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Génération de paires de photons corrélés par mélange à quatre ondes spontané dans des fibres microstructurées à coeur liquide

Margaux Barbier 1 
1 Laboratoire Charles Fabry / Manolia
LCF - Laboratoire Charles Fabry
Abstract : Quantum telecommunication technologies rely on correlated photon pair sources, which are often based on the third-order nonlinear process of spontaneous four-wave mixing in silica-core photonic crystal fibres. A fibred architecture is advantageous because it minimizes the coupling losses between the optical source and the other components of quantum communication networks. Moreover, using a photonic crystal fibre rather than a conventional silica fibre offers the possibility of improving the photon generation (thanks to a small effective core area) and extending the wavelength coverage (thanks to dispersion management through the microstructuration design). However, the performances of silica-core photonic crystal fibre sources are limited in terms of quantum purity, because of the ubiquitous spontaneous Raman scattering process, which is a source of uncorrelated broadband noise photons in silica. We propose an original solution to this Raman problem by replacing the silica core by a liquid core, thanks to a hollow-core photonic crystal fibre filled with a nonlinear liquid. We actually performed the first experimental demonstration of the generation of correlated photon pairs in a liquid-core fibre, and demonstrated that, thanks to the specific Raman properties of liquids (which usually exhibit thin-line Raman spectra), it is possible to reduce the Raman noise level by several orders of magnitude. This work opens the way for the development of high quantum quality correlated photon pair fibred sources.
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Submitted on : Tuesday, November 18, 2014 - 4:59:05 PM
Last modification on : Saturday, June 25, 2022 - 11:12:50 AM
Long-term archiving on: : Thursday, February 19, 2015 - 12:10:28 PM


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  • HAL Id : tel-01084201, version 1



Margaux Barbier. Génération de paires de photons corrélés par mélange à quatre ondes spontané dans des fibres microstructurées à coeur liquide. Autre [cond-mat.other]. Institut d’Optique Graduate School, 2014. Français. ⟨NNT : 2014IOTA0011⟩. ⟨tel-01084201⟩



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