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ASTM Selected Technical Papers
Laser Induced Damage in Optical Materials: 1981
By
HE Bennett
HE Bennett
1
Naval Weapons Center
?
China Lake, California 93555
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AH Guenther
AH Guenther
2
Air Force Weapons Laboratory Kirtland Air Force Base
,
New Mexico 87117
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D Milam
D Milam
3
Lawrence Livermore National Laboratory
?
Livermore, California 94550
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BE Newnam
BE Newnam
4
Los Alamos National Laboratory
?
Los Alamos, New Mexico 87545
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ISBN-10:
0-8031-0708-0
ISBN:
978-0-8031-0708-3
No. of Pages:
655
Publisher:
ASTM International
Publication date:
1983

Intensity dependent absorption and multiple pulse induced failure of mechanically polished and diamond turned Cu mirrors were investigated at 1.06 μm. A Q-switched single longitudinal and single transverse mode Nd:YAG laser operating at 10 Hz was the irradiation source in the experiments. Repetitively pulsed calorimetry was used to measure the absorption and to record the onset of the multiple pulse-induced failure at high intensities. The absorptance was found to increase with increasing intensity. The change was compared to that predicted by the Drude model where the increase in absorptance is related to temperature. A spot size dependence of the laser damage intensities was observed which is suggestive of the role of laser induced stresses in the failure process.

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