An integrable optical-fiber source of polarization entangled photon-pairs in the telecom band

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dc.creatorLi, Xiaoying
dc.creatorLiang, Chuang
dc.creatorLee, Kim Fook
dc.creatorChen, Jun
dc.creatorVoss, Paul L.
dc.creatorKumar, Prem
dc.date2006-01-13
dc.date.accessioned2026-07-07T07:00:24Z
dc.date.available2026-07-07T07:00:24Z
dc.descriptionWe demonstrate an optical-fiber based source of polarization entangled photon-pairs with improved quality and efficiency, which has been integrated with off-the-shelf telecom components and is, therefore, well suited for quantum communication applications in the 1550 nm telecom band. Polarization entanglement is produced by simultaneously pumping a loop of standard dispersion-shifted fiber with two orthogonally-polarized pump pulses, one propagating in the clockwise and the other in the counter-clockwise direction. We characterize this source by investigating two-photon interference between the generated signal-idler photon-pairs under various conditions. The experimental parameters are carefully optimized to maximize the generated photon-pair correlation and to minimize contamination of the entangled photon-pairs from extraneously scattered background photons that are produced by the pump pulses for two reasons: i) spontaneous Raman scattering causes uncorrelated photons to be emitted in the signal/idler bands and ii) broadening of the pump-pulse spectrum due to self-phase modulation causes pump photons to leak into the signal/idler bands. We obtain two-photon interference with visibility $>90$% without subtracting counts caused by the background photons (only dark counts of the detectors are subtracted), when the mean photon number in the signal (idler) channel is about 0.02/pulse, while no interference is observed in direct detection of either the signal or the idler photons.
dc.description4 figures, submitted to Phys. Rev. A
dc.identifierhttps://arxiv.org/abs/quant-ph/0601087
dc.identifierhttp://arxiv.org/abs/quant-ph/0601087
dc.identifierPhy. Rev. A. Vol. 73, 052301 (2006)
dc.identifierdoi:10.1103/PhysRevA.73.052301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108022
dc.subjectQuantum Physics
dc.titleAn integrable optical-fiber source of polarization entangled photon-pairs in the telecom band
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