Université De Limoges

Draka Comteq B.v.

Cnrs

Glophotonics

Meggitt Ltd.

Frederic Gerome

Fetah Benabid

Jean-Marc Blondy

Benoit Debord

Pierre Sansonetti

Laurent Gasca

Lionel Provost

Christine Moreau

Philippe Leprince

Jean-Louis Auguste

Sébastien Fevrier

Georges Humbert

Raphael Emmanuel Jamier

Gael Gaborel

Benoit Beaudou

A waveguide with a hollow core () delimited by a closed contour includes a succession of arcs () of negative curvature, each arc including a chord (), characterized in that the contour of the hollow core () includes small arcs (PA) and large arcs (GA) arranged alternately, each arc () being symmetric with respect to a straight line passing through the center () of the hollow core () and the middle of the chord () thereof, the ratio b=2Ra/C of the large arcs being greater than 0.9 for the large arcs (GA), Ra corresponding to the maximum distance between the chord () and the arc (), C corresponding to the length of the chord ().

Hollow core waveguide with optimized contour

A device for the excitation of a gas medium () contained in a casing (), the device being coupled to the casing () and disposed outside same and including an applicator that can generate lateral excitation inside the casing () over at least a portion thereof. The device is characterized in that the casing () is a hollow-core photonic dielectric structure (), in which the core has a diameter smaller than 300 &#x3bc;m, and in that the applicator is of the microwave type and can be used to generate a surface wave that can create and confine a microplasma from the gaseous medium contained in the casing ().

Device for the excitation of a gas column enclosed in a hollow-core optical fibre

An optical module for chromatic dispersion compensation comprises an optical fiber wound so as to present a variable radius of curvature. The fiber has an index profile such that it has, for the main propagation mode, a negative dispersion value having a minimum at a given wavelength in a given spectral band. The value and the spectral position of the dispersion minimum vary with the radius of curvature of the fiber. The module allows the introduction of a large chromatic dispersion compensation value overall of a given spectral band, as well as compensation corrections for specific wavelengths inside the given spectral band.

Chromatic dispersion compensation module

Growing community of inventors

Limoges, France

Frederic Gerome