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.
Citation: Journal of Research (NIST JRES) -
Volume: 106 No. 4
NIST Pub Series: Journal of Research (NIST JRES)
Pub Type: NIST Pubs
cryogenic radiometer, electrical substitution radiometry, silicon photodiode, trap detector