3 November 2016 Fiber-based frequency-degenerate polarization-entanglement photon pair sources for information encoding
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We propose and experimentally demonstrate a generation scheme of telecom-band fiber-based frequency-degenerate polarization-entanglement photon pair source. Basing on the vector spontaneous four wave mixing process in a Sagnac fiber loop along the clockwise and counter-clockwise directions, two frequency-degenerate and polarization orthogonal biphoton states generate and then lead to the polarization entanglement states by the interference at the beamsplitter. The raw fringe visibilities of the two-photon interferences are 97% and 92%, respectively. Information can be encoded on the generated photon pairs using the polarization entangled Bell states. It is demonstrated by a simplified Bell state measurement with a fringe visibility of 83%.
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Feng Zhu, Feng Zhu, Wei Zhang, Wei Zhang, Yidong Huang, Yidong Huang, } "Fiber-based frequency-degenerate polarization-entanglement photon pair sources for information encoding", Proc. SPIE 10029, Quantum and Nonlinear Optics IV, 100290O (3 November 2016); doi: 10.1117/12.2247563; https://doi.org/10.1117/12.2247563

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