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2012 International Conference on Optoelectronics and Microelectronics最新文献

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Sub micro radian fine tracking system optimization design 亚微弧度精细跟踪系统优化设计
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316282
Yansong Song, S. Tong
{"title":"Sub micro radian fine tracking system optimization design","authors":"Yansong Song, S. Tong","doi":"10.1109/ICOOM.2012.6316282","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316282","url":null,"abstract":"The compound-axis APT servo control system is the important unit and key technology of the system of space laser communication, the fine tracking subsystem is further suppress the vibration residuals of the coarse tracking subsystem, it decides tracking accuracy of the whole servo system. This paper analyzes the impact of fine tracking error factor, and the characteristics of sources of error from the image detection and servo algorithm have been both optimized, We have built an experimental system in the laboratory and carried out experimental tests, In the simulation of satellite vibration condition can realize the tracking precision about 0.8μrad. The successful implementation of the sub-micro-radian dynamic tracking, Technological foundation for free space laser communication systems to achieve long-distance communications.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115950827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A fourth-order cascaded full feed-forward sigma-delta modulator 一个四阶级联全前馈σ - δ调制器
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316316
Qiang Lu, Xiaowei Liu
{"title":"A fourth-order cascaded full feed-forward sigma-delta modulator","authors":"Qiang Lu, Xiaowei Liu","doi":"10.1109/ICOOM.2012.6316316","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316316","url":null,"abstract":"This paper presents a structure of a fourth-order cascaded full feed-forward Sigma-delta modulator. Because there is no feedback but only feed-forward path between two stages, cascaded sigma-delta modulator is unnecessary to consider the stability problems, and has the identical performance with ideal high-order single-loop sigma-delta modulator. The system level simulation results show that the signal to noise rate (SNR) of the designed sigma-delta modulator is 148 and the effective number of bits (ENOB) is 24.4 when the oversampling ratio (OSR) is 128.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Reaserch on precision measurment for large scale 3D surface based on superior integration 基于优势集成的大型三维曲面精密测量研究
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316343
B. Jia, Qiongying Lv, H. Mokbel, Yuan Wan
{"title":"Reaserch on precision measurment for large scale 3D surface based on superior integration","authors":"B. Jia, Qiongying Lv, H. Mokbel, Yuan Wan","doi":"10.1109/ICOOM.2012.6316343","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316343","url":null,"abstract":"We developed a new type of 3D measurement system for large scale object or outdoor measurement which enabled us to obtain successive 3D range data applied superior integration technology. An object for computer 3D point clouds requires two following information: range information and 3 dimensions coordinate of each point about this object. We proposed superior integration technology using two mainly sensors: laser rangefinder and 2 axis compass. In this paper, we use a living example that measured a wind power tower outside to show how to get morphology of large scale object. In addition, large scale object have to be measured stay outside which may be very large extent. So we use the wireless transmission of multi-serial port technology to solve the problems that the venues are too large and the wires are too much.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124138454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the properties of gallium antimonide surface passivatied with S2Cl2 solution S2Cl2溶液钝化锑化镓表面性能的研究
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316206
Fang Chen, Guojun Liu, Zhipeng Wei, Rui Deng, X. Fang, Shanshan Tian, Y. Zou, Mei Li, Xiao-hui Ma
{"title":"Study on the properties of gallium antimonide surface passivatied with S2Cl2 solution","authors":"Fang Chen, Guojun Liu, Zhipeng Wei, Rui Deng, X. Fang, Shanshan Tian, Y. Zou, Mei Li, Xiao-hui Ma","doi":"10.1109/ICOOM.2012.6316206","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316206","url":null,"abstract":"The surface optical and chemical properties of gallium antimonide (GaSb) surfaces after dichloride disulfide (S<sub>2</sub>Cl<sub>2</sub>) and ammonium sulfide ((NH<sub>4</sub>)<sub>2</sub>S) treatments were compared. Photoluminescence (PL) spectroscopy is used to study the GaSb surfaces passivated by S<sub>2</sub>Cl<sub>2</sub> comparing to (NH<sub>4</sub>)<sub>2</sub>S solution, meanwhile, quantitative comparison using x-ray photoelectron spectroscopy (XPS) demonstrates that S<sub>2</sub>Cl<sub>2</sub> passivation dramatically improves the stability against reoxidation in air compared with the (NH<sub>4</sub>)<sub>2</sub>S solution. We found that S<sub>2</sub>Cl<sub>2</sub> method is quite effective for removing oxides of GaSb surface, besides, PL intensity of S<sub>2</sub>Cl<sub>2</sub>-passivated sample was higher than (NH<sub>4</sub>)<sub>2</sub>S-passivated sample, and stability of S<sub>2</sub>Cl<sub>2</sub>-passivated sample was also more sustained. Overall, S<sub>2</sub>Cl<sub>2</sub> provides to be superior passivation for III-V compound semiconductor material promising for high-speed and optoelectronic device applications.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124402487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Simulation and optimization of pump technology on high-power fiber laser 高功率光纤激光器泵浦技术的仿真与优化
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316220
L. Jin, Y. Zou, Xiao-hui Ma, Zibin Yang, Zhiwei Xue, Yueyue Jin, Li Xu, Qingxue Sui, Wei Zhao, Zhimin Zhang
{"title":"Simulation and optimization of pump technology on high-power fiber laser","authors":"L. Jin, Y. Zou, Xiao-hui Ma, Zibin Yang, Zhiwei Xue, Yueyue Jin, Li Xu, Qingxue Sui, Wei Zhao, Zhimin Zhang","doi":"10.1109/ICOOM.2012.6316220","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316220","url":null,"abstract":"Pump technology is one of the key technologies of the fiber laser and is directly related to the output power of fiber laser. This paper focuses on high-power fiber laser pumping technology. The pump models of end-pumped and multi-point side pumped were established by MATLAB. The influence of power distribution in fiber on the number and position of pumping points were investigated. The results can provide ideas for the optimization of power distribution in fiber laser.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114960528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
An improved fourth-order band-pass sigma-delta modulator with a novel resonator 带新型谐振腔的改进四阶带通σ - δ调制器
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316327
Xiaowei Liu, Honglin Xu, Jiajun Zhou, Song Chen, Jiang Yang
{"title":"An improved fourth-order band-pass sigma-delta modulator with a novel resonator","authors":"Xiaowei Liu, Honglin Xu, Jiajun Zhou, Song Chen, Jiang Yang","doi":"10.1109/ICOOM.2012.6316327","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316327","url":null,"abstract":"This paper presents an improved full differential low-voltage fourth-order Ong-band-pass sigma-delta modulator (Ong-BPSDM, proposed by Adrian K. Ong firstly) using a novel resonator based on Salo architecture. Compared with the reported Ong-BPSDM, the proposed fourth-order Ong-BPSDM utilizing a novel double-sampling and double-delay resonator which only needs one op-amp has a better performance with a lower capacitive load and lower power consumption. The performance specifications of the blocks of BPSDM are confirmed by building the behavior model of the system scheme in the environment of Simulink. The circuits are simulated through TSMC0.18μm CMOS process. The modulator achieves a peak signal to noise ratio (SNR) 85.5dB and DR 87dB in the center frequency 20MHz for a 200 KHz bandwidth. The power consumption of the circuits is as low as 27 mW with a 1.8V supply.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128708412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Design and performance of non-linear fuzzy logic PI controller for line of sight stabilized platform 瞄准线稳定平台非线性模糊PI控制器的设计与性能
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316291
A. Roshdy, Y. Lin, Che-Lun Su, H. Mokbel, Tongyu Wang
{"title":"Design and performance of non-linear fuzzy logic PI controller for line of sight stabilized platform","authors":"A. Roshdy, Y. Lin, Che-Lun Su, H. Mokbel, Tongyu Wang","doi":"10.1109/ICOOM.2012.6316291","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316291","url":null,"abstract":"Instead of conventional proportional integral (PI) controller, non-linear fuzzy proportional integral (NLFPI) controller is proposed to control an inertially stabilized platform. The strategy is to start with a tuned, conventional PI controller that achieve a certain desired performance, replace it with an equivalent linear fuzzy proportional integral (LFPI) controller, and finally convert the linear fuzzy controller to nonlinear fuzzy controller. The system performance and robustness are investigated. Simulation results demonstrate the effectiveness of the designed controller, which offers an excellent performance and robustness in the presence of uncertainty and nonlinearity.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129950613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
The effect of argon plasma cleaning on the surface characteristics of GaAs substrate 氩等离子体清洗对GaAs衬底表面特性的影响
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316205
Yunhua Wang, Lu Zhou, Baoshan Jia, Duanyuan Bai, Xu Yang, Xin Gao, B. Bo
{"title":"The effect of argon plasma cleaning on the surface characteristics of GaAs substrate","authors":"Yunhua Wang, Lu Zhou, Baoshan Jia, Duanyuan Bai, Xu Yang, Xin Gao, B. Bo","doi":"10.1109/ICOOM.2012.6316205","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316205","url":null,"abstract":"In this paper, GaAs substrate samples were treated by different Ar ion plasma cleaning process, and then a SiO2 passivation layer was deposited by radio frequency magnetron sputtering to avoid reoxidation or recontamination of the surface. Morphology, composition and fluorescence properties of GaAs substrate surface were investigated respectively by scanning electron microscope, energy dispersive X-ray spectrometer and rapid photoluminescence mapper. The results showed that GaAs samples treated under the condition of sputtering power 8W, chamber pressure 4.7Pa, Ar flow rate 40sccm and cleaning time 48min are free from damage, the oxygen and carbon content on the sample surface decreased obviously. Photoluminescence (PL) intensity increased by 66.73 %.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126434950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems 中波与长波热成像系统辐射测温精度的比较
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316344
Zhiyuan Sun, Wei Zhu
{"title":"Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems","authors":"Zhiyuan Sun, Wei Zhu","doi":"10.1109/ICOOM.2012.6316344","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316344","url":null,"abstract":"A comparison study on temperature measurement precision between middlewave 3-5μm and longwave 8-12μm measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K~900K. First, the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve, we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity, limited transmittance of the atmosphere, radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116658264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Theoretical modeling and simulation of Tm-doped double-clad fiber amplifier 掺铥双包层光纤放大器的理论建模与仿真
2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI: 10.1109/ICOOM.2012.6316244
Qijie Huang, T. Yu, Jifeng Zu, M. Tao
{"title":"Theoretical modeling and simulation of Tm-doped double-clad fiber amplifier","authors":"Qijie Huang, T. Yu, Jifeng Zu, M. Tao","doi":"10.1109/ICOOM.2012.6316244","DOIUrl":"https://doi.org/10.1109/ICOOM.2012.6316244","url":null,"abstract":"Based on the finite-difference method, a typical Tm-doped double-clad fiber amplifier modeling is comprehensively analyzed through the rate equations and propagation equations. The impacting factors such as amplified spontaneous emission (ASE), wavelength and power of the seed, fiber length, pumping power and fiber facet reflectivity are discussed. Simulation results show that there exist the most suitable fiber length and pump power while the amplifier has the maximum output power and the best signal to noise ratio. Moreover, the influence of ASE can be effectively inhibited by reducing the fiber facet reflectivity, especially the front fiber facet reflectivity, choosing the proper seed wavelength and increasing the seed power. The theoretical models and simulation results presented in this paper have a certain reference value for the design and development of high-power Tm-doped double-clad fiber amplifiers.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122688818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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