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

Abstract

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.

Inventors:
; ; ; ; ; ; ;
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1477470
Patent Number(s):
10,059,624
Application Number:
15/238,230
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Aug 16
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Adams, John J., Bolourchi, Masoud, Bude, Jeffrey D., Guss, Gabriel M., Jarboe, Jeffery A., Matthews, Manyalibo J., Nostrand, Michael C., and Wegner, Paul J. System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics. United States: N. p., 2018. Web.
Adams, John J., Bolourchi, Masoud, Bude, Jeffrey D., Guss, Gabriel M., Jarboe, Jeffery A., Matthews, Manyalibo J., Nostrand, Michael C., & Wegner, Paul J. System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics. United States.
Adams, John J., Bolourchi, Masoud, Bude, Jeffrey D., Guss, Gabriel M., Jarboe, Jeffery A., Matthews, Manyalibo J., Nostrand, Michael C., and Wegner, Paul J. Tue . "System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics". United States. https://www.osti.gov/servlets/purl/1477470.
@article{osti_1477470,
title = {System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics},
author = {Adams, John J. and Bolourchi, Masoud and Bude, Jeffrey D. and Guss, Gabriel M. and Jarboe, Jeffery A. and Matthews, Manyalibo J. and Nostrand, Michael C. and Wegner, Paul J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

Patent:

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Works referenced in this record:

Carbon dioxide laser polishing of fused silica surfaces for increased laser-damage resistance at 1064 nm
journal, January 1982

  • Temple, Paul A.; Lowdermilk, W. Howard; Milam, David
  • Applied Optics, Vol. 21, Issue 18, p. 3249-3255
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Optimization of a laser mitigation process in damaged fused silica
journal, March 2009


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  • Boulder Damage Symposium XXXVII: Annual Symposium on Optical Materials for High Power Lasers
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Localized CO2 laser damage repair of fused silica optics
journal, January 2006

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Methods for mitigating surface damage growth in NIF final optics
conference, March 2002

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  • Boulder Damage
  • DOI: 10.1117/12.461723

Mitigation of growth of laser initiated surface damage in fused silica using a 4.6-micron wavelength laser
conference, October 2006

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  • Boulder Damage Symposium XXXVIII: Annual Symposium on Optical Materials for High Power Lasers
  • DOI: 10.1117/12.696084

Results of applying a non-evaporative mitigation technique to laser-initiated surface damage on fused-silica
conference, November 2010

  • Adams, J. J.; Bolourchi, M.; Bude, J. D.
  • Laser Damage Symposium XLII: Annual Symposium on Optical Materials for High Power Lasers
  • DOI: 10.1117/12.867652