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Studies on the Aero-optical Phenomena of Free-vortex Aerodynamic Window′s Jet

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Abstract

The concept of the free-vortex aerodynamic windows(FADW) is one of the best effective methods taking the place of the conventional beam output crystal windows of high power laser. An experimental model of the supersonic free-vortex aerodynamic window has been designed and made in our latest study. This paper studies the aero-optical phenomena of the FADW′s supersonic jet to study the laser optical quality degradation caused by the free-vortex jet, and to find out the relation of output laser beam quality through the FADW to the structure of the FADW′s supersonic jet. First it studies the beam quality using the methods of far-field beam profile measurement and lateral shearing interferometry, and then it uses the principle of matrix-optics interpreting the large-scale phase distortion in detail. At last the structure of FADW′s jet has been studied by means of shadowgraphy.

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中图分类号:TN24

所属栏目:Experimental Techniques and Elements

收稿日期:2001-11-01

修改稿日期:2001-12-10

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LIU Tianhua(刘天华):School of Science, National University of Defense and Technology, Changsha 410073, China
JIANG Zongfu(姜宗福):School of Science, National University of Defense and Technology, Changsha 410073, China
LI Wenyu(李文煜):School of Science, National University of Defense and Technology, Changsha 410073, China
WANG Yunping(王云萍):Beijing Institute of Telecommunications and Tracking, Beijing 100094, China
LIU Zejin(刘泽金):School of Science, National University of Defense and Technology, Changsha 410073, China
ZHAO Yijun(赵伊君):School of Science, National University of Defense and Technology, Changsha 410073, China

备注:LIU Tianhua recived his BS degree in applied physics in 1996 and his MS degree in Optical Engineering in 1999 from the National University of Defeace Technology (China). Currently, he is majory in aero-optics and optical engineering toward a Ph.D.degree.

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【8】T.H.Liu, W.Y.Li, Z.F.Jiang et al.. Study on the optical properties of free-vortex aerodynamic window using far-field method. High Power Lasers and Particle Beams, 2001,13(1):9~14(in Chinese)

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【10】F.X.Chen, T.H.Liu, Z.F.Jiang et al.. Shearing interferometric investigation on degradation of light beam quality causing by the aerodynamic window′s flow field. High Power Lasers and Particle Beams, 2001,13(6):670~674(in Chinese)

引用该论文

LIU Tianhua(刘天华),JIANG Zongfu(姜宗福),LI Wenyu(李文煜),WANG Yunping(王云萍),LIU Zejin(刘泽金),ZHAO Yijun(赵伊君). Studies on the Aero-optical Phenomena of Free-vortex Aerodynamic Window′s Jet[J]. 中国激光(英文版), 2002, 11(6): 425-431

LIU Tianhua(刘天华),JIANG Zongfu(姜宗福),LI Wenyu(李文煜),WANG Yunping(王云萍),LIU Zejin(刘泽金),ZHAO Yijun(赵伊君). Studies on the Aero-optical Phenomena of Free-vortex Aerodynamic Window′s Jet[J]. Chinese Journal of Lasers, 2002, 11(6): 425-431

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