Optical tube assembly having a dry insert

G - Physics – 02 – B

Patent

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Details

G02B 6/44 (2006.01)

Patent

CA 2569748

An optical tube assembly having at least one optical waveguide, at least one dry insert (14), and a tube. In one embodiment, the dry insert has a first layer and a second layer attached together with an adhesive. The dry insert also includes a plurality of particles having an average particle size of about 600 microns or less for inhibiting microbending. The first layer may be a polyurethane foam having an average cell size of about 1000 microns or less and the second layer is a water-swellable layer. The dry insert is disposed within the tube and generally surrounds the at least one optical waveguide and the tube asembly can be a portion of a fiber optic cable.

L'invention concerne un ensemble tube optique comprenant au moins un guide d'ondes optiques, au moins un élément d'insertion sec (14) et un tube. Dans un mode de réalisation, l'élément d'insertion sec comporte une première couche et une seconde couche liées entre elles au moyen d'un adhésif. L'élément d'insertion sec comprend également une pluralité de particules dont la dimension granulométrique moyenne est d'environ 600 microns ou moins afin d'inhiber la microcourbure. La première couche peut être une mousse polyuréthane dont la dimension granulométrique moyenne est d'environ 1000 microns ou moins et la seconde couche est une couche qui gonfle dans l'eau. L'élément d'insertion sec est disposé dans le tube et entoure sensiblement le ou les guides d'ondes optiques et l'ensemble tube peut être une partie d'un câble à fibres optiques.

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