Noise reduction in photon counting by exploiting spatial correlations
Abstract
Joint photocount distributions of a weak twin beam acquired by an iCCD camera are analyzed with respect to the beam spatial correlations. A method for extracting these correlations from the experimental joint photocount distributions is suggested using a suitable statistical model that quantifies the contribution of spatial correlations to the joint photocount distributions. In detail, the profile of twin-beam intensity spatial cross-correlation function is revealed from the curve that gives the genuine mean photon-pair number (both photons from a pair are detected) as a function of the extent of the detection area. Also, the principle of reducing the noise in photon-number-resolving detection by using spatial correlations is experimentally demonstrated.
Cite
@article{arxiv.1710.06354,
title = {Noise reduction in photon counting by exploiting spatial correlations},
author = {Jan Perina and Vaclav Michalek and Ondrej Haderka},
journal= {arXiv preprint arXiv:1710.06354},
year = {2018}
}
Comments
12 pages, 16 figures