空间超高速数字相干激光通信问题与解决方法  

Problems and solutions of ultra-high speed digital coherent space laser communication

作　　者：陶坤宇 曹哲玮 杨奇 宋义伟 陈心怡 姜义君 付森 TAO Kunyu;CAO Zhewei;YANG Qi;SONG Yiwei;CHEN Xinyi;JIANG Yijun;FU Sen(Laser R&D Center of Detection Technology,Shanghai Radio Equipment Research Institue,Shanghai 201109,China;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]上海无线电设备研究所激光探测技术研发中心,上海201109 [2]华中科技大学光学与电子信息学院,武汉430074

出　　处：《光通信技术》2021年第5期44-49,共6页Optical Communication Technology

摘　　要：为了解决空间超高速率信息传输问题,保障我国天基宽带信息传输网的实现,分析了未来在空间进行超高速率激光通信采用数字相干体制的必要性,总结了现阶段实现这一目标存在的4个问题:单模光纤耦合、低噪声掺铒光纤放大器(EDFA)的放大、数字编解码算法和硬件架构问题。针对这4个问题逐一提出了解决方法,即快反镜(FSM)跟踪与自适应光纤章动、分段噪声抑制、浮点数并行处理算法和集成化。分析了空间激光通信技术水平的发展趋势,最后给出了对未来技术方向发展的预测。In order to solve the problem of ultra-high speed space transmission and ensure the realization of our country's space-based broadband communication network,the necessity of applying digital coherence scheme to ultra-high speed space laser communication is analyzed in this paper,four problems in achieving this goal existed at current stage are summarized as follows:single-mode fiber coupling,low noise amplification of the erbium doped fiber amplifier(EDFA),algorithm of digital encoding and decoding,and hardware architecture.The solutions to these four problems are put forward one by one:fast steering mirror(FSM)tracking and adaptive nutation,segmented noise suppression,floating point parallel processing algorithm and integration.This paper analyzes the development trend of space laser communication technology,and finally gives the prediction of the future development direction of technology.

关 键 词：激光通信 数字相干 单模光纤耦合 掺铒光纤放大器 编解码算法 

分 类 号：TN929.12[电子电信—通信与信息系统]