Source of polarization entanglement in a single periodically poled KTiOPO4 crystal with overlapping emission cones | Zendy

Marco Fiorentino | Zendy; Christopher E. Kuklewicz | Zendy; Franco N. C. Wong | Zendy

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Source of polarization entanglement in a single periodically poled KTiOPO4 crystal with overlapping emission cones

Author(s) -

Marco Fiorentino,

Christopher E. Kuklewicz,

Franco N. C. Wong

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.000127

Subject(s) - optics , polarization (electrochemistry) , physics , phase matching , photon , spontaneous parametric down conversion , quantum entanglement , laser , quantum , quantum mechanics , chemistry

We present a simple polarization entanglemenet source based on type-II phase-matched parametric down-conversion in periodically poled KTiOPO4. By use of noncritical phase matching in a noncollinear geometry the single-crystal source emits a cone of polarization-entangled photons. Two beams on opposite sides of the cone are selected for measurements to yield an observed flux of 820 pairs/s per mW of pump power with a two-photon fringe visibility of 96%. With this source we measure a violation of Bell's inequality of 140 standard deviations in 160 s.

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