Université De Limoges

Centre National De La Recherche Scientifique

Horiba Abx Sas

Université´de Rouen

Leukos

Silitec Fibers Sa

Multitel Inc.

Philippe Roy

Vincent Couderc

Philippe Leproux

Sébastien Fevrier

Kay Schuster

Philippe Nerin

Carlos Pedrido

Stephan Grimm

Raphael Emmanuel Jamier

Ammar Hideur

Pierre-Alain Champert

Frédéric Sandoz

Philippe Ribaux

Caroline Lecaplain

Philippe Hamel

Peter Othenin

Methiew Devautour

Yves Hernandez

Ludovic Grossard

Anthony Bertrand

Marco Andreana

Romain Dauliat

Stephane Hilaire

A monomode optical fiber, and a process for manufacturing such a fiber, that comprises a monomode core and at least one cladding encircling the core. The monomode core comprises at least two zones, a first zone with at least one first refractive index and a second zone with at least one second refractive index different from the first refractive index. The difference between the first refractive index and the second refractive index is of the same order of magnitude as the variation in the refractive index of the second zone between the inactive state and the active state of the fiber.

Monomode optical fiber designed to compensate for a refractive index variation related to thermal effects and laser using such an optical fiber as a gain medium

The invention relates to a laser oscillator comprising an amplifying optical fiber (MA) inserted in a resonant cavity so as to act as an active medium, and pumping means (DL, CP) causing a population inversion in said amplifying optical fiber, characterized in that said amplifying optical fiber comprises at least two cores (C1, C2) optically coupled to each other in a common cladding (G), and in that the shapes, sizes, refractive indices and the relative arrangement of said cores are chosen so that super-modes are supported, at least one (SMI) of which super-modes has, in an emission spectral band of said laser oscillator, a normal chromatic dispersion.

Fiber-optic laser oscillator

A supercontinuum source capable of emitting waves between the infrared range and the ultraviolet range, includes a pulsed laser source () capable of generating a laser beam and a non-linear microstructured optical fiber () capable of receiving the laser beam, in such a way that the supercontinuum source is capable of generating a beam (F') over a pulse duration (T&#x2032;), characterized in that the supercontinuum source includes elements for varying the pulse duration.

Pulsed supercontinuum source of variable pulse duration

According to the invention, the intermediate sheath () is formed by assembling longitudinal elements (A) and includes: a first optical material, the refractive index of which differs from the refractive index of the monomode core by at most 10; and a second optical material, the refractive index of which is lower than the refractive index of said monomode core and differs therefrom by at least 10.

Triple-sheathed monomode optical fiber

The present invention relates to a method and an apparatus for fabricating a preform () that can be used for drawing an active optical fiber (). The present invention further relates to an active optical fiber (), designed for amplification or attenuation purposes, drawn from said preform () and to an optical amplifier () using a laser active optical fiber.

Method for fabricating an optical fiber preform

A dedicated polychromatic light generating device including optical pumping devices used to deliver radiation with at least two different excitation wavelengths and a light-guiding device used to deliver polychromatic light at an output when excited by the radiation in a non-linear interaction regime.

Device for generating polychromatic light with a continuous spectrum

Growing community of inventors

Limoges, France

Philippe Roy