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Proceedings Paper

Environmental stability of CO2 laser optics
Author(s): Michael Kennedy; Wilfried Plass; Detlev Ristau; Adolf Giesen
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Paper Abstract

Transmissive and reflective optics for high power CO2 lasers were exposed to define relative humidities and temperatures. Degradation effects were investigated by means of absorptance, reflectance, laser-induced damage threshold measurements and microscopic inspection. The LIDT measurements were performed in the short and long-pulse regime involving different test routines as 1 on 1, S on 1 and R on 1. For distinct coatings, microscopic investigation reveal a size-increase of the nodular defects. This increase results in a reduction of the defect induced LIDT, while the absorptance and reflectance remain unchanged. Alkali-halide components show an intensity-dependent laser-induced conditioning effect. This effect is analyzed with respect to different environmental parameters.

Paper Details

Date Published: 27 May 1996
PDF: 11 pages
Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); doi: 10.1117/12.240370
Show Author Affiliations
Michael Kennedy, Laser Zentrum Hannover eV (Germany)
Wilfried Plass, Univ. Stuttgart (Germany)
Detlev Ristau, Laser Zentrum Hannover eV (Germany)
Adolf Giesen, Univ. Stuttgart (Germany)


Published in SPIE Proceedings Vol. 2714:
27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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