Abstract

Damage thresholds of various high power laser coatings produced by Balzers were measured with a single shot laser at 1.06 μm. The coatings—two types of high reflecting mirror and three types of antireflection coating—have been electron gun deposited on glass substrates of 2.54-cm (1-in.) diam. Damage was induced by irradiation of 12-nsec pulses from an unstable resonator-type Nd:YAG laser with a Gaussian far-field intensity profile. The thresholds were calculated from the diameter of damage craters and pulse energy. The highest damage thresholds were 60 J/cm2 (5 GW/cm2) for maximum reflectors and 9 J/cm2 (750 MW/cm2) for antireflection coatings, respectively.

© 1984 Optical Society of America

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