辅助光注入下半导体光放大器的快慢光性能

随着全光网络的快速发展，快慢光技术受到了广泛关注。为了研究半导体光放大器(SOA)的快慢光效应，文章构建了辅助光注入半导体光放大器的理论模型。比较了辅助光注入SOA前后，直流电流、调制电流、调制频率、相移以及增益系数等参数对相位延时量的影响。仿真结果表明：辅助光的注入使输出信号光由慢光变为快光，辅助光功率越强，效果越明显。同时，注入辅助光信号后，直流电流越大，相位延时量越大；调制电流、调制频率、相移及增益系数越大，相位延时量越小。

Performance of Fast and Slow Light in Semiconductor Optical Amplifier under Assist Light Injection

With the rapid development of all-optical networks, fast and slow light technology has gained widespread attention. In this paper, a theoretical model of assist light injection into semiconductor optical amplifier (SOA) was constructed to study the fast and slow light effect. The effects of the gain coefficient and the magnitude of DC current, modulation current, modulation frequency and phase shift on the phase delay with and without the injection of assist light were compared. The simulation results show that the output signal light changes from slow light to fast light under the injection of assist light, and the stronger the assist light power, the more obvious the effect. Meanwhile, it can be observed that after the injection of the assist light signal, the larger the DC current, the larger the phase delay. On the contrary, the larger the modulation current, modulation frequency, phase shift and gain coefficient, the smaller the phase delay.