基于半导体光放大器光判决门的光2R再生研究

Investigation of All Optical 2R Regeneration Based on Semiconductor Optical Amplifier

数值仿真半导体光放大器(SOA)-延迟干涉仪(DI)光判决门的功率传输曲线,给出在40Gb/s速率以下SOA-DI光开关的再生特性,进行了10～40Gb/s恶化信号的再生实验验证。由于SOA的交叉增益调制(XGM)极度依赖于载流子的恢复时间,在高速时,基于SOA的XGM效应的反逻辑信号存在明显的码型效应,提出基于SOA的瞬时交叉相位调制效应结合交叉增益压缩(XGC)效应的全光2R(再放大、再整形)再生方案,实现了100Gb/s的归零(RZ)信号的全光2R再生。

Power transfer function of a 40-Gb/s 2R （re-amplification and reshaping） regenerator consisting of a semiconductor optical amplifier （SOA） and a delay interferometer （DI） is culculated numerically, and the regeneration performance of the SOA-DI optical gate for the degraded signals at 10 ～ 40 Gb/s is experimentally investigated. Because the cross gain modulation （XGM） effect in a SOA depends on the carrier recovery time, inverted logical signal based on XGM experiences severe pattern effect at XGM-SOA-cross gain compression （XGC） regenerator. A novel all-optical 2R regeneration scheme by combining the transient cross phase modulatioa and XGC effects in SOA is proposed and it successfully demonstrates all-optical 2R regeneration for 100-Gb/s return-to-zero （RZ） signal.