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Proceedings Paper

Vacuum laser damage test bench
Author(s): Paul Allenspacher; Wolfgang Riede; Denny Wernham; Annalisa Capanni; Fabio Era
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Paper Abstract

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).

Paper Details

Date Published: 7 February 2006
PDF: 9 pages
Proc. SPIE 5991, Laser-Induced Damage in Optical Materials: 2005, 599128 (7 February 2006); doi: 10.1117/12.638550
Show Author Affiliations
Paul Allenspacher, DLR (Germany)
Wolfgang Riede, DLR (Germany)
Denny Wernham, European Space Agency/ESTEC (Netherlands)
Annalisa Capanni, Galileo Avionica S.p.A. (Italy)
Fabio Era, Galileo Avionica S.p.A. (Italy)

Published in SPIE Proceedings Vol. 5991:
Laser-Induced Damage in Optical Materials: 2005
Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M.J. Soileau; Christopher J. Stolz, Editor(s)

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