Comparison of two cryogenic radiometers by determining the absolute spectral responsivity of silicon photodiodes with an uncertainty of 0.02%
Applied Optics, Vol. 29, Issue 31, pp. 4686-4693 (1990)
http://dx.doi.org/10.1364/AO.29.004686
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Abstract
To substantiate the NPL primary standard cryogenic radiometer as an absolute instrument it has been compared with the cryogenic radiometer which was successfully used to determine the Stefan-Boltzmann constant. The comparison was carried out with an accuracy of better than 0.02% by the independent determination of the spectral responsivity of silicon photodiodes with each radiometer. Only a detector comprising a number of silicon photodiodes (a trap device) had the required stability to achieve the desired accuracy. Four trap devices were found to have near unity internal quantum efficiency, being self-consistent to within 0.01%.
Citation
Nigel P. Fox and John E. Martin, "Comparison of two cryogenic radiometers by determining the absolute spectral responsivity of silicon photodiodes with an uncertainty of 0.02%," Appl. Opt. 29, 4686-4693 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-31-4686
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