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Proceedings Paper

A novel switched interferometric quantum key distribution system
Author(s): P. A. Hiskett; C. G. Peterson; D. Rosenberg; S. Nam; A. E. Lita; A. J. Miller; R. J. Hughes; J. E. Nordholt
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Paper Abstract

A novel system for ultra-long-distance quantum key distribution in optical fiber, incorporating ultra-low-noise transition-edge sensor (TES) photodetectors, is described. Integration of the TES detectors into the system was facilitated with a unique optically switched interferometer design. The performance of the system over 101 km of dark, single-mode fiber at 1550 nm and a clock rate of 1 MHz is described. Secret-key bits were produced after error correction and privacy amplification when using mean photon numbers of 0.01, 0.0148, 0.02, 0.0304, and 0.2 photons/pulse at the output of the transmitter. At a mean photon number of 0.1 photons per pulse at the transmitter, a transmission line loss of 29.92 dB, roughly equivalent to 150 km of optical fiber, could be tolerated and secret bits extracted from the transmitted key.

Paper Details

Date Published: 25 September 2007
PDF: 12 pages
Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 67100S (25 September 2007); doi: 10.1117/12.733265
Show Author Affiliations
P. A. Hiskett, Los Alamos National Lab. (United States)
C. G. Peterson, Los Alamos National Lab. (United States)
D. Rosenberg, Los Alamos National Lab. (United States)
S. Nam, National Institute of Standards and Technology (United States)
A. E. Lita, National Institute of Standards and Technology (United States)
A. J. Miller, Albion College (United States)
R. J. Hughes, Los Alamos National Lab. (United States)
J. E. Nordholt, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 6710:
Quantum Communications and Quantum Imaging V
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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