中文摘要：

采用半导体光放大器（SOA）级联滤波器的方案可以实现高速全光波长转换，其中，滤波器实质上是对SOA输出信号的光谱进行优化操作. 文中利用带通滤波器（BPF）和延时干涉仪（DI）组成的光谱优化器，不仅实现了80 Gbit/s同相波长转换，而且基于遗传算法设计光谱优化器的参数，极大地提高了输出信号的质量. 同时，也从理论上分析了SOA中超快带内效应对信号光谱的影响以及光谱优化器中BPF和DI的消光比对输出信号质量的影响.

英文摘要：

A single semiconductor optical amplifier （SOA） assisted by optical filter is exploited to realize high-speed all-optical wavelength conversion, in which, the filter is employed to optimize output spectrum. We propose a spectrum optimizer which contains a band pass filter （BPF） and a delay interferometer （DI）. Based on this configuration, 80 Gbit/s all-optical non-inverted conversion has been numerically simulated. Furthermore, the quality of output signal has been improved greatly using genetic algorithms to optimize the parameters of the spectrum optimizer. Additionally,the effect of ultra-fast carrier dynamics in SOA on the output signal is analyzed theoretically. The dependence of the signal extinction ratio （ER） and pattern effect （PE） on variations of the BPF’s ER and DI’s ER is also studied.