Dispersion compensating element having an adjustable dispersion

H - Electricity – 04 – B

Patent

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H04B 10/18 (2006.01)

Patent

CA 2342212

In accordance with the present invention, a dispersion compensation module is coupled to a transmission optical fiber. The dispersion compensation module includes segments of optical fiber of varying length, some of which have a positive dispersion while other have a negative dispersion. Selected optical fiber segments are coupled to one another to provide a desired net dispersion to offset the dispersion associated with the transmission optical fiber. Thus, rather than provide a unique segment of DCF for each span, the same dispersion compensation module can be used for spans of varying length and fiber types by simply connecting appropriate segments of fiber within the module.

Selon l'invention, un module de compensation de dispersion est couplé à une fibre optique d'émission. Ce module de compensation de dispersion comporte des segments de fibre optique présentant différentes longueurs, dont certains présentent une dispersion positive tandis que d'autre présentent une dispersion négative. Des segments choisis de fibre optique sont couplés les uns aux autres de façon à produire une dispersion nette voulue et à décaler la dispersion associée à la fibre optique d'émission. De cette façon, au lieu d'utiliser un seul segment de fibre à dispersion compensée pour chaque intervalle, on peut utiliser le même module de compensation de dispersion pour des intervalles présentant différentes longueurs et différents types de fibres, en connectant simplement les segments appropriés de fibres dans le module.

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