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2017年46卷7期30篇论文

<RECORD 1>

Accession number:20173204018671

Title:Evolution of the Intensity of Partially Coherent Airy Beam in Atmospheric Turbulence

Authors:Ke, Xi-Zheng (1); Wang, Song (1)

Author affiliation:(1) School of Automation and Information Engineering, Xi'an University of Technology, Xi'an; 710048, China

Corresponding author:Wang, Song(huluw1991@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0701001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to inhibit the effects of atmospheric turbulence by using the non-diffracting, self recovery and self bending property of Airy beam and realize the remote wireless optical communication, the intensity evolution of partially coherent Airy beams propagating in turbulent atmosphere were studied. By using the cross spectral density function of Gauss-Schell model, the generalized Huygens-Finel principle and the methods of Rytov phase approximation, the expressions for the average intensity of partially coherent Airy in turbulent atmosphere were derived. Then, the influences of propagation distance, turbulence intensity and other parameters on the intensity distribution were simulated, and the influence of the beam parameters on the intensity distribution was verified by experiments. The results show that the side lobe of the partially coherent Airy beam is gradually attenuated and the main lobe is gradually spread, with the increase of the propagation distance. When the spread is long enough, the side lobe is gradually lost, and the main lobe is gradually evolved into Gauss distribution. The simulation and experimental results show that the smaller the truncation factor is, the longer the characteristic length and the coherence length is, so that the beam intensity distribution is maintained integrally. &copy; 2017, Science Press. All right reserved.

Number of references:18

Main heading:Atmospheric turbulence

Controlled terms:Atmospheric thermodynamics - Optical communication - Spectral density - Wireless telecommunication systems

Uncontrolled terms:Airy beams - Characteristic length - Cross spectra - Cross spectral densities - Intensity distribution - Optical wireless communications - Propagation distances - Wireless optical communication

Classification code:443.1  Atmospheric Properties - 717.1  Optical Communication Systems

DOI:10.3788/gzxb20174607.0701001

Funding Details: Number; Acronym; Sponsor: 60977054; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61377080; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 2>

Accession number:20173204018681

Title:Refractive Index Detection Based on Beat-frequency of Cladding-carved DBR Fiber Lasers

Authors:Li, Meng-Meng (1); Liu, Bo (1); Liang, Yi-Zhi (1); Liang, Hao (1); Li, Jie (1); Guan, Bai-Ou (1)

Author affiliation:(1) Institute of Photonics Technology, Jinan University, Guangzhou; 510632, China

Corresponding author:Li, Jie(tjieli@jnu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706006

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A kind of cladding-carved Distributed Bragg Reflection (DBR) fiber laser was proposed for fiber laser refractive index detection. The core sensing unit is a single longitudinal mode dual polarization DBR fiber laser, the beat signal generated by the structure birefringence is used as the sensor signal to detect the refractive index. Frequency coding using in the experiment has the advantages of high sensitivity and is easy to demodulate. Using the thermal effect of the CO<inf>2</inf>laser can carve the cavity of DBR fiber laser. The effects of different structural parameters on the sensitivity characteristics were studied by controlling the scanning range and the power of the CO<inf>2</inf>laser. The effects of different structural parameters on the sensitivity characteristics were studied. The measured optimum sensitivity is -240 MHz / RI-unit. In addition, the temperature sensing characteristics of the structure were tested, and the sensitivity was increased by 21% to 1.73 MHz/&#8451;, compared to the non-carved structure. The device has the advantages of compact structure, high stability, simple preparation and low cost, and can be used to further study of the sensing and multiplex characteristics of DBR fiber lasers. &copy; 2017, Science Press. All right reserved.

Number of references:14

Main heading:DBR lasers

Controlled terms:Carbon dioxide - Carbon dioxide lasers - Fiber lasers - Fiber optics - Fibers - Laser optics - Optical resonators - Refractive index - Temperature sensors

Uncontrolled terms:All fiber - Beat frequency - CO2 laser cladding-carved - Distributed Bragg reflection - Fiber optics sensors

Classification code:741  Light, Optics and Optical Devices - 744  Lasers - 804.2  Inorganic Compounds - 944.5  Temperature Measuring Instruments

DOI:10.3788/gzxb20174607.0706006

Funding Details: Number; Sponsor: 2014A0303133; Natural Science Foundation of Guangdong Province - Number; Acronym; Sponsor: 61575083; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 3>

Accession number:20173204018687

Title:Coherence Detection of Frequency of Underwater Multi-source Acoustic Signals Based on Hilbert Transforms

Authors:Zhang, Xiao-Lin (1); Li, Kai-Qin (1, 3); Liu, Gang (2); Zhang, Lie-Shan (1); Tang, Wen-Yan (1)

Author affiliation:(1) School of Electrical Engineering &amp; Automation, Harbin Institute of Technology, Harbin; 150001, China; (2) Shanghai Institute of Satellite Engineering, Shanghai; 200240, China; (3) No.10 Institute of China Electronic and Technology Corporation, Chengdu; 610036, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0712001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to realize the detection and recognition of underwater acoustic signals, the characteristic expression of coherent detection signal under spectral aliasing was given theoretically, and a kind of signal demodulation method based on Hilbert transform was proposed by studying the characteristics of underwater multi-source coherence detection signals. Acoustic frequency demodulation of underwater multi-sources was realized in case of spectral aliasing. In this method, the Hilbert transform is carried out after filtering and smoothing processes to obtain the analytic form of the signal. Then, the second filtering and smoothing processes are carried out for the squares of the analytic signal modulo to separate the aliasing bands. After that, the spectrum of the obtained signal is analyzed. Frequency of each underwater acoustic signal can be calculated according to the frequency shift value finally. A laser coherence detection system was built in the optical darkroom, and the underwater acoustic signals of 2~6 kHz were experimented. The results show that the proposed method can effectively separate the signal bands that are mixed together in the detection signal, the accurately extract the frequency of each underwater acoustic signal, and the frequency extraction repeatability is not more than 2.5 Hz. &copy; 2017, Science Press. All right reserved.

Number of references:19

Main heading:Underwater acoustics

Controlled terms:Acoustic wave propagation - Acoustic waves - Acoustooptical effects - Demodulation - Hilbert spaces - Laser interferometry - Mathematical transformations - Optical variables measurement - Signal detection - Spectrum analysis

Uncontrolled terms:Acoustic frequency - Coherent detection - Frequency extraction - Hilbert transform - Signal demodulation - Smoothing process - Spectral aliasing - Underwater acoustic signal

Classification code:716.1  Information Theory and Signal Processing - 751.1  Acoustic Waves - 751.2  Acoustic Properties of Materials - 921  Mathematics - 921.3  Mathematical Transformations - 941.4  Optical Variables Measurements

Numerical data indexing:Frequency 2.00e+03Hz to 6.00e+03Hz, Frequency 2.50e+00Hz

DOI:10.3788/gzxb20174607.0712001

Funding Details: Number; Acronym; Sponsor: 61108073; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 4>

Accession number:20173204018691

Title:Study on the Spontaneous Emission in a Two-dimensional Metal Structure with Graphene

Authors:Ren, Hao (1); Wang, Sheng (1); Wang, Li-Hua (1); Xu, Jie (1); Huang, Zhi-Xiang (1); Wu, Xian-Liang (1)

Author affiliation:(1) Key Laboratory of intelligent Computing &amp; Signal Processing, Anhui University, Hefei; 230039, China

Corresponding author:Huang, Zhi-Xiang(zxhuang@ahu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0727002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:The monolayer grapheme film was employed in the metal structures when researching the spontaneous emission of atoms. The spontaneous emission of atoms was controlled by the special photoelectric properties of graphene. The local density of electromagnetic states was numerically calculated with the electric dyadic Green's function through the finite-difference frequency-domain method. The results show that with the increase of chemical potential, spontaneous emission peak appears blue shift phenomenon and the spontaneous emission are enhanced. The tunability of the peak position and amplitude of the spontaneous emission of the atoms is theoretically achieved. The theoretical results can be used as references for the fabrication and optimization of novel nano-devices and optoelectronic devices. &copy; 2017, Science Press. All right reserved.

Number of references:23

Main heading:Frequency domain analysis

Controlled terms:Atoms - Chemical potential - Graphene - Green's function - Mooring - Optoelectronic devices - Quantum optics - Spontaneous emission - Surface plasmon resonance

Uncontrolled terms:Blue shift phenomenon - Electric dyadic Green's function - Finite difference frequency domain methods - Local density - Metal structures - Peak position - Photoelectric property - Two-dimensional metals

Classification code:711  Electromagnetic Waves - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 761  Nanotechnology - 801.4  Physical Chemistry - 804  Chemical Products Generally - 921  Mathematics - 921.3  Mathematical Transformations - 931.3  Atomic and Molecular Physics - 931.4  Quantum Theory; Quantum Mechanics

DOI:10.3788/gzxb20174607.0727002

Funding Details: Number; Acronym; Sponsor: 51277001; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61471001; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61601166; NSFC; National Natural Science Foundation of China - Number; Sponsor: KJ2015A202; Natural Science Foundation of Anhui Province

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 5>

Accession number:20173204018679

Title:A Quadratic Correlation Method for Vibration Localization Based on Dual M-Z Fiber Sensor

Authors:Yang, Shun-Zhi (1); Zhang, Zhi-Yong (1); Shao, Li-Yang (1); Yan, Lian-Shan (1)

Author affiliation:(1) Center for Information Photonics &amp; Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu; 610031, China

Corresponding author:Zhang, Zhi-Yong(zhiyongzhang@home.swjtu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706004

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:The dual Mach-Zehnder interferometer-type distributed optical fiber sensing system is susceptible to environmental noise and system noise due to its high sensitivity, which makes a large error in calculating the position of the disturbance signal by direct cross correlation algorithm. The quadratic cross correlation algorithm was used to process the two received signals, and then process the autocorrelation of one signal. The disturbance signal was located by estimating the delay of the two signals. With the improved method, it can reduce the error caused by noise and improve the calculation accuracy. The theoretical simulation and analysis of the algorithm were carried out, and the experimental device was experimentally verified. The experimental results show that compared with the results of using the direct correlation algorithm, the proposed algorithm can effectively improve the positioning accuracy of the disturbance signal and has higher real-time performance. &copy; 2017, Science Press. All right reserved.

Number of references:14

Main heading:Optical correlation

Controlled terms:Optical fibers - Stress intensity factors - Time delay

Uncontrolled terms:Cross correlations - Cross-correlation algorithm - Direct cross correlations - Distributed optical fiber sensing - Distributed optical fiber sensors - Dual mach-zehnder interferometers - Perimeter protection - Time delay estimation

Classification code:713  Electronic Circuits - 741.1  Light/Optics - 741.1.2  Fiber Optics

DOI:10.3788/gzxb20174607.0706004

Funding Details: Number; Acronym; Sponsor: 61475128; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 6>

Accession number:20173204018697

Title:The Design of Scanning Laser Optical Tomography Imaging System and Its Applications

Authors:Xue, Cheng-Zhi (1, 2, 4); Li, Ya-Min (1, 2, 5); Li, Gui-Ye (1, 2, 3); Li, Ying-Chao (1, 2, 3); Hu, Xue-Juan (1, 2, 3); Chen, Ling-Ling (1, 2, 3)

Author affiliation:(1) Shenzhen Key Laboratory of Laser Engineering, Shenzhen; Guangdong; 518060, China; (2) Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Shenzhen University, Shenzhen; Guangdong; 518060, China; (3) College of Optoelectronic Engineering, Shenzhen University, Shenzhen; Guangdong; 518060, China; (4) College of Electronic Science and Technology, Shenzhen University, Shenzhen; Guangdong; 518060, China; (5) College of Life Sciences and Oceanography, Shenzhen University, Shenzhen; Guangdong; 518060, China

Corresponding author:Chen, Ling-Ling(l.chen10@szu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0722003

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:This paper presented a self-designed scanning laser optical tomography mesoscopic imaging system based on LabVIEW and explored its capabilities to image intact biological organs or tissues. The system is consisted of an aligned laser, a four dimension translation stage, a scanning mirror and a photomultiplier tube. The spatial resolution of the system is better than 20 &mu;m with an imaging field of 1 cm. The system operation process and preliminary biomedical applications were demonstrated through the 3-D autofluorescence imaging of a mouse lung. Compared to the traditional biomedical optical imaging techniques, scanning laser optical tomography provides the advantages of high photon collection efficiency, large sample range and easy operation. &copy; 2017, Science Press. All right reserved.

Number of references:20

Main heading:Scanning

Controlled terms:Biological organs - Fluorescence microscopy - Imaging systems - Imaging techniques - Laser mirrors - Medical applications - Optical tomography - Photomultipliers - Superconducting materials

Uncontrolled terms:Autofluorescence imaging - Biomedical applications - Biomedical optical imaging - LabViEW - Mesoscopics - Photo multiplier tube - Scanning lasers - Three-dimensional information

Classification code:461.2  Biological Materials and Tissue Engineering - 708.3  Superconducting Materials - 714.1  Electron Tubes - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 931.4  Quantum Theory; Quantum Mechanics

Numerical data indexing:Size 1.00e-02m, Size 2.00e-05m

DOI:10.3788/gzxb20174607.0722003

Funding Details: Number; Acronym; Sponsor: 61505112; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 7>

Accession number:20173204018700

Title:Effect of L-C Combination Circuit on Electronic Noise of Shot Noise Photodetector

Authors:Wang, Shao-Feng (1, 2); Dong, Rui-Fang (1, 2); Liu, Tao (1, 2); Zhang, Shou-Gang (1, 2)

Author affiliation:(1) Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Science, Xi'an; 710600, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Dong, Rui-Fang(dongruifang@ntsc.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0704001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:By analyzing the electronic noise sources of shot noise photodetector based on the L-C coupled transimpedance amplifier circuit, the effect of the parasitic capacitance of the utilized inductance on the electronic noise was theoretically investigated and experimentally validated. The result shows that the parasitic capacitance of the inductor may increase the electronic noise of the detector via increasing the input voltage noise gain of the transimpedance amplifier. Given that the total inductance of the L-C circuit is 1 mH, the contribution to the electronic noise of choosing two series inductor with 0.5 mH each is much smaller than that of choosing a single inductor with 1mH. Furthermore, the higher the self resonant frequency of the inductor is, the smaller the parasitic capacitance and thus the smaller the electronic noise will be. The experiment results show that, at the analyzing frequency of 2.5 MHz, the electronic noise reduction of the two inductors in series with inductance of two 0.5 mH and resonance frequency of 6 MHz can reach up to 3 dB, compared to that using a single 1 mH inductor with the resonance frequency of 1.6 MHz. Under a certain incident optical power, the signal-to-noise ratio of the detector can be thus improved effectively. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Shot noise

Controlled terms:Capacitance - Detectors - Electric inductors - Inductance - Natural frequencies - Operational amplifiers - Photodetectors - Photons - Resonance - Signal to noise ratio  - Timing circuits

Uncontrolled terms:Electronic noise - Input voltages - Noise detectors - Parasite - Parasitic capacitance - Resonance frequencies - Self resonant frequency - Series inductor

Classification code:701.1  Electricity: Basic Concepts and Phenomena - 713.1  Amplifiers - 713.4  Pulse Circuits - 716.1  Information Theory and Signal Processing - 931.1  Mechanics - 931.3  Atomic and Molecular Physics

Numerical data indexing:Decibel 3.00e+00dB, Frequency 1.60e+06Hz, Frequency 2.50e+06Hz, Frequency 6.00e+06Hz, Inductance 1.00e-03H, Inductance 5.00e-04H

DOI:10.3788/gzxb20174607.0704001

Funding Details: Number; Acronym; Sponsor: 11273024; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 91336108; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 91636101; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: Y133ZK1101; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 8>

Accession number:20173204018696

Title:Optical System Design of Star Simulator Light Source with Spectrum Adjustable Based on DMD

Authors:Xu, Da (1); Zhang, Guo-Yu (1, 2); Sun, Gao-Fei (1, 2); Zhang, Yu (3); Lei, Jie (3); Ma, Yi-Yuan (3)

Author affiliation:(1) School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun; 130022, China; (2) Jilin Engineering Research Center of Photoelectric Measurement &amp; Control Instruments, Changchun; 130022, China; (3) Key Laboratory of Space System Simulation, Beijing; 100000, China

Corresponding author:Zhang, Guo-Yu(zh_guoyu@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0722002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to satisfy the high precision calibration of the detection ability of star sensor in different spectrum distribution, a design method of star simulator light source system with spectrum adjustable based on digital micro-mirror device was presented, which could solve the issue of star sensor optical signal calibration precision caused by the mismatch between star simulator's color temperature and star sensor's detecting color temperature. Firstly, according to the design technical specification, the Czerny-Turner optical system was selected as the light source optical system, two main aberrations of Czerny-Turner system, coma and astigmatism, were analyzed, and a coma-corrected Czerny-Turner structure was adopted. Secondly, the initial structure parameters of Czerny-Turner optical system was calculated by MATLAB and then optimized by ZEMAX. Finally, the tolerance analysis of the optical system was carried out. The result shows that the spectral resolution is less than 2 nm within the working spectrum range from 400 nm to 1 100 nm, which meets the requirements, and effectively diminishes the calibration error caused by spectral mismatch. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Optical systems

Controlled terms:Adaptive optics - Calibration - Fits and tolerances - Light sources - Optical design - Simulators - Spectrum analysis - Stars

Uncontrolled terms:Aberration correction - Digital micro-mirror device - High-precision calibration - Spectrum distribution - Spectrum-matching - Star simulator - Technical specifications - Tolerance analysis

Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 741.1  Light/Optics - 741.3  Optical Devices and Systems

Numerical data indexing:Size 2.00e-09m, Size 4.00e-07m to 1.10e-06m

DOI:10.3788/gzxb20174607.0722002

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 9>

Accession number:20173204018694

Title:Ungsten Ore Primary Selection Based on Fuzzy Support Vector Machine and D-S Evidence Theory

Authors:Hu, Fa-Huan (1, 2); Liu, Guo-Ping (1); Hu, Rong-Hua (1); Dong, Zeng-Wen (1)

Author affiliation:(1) School of Mechanical &amp; Electrical Engineering, Nanchang University, Nanchang; 330031, China; (2) School of Mechanical &amp; Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou; Jiangxi; 341000, China

Corresponding author:Liu, Guo-Ping(liuguoping@vip.163com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0710003

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:According to the low accuracy and low stability of the single feature-based method for tungsten ore primary selection, a multi-feature fusion based on fuzzy support vector machine and D-S evidence theory was proposed. Firstly, the three types of vision feature that is color, gray and texture were extracted from the ore image after a series of image processing. Their probability function were acquired according to each type of feature utilizing fuzzy support vector machine and the results were used to D-S evidence theory as evidence. Finally, using D-S combination rule of evidence to achieve the decision fusion and giving final recognition result by classification rules. The experimental results show that the accuracy of multi-feature fusion methods is over 96% and it has good performance on accuracy and stability compared to the single feature-based method in tungsten ore primary selection. The accuracy and stability can meet the requirement of production process. &copy; 2017, Science Press. All right reserved.

Number of references:19

Main heading:Image processing

Controlled terms:Computer vision - Decision theory - Extraction - Feature extraction - Ore treatment - Ores - Support vector machines - Tungsten - Vectors

Uncontrolled terms:Classification rules - D S evidence theory - Decision fusion - Feature-based method - Fuzzy support vector machines - Multi-feature fusion - Probability functions - Production process

Classification code:533.1  Ore Treatment - 543.5  Tungsten and Alloys - 723  Computer Software, Data Handling and Applications - 723.5  Computer Applications - 802.3  Chemical Operations - 921.1  Algebra - 961  Systems Science

Numerical data indexing:Percentage 9.60e+01%

DOI:10.3788/gzxb20174607.0710003

Funding Details: Number; Acronym; Sponsor: 71361014; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 10>

Accession number:20173204018688

Title:Demodulation of Phase Shift Shadow Moir&eacute; Fringe Pattern by Orthonormalzing Method

Authors:Du, Hu-Bing (1); Yan, Jing-Jing (1)

Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Xi'an; 710021, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0712002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A self-calibration three-dimensional object surface measurement method with three image frames based on Gram-Schmidt orthonormalization method was proposed. The phase shift fringe map was obtained by translation grating, and the fringe background was eliminated by subtracting phase shift fringe maps with different frames. Then a phase demodulation method using Gram-Schmidt orthonormalization method and the least-square method was developed, so that the measurement phase can be extracted. Taking five steps Harlharan algorithm as a reference, the object surface was measured by different algorithms. The results show that compared with three steps phase shift algorithm and principal component analysis algorithm, the proposed method is more precise with phase error less than 0.5 rad and simplifies the mensuration. &copy; 2017, Science Press. All right reserved.

Number of references:15

Main heading:Least squares approximations

Controlled terms:Demodulation - Measurements - Optical devices - Optical variables measurement - Principal component analysis - Surface measurement

Uncontrolled terms:Least square methods - Measurement methods - Orthonormalization - Phase - Phase demodulation - Phase shift algorithms - Phase-shifting algorithm - Three-dimensional object

Classification code:741.3  Optical Devices and Systems - 921.6  Numerical Methods - 922.2  Mathematical Statistics - 941.4  Optical Variables Measurements - 943.2  Mechanical Variables Measurements

DOI:10.3788/gzxb20174607.0712002

Funding Details: Number; Acronym; Sponsor: 51475351; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61471288; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 11>

Accession number:20173204018673

Title:Measurement of Atmospheric Transmittance From Multi-Spectral Image

Authors:Zheng, Xin (1, 2); Wu, Peng-Fei (2); Miao, Xi-Kui (3); Rao, Rui-Zhong (1, 2)

Author affiliation:(1) Department of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei; 230022, China; (2) Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei; 230031, China; (3) Key Laboratory of Electro-Optical Countermeasures Test &amp; Evaluation Technology, Luoyang; Henan; 471003, China

Corresponding author:Wu, Peng-Fei(wupengfei@aiofm.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0701003

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A method of measuring atmospheric transmittance from a single frame of multi-spectral image for non and weak absorption waveband was proposed, which can be applied to evaluate and correct atmospheric attenuation effect in optoelectronics engineering field. Firstly, a radiometric image can be acquired using the camera with absolute radiometric calibration; secondly, according to the optical model of image degradation in atmosphere and the dark channel prior statistical theory, average atmospheric transmittance of dark channel can be calculated from radiometric image; finally, the atmospheric transmittance of specific wavelength is calculated using the average extinction coefficient relation database of the specific wavelength and the dark channel waveband. The experimental comparison indicates that the correlations between the transmittances measured by the new method, visibility meter and lidar are good. For the new method and visibility meter, the correlation coefficients are between 0.89 and 0.95, and the average relative deviations are no more than 9%, 15%, 30% for 1km, 4 km and 6 km, respectively; while for the new method and lidar, the correlation coefficients are between 0.95 and 0.97, and the average relative deviations are no more than 6%, 9%, 18% for 1 km, 4 km and 6 km, respectively. &copy; 2017, Science Press. All right reserved.

Number of references:14

Main heading:Optical radar

Controlled terms:Atmospheric optics - Atmospheric radiation - Radiometry - Spectroscopy - Visibility

Uncontrolled terms:Absolute-radiometric calibration - Atmospheric attenuation - Atmospheric transmittance - Correlation coefficient - Dark channel - Experimental comparison - Extinction coefficients - Multispectral images

Classification code:443.1  Atmospheric Properties - 741.2  Vision - 741.3  Optical Devices and Systems - 944.8  Radiation Measurements

Numerical data indexing:Percentage 1.50e+01%, Percentage 1.80e+01%, Percentage 3.00e+01%, Percentage 6.00e+00%, Percentage 9.00e+00%, Size 1.00e+03m, Size 4.00e+03m, Size 6.00e+03m

DOI:10.3788/gzxb20174607.0701003

Funding Details: Number; Acronym; Sponsor: 41505023; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 12>

Accession number:20173204018677

Title:Analysis of Performance of High Light-energy-utilization-ratio Laser Communication Antenna Based on Axicon Pair

Authors:Liu, Xian-Zhu (1, 2); Wang, Chao (1); Li, Ying-Chao (1); Jiang, Lun (1); Liu, Zhuang (1); Jiang, Hui-Lin (1); Yang, Jin-Hua (2)

Author affiliation:(1) Key Laboratory of Education Ministry Optoelectronics Measurement &amp; Control and Optical Information Transfer Technology, Changchun University of Science and Technology, Changchun; 130022, China; (2) College of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun; 130022, China

Corresponding author:Wang, Chao(nicklo19992009@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A scheme of coaxial reflective laser communication antenna added an axicon pair was proposed. This antenna could rearrange the light intensity distribution of the incident beam, leading to a great reduction of the energy loss caused by the central obscuration of the coaxial reflective structure and an increasing of the light-energy-utilization-ratio. Using the diffraction optical principle, the optical field distribution of the monochromatic Gaussian beam propagating to the antenna optical stop plane passed the axicon pair was analyzed and simulated, and the transmitting light energy utilization ratios of the ordinary coaxial reflective antenna and the high light-energy-utilization-ratio antenna in different incident beam waist and line obscuration ratios were compared. It was found that at the line obscuration ratio of 0.1 and 0.25, the light-energy-utilization-ratios of the high light-energy-utilization-ratio antenna were more than 99% and 96% through adjusting the incident beam waist diameter reasonably, which were much highest than that of the traditional coaxial reflective antenna. The far-field optical intensity of the light-energy-utilization-ratio antenna transmitting beam was analyzed, and the the light intensity in the receiving antenna aperture can be considered as a flat top distribution. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Light

Controlled terms:Antennas - Diffractive optics - Energy dissipation - Energy utilization - Gaussian beams - Optical links - Receiving antennas

Uncontrolled terms:Axicon - Communication antennas - High lights - Laser propagation - Light intensity distribution - Obscuration ratio - Optical field distribution - Reflective structure

Classification code:525.3  Energy Utilization - 525.4  Energy Losses (industrial and residential) - 711  Electromagnetic Waves - 717.1  Optical Communication Systems - 741.1  Light/Optics

Numerical data indexing:Percentage 9.60e+01%, Percentage 9.90e+01%

DOI:10.3788/gzxb20174607.0706002

Funding Details: Number; Acronym; Sponsor: 60907020; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 91338116; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 91438204; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 13>

Accession number:20173204018695

Title:Design and Implementation of Digital Slit-lamp Microscope Optical System

Authors:Sui, Cheng-Hua (1, 2, 3); Wo, Sheng-Jie (1, 2, 3); Gao, Nan (4); Xu, Dan-Yang (1, 2, 3); Han, Yong-Hao (1, 2, 3); Du, Chun-Nian (1, 2, 3)

Author affiliation:(1) Center for Optics &amp; Optoelectronics Research (COOR), Zhejiang University of Technology, Hangzhou; 310023, China; (2) Collaborative Innovation Center for Information Technology in Biological and Medical Physics, Zhejiang University of Technology, Hangzhou; 310023, China; (3) College of Science, Zhejiang University of Technology, Hangzhou; 310023, China; (4) College of Computer, Zhejiang University of Technology, Hangzhou; 310023, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0722001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A set of 6&times;, 10&times;, 16&times;, 25&times; and 40&times; magnifications of digital slit-lamp microscope optical system is designed with Zemax. The optical system structure of traditional stereo slit-lamp microscope is analyzed, on its basis, the digital slit-lamp is divided into shared front-objective, Galileo telescope and photographic lens, using parallel Galileo telescope system structure to change rate. The optical properties and the technical indicators of shared front-objective, Galileo telescope and photographic lens are discussed, and the appropriate type of the lens is selected. Under the good imaging quality foundation in coaxial situation, the optical system is carried out the transition to non-coaxial and optimized. The modulation transfer function curve values are mainly greater than 0.2 at the position of 115 lp/mm in 6&times;, 10&times;, 16&times;, 25&times; except the low diffraction limit at 40&times;, and the spot diagram shows that the spot size in different magnifications are substantially less than the Airy disk. The lens has a good imaging effect with simple structure, easy processing and low cost. &copy; 2017, Science Press. All right reserved.

Number of references:12

Main heading:Optical systems

Controlled terms:Camera lenses - Cameras - Diffraction - Lenses - Microscopes - Optical design - Optical properties - Optical telescopes - Stereo image processing - Structured programming

Uncontrolled terms:Design and implementations - Diffraction limits - Imaging effects - Shared front-objective - Simple structures - System structures - Technical indicator - Telescope system

Classification code:723.1  Computer Programming - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment

DOI:10.3788/gzxb20174607.0722001

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 14>

Accession number:20173204018680

Title:Research and Design of All-solid Dual-concentric-core Photonic Crystal Fiber for Dispersion Compensation

Authors:Qu, Yu-Wei (1, 2); Zhang, Chun-Lan (1, 2); Guo, Chang-Jiang (1, 2); Zhang, Sen (1); Han, Ying (1, 2); Zhao, Xing-Tao (1, 2); Hou, Lan-Tian (1, 2); Wang, Wei (1, 2)

Author affiliation:(1) School of Information Science and Engineering, Yanshan University, Qinhuangdao; Hebei; 066004, China; (2) The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Qinhuangdao; Hebei; 066004, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706005

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to compensate the transmission limits of the high-speed signal caused by dispersion of the fiber, an all-solid dual-concentric-core photonic crystal fiber for dispersion compensation was proposed. Firstly, the mode coupling characteristics of the fiber was theoretically analyzed, and then multipole method was used to calculate the relationship between the parameters of the fiber and the dispersion value as well as the shift of phase matching wavelength, and the regularity was studied. Finally a dispersion compensating fiber with dispersion value of -32 620 ps/(nm&middot;km) at 1 550 nm was achieved by optimizing the structural parameters of fiber, and numerical results also show that the loss is 0.29 dB/km and the splicing loss with SMF-28 fiber is 4.77 dB at 1 550 nm. The fiber can compensate 1 910 times the length of the SMF-28 single-mode fiber dispersion, its compensation ability is much larger than the conventional dispersion compensation fiber. The all-solid dispersion compensating photonic crystal fiber has the advantages of easy to fabricate and easy to splice with the traditional communication fiber compared with air-silica photonic crystal fiber. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Photonic crystal fibers

Controlled terms:Crystal whiskers - Dispersion (waves) - Dispersion compensation - Dispersions - Fiber optics - Fibers - Nonlinear optics - Phase matching - Single mode fibers

Uncontrolled terms:All-solid dual-concentric-core - Dispersion compensating fibers - Dispersion-compensation fibers - High-speed signals - Mode coupling - Multipole methods - Structural parameter - Transmission limits

Classification code:713  Electronic Circuits - 741.1.1  Nonlinear Optics - 741.1.2  Fiber Optics - 933.1.1  Crystal Lattice - 951  Materials Science

Numerical data indexing:Decibel 4.77e+00dB, Size 1.55e-06m

DOI:10.3788/gzxb20174607.0706005

Funding Details: Number; Acronym; Sponsor: 61405172; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61405173; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 15>

Accession number:20173204018693

Title:Medical Spine Denoising Model Based on Bilateral Filter Operator

Authors:Hui, Yu (1); Wu, Jun-Sheng (2); Yu, Bin (3); Du, Jing (4); Li, Hang (5)

Author affiliation:(1) College of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China; (2) College of Software and Microelectronics, Northwestern Polytechnical University, Xi'an; 710072, China; (3) College of Computer Science, Xidian University, Xi'an; 710072, China; (4) School of Management, Northwestern Polytechnical University, Xi'an; 710072, China; (5) Fast Group Xianyang Precision Machinery Branch, Xianyang; Shaanxi; 712046, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0710002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to filter out the noise points of the spine 3D model effectively, a denoising and spreading method for spine 3D model based on bilateral filter operator was proposed.The bilateral filter operator is used to extract the contours of the 3D model, design and improve the adaptive diffusion coefficient, in order to better optimize the control of the entire diffusion process. The discrete iterative equation is established and the iterative stop criterion is designed so that the iteration is stopped when the de-noising effect is optimal. Compared with classical methods such as approximate diffusion model method, the proposed method achieves good filtering effect in solving the denoising method, which is much better than the traditional filtering algorithm. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Iterative methods

Controlled terms:Bandpass filters - Diffusion - Nonlinear filtering

Uncontrolled terms:3-d modeling - Adaptive - Bilateral filters - De-noising - Feature preserving

Classification code:703.2  Electric Filters - 716.1  Information Theory and Signal Processing - 921.6  Numerical Methods

DOI:10.3788/gzxb20174607.0710002

Funding Details: Number; Acronym; Sponsor: 61172147; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 16>

Accession number:20173204018686

Title:Impact of Lateral Leakage Loss in a Kind of Shallowly-etched Rib Waveguides on SOI with Non-rectangular Cross-section

Authors:Zhang, Ming (1); Tao, Jing (1); Zhou, Han-Qing (1); Wang, Chang-Hui (1)

Author affiliation:(1) College of Science, Zhejiang University of Technology, Hangzhou; 310023, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0723003

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to further investigate the lateral leakage loss behavior of shallowly-etched rib waveguides on silicon-on-insulator, a kind of shallowly-etched rib waveguide with non-rectangular crosssection was proposed and analyzed. A periodical loss model and a formula of loss period of this waveguide were obtained by the interference theory, and then phenomena of periodic variation of lateral leakage loss and shift of the maximum loss point for TM<inf>0</inf>-like mode were observed through the finite element method simulation in frequency domain with perfectly-matched layerconditions. The period in simulation results are highly consistent with theoretical calculation, and the average relative error is only 0.56%.In addition, it is found that TM<inf>0</inf>mode loss can be adjusted from maximum to minimum by changing the cross section of rib waveguides with some trench widths, while TM<inf>0</inf>mode loss is not sensitive to the change of cross section in rib waveguide with other trench widths. These findings can simplify process and improve fabrication tolerance, which provide theoretical guidance for the design and fabrication of this kind of waveguide. &copy; 2017, Science Press. All right reserved.

Number of references:15

Main heading:Ridge waveguides

Controlled terms:Electric losses - Finite element method - Frequency domain analysis - Optical losses - Silicon on insulator technology - Waveguides

Uncontrolled terms:Average relative error - Fabrication tolerances - Finite element method simulation - Interference theory - Leaky waves - Periodic variation - Rectangular cross-sections - Theoretical calculations

Classification code:714.2  Semiconductor Devices and Integrated Circuits - 714.3  Waveguides - 741  Light, Optics and Optical Devices - 921.3  Mathematical Transformations - 921.6  Numerical Methods

Numerical data indexing:Percentage 5.60e-01%

DOI:10.3788/gzxb20174607.0723003

Funding Details: Number; Sponsor: LY16F050008; Natural Science Foundation of Zhejiang Province

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 17>

Accession number:20173204018699

Title:Analysis and Verification of Eliminating Glare Based on Fresnel Polarization Reflection Theory

Authors:Wang, Qi (1); Lei, Liang (1); Tan, Ji (1); Lai, Jing-Xiang (1); Chen, Jian-Biao (1); Ruan, Yang (1); Zhou, Jin-Yun (1)

Author affiliation:(1) Institute of Photoelectric Visual Inspection, School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou; 510006, China

Corresponding author:Lei, Liang(leiliang@gdut.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0715002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Based on the theory of the Fresnel polarization reflectance, the polarization factor was put forward by decomposing the incident light into electric vector, which could affect the intensity of glare and play a leading role during eliminating glare. According to the imaging detection model, the displacement factor was presented, which could change the glare position and the size of the glare area, and play a supplementary role during eliminating glare. The image gray-scale transformation curves under different polarizations and different positions were gained by sampling and contrasting the image datas of a certain object, and these image data were measured in the equivalent environment while different situations. The proposed theory was verified by analysing the relationship of gray-scale transformation curve with polarization and position. The results show that the essence of glare eliminating is reducing the light intensity and contrast between with the glare area and neighborhood region. Furthermore, the joint mobilization of the displacement factor and polarization factor can almost eliminate the glare completely completely. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Glare

Controlled terms:Computer vision - Metadata - Optical engineering - Polarization

Uncontrolled terms:Analysis and verifications - Electric vectors - Fresnel formula - Imaging detections - Light intensity - Polarization factor - Polarization reflectance - Reflection theory

Classification code:723.5  Computer Applications

DOI:10.3788/gzxb20174607.0715002

Funding Details: Number; Acronym; Sponsor: 61675050; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 18>

Accession number:20173204018689

Title:Research on Laser Detection Method of Rotor Chord Based on Micro-Doppler Effect

Authors:Wang, Yun-Peng (1); Hu, Yi-Hua (1); Guo, Li-Ren (1); Xu, Shi-Long (1)

Author affiliation:(1) State Key Laboratory of Pulsed Power Laser Technology, Electronic Engineering Institute, Hefei; 230037, China

Corresponding author:Hu, Yi-Hua(skl_hyh@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0712003

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to detect and recognize rotors based on laser micro-doppler effect, the modulation of laser echo by rotating area rotor is studied. Micro-doppler echo model of rectangular area rotor is built using the physical optics method of scattering echo superposition. Simulation of laser echo based on this model is completed and the micro-doppler feature different from line target rotor is extracted using time-frequency analysis method. Mechanism analysis confirms that the feature contains lateral size information of rotor. This paper proposes a method to calculate the chord of rectangular rotor through laser echo and verifies this method to be effective through rotor echo simulation of various aspect ratio. Error analysis shows that using the method of changing the window size of short-time Fourier transform (STFT) to extract time and frequency information respectively can reduce the chord length calculation error to 1.58% compared to single size. This model can realize the calculation of aircraft rotor chord size, providing an important reference for the research of rotor identification. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Frequency estimation

Controlled terms:Aspect ratio - Doppler effect - Physical optics

Uncontrolled terms:Laser detection - Mechanism analysis - Micro-Doppler effect - Physical optics method - Short time Fourier transforms - Time and frequencies - Time frequency analysis - Time-frequency analysis methods

Classification code:741.1  Light/Optics

Numerical data indexing:Percentage 1.58e+00%

DOI:10.3788/gzxb20174607.0712003

Funding Details: Number; Acronym; Sponsor: 61271353; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 19>

Accession number:20173204018692

Title:Curvature Filter and Gradient Transform Based Image Enhancement

Authors:Cheng, Kuan-Hong (1); Zhou, Hui-Xin (1); Qin, Han-Lin (1); Yin, Shi-Min (2); Qian, Kun (1); Zhao, Dong (1); Rong, Sheng-Hui (1)

Author affiliation:(1) School of Physics and Optoeletronic Engineering, Xidian University, Xi'an; 710071, China; (2) School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin; Guangxi; 541004, China

Corresponding author:Zhou, Hui-Xin(hxzhou@xidian.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0710001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:For the noise amplification problem during gradient transform based image enhancement, an improved algorithm combined with Gaussian curvature filter was proposed. First, the nonlinear gradient transformation is utilized for image gradient field to enhance the contrast. Then the enhanced image is reconstructed by minimizing an energy functional through gradient descent method. During iteration of gradient descent, the reconstructed image and its first and second derivatives are smoothed by Gaussian curvature filter, which can solve the promblems of nonlinear amplification and diffusion of noise in image reconstruction and preserve details. The experimental results with various images show the proposed algorithm can effectively suppress noises and enhance the image edges contrast at the same time. &copy; 2017, Science Press. All right reserved.

Number of references:13

Main heading:Image reconstruction

Controlled terms:Bandpass filters - Edge detection - Gaussian distribution - Image enhancement - Image processing - Iterative methods - Mathematical transformations - Variational techniques

Uncontrolled terms:Gaussian curvatures - Gradient Descent method - Image filtering - Noise amplification - Noise suppression - Nonlinear amplification - Nonlinear transfer functions - Reconstructed image

Classification code:703.2  Electric Filters - 921  Mathematics - 922.1  Probability Theory

DOI:10.3788/gzxb20174607.0710001

Funding Details: Number; Acronym; Sponsor: 61401343; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61675160; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 20>

Accession number:20173204018698

Title:Underwater Dense Stereo Matching Based on Depth Constraint

Authors:Li, Ya-Qian (1); Zhang, Yan-Song (1); Li, Hai-Bin (1); Zhang, Wen-Ming (1); Jia, Lu (1)

Author affiliation:(1) Key Lab of Industrial Computer Control Engineering of Hebei Province, Yanshan University, Qinhuangdao; Hebei; 066004, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0715001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to solve the problem that stereo matching of binocular underwater image could not meet conventional epipolar constraint in the air, a semi-global algorithm for dense stereo matching of underwater image based on depth constraint was proposed. Firstly, a depth constraint was used to determine the searching area during stereo matching; based on depth constraint area, the absolute difference function and gradient calculation were extended to two dimensional directions and then fused by weighted factor. During candidate searching in the depth constraint area, the winner-takes-all was adopted to get the best line aberration under each disparity and their corresponding cost values, these cost values were regarded as data item of semi-global algorithm and an initial disparity map was obtained. Finally the sub-pixel dense disparity map was obtained by parabolic fit. Experiments were performed on underwater image to obtain dense disparity map, the results show that compare with other semi-global algorithms, the proposed algorithm could greatly accelerate underwater stereo matching and improve accuracy of matching. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Stereo image processing

Controlled terms:Computer vision - Stereo vision - Underwater imaging

Uncontrolled terms:Dense disparity - Depth constraints - Epipolar - Semi-global - Underwater stereo

Classification code:723.2  Data Processing and Image Processing - 723.5  Computer Applications - 746  Imaging Techniques

DOI:10.3788/gzxb20174607.0715001

Funding Details: Number; Sponsor: D2014203153; Natural Science Foundation of Hebei Province - Number; Sponsor: F2015203212; Natural Science Foundation of Hebei Province

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 21>

Accession number:20173204018678

Title:Analysis of the Pound-Drever-Hall Frequency Stabilization Technique Based on a Whispering Gallery Mode Optical Microsphere Cavity

Authors:Wang, Meng-Yu (1); Jin, Xue-Ying (1); Wang, Jing (1); Chen, Li-Ming (1); Wang, Ke-Yi (1)

Author affiliation:(1) Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei; 230026, China

Corresponding author:Wang, Ke-Yi(kywang@ustc.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706003

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Optical microsphere (OM) cavities supporting Whispering Gallery Modes (WGMs) have received much attention because of their high quality factor (Q). The study analyzes the Fabry-Perot (FP) cavity and OM cavity theories. An OM cavity with diameter of 1.2 mm was produced by melting a silica optical fiber using a CO<inf>2</inf>laser, and the coupling structure for OM cavity and tapered fiber was tested. We designed an OM cavity frequency stabilization system based on basic PDH frequency stabilization system. Absorption and dispersion characteristics of error signal curves used to be frequency discrimination curves were analyzed. We compared the relationships between error signal slopes and different modulation frequency, OM cavity's diameter, coupling loss, transmission loss. The results show that the maximum Q factor of OM cavity coupled by the tapered fiber is 1.1&times;10<sup>8</sup>. Transverse electric (TE) mode and transverse magnetic (TM) mode can be transformed to optimize coupling efficiency. The transmission spectrum of the second radial mode was obtained by matching dimensions between OM cavity and tapered fiber. The slope of the error signal is 15.4 A mW/MHz. Our work shows its potential to improve the sensitivity of the PDH technique. &copy; 2017, Science Press. All right reserved.

Number of references:20

Main heading:Whispering gallery modes

Controlled terms:Carbon dioxide lasers - Errors - Fabry-Perot interferometers - Fiber optics - Fibers - Frequency stability - Microspheres - Optical fiber coupling - Optical fibers - Optical resonators  - Q factor measurement - Stabilization

Uncontrolled terms:Dispersion characteristics - Frequency discrimination - Frequency stabilization - Laser frequency stabilization - Modulation frequencies - Optical microspheres - Transverse electric modes - Transverse magnetic modes

Classification code:714.3  Waveguides - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.2  Gas Lasers - 941.3  Optical Instruments - 942.2  Electric Variables Measurements - 961  Systems Science

Numerical data indexing:Size 1.20e-03m

DOI:10.3788/gzxb20174607.0706003

Funding Details: Number; Acronym; Sponsor: 61275011; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 22>

Accession number:20173204018690

Title:Quantum Levitation Effect in Sandwich Structure Containing Dispersive Metamaterial Slab

Authors:Zeng, Ran (1, 2); Guo, Jun (1); Li, Qi-Liang (1); Bi, Mei-Hua (1); Yang, Guo-Wei (1); Yang, Ya-Ping (2)

Author affiliation:(1) School of Communication Engineering, Hangzhou Dianzi University, Hangzhou; 310018, China; (2) MOE Key Laboratory of Advanced Micro-Structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai; 200092, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0727001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:The Casimir interaction of a sandwich structure was investigated, where the structure was formed by means of inserting a dispersive metamaterial slab between the metal slab and the dielectric substrate. Based on Casimir-Liftshitz theory, the radiation pressure of the vacuum fluctuation was calculated by the Maxwell tensor method, and the situation for the sandwich structure was numerically calculated and analyzed by the method of transfer matrix of the electromagnetic mode. The calculation results show that the Casimir force for two-slab structure may turn into repulsion for the sandwich structure by means of inserting a metamaterial slab to the previous bi-layer structure, therefore the thin metal slab can be levitated by the repulsive Casimir force. The influences of the metamaterial dispersive electromagnetic response properties and the dielectric substrate were discussed. It is seen that when the larger magnetic plasma frequency of the metamaterial, the smaller magnetic resonance frequency and the smaller dielectric constant of the dielectric substrate are taken, the greater repulsion force can be obtained in the sandwich structure. In addition, it is found that when the slab distance is increased to a certain extent, the restoring Casimir force can be obtained in the sandwich structure. For the formation of restoring force, it shows that when the smaller filling factor of the metamaterial, the larger layer separation and larger layer thickness are adopted, the restoring force in the sandwich structure will appear at farther slab separation position. The quantum levitation and the restoring force may guarantee the stability of the micro- and nano-electromechanical system devices, and show the new application prospect based on the radiation pressure of vacuum fluctuation. &copy; 2017, Science Press. All right reserved.

Number of references:22

Main heading:Quantum theory

Controlled terms:Dielectric materials - Electromechanical devices - Magnetic resonance - Magnetoplasma - Metamaterials - NEMS - Pressure - Sandwich structures - Transfer matrix method

Uncontrolled terms:Casimir effects - Electromagnetic modes - Electromagnetic response - Magnetic resonance frequencies - Maxwell tensor methods - Nano electromechanical systems - Quantum levitation - Vacuum fluctuations

Classification code:701.2  Magnetism: Basic Concepts and Phenomena - 708.1  Dielectric Materials - 761  Nanotechnology - 921  Mathematics - 931.1  Mechanics - 931.4  Quantum Theory; Quantum Mechanics - 933  Solid State Physics - 951  Materials Science

DOI:10.3788/gzxb20174607.0727001

Funding Details: Number; Acronym; Sponsor: 11574068; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61405051; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61501157; NSFC; National Natural Science Foundation of China - Number; Sponsor: LY14A040008; Natural Science Foundation of Zhejiang Province

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 23>

Accession number:20173204018675

Title:Performance Analysis of Free Space Quantum Key Distribution Based on Refraction of Turbulence Bubble

Authors:Xue, Yang (1); Ma, Li-Hua (1); Shi, Lei (1); Luo, Jun-Wen (1); Xu, Zhi-Yan (1); Li, Na (1); Ji, Yi-Ming (2)

Author affiliation:(1) Information and Navigation College, Air Force Engineering University, Xi'an; 710072, China; (2) Air Force Communication Sergeant School, Dalian; Liaoning; 116600, China

Corresponding author:Ma, Li-Hua(hua_marry@sohu.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0701005

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to analyze the influence of atmospheric turbulence on the performance of free space Quantum Key Distribution (QKD), the turbulence is modeled as randomly distributed atmospheric bubbles so as to conceive the propagation process of single photon using geometric optics. The fluctuation of photon transmission ratio k and Quantum Bit Error Rate (QBER) E<inf>p</inf>has been quantitatively calculated, which both are caused by the change of polarization state after continuous refractions. Then the trends of these two values are simulated with random turbulence refractive index using Monte-Carlo method. Furthermore, the key generation rate of decoy state free space QKD has been derived under turbulence situation. The upper bound of k is achieved through analyzing the source of QBER and the relationship between E<inf>p</inf>and incident angle and turbulence refractive index is established which defines the secure threshold of E<inf>p</inf>. Simulation results show that when incident angle is between 44.8&deg; and 76.5&deg; while the refractive index falls within 1~1.33 will meet the required upper bound of E<inf>p</inf>, which provides theoretical reference to quantum communication in turbulence scenario. &copy; 2017, Science Press. All right reserved.

Number of references:23

Main heading:Quantum cryptography

Controlled terms:Atmospheric thermodynamics - Atmospheric turbulence - Bit error rate - Monte Carlo methods - Optical communication - Particle beams - Photons - Polarization - Quantum communication - Quantum theory  - Refraction - Refractive index

Uncontrolled terms:Bubble models - Decoy state - Error rate - Free spaces - Polarization state

Classification code:443.1  Atmospheric Properties - 716  Telecommunication; Radar, Radio and Television - 717.1  Optical Communication Systems - 723.1  Computer Programming - 741.1  Light/Optics - 922.2  Mathematical Statistics - 931.3  Atomic and Molecular Physics - 931.4  Quantum Theory; Quantum Mechanics - 932.1  High Energy Physics

DOI:10.3788/gzxb20174607.0701005

Funding Details: Number; Acronym; Sponsor: 61168068; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 24>

Accession number:20173204018684

Title:Polarization Splitter Based on Dual-Core Photonic Crystal Fibers Filled with Gold Wire

Authors:Bai, Yu-Kun (1, 2); Wang, Biao (1)

Author affiliation:(1) Engineering Research Center of Communication Devices and Technology, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin; 300384, China; (2) Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education, and Center for Terahertz Waves, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0723001

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:An ultra-short polarization splitter based on dual-core Photonic Crystal Fiber (PCF) with a gold wire filled into the air hole between the two cores has been proposed and analyzed with the finite element method. Surface Plasmon Polaritons (SPPs) excited on the surface of gold wire have strong resonant coupling with the guided core modes of PCF, which enables a short polarization-splitting length and broadband operation. Compared to its counterparts, the proposed polarization splitter exhibits a shorter length and higher Extinction Ratio (ER), simultaneously. Numerical results indicate that the 0.263 mm long polarization splitter can achieve an ER of -70 dB at the wavelength of 1.55 &mu;m with -20 dB-ER bandwidth of 124 nm. &copy; 2017, Science Press. All right reserved.

Number of references:23

Main heading:Photonic crystal fibers

Controlled terms:Crystal whiskers - Electromagnetic wave polarization - Finite element method - Gold - Holey fibers - Light extinction - Nonlinear optics - Phonons - Photons - Plasmons  - Polarization - Quantum theory - Surface plasmon resonance - Wire

Uncontrolled terms:Dual core photonic crystal fiber - Extinction ratios - Gold wire - Polarization splitters - Surface plasmon polaritons

Classification code:535.2  Metal Forming - 547.1  Precious Metals - 711  Electromagnetic Waves - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 921.6  Numerical Methods - 931.3  Atomic and Molecular Physics - 931.4  Quantum Theory; Quantum Mechanics - 933.1.1  Crystal Lattice - 951  Materials Science

Numerical data indexing:Decibel -7.00e+01dB, Size 1.24e-07m, Size 1.55e-06m, Size 2.63e-04m

DOI:10.3788/gzxb20174607.0723001

Funding Details: Number; Acronym; Sponsor: 11004152; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 25>

Accession number:20173204018683

Title:Coexistence of Quantum-classical Signals Based on Single-mode Operation in Few-mode Fiber

Authors:Luo, Jun-Wen (1); Li, Yun-Xia (1); Shi, Lei (1); Wei, Jia-Hua (1); Xue, Yang (1); Ji, Yi-Ming (1)

Author affiliation:(1) Information and Navigation College, Air Force Engineering University, Xi'an; 710077, China

Corresponding author:Li, Yun-Xia(yunxial@sohu.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706008

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In consideration of low nonlinearity and maintaining of loss and dispersion when few-mode fiber is operated in single mode, the coexistence scheme of quantum-classical signals based on few-mode fiber operated in single mode was put forward. The coexistence model of quantum-classical signals based on few-mode fiber operated in single mode was built by Optisystem. The transmission performance of the model was analysed and compared with the existing model based on single-mode fiber. The result shows that the nonlinearity and signal crosstalk in existing model have been reduced efficiently in the proposed model. The bit error rate is two orders of magnitude lower than existing model and the transmission quality is improved obviously. It is suitable to apply the proposed model to massive network realization of quantum private communication. &copy; 2017, Science Press. All right reserved.

Number of references:15

Main heading:Quantum communication

Controlled terms:Bit error rate - Fibers - Optical communication - Single mode fibers - Wavelength division multiplexing

Uncontrolled terms:Few-mode fibers - Fiber communications - Orders of magnitude - Private communication - Quantum-classical - Single mode operation - Transmission performance - Transmission quality

Classification code:716  Telecommunication; Radar, Radio and Television - 717.1  Optical Communication Systems - 723.1  Computer Programming - 741.1.2  Fiber Optics

DOI:10.3788/gzxb20174607.0706008

Funding Details: Number; Acronym; Sponsor: 61601497; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 26>

Accession number:20173204018676

Title:Fabrication of Bragg Gratings in Low-loss As<inf>2</inf>S<inf>3</inf>Chalcogenide Fibers Using +1/-1 Phase Mask and 532 nm Laser

Authors:Zou, Lin-Er (1); He, Pan-Pan (1); Fu, Ji-Wu (1); Chen, Bao-Xue (2)

Author affiliation:(1) Department of Physics, Nanchang University, Nanchang; 330031, China; (2) School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai; 200093, China

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Adopting modified Sagnac interference grating writing system, the fiber Bragg gratings were written in two kinds of As<inf>2</inf>S<inf>3</inf>chalcogenide fibers with different cladding diameter by use of a near bandgap light at 532 nm and +1/-1 diffracted orders phase mask, and the gratings dynamic characteristics during the exposure were studied. It is found that the depth of grating transmission peak in low-loss As<inf>2</inf>S<inf>3</inf>chalcogenide fiber increases with a decrease of the cladding diameter. During exposure, the Bragg wavelength shifts fast towards short wavelength at first, and then with increasing exposure time restores slowly towards long wavelength. At exposure time from 800 s to 1000 s, the good quality Bragg grating with about -2.6 dB bandgap and about 0.37 nm bandwidth in transmission spectra was fabricated in As<inf>2</inf>S<inf>3</inf>chalcogenide fiber with about 140 &mu;m cladding diameter. In addition, an analysis of photosensitivity in the As<inf>2</inf>S<inf>3</inf>chalcogenide fiber core shows that the refractive index modulation amplitude and the change of average refractive index with the exposure time can achieve to be on the order of 10<sup>-4</sup>and 10<sup>-3</sup>, respectively. &copy; 2017, Science Press. All right reserved.

Number of references:23

Main heading:Refractive index

Controlled terms:Bragg gratings - Chalcogenides - Energy gap - Fiber Bragg gratings - Fibers - Integrated optics - Light sensitive materials - Optical fibers - Photosensitivity

Uncontrolled terms:Bragg wavelength shift - Chalcogenide fibers - Chalcogenide glass - Cladding diameters - Dynamic characteristics - Interference grating - Refractive index modulation - Transmission spectrums

Classification code:741  Light, Optics and Optical Devices - 804.2  Inorganic Compounds

Numerical data indexing:Decibel -2.60e+00dB, Size 1.40e-04m, Size 3.70e-10m, Size 5.32e-07m

DOI:10.3788/gzxb20174607.0706001

Funding Details: Number; Acronym; Sponsor: 61077042; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 61465008; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 27>

Accession number:20173204018682

Title:Dual-core Photonic Crystal Fiber for Hydrostatic Pressure Sensing

Authors:Li, Hai-Tao (1); Wang, Xiao-Liang (1); She, Li-Juan (1); Chen, Da-Ru (1)

Author affiliation:(1) Institute of Optical Information, College of Mathematics and Information Engineering, Zhejiang Normal University, Jinhua; Zhejiang; 321004, China

Corresponding author:Chen, Da-Ru(daru@zjnu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0706007

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:By a full-vector finite-element method, the dual-core photonic crystal fiber for hydrostatic pressure sensing with two layers of air holes in the cross-section missed was designed and optimized, The mode field radius and numerical aperture of the optimized dual-core photonic crystal fiber are almost the same as that of the single mode fiber, which contributes to a relatively low splicing loss between the optimized dual-core photonic crystal fiber and the single mode fiber. The calculations results show that the total loss induced by the similar mode field radius and numerical aperture is as low as about 0.026 dB, less than that between the traditional photonic crystal fiber and single mode fiber of 0.1 dB. The performance of the hydrostatic pressure sensor based on the optimized dual-core photonic crystal fiber with a length of 20 cm was studied, and the results show the sensitivity is about -1.6 pm/MPa in the range from 0 to 500 MPa. &copy; 2017, Science Press. All right reserved.

Number of references:27

Main heading:Photonic crystal fibers

Controlled terms:Crystal whiskers - Fiber optics - Fibers - Finite element method - Holey fibers - Hydraulics - Hydrostatic pressure - Numerical methods - Photonic crystals - Pressure sensors  - Single mode fibers

Uncontrolled terms:Air holes - Dual core photonic crystal fiber - Full vector finite element methods - Mode fields - Numerical aperture - Splicing loss - Total loss

Classification code:631.1.1  Liquid Dynamics - 632.1  Hydraulics - 741.1.2  Fiber Optics - 921.6  Numerical Methods - 933.1.1  Crystal Lattice - 944.3  Pressure Measuring Instruments

Numerical data indexing:Decibel 1.00e-01dB, Decibel 2.60e-02dB, Pressure 0.00e+00Pa to 5.00e+08Pa, Size 2.00e-01m

DOI:10.3788/gzxb20174607.0706007

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 28>

Accession number:20173204018674

Title:Mobile SO<inf>2</inf>Differential Absorption Lidar System

Authors:Chen, Ya-Feng (1, 2); Wang, Xiao-Bin (1, 2); Liu, Qiu-Wu (1, 2); Cao, Kai-Fa (1); Hu, Shun-Xing (1); Huang, Jian (1)

Author affiliation:(1) Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei; 230031, China; (2) University of Science and Technology of China, Hefei; 230026, China

Corresponding author:Hu, Shun-Xing(sxhu@aiofm.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0701004

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A mobile lidar system was developed which can be used to measure the lower layer atmospheric SO<inf>2</inf>. The lasers with wavelength of 300.05 nm and 301.50 nm are adopted in this system. The laser beams, produced by two narrow linewidth dye lasers pumped by two Nd:YAG lasers, are frequency doubled by second harmonic generation crystals. They are merged, expanded and transmitted into the atmosphere coaxially with telescope. The back scattering signals are received by the Newton telescope and converted into electrical signals by photomultiplier. The data are obtained by A/D acquisition card and used to estimate the profile of sulfur dioxide. The horizontal detection were field experimented in Huainan, the results show that the mean concentration of atmospheric SO<inf>2</inf>is about 20 &mu;g&middot;m<sup>-3</sup>in the range from 0.8 km to 3.0 km. It conforms with the results of ground instrument from meteorological department whose results is about 18-22 &mu;g&middot;m<sup>-3</sup>. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Optical radar

Controlled terms:Atmospheric optics - Backscattering - Dye lasers - Laser beams - Neodymium lasers - Nonlinear optics - Pumping (laser) - Remote sensing - Sulfur dioxide - Telescopes

Uncontrolled terms:Absorption cross sections - Differential absorption lidars - Differential-absorption lidar systems - Electrical signal - Mean concentrations - Mobile lidar system - Narrow-line width - Optical remote sensing

Classification code:741  Light, Optics and Optical Devices - 744  Lasers - 804.2  Inorganic Compounds

Numerical data indexing:Size 3.00e-07m, Size 3.01e-07m, Size 8.00e+02m to 3.00e+03m

DOI:10.3788/gzxb20174607.0701004

Funding Details: Number; Acronym; Sponsor: 41127901; NSFC; National Natural Science Foundation of China - Number; Acronym; Sponsor: 41505019; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 29>

Accession number:20173204018672

Title:Influence of Different Mixing Patterns of Haze Particles and Water Cloud Particles on the Performance of Quantum Satellite Communication

Authors:Nie, Min (1); Chang, Le (1); Yang, Guang (1, 2); Zang, Mei-Ling (1); Pei, Chang-Xing (3)

Author affiliation:(1) School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) School of Electronics and Information, Northwestern Polytechnical University, Xi'an; 710072, China; (3) State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an; 710071, China

Corresponding author:Chang, Le(515545055@qq.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0701002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to analyze the influence of different mixing patterns of mixed particles on the quantum satellite communication, according to the spectral distribution function of hazeparticles and water-cloud particles and the extinction factor in different mixing patterns, the attenuation relationship of the quantum satellite communication channel in external mixing mode was proposed, and the Core-shell channel attenuation model was established. Thus the quantitative relation among the volume ratio of the mixed particles, fidelity of quantum communication and channel bit error rate were analyzed and simulated. The simulation results show that, when the volume ratio of mixing particles is 0.2 (0.8), the channel capacity, channel average fidelity and the channel bit error rate of external mixing mode will be 0.39 (0.27), 0.8 (0.8) and 0.003 (0.009), respectively; the channel capacity, channel average fidelity and the channel bit error rate of external mixing mode will be 0.8 (0.21), 0.94 (0.81) and 0.018 (0.021), respectively. It can be seen that the influence of different mixing modes of haze aerosol and water cloud particles on the communication performance of quantum satellite is different. Therefore, the parameters of the communication system should be adjusted adaptively based on the different mixing patterns to improve the reliability of the quantum satellite communication. &copy; 2017, Science Press. All right reserved.

Number of references:22

Main heading:Bit error rate

Controlled terms:Aerosols - Channel capacity - Distribution functions - Errors - Mixing - Quantum communication - Satellite communication systems - Satellites - Shells (structures) - Volume fraction

Uncontrolled terms:Aerosol particles - Attenuation relationships - Channel attenuation - Communication performance - Fidelity - Quantitative relations - Satellite communications - Spectral distribution functions

Classification code:408.2  Structural Members and Shapes - 641.1  Thermodynamics - 655.2  Satellites - 655.2.1  Communication Satellites - 716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 723.1  Computer Programming - 802.3  Chemical Operations - 922.1  Probability Theory

DOI:10.3788/gzxb20174607.0701002

Funding Details: Number; Acronym; Sponsor: 61172071; NSFC; National Natural Science Foundation of China

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 30>

Accession number:20173204018685

Title:Gain-flattened Photonic Crystal Raman Fiber Amplifier

Authors:Gong, Jia-Min (1); Guo, Cui (1); Shen, Yi-Nan (1); Liu, Jian-Hua (1); Meng, Ling-He (1); Yang, Meng (1)

Author affiliation:(1) School of Electronics Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China

Corresponding author:Guo, Cui(guocui613@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:46

Issue:7

Issue date:July 1, 2017

Publication year:2017

Article number:0723002

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A gain-flattened Raman fiber amplifier was proposed by using the method of cascading photonic crystal fiber, which improves the Raman gain coefficient and reduces the gain flatness of the traditional Raman fiber amplifier. Based on steady-state analysis theory of the stimulated Raman scattering effect, the photonic crystal fiber Raman gain spectrum and established the theoretical model of this Raman amplifier were analyzed. Through solving the coupled equation, the constraint condition for realizing gain-flattened is deduced, showing that the fiber length and pump power are two parameters affecting gain flatness of Raman fiber amplifier. Numerical simulation results show that a photonic crystal Raman fiber amplifier with 21 dB high gain and only 0.14 dB gain flatness over the bandwidth range of 1 508 nm to 1 544 nm, can be obtained. It will play an important role in the design of high efficient optical fiber communication systems. &copy; 2017, Science Press. All right reserved.

Number of references:16

Main heading:Fiber amplifiers

Controlled terms:Crystal whiskers - Fibers - Optical communication - Optical fiber communication - Optical fibers - Photonic crystal fibers

Uncontrolled terms:Constraint conditions - Gain flatness - High nonlinear - Raman amplifier - Raman fiber amplifiers - Raman gain coefficients - Steady-state analysis - Theoretical modeling

Classification code:717.1  Optical Communication Systems - 741.1.2  Fiber Optics - 744.4  Solid State Lasers - 933.1.1  Crystal Lattice

Numerical data indexing:Decibel 1.40e-01dB, Decibel 2.10e+01dB, Size 1.51e-06m to 1.54e-06m

DOI:10.3788/gzxb20174607.0723002

Database:Compendex

Compilation and indexing terms, Copyright 2017 Elsevier Inc.

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