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《中国工程科学》 >> 2002年 第4卷 第11期

偏振模色散对高速光码的影响

东南大学电子工程系,南京 210096

资助项目 :国家自然科学基金资助项目(60272048) 收稿日期: 2002-02-18 修回日期: 2002-06-27 发布日期: 2002-11-20

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摘要

研究一阶、二阶偏振模色散(PMD)对10 Gb/s和40 Gb/s的光传输系统性能的影响,考虑PMD的统计特性,基于基本偏振态(PSP)理论数值模拟了非归零码(NRZ)和归零码(RZ)在传输过程中产生的脉冲畸变以及系统Q值的变化。结果表明,传输速率越高PMD对系统性能的影响越显著,二阶PMD也将不可忽略。另外,RZ码传输性能明显优于NRZ码并且可通过预啁啾进行改善。

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