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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9640–9649

A high-brightness source of polarization-entangled photons optimized for applications in free space

Fabian Steinlechner, Pavel Trojek, Marc Jofre, Henning Weier, Daniel Perez, Thomas Jennewein, Rupert Ursin, John Rarity, Morgan W. Mitchell, Juan P. Torres, Harald Weinfurter, and Valerio Pruneri  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 9640-9649 (2012)
http://dx.doi.org/10.1364/OE.20.009640


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Abstract

We present a simple but highly efficient source of polarization-entangled photons based on spontaneous parametric down-conversion (SPDC) in bulk periodically poled potassium titanyl phosphate crystals (PPKTP) pumped by a 405 nm laser diode. Utilizing one of the highest available nonlinear coefficients in a non-degenerate, collinear type-0 phase-matching configuration, we generate polarization entanglement via the crossed-crystal scheme and detect 0.64 million photon pair events/s/mW, while maintaining an overlap fidelity with the ideal Bell state of 0.98 at a pump power of 0.025 mW.

© 2012 OSA

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

History
Original Manuscript: February 15, 2012
Revised Manuscript: March 22, 2012
Manuscript Accepted: March 24, 2012
Published: April 12, 2012

Citation
Fabian Steinlechner, Pavel Trojek, Marc Jofre, Henning Weier, Daniel Perez, Thomas Jennewein, Rupert Ursin, John Rarity, Morgan W. Mitchell, Juan P. Torres, Harald Weinfurter, and Valerio Pruneri, "A high-brightness source of polarization-entangled photons optimized for applications in free space," Opt. Express 20, 9640-9649 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-9640


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