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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 25 — Dec. 16, 2013
  • pp: 31395–31401

Maintenance-free operation of WDM quantum key distribution system through a field fiber over 30 days

Ken-ichiro Yoshino, Takao Ochi, Mikio Fujiwara, Masahide Sasaki, and Akio Tajima  »View Author Affiliations

Optics Express, Vol. 21, Issue 25, pp. 31395-31401 (2013)

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Maintenance-free wavelength-division-multiplexing quantum key distribution for 30 days was achieved through a 22-km field fiber. Using polarization-independent interferometers and stabilization techniques, we attained a quantum bit error rate as low as 1.70% and an estimated secure key rate as high as 112.4 kbps for a record-breaking 291.3 Gbits of estimated secure keys accumulated over an uninterrupted operation period.

© 2013 Optical Society of America

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 10, 2013
Revised Manuscript: October 31, 2013
Manuscript Accepted: December 4, 2013
Published: December 12, 2013

Ken-ichiro Yoshino, Takao Ochi, Mikio Fujiwara, Masahide Sasaki, and Akio Tajima, "Maintenance-free operation of WDM quantum key distribution system through a field fiber over 30 days," Opt. Express 21, 31395-31401 (2013)

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