摘要
在大气激光通信中捕获对准跟踪(APT)是通信成功的前提。对空间激光通信中的捕获对准跟踪系统常用的两种光束定位探测器件CCD和四象限光电探测器(QD)的特性进行了深入分析,研究了影响大气激光通信跟踪系统性能的5种大气湍流效应,分别讨论了光束漂移、光强起伏、光斑弥散、到达角起伏及光束扩展的原理及对应仿真结果。结合大气湍流和探测器,针对质心跟踪算法和形心跟踪算法进行深入分析,得到并实验验证了在大气条件下形心算法的跟踪误差小于质心误差的结论。
Abstraet Acquisition pointing tracking （APT） is the precondition for communications in atmospheric laser communication system. CCD and quadrant detector （0D） which used in APT are deeply studied for their characteristics, and five kinds of turbulence effects such as beam wander, intensity fluctuations, dispersed spot, angle of arrival fluctuation and beam spreading for tracking precision and their mathematical models are discussed. Then, simulation results of turbulence effects under various conditions are analyzed. Both theoretical analysis and experimental results show that tracking error of shape center capturing algorithms is less than that of centroid localization algorithm which combines five kinds of turbulence effects.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第5期124-131,共8页
Chinese Journal of Lasers
基金
国家863计划(2003AA7012014
2008AA7010107)资助课题
关键词
光通信
捕获对准跟踪
大气湍流
质心算法
形心算法
optical communications
acquisition pointing tracking
atmosphere turbulence
centroid localizationalgorithm
shape center capturing algorithms
