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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 16 — Aug. 15, 2010
  • pp: 2702–2704

Fracture-induced subbandgap absorption as a precursor to optical damage on fused silica surfaces

P. E. Miller, J. D. Bude, T. I. Suratwala, N. Shen, T. A. Laurence, W. A. Steele, J. Menapace, M. D. Feit, and L. L. Wong  »View Author Affiliations

Optics Letters, Vol. 35, Issue 16, pp. 2702-2704 (2010)

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The optical damage threshold of indentation-induced flaws on fused silica surfaces was explored. Mechanical flaws were characterized by laser damage testing, as well as by optical, secondary electron, and photoluminescence microscopy. Localized polishing, chemical leaching, and the control of indentation morphology were used to isolate the structural features that limit optical damage. A thin defect layer on fracture surfaces, including those smaller than the wavelength of visible light, was found to be the dominant source of laser damage initiation during illumination with 355 nm , 3 ns laser pulses. Little evidence was found that either displaced or densified material or fluence intensification plays a significant role in optical damage at fluences > 35 J / cm 2 . Elimination of the defect layer was shown to increase the overall damage performance of fused silica optics.

© 2010 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(160.6030) Materials : Silica
(350.1820) Other areas of optics : Damage

ToC Category:

Original Manuscript: May 3, 2010
Revised Manuscript: July 6, 2010
Manuscript Accepted: July 12, 2010
Published: August 6, 2010

P. E. Miller, J. D. Bude, T. I. Suratwala, N. Shen, T. A. Laurence, W. A. Steele, J. Menapace, M. D. Feit, and L. L. Wong, "Fracture-induced subbandgap absorption as a precursor to optical damage on fused silica surfaces," Opt. Lett. 35, 2702-2704 (2010)

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