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Proceedings Paper

High speed fiber-based quantum key distribution using polarization encoding
Author(s): Xiao Tang; Lijun Ma; Alan Mink; Anastase Nakassis; Barry Hershman; Joshua Bienfang; Ronald F. Boisvert; Charles Clark; Carl Williams
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Paper Abstract

We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled by a pair of custom data handling circuit boards. As a complete system using a clock rate of 1.25 Gbit/s, it produces sifted keys at a rate of 1.1 Mb/s with an error rate lower than 1.3% while operating at a transmission rate of 312.5 Mbit/s and a mean photon number μ = 0.1. With a number of proposed improvements this system has a potential for a higher key rate without an elevated error rate.

Paper Details

Date Published: 25 August 2005
PDF: 9 pages
Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 58931A (25 August 2005); doi: 10.1117/12.614598
Show Author Affiliations
Xiao Tang, National Institute of Standards and Technology (United States)
Lijun Ma, National Institute of Standards and Technology (United States)
Alan Mink, National Institute of Standards and Technology (United States)
Anastase Nakassis, National Institute of Standards and Technology (United States)
Barry Hershman, National Institute of Standards and Technology (United States)
Joshua Bienfang, National Institute of Standards and Technology (United States)
Ronald F. Boisvert, National Institute of Standards and Technology (United States)
Charles Clark, National Institute of Standards and Technology (United States)
Carl Williams, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 5893:
Quantum Communications and Quantum Imaging III
Ronald E. Meyers; Yanhua Shih, Editor(s)

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