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Proceedings Paper

Laser damage studies of metal mirrors and ZnSe optics by long-pulse and TEA-CO2 lasers at 10.6 μm
Author(s): Wilfried Plass; Rene Krupka; Adolf Giesen; Herman E. Reedy; Michael Kennedy; Detlev Ristau
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Paper Abstract

Single shot laser damage studies have been performed using an RF-excited long pulse laser and a TEA-CO2-laser with pulse durations of 1.2 ms and 100 ns, respectively. Besides bare diamond turned copper mirrors with different metal and dielectric coatings, ZnSe-optics with selected coating types were tested. The temporal damage behavior in the long pulse regime was investigated on the basis of a damage detection system with a time resolution of 10 microsecond(s) . The dependence of the damage threshold on the intensity is discussed in consideration of the integral absorptance of the coatings. The measured damage thresholds of this detection system are compared to those obtained by Nomarski/darkfield microscopy. The local variation of the laser induced damage threshold is correlated to the corresponding photothermal deflection signal, reflectance, and defect density of the coated surfaces.

Paper Details

Date Published: 28 July 1994
PDF: 14 pages
Proc. SPIE 2114, Laser-Induced Damage in Optical Materials: 1993, (28 July 1994); doi: 10.1117/12.180906
Show Author Affiliations
Wilfried Plass, Univ. Stuttgart (Germany)
Rene Krupka, Univ. Stuttgart (Germany)
Adolf Giesen, Univ. Stuttgart (Germany)
Herman E. Reedy, II-VI, Inc. (United States)
Michael Kennedy, Laser Zentrum Hannover (Germany)
Detlev Ristau, Laser Zentrum Hannover (Germany)


Published in SPIE Proceedings Vol. 2114:
Laser-Induced Damage in Optical Materials: 1993
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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