Optical add drop and dispersion compensation apparatus

H - Electricity – 04 – B

Patent

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Details

H04B 10/18 (2006.01) H04B 10/213 (2006.01)

Patent

CA 2419852

The present invention comprises a method and apparatus for dispersion compensation of WDM signals carried in transmission lines of a WDM system. Herein, selection and placement of dispersion compensation modules and add drop modules are selected according to the level of dispersion of signals carried in particular channels. The channels are separated using an optical add drop multiplexer so that the designer knows in advance which and how many modules to place on which branch waveguides. By this application, the output of each branch waveguide is made to be substantially similar. Likewise, by this design, a greater number of customers can be interconnected because of the advantageous use of add drop modules which do not require the intermediate step of converting optical signals into electrical signals during the add drop process.

L'invention concerne un procédé et un dispositif permettant de compenser la dispersion de signaux de multiplexage par répartition en longueur d'ondes transmis dans des lignes de transmission d'un système de multiplexage par répartition en longueur d'ondes. Selon l'invention, la sélection et le placement de modules de compensation de dispersion et de modules d'insertion-extraction s'effectuent selon le niveau de dispersion de signaux transmis dans des canaux particuliers. Ces canaux sont séparés à l'aide d'un multiplexeur d'insertion-extraction optique, de sorte que le concepteur connaisse à l'avance quel module placer et combien, sur quels guides d'ondes ramifiés. Dans cette application, la sortie de chaque guide d'ondes ramifié est réalisée de manière à être sensiblement similaire. De même, ce concept permet à un plus grand nombre de clients d'être interconnectés en raison de l'utilisation avantageuse des modules d'insertion-extraction qui ne nécessitent pas d'étape intermédiaire de conversion de signaux optiques en signaux électriques pendant le processus d'insertion-extraction.

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