半导体激光器线宽展宽因数的估计方法  

An Approach for Measuring Parameters of Semiconductor Lasers

作　　者：禹延光[1] 闫艳霞[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450052

出　　处：《激光与红外》2006年第2期114-117,共4页Laser & Infrared

基　　金：河南省科委科技攻关项目资助(042420178);国家自然科学基金资助(60178039)。

摘　　要：描述了一种利用光反馈自混合效应估计半导体激光器的线宽展宽因数α和光反馈水平因子C的方法,该方法采用一个弱光反馈机制下的自混合效应模型去最佳拟合所观测的自混合信号数据,拟合算法基于非线性最小二乘法。针对不同的情况,做了大量计算机仿真,给出了仿真结果,结果表明该算法参数估计精度较高,不受参数初值选取的影响,且抗噪性能较好。An approach for measuring the linewidth enhancement factor α of semiconductor lasers and optical feedback level factor C is presented, and the method is based on the optical feedback self-mixing effect. The proposed method estimates the parameters α and C using a self-mixing model operating at a weak feedback region to best fit the observed self-mixing signal. The data fitting algorithm is based on the nonlinear least squares method. A lot of computer simulations are done based on different condition. Results showed that this algorithm is not affected by initial values. The parameters estimation accuracy is high, and the antinoise capability is good.

关 键 词：线宽展宽因数 光反馈 自混合干涉 最小二乘法 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学]