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ASTM Selected Technical Papers
Laser Induced Damage In Optical Materials: 1983
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:
0-8031-0930-X
ISBN:
978-0-8031-0930-8
No. of Pages:
584
Publisher:
ASTM International
Publication date:
1985

Plexiglass G, manufactured by Rohm Haas, was irradiated by 10 nsec pulses from a Nd-YAG laser ranging in energy from 0.80 to 1.01 mJ/pulse. Aligned colinearly with the Nd-YAG pulse was a cw HeNe laser beam that measured changes in the transmission characteristics of the plastics. These transmission measurements enabled the Strehl Ratio, S, of the laser induced damage site to be calculated. When S < 0.995 there is a 92% probability of causing permanent damage. Conversely, when S > 0.995 there is a 94% chance of not causing permanent damage to the plastic. These probabilities were independent of laser pulse energies. Evaluation of the resulting diffraction patterns from the permanent damage sites indicates an ∼ 20μm diameter of the optical scattering center in the plastic. These damage sites cause an rms wavefront distortion ranging from 0.009λ to 0.0301λ at the HeNe wavelength.

1.
O'Connell
R.
,
Saito
T. T.
, and
Deaton
T. F.
, “
Single and Multiple Shot Laser Induced Damage to PMMA
”, submitted to
Applied Optics
.
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