弱光反馈条件下的多外腔自混合干涉  

Self-Mixing Interference Effects in a Laser Diode with Multiple External Reflectors

作　　者：宦海 王鸣[1] 郝辉[1] 

机构地区：[1]南京师范大学物理科学与技术学院,南京210097

出　　处：《南京师大学报（自然科学版）》2003年第4期46-50,共5页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金 (No .5 0 0 6 5 0 0 2 );江苏省自然科学基金 (No .BK2 0 0 110 9)资助项目

摘　　要：针对弱光反馈的情形 ,运用薄膜干涉的理论 ,对弱光条件下的多外腔自混合干涉进行了分析 ,并基于含复合腔激光器结构 ,建立了理论模型 ,进行了理论分析及数据仿真 .研究的成果有助于研究光纤耦合的自混合干涉测量设备 .The self-mixing interference (SMI) signal is obtained by feeding the laser beam from an object back to the laser cavity, which can causes an intensity modulation of the laser output. The theory of the self-mixing effect has been extensively analyzed in the literature. The self-mixing interference effect in the LD with multiple external reflectors is analized and the analytical mode based on the compound cavity effect in lasers is present. The general expression of the threshold gain and frequency in the compound laser cavity is deduced and some simulation analysis at different conditions is made. This principle is used to analyze the fiber-coupled self-mixing system.

关 键 词：弱光反馈 多外腔自混合干涉 多外腔反馈 光纤耦合系统 薄膜干涉 复合腔激光器结构 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学] O436.1[机械工程—光学工程]