Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Université Des Sciences Et Technologies De Lille

Université Lille 1 - Sciences Et Technologies

Geraud Pierre Bouwmans

Arnaud Mussot

Laurent Bigot

Yves Quiquempois

Gilles Melin

Emmanuel Hugonnot

Alexandre Kudlinski

Marc Douay

Constance Valentin

Mathias Perrin

Aurelie Betourne

Karen Delplace

Antoine Le Rouge

A device for converting transverse spatial profile of intensity of a light beam, using a microstructured optical fiber. Transverse dimensions of the fiber vary longitudinally and both its ends have opto-geometrical parameters such that at the wavelength of the beam the fiber has a fundamental mode having two different profile shapes at its two ends. Thus by introducing the beam with one of the profiles through one of the two ends, the beam emerges through the other end with the other profile, whose shape is different from that of the profile of the introduced beam.

Device for converting the transverse spatial profile of intensity of a light beam, preferably using a microstructured optical fibre

A system for generating polychromatic light, which includes: an optical pumping device suitable for continuously or quasi-continuously emitting a monochromatic or quasi-monochromatic radiation according to a pumping wavelength; a device for guiding light arranged such as to emit polychromatic radiation continuously or quasi continuously, at the output thereof, and a device for coupling between the pumping and coupling device. In the system, the guiding device, includes a microstructured optical fiber in which the core is at least partially doped with a material having a high intrinsic non-linear response, and the geometry of the optical fiber and the doping rate of the core thereof are predetermined such as to adapt the zero dispersion length of the optical fiber to the pumping wavelength.

System for continuously generating polychromatic light by means of doped microstructured optical fibre

The microstructured optical fibre comprises a core () surrounded by a sheath () comprising a base material having a refraction index (ni) and a plurality of at least two different types of inclusion: a first type of inclusion () having a refraction index n2 (n2&#x3e;n1), and a second type of inclusion () having a refraction index n3 (n3&#x3c;n1). The inclusions () are arranged and dimensioned in such a way as to ensure guidance, by total internal reflection (RTI), of a fundamental mode of the light, centred on a wavelength &#x3bb;, and of a fundamental mode of the light in the first photonic forbidden band (BG), centred on a wavelength &#x3bb;, which is different to that &#x3bb;of the fundamental mode guided by total internal reflection (RTI).

Hybrid microstructured optical fibre for guidance by means of photonic forbidden bands and by total internal reflection optimised for non-linear applications

Growing community of inventors

Lille, France

Geraud Pierre Bouwmans