Abstract:
A method of coating an optical fiber constituted by a doped silica core (1) and by silica cladding (2) consists in surrounding the doped silica core (1) and the silica cladding (2) in coating constituted by a first coating portion (3) of photocurable resin and a second coating portion (4) made by extruding a thermoplastic polymer.
Abstract:
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.
Abstract:
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.
Abstract:
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 (3) of the coating (4) which interfaces with a cladding section (2) to the external surface of the coating (4). 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.
Abstract:
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.
Abstract:
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.
Abstract:
The filamentary elements are of a diameter that is less than or equal to 1 millimeter. The support comprises longitudinal channels each intended to house a respective filamentary element, each channel being defined by two longitudinal walls interconnected by a web and defining a longitudinal channel opening, the width of said longitudinal opening being variable by elastically deforming the longitudinal walls between an access configuration giving access to the channel enabling a filamentary element to pass through said opening and a retaining configuration for retaining a filamentary element in the channel. The filamentary elements are selected from optical fibers and electrical coaxial cables.
Abstract:
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.
Abstract:
An optical fiber comprises a silica multimode optical core having a refractive index n1 and at least one polymer optical cladding having a refractive index n2, with n1>n2. 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 n1 of the multimode core.
Abstract:
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.