Lawrence Livermore National Security, LLC

Jeffery A Jarboe

Manyalibo Joseph Matthews

Jeffrey Devin Bude

Gabriel Mark Guss

John J Adams

Michael C Nostrand

Paul J Wegner

Masoud Bolourchi

The present disclosure relates to a system for repairing a damage site on a surface of an optical material. The system may have an Infrared (IR) laser which generates a laser beam having a predetermined wavelength, with a predetermined beam power, and such that the laser beam is focused to a predetermined full width ('F/W') 1/ediameter spot on the damage site. The IR laser may be controlled to maintain the focused IR laser beam on the damage site for a predetermined exposure period corresponding to a predetermined acceptable level of downstream intensification. The laser beam may heat the damage site to a predetermined peak temperature which causes melting and reflowing of material at the damage site to create a mitigated site.

System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics

A method for repairing a damage site on a surface of an optical material is disclosed. The method may involve focusing an Infrared (IR) laser beam having a predetermined wavelength, with a predetermined beam power, to a predetermined full width ('F/W') 1/ediameter spot on the damage site. The focused IR laser beam is maintained on the damage site for a predetermined exposure period corresponding to a predetermined acceptable level of downstream intensification. The focused IR laser beam heats the damage site to a predetermined peak temperature, which melts and reflows material at the damage site of the optical material to create a mitigated site.

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Livermore, CA, United States of America

Jeffery A Jarboe