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首页> 外文会议>Optical Transmission, Switching, and Subsystems IV pt.1 >Comparison of different modulation formats for polarization mode dispersion compensators
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Comparison of different modulation formats for polarization mode dispersion compensators

机译：偏振模色散补偿器不同调制格式的比较

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摘要

We propose a polarization mode dispersion (PMD) compensation scheme for wavelength-division-multiplexing (WDM) system, in which two WDM channels share one PMD compensator at the receiver site. The effect of different modulation formats on multi-stage PMD compensators is studied and compared by numerical simulations in 40-Gb/s WDM optical fiber communication system. The degree of polarization (DOP) of single state of polarization (SOP) optical signal is used as the feedback signal in PMD compensators. The particle swarm optimization (PSO) algorithm is used as the searching algorithm in WDM systems. The compensated DOP values of return-to-zero (RZ) format and nonreturn-to-zero (NRZ) format by multi-stage PMD compensators have been increased distinctly compared to the corresponding cases without compensation. It is shown that the PSO algorithm is implemented successfully in adaptive multi-stage PMD compensation in a 40-Gb/s optical WDM system. The compensated eye diagrams for the two channels by multi-stage PMD compensators indicate that the three-stage PMD compensator which eliminates the influence of second-order PMD completely in WDM system takes the best efficiency in the multi-stage PMD compensators for RZ format and NRZ format.
机译：我们提出一种用于波分复用（WDM）系统的偏振模色散（PMD）补偿方案，其中两个WDM通道在接收器站点共享一个PMD补偿器。在40 Gb / s WDM光纤通信系统中，通过数值模拟研究并比较了不同调制格式对多级PMD补偿器的影响。偏振态（SOP）光信号的偏振度（DOP）用作PMD补偿器中的反馈信号。 WDM系统中使用粒子群优化（PSO）算法作为搜索算法。与没有补偿的情况相比，通过多级PMD补偿器补偿的归零（RZ）格式和不归零（NRZ）格式的DOP补偿值已明显增加。结果表明，在40 Gb / s光学WDM系统的自适应多级PMD补偿中成功实现了PSO算法。多级PMD补偿器对两个通道的补偿眼图表明，在WDM系统中，完全消除了二阶PMD影响的三级PMD补偿器在RZ格式的多级PMD补偿器中获得了最佳效率。 NRZ格式。

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