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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 1 — Jan. 1, 2013
  • pp: 73–75

Generation of high-purity entangled photon pair in a short highly nonlinear fiber

Yong Meng Sua, John Malowicki, Masaaki Hirano, and Kim Fook Lee  »View Author Affiliations


Optics Letters, Vol. 38, Issue 1, pp. 73-75 (2013)
http://dx.doi.org/10.1364/OL.38.000073


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Abstract

We generate photon pairs at telecom wavelength through a spontaneous four-wave mixing process in a short 10 m of highly nonlinear fiber. We use a counterpropagating scheme to generate a correlated and entangled photon pair. We observe coincidence to accidental-coincidence ratio of 29±3 at room temperature (300 K) and as high as 130±5 when the fiber is cooled to liquid-nitrogen temperature (77 K). Two-photon interference with visibility >98% (>92%) and the violation of Bell’s inequality by >12 (5) standard deviation are observed at 77 K (300 K), respectively, without subtracting accidental-coincidence count. We obtain a photon-pair production rate about factor 3(2) higher than a 300 m dispersion-shifted fiber at 300 K (77 K).

© 2012 Optical Society of America

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Nonlinear Optics

History
Original Manuscript: October 29, 2012
Revised Manuscript: December 3, 2012
Manuscript Accepted: December 4, 2012
Published: December 20, 2012

Citation
Yong Meng Sua, John Malowicki, Masaaki Hirano, and Kim Fook Lee, "Generation of high-purity entangled photon pair in a short highly nonlinear fiber," Opt. Lett. 38, 73-75 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-1-73


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