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Proceedings Paper

Damage precursor measurements on UV optical coatings
Author(s): K. Ettrich; Holger Blaschke; Eberhard Welsch
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Paper Abstract

For application in UV thin film optics the thermal contribution to the laser-induced optical breakdown was investigated utilizing time-resolved photothermal probe beam deflection (MIRAGE) technique. The potentiality of this method for the determination of both the subdamage range and the onset of single-shot-damage of Al2O3/SiO2 and LaF3/MgF2 high-reflective coatings by using the thermal branch of the MIRAGE technique could be demonstrated. Examining the dielectric mirrors by 248 nm KrF laser irradiation, distinct damage precursor features were found. Thus, the physical origin of the UV-pulsed radiation breakdown in HR coatings can be elucidated.

Paper Details

Date Published: 14 July 1995
PDF: 11 pages
Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); doi: 10.1117/12.213763
Show Author Affiliations
K. Ettrich, Friedrich-Schiller-Univ. Jena (Germany)
Holger Blaschke, Freidrich-Schiller-Univ. Jena (Germany)
Eberhard Welsch, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 2428:
Laser-Induced Damage in Optical Materials: 1994
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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