Optical fiber cable with support member for indoor and...

G - Physics – 02 – B

Patent

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G02B 6/44 (2006.01) G02B 6/46 (2006.01)

Patent

CA 2359753

An optical fiber cable has a jacket of flame retardant and ultraviolet stabilized plastic and meets the requirements for both outdoor and indoor use. The jacket has two longitudinal portions interconnected by an intermediate longitudinal portion of a thickness less than the thickness of the two portions. One of the two portions contains a longitudinally extending strength member of sufficient tensile strength to support the cable when the cable is suspended outdoors between relatively widely spaced supports. The other of the two portions has a longitudinally extending bore which contains at least one tightly buffered, longitudinally extending optical fiber and can also contain a flexible, longitudinally extending strength member. When the cable is suspended outdoors between support, the intermediate jacket portion has sufficient strength to prevent separation of the strength member portion from the optical fiber portion. The strength member portion, when desired, can be separated from the optical fiber portion to form an optical fiber subunit, which is flexible and meets indoor riser requirements, and a strength member subunit.

Câble à fibre optique muni d'une gaine en plastique ignifuge et stabilisé contre les ultraviolets et qui satisfait aux exigences relatives à une utilisation tant à l'intérieur qu'à l'extérieur. La gaine comporte deux parties longitudinales reliées par une partie longitudinale intermédiaire d'une épaisseur inférieure à celle des deux premières parties. Une des deux parties contient une membrure de force s'étendant longitudinalement, d'une résistance à la rupture suffisante pour supporter le câble lorsque ce dernier est suspendu à l'extérieur entre des supports d'un espacement relativement large. L'autre des deux parties comporte un alésage s'étendant longitudinalement qui contient au moins une fibre optique tamponnée serré s'étendant longitudinalement; l'alésage peut aussi contenir une membrure de force longitudinale souple. Lorsque le câble est suspendu à l'extérieur entre des supports, la partie intermédiaire de la gaine a une résistance suffisante pour empêcher la séparation d'une membrure de force de la fibre optique. La membrure de force, si désiré, peut être séparée de la fibre optique pour former une sous-unité de fibre optique qui est souple et est conforme aux exigences relatives aux tubes montants intérieurs, ainsi qu'un sous-élément de membrure de force.

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