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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 10 — May. 15, 2009
  • pp: 1606–1608

Polarization-independent, differential-phase-shift, quantum-key distribution system using upconversion detectors

Yuki Iwai, Toshimori Honjo, Kyo Inoue, Hidehiko Kamada, Yoshiki Nishida, Osamu Tadanaga, and Masaki Asobe  »View Author Affiliations


Optics Letters, Vol. 34, Issue 10, pp. 1606-1608 (2009)
http://dx.doi.org/10.1364/OL.34.001606


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Abstract

We propose and demonstrate a polarization-independent, differential-phase-shift, quantum-key distribution system with upconversion detectors. Even though the detectors have polarization dependency, use of alternative polarization modulation and a two-bit delay interferometer achieves polarization-insensitive operation. In an experiment, sifted key bits were polarization-independently generated over 50 km fiber.

© 2009 Optical Society of America

OCIS Codes
(270.5570) Quantum optics : Quantum detectors
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

History
Original Manuscript: January 27, 2009
Revised Manuscript: March 17, 2009
Manuscript Accepted: April 14, 2009
Published: May 15, 2009

Citation
Yuki Iwai, Toshimori Honjo, Kyo Inoue, Hidehiko Kamada, Yoshiki Nishida, Osamu Tadanaga, and Masaki Asobe, "Polarization-independent, differential-phase-shift, quantum-key distribution system using upconversion detectors," Opt. Lett. 34, 1606-1608 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-10-1606


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