Distribution of Time-Energy Entanglement over 100 km fiber using superconducting single-photon detectors

Abstract

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 poled lithium niobate waveguide to generate the time-energy entanglement and superconducting single-photon detectors to detect the photon pairs after 100 km. We also demonstrate that the distributed photon pairs can still be useful for quantum key distribution and other quantum communication tasks.

6 pages, 3 figures

References in corpus (2)

• Free-Space distribution of entanglement and single photons over 144 km
• Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

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