全双工逆向调制自由空间激光通信系统的设计与分析  

Design and Analysis of Full Duplex Modulating Retro-Reflector Free Space Laser Communication System

作　　者：李长盈 杨国伟[1,2] 毕美华 李晶[2] 李娜[2] 耿虎军[2] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018 [2]中国电子科技集团公司航天信息应用技术重点实验室,河北石家庄050081

出　　处：《无线电工程》2018年第3期244-248,共5页Radio Engineering

基　　金：国家自然科学基金资助项目(61405051;61501157;11574068);浙江省自然科学基金资助项目(LY17F050012;LQ16F050004;LZ15E050004);浙江省公益技术应用研究计划项目(2017C31067);中国电子科技集团公司航天信息应用技术重点实验室高校合作项目

摘　　要：逆向调制自由空间激光通信(MRR FSO)系统是将传统FSO链路的一个终端替换成逆向调制器(MRR)而构成的一个非对称FSO系统,因其功耗低、MRR端体积小和易安装等优点,成为自由空间光通信技术研究热点之一。针对MRR FSO系统现存在的捕获系统复杂、对准难度大等技术难题,在原有MRR FSO系统的基础上设计了一种全双工MRR FSO系统。其中光收发机端的共用光学天线模块采用较大孔径的反射式天文望远镜系统,主要用来减小光束发散角、增加接收孔径。MRR端采用单个大尺寸或多个小尺寸MRR器件,来提升反射光信号质量,并搭建室外长距离实验系统,对该MRR FSO系统进行测试,验证了该系统的合理性。结果表明,所设计的全双工MRR FSO系统在长距离全双工激光通信是可行的,为最终实现长距离全双工MRR FSO系统做铺垫,是未来MRR FSO技术的发展方向之一。Modulating Retro-Reflector（MRR） Free Space Laser Communication（FSO） system is an asymmetric FSO system in which a terminal of a traditional FSO link is replaced by MRR.Because of its low power consumption,smaller MRR size and easy installation,etc.,it has become one of the hot topics in FSO technology research.A full duplex MRR FSO system is designed on the basis of existing MRR FSO system to solve technical problems such as the complexity of existing capture system and the difficulty of alignment.One of the optical transceiver sides of the common optical antenna module uses a larger aperture reflective telescope system to reduce the beam divergence angle and increase the receiving aperture.The MRR terminal uses a single large size or multiple small size MRR devices to enhance the reflected light signal quality.An outdoor long distance MRR FSO experiment system is built and tested to verify the rationality of the system.The results show that the designed full duplex MRR FSO system is feasible in long-distance full duplex laser communication,and it provides a foundation for the ultimate realization of long-distance full-duplex MRR FSO system,which is one of the future development directions of MRR FSO technology.

关 键 词：自由空间激光通信 逆向调制 望远镜系统 全双工 

分 类 号：TN249[电子电信—物理电子学]