Reduction of interferometric noise in an optical network

H - Electricity – 04 – B

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H04B 10/18 (2006.01) H04B 10/20 (2006.01)

Patent

CA 2163019

In an optical network through which data is transmitted as a stream of bits during successive bit periods by an optical source with a given centre frequency, to a receiver for detecting a frequency baseband, interferometric noise power, in particular incoherent beat noise power, is minimised by causing a variation in the centre frequency of the source such as to cause a redistribution of the incoherent beat noise power from the baseband to higher frequencies thereby reducing the noise in the baseband.

Dans un réseau optique à travers lequel des données sont transmisses par une source optique à un récepteur, sous forme d'une suite de bits au cours de périodes de bits successives et à une fréquence centrale donnée, afin de détecter une bande de base de fréquence, la puissance du bruit interférométrique, en particulier la puissance du bruit à battement non cohérent, est réduite au minimum par une variation de la fréquence centrale de la source afin d'entraîner une redistribution de la puissance du bruit à battement non cohérent de la bande de base vers des fréquences plus élevées, ce qui permet de réduire le bruit dans la bande de base.

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