The Role Of Thermal Conductivity In The Pulsed Laser Damage Sensitivity Of Optical Thin Films+

Arthur H Guenther; John K McIver

doi:10.1117/12.944451

27 June 1988 The Role Of Thermal Conductivity In The Pulsed Laser Damage Sensitivity Of Optical Thin Films+

Arthur H Guenther, John K McIver

Proceedings Volume 0895, Laser Optics for Intracavity and Extracavity Applications; (1988) https://doi.org/10.1117/12.944451
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Pulsed laser induced damage of optical thin films is, in general, initiated by the absorption of laser radiation by imperfections in the films or at interfaces between film layers and/or the substrate. A heat flow analysis of this process stresses the importance that the thermal conductivity of both the thin film host and that of the substrate play in establishing the laser-induced damage threshold. Unfortunately, recent work which will be reviewed in this presentation, indicates that the thermal conductivity of thin films can be several orders of magnitude lower than that of a corresponding material in bulk form, as a consequence of the film structure resulting principally from the deposition process. The importance of thermal conductivity will be compared to parameters such as absorption mechanisms, film materials, composition, and other variables. Its implication for the ultimate optical strength of materials and the direction in which thin film research and processing should proceed will be highlighted.

Citation Download Citation

Arthur H Guenther and John K McIver "The Role Of Thermal Conductivity In The Pulsed Laser Damage Sensitivity Of Optical Thin Films+", Proc. SPIE 0895, Laser Optics for Intracavity and Extracavity Applications, (27 June 1988); https://doi.org/10.1117/12.944451

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