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4 papers · 2 filters
Distribution of Time-Energy Entanglement over 100 km fiber using superconducting single-photon detectors
Qiang Zhang, Hiroki Takesue, Sae Woo Nam +4
In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically pole…
Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
Hiroki Takesue, Sae Woo Nam, Qiang Zhang +4
Quantum key distribution (QKD) offers an unconditionally secure means of communication based on the laws of quantum mechanics. Currently, a major challenge is to achieve a QKD syst…
Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock
Qiang Zhang, Xiuping Xie, Hiroki Takesue +4
We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5…
Low Timing Jitter Detector for Gigahertz Quantum Key Distribution
R. J. Collins, R. H. Hadfield, V. Fernandez +2
A superconducting single-photon detector based on a niobium nitride nanowire is demonstrated in an optical-fibre-based quantum key distribution test bed operating at a clock rate o…