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Optics Letters

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  • Vol. 29, Iss. 23 — Dec. 1, 2004
  • pp: 2797–2799

Differential-phase-shift quantum key distribution experiment with a planar light-wave circuit Mach-Zehnder interferometer

T. Honjo, K. Inoue, and H. Takahashi  »View Author Affiliations


Optics Letters, Vol. 29, Issue 23, pp. 2797-2799 (2004)
http://dx.doi.org/10.1364/OL.29.002797


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Abstract

A differential-phase-shift quantum key distribution experiment was carried out with a planar light-wave circuit (PLC) Mach–Zehnder interferometer. This scheme has two advantages: it requires no polarization control and has a high repetition frequency, provided that a stable interferometer is available. Stable polarization-insensitive operation was achieved with an interferometer fabricated by PLC technology. Raw key creation at a rate of 3076 bits/s with a 5.0% quantum bit-error rate was achieved over 20 km of fiber. The stability of the PLC interferometer was examined.

© 2004 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics

Citation
T. Honjo, K. Inoue, and H. Takahashi, "Differential-phase-shift quantum key distribution experiment with a planar light-wave circuit Mach-Zehnder interferometer," Opt. Lett. 29, 2797-2799 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-23-2797


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