Experimental implementation of quantum entanglement and hyperentanglement with a fiber-based two-photon source

Jun Chen; Matthew D. Eisaman; Elizabeth Goldschmidt; Jingyun Fan; Alan Migdall

doi:10.1117/12.794782

5 September 2008 Experimental implementation of quantum entanglement and hyperentanglement with a fiber-based two-photon source

Jun Chen, Matthew D. Eisaman, Elizabeth Goldschmidt, Jingyun Fan, Alan Migdall

Author Affiliations +

Proceedings Volume 7092, Quantum Communications and Quantum Imaging VI; 709209 (2008) https://doi.org/10.1117/12.794782
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Jun Chen, Matthew D. Eisaman, Elizabeth Goldschmidt, Jingyun Fan, and Alan Migdall "Experimental implementation of quantum entanglement and hyperentanglement with a fiber-based two-photon source", Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 709209 (5 September 2008); https://doi.org/10.1117/12.794782

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