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Proceedings Article

Improving 351-nm damage performance of large-aperture fused silica and DKDP optics

[+] Author Affiliations
Alan K. Burnham, Lloyd A. Hackel, Paul J. Wegner, Thomas G. Parham, Lawrence W. Hrubesh, Bernie M. Penetrante, Pamela K. Whitman, Stavros G. Demos, Joseph A. Menapace, Michael J. Runkel, Michael J. Fluss, Michael D. Feit, Michael H. Key, Thomas A. Biesiada

Lawrence Livermore National Lab. (USA)

Proc. SPIE 4679, Laser-Induced Damage in Optical Materials: 2001, 173 (March 28, 2002); doi:10.1117/12.461712
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From Conference Volume 4679

  • Laser-Induced Damage in Optical Materials: 2001
  • Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz
  • Boulder, CO | October 01, 2001

abstract

A program to identify and eliminate the causes of UV laser- induced damage and growth in fused silica and DKDP has developed methods to extend optics lifetimes for large- aperture, high-peak-power, UV lasers such as the National Ignition Facility (NIF). Issues included polish-related surface damage initiation and growth on fused silica and DKDP, bulk inclusions in fused silica, pinpoint bulk damage in DKDP, and UV-induced surface degradation in fused silica and DKDP in a vacuum. Approaches included an understanding of the mechanism of the damage, incremental improvements to existing fabrication technology, and feasibility studies of non-traditional fabrication technologies. Status and success of these various approaches are reviewed. Improvements were made in reducing surface damage initiation and eliminating growth for fused silica by improved polishing and post- processing steps, and improved analytical techniques are providing insights into mechanisms of DKDP damage. The NIF final optics hardware has been designed to enable easy retrieval, surface-damage mitigation, and recycling of optics.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Alan K. Burnham ; Lloyd A. Hackel ; Paul J. Wegner ; Thomas G. Parham ; Lawrence W. Hrubesh, et al.
"Improving 351-nm damage performance of large-aperture fused silica and DKDP optics", Proc. SPIE 4679, Laser-Induced Damage in Optical Materials: 2001, 173 (March 28, 2002); doi:10.1117/12.461712; http://dx.doi.org/10.1117/12.461712


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