利用较完善模型研究半导体光放大器对皮秒光脉冲的放大  

Studies on the amplified picosecond optical pulse by semiconductor light amplifiers using an improved model

作　　者：夏光琼[1] 吴正茂[1] 林恭如[2] 

机构地区：[1]西南师范大学物理系,重庆400715 [2]台湾交通大学光电工程研究所

出　　处：《物理学报》2004年第2期490-493,共4页Acta Physica Sinica

基　　金：教育部科学技术重点项目 (批准号 :0 3 14 0 );重庆市应用基础研究项目资助的课题~~

摘　　要：提出了一个描述半导体光放大器 (SLA)对皮秒脉冲的放大这一物理过程的较为完善的物理模型 ,并数值分析了光脉冲经SLA放大后的上升时间和下降时间 .结果表明 :随着SLA偏置电流的增大 ,上升时间将缩短而下降时间将延长 ;输入脉冲的大峰值功率将加速上升时间的缩短和下降时间的延长 ;增益压缩对脉宽为几个皮秒的输入脉冲的上升时间和下降时间有明显的影响 ,而对脉宽为几十皮秒的输入脉冲可近似认为没有影响 ;After presenting an improved theoretical model that describes the dynamic process of optical pulses amplification by the semiconductor light amplifiers (SLAs), both the rising and falling time of amplified picosecond optical pulses by the SLAs have been investigated numerically. The results show that with the increase of the bias current of SLAs, the rising time will decrease and the falling time increase; the input pulse with a large peak power will accelerate the rising time shortening and the falling time lengthening; the gain compression has an obvious influence on the rising and falling time for several picosecond-width input pulses and gives approximately no effect on the input pulses in the tens of picosecond range; the gain asymmetry and shift strongly affect the rising and falling times.

关 键 词：半导体光放大器 皮秒光脉冲 上升时间 下降时间 偏置电流 增益压缩 增益非对称 光纤通信 

分 类 号：TN722[电子电信—电路与系统] TN929.11