中国激光, 2018, 45 (10): 1006001, 网络出版: 2018-10-12
精跟踪中基于声光偏转器的本振光章动探测角度误差方法 下载: 797次
Angle Error Detection of Local Oscillator Nutation Based on Acousto-Optic Deflector in Fine Tracking System
光通信 相干 精跟踪 章动 角度误差 声光偏转器 optical communications coherence fine tracking nutation angle error detection acousto-optic deflector
摘要
在自由空间相干光通信的精跟踪系统中, 利用光纤章动或快反镜章动探测角度误差具有降低损耗、简化系统结构等优势, 但这两种方法都需要引入机械运动部件。为此, 提出了利用声光偏转器实现无机械扫描的信号光角度误差的提取方法, 建立了提取角度误差的理论模型, 分析了可能的误差来源, 搭建了一套验证探测角度误差的系统, 测量精度优于1/10信号光发散角, 不会影响后续的相干解调。
Abstract
In optical free space coherent communication fine tracking system, the advantage of using fiber nutation or fast steering mirror nutation to detect angle error is reducing losses and simplifying system and so on. However, they both need mechanically moving parts. This paper proposes detection method of the angle error of signal beam without mechanical nutation by acousto-optic deflector. Theoretical model of signal angle error detection is built and the possible error source is analyzed. Meanwhile, the verifying setup is built, and the precision is better than 1/10 angle divergence of signal, which can not affect the heterodyne detection.
贺红雨, 孙建锋, 侯培培, 张波, 许蒙蒙, 劳陈哲. 精跟踪中基于声光偏转器的本振光章动探测角度误差方法[J]. 中国激光, 2018, 45(10): 1006001. He Hongyu, Sun Jianfeng, Hou Peipei, Zhang Bo, Xu Mengmeng, Lao Chenzhe. Angle Error Detection of Local Oscillator Nutation Based on Acousto-Optic Deflector in Fine Tracking System[J]. Chinese Journal of Lasers, 2018, 45(10): 1006001.