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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 6 — Mar. 15, 2007
  • pp: 698–700

Quantum key distribution based on phase encoding and polarization measurement

Hai-Qiang Ma, Jian-Ling Zhao, and Ling-An Wu  »View Author Affiliations

Optics Letters, Vol. 32, Issue 6, pp. 698-700 (2007)

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A one-way quantum key distribution scheme based on intrinsically stable Faraday-mirror-type Michelson interferometers with four-port polarizing beam splitters has been demonstrated that can compensate for birefringence effects automatically. The encoding is performed with phase modulators, but decoding is accomplished through measurement of the polarization state of Bob’s photons. An extinction ratio of about 30 dB was maintained for several hours over 50 km of fiber at 1310 nm without any adjustment to the setup, which shows its good potential for practical systems.

© 2007 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

Original Manuscript: October 24, 2006
Manuscript Accepted: November 22, 2006
Published: February 15, 2007

Hai-Qiang Ma, Jian-Ling Zhao, and Ling-An Wu, "Quantum key distribution based on phase encoding and polarization measurement," Opt. Lett. 32, 698-700 (2007)

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