基于液晶光调制器的星际激光通信平台振动补偿系统

Space Laser Communication Vibration Compensation System Based on Liquid Crystal Light Modulator

为了有效地补偿平台振动对星际激光通信系统的影响，设计并构建了基于反射式液晶光调制器的星载平台振动补偿系统。与传统振动补偿系统相比，该系统具有无机械结构、指向精度高、可对高阶像差进行补偿、体积小、重量轻、功耗低等优点，可以解决传统补偿方法的诸多问题。实验结果表明：对于振幅在10grad以下、振动频率在lO～100Hz之间的振动，该振动补偿系统的补偿因子高于0．8，系统残余误差小于2μrad，满足星际激光通信系统的高动态跟踪精度要求。

In order to compensate the influence on the inter-satellite laser communication system caused by the vibration of the satellite platform, a space-borne platform vibration compensation system is designed and constructed based on the reflection liquid crystal light modulator. Compared with the traditional vibration compensation system, it has the advantages of non-mechanical structure, high pointing accuracy, small volume, light weight, low power consumption and compensation for the higher-order aberration, so that many problems of the traditional compensation method can be overcome. As shown in the experimental results, the compensation factor is better than 0.8, and the residual error is less than 2 μrad when the frequency of angular vibration ranges from 10~100 Hz and the amplitude is lower than 10 μrad, which meet the high dynamic accuracy demands of inter-satellite laser communication system.