Ramadurai, KrishnaCromer, Christopher L.Li, XiaoyuMahajan, Roop L.Lehman, John H.2014-03-142014-03-142007-12-01Krishna 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); doi: 10.1364/ao.46.0082681559-128Xhttp://hdl.handle.net/10919/25908We 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 x 104 W/cm(2) at an incident circular spot size of 2 mm with an absorbance of 96% at 1.064 mu 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. (c) 2007 Optical Society of America.en-USIn CopyrightForced-convectionMetal foamsCalorimeterArticle - Refereedhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-34-8268https://doi.org/10.1364/ao.46.008268