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Proceedings Paper

Experimental implementation of quantum entanglement and hyperentanglement with a fiber-based two-photon source
Author(s): Jun Chen; Matthew D. Eisaman; Elizabeth Goldschmidt; Jingyun Fan; Alan Migdall
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Paper Abstract

We describe the generation of entangled and hyperentangled photon pairs using a microstructure-fiber Sagnac interferometer, which is formed by a polarizing beam splitter and a highly nonlinear microstructure fiber twisted by 90° from end to end. This interferometer allows two identical four-wave mixing processes to occur on the same fiber principal axis, ensuring perfect spatial and temporal mode matching of the two four-wave mixing outputs on the polarizing beam splitter to create entanglement over the entire four-wave mixing phase-matching spectral range. With an average pump power of 220 μW, we measure a two-photon coincidence rate of 1 kHz with ▵λ = 0.9 nm. Two-photon interference visibilities exceed 91% for polarization-entangled photon pairs generated from this source, and are > 84% for both time-bin and polarization degrees of freedom for hyperentangled photons, all without subtracting accidental coincidences.

Paper Details

Date Published: 5 September 2008
PDF: 9 pages
Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 709209 (5 September 2008); doi: 10.1117/12.794782
Show Author Affiliations
Jun Chen, National Institute of Standards and Technology (United States)
Univ. of Maryland, College Park (United States)
Matthew D. Eisaman, National Institute of Standards and Technology (United States)
Univ. of Maryland, College Park (United States)
Elizabeth Goldschmidt, National Institute of Standards and Technology (United States)
Univ. of Maryland, College Park (United States)
Jingyun Fan, National Institute of Standards and Technology (United States)
Univ. of Maryland, College Park (United States)
Alan Migdall, National Institute of Standards and Technology (United States)
Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 7092:
Quantum Communications and Quantum Imaging VI
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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