|Title||High accuracy verification of a correlated-photon- based method for determining photoncounting detection efficiency|
|Publication Type||Journal Article|
|Year of Publication||2007|
|Authors||S. V. Polyakov, and A. L. Migdall|
|Keywords||2007, Metrology, Photon statistics, Quantum detectors, Single Fellow|
We have characterized an independent primary standard method to calibrate detection efficiency of photon-counting detectors based on twophoton correlations. We have verified this method and its uncertainty by comparing it to a substitution method using a conventionally calibrated transfer detector tied to a national primary standard detector scale. We obtained a relative standard uncertainty for the correlated-photon method of 0.18 % (k=1) and for the substitution method of 0.17 % (k=1). From a series of measurements we found that the two independent calibration techniques differ by 0.14 (14) %, which is within the established uncertainty of comparison. We believe this is the highest accuracy characterization and independent verification of the correlated-photon method yet achieved.