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Improved Thermal Detector Coatings for Laser Radiometry at NIST

Published

Author(s)

John H. Lehman

Abstract

Nearly all of the radiometric standards for laser power and energy measurements at NIST and elsewhere in the world are based on thermal detectors. These detectors usually rely on a thermal absorber coating to enhance the detector responsivity. Ideally the composite detector and coating has low thermal mass (not exceeding that of the detector material) and high absorption efficiency (> 99 %) over a broad range of wavelengths (0.2 'm to 20 'm). We present investigations of the optical absorption and thermal efficiency of advanced coatings based on carbon nanotubes (CNTs). We present a summary of published results and opportunities for future research directed toward developing radiometric standards that are suited to ever-higher power and shorter (that is, ultraviolet) wavelengths.
Conference Dates
February 27-March 3, 2006
Conference Location
Anaheim, CA
Conference Title
MSC 2006 "The Science, Technology, and Control of Measurements"

Keywords

carbon nanotubes, laser radiometry, optical detectors, thermal detectors

Citation

Lehman, J. (2006), Improved Thermal Detector Coatings for Laser Radiometry at NIST, MSC 2006 "The Science, Technology, and Control of Measurements" , Anaheim, CA (Accessed July 24, 2024)

Issues

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Created February 27, 2006, Updated January 27, 2020