Alcatel

Nexans

Magnus Gunnarsson

Peter Elisson

Jean-Pierre Bonicel

Olivier Tatat

Houching Michael Yang

Olivier Pinto

Jérôme Fournier

Mats Lanned

Victor Emanuelsson

Ulrika Hallden

The present invention relates to a method of manufacturing an optical fiber ribbon comprising the following steps: arranging N groups of optical fibers so that the fibers in any one group are disposed in the same plane, applying a first layer of a first liquid resin settable under the action of UV type radiation onto each group of optical fibers to form first casings, applying a second layer of a second liquid resin settable under the action of UV type radiation disposed to link together the adjacent first casings, and applying a single irradiation step to the second layer and the first layers using UV type radiation in order to form the first matrices and to form the 'link' second matrix.

Method of manufacturing an optical fiber ribbon, and an optical ribbon

An optical fiber multi-ribbon and method for making the same is disclosed. The optical fiber multi-ribbon comprises N, where N is an integer greater than one, optical fiber ribbon members arranged in a common plane. Each of the N optical fiber ribbon members further comprise a plurality of optical fibers arranged in a planar array and an ultraviolet light curable primary matrix ribbonizing layer enveloping the plurality of optical fibers. The material forming the primary matrix ribbonizing layer of at least one of the N optical fiber ribbon members has a surface cure of at least about 80 percent. An ultraviolet light curable secondary matrix ribbonizing layer envelopes the primary matrix ribbonizing layers of the N optical fiber ribbon members. The secondary matrix ribbonizing layer material has a percent elongation to break greater than about 20 percent. The combination of the 80 percent surface cure of the primary matrix ribbonizing layers and the percent elongation to break greater than 20 percent of the secondary matrix ribbonizing layer provide an optical fiber multi-ribbon that has good handleability in terms of peeling of the secondary matrix ribbonizing layer from the primary matrix ribbonizing layer and good separation between the N optical fiber ribbons.

Optical fiber multi-ribbon and method for making the same

An optical unit (5a, 5b) comprising a plurality of optical fibers (2) grouped together in a tube (3a, 3b) and optionally assembled into one or more ribbons inside tube. The tube (3a, 3b) has a Young's modulus less than 200 MPa and a Shore A hardness less than 90 at a temperature of approximately +20.degree. C. and a Young's modulus less than 2000 MPa at a temperature of approximately -40.degree. C. A fiber optic cable (10, 20) comprising at least one such optical unit (5a, 5b). Application of the cable to telecommunications.

Optical unit for fiber optic cables

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Grimsas, Sweden

Magnus Gunnarsson