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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 8 — Apr. 17, 2006
  • pp: 3453–3460

Long-distance distribution of time-bin entanglement generated in a cooled fiber

Hiroki Takesue  »View Author Affiliations

Optics Express, Vol. 14, Issue 8, pp. 3453-3460 (2006)

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This paper reports the first demonstration of the generation and distribution of time-bin entangled photon pairs in the 1.5-μm band using spontaneous four-wave mixing in a cooled fiber. Noise photons induced by spontaneous Raman scattering were suppressed by cooling a dispersion shifted fiber with liquid nitrogen, which resulted in a significant improvement in the visibility of two-photon interference. By using this scheme, time-bin entangled qubits were successfully distributed over 60 km of optical fiber with a visibility of 76%, which was obtained without removing accidental coincidences.

© 2006 Optical Society of America

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(270.0270) Quantum optics : Quantum optics

ToC Category:
Nonlinear Optics

Original Manuscript: February 10, 2006
Revised Manuscript: April 6, 2006
Manuscript Accepted: April 11, 2006
Published: April 17, 2006

Hiroki Takesue, "Long-distance distribution of time-bin entanglement generated in a cooled fiber," Opt. Express 14, 3453-3460 (2006)

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Fig. 1. Fig. 2. Fig. 3.

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