空间激光通信光学系统对信号光偏振特性影响研究

摘要

In coherent optical communication systems, optical polarization characteristics of the signal light and the local oscillator,this will change the polarization light signal,will affect the efficiency of coherent communication system. Sig-nal light through the space optical communication of optical system, through the optical component is not perpendicular to the incident, the space optical communication optical system modeling, simulation software the beam is obtained af-ter element polarization distribution characteristics in the system. Analyses the reason of change of polarization,and pro-vides a signal light at the end after the system of polarization changes and compensation method.%在相干光通信系统中，信号光与本振光的偏振特性的不一致会改变光信号的偏振态，会影响相干通信系统的效率。信号光经过空间光通信光学系统时，通过部分光学元件时并不是垂直入射，对空间光通信光学系统进行建模，利用仿真软件得到了光束经过系统中元件偏振态分布特性。分析产生偏振改变的原因，并在最后给出了信号光经过该系统后的偏振态改变量与补偿办法。