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Frontiers in Optics

Ultra Stable All-Fiber Telecom-Band Entangled Photon-Pair Source for Turnkey Quantum Communication Applications

Chuang Liang, Kim Fook Lee, Todd Levin, Jun Chen, Prem Kumar

Published Jan 1, 2006• 2 citations
Publisher

Abstract

We demonstrate a novel alignment-free all-fiber source for generating telecom-band polarization-entangled photon pairs. Up to 91.7% two-photon-interference visibility is observed without subtracting accidental coincidences arising from background photons while operating the source at room temperature.
DOI
10.1364/fio.2006.fthi3

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We demonstrate a novel alignment-free all-fiber source for generating telecom-band polarization-entangled photon pairs. Polarization entanglement is created by injecting two relatively delayed, orthogonally polarized pump pulses into a piece of dispersion-shifted fiber, where each one independently engages in four-photon scattering, and then removing any distinguishability between the correlated photon-pairs produced by each pulse at the fiber output. Our scheme uses a Michelson-interferometer configuration with Faraday mirrors to achieve practically desirable features such as ultra-stable performance and turnkey operation. Up to 91.7% two-photon-interference visibility is observed without subtracting the accidental coincidences that arise from background photons while operating the source at room temperature.
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