Mode expansion and Bragg filtering enable a high-fidelity fiber-based photon-pair source

Details Mode expansion and Bragg filtering enable a high-fidelity fiber-based photon-pair source Mode expansion and Bragg filtering enable a high-fidelity fiber-based photon-pair source

2009-06-18

arxiv.org/abs/0906.3328v3

Physics

Quantum Physics

Manuscript was edited to provide additional information on the end-tapered photonic crystal fibers and high efficiency volume

Scientific paper

We report the development of a fiber-based single spatial mode source of photon-pairs where the efficiency of extracting photon-pairs is improved over a previous source [18] through the use of fiber-end expansion and Bragg filters. This improvement in efficiency enabled a spectrally bright and pure photon-pair source having a small second-order correlation function (0.03) and a raw spectral brightness of 44,700 pairs/(s nm mW). The source can be configured to generate entangled photon-pairs,characterized via optimal and minimal quantum state tomography, to have a fidelity of 97% and tangle of 92%, without subtracting any background.

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