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Proceedings Paper

Identification and elimination of fluorescent surface-damage precursors on DKDP optics
Author(s): Mike C. Nostrand; Samuel L. Thompson; Wigbert J. Siekhaus; Michael J. Fluss; Douglas E. Hahn; Pamela K. Whitman; Alan K. Burnham
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Paper Abstract

Fluorescing surface defects that led to damage upon 351-nm laser exposure below 7 J/cm2 (3-ns) in DKDP optics were reported in these proceedings by this group a year ago. Subsequent laser damage experiments have correlated the density of these damage precursors to single-pont diamond finishing conditions. Every diamond-finishing schedule contains brittle-mode cutting and ductile-mode cutting in a taper-down sequence. Finishing experiments have traced the occurrence of these defects to insufficient ductile-mode removal of subsurface damage incurred during piror brittle-mode cutting. Additionally, a correlation between defect fluorescence, laser-induced damage, and defect meorphology has been established. Laser-induced damage tests also suggest a correlation between growth method and damage probability. Current experiments indicate that damage-prone defects can be minimized with the proper choice of diamond finishing conditions.

Paper Details

Date Published: 30 May 2003
PDF: 10 pages
Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); doi: 10.1117/12.472041
Show Author Affiliations
Mike C. Nostrand, Lawrence Livermore National Lab. (United States)
Samuel L. Thompson, Lawrence Livermore National Lab. (United States)
Wigbert J. Siekhaus, Lawrence Livermore National Lab. (United States)
Michael J. Fluss, Lawrence Livermore National Lab. (United States)
Douglas E. Hahn, Lawrence Livermore National Lab. (United States)
Pamela K. Whitman, Lawrence Livermore National Lab. (United States)
Alan K. Burnham, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 4932:
Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz; Adolf Giesen; Horst Weber, Editor(s)

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