基于球差选模的激光器横模特性实验  

Laser transverse mode characteristic demonstration based on mode-selecting via spherical aberration

作　　者：盛泉[1,2] 钟凯[1,2] 李吉宁 徐德刚[1,2] 史伟[1,2] 姚建铨[1,2] SHENG Quan;ZHONG Kai;LI Ji-ning;XU De-gang;SHI Wei;YAO Jian-quan(School of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-Electronics Information Technology of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津大学光电信息技术教育部重点实验室,天津300072

出　　处：《物理实验》2022年第4期36-40,共5页Physics Experimentation

基　　金：天津大学研究生创新人才培养项目(No.YCX202031)。

摘　　要：开发了面向光电子专业高年级本科生的基于球差选模的固体激光器横模特性实验系统,在激光谐振腔内使用短焦距透镜引入球差,使具有不同光斑尺寸的各阶横模的空间光路发生分离,从而便捷地实现对不同阶数横模的选择和切换.该实验系统综合激光原理中的腔模理论和几何光学中的像差理论,学生可以直观地观察到透镜的球差对激光器工作状态的影响和稳定的高阶横模图像;通过定性和定量分析,直接体现球差、激光器的模式匹配、谐振腔的稳区、激光的横模等重要知识点及其对激光器工作状态的影响.同时该实验提高了学生在激光器调试准直和工具软件使用方面的实践技能.A solid-state laser transverse mode experimental system based on spherical aberration selection was developed for senior undergraduates majored in opto-electronics.By introducing strong spherical aberration with a short-focal lens in the laser cavity,the light paths of the different orders of transverse modes were spatially separated,the selection and switching of transverse modes of different orders could be realized.The experimental system integrated the cavity mode theory in the laser principle and the aberration theory in geometric optics,so that the influence of the spherical aberration of the lens on the working state of the laser and the stable high-order transverse mode image could be observed intuitively.Through qualitative and quantitative analysis,the important points such as spherical aberration,mode matching of lasers,stable region of resonators,transverse modes of lasers and their effects on the working state of lasers could be directly depicted.With this experimental teaching system,students’practical skills in laser adjustment,alignment and use of tool software had been improved.

关 键 词：固体激光器 球差 激光横模 

分 类 号：TN248.1[电子电信—物理电子学]