Scaling relations for laser damage initiation craters

Michael D. Feit; Lawrence W. Hrubesh; Alexander M. Rubenchik; Jen Nan Wong

doi:10.1117/12.425053

12 April 2001 Scaling relations for laser damage initiation craters

Michael D. Feit, Lawrence W. Hrubesh, Alexander M. Rubenchik, Jen Nan Wong

Proceedings Volume 4347, Laser-Induced Damage in Optical Materials: 2000; (2001) https://doi.org/10.1117/12.425053
Event: Laser-Induced Damage in Optical Materials: 2000, 2000, Boulder, CO, United States

Abstract

General physical relations connect the expected size and depth of laser damage induced craters to absorbed laser energy and to the strength of the material. In general, for small absorbers and instantaneous energy release, one expects three regions of interest. First is an inner region in which material is subjected to high pressure and temperature, pulverized and ejected. The resultant crater morphology will appear melted. A second region, outside the first, exhibits material removal due to spallation, which occurs when a shock wave is reflected at the free surface. The crater surface in this region will appear fractured. Finally, there is an outermost region where stresses are strong enough to crack material, but not to eject it. These regions are described theoretically and compared to representative observed craters in fused silica.

Citation Download Citation

Michael D. Feit, Lawrence W. Hrubesh, Alexander M. Rubenchik, and Jen Nan Wong "Scaling relations for laser damage initiation craters", Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001); https://doi.org/10.1117/12.425053

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