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偏振模色散(PMD)是高速光通信的主要技术限制。为了处理PMD造成的光信号恶化,该文采用了同步调制再生的方法,从理论上分析了同步调制再生的PMD容限,证明在装置参数不变的情况下,可再生群时延差(DGD)值在0～35ps之间变化的PMD恶化信号;通过调整参数,可再生DGD值高达50ps的PMD恶化信号。在实验上用同步调制的方法实现了DGD值在0～35psPMD恶化10Gb/s归零码信号的再生。结果表明该方法勿需准确测量PMD值,响应速度与光信号传输速度相同,没有滞后现象,能应用于较大范围内PMD恶化信号的自动恢复。
Polarization mode dispersion (PMD) is a major technical limitation of high-speed optical communications. In order to deal with the deterioration of optical signals caused by PMD, the method of synchronous modulation regeneration is adopted in this paper. The PMD tolerance of synchronous modulation regeneration is theoretically analyzed. It is proved that the device reproducibility delay (DGD ) PMD deterioration signal with a value varying between 0 and 35 ps; PMD deterioration signal with DGD value up to 50 ps can be regenerated by adjusting parameters. Experiments using synchronous modulation method to achieve the DGD value of 0 ~ 35psPMD deterioration 10Gb / s return to zero signal regeneration. The results show that this method does not need to accurately measure the PMD value, and the response speed is the same with the optical signal transmission speed. There is no hysteresis and it can be applied to automatic recovery of PMD deteriorating signals in a wide range.