激光原理与技术课程虚拟仿真实验平台建设及教学实践  

The Development and Teaching Practice of the Visual Simulation Platform for Lasers Principe and Technology

作　　者：李琨 伍波[2] LI Kun;WU Bo(School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;College of Optoelectronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]电子科技大学光电科学与工程学院,成都610054 [2]成都信息工程大学光电工程学院,成都610225

出　　处：《实验科学与技术》2020年第4期147-152,共6页Experiment Science and Technology

基　　金：电子科技大学2017年度本科教学改革“实验课程资源”项目(2017XJYS28);电子科技大学2017年度本科教学改革“教学方法与考核方法改革示范课建设项目”(2017XJYJ-ZD12)。

摘　　要：对本科生开设的激光原理与技术课程包含激光基本原理、激光调制、调Q等内容,涉及多门基础学科。为了帮助学生理解复杂的原理,同时使课程更好地与工程实践结合,开发了虚拟仿真实验平台“Laser V−Lab”。虚拟仿真实验包含3个主要功能模块(激光产生、激光传输、激光控制),可对激光输出特性、激光谐振腔模式、激光调制、激光调Q、激光倍频等过程进行仿真计算。每个功能模块都可以由用户自行定义参数,计算结果可以显示并保存。给出了虚拟仿真软件在教学中的3个应用实例:对激光横模的形成过程及高阶横模的特性进行了演示;对Nd:YAG自由振荡激光器的输出特性进行了计算,演示了激光谐振腔输出耦合镜的反射率对激光弛豫振荡过程的影响;给出了采用ABCD矩阵方法的激光传输变换计算示例。教学实践结果表明,虚拟仿真实验的开展有助于提高学生的学习兴趣、培养工程实践能力及创新思维能力。The course Laser Principle and Technology for undergraduates is a multi-physics subject that covers laser’s basic principle,laser modulation techniques,Q-switching techniques,etc.A virtual simulation platform“Laser V-Lab”was developed to improve students’understanding of the complex theories and integrate theories with engineering practice.The platform consists of three main modules(laser generation,laser propagation and laser controlling),which can perform the simulation of laser output characteristics,laser transverse mode,laser modulation,Q-switching,frequency conversion,etc.Each function module has its input parameters which can be modified by the user and the calculation results can be displayed and saved.Three application examples are given:the forming process of laser transverse mode and the characteristics of high order transverse mode,influences of the output mirror’s reflectivity on the relaxation oscillation process,and the laser propagation calculation using ABCD matrix.Teaching practice shows that the virtual simulation software has increased students’interest in learning,cultivated their engineering practical ability and promoted their creative thinking.

关 键 词：虚拟仿真 弛豫振荡 速率方程组 龙格库塔算法 Fox-Li迭代 

分 类 号：G642.423[文化科学—高等教育学]