Laser Damage Testing Of Coated Reflectors At Excimer Laser Wavelengths

S. R. Foltyn; B. E. Newnam

doi:10.1117/12.932018

30 December 1981 Laser Damage Testing Of Coated Reflectors At Excimer Laser Wavelengths

S. R. Foltyn, B. E. Newnam

Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932018
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States

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.

Citation Download Citation

S. R. Foltyn and B. E. Newnam "Laser Damage Testing Of Coated Reflectors At Excimer Laser Wavelengths", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932018

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