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

Patent ·
OSTI ID:1477470
; ; ; ; ; ; ;
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/e.sup.2 diameter 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.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Number(s):
10,059,624
Application Number:
15/238,230
OSTI ID:
1477470
Country of Publication:
United States
Language:
English

References (9)

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conference October 2006
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conference December 2005
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conference November 2010
Downstream intensification effects associated with CO 2 laser mitigation of fused silica
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conference October 2007
Carbon dioxide laser polishing of fused silica surfaces for increased laser-damage resistance at 1064 nm journal January 1982
Optimization of a laser mitigation process in damaged fused silica journal March 2009

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