Continuous operation of a one-way quantum key distribution system over installed telecom fibre

Details Continuous operation of a one-way quantum key distribution system over installed telecom fibre Continuous operation of a one-way quantum key distribution system over installed telecom fibre

2005-01-26

arxiv.org/abs/quant-ph/0501160v2

Optics Express 13, 660-665(2005)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1364/OPEX.13.000660

We demonstrate a robust, compact and automated quantum key distribution system, based upon a one-way Mach-Zender interferometer, which is actively compensated for temporal drifts in the photon phase and polarization. The system gives a superior performance to passive compensation schemes with an average quantum bit error rate of 0.87% and a duty cycle of 99.6% for a continuous quantum key distribution session of 19 hours over a 20.3km installed telecom fibre. The results suggest that actively compensated QKD systems are suitable for practical applications.

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