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Foam-based optical absorber for high-power laser radiometry



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


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.
Applied Optics


foam, laser damage, laser radiometry


Ramadurai, K. , Cromer, C. , Li, X. , Mahajan, R. and Lehman, J. (2007), Foam-based optical absorber for high-power laser radiometry, Applied Optics, [online], (Accessed April 12, 2024)
Created December 1, 2007, Updated January 27, 2020