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ASTM Selected Technical Papers
Laser Induced Damage in Optical Materials: 1985
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:
0-8031-4479-2
ISBN:
978-0-8031-4479-8
No. of Pages:
582
Publisher:
ASTM International
Publication date:
1988

We report the results of damage studies at 532 nm on BK-7 glass, KCl, fused silica and two grades of crystalline quartz using a frequency doubled, Q-switched YAG laser. This work represents the initial stages of a program to investigate the mechanisms of multiple pulse laser-induced bulk damage in transparent solids. Comparison of BK-7 damage behavior with that of fused silica shows little effect due to the color center generation which occurs in BK-7 due to its small band gap. Commercially grown KCl exhibits multiple pulse catastrophic damage at fluences significantly below single pulse “threshold”, probably due to grown-in defects. Laser-induced damage behavior has been compared between two grades of crystalline quartz, with the surprising result that the nominally less perfect material is the more resistant to damage. The presence of “etch tunnels” may be involved, but considerably more study is required.

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