基于延时光电反馈控制两段式半导体激光器的双稳及自脉动特性  

Controlling the bistability and self-pulsation characteristics of two-segment bistable laser diode based on delayed optoelectronic feedback

作　　者：贾新鸿[1] 吴正茂[1] 林晓东[1] 柏熙[1] 夏光琼[1] 

机构地区：[1]西南师范大学物理学院,重庆400715

出　　处：《物理学报》2005年第8期3680-3687,共8页Acta Physica Sinica

基　　金：教育部科学技术重点项目(批准号:03140);重庆市自然科学基金(批准号:2003-7983)资助的课题.~~

摘　　要：提出一种将延时光电反馈引入两段式双稳半导体激光器(TBLD)的吸收区,从而达到控制其双稳及自脉动特性的方案.利用速率方程模型,分析了反馈增益及延迟时间对TBLD双稳及不稳定特性的控制作用.数值模拟的结果表明:TBLD的稳定区域随延迟时间呈周期性变化;双稳区域随延迟时间的增大而变窄;在一定的取值范围内,增大延迟时间有利于增强双稳的稳定性;负反馈更容易出现不稳定性.In this paper, the delayed optoelectronic feedback is introduced to the absorption region in order to control the bistability and self-pulsation characteristics of the two-segment bistable laser diode (TBLD). The rate equations have been used to model numerically the effects of feedback gain and delay time. The results show that the stable region of TBLD varies periodically with the delayed time; the bistable region shrinks with increasing delay time; the stability can be enhanced at certain values of delayed time, and the instability can be reached more easily for negative optoelectronic delayed feedback.

关 键 词：半导体激光器 脉动特性 两段式 双稳 反馈控制 延时 延迟时间 速率方程模型 周期性变化 光电反馈 稳定区域 数值模拟 控制作用 稳定特性 反馈增益 取值范围 不稳定性 吸收区 负反馈 增大 

分 类 号：TN248.4[电子电信—物理电子学] TU435[建筑科学—岩土工程]