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	Non-linear compensation algorithm of LOS locating in aerial remote sensor (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China 作者: Li J.; Li Y.; Li Y.; Li Y.; Li Y. 收藏 \| 浏览/下载：46/0 \| 提交时间：2013/03/25 A non-linear light-of-sight(LOS) locating compensation algorithm for certain aerial remote sensor is presented in this paper. The LOS locating system is composed of two main components which are an inertial reference frame to provide coarse LOS locating and a 2-axis Fast Steering Mirror to remove the frame's residual error. The azimuth and elevation of LOS are both affected by the FSM two-degree-of-freedom rotation which should be dealt with to raise the accuracy of LOS location. This paper extrapolates LOS locating algorithm of FSM by coordinate transformation and gives corresponding deviation analysis for different LOS poiting angles. It is found that the angle deviation grows rapidly with range of FSM's travel enlarging so the deviation must be eliminated. Through the data analysis for deviation a non-linear compensation algorithm is proved effective to reduce the error of LOS significantly. Taking LOS changing in [-3 deg 3 deg] as an example two analytic expressions are given and the LOS locating accuracy rises by 34 times compared with non-linear compensation unused and the cross coupling of LOS loating is 0.08%. 2011 IEEE.
	Analysis of spectrum narrowing of diode laser bar (EI CONFERENCE) 会议论文 OAI收割 Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China 作者: Liu Y.; Wang L.; Wang L.; Wang L.; Liu Y. 收藏 \| 浏览/下载：28/0 \| 提交时间：2013/03/25 Laser diode bar (LDB) are used increasingly often for many applications but spectral bandwidth of LDB are generally approximately 2-4nm far too wide for many demanding applications e.g. spin-exchange optical pumping terahertz generation and lidar. External-cavity feedback can improve the spectral properties of LD or LDB. However spectrum narrowing of LDB is more difficult than that of LD. Bar curvature (i.e. "smile") produced in the manufacturing process affects the spectrum narrowing greatly. By geometrical optics approach and ORIGIN software smile which can be corrected by plano-convex cylindrical lens is simulated and the result is in good agreement with experiment. The selection of grating which is also a critical factor of spectrum narrowing will be stated. Finally an external cavity consisting of fast axis collimator two plano-convex cylindrical lens and a diffraction grating is used. The scheme is implemented on a 19-element LDB and yields 3-fold reduction in spectral linewidth under the situation that all optical elements in the system which are not optimized. Further we use a slit in the experiment and analyze the spectrum narrowing of each element in LDB.
	基于同步移相技术的1/4波片快轴方位角的实时测量期刊论文 OAI收割 Chin. Opt. Lett., 2008, 卷号: 6, 期号: 8, 页码: 568, 571 杨坤; 曾爱军; 王向朝; 王华; 唐锋收藏 \| 浏览/下载：1334/147 \| 提交时间：2009/09/18 偏振 Fast-axis angle 1/4波片 Quarter-wave plate 快轴方位角 Real-time measurements 同步移相
	Research on shaftless fast-steering mirror used in a precision tracking-aiming system (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Wang Y.; Guo J.; Guo J.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：36/0 \| 提交时间：2013/03/25 Based on the analysis of principle of tracking and aiming system some important factors to design the structure of tracking-aiming system and the layout of optical system are discussed. Besides the paper gives the present developing situation of fast-steering mirror at home and abroad analyzes the advantages and disadvantages of FSM with axis and presents a novel design of flexible axis FSM. The main axis of composite axis system is tracked by motor to drive the frame and the sub-axis is tracked by voice coil motor (VCM) to drive FSM. The structure of FSM and designing principle of VCM are introduced and the emulation analyses of inherent frequency and deformation under load of the FSM with software COSMOS are also given.
	基于基频分量消光的1/4波片快轴标定方法期刊论文 OAI收割中国激光, 2007, 卷号: 34, 期号: 11, 页码: 1553, 1556 杨坤; 曾爱军; 王向朝; 王华收藏 \| 浏览/下载：1254/173 \| 提交时间：2009/09/18 测量与计量 measurement and metrology 偏振 polarization 1/4波片 quarter-wave plate 快轴 fast axis 相位调制器 phase modulator 琼斯矩阵 Jones matrix
	部分端面抽运板条激光器腔镜倾斜问题研究期刊论文 OAI收割中国激光, 2005, 卷号: 32, 期号: 12, 页码: 1593, 1598 王宁; 陆雨田收藏 \| 浏览/下载：1405/187 \| 提交时间：2009/09/18 激光技术 laser technique 腔镜倾斜 mirror tilt 快速傅里叶算法 fast Fourier-transform algorithm 离轴混合腔 off-axis hybrid resonator
	新型板条激光器的离轴混合腔模场计算期刊论文 OAI收割中国激光, 2005, 卷号: 32, 期号: 9, 页码: 1161, 1165 张玲玲; 黄燕; 孟俊清; 胡企铨收藏 \| 浏览/下载：1739/197 \| 提交时间：2009/09/18 激光技术 laser technique 新型双板条激光器 novel dual-slab laser 离轴混合腔 off-axis hybrid resonator 光束质量 beam quality 快速傅里叶变换 fast Fourier transform