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2010年
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第 1 条,共 27 条
标题: Linear and nonlinear optical properties of the PbSe quantum dots doped germano-silica glass optical fiber
作者: Watekar, PR (Watekar, Pramod R.); Ju, S (Ju, Seongmin); Lin, AX (Lin, Aoxiang); Kim, MJ (Kim, Myoung Jin); Lee, BH (Lee, Byeong Ha); Han, WT (Han, Won-Taek)
来源出版物: JOURNAL OF NON-CRYSTALLINE SOLIDS  卷: 356  期: 44-49  特刊: SI  页: 2384-2388  DOI: 10.1016/j.jnoncrysol.2010.02.012  出版年: OCT 1 2010 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 6
摘要: We report development of a new fiber doped with PbSe quantum dots for nonlinear optical applications. PbSe quantum dots related absorption peaks were obtained at 1021, 1093 and 1351 nm. The resonant optical nonlinearity and attenuation at 1500 nm were measured to be 9.4 x 10(-16) m(2)/W and 0.01 dB/m, respectively. The emission around 1540 nm was observed upon near resonant pumping at 1064 nm. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article; Proceedings Paper
会议名称: 12th International Conference on the Physics of Non-Crystalline Solids (PNCS12)
会议日期: SEP 06-09, 2009
会议地点: Foz do Iguacu, BRAZIL
作者关键词: Optical fiber; Quantum dots
Web of Science 类别: Materials Science, Ceramics; Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: 694GD
ISSN: 0022-3093
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第 2 条,共 27 条
标题: The near- and mid-infrared emission properties of Tm3+-doped GeGaS-CsI chalcogenide glasses
作者: Dai, SX (Dai Shixun); Peng, B (Peng Bo); Zhang, PJ (Zhang Pengjun); Xu, TF (Xu Tiefeng); Xunsi, W (Xunsi Wang); Nie, QH (Nie Qiuhua); Zhang, XH (Zhang Xianghua)
来源出版物: JOURNAL OF NON-CRYSTALLINE SOLIDS  卷: 356  期: 44-49  特刊: SI  页: 2424-2428  DOI: 10.1016/j.jnoncrysol.2010.03.020  出版年: OCT 1 2010 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 8
摘要: Serials of chalcogenide glasses based on composition of 72GeS(2)-18Ga(2)S(3)-10CsI (in mol%) and doped with high Tm3+ content (up to 10,000 ppm) were prepared, and their luminescence properties were investigated under excitation with 800 nm laser. The influences of doping concentration on Judd-Ofelt intensity parameter Omega(i) spontaneous transition probability A, fluorescence branching ratio beta, and radiative lifetime tau(rad) of Tm3+ in the samples were studied. Four infrared emission bands observed were centered at 1.48, 1.8, 2.3, and 3.8 mu m, corresponding to optical transitions H-3(4) -> F-3(4), F-3(4) -> H-3(6), H-3(4) -> H-3(5) and H-3(5) -> F-3(4), respectively. For 1.0 wt.% Tm3+: doped sample, no concentration quenching was observed and its emission cross-sections at 2.3 and 3.8 mu m calculated by using Fuchtbauer-Ladenburg equation were 6.85 x 10(-21) and 7.66 x 10(-21) cm(-2), respectively. (C) 2010 Elsevier B.V. All rights reserved.
文献类型: Article; Proceedings Paper
会议名称: 12th International Conference on the Physics of Non-Crystalline Solids (PNCS12)
会议日期: SEP 06-09, 2009
会议地点: Foz do Iguacu, BRAZIL
作者关键词: Rare earth ions; Thulium ions; Chalcogenide glasses; Mid-infrared
KeyWords Plus: LANTHANUM SULFIDE GLASS; RARE-EARTH IONS; GA-S GLASSES; OPTICAL-PROPERTIES; MU-M; TM3+; SPECTROSCOPY; INTENSITIES
Web of Science 类别: Materials Science, Ceramics; Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: 694GD
ISSN: 0022-3093
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第 3 条,共 27 条
标题: Packaging of High Power Semiconductor Laser Arrays Using a Novel Macro-channel Cooler
作者: Wang, JW (Wang, Jingwei); Yuan, ZB (Yuan, Zhenbang); Guo, L (Guo, Lu); Xiong, LL (Xiong, Lingling); Zhang, YX (Zhang, Yanxin); Peng, CH (Peng, Chenhui); Li, XN (Li, Xiaoning); Liu, XS (Liu, Xingsheng)
编者: Bi K; Yang Y; Dong G
来源出版物: 2010 11TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY & HIGH DENSITY PACKAGING (ICEPT-HDP)  页: 92-97  DOI: 10.1109/ICEPT.2010.5582358  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: High power semiconductor laser arrays have been widely used in many fields, such as pumping solid state laser aerospace, industry, medicine and display. For many applications, high power semiconductor lasers operating quasi-continuous wave (QCW) mode are demanded. For QCW laser, the output peak power is higher and average power is low. Therefore, the transient thermal density is very high. The most common method of removing the large amounts of waste heat in a semiconductor laser package is by using commercially-available copper micro-channel coolers (MCC). However, due to the coefficient of thermal expansion (CTE) mismatching between copper and laser chip, hard-solder cannot be directly used. On the other hand, indium solder has the problem of electro-thermal migration when the temperature grads were high in QCW mode. Furthermore, copper material is susceptible to erosion and corrosion. To overcome these hurdles in many applications, a novel macro channel cooler (MaCC) was presented in this work. The thermal behavior of MaCC-packaged high power semiconductor laser arrays in QCW mode was studied using finite element analysis (FEA). A high power of >250W QCW semiconductor laser array/bar using hard solder was fabricated. The performances of laser arrays, including output power, slope efficiency, threshold, conversion efficiency, spectral width, near field, lifetime etc. were characterized. The measured results indicated that the output power of a MaCC-packaged high power semiconductor laser array was very close to that of copper micro-channel cooler. Based on MaCC-packaged single laser array/bar, multiple-bar stack and two dimension area array lasers with output powers of several kilowatts and several tens of kilowatts were fabricated.
文献类型: Proceedings Paper
会议名称: 11th International Conference on Electronic Packaging Technology and High Density Packaging (ICEPT-HDP)
会议日期: AUG 16-19, 2010
会议地点: Xian, PEOPLES R CHINA
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: BJG84
ISBN: 978-1-4244-8142-2
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第 4 条,共 27 条
标题: A New Package Structure for High Power Single Emitter Semiconductor Lasers
作者: Zhang, YX (Zhang, Yanxin); Wang, JW (Wang, Jingwei); Peng, CH (Peng, Chenhui); Li, XN (Li, Xiaoning); Xiong, LL (Xiong, Lingling); Liu, XS (Liu, Xingsheng)
编者: Bi K; Yang Y; Dong G
来源出版物: 2010 11TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY & HIGH DENSITY PACKAGING (ICEPT-HDP)  页: 1346-1349  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: High power semiconductor lasers have found increased applications in pumping solid state or fiber laser systems for industrial, military and medical applications as well as direct material processing applications. The reliability requirement for high power semiconductor lasers has been increased in recent years and it has been proven that indium-free packaging is one of the most effective ways in improving lifetime. The performance including reliability of high power semiconductor lasers is highly depended on the package structure. We have designed a new package structure for high power single emitter semiconductor lasers which is called F-mount. In contrast to traditional single emitter package structures, the F-mount offers indium-free packaging while improving or at least not sacrificing the thermal management. The heat sink of this new structure is insulated and easy for system integration. Finite element numerical analysis was used to compare the thermal resistance between F-mount structure and traditional structure. It was found that F-mount has high power and high electrical-to-output efficiency than the traditional structure. Lifetime testing was conducted on the F-mount devices and it was found that there was no obvious degradation in power over 7000 hours.
文献类型: Proceedings Paper
会议名称: 11th International Conference on Electronic Packaging Technology and High Density Packaging (ICEPT-HDP)
会议日期: AUG 16-19, 2010
会议地点: Xian, PEOPLES R CHINA
KeyWords Plus: BARS
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: BJG84
ISBN: 978-1-4244-8142-2
________________________________________
第 5 条,共 27 条
标题: A New Continuous Wave 2500W Semiconductor Laser Vertical Stack
作者: Li, XN (Li, Xiaoning); Peng, CH (Peng, Chenhui); Zhang, YX (Zhang, Yanxin); Wang, JW (Wang, Jingwei); Xiong, LL (Xiong, Lingling); Zhang, P (Zhang, Pu); Liu, XS (Liu, Xingsheng)
编者: Bi K; Yang Y; Dong G
来源出版物: 2010 11TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY & HIGH DENSITY PACKAGING (ICEPT-HDP)  页: 1350-1354  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: With the increasing applications of high power semiconductor lasers in industrial, advanced manufacturing, military, aerospace, medical systems, display, entertainment. etc., semiconductor lasers with high power and high performances are required. The performance of semiconductor lasers is greatly affected by packaging structure, packaging process and beam shaping. In this work, a high power semiconductor laser vertical stack was successfully fabricated. A series of techniques such as spectrum control and beam control were used to achieve marrow spectrum and high beam quality. The performances of the semiconductor laser vertical stack were characterized. A high power of 2500 W, a narrow spectrum of 3.11 nm and an excellent rectangular beam shape were obtained. The lifetime of the vertical stack laser was tested as well.
文献类型: Proceedings Paper
会议名称: 11th International Conference on Electronic Packaging Technology and High Density Packaging (ICEPT-HDP)
会议日期: AUG 16-19, 2010
会议地点: Xian, PEOPLES R CHINA
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: BJG84
ISBN: 978-1-4244-8142-2
________________________________________
第 6 条,共 27 条
标题: A High Power Light Emitting Diode Module for Projection Display Application
作者: Peng, CH (Peng, Chenhui); Li, XN (Li, Xiaoning); Wang, JW (Wang, Jingwei); Xiong, LL (Xiong, Lingling); Zhang, YX (Zhang, Yanxin); Liu, XS (Liu, Xingsheng)
编者: Bi K; Yang Y; Dong G
来源出版物: 2010 11TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY & HIGH DENSITY PACKAGING (ICEPT-HDP)  页: 1412-1416  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Light emitting diode (LED) has numerous advantages such as long lifetime, large color gamut, small size and the absence of mercury vapor. In recent years, there has been recognition that LED could be an alternative light source for projection display application. In this work, dielectric compound parabolic concentrators (CPCs) were designed and optimized for multiple-LED array packaging structure for projection display application. The performance of rectangular CPC was studied and compared to theoretical simulations. Rectangular CPC was fabricated as the collector and collimator. A high power green LED module combined with rectangular CPC was fabricated and its performance was characterized. More than 90% light emitted by multiple-LED array can be collected by the CPC and transmit within the designed angle. A high power of 2.09W and a high luminous flux of 800 lm were obtained.
文献类型: Proceedings Paper
会议名称: 11th International Conference on Electronic Packaging Technology and High Density Packaging (ICEPT-HDP)
会议日期: AUG 16-19, 2010
会议地点: Xian, PEOPLES R CHINA
KeyWords Plus: SYSTEMS
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: BJG84
ISBN: 978-1-4244-8142-2
________________________________________
第 7 条,共 27 条
标题: Real-Time Compression System Research Based On DMD Hadamard Transform Spectrometer
作者: Fan, XY (Fan, Xianyun); Hu, BL (Hu, Bingliang); Li, ZT (Li, Zitian); Chen, XL (Chen, Xiaolai); Han, YJ (Han, Yajuan)
编者: Li M; Yu D
来源出版物: 2010 SYMPOSIUM ON SECURITY DETECTION AND INFORMATION PROCESSING  丛书: Procedia Engineering  卷: 7  页: 297-303  DOI: 10.1016/j.proeng.2010.11.048  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We propose a new lossy compression approach for hyperspectral images which comes from hadamard transform (HT) spectral imager for space-based surveillance that uses the Digital Micro-mirror Device (DMD) as the programmable mask other than the conventional mechanical mask. This paper firstly introduces that the DMD Hadamard spectrometer described in this paper is good at obtaining multi-channel high-energy high-SNR spectral data, which is superior to traditional ones. And then, based on the hardware platform composed of Xilinx FPGA and ADV212 (a codec chip for special JPEG2000), the sampled image data was then compressed with high SNR, high-resolution compression ratio. Last, we show the experimental results which demonstrate that the PSNR is up to 47.3dB and make no significant distortion for vision. Obviously, this approach takes distinguished advantages on real-time ability, image distortion and the practical value. The design can be utilized in national defense, earth resource survey aerospace, environmental disaster monitoring and other fields. (c) 2010 Published by Elsevier Ltd.
文献类型: Proceedings Paper
会议名称: 2010 Symposium on Security Detection and Information Processing
会议日期: 2010
会议地点: PEOPLES R CHINA
作者关键词: Image compression; ADV212; DMD; JPEG2000; Hadamard transform imaging spectrometer
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Physics, Applied
研究方向: Computer Science; Engineering; Physics
IDS 号: BTK27
ISSN: 1877-7058
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第 8 条,共 27 条
标题: Theodolite Self-stabilization Tracking Servo System Based on Mobile Platform
作者: Chen, W (Wang Chen); Ma, CW (Ma Caiwen); Hao, W (Hao Wei); Tian, GY (Tian Guangyuan)
编者: Xu H
来源出版物: 2ND IEEE INTERNATIONAL CONFERENCE ON ADVANCED COMPUTER CONTROL (ICACC 2010), VOL. 1  页: 98-102  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to improve the tracking and positioning accuracy of theodolite self-stabilization tracking based on mobile platform, the position of object is transformed from platform coordinate system to earth coordinate system by using coordinate axis circumrotation. A method of forecast tracking technique based on mobile platform is presented. The former compound angle is transform from platform coordinate to earth coordinate. The next compound angle is forecasted in earth coordinate, finally the forecast result is transform to the platform coordinate. The stable tracking technique based on mobile platform is realized. This forecast result is compared with direct forecast in platform coordinate. Tracking and positioning accuracy can be enhanced from 5' to 1.5', which fully prove that this forecast technique is more accurate and propitious to realize stable tracking on mobile platform.
文献类型: Proceedings Paper
会议名称: 2nd IEEE International Conference on Advanced Computer Control
会议日期: MAR 27-29, 2010
会议地点: Shenyang, PEOPLES R CHINA
作者关键词: Theodolite; Mobile platform; Self-stabilization tracking; Coordinate transformation
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Engineering
IDS 号: BUG25
ISBN: 978-1-4244-5847-9
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第 9 条,共 27 条
标题: Analysis of bonding stress with high strength adhesive between the reflector and the mounts in space camera
作者: Li, Y (Li, Yan); Hu, YM (Hu, YongMing); Li, YC (Li, YingCai); Qu, YS (Qu, YouShan); Ding, JT (Ding, JiaoTeng)
编者: Jiang W; Cho MK; Wu F
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: LARGE MIRRORS AND TELESCOPES  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7654  文献号: 76541F  DOI: 10.1117/12.867760  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The bond stress is analyzed when the optics were attached to their mounts with high strength adhesive in space camera. The model was founded that a circular planar reflector supported by one, three, six or twelve adhesive points, which evenly distributed on different circles. The surface deformation of reflector is mainly caused by the shrinkage after solidity. The functional relation was deduced between the bonding force of the reflector and the characteristic dimension of the adhesive spot using piecewise function, and then analyzing the RMS error of no gravity assuming that the adhesive spot is fixed connect to the reflector using Nastran. The analytical RMS error was the aberration which added by solidification of adhesive. The calculation result is in good agreement with the experiment results. This analyzing method will be useful for the microstress clamping of high performance reflector system for application in space optical systems.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Large Mirrors and Telescopes
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: Adhesive; shrinkage; piecewise function; RMS error
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Optics
研究方向: Engineering; Instruments & Instrumentation; Optics
IDS 号: BTQ41
ISSN: 0277-786X
ISBN: 978-0-8194-8084-2
________________________________________
第 10 条,共 27 条
标题: New Scheme of Sagnac Interferometric Fiber-Optic Current Sensor Insensible to Mechanical Vibration
作者: Mu, J (Mu, Jie); Zhao, W (Zhao, Wei); Wang, J (Wang, Jia); Xu, JT (Xu, Jin-tao)
编者: Zhang Y; Sasian JM; Xiang L; To S
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTICAL TEST AND MEASUREMENT TECHNOLOGY AND EQUIPMENT  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7656  文献号: 76563W  DOI: 10.1117/12.863862  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A new scheme of Sagnac interferometer fiber-optic current sensor insensible to mechanical vibration is presented. This scheme eliminates the Sagnac effect, which is responsible for the sensitivity to vibration according to theoretical analysis with Jones matrix. The improvement to the conventional Sagnac interferometer fiber-optic current sensor is achieved by changing the structure of sensing fiber coil. This coil is fabricated by the bifilar winding technique, and it consists of one half-wave plate embedded in the middle of sensing optical fiber and one quarter-wave plate rotated by 90 degrees in its lower input port. Experimental results suggest that, compared to the conventional design, this new-structured Sagnac interferometer fiber-optic current sensor has much better performance against strong mechanical vibration at accelerations up to 20 g and frequencies from 10 to 400 Hz. Furthermore, the current measurement accuracy of the improved fiber-optic current sensor achieves the 0.2-level at an acceleration of 20 g and a frequency of 150 Hz.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optical Test and Measurement Technology and Equipment
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: current sensor; vibration; Sagnac effect; Jones matrix; wave plate
KeyWords Plus: BIREFRINGENCE; FIBERS
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Optics; Physics
IDS 号: BTQ67
ISSN: 0277-786X
ISBN: 978-0-8194-8086-6
________________________________________
第 11 条,共 27 条
标题: New method to improve measurement accuracy of modulation transfer function
作者: Song, ZX (Song, Zongxi); Gao, W (Gao, Wei); Zhou, Y (Zhou, Yan); Liu, F (Liu, Feng)
编者: Zhang Y; Sasian JM; Xiang L; To S
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTICAL TEST AND MEASUREMENT TECHNOLOGY AND EQUIPMENT  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7656  文献号: 76561N  DOI: 10.1117/12.867707  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Modulation transfer function (MTF) of optical systems is often derived by taking Fourier transform (FT) of a measured line spread function (LSF). During MTF measurement process, the measurement accuracy of MTF will decrease as a result when LSF computed is not veracity. Based on the model constructed using the variance information of knife-edge and skew of the knife-edge, this paper presents a new method to improve the accuracy of measurement of MTF. The results showed that the new method can improve the accuracy of MTF to 0.01.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optical Test and Measurement Technology and Equipment
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: modulation transfer function (MTF); accuracy; variance; edge spread function (ESF); line spread function (LSF)
KeyWords Plus: DIGITAL RADIOGRAPHY; IMAGING PROPERTIES; MTF
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Optics; Physics
IDS 号: BTQ67
ISSN: 0277-786X
ISBN: 978-0-8194-8086-6
________________________________________
第 12 条,共 27 条
标题: High-precision Digital Synchronous System in the Physical Diagnosis of Multi-Beam Laser Target System
作者: Xue, YD (Xue Yingdong); Bai, YL (Bai Yonglin); Liu, BY (Liu Baiyu); Wang, B (Wang Bo); Li, Y (Li Yan); Ouyang, XA (Ouyang Xian); Gou, YS (Gou Yongsheng); Zhang, W (Zhang Wei)
编者: Zhang Y; Sasian JM; Xiang L; To S
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTICAL TEST AND MEASUREMENT TECHNOLOGY AND EQUIPMENT  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7656  文献号: 76565T  DOI: 10.1117/12.864668  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A high-precision synchronous system has been developed to control the diagnostic equipments in the multi-beam laser target experiment. In the system, both digital delay and analog delay techniques are used simultaneously to realize the high-precision time delay. By adopting the embedded intelligent chip FPGA, the resource consumption of the system is obviously reduced; the performance of the digital delay part is improved. In the analog delay part, the capacitor charging and discharging techniques are used to realize the delay resolution of 5 ps. To reduce the impact of the random trigger signals, the jitter compensation circuit is also used in the design. The high-precision time delay and strong anti-interference ability of the system are proved by the experimental results.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optical Test and Measurement Technology and Equipment
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: multi-beam laser; program control; FPGA; jitter compensation
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Optics; Physics
IDS 号: BTQ67
ISSN: 0277-786X
ISBN: 978-0-8194-8086-6
________________________________________
第 13 条,共 27 条
标题: Spectrum acquisition of detonation based on CMOS
作者: Li, Y (Li Yan); Bai, YL (Bai Yonglin); Wang, B (Wang Bo); Liu, BY (Liu Baiyu); Xue, YD (Xue Yingdong); Zhang, W (Zhang Wei); Gou, YS (Gou Yongsheng); Bai, XH (Bai Xiaohong); Qin, JJ (Qin Junjun); Ouyang, XA (Ouyang Xian)
编者: Jiang Y; Kippelen B; Yu J
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTOELECTRONIC MATERIALS AND DEVICES FOR DETECTOR, IMAGER, DISPLAY, AND ENERGY CONVERSION TECHNOLOGY  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7658  文献号: 76585C  DOI: 10.1117/12.865534  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The detection of high-speed dynamic spectrum is the main method to acquire transient information. In order to obtain the large amount spectral data in real-time during the process of detonation, a CMOS-based system with high-speed spectrum data acquisition is designed. The hardware platform of the system is based on FPGA, and the unique characteristic of CMOS image sensors in the rolling shutter model is used simultaneously. Using FPGA as the master control chip of the system, not only provides the time sequence for CIS, but also controls the storage and transmission of the spectral data. In the experiment of spectral data acquisition, the acquired information is transmitted to the host computer through the CameraLink bus. The dynamic spectral curve is obtained after the subsequent processing. The experimental results demonstrate that this system is feasible in the acquisition and storage of high-speed dynamic spectrum information during the process of detonation.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: High-speed spectrum acquisition and storage; CMOS image sensor; Rolling shutter; FPGA
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Materials Science; Optics; Physics
IDS 号: BTQ78
ISSN: 0277-786X
ISBN: 978-0-8194-8088-0
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第 14 条,共 27 条
标题: A Hyper-spectral Images Compression Algorithm based on 3-D Bit Plane Transform
作者: Zhang, L (Zhang, Lei); Xiang, LB (Xiang, Libin); Zhang, S (Zhang, Sam); Quan, SX (Quan, Shengxue)
编者: Jiang Y; Kippelen B; Yu J
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTOELECTRONIC MATERIALS AND DEVICES FOR DETECTOR, IMAGER, DISPLAY, AND ENERGY CONVERSION TECHNOLOGY  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7658  文献号: 76585R  DOI: 10.1117/12.867625  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: According the analyses of the hyper-spectral images, a new compression algorithm based on 3-D bit plane transform is proposed. The spectral coefficient is higher than the spatial. The algorithm is proposed to overcome the shortcoming of 1-D bit plane transform for it can only reduce the correlation when the neighboring pixels have similar values. The algorithm calculates the horizontal, vertical and spectral bit plane transform sequentially. As the spectral bit plane transform, the algorithm can be easily realized by hardware. In addition, because the calculation and encoding of the transform matrix of each bit are independent, the algorithm can be realized by parallel computing model, which can improve the calculation efficiency and save the processing time greatly. The experimental results show that the proposed algorithm achieves improved compression performance. With a certain compression ratios, the algorithm satisfies requirements of hyper-spectral images compression system, by efficiently reducing the cost of computation and memory usage.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: Hyper-spectral; image compression; bit plane
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Materials Science; Optics; Physics
IDS 号: BTQ78
ISSN: 0277-786X
ISBN: 978-0-8194-8088-0
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第 15 条,共 27 条
标题: The Analyze of the Interference Hyper-spectral Image Features and Compression
作者: Zhang, L (Zhang, Lei); Zhang, SC (Zhang, ShanCong); Bin, XL (Bin Xiangli); Quan, SX (Quan, Shengxue)
编者: Jiang Y; Kippelen B; Yu J
来源出版物: 5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTOELECTRONIC MATERIALS AND DEVICES FOR DETECTOR, IMAGER, DISPLAY, AND ENERGY CONVERSION TECHNOLOGY  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7658  文献号: 765839  DOI: 10.1117/12.867626  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Interference hyper spectral image and the images contain some interference information which are collected by the LASIS are only middle results of the spectrometer, is a three-dimensional image. The amount of the data is large size, and need to be compressed. For testing the actual interference hyper spectral image, use different composed way, to compose of LAMIS and LADIS image, the LASIS image has different target with different spectral band, LAMIS has the same target with different spectrum, LADIS has the same spectrum with different target. The spatial correlation and spectral correlation are analyzed. The self-coefficient and cross-coefficient are also calculated. The method that LASIS extract into LADIS is proposed, which separate interference information form spatial image, and it is a new foundation for interference information protection of LASIS image. The feather of LASIS image is revealed, the results obtained can be use LASIS image processing and compressing.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology
会议日期: APR 26-29, 2010
会议地点: Dalian, PEOPLES R CHINA
作者关键词: LASIS; image compression; Interference
Web of Science 类别: Engineering, Manufacturing; Instruments & Instrumentation; Materials Science, Multidisciplinary; Optics; Physics, Applied
研究方向: Engineering; Instruments & Instrumentation; Materials Science; Optics; Physics
IDS 号: BTQ78
ISSN: 0277-786X
ISBN: 978-0-8194-8088-0
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第 16 条,共 27 条
标题: Spatial and temporal evolution of transient stimulated-Brillouins-cattering slow-light pulse in an optical fiber
作者: Ren, LY (Ren, Liyong); Yang, YL (Yang, Yanlong); Zhao, W (Zhao, Wei); Tomita, Y (Tomita, Yasuo)
编者: Shahriar SM; Hemmer PR
来源出版物: ADVANCES IN SLOW AND FAST LIGHT III  丛书: Proceedings of SPIE  卷: 7612  文献号: 761207  DOI: 10.1117/12.840631  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Slow-light technology via stimulated Brillouin scattering (SBS) in an optical fiber has attracted a lot of attention owing to its flexible gain spectrum tailoring capacity, good compatibility with existing telecommunication systems, and great application for photonic switchers and routers in ultra-high-speed photonic networks. In this paper we present a general theoretical model for analyzing the dynamic behavior of the nonlinear interactions of the transient SBS process based on the three-wave coupled-amplitude equations for the pump, Stokes and acoustic waves. Spatial and temporal evolution of a generating slow-light pulse with the duration of sub-nanosecond under double broadband pump case is accurately simulated owing to the fact that our model includes the second-order derivative of the acoustic field. We conclude that the origin of the pulse broadening and distortion can be explained in terms of the temporal decay of the induced acoustic field.
文献类型: Proceedings Paper
会议名称: Conference on Advances in Slow and Fast Light III
会议日期: JAN 25-26, 2010
会议地点: San Francisco, CA
作者关键词: slow-light; stimulated Brillouin scattering (SBS); photonic crystal fiber; pulse distortion
KeyWords Plus: BROAD-BAND PUMP; SCATTERING; SBS; PROPAGATION; DELAY; ADVANCEMENT; SINGLE; GAIN
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BSE93
ISSN: 0277-786X
ISBN: 978-0-8194-8008-8
________________________________________
第 17 条,共 27 条
标题: Narrow linewidth and widely tunable operation of Tm-doped fiber laser with Volume Bragg gratings
作者: Shen, DY (Shen, Deyuan); Wang, YS (Wang, Yishan); Zhao, W (Zhao, Wei); Long, JY (Long, Jingyu); Li, C (Li, Cheng); Duan, KL (Duan, Kailiang)
编者: Singh UN; Fan D; Yao J; Walter RF
来源出版物: HIGH-POWER LASERS AND APPLICATIONS V  丛书: Proceedings of SPIE  卷: 7843  文献号: 784302  DOI: 10.1117/12.870061  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 1
摘要: High power and widely tunable operation of Tm-doped silica fiber laser around 2 mu m has been demonstrated using volume Bragg grating as the wavelength selection and spectrum narrowing element. The operating wavelength was continuously tunable from 1930 to 1821 nm, with > 52 W output power over a tuning range of 104 nm and a relatively narrow spectra width of < 15 pm. Over 60.8 W of diffraction limited (M-2 similar to 1.5) CW output power was generated for 137 W of launched pump power, corresponding to a slope efficiency with respect to launched pump power of 46%. Output characteristics with a conventional replica diffraction grating for wavelength selection were also investigated as a comparison with that of using a volume Bragg grating. A maximum output power of 30.6 W at 1963 nm was generated for 79 W of launched pump power and the lasing wavelength could be tuned over 196 nm from 1859 to 2055 nm at output power levels in excess of 20 W. The bandwidth of the laser output was similar to 0.8 nm.
文献类型: Proceedings Paper
会议名称: Conference on High-Power Lasers and Applications V
会议日期: OCT 18-19, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Tm-doped fiber; fiber laser; volume Bragg grating; narrow linewidth; tunable operation
KeyWords Plus: SOLID-STATE LASER; HIGH-POWER; HO-YAG; CAVITY
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BTQ40
ISSN: 0277-786X
ISBN: 978-0-8194-8373-7
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第 18 条,共 27 条
标题: A Novel Image Quality Metric Based on Morphological Component Analysis
作者: Li, XL (Li, Xuelong); He, LH (He, Lihuo); Lu, W (Lu, Wen); Gao, XB (Gao, Xinbo); Tao, DC (Tao, Dacheng)
书籍团体作者: IEEE
来源出版物: IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC 2010)  丛书: IEEE International Conference on Systems Man and Cybernetics Conference Proceedings  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Due to that human eye has different perceptual characteristics for different morphological components, so a novel image quality metric is proposed by incorporating morphological component analysis (MCA) and human visual system (HVS), which is capable of assessing the image with different types of distortion. Firstly, reference and distorted images are decomposed into texture and cartoon components by MCA respectively. Then these components are changed into perceptual features by just noticeable difference (JND) which integrates masking features, luminance adaptation and contrast sensitive function (CSF). Finally, the difference between reference and distorted images' perceptual features is quantified using a pooling strategy, and then the final result of the image quality is obtained. Experimental results demonstrate that the performance of the metric prevail over some existing methods on LIVE database II.
文献类型: Proceedings Paper
会议名称: IEEE International Conference on Systems, Man and Cybernetics
会议日期: OCT 10-13, 2010
会议地点: Istanbul, TURKEY
作者关键词: Image Quality Measurement; Morphological Component Analysis; Texture; Cartoon component; JND
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Cybernetics; Computer Science, Information Systems
研究方向: Computer Science
IDS 号: BWU85
ISSN: 1062-922X
ISBN: 978-1-4244-6588-0
________________________________________
第 19 条,共 27 条
标题: Experimental Research on Image Motion Measurement Using Optical Joint Transform Correlator for Space Camera Application
作者: Zhao, H (Zhao, Hui); Yi, HW (Yi, Hongwei); Li, YC (Li, Yingcai); Che, CC (Che, Chicheng); Xiao, X (Xiao, Xiao)
编者: Bruzzone L
来源出版物: IMAGE AND SIGNAL PROCESSING FOR REMOTE SENSING XVI  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7830  文献号: 78301D  DOI: 10.1117/12.864658  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The optical joint transform correlator (JTC) is an effective way to measure the image motion that is hard to be eliminated for space camera. In this manuscript, the principle of JTC is briefly introduced and then a static experiment is designed to demonstrate the suitability of JTC for space camera application. The results demonstrate that the RMS (root-mean-square) error of motion determination can be controlled below 0.15 pixels in both the horizontal and vertical direction, which is good enough to satisfy the space camera requirements. Besides that, the performance of two methods used to locate the cross-correlation peak is also evaluated. Compared with the traditional centroid computing method, Intensity Weighting Centroiding (IWC) is superior because it can not only reduce the sensitiveness of cross-correlation peak to window size selection, but also improves measurement accuracy.
文献类型: Proceedings Paper
会议名称: Conference on Image and Signal Processing for Remote Sensing XVI
会议日期: SEP 20-22, 2010
会议地点: Toulouse, FRANCE
作者关键词: joint transform correlator; image motion measurement; space camera; root-mean-square; centroid computing
Web of Science 类别: Engineering, Electrical & Electronic; Remote Sensing; Optics
研究方向: Engineering; Remote Sensing; Optics
IDS 号: BTQ36
ISSN: 0277-786X
ISBN: 978-0-8194-8347-8
________________________________________
第 20 条,共 27 条
标题: An Analytical Investigation of Excitonic Absorption in Terahertz-Driven Quantum Wells
作者: Zhang, TY (Zhang, Tong-Yi); Zhao, W (Zhao, Wei)
编者: Zhang C; Zhang XC; Siegel PH; He L; Shi SC
来源出版物: INFRARED, MILLIMETER WAVE, AND TERAHERTZ TECHNOLOGIES  丛书: Proceedings of SPIE  卷: 7854  文献号: 78540I  DOI: 10.1117/12.868775  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: An analytical solution of the optical susceptibility of quantum wells driven by a terahertz (THz) field is achieved based on the density-matrix formalism. A simplified three-level model is adopted for the quantum well structures, with the levels coupled by a near-infrared (NIR) and a THz field. The equation of motion for the polarization is derived from Liouville's equation for the density matrix. Using Floquet's theorem, and under the rotating-wave approximation with respect to the NIR probe field, analytical expression for the optical susceptibility of the driven quantum wells is obtained. Different features rising induced by the driving THz field in the absorption spectrum of the NIR probe are discussed for the THz field near resonance and out of resonance of the intra-excitonic transition. This analytical investigation of the susceptibility of the THz-field-driven quantum wells is much useful for clearly identifying the physical principles obscured in the full numerical calculations.
文献类型: Proceedings Paper
会议名称: Conference on Infrared, Millimeter Wave, and Terahertz Technologies
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: excitonic absorption; THz-driven; ac Stark effect; density-matrix formalism
KeyWords Plus: SIDE-BAND GENERATION; OPTICAL-ABSORPTION; FIELD; MAGNETOEXCITONS
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BTO94
ISSN: 0277-786X
ISBN: 978-0-8194-8384-3
________________________________________
第 21 条,共 27 条
标题: Separating misalignment from misfigure in stigmatic null tests of conic mirrors
作者: Chen, QF (Chen Qinfang); Ma, Z (Ma Zhen); Li, YC (Li Yingcai); Li, XY (Li Xuyang)
编者: Wang Y; Bentley J; Du C; Tatsuno K; Urbach HP
来源出版物: OPTICAL DESIGN AND TESTING IV  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7849  文献号: 784909  DOI: 10.1117/12.869784  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Null testing of off-axis conic surface at the pair of conjugate foci can add sensitivity resulting from double pass off the test piece. However, the alignment procedure of the test is difficult. The main reason is that the return wavefront from off-axis aspheric surface is not rotationally symmetric so that the observer cannot tell if the wavefront asymmetries are due to surface or misalignment errors. In this paper, we analyze the effect of misalignments on test results with the optical path method, and derive an equation for misalignment-induced aberrations. Next we present an optimum method for the removal of alignment errors. As an example the method is applied to the alignment of an off-axis mirror. After several alignments, a misaligned test system giving 0.093 lambda rms wavefront error can be adjusted to 0.024 lambda, at 0.6328 microns.
文献类型: Proceedings Paper
会议名称: Conference on Optical Design and Testing IV
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Asphere testing; misalignment; off-axis conic mirrors
KeyWords Plus: OFF-AXIS
Web of Science 类别: Microscopy; Optics
研究方向: Microscopy; Optics
IDS 号: BTP41
ISSN: 0277-786X
ISBN: 978-0-8194-8379-9
________________________________________
第 22 条,共 27 条
标题: Design of a four-mirror optical system with wide field of view
作者: Liang, ST (Liang Shi-tong); Yang, JF (Yang Jian-feng); Xue, B (Xue Bin); Ruan, P (Ruan Ping)
编者: Wang Y; Bentley J; Du C; Tatsuno K; Urbach HP
来源出版物: OPTICAL DESIGN AND TESTING IV  丛书: Proceedings of SPIE  卷: 7849  文献号: 784930  DOI: 10.1117/12.871717  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Reflective optics is used widely in space optical systems for their achromatization, large aperture and lightweight compared with refractive systems. Four-mirror system especially off-axis system is desired for its excellent imaging performance and compact structure. Aberration theory of coaxial four-mirror system based on PW method is analyzed and the design procedure is proposed to get the initial four-mirror system in this paper. A large field off-axis four-mirror system is designed based on the theory and the design process. The system contains four conic aspheric mirrors. It has a 2 degrees x0.32 degrees rectangular field of view. The MTF of the system is diffraction-limited and the distortion is less than 0.1%. The structure of the system is compact and the ratio of total axis length to focal length is about 1/3.9. The excellent imaging performance and compact structure make it adaptable to space remote sensing systems.
文献类型: Proceedings Paper
会议名称: Conference on Optical Design and Testing IV
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Aberration theory; Four-mirror system; PW method; Remote sensing; Space camera
KeyWords Plus: SPHERICAL MIRRORS
Web of Science 类别: Microscopy; Optics
研究方向: Microscopy; Optics
IDS 号: BTP41
ISSN: 0277-786X
ISBN: 978-0-8194-8379-9
________________________________________
第 23 条,共 27 条
标题: Comprehensive performance analysis of popular odd-symmetric phase masks used for wave-front coded imaging system
作者: Zhao, H (Zhao, Hui); Li, YC (Li, Yingcai)
编者: Wang Y; Bentley J; Du C; Tatsuno K; Urbach HP
来源出版物: OPTICAL DESIGN AND TESTING IV  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7849  文献号: 78491B  DOI: 10.1117/12.868287  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Wave-front coding was proposed in 1995 and is a powerful system-level technique used to extend the depth of field (DOF) of incoherent imaging system. The key to wave-front coding lies in the design of suitable phase masks which make the imaging system insensitive to defocus and defocus-related aberrations. Among all phase masks used for wave-front coding, odd-symmetric types are dominant and can provide larger extended DOF. With the acceptable degradation of MTF (Modulation Transfer Function) taken as a criterion, optimization procedure is used to obtain the optimum parameters for popular odd-symmetric phase masks and then a comprehensive analysis is carried out by considering four factors: DOF extension capability, sensitiveness to elementary aberrations, PSF (Point Spread Function) shifting effect and restorability of intermediate blurred images. To the best of our knowledge, the comprehensive analysis on performance of popular odd-symmetric phase masks, as done in this manuscript, has not been made before. So, the work reported here could be considered as a complementary part to the field of wave-front coding.
文献类型: Proceedings Paper
会议名称: Conference on Optical Design and Testing IV
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: wave-front coding; depth of field; odd-symmetric phase masks; incoherent imaging system
KeyWords Plus: FIELD; DEPTH; EXTEND
Web of Science 类别: Microscopy; Optics
研究方向: Microscopy; Optics
IDS 号: BTP41
ISSN: 0277-786X
ISBN: 978-0-8194-8379-9
________________________________________
第 24 条,共 27 条
标题: Experimental research for broadband spatial heterodyne spectroscopy
作者: Feng, YT (Feng, Yutao); Bai, QL (Bai, Qinglan); Yan, P (Yan, Peng); Hu, BL (Hu, Bingliang); Wen, DS (Wen, Desheng)
编者: Yoshizawa T; Wei P; Zheng J; Shimura T
来源出版物: OPTOELECTRONIC IMAGING AND MULTIMEDIA TECHNOLOGY  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7850  文献号: 78501U  DOI: 10.1117/12.870229  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Spatial heterodyne spectrometers have been used in multiple scientific studies since their invention and early development. Broadband spatial heterodyne spectrometers also have the advantages of large etendue, high spectral resolving powers, and high data collection rates as traditional spatial heterodyne spectrometer. Basic theory, design and performance parameters, breadboard experiment for a broadband, high-resolution spatial heterodyne spectrometer are reported. The experimental spatial heterodyne spectrometer achieves a design resolution 0.39cm-1. Firstly, it is demonstrated that broadband spatial heterodyne spectrometer have the advantages of wide spectral coverage and high spectral resolving power simultaneously; secondly, the effects of optical defects on the system are discussed; thirdly, Two dimension interference data procession also is mentioned.
文献类型: Proceedings Paper
会议名称: Conference on Optoelectronic Imaging and Multimedia Technology
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Spatial heterodyne spectroscopy; broadband spectral range; two dimension Fourier Transform; remote sensing
KeyWords Plus: SPECTROMETER
Web of Science 类别: Engineering, Biomedical; Optics; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Imaging Science & Photographic Technology
IDS 号: BTP43
ISSN: 0277-786X
ISBN: 978-0-8194-8380-5
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第 25 条,共 27 条
标题: An improved centroid detection method based on higher moment for Shack-Hartmann wavefront sensor
作者: Xia, AL (Xia Ai-li); Ma, CW (Ma Cai-wen)
编者: Yoshizawa T; Wei P; Zheng J; Shimura T
来源出版物: OPTOELECTRONIC IMAGING AND MULTIMEDIA TECHNOLOGY  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7850  文献号: 78501Q  DOI: 10.1117/12.870136  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: The accuracy of the Shack-Hartmann wavefront sensor (SHWS) for measuring the distortion wavefront is mainly dependent upon the measurement accuracy of the centroid of the focal spot. Many methods have been presented to improve the accuracy of the wavefront centroid measurement by weakening the influence of various noises, such as the photo noise, the read-out noise, the background noise, unevenness and instability of the light source, etc. In general, these methods mainly use the first moment centroid algorithm to calculate the centroid in the whole sub-aperture. In this paper, we present an improved centroid measurement approach that calculate the centroid of the focal spot more precisely using the higher moment centroid method in an optimized detection window. Based on the improved method, the effects of various noises out of the optimized detection window are almost eliminated; furthermore, the noise influences in the optimized detection window are also weakened due to the more contributions of the focal spot intensity. The experimental results demonstrate that the precision and repeatability of focal spot centroid are more prominent than the results obtained via other commonly centroid methods.
文献类型: Proceedings Paper
会议名称: Conference on Optoelectronic Imaging and Multimedia Technology
会议日期: OCT 18-20, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: adaptive optics; Shack-Hartmann wavefront sensor; the centroid of focal spot; the first moment; the high moment
Web of Science 类别: Engineering, Biomedical; Optics; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Imaging Science & Photographic Technology
IDS 号: BTP43
ISSN: 0277-786X
ISBN: 978-0-8194-8380-5
________________________________________
第 26 条,共 27 条
标题: Ultracompact wave plates by air holes periodic dielectric waveguides
作者: Zhang, WF (Zhang, Wenfu); Liu, JH (Liu, Jihong); Huang, WP (Huang, Wei-Ping); Zhao, W (Zhao, Wei)
编者: Adibi A; Lin SY; Scherer A
来源出版物: PHOTONIC AND PHONONIC CRYSTAL MATERIALS AND DEVICES X  丛书: Proceedings of SPIE  卷: 7609  文献号: 76091H  DOI: 10.1117/12.845956  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Ultracompact wave plate (UWP) will be one of the key elements in future all-optical photonic integrated circuits (PICs). In this paper, we propose UWPs based on periodic dielectric waveguides (PDWs) with air holes in conventional dielectric waveguides. The mode characteristics (for both TE and TM) and birefringence of PDWs are calculated by plane wave method (PWM). The transmission efficiencies and phase changing of TE and TM waves in PDW are obtained by finite-difference time-domain (FDTD) scheme. Based on the PDWs, the quarter-wave plates (QWPs) and half-wave plates (HWPs) are designed. Calculating results show that the proposed PDW has large birefringence (Delta n>1) and can introduce 2 pi phase difference with a short length being less than lambda. The size of low order UWPs are compact. The transmission efficiency of PDW is improved by taper structure. Based on the taper PDW, ultra-wide band (>100 nm) achromatic QWP is designed. Profiting from the waveguide guiding, the UWPs have low beam divergence and can be easily integrated with other photonic components. The UWPs have many potential applications in future PIC systems such as optical communications, optical measurements and sensors.
文献类型: Proceedings Paper
会议名称: Conference on Photonic and Phononic Crystal Materials and Devices X
会议日期: JAN 26-28, 2010
会议地点: San Francisco, CA
作者关键词: Periodic dielectric waveguides (PDWs); photonic crystal; birefringence; wave plates
KeyWords Plus: PHOTONIC CRYSTALS; TRANSMISSION CHARACTERISTICS; BIREFRINGENCE; CONSTRUCTION; DISPERSION; WAVEPLATE; MODES
Web of Science 类别: Crystallography; Optics
研究方向: Crystallography; Optics
IDS 号: BRW44
ISSN: 0277-786X
ISBN: 978-0-8194-8005-7
________________________________________
第 27 条,共 27 条
标题: Incoherent Dark Solitons Splitting in LiNbO(3):Fe Crystal
作者: Zhang, YH (Zhang Yuhong); Lu, KQ (Lu Keqing); Long, XW (Long Xuewen); Li, KH (Li Kehao); Guo, JB (Guo Jianbang)
编者: Gong Q; Guo GC; Shen YR
来源出版物: QUANTUM AND NONLINEAR OPTICS  丛书: Proceedings of SPIE-The International Society for Optical Engineering  卷: 7846  文献号: 78460U  DOI: 10.1117/12.868757  出版年: 2010 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We observed experimentally one-dimensional even-number sequence of dark photovoltaic solitons in LiNbO(3):Fe crystal without additional background illumination with spatially incoherent beam that contains a dark stripe generated from an amplitude jump in the center of the incoherent beam. In experiment, we found that the initial stripe width at the entrance face of the crystal is a key parameter for generating an even-number sequence of dark incoherent photovoltaic solitons. If the initial width of the dark stripe was small, only a Y-junction soliton pair was generated. As the initial width of the dark stripe was creased to 20.1 mu m, the stripe can split into an even-number sequence of soliton structure. The soliton pairs far away from the center had smaller width and less visibility. In addition, the separations between adjacent dark stripes became slightly smaller than that of the Y-junction dark solitons. In particular, when the input width in the entrance face of the crystal was 30.8 mu m, the diffractive beam in the output face of the crystal was no longer expanding its outer boundary, but shrank its width.
文献类型: Proceedings Paper
会议名称: Conference on Quantum and Nonlinear Optics
会议日期: OCT 18-19, 2010
会议地点: Beijing, PEOPLES R CHINA
作者关键词: photovoltaic solitons; amplitude mark; partially spatial incoherence
KeyWords Plus: PHOTOVOLTAIC SPATIAL SOLITONS; WAVE-GUIDES; PHOTOREFRACTIVE CRYSTALS; LIGHT
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BTP56
ISSN: 0277-786X
ISBN: 978-0-8194-8376-8
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