半导体光放大器对超短光脉冲放大过程中载流子寿命的变化

Studies on the Changes of Carrier Lifetime During the Propagation of Ultra-Short Optical Pulses in Semiconductor Optical Amplifiers

修正了人们在研究半导体光放大器对光脉冲的放大这一动态过程中把载流子寿命取为常数这一处理方法 .通过考虑放大器中载流子的实际复合机制 ,提出了一个可研究载流子寿命变化的模型 .数值计算的结果表明 ,在半导体光放大器对超短光脉冲进行放大这一动态过程中 ,载流子寿命变化明显 。

The constant carrier lifetime assumption in the time dependent rate equations, which is used to study the dynamic response of semiconductor optical amplifier to ultra short optical pulse, has been modified, and a treatment method about the carrier lifetime is presented. The results show that carrier lifetime will change during the dynamic response of semiconductor optical amplifier to ultra short optical pulse, and the variation of the carrier lifetime relates to the shape of the input optical pulse.