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Proceedings Paper

Single- and multiple-pulse Nd:YAG laser damage of ZnSe optics
Author(s): Wolfgang Riede
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Paper Abstract

The laser damage facility at DLR, Institut fuer Technische Physik, is based on the small-spot technique for 1/1 or S/1 investigations according to the ISO standards 11254-1.2 and 11254-2, respectively. A primary task is to measure out-of-band LIDTs of optical components used in the IR spectral range. The laser source is a pulsed, 10 Hz repetition frequency Nd:YAG laser providing a Gaussian intensity distribution on the sample. In this work, coated and uncoated samples of ZnSe were exposed to 1.06 micrometers radiation, and single and multiple pulse damage thresholds were measured. Time-resolved laser damage assessment based on scatter probe techniques was used to monitor the temporal development of the damage under multipulse irradiation. Up to a certain fluence limit above the multipulse threshold, a slight but stable surface modification irradiation. Up to a certain fluence limit above the multipulse threshold, a slight but stable surface modification was found. When raising the fluence above this value, severe damage occurred. The damage morphology was revealed with the help of microscopic techniques like Nomarski DIC and scanning force microscopy.

Paper Details

Date Published: 20 April 1998
PDF: 6 pages
Proc. SPIE 3244, Laser-Induced Damage in Optical Materials: 1997, (20 April 1998); doi: 10.1117/12.307048
Show Author Affiliations
Wolfgang Riede, DLR (Germany)


Published in SPIE Proceedings Vol. 3244:
Laser-Induced Damage in Optical Materials: 1997
Gregory J. Exarhos; Arthur H. Guenther; Mark R. Kozlowski; M. J. Soileau, Editor(s)

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