Experiment of laser induced damage threshold for different sub-surface cracks on fused silica

tian dong-bin; zu xiao-tao; yuan xiao-dong; xu shi-zhen; guo yuan-jun; jiang xiao-dong; li xu-ping; lu hai-bing; zheng wan-guo

Volume 19 Issue 09

Sep. 2007

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Article Navigation > High Power Laser and Particle Beams > 2007 > 19(09): 0-

liao shuqing, cheng cheng, zheng shuxin, et al. Experimental research of double-pulse linear induction electron accelerator[J]. High Power Laser and Particle Beams, 2009, 21.

Citation:

tian dong-bin, zu xiao-tao, yuan xiao-dong, et al. Experiment of laser induced damage threshold for different sub-surface cracks on fused silica[J]. High Power Laser and Particle Beams, 2007, 19.

liao shuqing, cheng cheng, zheng shuxin, et al. Experimental research of double-pulse linear induction electron accelerator[J]. High Power Laser and Particle Beams, 2009, 21.

Citation:

tian dong-bin, zu xiao-tao, yuan xiao-dong, et al. Experiment of laser induced damage threshold for different sub-surface cracks on fused silica[J]. High Power Laser and Particle Beams, 2007, 19.

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Experiment of laser induced damage threshold for different sub-surface cracks on fused silica

1.
Institute of Physics and Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China;
2.
Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China

Publish Date: 2007-09-15

Abstract

Abstract

The micro sub-surface cracks of fused silica are observed by AFM and optical microscope. Due to the morphology characters, the cracks are sorted into three types: Boussinesq-point-force crack(BPFC), Hertzian-conical scratch(HCS) and plastic indent(PI). The laser induced damage thresholds of the cracks are measured. The damage mechanism is also discussed. The results show that the damage threshold of sharp tip BPFC is less than 2.0 J/cm2, that of HCS get to 2.6 J/cm2, and that of PI with large shape change is 2.8 J/cm2. The laser induced damage threshold of PI with small change is parallel with that of perfect surface. It is obvious that BPFC and HCS with depth more than 1 μm are the main factors to decrease the laser induced damage threshold of fused silica.
- yag laser,
- fused silica,
- sub-surface cracks,
- damage threshold

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