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22 November 2011 Effect of laser beam size on laser-induced damage performance
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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 damage probability is beam size dependent when various damage precursors with different potential behaviors are involved. This causes damage probability and LIDT are different between tested under large-aperture beam and under small-aperture beam. Moreover, fluence fluctuations of large-aperture laser beam bring about hot spots moving randomly across the beam from shot to shot. Thus it leads to the most probable maximum fluence after many shots at any location across components is several times the average beam fluence. These two effects result in difference of damage performance of components in large-aperture lasers and in small-aperture lasers.
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Wei Han, Fang Wang, Lidan Zhou, Fuquan Li, Bin Feng, Huaiting Jia, Yong Xiang, Feng Jing, and Wanguo Zheng "Effect of laser beam size on laser-induced damage performance", Proc. SPIE 8190, Laser-Induced Damage in Optical Materials: 2011, 819012 (22 November 2011);

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