摘要
利用半导体激光器的Lang-Kobayashi方程,对半导体激光自混合干涉系统的动力学特性进行了仿真分析。研究结果表明,当光反馈系数较小时,激光器处于稳定状态,外腔长度不影响系统的稳定性;当光反馈系数较大时,激光器将进入不稳定状态,对于不同的外腔长度,激光器的稳定状态将发生变化。为实现大量程的位移或距离测量,光反馈系数必须足够小才能保证在较大外腔长度变化范围内,激光器始终处于稳定状态。
Using the Lang-Kobayashi equation of the semiconductor lasers, the simulation analysis is given for the dynamic characters of a self-mixing interference system with a laser-diode. It is demonstrated experimentally that semiconductor laser with weak optical feedback, whose external-cavity length hardly makes no influence on the system stability, will be in a state of stability; whereas in case of strong optical feedback, it＇s state will be in reverse and the capability of that stability will change with the length of external-cavity. To achiever a large range of measurement for displacement or distance, the optical feedback strength should be as little as possible, which make sure the laser in the state of stability within a large changes range of external-cavity length.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2008年第3期414-415,418,共3页
Optical Technique
基金
上海市重点学科建设资助项目(T0501)
