热透镜效应及其焦距测量研究  

Research on Thermal Lensing Effect and Focal Length Measurement

作　　者：李春威 韩太坤 郑晓艳 庄海宁 蔡汝敏 吴伟韩 陶磊明 LI Chunwei;HAN Taikun;ZHENG Xiaoyan;ZHUANG Haining;CAI Rumin;WU Weihan;TAO Leiming(College of Science, Guangdong University of Petrochemical Technology, Maoming 525000, China)

机构地区：[1]广东石油化工学院理学院,广东茂名525000

出　　处：《广东石油化工学院学报》2020年第3期65-69,共5页Journal of Guangdong University of Petrochemical Technology

基　　金：广东石油化工学院人才引进项目(2019rc019)。

摘　　要：在激光器的设计和应用中,需要考虑热透镜效应影响,然而准确测出低功率激光器的热透镜焦距是研究难点。本实验选用低功率He-Ne激光器,通过研究放大光斑的光强变化观察热透镜效应,并推导出热透镜焦距的公式。对比丙酮和乙醇溶剂,观察发现丙酮具有更明显的热透镜效应,测试计算丙酮的热透镜焦距为-1.6 m。研究有助于改进低功率激光器的设计,从而降低热透镜效应的影响,提高激光器的性能。In the design and application of lasers,the effects of thermal lens effects need to be considered,and it is difficult to accurately determine the thermal lens focal length of low-power lasers.In this experiment,a low-power He-Ne laser is selected.The thermal lens effect is observed by studying the change in the light intensity of the amplified spot,and the formula for the focal length of the thermal lens is derived.Comparing acetone with ethanol solvents,it is observed that acetone has a significant thermal lens effect.The thermal lens focal length of acetone is calculated to be 1.6 m.This research contributes to the design improvement of low-power lasers,thereby reducing the effects of thermal lens effects and improving laser performance.

关 键 词：HE-NE激光器 热透镜效应 热透镜焦距 丙酮 

分 类 号：TN248[电子电信—物理电子学]