Single- and multiple-pulse Nd:YAG laser damage of ZnSe optics

Wolfgang Riede

doi:10.1117/12.307048

20 April 1998 Single- and multiple-pulse Nd:YAG laser damage of ZnSe optics

Wolfgang Riede

Proceedings Volume 3244, Laser-Induced Damage in Optical Materials: 1997; (1998) https://doi.org/10.1117/12.307048
Event: Laser-Induced Damage in Optical Materials: 1997, 1997, Boulder, CO, United States

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.

Citation Download Citation

Wolfgang Riede "Single- and multiple-pulse Nd:YAG laser damage of ZnSe optics", Proc. SPIE 3244, Laser-Induced Damage in Optical Materials: 1997, (20 April 1998); https://doi.org/10.1117/12.307048

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