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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 13073–13082

100 km differential phase shift quantum key distribution experiment with low jitter up-conversion detectors

Eleni Diamanti, Hiroki Takesue, Carsten Langrock, M. M. Fejer, and Yoshihisa Yamamoto  »View Author Affiliations

Optics Express, Vol. 14, Issue 26, pp. 13073-13082 (2006)

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We present a quantum key distribution experiment in which keys that were secure against all individual eavesdropping attacks allowed by quantum mechanics were distributed over 100 km of optical fiber. We implemented the differential phase shift quantum key distribution protocol and used low timing jitter 1.55 µm single-photon detectors based on frequency up-conversion in periodically poled lithium niobate waveguides and silicon avalanche photodiodes. Based on the security analysis of the protocol against general individual attacks, we generated secure keys at a practical rate of 166 bit/s over 100 km of fiber. The use of the low jitter detectors also increased the sifted key generation rate to 2 Mbit/s over 10 km of fiber.

© 2006 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5570) Quantum optics : Quantum detectors

ToC Category:
Quantum Optics

Original Manuscript: August 14, 2006
Revised Manuscript: November 8, 2006
Manuscript Accepted: November 8, 2006
Published: December 22, 2006

Eleni Diamanti, Hiroki Takesue, Carsten Langrock, M. M. Fejer, and Yoshihisa Yamamoto, "100 km differential phase shift quantum key distribution experiment with low jitter up-conversion detectors," Opt. Express 14, 13073-13082 (2006)

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