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Pulsed Sagnac source of polarization-entangled photon pairs in telecommunication band.

ABSTRACT: We report a source of polarization-entangled photon pairs in the 1550-nm telecommunication band, which is based on non-collinear spontaneous parametric down-conversion in a periodically poled lithium niobate crystal pumped by picosecond pulses. This source is realized utilizing a polarization-based Sagnac interferometer employing a type-0 non-collinear quasi-phase-matching configuration. Polarization entanglement is verified through measurement of the polarization-correlation interference fringes with visibility >96% and by testing the experimental violation of the Clauser-Horne-Shimony-Holt (CHSH) form of Bell's inequality. The CHSH-Bell parameter S is found to be 2.72?±?0.04, with 18 standard deviations from the statistical uncertainty.

SUBMITTER: Kim H

PROVIDER: S-EPMC6430775 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

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Pulsed Sagnac source of polarization-entangled photon pairs in telecommunication band.

Kim Heonoh H Kwon Osung O Moon Han Seb HS

Scientific reports 20190322 1

We report a source of polarization-entangled photon pairs in the 1550-nm telecommunication band, which is based on non-collinear spontaneous parametric down-conversion in a periodically poled lithium niobate crystal pumped by picosecond pulses. This source is realized utilizing a polarization-based Sagnac interferometer employing a type-0 non-collinear quasi-phase-matching configuration. Polarization entanglement is verified through measurement of the polarization-correlation interference fringe ...[more]

PMID: 30903029

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