Using the National Institute of Standards and Technology high-accuracy cryogenic radiometer (HACR), we have realized a scale of absolute spectral response between 406 and 920 nm. The HACR, an electrical-substitution radiometer operating at cryogenic temperatures, achieves a combined relative standard uncertainty of 0.021%. Silicon photodiode light-trapping detectors were calibrated against the HACR with a typical relative standard uncertainty of 0.03% at nine laser wavelengths between 406 and 920 nm. Modeling of the quantum efficiency of these detectors yields their responsivity throughout this range with comparable accuracy.
© 1996 Optical Society of America
Original Manuscript: August 14, 1995
Revised Manuscript: January 25, 1996
Published: August 1, 1996
T. R. Gentile, J. M. Houston, and C. L. Cromer, "Realization of a scale of absolute spectral response using the National Institute of Standards and Technology high-accuracy cryogenic radiometer," Appl. Opt. 35, 4392-4403 (1996)