Alcatel

Alcatel Alsthom Compagnie Generale D'electricite

Other

Alcatel N.v.

Nexans

Draka Comteq B.v.

Avanex Corporation

Saft

Compagnie Generale D'electricite

Alcatel Converters

Societe Anonyme Dite Alcatel Alsthom Compagnie Generale D'electricite

Xavier Andrieu

Sophie Vanpoulle

Philippe Poignant

Fran&ccedil;ois Boudin

Ib I Olsen

Anne Decaumont

Stanislas Galaj

Denis Cottevieille

Alain Pastouret

Laurent Gasca

Laurence Kerreneur

Laurent Moreau

Fr&eacute;d&eacute;ric Cariou

Alain Rousseau

Isabelle Riant

Lionel Provost

Sylvie Barusseau

Joël Jacquet

Bernadette Pichon

Fabrice Poussiere

Bernard Boutevin

Sébastien Andre

Bernard Knosp

Dominique Morichere

Jean-François Libert

Francois Boudin

Sylvic Barusseau

Jean-Pierre Boeuve

Philippe Guillaume

Michel Rocher

Patrice Rabate

Be/ Atrice Rambla

Frédéric Cariou

Antoine Sonnet

Dalila Make

Laurence Josset

Fréderic Masson

Frederic Cariou

Jean-Marc Sage

Bernard Perrin

Jean-Pierre Flipo

V&eacute;ronique Danel

Christophe Jehoulet

Optical fiber having a multimode core () comprising:&#x2014;a first zone (), which is homogeneous, made of a first material, which has a first refractive index;&#x2014;a second zone () made of at least one second material, which has a second refractive index, which is less than the first index, that second zone () being peripherally arranged with respect to the first zone (), said first and second zones being configured so that the interface between those zones defines, in a transverse plane, a contour which has a star shape such that the multimode transmission characteristics of the fiber are equivalent to those of a graded-index fiber. Application in dual-core amplifying fibers or lasers or in transmission fibers for local networks.

Multimode optical fibre

A method of coating an optical fiber includes a step of coating the fiber with a curable coating composition and a step of curing the composition, which contains an unsaturated compound having a double bond and an oxidation catalyst. The curing step includes an in-line first phase consisting in exposing the coated fiber to UV radiation for a time shorter than the time needed for complete curing followed by an off-line second phase consisting in placing the coated fiber in an oxidizing medium in order to complete curing.

Method of coating an optical fiber

The present invention relates to an optical fiber (') having at least one Bragg grating (), the fiber comprising a core () surrounded successively by cladding () and a coating (), said fiber being obtained by writing said grating in the core and/or the cladding directly through the coating which is made of a material containing an organic substance that is substantially transparent to the ultraviolet type radiation used for writing said grating, wherein the material of said coating contains an inorganic substance that is not miscible with the organic substance and that is distributed in substantially uniform manner in said material.

Optical fiber having at least one bragg grating obtained by writing directly through the coating covering the cladding

The present invention concerns a method of manufacturing a graded index plastic optical fiber having an index that varies continuously between the center and the periphery of the fiber, from at least one polymer P and at least one reactive diluent D1 to allow the refractive index of said fiber to be varied. Said polymer P is a terpolymer comprising at least three repeating units P1, P2 and P3 with the following general formulae: 

Method for making a plastic graded index optical fiber and resulting graded index optical fiber

An optical fiber includes a primary covering layer, a secondary covering layer transparent to a laser beam, an intermediate covering layer less than 100 nm thick between the primary covering layer and the secondary covering layer and including a coloring element whose coloring properties can be modified by using the laser beam to irradiate the intermediate covering layer to write data.

Method of identifying optical fibers in a cable

The invention concerns a tunable filter comprising an optical fiber incorporating a Bragg grating on a portion of the fiber. Said fiber portion is coated with a material retained within a confined space and adapted to exert pressure on said Bragg grating to compress said portion of fiber radially and to stretch it longitudinally.

Tunable filter consisting of an optical fiber, and a corresponding method

The present invention relates to an optical device comprising an ionic conductor and a pair of electrodes, the ionic conductor being made of a material that is transparent to light and contains mobile ions and the electrodes being suitable for absorbing and desorbing the ions and being in ionic contact with the ionic conductor. The refractive index in at least a zone of the ionic conductor can be varied under the effect of the voltage applied between the electrodes. The electrodes contain an electrochemically active material selected from an active carbon, a conductive polymer, and an insertion material suitable for inserting ions in its structure.

Optical device of variable refractive index

A method of coating an optical fiber constituted by a doped silica core () and by silica cladding () consists in surrounding the doped silica core () and the silica cladding () in coating constituted by a first coating portion () of photocurable resin and a second coating portion () made by extruding a thermoplastic polymer.

Method of manufacturing an optical fiber having coatings of distinct kinds

An optical fiber comprises a silica multimode optical core having a refractive index nand at least one polymer optical cladding having a refractive index n, with n&#x3e;n. It further comprises a heterogeneous polymer intermediate optical cladding situated between the multimode core and the optical cladding and having a refractive index substantially equal to the refractive index nof the multimode core.

Silica optical fiber with a double polymer cladding

The present invention concerns an optical fiber cable including a hydrogen-absorbing composition comprising a catalyst and a hydrogen-absorbing component, characterized in that said hydrogen-absorbing component is a mixture of a non-absorbing polymer matrix and a hydrogen-absorbing organic compound including at least one carbon-carbon triple bond.

Optical fiber cable including a hydrogen-absorbing composition

In a thin conductor cable configured as a flat ribbon cable and surrounded by a common exterior sheath, the plurality of thin conductors are adhesively grouped together using an emulsion polymer.

Thin conductor ribbon

Method of production of a coating composition useful for covering glass fiber by means of a polymeric composition consisting of an aqueous suspension or emulsion of a polymer. The coating composition is deposited on the glass fiber and, next, the assembly is submitted to a curing process that is carried out at very high temperature and during a very short period of time.

Method of production of a coating composition

Coating for an optical fiber and method of manufacturing thereof, the coating comprising at least one partly crosslinked polymer having a level of crosslinking which increases according to a radial distance as one moves from the internal surface ( ) of the coating ( ) which interfaces with a cladding section ( ) to the external surface of the coating ( ). The coating comprises a single resin which is composed of a volatile, multifunctional and moderately reactive monomer dissolved in a fast curable oligomer, having a low modulus when polymerized.

Coating for optical fibers and method of manufacturing thereof

An organic electrolyte electric cell includes a first electrode having the superposition of a first layer containing an electrochemically active material and a porous second layer constituted by a polymeric material and having a free face. A second electrode is provided with a porous layer having at least one free face and containing an electrochemically active material, and the electrodes are assembled by adhesive bonding. The bonding is carried out by coating an adhesive onto the free face of the porous layer of one of the two electrodes and then bringing the free face coated with a film of adhesive into contact with the free face of the porous layer of the other electrode to form an electrochemical couple.

Organic electrolyte electric cell

Optical fiber and fibre-optic cable comprising at least one intermetallic element that absorbs hydrogen

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Bretigny sur Orge, France

Xavier Andrieu