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Opt Lett. 2013 Mar 15;38(6):947-9. doi: 10.1364/OL.38.000947.

High-efficiency frequency conversion in the single-photon regime.

Author information

1
Centre for Ultrahigh bandwidth Devices for Optical Systems, Institute of Photonics and Optical Science, School of Physics, University of Sydney, Sydney, New South Wales, Australia. a.clark@physics.usyd.edu.au

Abstract

In this Letter we demonstrate frequency conversion in the single-photon regime through Bragg-scattering four-wave mixing with near-unit efficiency in a 750 m long commercially available dispersion-engineered highly nonlinear fiber, where all photons and pump laser frequencies are in the low-loss telecommunications band. We achieve 99.1%±4.9% downconversion and 98.0%±5.0% upconversion of photons by 12 nm using a weak coherent state with an average input of 0.27 photons per detection gate window.

PMID:
23503269
DOI:
10.1364/OL.38.000947

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