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We have demonstrated a high-flux source of polarization-entangled photonsusing a type-II phase-matched periodically-poled KTP parametric downconverterin a collinearly propagating configuration. We have observed quantuminterference between the single-beam downconverted photons with a visibility of99% and a measured coincidence flux of 300/s/mW of pump. TheClauser-Horne-Shimony-Holt version of Bell's inequality was violated with avalue of 2.711 +/- 0.017.Comment: 7 pages submitted to Physical Review

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

High-flux source of polarization-entangled photons from a periodically poled<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">KTiOPO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>parametric down-converter

High-flux source of polarization-entangled photons from a periodically poledKTiOPO4parametric down-converter