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All-optically tunable buffer for single photons

Stéphane Clemmen, Alessandro Farsi, Sven Ramelow, and Alexander L. Gaeta

Abstract

We demonstrate a photon buffer for quantum communication systems via a quantum frequency conversion–dispersion technique based on Bragg scattering four-wave mixing. The all-fiber setup is capable of imparting all-optical and continuously tunable delays onto single photons with minimal photon noise and absorption. Tunable delays up to 23 times the photon duration are demonstrated with on/off efficiencies as high as 55%.

© 2018 Optical Society of America

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