Combination optical fiber cable

Details Combination optical fiber cable Combination optical fiber cable

G - Physics

02

B

G02B 6/44 (2006.01) G02B 6/02 (2006.01)

Patent

CA 2242707

An optical fiber cable comprises a central tube containing at least one optical fiber, a plurality of outer tubes, each containing at least one optical fiber, and at least two strength members, wherein the outer tubes and strength members are disposed around and in contact with the central tube, the strength members being between intermediate pairs of outer tubes. Preferably, a cord is wound around the outer tubes and strength members to hold them against the outer tube. Preferably, the optical fiber in the central tube is part of an optical fiber ribbon. Preferably, a plurality of individual optical fibers are provided in the outer tubes. The optical fibers are loosely contained within the central and outer tubes. One or several additional tubes containing insulated copper pairs or a coaxial cable may also be provided. Preferably, the cable tubes and the strength members are disposed in a reverse oscillating lay or S-Z fashion around the central tube.

Cette invention concerne un câble à fibres optiques comprenant un tube central renfermant au moins une fibre optique, une série de tubes extérieurs renfermant chacun au moins une fibre optique et au moins deux brins de renfort, les tubes extérieurs et les brins de renfort étant torsadés autour du tube central et les brins de renfort étant interposés entre paires de tubes extérieurs. De préférence, un fil est enroulé autour des tubes extérieurs et brins de renfort pour les maintenir contre le tube central. De préférence également, la fibre optique du tube central fait partie d'un ruban à fibres optiques. De préférence, les tubes extérieurs renferment chacun plusieurs fibres optiques séparées. Les fibres optiques ne sont entourées d'aucun matériau de calage dans le tube central et les tubes extérieurs. Le câble peut comporter un ou plusieurs tubes addtionnels renfermeant des paires de conducteurs en cuivre isolées ou un câble coaxial. De préférence, les tubes et les brins de renfort forment un câblage SZ.

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