulation and real physical experiments demonstrate that the proposed method is flexible and accurate with good anti-noise interference and real-time capacity. The method proposed in this paper makes more realistic sense for a number of important space tasks.
? 2019 Optical Society of America.
Number of references:17
Main heading:Cameras
Controlled terms:Orbits
Uncontrolled terms:Anti-noise interference - Camera focal length - Camera intrinsic parameters - Geometrical relationship - Infinite homography - Optimization method - Physical experiments - Self-calibration method
Classification code:742.2 Photographic Equipment
DOI:10.1364/AO.58.001467
Funding details: Number: 61575157, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61575157); Fundamental Research Funds for the Central Universities (XJJ2018190). The authors declare that there are no conflicts of interest related to this paper.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407357463
Title:Review of resolution enhancement technologies in quantitative phase microscopy
Title of translation:定量相位显微中分辨率增强技术综述
Authors:Gao, Peng (1); Wen, Kai (1, 2, 3); Sun, Xueying (1); Yao, Baoli (2); Zheng, Juanjuan (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710171, 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) College of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Wen, Kai(thinker_wk@163.com)
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:48
Issue:6
Issue date:June 25, 2019
Publication year:2019
Article number:0603007
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Quantitative Phase Microscopy (QPM), which combines phase imaging and optical microscopy, has been acting as a fast, non-destructive, and high-resolution methodology to measure the 3D morphology of reflective samples, as well as the inner structure or the refractive index of transparent samples. Similar to other diffraction-limited imaging systems, QPM suffers from the contradiction between spatial resolution and field of view (FOV). Therefore, how to achieve high spatial resolution in a large FOV has attracted a lot of attentions in the field of optical microscopy. In recent years, people utilized off-axis illumination, speckle illumination, structural illumination, and sub-pixel technology to synthesize a larger numerical aperture (SNA), and consequently enhanced the resolution of QPM. The resolution enhancement technologies of QPM were reviewed in this paper. The advantages and limitations of different methods were analyzed.
? 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:52
Main heading:Image resolution
Controlled terms:Optical data storage - Optical microscopy - Pixels - Refractive index - Synthetic apertures
Uncontrolled terms:Diffraction limited - High spatial resolution - Off axis illumination - Phase imaging - Quantitative phase microscopies - Resolution enhancement - Resolution enhancement technology - Sub pixels
Classification code:716.2 Radar Systems and Equipment - 722.1 Data Storage, Equipment and Techniques - 741.1 Light/Optics
DOI:10.3788/IRLA201948.0603007

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20182705408852
Title:Semisupervised Learning with Parameter-Free Similarity of Label and Side Information
Authors:Zhang, Rui (1); Nie, Feiping (1); Li, Xuelong (2)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China; (2) State Key Laboratory of Transient Optics and Photonics, Center for OPTical IMagery Analysis and Learning, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
Corresponding author:Li, Xuelong(xuelong_li@opt.ac.cn)
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:30
Issue:2
Issue date:February 2019
Publication year:2019
Pages:405-414
Article number:8399869
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:As for semisupervised learning, both label information and side information serve as pivotal indicators for the classification. Nonetheless, most of related research works utilize either label information or side information instead of exploiting both of them simultaneously. To address the referred defect, we propose a graph-based semisupervised learning (GSL) problem according to both given label information and side information. To solve the GSL problem efficiently, two novel self-weighted strategies are proposed based on solving associated equivalent counterparts of a GSL problem, which can be widely applied to a spectrum of biobjective optimizations. Different from a conventional technique to amalgamate must-link and cannot-link into a single similarity for convenient optimization, we derive a new parameter-free similarity, upon which intrinsic graph and penalty graph can be separately developed. Consequently, a novel semisupervised classification algorithm can be summarized correspondingly with a theoretical analysis.
? 2012 IEEE.
Number of references:34
Main heading:Classification (of information)
Controlled terms:Graphic methods - Laplace equation - Optics - Optimization - Problem solving - Supervised learning
Uncontrolled terms:Optical imaging - quadratic trace ratio (QTR) problem - Semi- supervised learning - Side information - Soft labels - Symmetric matrices
DOI:10.1109/TNNLS.2018.2843798
Funding details: Number: 2018YFB1107400, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61772427, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:Manuscript received May 24, 2017; revised November 21, 2017, January 30, 2018, April 17, 2018, and May 14, 2018; accepted May 31, 2018. Date of publication June 28, 2018; date of current version January 21, 2019. This work was supported by the National Natural Science Foundation of China under Grant 61772427, Grant 61751202, and Grant 61761130079, and in part by the National Key Research and Development Program of China under Grant 2018YFB1107400. (Corresponding author: Feiping Nie.) R. Zhang and F. Nie are with the Center for OPTical IMagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi’an 710072, China (e-mail: ruizhang8633@gmail.com; feipingnie@gmail.com).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193507376980
Title:Gaussian-like and flat-top solitons of atoms with spatially modulated repulsive interactions
Authors:Zeng, Liangwei (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, 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:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:36
Issue:8
Issue date:2019
Publication year:2019
Pages:2278-2284
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Solitons, nonlinear particle-like excitations with inalterable properties (amplitude, shape, and velocity) as they propagate, are omnipresent in many branches of science—and in physics in particular. Flat-top solitons are a novel type of bright solitons that have not been well explored in pure nonlinear media. Here, a model of nonlinear Kerr (cubic) media of ultracold atoms with spatially modulated repulsive interactions is proposed and shown to support a vast variety of stable flat-top matter-wave solitons, including one-dimensional flat-top fundamental and multipole solitons, and two-dimensional flat-top fundamental and vortex solitons. We demonstrate that by varying the relevant physical parameters (nonlinearity coefficient and chemical potential), the ordinary bright (Gaussian) solitons can transform into the novel flat-top solitons. The (in)stability domains of the flat-top soliton families are checked by means of linear stability analysis and reconfirmed by direct numerical simulations. This model is generic in the contexts of nonlinear optics and Bose–Einstein condensates, which provides direct experimental access to observe the predicted solutions.
? 2019 Optical Society of America.
Number of references:61
Main heading:Solitons
Controlled terms:Linear stability analysis - Nonlinear optics
Uncontrolled terms:Einstein condensate - Matter wave solitons - Non-linear media - Nonlinearity coefficient - Physical parameters - Repulsive interactions - Spatially modulated - Stability domains
Classification code:741.1.1 Nonlinear Optics - 921 Mathematics
DOI:10.1364/JOSAB.36.002278
Funding details: Number: 2016357, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61690224, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (NSFC) (61690222, 61690224); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2016357).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192407032636
Title:Adaptive visual multi-object tracker based on multi-bernoulli filter and region feature covariance
Authors:Zhang, Guangnan (1, 2); Yang, Jinlong (3); Wang, Weixing (1); Qiu, S.H.I. (4); Tang, Y.U. (3)
Author affiliation:(1) College of Information Engineering, Chang’an University Middle-section of Nan’er Huan Road, Xi’an; 710064, China; (2) School of Computer Science and Technology, Baoji University of Arts and Science, No. 44, Baoguang Road, Baoji; 721007, China; (3) School of Internet of Things Engineering, Jiangnan University, No. 1800, Lihu Avenue, Wuxi; 214122, China; (4) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17, Xinxi Road, New Industrial Park, Xi’an; 710119, China
Corresponding author:Wang, Weixing(wxwang@chd.edu.cn)
Source title:International Journal of Innovative Computing, Information and Control
Abbreviated source title:Int. J. Innov. Comput. Inf. Control
Volume:15
Issue:3
Issue date:June 2019
Publication year:2019
Pages:1131-1143
Language:English
ISSN:13494198
Document type:Journal article (JA)
Publisher:ICIC International
Abstract:Multi-Bernoulli (MB) filter has been demonstrated as a promising algorithm for tracking multiple point targets with unknown and time-varying number of targets. However, for the visual multi-object tracking (VMOT), the tracking accuracy will decrease severely due to the problems of closely-spaced object, occlusion and scale variation. To solve these problems, an adaptive VMOT algorithm based on the framework of the MB filter is proposed in this paper. First, the region feature covariance (RFC) is employed to enhance the ability of anti-interference, and then the discrimination strategy for the closely-spaced objects and the adaptive estimate strategy for scale variation are developed according to the constraints of tracking boxes. Finally, the particle labeling technique is introduced to identify the track of each target. Experimental results validate superior performance of the proposed algorithm over the traditional MB-based VMOT algorithm in scenarios that include occlusion, background clutter, scale changes, and closely-spaced objects.
? 2019, ICIC International. All rights reserved.
Number of references:44
Main heading:Tracking (position)
Controlled terms:Computational methods - Computer applications
Uncontrolled terms:Anti-interference - Background clutter - Closely spaced objects - Labeling techniques - Multi-Bernoulli - Multi-object tracking - Multiple point targets - Region feature
Classification code:723.5 Computer Applications
DOI:10.24507/ijicic.15.03.1131
Funding details: Number: 61305017, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61772237, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: BK20130154, Acronym: -, Sponsor: Natural Science Foundation of Jiangsu Province;Number: BK20181340, Acronym: -, Sponsor: Natural Science Foundation of Jiangsu Province;
Funding text:This work is partially supported by the Natural Science Foundation of Jiangsu Province (Nos. BK20181340, BK20130154), the National Natural Science Foundation of China (Nos. 61305017, 61772237). The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107255131
Title:Spectral Data Reconstruction Algorithm of Hadamard Transform Spectral Imager
Title of translation:哈达码变换光谱成像仪数据复原算法
Authors:Li, Yun (1, 2); Hu, Bing-Liang (1); Gao, Xiao-Hui (1); Sun, Xin (1); Wu, Deng-Shan (1); Yan, Peng (1); Zhang, Xiao-Rong (1)
Author affiliation:(1) Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:48
Issue:6
Issue date:June 1, 2019
Publication year:2019
Article number:0630002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:Based on the principle of hadamard transform spectral imager, through the mathematical modeling of its spectral imaging process, the spectral information aliasing and spatial information aliasing caused by hadamard code mask modulation are deeply analyzed, and an algorithm is proposed to remove aliasing according to the spectral offset. The target data is collected by the self-developed hadamard transform spectral imager. Data cube reconstruction is accomplished by the proposed algorithm of removing aliasing. Finally, the 3D data cube is restored successfully. The spatial information aliasing and spectral information aliasing are effectively removed, and the correctness of the proposed algorithm is verified.
? 2019, Science Press. All right reserved.
Number of references:14
Main heading:Hadamard transforms
Controlled terms:Anti-aliasing - Image reconstruction - Spectroscopy
Uncontrolled terms:Data reconstruction - Encoding masks - Hadamard codes - Spatial informations - Spectral aliasing - Spectral data - Spectral imaging - Spectral information
Classification code:921.1 Algebra
DOI:10.3788/gzxb20194806.0630002
Funding details: Number: 11327303, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61405239, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The National Natural Science Foundation of China(Nos.61405239, 11327303).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193407331259
Title:Gain characteristics of a high nonlinearity graphene silicon-based hybrid waveguide????(Open Access)
Authors:Chen, Hongji (1, 3); Liu, Hongjun (1, 2); Wang, Zhaolu (1); Huang, Nan (1); Huo, Yiping (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) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (3) Shaanxi Normal University, Shaanxi; 710119, China
Source title:Japanese Journal of Applied Physics
Abbreviated source title:Jpn. J. Appl. Phys.
Volume:58
Issue:7
Issue date:2019
Publication year:2019
Article number:070908
Language:English
ISSN:00214922
E-ISSN:13474065
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We demonstrate a phase-sensitive amplifier based on a high nonlinearity graphene silicon-based hybrid waveguide. Dispersion characteristics of the phase-sensitive amplifier are adjustable via chemical potential of the graphene, and the zero dispersion point right shifts with the chemical potential increasing. Single-trench waveguide structure makes the TE mode strictly limited to the trench. The effective mode area is 0.25 μm2. An organic material with low two-photon absorption and high Kerr index is filled in the trench to provide a large nonlinear parameter of 3500 W-1 m-1. The proposed amplifier has a gain of 35 dB with a length of 1.25 mm.
? 2019 The Japan Society of Applied Physics.
Number of references:28
Main heading:Waveguides
Controlled terms:Chemical potential - Graphene - Silicon - Two photon processes
Uncontrolled terms:Dispersion characteristics - Effective mode areas - Gain characteristic - High nonlinearity - Non-linear parameters - Phase sensitive amplifiers - Two photon absorption - Waveguide structure
Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.3 Waveguides - 761 Nanotechnology - 801.4 Physical Chemistry - 804 Chemical Products Generally
Numerical data indexing:Area 2.50e-13m2, Decibel 3.50e+01dB, Size 1.25e-03m
DOI:10.7567/1347-4065/ab2a7c
Funding details: Number: QNLM2016ORP0111, Acronym: -, Sponsor: -;Number: https://doi.org/10.13039/501100001809 11604377 61505247 61775234, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Hongji Chen Hongjun Liu Zhaolu Wang Nan Huang Yiping Huo Hongji Chen Hongjun Liu Zhaolu Wang Nan Huang Yiping Huo State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of China Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, People’s Republic of China Shaanxi Normal University, Shaanxi 710119, People’s Republic of China Hongji Chen, Hongjun Liu, Zhaolu Wang, Nan Huang and Yiping Huo 2019-07-01 2019-07-04 10:03:00 cgi/release: Article released bin/incoming: New from .zip Natural Science Basic Research plan in Shaanxi Province of China 2018JQ6067 CAS "Light of West China" Program XAB2015B27 XAB2017B18 Qingdao National Laboratory for Marine Science and Technology QNLM2016ORP0111 National Natural Science Foundation of China https://doi.org/10.13039/501100001809 11604377 61505247 61775234 yes We demonstrate a phase-sensitive amplifier based on a high nonlinearity graphene silicon-based hybrid waveguide. Dispersion characteristics of the phase-sensitive amplifier are adjustable via chemical potential of the graphene, and the zero dispersion point right shifts with the chemical potential increasing. Single-trench waveguide structure makes the TE mode strictly limited to the trench. The effective mode area is 0.25? μ m 2 . An organic material with low two-photon absorption and high Kerr index is filled in the trench to provide a large nonlinear parameter of 3500?W ?1 ?m ?1 . The proposed amplifier has a gain of 35?dB with a length of 1.25?mm. ? 2019 The Japan Society of Applied Physics [1] Ooi K. J. A., Ng D. K. T., Wang T., Chee A. K. L., Ng S. K., Wang Q., Ang L. K., Agarwal A. M., Kimerling L. C. and Tan D. T. H. 2017 Nat. Commun. 8 13878 10.1038/ncomms13878 Ooi K. J. A., Ng D. K. T., Wang T., Chee A. K. L., Ng S. K., Wang Q., Ang L. K., Agarwal A. M., Kimerling L. C. and Tan D. T. H. Nat. Commun. 8 2017 13878 [2] Fan J. and Migdall A. 2006 Opt. Lett. 31 2771 10.1364/OL.31.002771 Fan J. and Migdall A. Opt. Lett. 31 2006 2771 [3] Duffin T. J., Nielsen M. P., Diaz F., Palomba S., Maier S. A. and Oulton R. F. 2016 Opt. Lett. 41 155 10.1364/OL.41.000155 Duffin T. J., Nielsen M. P., Diaz F., Palomba S., Maier S. A. and Oulton R. F. Opt. Lett. 41 2016 155 [4] Yang W., Yu Y., Ye M., Chen G., Zhang C. and Zhang X. 2015 Opt. Express 23 2010 10.1364/OE.23.002010 Yang W., Yu Y., Ye M., Chen G., Zhang C. and Zhang X. Opt. Express 1094-4087 23 2015 2010 [5] Slavík R. et al 2010 Nat. Photonics 4 690 10.1038/nphoton.2010.203 Slavík R. et al Nat. Photonics 4 2010 690 [6] Tong Z., Lundstrom C., Andrekson P. A., Karlsson M. and Bogris A. 2012 Quantum Electron. 18 1016 10.1109/JSTQE.2011.2136330 Tong Z., Lundstrom C., Andrekson P. A., Karlsson M. and Bogris A. Quantum Electron. 18 2012 1016 [7] Ma Y., Liu H., Sun Q., Huang N. and Wang Z. 2016 Appl. Opt. 55 3140 10.1364/AO.55.003140 Ma Y., Liu H., Sun Q., Huang N. and Wang Z. Appl. Opt. 0003-6935 55 2016 3140 [8] Leuthold J., Koos C. and Freude W. 2010 Nat. Photonics 4 535 10.1038/nphoton.2010.185 Leuthold J., Koos C. and Freude W. Nat. Photonics 4 2010 535 [9] Koos C. et al 2009 Nat. Photonics 3 216 10.1038/nphoton.2009.25 Koos C. et al Nat. Photonics 3 2009 216 [10] Marques M. B., Assanto G., Stegeman G. I., M?hlmann G. R., Erdhuisen E. W. P. and Horsthuis W. H. G. 1991 Appl. Phys. Lett. 58 2613 10.1063/1.104810 Marques M. B., Assanto G., Stegeman G. I., M?hlmann G. R., Erdhuisen E. W. P. and Horsthuis W. H. G. Appl. Phys. Lett. 58 1991 2613 [11] Kovacevic G. and Yamashita S. 2016 Opt. Express 24 3584 10.1364/OE.24.003584 Kovacevic G. and Yamashita S. Opt. Express 1094-4087 24 2016 3584 [12] Kovacevic G., Phare C., Set S. Y., Lipson M. and Yamashita S. 2018 Appl. Phys. Express 11 065102 10.7567/APEX.11.065102 Kovacevic G., Phare C.

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107254851
Title:Elliptical-Fitting Cavity Length Demodulation Algorithm for Compound Fiber-Optic Fabry-Perot Pressure Sensor with Short Cavity
Title of translation:短腔长复合式光纤法布里-珀罗压力传感器椭圆拟合腔长解调算法
Authors:Wang, Wei (1, 2); Tang, Ying (1); Zhang, Xiongxing (1, 2); Chen, Haibin (1, 2); Guo, Zilong (1); Wang, Kening (1)
Author affiliation:(1) School of Optoelectronics Engineering, Xi'an Technological University, Xi'an; Shaanxi; 710021, China; (2) Shaanxi Key Laboratory of Integrated and Intelligent Navigation, Xi'an; Shaanxi; 710068, China
Corresponding author:Wang, Wei(wangwei@xatu.edu.cn)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:39
Issue:6
Issue date:June 10, 2019
Publication year:2019
Article number:0606001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A reflection spectrum model of a compound fiber-optic Fabry-Perot (FP) pressure sensor with short length is established, a two-parameter ellipse-fitting cavity length demodulation algorithm is proposed, and the demodulation for FP-cavity lengths in the range of 26-30 μm is simulated. The results show that the maximum error for the demodulated two-parameter ellipse-fitting cavity length is only 0.05 μm. A demodulation system for the fiber-optic FP sensor is established, and the experiments under different pressures are conducted. A 20-kHz demodulation rate is achieved. Thus, the feasibility and real-time performance of the proposed algorithm for demodulating a compound fiber-optic FP pressure sensor with a short cavity are verified.
? 2019, Chinese Lasers Press. All right reserved.
Number of references:23
Main heading:Fiber optic sensors
Controlled terms:Demodulation - Fabry-Perot interferometers - Fiber optics - Fibers - Geometry - Optical variables measurement - Parameter estimation - Pressure sensors
Uncontrolled terms:Compound cavity - Demodulation algorithms - Different pressures - Ellipse fitting - Ellipse fitting algorithms - Fabry-Perot pressure sensor - Real time performance - Reflection spectra
Classification code:741.1.2 Fiber Optics - 921 Mathematics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements - 944.3 Pressure Measuring Instruments
Numerical data indexing:Frequency 2.00e+04Hz, Size 2.60e-05m to 3.00e-05m, Size 5.00e-08m
DOI:10.3788/AOS201939.0606001

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192707140283
Title:Streaking of argon L-shell auger emissions with > 250 eV attosecond X-ray pulses
Authors:Han, Seunghwoi (1); Xu, Peng (2); Wang, Yishan (2); Zhao, Kun (3); Chang, Zenghu (1)
Author affiliation:(1) CREOL, Department of Physics, University of Central Florida, Orlando; FL; 32816, United States; (2) State Key Lab. of Transient Optics and Photonics, Xi'an Institute of Optic s and Precision Mechanics, CAS, Xi'an; 710119, China; (3) Institute of Physics, Chinese Academy of Sciences, Beijing; 100190, China
Corresponding author:Chang, Zenghu(Zenghu.Chang@ucf.edu)
Source title:Optics InfoBase Conference Papers
Abbreviated source title:Opt. InfoBase Conf. Pap
Volume:Part F128-CLEO_QELS 2019
Part number:1 of 1
Issue title:CLEO: QELS_Fundamental Science, CLEO_QELS 2019
Issue date:2019
Publication year:2019
Report number:FF3C.4
Language:English
ISBN-13:9781943580576
Document type:Conference article (CA)
Conference name:CLEO: QELS_Fundamental Science, CLEO_QELS 2019
Conference date:May 5, 2019 - May 10, 2019
Conference location:San Jose, CA, United states
Conference code:141088
Publisher:OSA - The Optical Society
Abstract:We investigate the Argon Auger decay using isolated attosecond X-ray pulses reach the Carbon K-edge. A home-built electron spectrometer resolves and measures lifetimes of L-shell vacancies of Argon in pump-probe experiment.
? 2019 The Author(s).
Number of references:6
Main heading:X rays
Controlled terms:Argon - Augers
Uncontrolled terms:Attosecond x-ray pulse - Auger decays - Auger emission - Carbon K-edge - Electron spectrometer - Home-built - L shell - Pump-probe experiments
Classification code:502.2 Mine and Quarry Equipment - 804 Chemical Products Generally - 932.1 High Energy Physics
Numerical data indexing:Electron_Volt 2.50e+02eV
DOI:10.1364/CLEO-QELS.2019.FF3C.4

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107246130
Title:Multi-source Integrated Navigation Algorithm for Iterated Maximum Posteriori Estimation Based on Sliding-window Factor Graph
Title of translation:基于滑动窗迭代最大后验估计的多源组合导航因子图融合算法
Authors:Xu, Haowei (1); Lian, Baowang (1); Liu, Shangbo (1, 2)
Author affiliation:(1) School of Electronics and Information, Northwestern Polytechnical University, Xi'an; Shaanxi; 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China
Corresponding author:Lian, Baowang(bwlian@nwpu.edu.cn)
Source title:Binggong Xuebao/Acta Armamentarii
Abbreviated source title:Binggong Xuebao
Volume:40
Issue:4
Issue date:April 1, 2019
Publication year:2019
Pages:807-819
Language:Chinese
ISSN:10001093
CODEN:BIXUD9
Document type:Journal article (JA)
Publisher:China Ordnance Society
Abstract:In the process of data fusion in multi-source integrated navigation using factor graph, the time-varying characteristics of the subsystem's observed noise have a great influence on the estimation accuracy of navigation state. In order to solve the problem, a Gaussian model-based method to estimate the mean vector and covariance matrix of sub-system observation is proposed. In the proposed method, the observed-measurement residuals for each iterative cycle in the process of factor graph optimization are utilized to update the maximum posteriori estimated values of mean vectors and covariance matrices. A more accurate estimated value of navigation state can be obtained by estimating the sub-system noise state. The influence of the new algorithm on the convergence of optimization process was also deduced. Both the simulated and experimental results show that, compared with the existing algorithms as factor graph, maximum likelihood estimation based factor graph and maximum posteriori based factor graph, the proposed factor graph method based on iterative maximum posteriori estimation can effectively improve the accuracy of navigation estimation when the subsystem observing state varies.
? 2019, Editorial Board of Acta Armamentarii. All right reserved.
Number of references:22
Main heading:Maximum likelihood estimation
Controlled terms:Air navigation - Covariance matrix - Data fusion - Inertial navigation systems - Iterative methods - Ultra-wideband (UWB)
Uncontrolled terms:Covariance matrices - Factor graphs - Global Navigation Satellite Systems - Integrated navigation - Iterative cycles - Measurement residual - Posteriori estimation - Time-varying characteristics
Classification code:431.5 Air Navigation and Traffic Control - 716.3 Radio Systems and Equipment - 723.2 Data Processing and Image Processing - 921 Mathematics - 921.6 Numerical Methods - 922 Statistical Methods
DOI:10.3969/j.issn.1000-1093.2019.04.016

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20193107246206
Title:Forward Simulation of Limb-Viewing Michelson Wind Imaging Interferometer Based on O3 Radiation Source
Title of translation:O3辐射源Michelson测风成像干涉仪临边观测正演仿真
Authors:He, Weiwei (1); Wu, Kuijun (2); Feng, Yutao (3); Wang, Houmao (4); Fu, Di (3); Liu, Qiuxin (1); Yan, Xiaohu (1)
Author affiliation:(1) City College, Wuhan University of Science and Technology, Wuhan; Hubei; 430083, China; (2) Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (4) National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:39
Issue:5
Issue date:May 10, 2019
Publication year:2019
Article number:0512005
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:An important method to observe stratospheric winds is to invert the Doppler frequency shift of fine spectra with a Michelson interferometer using an O3 radiation probe source in the 8.823-μm waveband. Therefore, the spectral characteristics of O3 limb radiation were analyzed to determine the best target spectral line. The target spectral line was extracted via the combined filtering of a three-level infrared Fabry-Perot etalon. The four-step interferometric images were obtained during daytime and nighttime limb-viewing with the established numerical model of the Michelson interferometer. Via an error analysis, the result was validated to ensure that, in the range of 15-45 km, the measurement errors of the wind in the line of sight are within a range of 1-2 m/s for both daytime and nighttime observations. Consequently, the stratospheric winds can be detected globally and round the clock using a Michelson interferometer with O3 radiation as the probe source.
? 2019, Chinese Lasers Press. All right reserved.
Number of references:17
Main heading:Michelson interferometers
Controlled terms:Error analysis - Fabry-Perot interferometers - Measurement - Probes - Remote sensing - Spacecraft instruments - Spectroscopy
Uncontrolled terms:Atmospheric Winds - Doppler frequency shift - Interferometric images - Satellite remote sensing - Spectral characteristics - Spectral imaging - Stratospheric winds - Wind imaging interferometer
Classification code:655.1 Spacecraft, General - 941.3 Optical Instruments
Numerical data indexing:Size 1.50e+04m to 4.50e+04m, Size 8.82e-06m, Velocity 1.00e+00m/s to 2.00e+00m/s
DOI:10.3788/AOS201939.0512005

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190506432475
Title:Design of off-axis three-mirror freeform optical system with wide field of view
Authors:Ni, Dongwei (1, 2); Li, Xuyang (1); Ren, Zhiguang (3); Wang, Yuming (1, 2); Wang, Lei (1, 2); Tian, Chunlin (1, 2)
Author affiliation:(1) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Shaanxi Normal University, Xi'an; 710119, China
Corresponding author:Li, Xuyang
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:10837
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Issue date:2019
Publication year:2019
Article number:108370Z
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623163
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144224
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:In order to obtain a wider imaging field of view, freeform surface is used to design a large field of view space optical imaging system. The system uses an off-axis three-mirror optical structure with focal length of 1600 mm, F number of 8, and field of view angle of 20°×1°. Because of the large field of view, the image quality of general aspheric optimization design system cannot meet the requirements. In order to improve the freedom of system design, the Zernike polynomial freeform surface is applied to the tertiary mirror of the system, which enables the sagittal field of view to reach 20° further widening the imaging field of view. Degrees of freedom are increased effectively by the addition of the freeform surface. After optimization design, the optical transfer function of the system is better than 0.5 at 63 lp/mm, and the diffusion spot is optimized into Airy circle. The system energy concentration is high, and the imaging quality is close to the diffraction limitation.
? 2019 SPIE.
Number of references:8
Main heading:Optical systems
Controlled terms:Degrees of freedom (mechanics) - Image quality - Manufacture - Mirrors - Optical testing - Optical transfer function - Telescopes
Uncontrolled terms:Diffraction limitation - Free-form surface - Large field of views - Off-axis - Optical imaging system - Optical structures - Optimization design - Zernike polynomials
Classification code:537.1 Heat Treatment Processes - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 931.1 Mechanics
Numerical data indexing:Size 1.60e+00m
DOI:10.1117/12.2504915

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106643742
Title:Optical properties and applications of molybdenum disulfide/SiO2 saturable absorber fabricated by sol-gel technique
Authors:Lv, Ruidong (1); Chen, Zhendong (1); Liu, Sicong (1); Wang, Jiang (1); Li, Yongfang (1); Wang, Yonggang (1, 2); Wang, Yishan (2)
Author affiliation:(1) School of Physics and Information Technology, Shaanxi Normal University, Xi’an; 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China
Corresponding author:Wang, Yonggang(chinawygxjw@snnu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:5
Issue date:2019
Publication year:2019
Pages:6348-6356
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We investigate a new type of molybdenum disulfide (MoS2)-doped sol-gel glass saturable absorber (SA) fabricated by sol-gel technique. The reagents used for the sol-gel glass contain Tetraethyl orthosilicate (TEOS), ethanol, water, and hydrochloric acid. Different from the traditional ways of fabricating SAs, the MoS2 in our method is encapsulated by inorganic sol-gel glass instead of polymer compound with low laser damage resistance, which greatly increases the optical damage threshold of MoS2 SA. The MoS2-doped sol-gel glass as an SA is experimentally demonstrated in a passively mode-locked ytterbium-doped fiber laser (YDFL). Stable mode-locked pulse trains are successfully generated in the normal dispersion regime with a pulse width of 13.8 ps and the average output power of 34.6 mW. The fluctuation of the central wavelength and spectral bandwidth is as low as 0.9% in one week, which indicates that the mode-locking state has good environmental stability. To the best of our knowledge, it is the first example of sol-gel glass SA for ultrafast pulses generated in YDFL, which potentially gives a new approach to improve optical damage threshold and long-term working stability for broadband absorbers.
? 2019 Optical Society of America.
Number of references:40
Main heading:Molybdenum compounds
Controlled terms:Arsenic compounds - Fabrication - Fiber lasers - Glass - Laser damage - Layered semiconductors - Luminescence of inorganic solids - Optical properties - Passive mode locking - Saturable absorbers - Sol-gel process - Sol-gels - Sulfur compounds
Uncontrolled terms:Average output power - Environmental stability - Laser damage resistance - Molybdenum disulfide - Optical damage threshold - Passively mode-locked - Tetraethyl orthosilicates - Ytterbium-doped fiber lasers
Classification code:741.1 Light/Optics - 744 Lasers - 804 Chemical Products Generally - 812.3 Glass
Numerical data indexing:Percentage 9.00e-01%, Power 3.46e-02W, Time 1.38e-11s
DOI:10.1364/OE.27.006348
Funding details: Number: 2017JM6091, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Central University Special Fund Basic Research and Operating Expenses (GK201702005), Natural Science Foundation of Shaanxi Province, China (2017JM6091), and National Natural Science Foundation of China, CAS/SAFEA International Partnership Program for Creative Research Teams (61690222).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20180804823502
Title:A hybrid level set with semantic shape constraint for object segmentation
Authors:Wang, Bin (1); Yuan, Xiuying (1); Gao, Xinbo (1); Li, Xuelong (2); Tao, Dacheng (3, 4)
Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an; 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) UBTECH Sydney Artificial Intelligence Centre, University of Sydney, Darlington; NSW; 2008, Australia; (4) School of Information Technologies, Faculty of Engineering and Information Technologies, University of Sydney, Darlington; NSW; 2008, Australia
Corresponding author:Gao, Xinbo(xbgao@mail.xidian.edu.cn)
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:49
Issue:5
Issue date:May 2019
Publication year:2019
Pages:1558-1569
Article number:8293700
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper presents a hybrid level set method for object segmentation. The method deconstructs segmentation task into two procedures, i.e., shape transformation and curve evolution, which are alternately optimized until convergence. In this framework, only one shape prior encoded by shape context is utilized to estimate a transformation allowing the curve to have the same semantic expression as shape prior, and curve evolution is driven by an energy functional with topology-preserving and kernelized terms. In such a way, the proposed method is featured by the following advantages: 1) hybrid paradigm makes the level set framework possess the ability of incorporating other shape-related techniques about shape descriptor and distance; 2) shape context endows one single prior with semanticity, and hence leads to the competitive performance compared to the ones with multiple shape priors; and 3) additionally, combining topology-preserving and kernelization mechanisms together contributes to realizing a more reasonable segmentation on textured and noisy images. As far as we know, we propose a hybrid level set framework and utilize shape context to guide curve evolution for the first time. Our method is evaluated with synthetic, healthcare, and natural images, as a result, it shows competitive and even better performance compared to the counterparts.
? 2018 IEEE.
Number of references:54
Main heading:Image segmentation
Controlled terms:Curve fitting - Drop breakup - Level measurement - Numerical methods - Object recognition - Semantics - Topology
Uncontrolled terms:Active contour model - Computational model - Kernel - Kernelization - Level Set - Level Set method - Object segmentation - Shape - Shape contexts - Shape priors - Topology preserving
DOI:10.1109/TCYB.2018.2799999

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5688112
Title:Semantic Descriptions of High-Resolution Remote Sensing Images
Authors:Wang, Binqiang (1, 2); Lu, Xiaoqiang (1); Zheng, Xiangtao (1); Li, Xuelong (3)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China
Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Geoscience and Remote Sensing Letters
Abbreviated source title:IEEE Geosci. Remote Sens. Lett.
Volume:16
Issue:8
Issue date:August 2019
Publication year:2019
Pages:1274-1278
Article number:8633358
Language:English
ISSN:1545598X
E-ISSN:15580571
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Image captioning has attracted more and more attention in remote sensing filed since it provides more specific information than traditional tasks, such as classification. Though image captioning has gained some developments in recent years, it is difficult to describe the image in one simple sentence. To relieve the limitation, a novel captioning task is proposed and a novel framework is proposed to solve the novel task. The proposed framework uses semantic embedding to measure the image representation and the sentence representation. The captioning performance is improved by a proposed sentence representation (collective representation). Experimental results and human evaluations on three captioning data sets in remote sensing field demonstrate that the proposed framework can lead to advancement in image captioning results.
? 2019 IEEE.
Number of references:14
Controlled terms:data set - image analysis - image classification - image resolution - remote sensing
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/LGRS.2019.2893772
Funding details: Number: 61772510, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61806193, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: SKLST2017010, Acronym: -, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61806193, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26, and in part by the Xi'an Post-Doctoral Innovation Base Scientific Research Project.

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535067
Title:Glass preparing and integrating technology in X-ray grazing incidence optics
Authors:Qiang, Pengfei (1, 2); Su, Tong (1, 2); Liu, Zhe (1); Li, Linsen (1, 2); Li, Yao (1, 2); Liu, Yong-An (1, 2); Sheng, Lizhi (3)
Author affiliation:(1) 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) State Key Laboratory of Geo-Information Engineering, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an; 710119, China
Corresponding author:Sheng, Lizhi(lizhi_sheng@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110521L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:Glass preparing and integrating technologies are important in construction of grazing incidence optics, and these vital process are corresponding to the concentrating efficiency directly. Thermal slump glass under pressure supplied by stainless cloth with mass has been shown in this paper, and we obtained a below 1 nm roughness by coating Ir on slump glass segments. Then, A novel 6 dimensional integrating system for grazing incidence optics was developed to assemble all segments together, carbon ribs and epoxy were applied in the integrating process to make fragile glass segments stable. Finally, a glass-carbon-epoxy structure grazing incidence optics was developed and focal spot with diameter of 6 mm was obtained with parallel light. This kind of grazing incidence optics is supposed to concentrate large area X-ray photons to small area for reducing cost on space applications.
? 2019 SPIE.
Number of references:15
Main heading:Glass
Controlled terms:Carbon - Integrated control - Light - Photonics - Space applications - X rays
Uncontrolled terms:Carbon-epoxy - grazing - Grazing incidence optics - Integrating process - Integrating systems - Integrating technology - Reducing costs - X-ray grazing incidence
Classification code:656 Space Flight - 731.1 Control Systems - 741.1 Light/Optics - 804 Chemical Products Generally - 812.3 Glass - 932.1 High Energy Physics
Numerical data indexing:Size 1.00e-09m, Size 6.00e-03m
DOI:10.1117/12.2522653
Funding details: Number: Nos.SKLGIE2014-M-2-1, Acronym: -, Sponsor: State Key Laboratory of Geo-Information Engineering;Number: 61471357, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:This research was supported by West Light Foundation of The Chinese Academy of Sciences , National Natural Science Foundation of China (Nos.61471357) and State Key Laboratory of Geo-Information Engineering Foundation (Nos.SKLGIE2014-M-2-1).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191806859871
Title:A scanning-free wide-field single-fiber endoscopic image retrieval method based on optical transmission matrix
Authors:Xu, Chengfang (1, 2, 3); Zhuang, Bin (1, 3); Geng, Yi (1, 3); Chen, Hui (1, 3); Ren, Liyong (1); Wu, Zhaoxin (2)
Author affiliation:(1) Research Department of Information Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Department of Electronics Science and Technology, School of Electronic and Information Engineering, Xi'An Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:29
Issue:4
Issue date:March 6, 2019
Publication year:2019
Article number:046202
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Light waves transmitting in a multimode optical fiber (MMF) for endoscopic imaging, due to modal dispersion, inevitably suffer two severe distortions: on the way in for illuminating and on the way out for imaging, which becomes a big challenge when using a single MMF for endoscopic applications. In this paper, based on obtaining the optical transmission matrix of the MMF working in the endoscopic mode, we propose a new method for retrieving endoscopic images from speckle fields, where the two distortions could be eliminated simultaneously. Our experimental results demonstrate that the object images can be well reconstructed directly from distorted waves. In addition, no scanning operation is required when collecting images, which is timesaving. Such an efficient method might have potential applications for wide-field and ultrathin fiber endoscopic imaging.
? 2019 Astro Ltd.
Number of references:32
Main heading:Light transmission
Controlled terms:Endoscopy - Image retrieval - Multimode fibers - Optical fibers
Uncontrolled terms:Coherence imaging - Computational imaging - Endoscopic imaging - Single fiber - Transmission matrix
Classification code:461.6 Medicine and Pharmacology - 741.1 Light/Optics - 741.1.2 Fiber Optics
DOI:10.1088/1555-6611/ab0365

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191506772849
Title:A Fast Lossless Data Compression Method for the Wedge Filter Spectral Imager
Title of translation:适用于楔形滤光片型光谱成像仪的快速无损数据压缩方法
Authors:Li, Hong-Bo (1, 2); Hu, Bing-Liang (1); Yu, Lu (1, 2); Wei, Rui-Yi (1); Yu, Tao (1)
Author affiliation:(1) Laboratory of Spectral Imaging Technique, 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:Hu, Bing-Liang(hbl@opt.ac.cn)
Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi
Volume:39
Issue:1
Issue date:January 1, 2019
Publication year:2019
Pages:297-302
Language:Chinese
ISSN:10000593
CODEN:GYGFED
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Wedge filter spectral imager, with no moving components and low complexity, has become an important development direction of low cost miniature imaging spectrometer. Based on the state of the art hyperspectral lossless compression standard CCSDS123, we propose a lossless data compression method for the wedge filter spectral imager. The proposed method redefines the local difference vector in CCSDS123, taking fully advantage of the spatial-spectral co-modulation characteristics of the wedge filter spectral imager. To compress the raw data from a wedge filter spectral imager, the compression encoder firstly predicts the sample value using its local sum and local difference vector, then computes a prediction residual and the corresponding mapped prediction residual, finally encodes the mapped prediction residual via a sample-adaptive entropy coding approach. The proposed method can effectively compress the raw data from a wedge filter spectral imager by using the local correlation in the spatial-spectral space. To verify the compression performance of the proposed method, experiments are taken on 6 raw datasets containing different scenes. The results show that the proposed method surpasses the original CCSDS123 method by about 21.62% higher compression ratio on the test datasets with almost the same computational time.
? 2019, Peking University Press. All right reserved.
Number of references:15
Main heading:Image compression
Controlled terms:Forecasting - Modulation - Spectroscopy
Uncontrolled terms:CCSDS123 - Compression performance - Difference vectors - Higher compression ratios - Lossless compression - Lossless data compression method - Modulation characteristics - Wedge filter
Numerical data indexing:Percentage 2.16e+01%
DOI:10.3964/j.issn.1000-0593(2019)01-0297-06

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806535050
Title:Athermalization for the supporting structure of space camera primary and secondary mirrors
Authors:Lin, Shangmin (1); Wang, Hu (1); Liu, Yang (1); Xue, Yaoke (1); Xiang, Binbin (2); Liu, Jie (1); Xie, Yongjie (1); Liu, Meiying (1, 3); Wu, Liquan (3)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) Xinjiang Astronomical Observatory, CAS, Urumqi; 830011, China; (3) University of CAS, Beijing; 100049, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:110520U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:In order to meet the requirements of high-precision alignment of primary and secondary mirrors of space camera in thermal environment, we develop a new supporting structure which can eliminate heat affect between mirrors automatically. Through the simulation analysis, we have verified this structural design is feasible. According to requirements of the optical system, an integrated machining scheme with three-bar supporting structure for the secondary mirror is proposed. The automatic athermalization of the primary and secondary mirrors supporting structure is confirmed by structural analysis and optimization. The displacement between the primary mirror and secondary mirrors in the thermal environment range of-20° ~ +60°C is analyzed by using the PATRAN software, and the results show the position change is within 0.01mm. The structural size of the secondary mirror supporting cylinder is optimized, and the effect of stray light suppression for the multilayer sleeve visor is analyzed and verified by using the TRACEPRO software. The results show that the proposed structural design can achieve the high stability of the primary and secondary mirrors supporting structure and the good effect of stray light suppression.
? 2019 SPIE.
Number of references:8
Main heading:Structural optimization
Controlled terms:C (programming language) - Cameras - Mirrors - Optical systems - Photonics - Stray light
Uncontrolled terms:Athermalization - Secondary mirror - Space cameras - Stray light suppression - Supporting structure
Classification code:723.1.1 Computer Programming Languages - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 921.5 Optimization Techniques
Numerical data indexing:Size 1.00e-05m
DOI:10.1117/12.2521897

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20192407047822
Title:Chip-integrated metasurface for versatile and multi-wavelength control of light couplings with independent phase and arbitrary polarization
Authors:Meng, Yuan (1, 2); Hu, Futai (1); Liu, Zhoutian (1); Xie, Peng (2, 3); Shen, Yijie (1); Xiao, Qirong (1); Fu, Xing (1); Bae, Sang-Hoon (2); Gong, Mali (1, 4)
Author affiliation:(1) State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing; 100084, China; (2) Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge; MA; 02139, United States; (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) State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China
Corresponding author:Gong, Mali(gongml@mail.tsinghua.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:27
Issue:12
Issue date:June 10, 2019
Publication year:2019
Pages:16425-16439
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:While metasurfaces are now widely considered in free-space optics, their potential for coupling and tailoring guided waves is not fully explored. Here we transfer the Jones matrix method to target versatile on-chip coupling using metasurface-patterned photonic waveguides around the telecommunication wavelength of 1.55 μm, which can accommodate both propagation and Pancharatnam-Berry phase metasurfaces for guided waves. One can either encode two arbitrary and independent phase profiles to any pair of orthogonal polarizations or deploy complete control over both the phase and polarization of coupled modes. A set of design scenarios synergizing silicon nanoantennas and low-loss silicon-nitride waveguides are proposed, including directional couplers with mode-selectivity and polarization splitters with directionality ranging from 10 to 20 dB. Furthermore, our optimization method can be further extended to cover multiple working wavelengths. Exemplary on-chip color routers are also numerically demonstrated. This chip-integrated metasurface platform further translates the concept of a metasurface into photonic integrated circuits, serving as a positive paradigm for versatile and complete control over waveguide optical signals and motivating chip-scale applications such as polarization/wavelength demultiplexers, optical switches, and multifunctional mode converters.
? 2019 Optical Society of America.
Number of references:48
Main heading:Polarization
Controlled terms:Guided electromagnetic wave propagation - Optical switches - Silicon nitride - Transfer matrix method - Waveguides
Uncontrolled terms:Arbitrary polarization - Jones matrix method - Orthogonal polarizations - Pancharatnam-Berry phase - Photonic integrated circuits - Polarization splitters - Silicon nitride waveguides - Telecommunication wavelengths
Classification code:711.1 Electromagnetic Waves in Different Media - 714.3 Waveguides - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 921 Mathematics
Numerical data indexing:Decibel 1.00e+01dB to 2.00e+01dB
DOI:10.1364/OE.27.016425
Funding details: Number: 501100004826, Acronym: -, Sponsor: Natural Science Foundation of Beijing Municipality;Number: 2017000020124G044, Acronym: -, Sponsor: -;
Funding text:Natural Science Foundation of Beijing Municipality (501100004826); Beijing Young Talents Support Project (2017000020124G044).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190706488938
Title:Precision of the attitude algorithm of the strap-down inertial navigation system
Authors:Zhang, Wei (1); Shi, Kui (1); Ai, Yun (1); Guo, Juan (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 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:10839
Part number:1 of 1
Issue title:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Issue date:2019
Publication year:2019
Article number:1083907
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510623200
Document type:Conference article (CA)
Conference name:9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Conference date:June 26, 2018 - June 29, 2018
Conference location:Chengdu, China
Conference code:144715
Sponsor:Chinese Academy of Sciences, Institute of Optics and Electronics (IOE); The Chinese Optical Society (COS)
Publisher:SPIE
Abstract:Based on the principle of the strap-down inertial navigation system and the attitude algorithm, a novel evaluation method is proposed. It could be used to effectively diagnostic the precision of the attitude algorithm. The experimental data including Algorithm 1 (N=2, P=0, optimal two-sample), Algorithm 2 (N=2, P=1) and Algorithm 3 (N=2, P=2) is recorded. The precision of the three algorithms is evaluated by calculating the relative error. In addition, the influence of the sampling frequency on the precision is investigated. The test results show that the precision of Algorithm 2 and Algorithm 3 is approximate; as the sampling frequency is improved from 1Hz to 20Hz, the precision of the attitude algorithm can research 0.08°. When choosing the attitude algorithm of the strap-down inertial navigation system, increasing the number of the sample not always depresses the coning error, improving the sampling frequency and using the former attitude to renew the number of the sample of the period could improve the precision of the attitude algorithm, further.
? 2019 SPIE.
Number of references:6
Main heading:Inertial navigation systems
Controlled terms:Air navigation - Errors - Manufacture - Navigation - Optical testing
Uncontrolled terms:Attitude algorithms - Coning errors - Precision - Sampling frequencies - Strap-down inertial navigation systems
Classification code:431.5 Air Navigation and Traffic Control - 537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems
Numerical data indexing:Frequency 1.00e+00Hz to 2.00e+01Hz
DOI:10.1117/12.2504808

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20190806534747
Title:The design of laser communication terminal test and evaluation station
Authors:Li, Jing (1); Zhao, Jianke (1); Xue, Xun (1, 2, 3); Hu, Xinrong (4); Wang, Zhengfeng (1); Kewei, E. (1); Liu, Kai (1)
Author affiliation:(1) 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) Institute of Space Optics, Xi'An Jiaotong University, Xi'an; 710049, China; (4) Chinese Academy of Space Technology (xi'An), Xi'an; 710000, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:11052
Part number:1 of 1
Issue title:Third International Conference on Photonics and Optical Engineering
Issue date:2019
Publication year:2019
Article number:1105218
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510627796
Document type:Conference article (CA)
Conference name:3rd International Conference on Photonics and Optical Engineering
Conference date:December 5, 2018 - December 8, 2018
Conference location:Xi'an, China
Conference code:144910
Sponsor:Chinese Optical Society; High-speed Photography and Photonics Committee of Chinese Optical Society; Optics and Photonics Society of Singapore; Shaanxi Optical Society
Publisher:SPIE
Abstract:Dues to its large capacity of information, super-speed transmission and high stability, laser communication has become a popular kind of satellite communication technology. Different from other kinds of communication technology, laser communication terminals (LCT) consists of optical systems with high imaging quality, high precise and rapid tracking systems. Testing the LCT on land is necessary to ensure its performance on the satellite. This article introduces a LCT-test and evaluation station (LCT-TES) in the laboratory. The LCT-TES is a high quality optical system providing laboratory measurements of the key characteristics of LCT, such as power testing, energy distribution of light spot in the far field, and the angle of beam divergence. The test precision of LCT-TES is also analyzed in this paper.
? 2019 SPIE.
Number of references:9
Main heading:Optical communication
Controlled terms:Optical design - Optical systems - Photonics - Satellite communication systems
Uncontrolled terms:Communication technologies - Energy distributions - Key characteristics - Laboratory measurements - Laser communication terminals - Satellite communication technologies - Test and evaluation - Wavefront errors
Classification code:655.2.1 Communication Satellites - 717.1 Optical Communication Systems - 741.1 Light/Optics - 741.3 Optical Devices and Systems
DOI:10.1117/12.2522010
Funding details:
Funding text:This work is supported by the Western light Foundation of Chinese Academy of Science under Grant no. XAB2016B18

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20183505758954
Title:Tunable broadband emission from red to blue by gamma radiation in multicomponent phosphate glasses????(Open Access)
Authors:He, Quanlong (1, 2); Wang, Pengfei (1); Li, Weinan (1); Sun, Mengya (1, 2); Lu, Min (1); 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, China; (2) University of Chinese Academy of Sciences (UCAS), 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:102
Issue:1
Issue date:January 2019
Publication year:2019
Pages:48-52
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:Blackwell Publishing Inc.
Abstract:We demonstrate for the first time that the tunable broadband emission from red to blue can be obtained by gamma radiation in multicomponent phosphate glasses. Gamma radiation causes the increased phosphate-related non-bridging oxygen hole center and oxygen hole center defects, which lead to the enhanced emission peaking at 452 nm. Meanwhile, the vibration amplitude of O-P-O chain's internal decrease, resulting in the decreased emission at 660 nm. Besides, the increased isolated phosphate units (Q0 and Q1), as well as the gradual decrease in P atoms that make up the main phosphate chain contribute to the blue-shift of the main emission peak at 616 nm, which directly results in the tunable broadband emission from 616 to 460 nm. The gamma radiation process endows this type of multicomponent phosphate glasses with promising applications in solid-state lighting devices.
? 2018 The American Ceramic Society
Number of references:23
Main heading:Gamma rays
Controlled terms:Chains - Glass - Lighting - Oxygen
Uncontrolled terms:Broadband emission - Enhanced Emission - Nonbridging oxygen hole center - Oxygen hole centers - Phosphate glass - Radiation process - Solid state lighting - Vibration amplitude
Numerical data indexing:Size 4.52e-07m, Size 6.16e-07m to 4.60e-07m, Size 6.16e-07m, Size 6.60e-07m
DOI:10.1111/jace.15986
Funding details: Number: XAB2016A08, Acronym: -, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 201704910379, Acronym: -, Sponsor: China Scholarship Council;Number: 61675229, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 201704910379, Acronym: -, Sponsor: China Scholarship Council;Number: -, Acronym: -, Sponsor: China Scholarship Council;Number: 2017446, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: XAB2016A08, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: Youth Innovation Promotion Association;Number: 61675229, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China, Grant/Award Number: 61775235, 61675229, 61307046; Youth Innovation Promotion Association of the Chinese Academy of Sciences, Grant/Award Number: 2017446; West Young Scholars Program of the Chinese Academy of Sciences, Grant/Award Number: XAB2016A08; State Scholarship Fund of China Scholarship Council, Grant/Award Number: 201704910379We are thankful for the financial support from the National Natural Science Foundation of China (NSFC No. 61775235, 61675229, 61307046), West Young Scholars Program of the Chinese Academy of Sciences (XAB2016A08), and Youth Innovation Promotion Association, CAS (2017446). The authors thank Dr. Xiaohu Mi in School of Physics & Information Technology, Shaanxi Normal University, for his help on Raman spectra measurements. Pengfei Wang gives his thanks for the support of State Scholarship Fund of China Scholarship Council (CSC) (No. 201704910379).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20191106643944
Title:Remote Sensing Image Scene Classification Using Rearranged Local Features
Authors:Yuan, Yuan (1); Fang, Jie (1, 2); Lu, Xiaoqiang (1); Feng, Yachuang (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:Lu, Xiaoqiang(luxq666666@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:3
Issue date:March 2019
Publication year:2019
Pages:1779-1792
Article number:8485313
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Remote sensing image scene classification is a fundamental problem, which aims to label an image with a specific semantic category automatically. Recently, deep learning methods have achieved competitive performance for remote sensing image scene classification, especially the methods based on a convolutional neural network (CNN). However, most of the existing CNN methods only use feature vectors of the last fully connected layer. They give more importance to global information and ignore local information of images. It is common that some images belong to different categories, although they own similar global features. The reason is that the category of an image may be highly related to local features, other than the global feature. To address this problem, a method based on rearranged local features is proposed in this paper. First, outputs of the last convolutional layer and the last fully connected layer are employed to depict the local and global information, respectively. After that, the remote sensing images are clustered to several collections using their global features. For each collection, local features of an image are rearranged according to their similarities with local features of the cluster center. In addition, a fusion strategy is proposed to combine global and local features for enhancing the image representation. The proposed method surpasses the state of the arts on four public and challenging data sets: UC-Merced, WHU-RS19, Sydney, and AID.
? 1980-2012 IEEE.
Number of references:52
Main heading:Image classification
Controlled terms:Convolution - Deep learning - Image enhancement - Image fusion - Neural networks - Remote sensing - Semantics
Uncontrolled terms:Competitive performance - Convolutional neural network - Feature fusion - Global informations - Image representations - Local feature - Remote sensing images - Scene classification
Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing
DOI:10.1109/TGRS.2018.2869101

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:20184606067275
Title:Wide spectrum responsivity detectors from visible to mid-infrared based on antimonide
Authors:Guo, Chunyan (1, 2, 4); Sun, Yaoyao (3, 4); Jia, Qingxuan (3, 4); Jiang, Zhi (3, 4); Jiang, Dongwei (3, 4); Wang, Guowei (3, 4); Xu, Yingqiang (3, 4); Wang, Tao (1); Tian, Jinshou (1); Wu, Zhaoxin (2); Niu, Zhichuan (3, 4)
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of Chinese Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) Xi'an Jiaotong University, Xi'an; 710049, China; (3) State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductor, Chinese Academy of Science, Beijing; 100083, China; (4) College of Material Science and Optoelectronic Technology, University of Chinese Academy of Science, Beijing; 100049, China
Corresponding author:Niu, Zhichuan(zcniu@semi.ac.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:96
Issue date:January 2019
Publication year:2019
Pages:1-6
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:A kind of wide spectrum infrared detectors based on InAs/GaSb type-II superlattices (T2SLs) operating from 0.5 μm to 5 μm wavelength range is reported. The materials were grown by Molecular Beam Epitaxy (MBE) on GaSb substrates. Diverse types and sizes microstructure are fabricated on the surface of the detector to form the photon traps (PTs) array. PTs decrease the reflectivity and increase the light absorption of epitaxial material. Compared with the planar mesa detectors without antireflection (AR) film, detectors with PTs array exhibits a high responsivity of 0.86 A/W at 1160 nm and maximum D* reaches to 109 cm Hz1/2/W in visible wavelength. Also, the PTs processed on detector augment spectral response and QE in infrared wavelength. The peak responsivity of the detector with PTs is to 1.35 A/W and QE can exceed to 0.76 in the infrared wavelength. The infrared detector with PTs is attractive for numerous applications.
? 2018 Elsevier B.V.
Number of references:38
Main heading:Gallium compounds
Controlled terms:Antimony compounds - III-V semiconductors - Indium antimonides - Indium arsenide - Infrared detectors - Light absorption - Molecular beam epitaxy - Photons
Uncontrolled terms:Antireflection films - Epitaxial materials - Inas/gasb type-ii superlattices - Infrared wavelengths - Spectral response - Visible wavelengths - Wavelength ranges - Wide spectrum
Classification code:741.1 Light/Optics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 931.3 Atomic and Molecular Physics - 944.7 Radiation Measuring Instruments
Numerical data indexing:Size 1.16e-06m, Size 5.00e-07m to 5.00e-06m
DOI:10.1016/j.infrared.2018.10.037
Funding details: Number: 2018YFA0209104, Acronym: -, Sponsor: -;Number: 2016YFB0402403, Acronym: -, Sponsor: -;
Funding text:This work is supported by the National Key Technologies R&D Program of China (Grant: 2018YFA0209104 , 2016YFB0402403 ).

Database:Compendex
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5440073
Title:GETNET: A General End-To-End 2-D CNN Framework for Hyperspectral Image Change Detection
Authors:Wang, Qi (1); Yuan, Zhenghang (1); Du, Qian (2); Li, Xuelong (3, 4)
Author affiliation:(1) School of Computer Science, Center for OPTical IMagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710072, China; (2) Department of Electrical and Computer Engineering, Mississippi State University, Starkville; MS; 39762, United States; (3) 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 author:Wang, Qi(crabwq@gmail.com)
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:57
Issue:1
Issue date:January 2019
Publication year:2019
Pages:3-13
Article number:8418840
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Change detection (CD) is an important application of remote sensing, which provides timely change information about large-scale Earth surface. With the emergence of hyperspectral imagery, CD technology has been greatly promoted, as hyperspectral data with high spectral resolution are capable of detecting finer changes than using the traditional multispectral imagery. Nevertheless, the high dimension of the hyperspectral data makes it difficult to implement traditional CD algorithms. Besides, endmember abundance information at subpixel level is often not fully utilized. In order to better handle high-dimension problem and explore abundance information, this paper presents a general end-To-end 2-D convolutional neural network (CNN) framework for hyperspectral image CD (HSI-CD). The main contributions of this paper are threefold: 1) mixed-Affinity matrix that integrates subpixel representation is introduced to mine more cross-channel gradient features and fuse multisource information; 2) 2-D CNN is designed to learn the discriminative features effectively from the multisource data at a higher level and enhance the generalization ability of the proposed CD algorithm; and 3) the new HSI-CD data set is designed for objective comparison of different methods. Experimental results on real hyperspectral data sets demonstrate that the proposed method outperforms most of the state of the arts.
? 1980-2012 IEEE.
Number of references:35
Controlled terms:algorithm - artificial neural network - data set - image analysis - imagery - machine learning - pixel - remote sensing - spectral resolution
Classification code:71.8.5.4 Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2018.2849692
Funding text:Fundamental Research Funds for the Central Universities under Grant 3102017AX010

Database:GEOBASE
Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Accession number:5462099
Title:Locality and structure regularized