CO2-laser polishing for reductoin of 351-nm surface damage initiation in fused silica

Raymond M. Brusasco; Bernie M. Penetrante; Jim A. Butler; Stephen M. Maricle; John Peterson

doi:10.1117/12.461720

9 April 2002 CO₂-laser polishing for reductoin of 351-nm surface damage initiation in fused silica

Raymond M. Brusasco, Bernie M. Penetrante, Jim A. Butler, Stephen M. Maricle, John Peterson

Proceedings Volume 4679, Laser-Induced Damage in Optical Materials: 2001; (2002) https://doi.org/10.1117/12.461720
Event: Boulder Damage, 2001, Boulder, CO, United States

Abstract

We have applied a carbon dioxide (CO₂) raster scanning laser polishing technique on two types of fused silica flat optics to determine the efficacy of CO₂-laser polishing as a method to increase the 351-nm laser damage resistance of optic surfaces. R-on-1 damage test results show that the fluence for any given 355-nm damage probability is 10-15 J/cm² higher (at 3 ns pulse length, scaled) for the CO₂-laser polished samples. Poor quality and good quality surfaces respond to the treatment such that their surface damage resistance is brought to approximately the same level. Surface stress and the resultant effect on wavefront quality remain key technology issues that would need to be addressed for a robust deployment.

Citation Download Citation

Raymond M. Brusasco, Bernie M. Penetrante, Jim A. Butler, Stephen M. Maricle, and John Peterson "CO₂-laser polishing for reductoin of 351-nm surface damage initiation in fused silica", Proc. SPIE 4679, Laser-Induced Damage in Optical Materials: 2001, (9 April 2002); https://doi.org/10.1117/12.461720

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