Environmental stability of CO2 laser optics

Michael Kennedy; Wilfried Plass; Detlev Ristau; Adolf Giesen

doi:10.1117/12.240370

27 May 1996 Environmental stability of CO₂ laser optics

Michael Kennedy, Wilfried Plass, Detlev Ristau, Adolf Giesen

Proceedings Volume 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995; (1996) https://doi.org/10.1117/12.240370
Event: Laser-Induced Damage in Optical Materials: 1995, 1995, Boulder, CO, United States

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.

Citation Download Citation

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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