为了分析垂直腔半导体光放大器的调谐输出特性, 考虑到有源腔有效折射率和载流子浓度之间的关系, 并结合载流子速率方程, 采用建立腔内平均光子数与输入信号光功率之间的关系的研究方法, 对垂直腔半导体光放大器的调谐输出特性进行了理论分析和数值仿真。结果表明, 在一定的输入光功率和波长条件下, 可以观察到双稳现象; 双稳环的宽度随着输入光功率的变化先增大而后减小; 在一定的输入光功率下, 双稳环宽度随着抽运光功率的增大而增大; 对于波长大于中心波长的信号, 其增益在某些区域被放大。

Considering the relationship between the average photon and the input signal power, the output tune characteristics were analyzed and simulated based on the carrier density rate equation. The relationship between the cavity reflective index and carrier density was also taken into account. The bistable phenomena was obtained at certain input optical power and wavelength. The bistability loop width first increases and then discreases with input optical power. The bistability loop width increases versus pump optical power. The gain is magnified at certain area when the wavelength is bigger than center wavelength.