Add/drop multiplexer

H - Electricity – 04 – J

Patent

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Details

H04J 14/02 (2006.01)

Patent

CA 2224494

A number of add/drop multiplexers comprising passive optical components for wavelength division multiplexing are described. These add/drop multiplexers are particularly adapted for use in branching units (10) of such networks to allow signals passing along fibres (1, 2, 11, 12) of a main trunck between terminal stations (20, 30) to be dropped to and added from a spur station (40), the design of the add/drop multiplexers allowing a reduced number of spur fibres (3, 13) to be used as signals are routed between trunk fibres (1, 2, 11, 12) at spur fibres (3, 13) according to carrier wavelength.

L'invention se rapporte à un certain nombre de multiplexeurs à insertion-extraction comprenant des composants optiques passifs pour multiplexage par répartition en longueur d'onde. Ces multiplexeurs à insertion-extraction sont particulièrement adaptés pour être utilisés dans des unités de branchement (10) de réseaux de ce type afin que les signaux passant dans les fibres (1, 2, 11, 12) de la ligne principale, entre les stations terminales (20, 30), soient prélevés pour être acheminés vers une station de dérivation (40), puis insérés à partir de cette dernière. Grâce à la conception des multiplexeurs à insertion-extraction, seul un nombre réduit de fibres de dérivation (3, 13) est utilisé, les signaux étant acheminés entre les fibres de la ligne principale (1, 2, 11, 12) vers les fibres de dérivation (3, 13) en fonction de la longueur d'onde porteuse.

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