作为自动交换光网络中的核心器件,全光波长转换器在网络中发挥着重要作用。基于半导体激光器速率方程,提出了新的基于饱和吸收体实现全光波长转换器的理论模型;并针对该理论模型,采用小信号分析方法讨论了波长转换的频率调制响应特性;数值求解了不同偏置电流、码速、输入信号光功率对波长转换性能的影响,对于实现和优化基于饱和吸收体的全光波长转换器有理论指导作用。 As the core device in the auto-switching optical network, the all-optical wavelength converter plays an important role in the network. Based on the rate equation of semiconductor laser, a new theoretical model based on saturable absorber for realizing all-optical wavelength converter is proposed. According to this theoretical model, the frequency-modulated response of wavelength conversion is discussed by small signal analysis method. The effects of setting current, code speed and optical power of input signal on wavelength conversion performance have theoretical guidance for realizing and optimizing all-optical wavelength converter based on saturable absorber.