2003/10/10 by J. Perina Jr, Jan Peřina, O. Haderka +6
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Advanced Optical Sensing Technologies #FOS: Physical sciences #Laser-Matter Interactions and Applications #Quantum Physics (quant-ph) #Spectroscopy Techniques in Biomedical and Chemical Research #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0310065
10 pages, 8 figures
arxiv created 2003/10/10 · openalex publication_date 2003/10/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Measurement of photon-number statistics of fields composed of photon pairs generated in spontaneous parametric downcoversion pumped by strong ultrashort pulses is described. Final detection quantum efficiencies, noises as well as possible loss of one or both photons from a pair are taken into account. Measured data provided by an intensified single-photon CCD camera are analyzed along the developed model. The joint signal-idler photon-number distribution is obtained using the expectation maximization algorithm. Covariance of the signal and idler photon-numbers equals 80 %. Statistics of the generated photon pairs are identified to be Poissonian in our case. Distribution of the integrated intensities of the signal and idler fields shows strong correlations between the fields. Negative values of this distribution occurring in some regions clearly demonstrate a nonclassical character of the light composed of photon pairs.