半导体激光器实现波长变换的误码率特性分析

在半导体激光器实现波长转换的理论模型中引入互耦合系数, 根据改进后的波长转换模型, 得出了波长转换的误码率特性与理论模型中的互耦合系数的关系, 并进行了数值模拟和实验验证。数值模拟结果表明, 互耦合系数的大小取决于信号光和探测光功率及其波长间隔, 互耦合系数越大, 波长变换的误码率越小。理论与实验结果表明, 只有在大的信号光功率、小的探测光功率和较小波长间隔情况下, 即当互耦合系数取值较大时, 波长转换的误码率才能达到最小, 信号光功率的减小及探测光功率的偏大均会增大系统的误码率。

Analysis of Bit Error Rate in LD Wavelength Conversion

The mutual coupling parameter was introduced into the theoretical model of semiconductor laser wavelength conversion. Based on the improved theoretical model of wavelength conversion, the bit error rate versus mutual coupling parameter was given. The simulated results demonstrated that the mutual coupling parameter depended on the powers of signal and probe lights and the wavelength space between them. The higher the mutual coupling parameter, the less the bit error rate. It was also demonstrated that with higher signal power, lower probe power and lower wavelength space between them, which means larger mutual coupling parameter, the bit error rate of wavelength conversion is minimum, the decreasing of signal light and the increasing of probe light will increase the bit error rate.