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Volume 24 Issue 2
Sep.  2013
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Determination of optical characteristics of aerodynamic window with big exit aperture

  • Received Date: 1999-01-18
  • The optical characteristics of jet injecting aerodynamic window with big exit aperture have studied experimentally. The Strehl ratio,wavefront aberration and coefficients of Zernike polynomial of laser beam,passed through the aerodynamic window,were given up from the data,collected by HARTMANN diagnostic apparatus. From these optical characteristics it can be analyze,that the injection flow pressure and the structure of aerodynamic window influence on the passed beam quality.It was shown that the passed beam will be divergence,as the injection flow pressure becomes large. It is related to that the axial grads of air density distribution,caused by gas flow from circular nozzle,become large. And heterogeneous distribution of air bleed hole makes the wavefront tilt so that the passed laser beam will shift.
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  • [1] 陈金宝,刘泽金,蒋志平et al.强激光与粒子束,1994;6(2):243~249

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    Timothy S.USP,4,777,426,1988
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    Bruce V J.USP,4,559,628,1985
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    Du Kemin,Franck J,Lossen P et al.8th International symposium on gas flow and chemical laser.Madrid,Spain,1990:639~643
    [5] 周仁忠主编.自适应光学.北京:国防工业出版社,1996

    [6] 朱松林,程祖海,李再光.强激光与粒子束,1997;9(2):161~166

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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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Determination of optical characteristics of aerodynamic window with big exit aperture

  • 1. National Laboratory of Laser Technology, HUST, Wuhan, 430074;
  • 2. Department of Physics, Kim Cheak Technical University, Pyongyang, The Democratic People's Republic of Korea

Abstract: The optical characteristics of jet injecting aerodynamic window with big exit aperture have studied experimentally. The Strehl ratio,wavefront aberration and coefficients of Zernike polynomial of laser beam,passed through the aerodynamic window,were given up from the data,collected by HARTMANN diagnostic apparatus. From these optical characteristics it can be analyze,that the injection flow pressure and the structure of aerodynamic window influence on the passed beam quality.It was shown that the passed beam will be divergence,as the injection flow pressure becomes large. It is related to that the axial grads of air density distribution,caused by gas flow from circular nozzle,become large. And heterogeneous distribution of air bleed hole makes the wavefront tilt so that the passed laser beam will shift.

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