Title :
Impact of FWM process on the statistics of a co-propagating quantum signal in a WDM lightwave system
Author :
Almeida, Álvaro J. ; Silva, Nuno A. ; André, Paulo S. ; Pinto, Armando N.
Author_Institution :
Inst. de Telecomun., Campus Univ. de Santiago, Aveiro, Portugal
Abstract :
We present an experimental characterization of the evolution of the photon statistics of a quantum signal, in a wavelength-division multiplexing (WDM) environment. We use an on/off avalanche photodetector operating in the Geiger mode to measure the photon counts, and the maximum-likelihood estimation (MLE) method and the expectation-maximization (EM) algorithm to reconstruct the photon statistics. We found that the statistics of the quantum signal changes from Poissonian to thermal when it contains only a few photons per pulse. When the quantum signal carries a higher number of photons per pulse, it is verified that its statistics remains Poissonian.
Keywords :
expectation-maximisation algorithm; stochastic processes; wavelength division multiplexing; FWM process; Geiger mode; Poissonian; WDM lightwave system; copropagating quantum signal; expectation-maximization algorithm; maximum likelihood estimation; on/off avalanche photodetector; photon statistics; wavelength division multiplexing environment; Maximum likelihood estimation; Optical fiber networks; Optical fibers; Photodetectors; Photonics; Wavelength division multiplexing; Avalanche Photodetector; Expectation-Maximization; Maximum-Likelihood Estimation; Optical Mixing; Photon Statistics; Quantum Communication;
Conference_Titel :
Transparent Optical Networks (ICTON), 2012 14th International Conference on
Conference_Location :
Coventry
Print_ISBN :
978-1-4673-2228-7
Electronic_ISBN :
2161-2056
DOI :
10.1109/ICTON.2012.6253799
