Dynamic PMD compensation in 40-Gb/s optical communication system  

作　　者：李唐军 王目光 简水生 娄采云 霍力 姚和军 宁提纲 崔杰 杨方成 刁操 龚向锋 傅永军 谭中伟 刘艳 

机构地区：[1]Institute of Lightwave Technology Beijing Jiaotong University, Beijing 100044 [2]Department of Electronic Engineering Tsinghua University, Beijing 100084

出　　处：《Chinese Optics Letters》2005年第5期264-267,共4页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 60177027 and 60377015) and the National "863" Project of China (No. 2001AA122042).

摘　　要：A 40-Gb/s optical time division multiplexing (OTDM) return-to-zero (RZ) transmission experiments including a dynamic polarization mode dispersion (PMD) compensation was reported. The dynamic PMD compensator is made up of two-stage four degrees of freedom (DOF). The first stage adopts polarization controller and fixed time-delayed line. The second stage is variable differential group delay (DGD) element. The PMD monitoring technique is based on degree of polarization (DOP) as error signal. A novel practical adaptive optimization algorithm was introduced in dynamic adaptive PMD compensation. The experimental results show that the performance of the PMD compensator is excellent for 40-Gb/s RZ transmission systems with the large DGD. With this compensator, a significant improvement of system performance can be achieved in the eye pattern of a received signal. The first-order compensating ability of the compensator is greater than 30 ps. The second-order compensating ability is greater than 200 ps2. The first-order optimum compensating time is within 10 ms. The second-order optimum compensating time is within 24 ms.A 40-Gb/s optical time division multiplexing (OTDM) return-to-zero (RZ) transmission experiments including a dynamic polarization mode dispersion (PMD) compensation was reported. The dynamic PMD compensator is made up of two-stage four degrees of freedom (DOF). The first stage adopts polarization controller and fixed time-delayed line. The second stage is variable differential group delay (DGD) element. The PMD monitoring technique is based on degree of polarization (DOP) as error signal. A novel practical adaptive optimization algorithm was introduced in dynamic adaptive PMD compensation. The experimental results show that the performance of the PMD compensator is excellent for 40-Gb/s RZ transmission systems with the large DGD. With this compensator, a significant improvement of system performance can be achieved in the eye pattern of a received signal. The first-order compensating ability of the compensator is greater than 30 ps. The second-order compensating ability is greater than 200 ps2. The first-order optimum compensating time is within 10 ms. The second-order optimum compensating time is within 24 ms.

关 键 词：Degrees of freedom (mechanics) Electromagnetic dispersion Error compensation Fiber optic networks Light polarization Optical communication equipment Time division multiplexing 

分 类 号：TN929.11[电子电信—通信与信息系统]