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RaT

Sensitivity of photodetectors for Poissonian and Gaussian photon statistics

V. B. Fedorov, V. G. Mityakov

Published Apr 1, 1985• 0 citations
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We discuss the statistics of Poissonian and thermal sources, and verify that as an approximation to a single-photon source, both Poissonian and thermal sources can be used, when the average number of photons per pulse is of the order of 0.1. An experimental characterization of the photon statistics of a single-photon source obtained from the four-wave mixing (FWM) process in optical fibers is presented. We employ an on/off avalanche photodetector operating in the Geiger mode, and use the maximum-likelihood estimation (MLE) method and the expectation-maximization (EM) algorithm to reconstruct the data. We find that the statistics of the source goes from thermal, at a low signal power regime, to Poissonian, in a high signal power regime.

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The photon counting distribution for Gaussian light

T McLean

Physics Letters A•Apr 15, 1965•0 citations
We investigate the photon statistics of two-mode photon-subtracted squeezed vacuum states (TMPSSV), which are important factors to affect the sensitivity and resolution of optical interferometers. The comparison between the photon statistics of TMPSSV and two-mode squeezed vacuum states (TMSV) shows that the non-Gaussian operation has the effect of narrowing the characteristic widths of photon number probability distributions. Different from the super-Poissonian statistical distribution of TMSV, when the initial squeezing parameter is lower, TMPSSV shows a sub-Poissonian statistical distribution which is desirable for enhancing the sensitivity and resolution of interferometers. Therefore, non-Gaussian entanglement based on TMPSSV provides a promising quantum resource for an ultra-sensitivity and super-resolution optical interferometer far beyond the standard quantum limit.
We discuss the statistics of Poissonian and thermal sources, and verify that as an approximation to a single-photon source, both Poissonian and thermal sources can be used, when the average number of photons per pulse is of the order of 0.1. An experimental characterization of the photon statistics of a single-photon source obtained from the four-wave mixing (FWM) process in optical fibers is presented. We employ an on/off avalanche photodetector operating in the Geiger mode, and use the maximum-likelihood estimation (MLE) method and the expectation-maximization (EM) algorithm to reconstruct the data. We find that the statistics of the source goes from thermal, at a low signal power regime, to Poissonian, in a high signal power regime.