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J Res Natl Inst Stand Technol. 2001 Aug 01;106(4):641-7. doi: 10.6028/jres.106.029. Print 2001.

Comparison of Two Cryogenic Radiometers at NIST.

Journal of research of the National Institute of Standards and Technology

J M Houston, D J Livigni

Affiliations

  1. National Institute of Standards and Technology, Gaithersburg, MD 20899-8442.
  2. National Institute of Standards and Technology, Boulder, CO 80303.

PMID: 27500040 PMCID: PMC4862825 DOI: 10.6028/jres.106.029

Abstract

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.

Keywords: cryogenic radiometer; electrical substitution radiometry; silicon photodiode; trap detector

References

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