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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 2 — Jan. 19, 2009
  • pp: 1055–1063

Sagnac secret sharing over telecom fiber networks

Jan Bogdanski, Johan Ahrens, and Mohamed Bourennane  »View Author Affiliations


Optics Express, Vol. 17, Issue 2, pp. 1055-1063 (2009)
http://dx.doi.org/10.1364/OE.17.001055


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Abstract

We report the first Sagnac quantum secret sharing (in three-and four-party implementations) over 1550 nm single mode fiber (SMF) networks, using a single qubit protocol with phase encoding. Our secret sharing experiment has been based on a single qubit protocol, which has opened the door to practical secret sharing implementation over fiber telecom channels and in free-space. The previous quantum secret sharing proposals were based on multiparticle entangled states, difficult in the practical implementation and not scalable. Our experimental data in the three-party implementation show stable (in regards to birefringence drift) quantum secret sharing transmissions at the total Sagnac transmission loop distances of 55-75 km with the quantum bit error rates (QBER) of 2.3-2.4% for the mean photon number μ = 0.1 and 1.7-2.1% for μ = 0.3. In the four-party case we have achieved quantum secret sharing transmissions at the total Sagnac transmission loop distances of 45-55 km with the quantum bit error rates (QBER) of 3.0-3.7% for the mean photon number μ = 0.1 and 1.8-3.0% for μ = 0.3. The stability of quantum transmission has been achieved thanks to our new concept for compensation of SMF birefringence effects in Sagnac, based on a polarization control system and a polarization insensitive phase modulator. The measurement results have showed feasibility of quantum secret sharing over telecom fiber networks in Sagnac configuration, using standard fiber telecom components.

© 2009 Optical Society of America

OCIS Codes
(040.5570) Detectors : Quantum detectors
(060.4080) Fiber optics and optical communications : Modulation
(040.1345) Detectors : Avalanche photodiodes (APDs)
(270.5565) Quantum optics : Quantum communications
(270.5568) Quantum optics : Quantum cryptography
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Quantum Optics

History
Original Manuscript: October 1, 2008
Revised Manuscript: November 21, 2008
Manuscript Accepted: November 28, 2008
Published: January 15, 2009

Citation
Jan Bogdanski, Johan Ahrens, and Mohamed Bourennane, "Sagnac secret sharing over telecom fiber networks," Opt. Express 17, 1055-1063 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-2-1055


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