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Four-Wave Mixing: Photon Statistics and the Impact on a Co-Propagating Quantum Signal

Almeida, A. ; Silva, N. A. ; André, P.S ; Pinto, A. N.

Optics Communications Vol. 285, Nº 12, pp. 2956 - 2960, June, 2012.

ISSN (print): 0030-4018
ISSN (online): 0030-4018

Journal Impact Factor: 1,552 (in 2008)

Digital Object Identifier: 10.1016/j.optcom.2012.02.008

We reconstruct the photon statistics of a single-photon source based on the stimulated four-wave mixing (FWM) process. We find
that the statistics of the source goes from thermal, at a low power regime, to Poissonian, at a high power regime. We also study the
impact of the FWM process on a co-propagating coherent quantum signal in a wavelength-division multiplexed (WDM) lightwave
system. The statistics of the quantum signal changes from Poissonian to thermal when a low power is used, and remains Poissonian
for an higher power. A multithermal regime is also observed when a moderate power is used.