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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 9 — Mar. 20, 2011
  • pp: C457–C462

Fabrication of mitigation pits for improving laser damage resistance in dielectric mirrors by femtosecond laser machining

Justin E. Wolfe, S. Roger Qiu, and Christopher J. Stolz  »View Author Affiliations


Applied Optics, Vol. 50, Issue 9, pp. C457-C462 (2011)
http://dx.doi.org/10.1364/AO.50.00C457


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Abstract

Femtosecond laser machining is used to create mitigation pits to stabilize nanosecond laser-induced damage in multilayer dielectric mirror coatings on BK7 substrates. In this paper, we characterize features and the artifacts associated with mitigation pits and further investigate the impact of pulse energy and pulse duration on pit quality and damage resistance. Our results show that these mitigation features can double the fluence-handling capability of large-aperture optical multilayer mirror coatings and further demonstrate that femtosecond laser macromachining is a promising means for fabricating mitigation geometry in multilayer coatings to increase mirror performance under high-power laser irradiation.

© 2011 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(310.0310) Thin films : Thin films

History
Original Manuscript: October 5, 2010
Revised Manuscript: January 26, 2011
Manuscript Accepted: January 31, 2011
Published: March 18, 2011

Citation
Justin E. Wolfe, S. Roger Qiu, and Christopher J. Stolz, "Fabrication of mitigation pits for improving laser damage resistance in dielectric mirrors by femtosecond laser machining," Appl. Opt. 50, C457-C462 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-9-C457


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References

  1. J. E. Wolfe, S. R. Qiu, C. J. Stolz, M. Thomas, C. Martinez, and A. Ozkan, “Laser-damage-resistant pits in dielectric coatings created by femtosecond laser machining,” Proc. SPIE 7504, 750401 (2009). [CrossRef]
  2. S. R. Qiu, J. E. Wolfe, A. M. Monterrosa, M. D. Feit, T. V. Pistor, and C. J. Stolz, “Modeling of light intensification by conical pits within multilayer high reflector coatings,” Proc. SPIE 7504, 75040M (2009). [CrossRef]
  3. S. R. Qiu, J. E. Wolfe, A. M. Monterrosa, M. D. Feit, T. V. Pistor, and C. J. Stolz, “Searching for optimal mitigation geometries for laser-resistant multilayer high reflector coatings,” Appl. Opt. 50, C373–C381 (2011). [CrossRef] [PubMed]
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