Thermal and mechanical damage characteristics of two reflective multilayer films under laser irradiation

chen fa-liang; hu peng

Volume 17 Issue 11

Nov. 2005

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Article Navigation > High Power Laser and Particle Beams > 2005 > 17(11): 0-

zhou jin shan, liu guo zhi, peng peng, et al. Experimental studies on microwave coupling coefficient for differentshaped apertures[J]. High Power Laser and Particle Beams, 2004, 16.

Citation:

chen fa-liang, hu peng. Thermal and mechanical damage characteristics of two reflective multilayer films under laser irradiation[J]. High Power Laser and Particle Beams, 2005, 17.

zhou jin shan, liu guo zhi, peng peng, et al. Experimental studies on microwave coupling coefficient for differentshaped apertures[J]. High Power Laser and Particle Beams, 2004, 16.

Citation:

chen fa-liang, hu peng. Thermal and mechanical damage characteristics of two reflective multilayer films under laser irradiation[J]. High Power Laser and Particle Beams, 2005, 17.

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Thermal and mechanical damage characteristics of two reflective multilayer films under laser irradiation

1.
Institute of Applied Physics and Computational Mathematics,P.O.Box 8009-11,Beijing 100088,China

Publish Date: 2005-11-25

Abstract

Abstract

Based on the standing-wave theory, a theoretical model with high energy absorption at the surface and interfaces is employed to describe laser-induced damages to optical multilayer films. The temperature distributions in two types of reflective multilayer films are calculated, and the characteristics, modes and damage thresholds are analyzed. The results show that energy absorption is mainly determined by the distribution of the standing-wave and extinction coefficients of the material. Multi-peaks over the temperature profiles are found at the surface and interfaces, where the optical multilayer films are prone to damage. Melting and falling off are two main kinds of damage mode, while inclusion, if present, may cause spallation of the layers.
- laser damage,
- reflective multilayer film,
- standing wave,
- damage mode

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