论文信息 - Influence of beam spatial distribution on the laser damage of optical material

Influence of beam spatial distribution on the laser damage of optical material

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.

Tao Yang | Lijun Qi | Guangzhi Zhu | Changhong Zhu | Xiao Zhu

[1] Chen Fa. Thermal deformation of optical windows induced by annularly-distributed laser beam , 2003 .

[2] Guo Shaofeng. Influence of mechanical boundary on laser induced damage threshold in optical materials , 2001 .

[3] Tomosumi Kamimura,et al. Wavelength dependence of laser-induced damage in fused silica and fused quartz , 1998, Laser Damage.

[4] M. F. Koldunov,et al. Pulse-width and pulse-shape dependencies of laser-induced damage threshold to transparent optical materials , 1996, Laser Damage.

[5] Luo Fu. Near-infrared Laser Beam Diameter Effect on Damage Threshold in K9 Glass , 2002 .

[6] Serge V. Garnov,et al. Pulse-width dependence of laser damage in optical materials: critical analysis of available data and recent results for nanopicosecond region , 1993, Laser Damage.