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We report the operation of a gigahertz clocked quantum key distribution system featuring high composable and quantifiable security while maintaining more than 1 Mbit/s secure key rate over a 50 km quantum channel.
We report stable operation of a multi-user Quantum Access Network over more than 24 hours. We connect multiple quantum transmitters to a single quantum receiver by pre-compensating all phase and polarisation fluctuations.
A novel secure communication network with quantum key distribution in a metropolitan area is reported. Different QKD schemes are integrated to demonstrate secure TV conferencing over a distance 45km, stable long-term operation, and application to secure mobile phones.
We report the continuous operation of an actively stabilised gigahertz clocked quantum key distribution (QKD) system, with an average secure key rate of 1 Mbit/s over a distance of 50 km.
We demonstrate multi-gigahertz photon-counting at 1550nm using self-differencing In-GaAs APDs. The quantum efficiency is characterized as 23.5% at an after-pulse probability of 4.84%. The device will further increase the bit-rate for fiber quantum key distribution.
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