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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 8 — Apr. 14, 2008
  • pp: 5776–5781

Distribution of Time-Energy Entanglement over 100 km fiber using superconducting single-photon detectors

Qiang Zhang, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, Xiuping Xie, Burm Baek, M. M. Fejer, and Yoshihisa Yamamoto  »View Author Affiliations

Optics Express, Vol. 16, Issue 8, pp. 5776-5781 (2008)

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In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically poled lithium niobate waveguide to generate the time-energy entanglement and superconducting single-photon detectors to detect the photon pairs after 100 km. We also demonstrate that the distributed photon pairs can still be useful for quantum key distribution and other quantum communication tasks.

© 2008 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Nonlinear Optics

Original Manuscript: January 2, 2008
Revised Manuscript: February 17, 2008
Manuscript Accepted: February 27, 2008
Published: April 10, 2008

Qiang Zhang, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, Xiuping Xie, Burm Baek, M. M. Fejer, and Yoshihisa Yamamoto, "Distribution of time-energy entanglement over 100 km fiber using superconducting singlephoton detectors," Opt. Express 16, 5776-5781 (2008)

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Fig. 1. Fig. 2. Fig. 4.

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