25 September 2007 Compact sources of correlated and entangled photons
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We present two experiments geared toward the realization of a robust and intense source of polarization-entangled photons. First, we describe a novel source of polarization-entangled pairs that uses periodically-poled potassium titanyl phosphate (PPKTP) and an interferometer based on polarization beam displacers. The source emits an intense flux of high-quality single-mode entangled photons and is stable, robust, and easy to align. Second, we report on sources of correlated photons generated in PPKTP waveguides. Waveguide sources of correlated pairs have been shown to generate high fluxes of pairs: we theoretically and experimentally investigate spontaneous parametric down-conversion generation of photon pairs in waveguides at different wavelengths.
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M. Fiorentino, S. M. Spillane, T. D. Roberts, R. G. Beausoleil, "Compact sources of correlated and entangled photons", Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 67100N (25 September 2007); doi: 10.1117/12.730526; https://doi.org/10.1117/12.730526

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