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The holographic reconstructing algorithm and its error analysis about phase-shifting phase measurement

Frontiers of Electrical and Electronic Engineering in China 2007年第3期2卷 293-297页

作者： LU Xiaoxu ZHONG Liyun zhang yimo School of Information and Optoelectronic Science and Engineering South China Normal UniversityGuangzhou 510631China College of Life Science and Technology Jinan UniversityGuangzhou 510632China School of Precision Instrument and Optoelectronic Engineering Tianjin UniversityTianjin 300072China

Phase-shifting measurement and its error estimation method were studied according to the holographic principle.A function of synchronous superposition of object complex amplitude reconstructed from N-step phase-shifting through one integral period(N-step phase-shifting function for short)was *** N-step phase-shifting measurement,the interferograms are seen as a series of in-line holo-grams and the reference beam is an ideal parallel-plane *** the N-step phase-shifting function can be obtained by multiplying the interferogram by the original reference *** ideal conditions,the proposed method is a kind of synchro-nous superposition algorithm in which the complex ampli-tude is separated,measured and *** error exists in measurement,the result of the N-step phase-shifting function is the optimal expected value of the least-squares fitting *** the above method,the N+1-step phase-shifting function can be obtained from the N-step phase-shifting *** shows that the N-step phase-shifting function can be separated into two parts:the ideal N-step phase-shifting function and its *** phase-shifting errors in N-steps phase-shifting phase measurement can be treated the same as the relative errors of amplitude and intensity under the understanding of the N+1-step phase-shifting *** difficulties of the error estimation in phase-shifting phase measurement were restricted by this error esti-mation ***,the maximum error estimation method of phase-shifting phase measurement and its formula were proposed.

关键词： optical measurement information optics phase-shifting phase measurement N-step phase-shifting function N+1-step phase-shifting algorithm error

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Dynamic interconnection component using wireless infrared technology

引用

Frontiers of Electrical and Electronic Engineering in China 2007年第3期2卷 322-325页

作者： JIA Dagong WANG Guanghui zhang yimo zhang Yinxin JING Wencai ZHOU Ge College of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

An efficient dynamic interconnection model using wireless infrared technology and the theory of optical interconnections was constructed to design a dual-channel interconnection *** were three conditions between the rotating optical field and the stationary optical field:end separation,angle misalignment and lateral *** calculation formulas were given for these three conditions.A dual-channel optical interconnection com-ponent was designed based on the dynamic interconnection model and the data transmission rate of the component was *** experimental result showed that the dual-channel optical interconnection component could transmit optical signals across the rotating *** maximum transmission rate can reach 2.14 Mb/s.

关键词： dynamic spatial interconnection wireless infrared rotary joint transmission rate

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Comparison Study of Two Mehods for Realizing Real-time High-efficiency JTC

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Chinese Journal of Lasers 1995年第5期B4卷 455-462页

作者： GE Baozhen QIN Yuwen zhang yimo HUANG Zhanhua zhang Hong (Institute of Contemporary Optical Instruments Engineering,Tianjin University, Tianjin 300072, China) Tianjin Univ Tianjin China

ＣｏｍｐａｒｉｓｏｎＳｔｕｄｙｏｆＴｗｏＭｅｈｏｄｓｆｏｒＲｅａｌｉｚｉｎｇＲｅａｌ－ｔｉｍｅＨｉｇｈ－ｅｆｆｉｃｉｅｎｃｙＪＴＣＧＥＢａｏｚｈｅｎ；ＱＩＮＹｕｗｅｎ；ＺＨＡＮＧＹｉｍｏ；ＨＵＡＮＧＺｈａｎｈｕａ；Ｚ... 详细信息

ＣｏｍｐａｒｉｓｏｎＳｔｕｄｙｏｆＴｗｏＭｅｈｏｄｓｆｏｒＲｅａｌｉｚｉｎｇＲｅａｌ－ｔｉｍｅＨｉｇｈ－ｅｆｆｉｃｉｅｎｃｙＪＴＣＧＥＢａｏｚｈｅｎ；ＱＩＮＹｕｗｅｎ；ＺＨＡＮＧＹｉｍｏ；ＨＵＡＮＧＺｈａｎｈｕａ；ＺＨＡＮＧＨｏｎｇ（Ｉｎｓｔｉｔｕｔ...

关键词： optical pattern recognition optical self-adaptation hybrid optical correlator

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Design and Implementation of a Virtual Multi-channel Optical Ring

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Chinese Journal of Lasers 2001年第6期10卷 12-17页

作者： JING Wencai ZHOU Ge zhang yimo LI Haifeng zhang Hongxia (College of Precision Instrument & Opto-electronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information Technical Science, EMC, Tianjin 300072, China) 天津大学精密仪器与光电子工程学院教育部光电信息技术科学重点实验室天津 300072

The hardware and the communication protocol of a scalable optical ring have been designed. A hardware routing has been achieved on the network interface card to minimize data packet communication latency and a simplified communication protocol has been designed to reduce communication overheads. To reduce the data packet blocking probability and have a more efficient usage of the data link layer bandwidth, a virtual multi-channel transmission mechanism has been achieved. The network supports a maximum of 16 virtual channels for each physical data link. Time slots can be dynamically assigned to each virtual channel. Zero wait time has been achieved for the switching between different virtual channels.

关键词： communication protocol scalable optical ring hardware routing virtual multi-channel transmission time slot

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The Detection of Defects in Optical Fibers Using a Hybrid Opto-electronic Correlator

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Chinese Journal of Lasers 2000年第3期9卷 15-21页

作者： LIU Yange LIU Wei zhang yimo ZHOU Ge (College of Precision Instrument and Opto-electronics Engineering, Tianjin University Opto-electronic Information Science and Technology Lab., Tianjin 300072, China) 天津大学光电信息技术科学开放实验室天津

A hybrid opto-electronic correlator for detecting defects i n optical fibers is proposed. After the light from a He-Ne laser being expanded and filtered it is not collimated but directly passes a Fourier transform lens and illuminates a reference fiber and a test fiber at the same input plane. The Fourier transform spectrum of the two fibers is therefore obtained at the rear focal plane of the lens, where it is sampled via a CCD array connected with a computer through a frame grabber. The computer performs filter, inverse Fourier transform and setting threshold operation on classification. The system is an equivalent of joint transform correlator with a Fourier lens of long focal length. The experiment results for optical fibers having incoordinate defects are presented. The results indicate that the system can be used for fiber defect detection, and has the advantages of high identification, compact configuration, easy adjustment and flexible manipulation.

关键词： joint transform correlation Fourier transform optical fiber defect detection

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计算机光互连技术的应用前景

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激光与光电子学进展 2007年第7期44卷 16-26页

作者：张以谟天津大学精密仪器与光电子工程学院光电子技术科学教育部重点实验室天津300072

“光互连”是利用光的波粒二相性与物质相互作用产生的各种现象实现数据,信号传输和交换的理论和技术。简述了其特点、国内外发展概况,物理依据,技术特性以及超型计算机光互连的必要性和可行性。讨论了光互连的若干前沿技术:微机电系统... 详细信息

“光互连”是利用光的波粒二相性与物质相互作用产生的各种现象实现数据,信号传输和交换的理论和技术。简述了其特点、国内外发展概况,物理依据,技术特性以及超型计算机光互连的必要性和可行性。讨论了光互连的若干前沿技术:微机电系统光互连、多级电控全息交叉互连、空分-波分复用联合的广播和选择交换系统在超型机或机群系统中的应用。

关键词：光互连计算机技术应用

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Recent Progress of Fiber Sensing Technologies in Tianjin University

引用

Photonic Sensors 2011年第1期1卷 90-96页

作者： Tiegen LIU Kun LIU Junfeng JIANG Enbang LI Hongxia zhang Dagong JIA yimo zhang Key Laboratory of Opto-electronics Information and Technical Science College of Precision Instrument&Opto-electronics EngineeringTianjin UniversityTianjin 300072China

The up to date progress of fiber sensing technologies in Tianjin University are proposed in this ***-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber is *** demodulation for extrinsic Fabry-Perot interferometer(EFPI)and fiber Bragg grating(FBG)sensors is realized based on white light *** concentration detection is realized based on intra-cavity fiber laser *** maintaining fiber(PMF)is used for distributed position or displacement *** on the before work and results,we gained National Basic Research Program of China on optical fiber sensing technology and will develop further investigation in this area.

关键词： Fiber sensing high temperature parallel demodulation gas detection distributed sensing

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Study　On　Laser　Fiber　Diameter　Measurement　Instrument

引用

Chinese Journal of Lasers 1995年第6期B4卷 543-548页

作者： ZHOU Ge LIU Zeyi LI Heqiao MAO Yi zhang yimo(Institute of Optoelectronic & Precision Engineering ☆Dept. ofMathematics,Tianjin, Tiajin 300072, China)Received 5 Dec. 1994 Revised manuscript received 17 Apr. 1995 Tianjin Univ Tianjin China

ＳｔｕｄｙＯｎＬａｓｅｒＦｉｂｅｒＤｉａｍｅｔｅｒＭｅａｓｕｒｅｍｅｎｔＩｎｓｔｒｕｍｅｎｔ￥ＺＨＯＵＧｅ；ＬＩＵＺｅｙｉ；ＬＩＨｅｑｉａｏ；ＭＡＯＹｉ；ＺＨＡＮＧＹｉｍｏ（ＩｎｓｔｉｔｕｔｅｏｆＯｐｔｏｅｌｅｃｔｒ... 详细信息

ＳｔｕｄｙＯｎＬａｓｅｒＦｉｂｅｒＤｉａｍｅｔｅｒＭｅａｓｕｒｅｍｅｎｔＩｎｓｔｒｕｍｅｎｔ￥ＺＨＯＵＧｅ；ＬＩＵＺｅｙｉ；ＬＩＨｅｑｉａｏ；ＭＡＯＹｉ；ＺＨＡＮＧＹｉｍｏ（ＩｎｓｔｉｔｕｔｅｏｆＯｐｔｏｅｌｅｃｔｒｏｎｉｃ＆ＰｒｅｃｉｓｉｏｎＥｎｇ...

关键词： optical power spectrum fiber diameter distribution

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Multi-channel　Associative　Memory　Using　Liquid　Crystal　Photoelectric　Switches

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Chinese Journal of Lasers 1995年第6期B4卷 495-500页

作者： LI Heqiao LIU Wei zhang yimo(Institute of Opto-electronics and Precision Engineering, Tianjin University,Tianjin 300072, China)Received 9 May 1995 Revised manuscript received 30 July 1995 Supported by National 863 High Technology Project. Tianjin Univ Tianjin China

Ｍｕｌｔｉ－ｃｈａｎｎｅｌＡｓｓｏｃｉａｔｉｖｅＭｅｍｏｒｙＵｓｉｎｇＬｉｑｕｉｄＣｒｙｓｔａｌＰｈｏｔｏｅｌｅｃｔｒｉｃＳｗｉｔｃｈｅｓ￥ＬＩＨｅｑｉａｏ；ＬＩＵＷｅｉ；ＺＨＡＮＧＹｉｍｏ（ＩｎｓｔｉｔｕｔｅｏｆＯ... 详细信息

Ｍｕｌｔｉ－ｃｈａｎｎｅｌＡｓｓｏｃｉａｔｉｖｅＭｅｍｏｒｙＵｓｉｎｇＬｉｑｕｉｄＣｒｙｓｔａｌＰｈｏｔｏｅｌｅｃｔｒｉｃＳｗｉｔｃｈｅｓ￥ＬＩＨｅｑｉａｏ；ＬＩＵＷｅｉ；ＺＨＡＮＧＹｉｍｏ（ＩｎｓｔｉｔｕｔｅｏｆＯｐｔｏ－ｅｌｅｃｔｒｏｎｉｃｓａｎ...

关键词： associative memory liquid crystal photoelectric switch four-channel parallelprocessing

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联合变换相关器在光纤检测中离焦影响的讨论

引用

光学学报 2001年第2期21卷 181-185页

作者：刘卫刘艳格张以谟天津大学精密仪器与光电子工程学院

对联合变换相关器在光纤检测中离焦采集谱问题进行了理论分析、计算机模拟以及光纤缺陷检测实验。得出了离焦距离与相关峰值的关系曲线 ;示出了对不同相似程度的输入物的离焦谱和焦面谱两种情况下进行相关的计算机模拟结果 ;提供了在焦... 详细信息

对联合变换相关器在光纤检测中离焦采集谱问题进行了理论分析、计算机模拟以及光纤缺陷检测实验。得出了离焦距离与相关峰值的关系曲线 ;示出了对不同相似程度的输入物的离焦谱和焦面谱两种情况下进行相关的计算机模拟结果 ;提供了在焦面上和离焦一定范围两种情况下缺陷程度不同的光纤的相关检测结果。

关键词：傅里叶变换离焦谱焦面谱光纤检测联合变换相关器缺陷检测光学图像识别

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