10Gb/s全光3R再生的研究

Research on 10 Gb/s All-Optical 3R Regeneration

报道了对10 Gb/s恶化数据信号的全光3R(再放大、再定时、再整形)再生的实验研究。针对利用基于半导体光放大器的注入锁模环形激光器进行时钟恢复时的码型效应问题,提出了利用梳状滤波器对信号进行预处理。利用这个技术极大的减小了由于码型效应造成的时钟信号的幅度和时间抖动,从恶化的数据信号中恢复出无码型效应的高质量光时钟脉冲。信号整形的关键是光判决门,性能良好的判决门可以进一步提高信号的消光比、减小抖动。研究了基于电吸收调制器的信号再整形。利用上述器件构成的 3R再生器,实现了 10 Gb/s恶化信号的全光3R再生。

Experimental studies on 10 Gb/s 3R degraded data regeneration were reported. A method of preprocessing the data signals using comb-like filter was proposed in order to overcome the pattern effect in the clock recovery using injection mode-locked ring laser based on semiconductor optical amplifier (SOA). The amplitude fluctuation and timing jitter caused by the pattern effect in clock pulses were greatly reduced. Furthermore, it was also demonstrated that clock could be recovered from the badly degraded signals. The recovered optical clock from degraded signals is shown to be free of pattern. The core of optical reshaping is a decision gate featuring signal extinction ratio enhancement and noise reduction. The reshaping based on an electroabsorption modulator was also studied. With this technology all-optical 3R regeneration was achieved from 10 Gb/s degraded data.