中国激光, 2019, 46 (1): 0106002, 网络出版: 2019-01-27
相干光通信系统中光束的偏振控制及控制算法研究 下载: 873次
Polarization Control and Control Algorithm of Beams in Coherent Optical Communication System
光通信 相干光通信 偏振控制 单粒子优化算法 混频效率 中频信号 optical communications coherent optical communication polarization control single particle optimization algorithm mixing efficiency intermediate frequency signal
摘要
在相干光通信系统中, 由于大气湍流的影响, 信号光的偏振态具有不确定性, 而光混频器对信号光和本振光的偏振态比较敏感。结合光混频器原理推导出信号光偏振态、中频信号和混频效率三者之间的关系, 以中频信号幅值作为反馈控制信号光偏振态以提高混频效率, 并设计一种适用于相干光通信系统的单粒子优化算法。实验结果表明, 在闭环状态下, 偏振控制系统中频信号的幅值快速增大, 混频效率提升64%左右, 中频信号幅值的波动方差减小为0.001, 实现了相干光通信系统中的偏振控制。
Abstract
In coherent optical communication system, the polarization state of the signal light is uncertain because of the influence of atmospheric turbulence, and the optical mixer is sensitive to the polarization of signal light and local oscillator light. Based on the principle of optical mixer, the relationship among the polarization state of the signal light, the intermediate frequency signal and the mixing efficiency is deduced, The amplitude of the intermediate frequency signal is used as feedback control signal to increase the mixing efficiency, and a single particle optimization algorithm for coherent optical communication systems is designed. Experimental results show that in closed loop state, the amplitude of the intermediate frequency signal increases rapidly, the mixing efficiency increases about 64%, and the fluctuation variance of amplitude of intermediate frequency signal decreases to 0.001. The polarization control in the coherent optical communication system is realized.
马兵斌, 柯熙政, 张颖. 相干光通信系统中光束的偏振控制及控制算法研究[J]. 中国激光, 2019, 46(1): 0106002. Ma Bingbin, Ke Xizheng, Zhang Ying. Polarization Control and Control Algorithm of Beams in Coherent Optical Communication System[J]. Chinese Journal of Lasers, 2019, 46(1): 0106002.