CW-laser-induced thermal and mechanical damage in optical materials

Hui Gong; Cheng Fu Li; Zhong Ya Li

doi:10.1117/12.344414

7 April 1999 CW-laser-induced thermal and mechanical damage in optical materials

Hui Gong, Cheng Fu Li, Zhong Ya Li

Proceedings Volume 3578, Laser-Induced Damage in Optical Materials: 1998; (1999) https://doi.org/10.1117/12.344414
Event: Laser-Induced Damage in Optical Materials: 1998, 1998, Boulder, CO, United States

Abstract

In this paper CW laser induced damage in optical materials were investigated using CW-CO₂ laser. Inhomogeneous absorption will result in thermal stress in optical materials, which will induce crack, fusion of optical materials. These damages are related to microcracks and thermal properties of materials. It is shown that surface microcracks of optical materials is very important factor of CW laser induced damage, and the size of optical materials also has influence on damage thresholds. It is provided that CW laser induced damage mechanisms are thermal-stress accumulation damage and thermal-shock-stress damage. In addition, chemical etching was used to improve the damage resistance of optical materials, and CW laser induced damage thresholds of optical materials largely increased after 5 percent HCl solution etching.

Citation Download Citation

Hui Gong, Cheng Fu Li, and Zhong Ya Li "CW-laser-induced thermal and mechanical damage in optical materials", Proc. SPIE 3578, Laser-Induced Damage in Optical Materials: 1998, (7 April 1999); https://doi.org/10.1117/12.344414

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