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Proceedings Paper

Quantum key distribution at GHz transmission rates
Author(s): Alessandro Restelli; Joshua C. Bienfang; Alan Mink; Charles W. Clark
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Paper Abstract

Quantum key distribution (QKD) channels are typically realized by transmitting and detecting single photons, and therefore suffer from dramatic reductions in throughput due to both channel loss and noise. These shortcomings can be mitigated by applying telecommunications clock-recovery techniques to maximize the bandwidth of the single-photon channel and minimize the system's exposure to noise. We demonstrate a QKD system operating continuously at a quantum-channel transmission rate of 1.25 GHz, with dedicated data-handling hardware and error-correction/privacy amplification. We discuss the design and performance of our system and highlight issues which limit our maximum transmission and key production rates.

Paper Details

Date Published: 26 January 2009
PDF: 7 pages
Proc. SPIE 7236, Quantum Communications Realized II, 72360L (26 January 2009); doi: 10.1117/12.809461
Show Author Affiliations
Alessandro Restelli, National Institute of Standards and Technology (United States)
Univ. of Maryland (United States)
Joshua C. Bienfang, National Institute of Standards and Technology (United States)
Alan Mink, National Institute of Standards and Technology (United States)
Charles W. Clark, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 7236:
Quantum Communications Realized II
Yasuhiko Arakawa; Masahide Sasaki; Hideyuki Sotobayashi, Editor(s)

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