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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 13 — Jun. 23, 2008
  • pp: 9701–9707

A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths

S. Sauge, M. Swillo, M. Tengner, and A. Karlsson  »View Author Affiliations


Optics Express, Vol. 16, Issue 13, pp. 9701-9707 (2008)
http://dx.doi.org/10.1364/OE.16.009701


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Abstract

We demonstrate a bright, narrowband, compact, quasi-phasematched single-crystal source generating path-polarization-entangled photon pairs at 810 nm and 1550 nm at a maximum rate of 3×106 s-1 THz-1 mW-1 after coupling to single-mode fiber, and with two-photon interference visibility above 90%. While the source can already be used to implement quantum communication protocols such as quantum key distribution, this work is also instrumental for narrowband applications such as entanglement transfer from photonic to atomic qubits, or entanglement of photons from independent sources.

© 2008 Optical Society of America

OCIS Codes
(270.5565) Quantum optics : Quantum communications
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

History
Original Manuscript: May 16, 2008
Revised Manuscript: June 9, 2008
Manuscript Accepted: June 12, 2008
Published: June 17, 2008

Citation
S. Sauge, M. Swillo, M. Tengner, and A. Karlsson, "A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths," Opt. Express 16, 9701-9707 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-13-9701


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