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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 34 — Dec. 1, 2007
  • pp: 8268–8271

Foam-based optical absorber for high-power laser radiometry

Krishna Ramadurai, Christopher L. Cromer, Xiaoyu Li, Roop L. Mahajan, and John H. Lehman  »View Author Affiliations

Applied Optics, Vol. 46, Issue 34, pp. 8268-8271 (2007)

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We report damage threshold measurements of novel absorbers comprised of either liquid-cooled silicon carbide or vitreous carbon foams. The measurements demonstrate damage thresholds up to 1.6 × 10 4 W / cm 2 at an incident circular spot size of 2   mm with an absorbance of 96 % at 1.064 μ m . We present a summary of the damage threshold as a function of the water flow velocity and the absorbance measurements. We also present a qualitative description of a damage mechanism based on a two-phase heat transfer between the foam and the flowing water.

© 2007 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(140.0140) Lasers and laser optics : Lasers and laser optics

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 10, 2007
Revised Manuscript: October 23, 2007
Manuscript Accepted: October 25, 2007
Published: November 26, 2007

Krishna Ramadurai, Christopher L. Cromer, Xiaoyu Li, Roop L. Mahajan, and John H. Lehman, "Foam-based optical absorber for high-power laser radiometry," Appl. Opt. 46, 8268-8271 (2007)

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