K. A. Patel, J. F. Dynes, I. Choi, A. W. Sharpe, A. R. Dixon, Z. Yuan, R. Penty, and A. J. Shields, "Multiplexed Classical and Quantum Transmission for High Bitrate Quantum Key Distribution Systems,"
in Conference on Lasers and Electro-Optics 2012,
OSA Technical Digest
(Optical Society of America, 2012), paper QM2H.5.
We report the operation of a gigahertz clocked quantum key distribution system, with two classical data communication channels using coarse wavelength division multiplexing over a record fibre distance of 80km.