星间激光通讯中的精跟踪研究  

Fine tracking in space laser communication

作　　者：刘锡民[1] 刘立人[1] 孙建锋[1] 郎海涛[1] 潘卫清[1] 赵栋[1] 

机构地区：[1]中国科学院上海光学精密机械研究所信息光学实验室,上海201800

出　　处：《物理学报》2005年第11期5149-5156,共8页Acta Physica Sinica

基　　金：国家高技术研究发展计划资助的课题.~~

摘　　要：星间激光通讯中,精跟踪起着十分重要的作用,而精密偏转镜(FSM)是精跟踪系统中最为关键的部件.基于光学矢量反射定律,推导得到了FSM的精确光学特性,这一特性为精跟踪控制系统提供了精确的理论依据.设计了基于FSM精确光学特性的精跟踪控制系统,对系统整定所用的单纯形法进行了两点重要改进,并对所设计的精跟踪系统进行了数字模拟,由此实现了对FSM的精确控制,提高了精跟踪系统的精确性;将光学衍射超分辨原理应用到星间激光通讯中.利用三区位相光瞳滤波器的超分辨性能,改变光学系统的点扩散函数,从而改变接收端焦平面上的光强分布.由此减小接收衍射光斑的大小,提高系统的光学分辨能力,从而提高精跟踪系统的精确性.Fine tracking plays an important role in space laser communication, and the Fine Pointing Mirror（FSM） is a key component in fine tracking system. Based on the optical vector reflection law, the accurate optical characteristics of FSM is deduced, which serves as the theoretical basis for fine tracking study. A fine tracking control system based on the FSM accurate optical characteristic is introduced. For system regulation, two important improvements to the simplex method are obtained. Then a digital simulation of the fine tracking is given. So an accurate control of the FSM is accomplished and the accuracy of the fine tracking system is improved. The diffractive superresolution theory is introduced into the space laser communication. By using 3-zone phase pupil filter, the point spread function （PSF） of the optical system is modified, and the optical energy distribution at the focal plane is modified accordingly. Then the diffraction spot size is decreased, and the optical resolution is increased, so the accuracy of the fine tracking system is improved.

关 键 词：星间激光通讯 精跟踪 精密偏转镜(FSM) 超分辨 光瞳滤波器 光通讯 精跟踪 跟踪控制系统 跟踪系统 光学特性 光瞳滤波器 点扩散函数 FSM 反射定律 

分 类 号：TN929.1[电子电信—通信与信息系统]