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Ultra-precision grinding of LHG-8 laser glass and laser damage thresholds
Author(s): Y. Namba
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Paper Abstract

It has been very important to reduce the machining cost of optical materials in the laser fusion program. LHG-8 laser glass was ground with the ultra-precision surface grinder having a glass-ceramic spindle of zero-thermal expansion in order to remove or shorten the optical polishing process in manufacturing high power laser optics. The laser damage thresholds were measured at 1 ns and 30 ns in pulse width and 1.053 µm in wavelength on ground surfaces as well as optically-polished surfaces. 0.5 nm rms in surface roughness was measured on the ground surface with WYKO's TOPO-3D. The laser damage thresholds on the ground surface were very similar to that on the optically-polished one.

Paper Details

Date Published: 2 October 2017
PDF: 1 pages
Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14380P (2 October 2017); doi: 10.1117/12.2294434
Show Author Affiliations
Y. Namba, Chubu Univ. (Japan)

Published in SPIE Proceedings Vol. 1438:
Laser-Induced Damage in Optical Materials 1989
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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