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1 February 2008 Influence of beam spatial distribution on the laser damage of optical material
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Based on the theoretical model of uniform pulsed laser beam irradiating on the optical material, the stress distribution of the transparent material when laser with different beam spatial distribution - circle beam spot and dark-cross beam spot - irradiated to the inner of optical material was discussed. The experiment that 532nm Q-switched laser pulse was focused to the inner of silicate glass was taken, which the beam spatial distribution of the output laser was dark-cross beam spot. According to the theory, the experimental results and phenomena were analyzed and the damage micro-configurations were explained. The theory and experiment could be accordant well.
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Lijun Qi, Xiao Zhu, Changhong Zhu, Guangzhi Zhu, and Tao Yang "Influence of beam spatial distribution on the laser damage of optical material", Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 68250A (1 February 2008);

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