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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 14 — May. 10, 2013
  • pp: 3311–3317

High-speed free-space quantum key distribution system for urban daylight applications

M. J. García-Martínez, N. Denisenko, D. Soto, D. Arroyo, A. B. Orue, and V. Fernandez  »View Author Affiliations


Applied Optics, Vol. 52, Issue 14, pp. 3311-3317 (2013)
http://dx.doi.org/10.1364/AO.52.003311


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Abstract

We report a free-space quantum key distribution system designed for high-speed key transmission in urban areas. Clocking the system at gigahertz frequencies and efficiently filtering background enables higher secure key rates than those previously achieved by similar systems. The transmitter and receiver are located in two separate buildings 300 m apart in downtown Madrid and they exchange secure keys at rates up to 1 Mbps. The system operates in full bright daylight conditions with an average secure key rate of 0.5 Mbps and 24 h stability without human intervention.

© 2013 Optical Society of America

OCIS Codes
(060.2605) Fiber optics and optical communications : Free-space optical communication
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

History
Original Manuscript: February 19, 2013
Revised Manuscript: April 11, 2013
Manuscript Accepted: April 16, 2013
Published: May 7, 2013

Citation
M. J. García-Martínez, N. Denisenko, D. Soto, D. Arroyo, A. B. Orue, and V. Fernandez, "High-speed free-space quantum key distribution system for urban daylight applications," Appl. Opt. 52, 3311-3317 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-14-3311


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