高速光通信系统中的偏振模色散监测和补偿

为了补偿高速光通信系统中偏振模色散（PMD），理论分析了以偏振度（DOP）作为PMD监测信号的原理；采用DOP监测法设计并实现了高精度和高响应速率的PMD实时在线监测单元，输入光功率范围为-20~0dBm，响应时间为1μs，监测精度为1%；使用PMD监测单元进行了43Gbit/s归零码光差分正交相移键控系统PMD自适应补偿实验. 实验结果表明，PMD自适应补偿系统可在1ms内完成PMD的跟踪补偿，补偿效果良好.

PMD Monitoring and Compensation in High Speed Optical Communication Systems

In order to compensate polarization mode dispersion (PMD) in high speed optical communication systems, an analysis of the principle of PMD monitoring with degree of polarization （DOP） as monitoring signal is proposed. Utilizing DOP method, a high precision and high response rate real time inline PMD monitoring unit is designed and implemented. The range of input optical power is -20~0dBm, the response time reaches 1μs and the detection accuracy is 1%. An experimental system is set up to adaptively compensate the PMD of 43Gbit/s return to zero differential quadrature phase shift keying system with PMD monitoring unit. Experiments show that the adaptive PMD compensation can be completed in 1 ms and the compensation effect is significant well.