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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 18 — Jun. 20, 2002
  • pp: 3628–3633

Investigation of Processes Leading to Damage Growth in Optical Materials for Large-Aperture Lasers

Stavros G. Demos, Mike Staggs, and Mark R. Kozlowski  »View Author Affiliations


Applied Optics, Vol. 41, Issue 18, pp. 3628-3633 (2002)
http://dx.doi.org/10.1364/AO.41.003628


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Abstract

Damage growth in optical materials used in large-aperture laser systems is an issue of great importance to determine component lifetime and therefore cost of operation. Small size damage sites tend to grow when exposed to subsequent high-power laser irradiation at 355 nm. An understanding of the photophysical processes associated with damage growth is important to devise mitigation techniques. We examine the role of laser-modified material and cracks formed in the crater of damage pits in the damage growth process using fused-silica and deuterated KDP samples. Experimental results indicate that both of the above-mentioned features can initiate plasma formation at fluences as low as 2 J/cm<sup>2</sup>. The intensity of the recorded plasma emission remains low for fluences up to approximately 5 J/cm<sup>2</sup> but rapidly increases thereafter, accompanied by an increase of the size of the damage crater.

© 2002 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3330) Lasers and laser optics : Laser damage
(140.3380) Lasers and laser optics : Laser materials

Citation
Stavros G. Demos, Mike Staggs, and Mark R. Kozlowski, "Investigation of Processes Leading to Damage Growth in Optical Materials for Large-Aperture Lasers," Appl. Opt. 41, 3628-3633 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-18-3628

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