The effect of laser beam size on laser-induced damage performance

doi:10.1088/1674-1056/21/7/077901

中国物理B ›› 2012, Vol. 21 ›› Issue (7): 77901-077901.doi: 10.1088/1674-1056/21/7/077901

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

The effect of laser beam size on laser-induced damage performance

韩伟, 王芳, 周丽丹, 冯斌, 贾怀庭, 李恪宇, 向勇, 郑万国

Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

收稿日期:2011-08-12 修回日期:2012-02-02 出版日期:2012-06-01 发布日期:2012-06-01

The effect of laser beam size on laser-induced damage performance

Han Wei(韩伟)^†, Wang Fang(王芳), Zhou Li-Dan(周丽丹), Feng Bin(冯斌), Jia Huai-Ting(贾怀庭), Li Ke-Yu(李恪宇), Xiang Yong(向勇), and Zheng Wan-Guo(郑万国)

Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

Received:2011-08-12 Revised:2012-02-02 Online:2012-06-01 Published:2012-06-01
Contact: Han Wei E-mail:tonyhan2000@163.com

摘要/Abstract

摘要： The influence of laser beam size on laser-induced damage performance, especially damage probability and laser-induced damage threshold (LIDT), is investigated. It is found that the damage probability is dependent on the beam size when various damage precursors with different potential behaviors are involved. This causes the damage probability and the LIDT to be different between the cases under a large-aperture beam and under a small-aperture beam. Moreover, the fluence fluctuation of large-aperture laser beam brings out hot spots, which move randomly across the beam from shot to shot. Thus it leads the most probable maximum fluence after many shots at any location on the optical component to be several times the average beam fluence. These two effects result in the difference in damage performance of the optical component between the cases under a large-aperture laser and under a small-aperture laser.

关键词: laser-induced damage, beam aperture, beam modulation

Abstract: The influence of laser beam size on laser-induced damage performance, especially damage probability and laser-induced damage threshold (LIDT), is investigated. It is found that the damage probability is dependent on the beam size when various damage precursors with different potential behaviors are involved. This causes the damage probability and the LIDT to be different between the cases under a large-aperture beam and under a small-aperture beam. Moreover, the fluence fluctuation of large-aperture laser beam brings out hot spots, which move randomly across the beam from shot to shot. Thus it leads the most probable maximum fluence after many shots at any location on the optical component to be several times the average beam fluence. These two effects result in the difference in damage performance of the optical component between the cases under a large-aperture laser and under a small-aperture laser.

Key words: laser-induced damage, beam aperture, beam modulation

中图分类号: (Laser-beam impact phenomena)

79.20.Ds

42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.70.Ce (Glasses, quartz)

韩伟, 王芳, 周丽丹, 冯斌, 贾怀庭, 李恪宇, 向勇, 郑万国 . The effect of laser beam size on laser-induced damage performance[J]. 中国物理B, 2012, 21(7): 77901-077901.

Han Wei(韩伟), Wang Fang(王芳), Zhou Li-Dan(周丽丹), Feng Bin(冯斌), Jia Huai-Ting(贾怀庭), Li Ke-Yu(李恪宇), Xiang Yong(向勇), and Zheng Wan-Guo(郑万国) . The effect of laser beam size on laser-induced damage performance[J]. Chin. Phys. B, 2012, 21(7): 77901-077901.

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The effect of laser beam size on laser-induced damage performance

The effect of laser beam size on laser-induced damage performance

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