PMD对偏振分光OSNR监测方法的影响  

Effects of PMD on OSNR Monitoring Based on Polarization-nulling Method

作　　者：董红军[1] 张引发[1] 

机构地区：[1]西安通信学院光通信实验室,陕西西安710106

出　　处：《半导体光电》2008年第1期102-104,109,共4页Semiconductor Optoelectronics

基　　金：部级基金项目

摘　　要：偏振模色散(PMD)引起的传输信号去偏是造成偏振分光法监测光信噪比(OSNR)准确性下降的主要因素。研究了偏振模色散对信号和放大的自发辐射(ASE)噪声功率测量的影响,推导得出了误差计算公式并通过仿真实验得到验证。理论分析和仿真实验结果均表明:测量误差随着PMD的增大而增大,当差分群时延(DGD)为80 ps时,误差达4.5 dB;测量误差还随着系统传输速率和信道自身光信噪比的提高而变大。The accuracy of optical signal to noise ratio（OSNR）measurement based on the polarization-nulling method could be degraded significantly when the signal is significantly depolarized by polarization-mode dispersion （PMD）. The effect of PMD on signal and power measurement of ASE noise was investigated. The formula of measurement error was educed and proved by simulating. The result of theoretically analyses and simulation experiment shows that the OSNR monitoring error increases with PMD, when the differential group delay（DGD） is 80 ps, the maximum error is measured to be about 4. 5 dB; the error is also dependent on the channel＇s OSNR and transmission speed.

关 键 词：光性能监测 光信噪比 偏振模色散 放大的白发辐射噪声 

分 类 号：TN929.11[电子电信—通信与信息系统]