建立了当两输入光偏振方向不平行时半导体光放大器(SOA)中近简并四波混频(FWM)效应的宽带理论模型; 以基于SOA的近简并FWM型波长转换器为例, 通过数值模拟, 对两输入光偏振方向不平行时, 输入信号光、输入抽运光、两输入光之间的波长失谐量和偏振夹角对近简并FWM效应及波长转换特性的影响进行了理论研究。结果表明,对于输入信号光和抽运光来说存在着最佳功率值; 增大输入信号光波长失谐量, 转换效率随之下降; 随着两输入光偏振夹角的增大, 转换特性变差, 同时输出光的偏振角随两输入光偏振夹角的增大而增大。

A comprehensive broad-band dynamic model of nearly degenerate four-wave mixing (FWM) in semiconductor optical amplifier (SOA), in case of the polarization states of two input lights being not parallel, is presented. By numerical simulation, take the all-optical wavelength conversion based on nearly degenerate FWM in an SOA for an example, the effects of two input light powers, frequency detuning and polarization angle of two input lights on the nearly degenerate FWM and the performances of wavelength conversion are theoretically investigated. The results indicate that there exist the optimal powers of two input lights. As the frequency detuning between the two input signals and the polarization angle of two input lights increase, the conversion efficiencies are decreased. The polarization state of C13 becomes larger as the polarization angle of two input lights increases.