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Foam-based optical absorber for high-power laser radiometry

Published

Author(s)

Krishna Ramadurai, Christopher L. Cromer, Xiaoyu X. Li, Roop Mahajan, John H. Lehman

Abstract

We report damage threshold measurement results for 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/cm2 at an incident circular spot size of 2 mm with an absorbance of 96 % at 1.064 υm. 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 two-phase heat transfer between the foam and the flowing water.
Citation
Applied Optics
Volume
46
Issue
34

Keywords

foam, laser damage, laser radiometry

Citation

Ramadurai, K. , Cromer, C. , Li, X. , Mahajan, R. and Lehman, J. (2007), Foam-based optical absorber for high-power laser radiometry, Applied Optics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32764 (Accessed April 12, 2024)
Created December 1, 2007, Updated January 27, 2020