摘要
在以信号偏振度(DOP)作为反馈信号的偏振模色散补偿系统中,提出了分别利用带通和带阻滤波器来改进 反馈信号的灵敏度和监测窗口的方法。比较了40Gbit/s归零(RZ)码传输系统和10Gbit/s非归零(NRZ)码传输 系统中滤波器在改进反馈信号监测性能方面的作用,对滤波带宽的选择作了定性的数值分析。结果表明,通过滤 波器的引入,可在很大范围内避免补偿算法在搜索中出现局部极值的可能,减少了迂回搜索,改进了补偿效果,同 时有利于补偿系统的稳定。
The monitoring performance of monitor window and degree of polarization (DOP) sensitivity to differential group delay (DGD) can be improved greatly by using the band-pass and band-reject filters presented in the polarization mode dispersion (PMD) compensation system, where the DOP is used for the feed back signals. A comparison is made for the filters in improving the monitoring performance of the feed back signals between the 40 Gbit/s return-to-zero (RZ) and 10 Gbit/s nonreturn-to-zero (NRZ) transmission system, and numerical analysis is made for the selection of the bandwidth of the filters. The results showed that the local extremum can be avoid in the searching process of the searching algorithm, so a bypass searching is reduced greatly, which is significant for the compensation effects and the stabilization of the system.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2005年第1期79-82,共4页
Chinese Journal of Lasers
基金
国家973计划项目(2003CB314901)
国家863计划项目(2003AA311070)
国家自然科学基金(60077026)资助项目
关键词
光通信
偏振模色散补偿
偏振度椭球
Bandpass filters
Electromagnetic dispersion
Error compensation
Light polarization
Optical fibers
State feedback
