偏振模色散对线性系统脉宽的影响  

Impacts of Polarization Mode Dispersion on the Pulse Width in Linear Systems

作　　者：郑远[1] 李朝阳[1] 刘秀敏[1] 李锡忠[1] 李荣华[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123信箱,北京100876

出　　处：《中国激光》2002年第10期900-904,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金 (编号 :6 0 0 72 0 4 2 );教育部博士点基金;北京邮电大学校基金资助项目

摘　　要：研究了线性系统中偏振模色散对均方根脉宽的影响。考虑了光源初始啁啾的作用 ,推导出均方根脉宽的解析表达式 ,分析表明 :二阶偏振模色散对脉冲展宽的作用与群速度色散及啁啾有关 ,一阶偏振模色散的作用则与这两者无关。以啁啾高斯脉冲为例 ,推导出一阶偏振模色散补偿前、后均方根脉宽的解析表达式 ,结果表明 ,适当选择群速度色散和初始啁啾参数 ,可以有效地抑制偏振模色散的展宽效应 ;与主态传输法比较 。The impacts of polarization mode dispersion (PMD) on the pulse-width in linear systems have been investigated. The analytical solutions, including the effects of initial frequency chirp, are derived. The results show that the broadening effects induced by the first-order PMD are independent on group velocity dispersion (GVD) and chirp, which are different from the effects induced by the second-order PMD. An initially chirped Gaussian pulse is taken as an example. Analytical solutions of rms pulse width are obtained before and after first-order PMD compensation. It is shown that the broadening effects will be suppressed effectively by appropriately choosing GVD and chirp parameter; the post-transmission compensation method will be less efficient than the PSP-transmission method due to chirp.

关 键 词：线性系统 偏振模色散 均方根脉宽 群速度色散 啁啾 光纤通信 

分 类 号：O436.3[机械工程—光学工程] TN929[理学—光学]