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Production of degenerate polarisation entangled photon pairs in the telecoms band from a pump enhanced parametric downconversion process.

Thomas. P J,, ; Chunnilall, C J; Stothard, D J M*; Walsh, D A*; Dunn, M H* (2010) Production of degenerate polarisation entangled photon pairs in the telecoms band from a pump enhanced parametric downconversion process. Opt. Express, 18 (25). pp. 26600-26612.

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Abstract

The design and implementation of a novel source of degenerate polarization entangled photon pairs in the telecom band, based on a cavity enhanced parametric downconversion process, is presented. Two of the four maximally entangled Bell states are produced; the remaining two are obtainable by the addition of a half wave plate into the setup. The coincident photon detection rate in the A/D basis between two detectors at the output of the device revealed the production of highly entangled states, resulting in quantum interference visibilities of 0.971 ± 0.041 (f = 0 state) and 0.932 ± 0.036 (f = p state) respectively. The entangled states were found to break the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality by around 6 standard deviations. From the measured coincidence counting rates and the optical system losses, an entangled photon pair production rate of 8.9 ´ 104 s-1 mW-1 pump was estimated.

Item Type: Article
Keywords: entangled photons, telecom, parametric downconversion, photon statistics
Subjects: Optical Radiation and Photonics
Quantum Phenomena
Optical Radiation and Photonics > Few Photon Science
Quantum Phenomena > Quantum Information Processing and Communication
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4821

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