Method of fast gain control in wdm optical networks

H - Electricity – 04 – J

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H04J 14/02 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2196364

In a WDM network employing a plurality of optical amplifiers in at least one optical fiber link, a system and method for dynamically controlling gain in accordance with the collective behavior of the amplifier chain. According to the present invention, the required response time of dynamic gain control is selected substantially inversely relative to the number of amplifiers in the communication path. Illustratively, in a large-scale optical network (with signal channel paths traversing say, a hundred optical amplifiers), the response time of gain control in accordance with the present invention may be on the order of 5 µs or even less.

ystème et méthode de régulation dynamique de gain en fonction du comportement collectif d'une chaîne d'amplificateurs optiques dans un réseau à multiplexage par répartition en longueur d'onde (WDM) employant un certain nombre d'amplificateurs optiques. Conformément à la présente invention, le temps de réponse nécessaire pour la régulation dynamique de gain est choisi essentiellement en fonction inverse du nombre d'amplificateurs de la voie de communication. Par exemple, dans un réseau optique à grande échelle (les voies de signaux passant par, mettons, une centaine d'amplificateurs optiques), le temps de réponse nécessaire pour la régulation de gain conformément à la présente invention peut être de l'ordre de 5µs ou même moins.

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