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• W2212481012 abstract "We investigate theoretically the spontaneous four-wave mixing (FWM) process that occurs in optical waveguides,as a source of quantum correlated photon-pairs. We consider that the waveguide used to implement the spontaneousFWM process presents a high value of nonlinear parameter, γ = 93.4 W-1m-1, and a non-negligible valueof loss coefficient, α = 133.3 dB/m. Moreover, the theoretical model also consider the Raman scattering thatinevitably accompanies the FWM process, and generates time-uncorrelated (noise) photon pairs. We use thecoincident-to-accidental ratio (CAR) as a figure of merit of the photon pair source, and we were able to observea CAR of the order of 65 in a high loss regime. After, we use the time-correlated photon pairs generated by thespontaneous FWM process to implement a heralded single photon source at waveguide output. In this scenario,the detection of one photon of the pair heralds the presence of the other photon. The quality of the source wasstudied by the evaluation of the second order coherence function for one photon of the pair conditioned by thedetection of its twin photon. We observe that the presence of a high loss coefficient tends to improve the qualityof the photon source, when compared with the lossless regime, even considering the Raman noise photons. Weobtain a value for the conditional second order coherence function of the order of 0.11 in absence of loss, and avalue of 0.03 for a loss coefficient of 133.3 dB/m." @default.
• W2212481012 created "2016-06-24" @default.
• W2212481012 creator A5076838839 @default.
• W2212481012 creator A5083719775 @default.
• W2212481012 date "2015-10-13" @default.
• W2212481012 modified "2023-10-16" @default.
• W2212481012 title "Heralded single-photon source from spontaneous four-wave mixing process in lossy waveguides" @default.
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• W2212481012 doi "https://doi.org/10.1117/12.2190190" @default.
• W2212481012 hasPublicationYear "2015" @default.
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