Quantum entanglement distribution with 810 nm photons through active telecommunication fibers

Details Quantum entanglement distribution with 810 nm photons through active telecommunication fibers Quantum entanglement distribution with 810 nm photons through active telecommunication fibers

2011-09-12

arxiv.org/abs/1109.2519v2

Physics

Quantum Physics

Scientific paper

10.1364/OE.19.020597

We demonstrate the distribution of polarization-entangled photons for the purpose of quantum key distribution (QKD) along active telecom fibers. Entangled photon pairs of 810 nm wavelength generated by a Sagnac interferometer source were coupled into standard telecom single mode fibers. The fibers were either dark or carrying a standardized 1550 nm ethernet signals (1000BASE-ZX) with a nominal speed of 1 GBps from regular media converter devices, without any requirements on the optical power or spectrum transmitted. Our system demonstrates a QKD network covering 6 km in distance with a central service provider for classical and quantum data.

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