Water-blocked optical cable and process for the production...

Details Water-blocked optical cable and process for the production... Water-blocked optical cable and process for the production...

G - Physics

02

B

G02B 6/44 (2006.01)

Patent

CA 2586930

An optical cable (100) for communication comprising at least one retaining element (2) blocked with respect to the water propagation as well as a process for manufacturing such an optical cable (100) are described. The optical cable (100) comprises, in addition to the retaining element (2), at least two transmission elements (3) housed within the retaining element (2), and a water swellable yarn (4) housed within the retaining element (2). The water swellable yarn (4) is selected according to the following equation: (I) in which VW is the volume of the water swellable yarn (4) after swelling upon contact with water; Vis the total free volume in the retaining element (2); k is a constant >= 180 R is a constant >= 1.4; and Vt is the free volume per each transmission element (3). Advantageously, the optical cable (100) is water-blocked and the water swellable yarn (4) does not induce microbending effects on the transmission elements (3).

L'invention concerne un câble optique (100) destiné à la communication comprenant au moins un élément de retenue (2) imperméable à la propagation de l'eau ainsi qu'un procédé de fabrication dudit câble optique (100). Le câble optique (100) comprend, en plus de l'élément de retenue (2), au moins deux éléments de transmission (3) logés dans l'élément de retenue (2), ainsi qu'un fil gonflable dans l'eau (4) logé dans l'élément de retenue (2). Le fil gonflable dans l'eau (4) est sélectionné en fonction de l'équation (I) suivante, dans laquelle VW représente le volume du fil gonflable dans l'eau (4) après gonflement lors du contact avec l'eau ; V représente le volume libre total dans l'élément de retenue (2) ; k représente une constante = 180, R représente une constante = 1,4 ; et Vt représente le volume libre pour chaque élément de transmission (3). De manière avantageuse, le câble optique (100) est imperméable à l'eau et le fil gonflable dans l'eau (4) n'induit pas d'effets de microcourbure sur les éléments de transmission (3).

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