大学物理 ›› 2021, Vol. 40 ›› Issue (4): 79-.doi: 10. 16854 / j. cnki. 1000-0712. 200306

• 大学生园地 • 上一篇    下一篇

低功率激光热透镜效应的模拟及研究

郭政鑫,高绮妮,范紫萍,陈清楠,郑博为,彭 力   

  1. 1. 华南师范大学 物理与电信工程学院,广东 广州 510006; 2. 华南师大( 清远) 科技创新研究院有限公司,广东 清远 511517
  • 收稿日期:2020-07-17 修回日期:2020-08-26 出版日期:2021-04-13 发布日期:2021-04-22
  • 通讯作者: 彭 力,E-mail: pengli27@ 126. com
  • 作者简介:郭政鑫( 1999—) ,男,辽宁开原人,华南师范大学物理与电信工程学院 2018 级本科生.
  • 基金资助:
    国家自然科学基金( 61975058) ; 广州市科技计划项目( 201704020137) ; 蓝盾科技项目( LD20170209) 资助

Simulation and research on thermal lens effect of low power laser

GUO Zheng-xin¹,GAO Qi-ni¹,FAN Zi-ping¹,CHEN Qing-nan¹,   ZHENG Bo-wei¹,PENG Li¹,²   

  1. 1. School of Physics and Telecommunication Engineering,South China Normal University,Guangzhou,Guangdong 510006,China; 2. SCNU Qingyuan Institute of Science and Technology Innovation Co. ,Ltd. ,Qingyuan,Guangdong  511517,China
  • Received:2020-07-17 Revised:2020-08-26 Online:2021-04-13 Published:2021-04-22

摘要: 与高功率激光相比,低功率激光更安全,其热透镜效应对激光功率变化更敏感,更适合用于实验教学. 本文利用有限元法模拟低功率激光的热透镜效应,模拟介质温度场和等效热透镜焦距,定量探究低功率激光热透镜焦距与激光功率以及介质热吸收率、厚度的关系. 模拟结果与实验数据符合良好,为探究低功率激光热透镜效应实验提供理论依据.

关键词: 低功率激光, 热透镜效应, 有限元模拟, 热透镜焦距

Abstract: Comparing with high-power laser,low-power laser is safer and its thermal lens effect is

more sen- sitive to the change of laser power,so it is more suitable for experimental teaching. In

this paper,the thermal lens effect of low-power laser is simulated by using the finite element

method,namely,the temperature field of the me- dium and the focal length of the equivalent thermal

lens are simulated,and the relationship between the focal length of low-power laser and the laser

power as well as the thermal absorption rate and thickness of the medium is quanti- tatively

explored. The simulation results are in good agreement with the experimental data,which provides a

theo- retical basis for exploring the thermal lensing effect of low-power laser.

Key words: low power laser, thermal lens effect, finite element simulation, focal length of thermal lens