用于高速光纤通信PMD补偿的光偏振度检测  

DOP detection for polarization mode dispersion in optical fibre communications

作　　者：王剑[1] 于晋龙[2] 

机构地区：[1]天津大学精仪学院,天津300072 [2]天津大学电信学院,天津300072

出　　处：《仪器仪表学报》2006年第z2期1165-1166,共2页Chinese Journal of Scientific Instrument

基　　金：天津大学青年教育基金资助项目

摘　　要：光偏振度(DOP)可以作为偏振模色散(PMD)补偿的反馈控制信号。利用准单色光的Jones矩阵和偏振度(DOP)的定义与斯托克斯参数之间的关系,给出了光纤中光在快慢轴之间两光场分量之间的归一化相关函数的表示式,推导了DOP与差分群延迟(DGD)的数学关系,以及与光信号脉冲宽度之间的关系。给出了当脉冲波形函数为高斯脉冲时的DOP表示式和任意光脉冲形状下的表达式,计算了在不同高斯脉冲宽度下DOP随DGD变化的关系曲线。利用光偏振检测模块测量光的斯托克斯参数和和模块提供的参数校正矩阵计算得到信号的光偏振度,实验测量了10Gbit／s伪随机序列在归零码(RZ)和非归零(NRZ)的DOP随DGD变化的曲线。Degree of polarization (DOP) can be taken as a feedback control signal in polarization mode dispersion compensation. With a mono-chromatic light assumption and therelation between degree of polarizationand Stocks parameters, a normalized coherent coefficientbetween the principal states of polarization is given. A mathematical relationship of degree of polarization with a pulse width and differential group delay (DGD) is derived. DOP expression is simplified when a pulse function is substituted by a Guassian pulse. Curves of theoretical calculations for DOP versus DGD under different pulse widths are given. DOP can be calculated by using measuring Stocks parameters and a corrective matrix provided with the polar-meter. Experimentsare done using a polar-meter for measuring the degree of polarization of a 10Gbit/s RZand NRZ pseudorandom sequence. Comparisonsbetween theoretical calculationsand experimental resultswere also made and they match well.

关 键 词：光纤通信 偏振模色散 偏振度 差分群延迟 

分 类 号：TH7-55[机械工程—仪器科学与技术]