通信系统中光信噪比和偏振模色散的同时监测  

Simultaneous monitoring of optical signal-to-noise ratio and polarization mode dispersion in communication system

作　　者：陈颖[1] 吴希军[1] 徐晓晖[1] 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004

出　　处：《仪器仪表学报》2006年第z3期2014-,2029,共2页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(60377002)资助项目

摘　　要：提出了一种用偏振扰频和偏振光分束相结合实现光信噪比和偏振模色散同时监测的简便方法,通过测量两正交偏振测量臂中的偏振信号的光功率和消偏的背景噪声得到光信噪比(OSNR)和偏振模色散(PMD)。监测得到的OSNR和PMD是相互独立的,从而使得网络操作者能够区分传输链路中光噪声和偏振模色散的影响。对20 Gb／s的传输链路的实验表明, OSNR的变化范围在18～36dB,PMD值的变化范围为0～73ps。A simple method is proposed to monitor both optical signal-to-noise ratio (OSNR) and polarization mode dispersion (PMD) simultaneously using polarization-scrambling and polarization beam splitting in this paper. OSNR and PMD are obtained from the measurement of the two orthogonal polarization arms. Monitored OSNR and PMD are independent of each other, which will enable network operators to determine separately the contribution of optical noise and PMD along the transmission link. The results of the experiment are demonstrated in 20Gb/s transmission link with OSNR from 18 to 36dB and PMD from 0 to 73ps.

关 键 词：光纤通信 偏振模色散 光信噪比 偏振度 

分 类 号：TH7-55[机械工程—仪器科学与技术]