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Volume 29 Issue 5
Sep.  2013
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Thermal deformation of optical windows irradiated by high power laser beam

  • Received Date: 2004-08-02
    Accepted Date: 2004-09-13
  • Based on three dimensional transient heat conduction equation and elastic stress-strain equation,the temperature rise,distortion and equivalent stress distribution of white bijou window irradiated by high power annular beam(λ=(1.315)μm) are simulated using a three dimensional finite element model(FEM).The temperature rise,distortion and equivalent stress distribution of fluoride glass window induced by high power hollow rectangular laser beam(λ=3.8μm) are also simulated.Laser intensity spatial gradient and attenuation in window are considered in computational model.
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    MANSELL J D,HENNAW I J,GUSTAFSON E K et al.Evaluating the effect of transmissive optic thermal lensing on laser beam quality with a Shack-Hartmann[J].Appl Opt,2001,40(3):366~374.
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    CLANDE A K.Materials for high-power laser optics:figures of merit for thermally induced beam distortions[J].Opt Engng,1997,36(6): 1586~1595.
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    [4] 马毅勇,程祖海,张耀宇.高功率激光与窗口热变形分析的有限元方法[J].强激光与粒子束,1999,11(1):6~10.

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    HARR IS D C.Materials for infrared windows and domes(properties and performances)[M].Bellingham:SPIE Optical Enginerrring Press,1999.126~129.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Thermal deformation of optical windows irradiated by high power laser beam

  • 1. Institute of Fluid Physics, CAEP, Mianyang 621900, China;
  • 2. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China

Abstract: Based on three dimensional transient heat conduction equation and elastic stress-strain equation,the temperature rise,distortion and equivalent stress distribution of white bijou window irradiated by high power annular beam(λ=(1.315)μm) are simulated using a three dimensional finite element model(FEM).The temperature rise,distortion and equivalent stress distribution of fluoride glass window induced by high power hollow rectangular laser beam(λ=3.8μm) are also simulated.Laser intensity spatial gradient and attenuation in window are considered in computational model.

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