Title :
Dynamic adaptive PMD compensation in a 40Gb/s OTDM system
Author :
Li Tangjun ; Wang Muguang ; Shuisheng, Jian ; Caiyun, Lou ; Li, Huo ; Hejun, Yao ; Ning TiGang ; Cao, Digo ; Xiangfeng, Gong ; Yongjun, Fu ; Zhongwei, Tan ; Liu Yan
Author_Institution :
Inst. of Lightwave Technol., Northern Jiaotong Univ., Beijing
Abstract :
An experiment of two-stages four degrees high-order polarization mode dispersion (PMD) compensation in 40 Gb/s optical communication system with a large PMD is reported. The former stage adopts polarization controller and fixed time-delayed line of polarization-maintaining fiber (PMF). The second stage consists of a polarization rotator and a tunable differential group delay (DGD) line that is based on magneto optical crystal. The second stage is used to compensate remnant first-order PMD. The PMD monitoring technique adopted degree of polarization (DOP) as error signal. A novel practical adaptive optimization algorithm was introduced in dynamic adaptive PMD compensation. Some experimental results show that large PMD is compensated by this compensator in a 40 Gbits/s non-return-to-zero (NRZ) OTDM transmission systems. A significant improvement of system performance can be achieved in the eye pattern of a received signal. Most first-order compensating ability of the compensator is 35 ps. Second-order compensating ability of the compensator is 200 ps2 . The optimum compensating time is within several milliseconds
Keywords :
delay-differential systems; monitoring; optical fibre communication; optical fibre dispersion; optical fibre polarisation; optimisation; time division multiplexing; 40 Gbit/s; OTDM transmission system; PMD monitoring technique; adaptive PMD compensation; adaptive optimization algorithm; degree of polarization; fixed time-delayed line; four degrees high-order polarization mode dispersion; magneto optical crystal; nonreturn-to-zero; optical communication system; polarization controller; polarization rotator; polarization-maintaining fiber; tunable differential group delay; Communication system control; Internal stresses; Manufacturing; Optical distortion; Optical fiber cables; Optical fiber communication; Optical fiber polarization; Optical fiber subscriber loops; Optical fiber testing; Polarization mode dispersion;
Conference_Titel :
Communications Systems, 2004. ICCS 2004. The Ninth International Conference on
Conference_Location :
Singapore, China
Print_ISBN :
0-7803-8549-7
DOI :
10.1109/ICCS.2004.1359436
