Absolute efficiency estimation of photon-number-resolving detectors using twin beams
A. P. Worsley, H. B. Coldenstrodt-Ronge, J. S. Lundeen, P. J. Mosley,, B. J. Smith, G. Puentes, N. Thomas-Peter, and I. A. Walmsley
TL;DR
This paper presents a method for absolute efficiency calibration of photon-number-resolving detectors using nonclassical twin beams, extending Klyshko's approach to improve robustness and dynamic range.
Contribution
It generalizes Klyshko's calibration method for single-photon detectors to photon-number-resolving detectors, enabling use with brighter sources and enhancing measurement reliability.
Findings
Successful experimental calibration of photon-number-resolving detectors
Use of brighter twin-beam sources increases measurement robustness
Extension of Klyshko's method to higher dynamic range detectors
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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