Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Comparison of Two Cryogenic Radiometers at NIST



Jeanne M. Houston, David J. Livigni


Two cryogenic radiometers from NIST, one from the Optical Technology Division and the other from the Optoelectronics Division, were compared at three visible laser wavelengths. For this comparison each radiometer calibrated two photodiode trap detectors for spectral responsivity. The calibration values for the two trap detectors agreed within the expanded (k=2) uncertainties. This paper describes the measurement and results of this comparison.
Journal of Research (NIST JRES) -
106 No. 4


cryogenic radiometer, electrical substitution radiometry, silicon photodiode, trap detector


Houston, J. and Livigni, D. (2001), Comparison of Two Cryogenic Radiometers at NIST, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed June 13, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 1, 2001, Updated February 17, 2017