Practical gigahertz quantum key distribution based on avalanche photodiodes

作者： Z L Yuan , A R Dixon , J F Dynes , A W Sharpe , A J Shields

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摘要: We report in this paper a gigahertz clocked quantum key distribution (QKD) system using only practical components. Compact semiconductor avalanche photodiodes are used for high-speed single photon detection, whereas an attenuated laser is as light source combination with the decoy protocol guarding against photon-number-splitting attacks. The characterized by secure rates of 1.02 Mbit s−1 fibre distance 20 km and 10.1 kbit s−1 100 km. suitability standard mode fibres channel also demonstrated.