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Evolution During Multiple-Shot Irradiation of Damage Surrounding Isolated Platinum Inclusions in Phosphate Laser Glasses
Gonzales, RP
Lawrence Livermore National Laboratory University of California, California

Milam, D
Lawrence Livermore National Laboratory University of California, California

Pages: 10    Published: Jan 1988

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Source: STP1015-EB

Abstract

Platinum inclusions in samples of laser glass were placed in the center of a 2-mm-diameter beam and repeatedly irradiated with 1064-nm laser pulses having durations of 1.3, 9 or 50 ns. The initial major dimensions of the particles ranged from 4-75 μm. The thresholds for initiation of damage were 2.5 ± 0.3, 4 ± 0.4 and 8 ± 0.8 J/cm2, respectively, for the three pulse durations used in the tests. Thresholds were independent of particle size. Three particles with initial dimensions of 4, 5 and 8 μm caused damage smaller than 250 μm. One 6 μm particle and all particles larger than 10 μm caused larger damage.

Keywords:
platinum inclusions, bulk laser damage, phosphate laser glass

Paper ID: STP18734S
Committee/Subcommittee: F01.02
DOI: 10.1520/STP18734S
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