半导体光放大器增益及发光特性的理论研究

半导体光放大器(SOA)的非线性特性在光开关、波长变换、光逻辑运算中有重要的应用.研究了注入电流、入射光波长及SOA有源区长度对SOA增益和发光功率的影响.数值模拟结果表明:注入电流的增加,会引起载流子浓度的增加,且使SOA增益趋于饱和的速率加快;不同的SOA模型存在一个最佳输入光波长,在此波长附近有较好的增益特性;加长半导体光放大器有源区长度可获得更大增益,同时提高了器件的响应速率.

Gain and Luminescent Characteristics of Semi-Conductor Optical Amplifier

The nonlinear characteristics of semiconductor optical amplifier (SOA) have important applications for the all-optical switching, wavelength conversion, and optical logic gate. Detailed study has made on the effect to gain and emission power by the injection current, optical wavelength and the length of active region. Numerically simulation shows that the carrier density in the SOA increases with the increase of the injection current, at the same time, the rate of saturation increases. There is an optimal input light wavelength in the SOA model, and a optimal gain characteristic near the wavelength. In addition, high gain and fast response can be obtained by increasing the length of the active region of SOA.