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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 14 — Jul. 6, 2009
  • pp: 11469–11479

Initiation of laser-induced damage sites in fused silica optical components

Bertrand Bertussi, Philippe Cormont, Stéphanie Palmier, Philippe Legros, and Jean-Luc Rullier  »View Author Affiliations

Optics Express, Vol. 17, Issue 14, pp. 11469-11479 (2009)

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Significant improvement in the polishing process of fused silica optical components has increased their lifetimes at 351 nm. Nevertheless, for large laser facilities like the LaserMegaJoule (LMJ), zero defect optical components are not yet available. Therefore, a damage mitigation technique has been developed to prevent the growth of the laser-initiated damage sites. Because of the difficulty to produce mitigated sites with sufficiently large depth, the initial morphology of damage to mitigate is a critical issue. The aim of this work is to determine laser parameters (pulse duration, fluence) which permit us to initiate damage sites in accordance with our mitigation process. Confocal microscopy is used to observe damage sites that have sub-surface cracks and consequently to measure precisely the diameter and the depth of the area to mitigate.

© 2009 Optical Society of America

OCIS Codes
(140.2180) Lasers and laser optics : Excimer lasers
(140.3440) Lasers and laser optics : Laser-induced breakdown
(160.6030) Materials : Silica

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 31, 2009
Revised Manuscript: June 12, 2009
Manuscript Accepted: June 12, 2009
Published: June 24, 2009

Bertrand Bertussi, Philippe Cormont, Stéphanie Palmier, Philippe Legros, and Jean-Luc Rullier, "Initiation of laser-induced damage sites in fused silica optical components," Opt. Express 17, 11469-11479 (2009)

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