Characterisation of photon counting systems at NPL

Evangelos Theocharous; Jessica Cheung; Christopher Chunnilall

doi:10.1117/12.851861

27 April 2010 Characterisation of photon counting systems at NPL

Evangelos Theocharous, Jessica Cheung, Christopher Chunnilall

Author Affiliations +

Proceedings Volume 7681, Advanced Photon Counting Techniques IV; 768105 (2010) https://doi.org/10.1117/12.851861
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

The full characterisation of photon counting detection systems is important because it allows the identification and subsequent adoption of the system with the optimum performance. It also allows the uncertainty contributions introduced by a particular detection system to be calculated and used in the estimation of the combined uncertainty of the measurement in which that detection system is being used. The Optical Metrology Group at the National Physical Laboratory (NPL) has assembled dedicated facilities, which are able to characterise the critical operating parameters of photon counting systems anywhere in the 250 nm to 1600 nm wavelength region. These include the absolute and relative spectral responsivity over the wavelength range of interest, the spatial uniformity of response at the wavelengths of interest, the deviation from a true linear response as a function of incident radiant power/irradiance and the stability of response as a function of time or ageing. Using these facilities, the performance of a number of photon counting systems has been evaluated in an effort to identify the most appropriate detector technologies for the various radiometric applications NPL is currently addressing. This document describes the dedicated facilities which exist at NPL and highlights how they are being used to provide traceable measurements of the key performance parameters of photon counting systems. Examples of characterisations of photon counting systems are presented.

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Evangelos Theocharous, Jessica Cheung, and Christopher Chunnilall "Characterisation of photon counting systems at NPL", Proc. SPIE 7681, Advanced Photon Counting Techniques IV, 768105 (27 April 2010); https://doi.org/10.1117/12.851861

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