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|Author(s):||Sergey V. Polyakov; Alan L. Migdall;|
|Title:||High Accuracy Verification of a Correlated-Photon-Based Method for Determining Photon-Counting Detection Efficiency|
|Published:||February 19, 2007|
|Abstract:||We have implemented and characterized an independent primary standard method for the calibration of detection efficiency of photon counting detectors. The method is based on a light source producing correlated photon pairs. We have determined, and most importantly, verified the detection efficiency uncertainty associated with this implementation of the two-photon method by comparing the measured efficiency to a detection efficiency determined by a substitution method using a conventionally calibrated transfer detector tied to a national primary standard detector, the NIST High Accuracy Cryogenic Radiometer. We obtained an absolute uncertainty of the correlated method of 0.18% (k=1) and an uncertainty of the conventional calibration of 0.17% (k=1). From a series of measurements we found that the two independent calibration techniques differ by 0.15% b0.14%, within the established uncertainty of comparison. We believe that this is the highest accuracy verification of the two-photon method yet achieved. We describe procedures and techniques used to perform calibrations and comparisons. Also presented are procedures for determining uncertainties of the both calibration methods.|
|Pages:||pp. 1390 - 1407|
|Keywords:||correlated photons,detector,down-conversion,high accuracy calibration,primary standard verification,single photon detector|
|Research Areas:||Single Photon Detectors, Correlated Photon Radiometry, Physics, Quantum Information Technology, Quantum Physics|
|PDF version:||Click here to retrieve PDF version of paper (198KB)|