Paper
27 May 1996 Environmental stability of CO2 laser optics
Michael Kennedy, Wilfried Plass, Detlev Ristau, Adolf Giesen
Author Affiliations +
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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Kennedy, Wilfried Plass, Detlev Ristau, and Adolf Giesen "Environmental stability of CO2 laser optics", Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); https://doi.org/10.1117/12.240370
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KEYWORDS
Copper

Mirrors

Humidity

Reflectivity

Carbon dioxide lasers

Laser induced damage

Pulsed laser operation

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