Absolute efficiency estimation of photon-number-resolving detectors using twin beams.

University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom.
Optics Express (Impact Factor: 3.55). 04/2009; 17(6):4397-411. DOI: 10.1364/OE.17.004397
Source: PubMed

ABSTRACT A nonclassical light source is used to demonstrate experimentally the absolute efficiency calibration of a photon-number-resolving detector. The photon-pair detector calibration method developed by Klyshko for single-photon detectors is generalized to take advantage of the higher dynamic range and additional information provided by photon-number-resolving detectors. This enables the use of brighter twin-beam sources including amplified pulse pumped sources, which increases the relevant signal and provides measurement redundancy, making the calibration more robust.

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