7 February 2006 Vacuum laser damage test bench
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This work summarizes the results from an extensive test campaign in which space-based laser optics were qualified for the upcoming ESA ADM-Aeolus mission. 14 different types of optical components from different suppliers were tested at the Nd:YAG laser wavelength according to the ISO standard 11 254 - 2 for multiple pulse testing. A new technique based on transient pressure sensing was developed to monitor the occurrence of damage on a sample surface exposed to a vacuum environment. Parallel testing of reference samples showed a distinct degradation under vacuum compared to atmospheric or pressurized environment. For all samples tested we found a typical behavior in the characteristic damage curves attained: A sharp drop in LIDT for small pulse numbers followed by a smooth decrease for larger pulse numbers (laser fatigue effect).
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul Allenspacher, Paul Allenspacher, Wolfgang Riede, Wolfgang Riede, Denny Wernham, Denny Wernham, Annalisa Capanni, Annalisa Capanni, Fabio Era, Fabio Era, "Vacuum laser damage test bench", Proc. SPIE 5991, Laser-Induced Damage in Optical Materials: 2005, 599128 (7 February 2006); doi: 10.1117/12.638550; https://doi.org/10.1117/12.638550

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