平面镜半导体光束整形的设计优化与光纤耦合  

Design of two mirror beam-shaping and fiber coupling for diode bars

作　　者：杨欢[1,2] 周崇喜[1] 杜春雷[1] 谢伟民[1] 郑春艳[1] 

机构地区：[1]中国科学院光电技术研究所微细加工光学技术国家重点实验室 [2]中国科学院研究生院,北京100039

出　　处：《光电工程》2007年第8期32-36,共5页Opto-Electronic Engineering

基　　金：四川省青年科技基金资助项目

摘　　要：本文在光纤耦合理论分析的基础上,采用平面镜反射整形方法对半导体准直光束进行重排,提出了应用于半导体光束整形的整形器结构表达式。针对慢轴发散角较大引起整形次数增加和多次反射易损耗的特点,分析并优化平面镜的结构参数,设计了整形次数为13次的平面整形器,使得半导体激光器快、慢轴方向的光束实现光参数积均衡。通过对整个光学系统的模拟和实验,表明采用该方法能够实现条阵半导体激光耦合进入芯径200μm、数值孔径为0.22的光纤中,耦合效率接近50%。Optical shaping transform system was described by using fiber-coupled theory, the collimated beam was superposed by using two mirror reflect method, and the condition and structure expression of beam-shaper was given. Referring to increasing shaping-times caused by slow-axis divergence and losing power caused by multi-reflection, a beam-shaper of 13 times shaping was designed after analysis and optimization of shaper＇s structure. The balance of beam parameter products of diode＇s two directions was achieved, Simulation and experiment of optical system show that laser diode bar is coupled into a 200μm fiber with NA =0.22 and efficiency approximate 50%.

关 键 词：光纤耦合 光束整形 半导体激光器 平面镜 优化设计 

分 类 号：TN248.4[电子电信—物理电子学]