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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 15 — Jul. 21, 2008
  • pp: 11354–11360

Ultra fast quantum key distribution over a 97 km installed telecom fiber with wavelength division multiplexing clock synchronization

Akihiro Tanaka, Mikio Fujiwara, Sae Woo Nam, Yoshihiro Nambu, Seigo Takahashi, Wakako Maeda, Ken-ichiro Yoshino, Shigehito Miki, Burm Baek, Zhen Wang, Akio Tajima, Masahide Sasaki, and Akihisa Tomita  »View Author Affiliations


Optics Express, Vol. 16, Issue 15, pp. 11354-11360 (2008)
http://dx.doi.org/10.1364/OE.16.011354


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Abstract

We demonstrated ultra fast BB84 quantum key distribution (QKD) transmission at 625 MHz clock rate through a 97 km field-installed fiber using practical clock synchronization based on wavelength-division multiplexing (WDM). We succeeded in over-one-hour stable key generation at a high sifted key rate of 2.4 kbps and a low quantum bit error rate (QBER) of 2.9%. The asymptotic secure key rate was estimated to be 0.78–0.82 kbps from the transmission data with the decoy method of average photon numbers 0, 0.15, and 0.4 photons/pulse.

© 2008 Optical Society of America

OCIS Codes
(060.5565) Fiber optics and optical communications : Quantum communications
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

History
Original Manuscript: May 14, 2008
Revised Manuscript: June 15, 2008
Manuscript Accepted: July 10, 2008
Published: July 14, 2008

Citation
Akihiro Tanaka, Mikio Fujiwara, Sae W. Nam, Yoshihiro Nambu, Seigo Takahashi, Wakako Maeda, Ken-ichiro Yoshino, Shigehito Miki, Burm Baek, Zhen Wang, Akio Tajima, Masahide Sasaki, and Akihisa Tomita, "Ultra fast quantum key distribution over a 97 km installed telecom fiber with wavelength division multiplexing clock synchronization," Opt. Express 16, 11354-11360 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-15-11354


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