Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks

We demonstrate quantum key distribution (QKD) with bidirectional 10 Gb/s classical data channels in a single fiber using dense wavelength division multiplexing. Record secure key rates of 2.38 Mbps and fiber distances up to 70 km are achieved. Data channels are simultaneously monitored for error-fre...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (5)
Main Authors: Patel, K. A., Dynes, J. F., Lucamarini, M., Choi, I., Sharpe, A. W., Yuan, Z. L., Penty, R. V., Shields, A. J.
Format: Article
Language:English
Subjects:
Applied physics
Bandwidths
Channels
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DATA TRANSMISSION
Dense Wavelength Division Multiplexing
DISTANCE
Fiber optic networks
FIBERS
LASER RADIATION
Network switching
OPERATION
Quantum cryptography
QUANTUM INFORMATION
QUANTUM MECHANICS
Wave division multiplexing
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Summary:We demonstrate quantum key distribution (QKD) with bidirectional 10 Gb/s classical data channels in a single fiber using dense wavelength division multiplexing. Record secure key rates of 2.38 Mbps and fiber distances up to 70 km are achieved. Data channels are simultaneously monitored for error-free operation. The robustness of QKD is further demonstrated with a secure key rate of 445 kbps over 25 km, obtained in the presence of data lasers launching conventional 0 dBm power. We discuss the fundamental limit for the QKD performance in the multiplexing environment.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4864398