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Proceedings Paper

Laser Damage Testing Of Coated Reflectors At Excimer Laser Wavelengths
Author(s): S. R. Foltyn; B. E. Newnam
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Paper Abstract

An important parameter in the design of large-scale ultraviolet lasers - such as those envisioned for Inertial Confinement Fusion and Molecular Laser Isotope Separation - is the resistance to optical damage of windows, AR-coatings, and coated reflectors. In addressing the problem of evaluating and optimizing highly reflective dielectric stacks, we have measured the damage thresholds of a variety of 248-nm, 308-nm, and 351-nm reflectors. The coatings were composed of quarterwave stacks of oxide and/or fluoride films deposited on Suprasil 2 substrates. Testing was accomplished at 35 Hz with nominal 10-ns pulses focused to a mean 1/e2 diameter of 0.5 - 0.6 mm. Damage threshold - defined as the highest fluence at which 10/10 sites survived 1000 shots - ranged from 1 - 5 J/cm2, with a strong dependence upon laser wavelength and reflector coating materials.

Paper Details

Date Published: 30 December 1981
PDF: 4 pages
Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); doi: 10.1117/12.932018
Show Author Affiliations
S. R. Foltyn, University of California (United States)
B. E. Newnam, University of California (United States)

Published in SPIE Proceedings Vol. 0288:
Los Alamos Conf on Optics '81
Donald H. Liebenberg, Editor(s)

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