一种提高40Gb/s非归零码系统中偏振度椭球对偏振模色散灵敏度的新方法  

A Novel Method of Improving the Sensitivity of DOP Ellipsoid on the Polarization Mode Dispersion in 40 Gb/s NRZ Systems

作　　者：郑远[1] 杨伯君[1] 张晓光[1] 

机构地区：[1]北京邮电大学理学院物理部,北京100876

出　　处：《中国激光》2003年第12期1090-1094,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金 (项目编号 :6 0 0 72 0 4 2 );国家 86 3计划 (项目编号 :2 0 0 1AA12 2 0 4 1);教育部博士点基金;北京邮电大学与世维通基金资助项目

摘　　要：提出了利用光带阻滤波器提高 4 0Gb/s非归零码系统中偏振度椭球对偏振模色散灵敏度的方法 ,数值研究了不同滤波器带宽对偏振度椭球三个轴长度的影响。结果表明 ,加滤波器后偏振度椭球对差分群时延和主态旋转率的敏感度明显提高 ,考虑到滤波器引入的损耗 ,提出了在最大差分群时延为 2 0ps时滤波器的带宽应限制在 10GHz以下。另外 ,数值结果还表明在滤波器带宽为 10GHz时 ,小于 4 0ps2A novel method is proposed to improve the sensitivity of DOP (degree of polarization) ellipsoid on the polarization mode dispersion (PMD) in 40 Gb/s non-return-to-zero (NRZ) systems by using optical bandstop filters. The effects of filter′s bandwidth on the three axes of DOP ellipsoid are investigated numerically. The results show that the sensitivity of DOP ellipsoid on differential group delay (DGD) and principal state of polarization (PSP) rotation rate is greatly improved by using a filter. Considering the loss induced by the filter, the bandwidth of the filter should be limited under 10 GHz when the maximum DGD is equal to 20 ps. Additionally, the results also show that the polarization dependent chromatic dispersion (PCD) which is smaller than 40 ps 2 has less effects on the three axes of DOP ellipsoid when the bandwidth of a filter is equal to 10 GHz.

关 键 词：光纤通信技术 偏振模色散 光带阻滤波器 偏振度椭球 

分 类 号：TN929.11[电子电信—通信与信息系统]