Network for distributing signals to a plurality of user...

G - Physics – 02 – B

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G02B 6/02 (2006.01) G02B 6/255 (2006.01) H04B 10/207 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2422088

A network (100) for distributing signals to a plurality of user equipment (42) comprises a distribution unit (40), and a plurality of optical cables (1) adapted to make said distribution unit (40) communicate with said plurality of user equipment (42). In turn, each optical cable (1) comprises an optical fibre (10) having a core (14), a cladding (12) and a predetermined simple refractive index profile .DELTA.n(r). Each optical fibre (10) is adapted to guarantee a single-mode propagation at higher wavelengths than about 1260 nm and a few-mode propagation at about 850 nm, and each optical fibre has such refractive index profile .DELTA.n(r) as to guarantee macro-bending losses at 1550 nm that are less than about 0.5 dB and an intermodal delay .DELTA..tau. at 850 nm that is less than or equal to, about 1 ns/Km.

L'invention concerne un réseau (100) permettant la distribution de signaux vers une pluralité d'équipements (42) d'utilisateurs. Ce réseau comprend une unité (40) de distribution et une pluralité de câbles (1) optiques permettant de connecter cette unité (40) de distribution avec la pluralité d'équipements (42) d'utilisateurs. Chaque câble (1) optique comprend une fibre (10) optique comprenant un coeur (14), une gaine (12) et un profil n(r) prédéterminé d'indice de réfraction simple. Chaque fibre (10) optique est conçue pour assurer une propagation monomode avec des longueurs d'ondes supérieures à 1260 nm environ, et une propagation multimode avec une longueur d'onde de 850 nm environ, et chaque fibre optique présente un profil n(r) d'indice de réfraction permettant d'assurer des pertes de macrocourbure inférieures à 0,5 dB à 1550 nm et un retard intermodal inférieur ou égal à 1ns/km à 850 nm.

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