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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 11 — Jun. 2, 2003
  • pp: 1303–1309

After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution

A. Yoshizawa, R. Kaji, and H. Tsuchida  »View Author Affiliations

Optics Express, Vol. 11, Issue 11, pp. 1303-1309 (2003)

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We demonstrate fiber-optic quantum key distribution (QKD) at 1550 nm using single-photon detectors operating at 5 MHz. Such high-speed single-photon detectors are essential to the realization of efficient QKD. However, after-pulses increase bit errors. In the demonstration, we discard after-pulses by measuring time intervals of detection events. For a fiber length of 10.5 km, we have achieved a key rate of 17 kHz with an error of 2%.

© 2003 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(270.0270) Quantum optics : Quantum optics

ToC Category:
Research Papers

Original Manuscript: April 16, 2003
Revised Manuscript: May 16, 2003
Published: June 2, 2003

Akio Yoshizawa, R. Kaji, and H. Tsuchida, "After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution," Opt. Express 11, 1303-1309 (2003)

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