Ultra-precision grinding of LHG-8 laser glass and laser damage thresholds

Y. Namba

doi:10.1117/12.2294434

1 November 1990 Ultra-precision grinding of LHG-8 laser glass and laser damage thresholds

Y. Namba

Proceedings Volume 1438, Laser-Induced Damage in Optical Materials 1989; 14380P (1990) https://doi.org/10.1117/12.2294434
Event: Laser-Induced Damage in Optical Materials 1989, 1989, Boulder, CO, United States

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 Ã‚Âµm 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.

Citation Download Citation

Y. Namba "Ultra-precision grinding of LHG-8 laser glass and laser damage thresholds", Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14380P (1 November 1990); https://doi.org/10.1117/12.2294434

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