分布反馈半导体激光器取样光栅特性分析  

Research on characteristics of distributed feedback semiconductor laser sampling gratings

作　　者：王文鑫 吕玉祥 WANG Wenxin;LV Yuxiang(Physics and Optoelectronic Engineering College,Taiyuan University of Technology,Jingzhong Shanxi 030600,China;Information Engineering College,Taiyuan University of Technology,Jingzhong Shanxi 030600,China)

机构地区：[1]太原理工大学物理与光电工程学院,山西晋中030600 [2]太原理工大学信息工程学院,山西晋中030600

出　　处：《激光杂志》2018年第10期57-60,共4页Laser Journal

基　　金：国家863计划课题(No.2015AA016901);山西省自然科学基金项目(No.2015011050)

摘　　要：为了改善传统分布反馈半导体激光器的单模特性和因激光腔端面AR涂层而导致制造工艺复杂的情况,需要引入取样光栅,这是一种不同于均匀光栅、λ/4相移光栅、周期光栅、对称光栅和非对称光栅等的新结构光栅,其可沿着激光腔的特定区域（此区域包含光栅）进行耦合。另外,借助传输矩阵法得到耦合模式方程,建立起分布反馈半导体激光器的取样光栅结构模型。并且从耦合系数、平坦度、阈值等多个方面对构建的模型进行仿真对比。分析仿真结果可知,采样光栅的引入,使激光器无需对端面AR涂层,即可消除相移等随机变量对激光器的影响。并且,在新结构中,无需考虑光栅相移以及光栅的完整性,进一步降低了激光器制备的复杂性。In order to improve the single model property of the conventional distributed feedback semiconductor laser and the manufacturing process the laser cavity face complexity of. Sampling gratings are introduced,which is a new structure that is different from uniform gratings,λ/4 phase shift gratings,periodic gratings,symmetric gratings,and asymmetric gratings. It can be performed along a specific area of a laser cavity（ the area contains a grating） to couple.In addition,with the help of the coupling mode equation obtained by the transmission matrix method,a sampling grating structure model of a distributed feedback semiconductor laser is established. And from the aspects of coupling coefficient,flatness,threshold,and other aspects of the model to conduct simulation comparison. The analysis of the simulation results shows that the introduction of the sampling gratings eliminates the need for the laser to coat the end face of AR and eliminates the influence of random variables such as phase shift on the laser. Meanwhile,in the new structure,the phase shift of the grating and the integrity of the grating don＇t need to consider,further reducing the complexity of laser preparation.

关 键 词：分布反馈 激光器 取样光栅 传输矩阵法 

分 类 号：TN248.4[电子电信—物理电子学]