Quantum entanglement distribution with 810 nm photons through telecom fibers

Details Quantum entanglement distribution with 810 nm photons through telecom fibers Quantum entanglement distribution with 810 nm photons through telecom fibers

2010-07-26

arxiv.org/abs/1007.4495v1

Appl. Phys. Lett. Vol 97, 031117 (2010)

Physics

Quantum Physics

5 pages, 5 figures, 1 table

Scientific paper

10.1063/1.3460920

We demonstrate the distribution of polarization entangled photons of wavelength 810 nm through standard telecom fibers. This technique allows quantum communication protocols to be performed over established fiber infrastructure, and makes use of the smaller and better performing setups available around 800 nm, as compared to those which use telecom wavelengths around 1550 nm. We examine the excitation and subsequent quenching of higher-order spatial modes in telecom fibers up to 6 km in length, and perform a distribution of high quality entanglement (visibility 95.6%). Finally, we demonstrate quantum key distribution using entangled 810 nm photons over a 4.4 km long installed telecom fiber link.

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