France Telecom Sa

France Telecom

L'etat Francais Represente Par Le Ministre Des Postes, Des

Yves Ruello

Annie Morgand

Jean-Pierre Louboutin

Jean-Louis Desaunay

Regis Petit

Benoit Cadier

Gerard Ayoul

A method for the deposition of a coating layer on an optical fiber while it is being drawn. The coating layer is designed to reduce the permeability of the optical fiber to water vapor and therefore to increase its lifetime. The method is characterized in that it consists in carrying out a decomposition of a gas mixture of boron halogenide and hydrogen and/or boron halogenide and ammonia gas by a microwave plasma-assisted addition of energy and in that the operation is conducted in the presence of a carrier gas in order firstly to carry the gas mixture to a reaction medium and secondly to activate the plasma.

Method for depositing a coating layer on an optical fiber while it is being drawn and device for its implementation

The invention concerns a method and a device for depositing at least one thin film of a liquid agent on a wireframe element such as an optical fiber designed to form a very fine coating on said wireframe element consisting in spraying the liquid agent on the wireframe element with spraying means, the wireframe element and the spraying means being in relative movement with respect to each other. Preferably, the liquid agent used is obtained from novel acrylphosphorus or metacrylphosphorus compounds. The method is most particularly adapted for coating optical fibers and enables to substantially improve the stress corrosion factor &ldquo;n&rdquo; of the fibers and to maintain said factor &ldquo;n&rdquo; after aging.

Method and device for coating a wireframe element with a fine liquid deposit and coated optical fiber

A modular optical transmission cable which has several reinforcement and optical modules, each optical module having:

Structures of optical fiber cables self-reinforced against compression

Joint closure modules and boxes for optical fiber cables, also known as splice organizers, the module having a supporting plate demarcating a shielded space of extension of the fiber transfer sections, said supporting plate including, firstly, a set of aligned and separate means for anchoring the external sheath, the peripheral reinforcements and the central strength element, respectively, of each cable and, secondly, at least one fiber coiling and connection cartridge with guided hinging, arranged so as to limit the transfer length and the course of shift of said sections for the transfer of the guided shift of said hinged cartridge.

Growing community of inventors

Lannion, France

Yves Ruello