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European Conference on Optical Communication

High-brightness source of heralded single photons for quantum communications from microstructured fibre

Olivier Alibart

Published Jan 1, 2005• 4 citations
Publisher

Abstract

We discuss a novel micro-structured fiber source of photon pairs and heralded single photons suitable for quantum communications. This bright source emits up to ~3.2.105 /sec of narrow-band heralded single photons. (2 pages)
DOI
10.1049/cp:20050836

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We demonstrate a source of photon pairs with widely separated wavelengths, 810 and 1548 nm, generated through spontaneous four-wave mixing in a microstructured fiber. The second-order autocorrelation function g((2))(0) was measured to confirm the nonclassical nature of a heralded single-photon source constructed from the fiber. The microstructured fiber presented herein has the interesting property of generating photon pairs with wavelengths suitable for a quantum repeater able to link free-space channels with fiber channels, as well as for a high-quality telecommunication wavelength heralded single photon source. It also has the advantage of potentially low-loss coupling into standard optical fiber. These reasons make this photon pair source particularly interesting for long-distance quantum communication.
We present an experimental characterization of a heralded single-photon source based on spontaneous four-wave mixing in a single-mode microstructure fiber. We measure the second-order correlation function g(2)(0){g}^{(2)}(0)g(2)(0) to be far below the classical, Poissonian limit of 1 over a broad spectral range. With single-spatial-mode output, such a spectrally bright and broad fiber-based heralded single-photon source is suitable for a variety of quantum-information applications.