Multiplexer/demultiplexer with flattened spectral response

H - Electricity – 04 – J

Patent

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H04J 14/02 (2006.01) G02B 6/12 (2006.01) G02B 6/26 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2209069

A new multiplexer/demultiplexer includes a compound focusing mechanism having adjacent focal points. Multiple images of one or more input pathways for each different wavelength signal are projected onto one or more output pathways. The resulting spectral response is flattened in the vicinity of the center wavelength of each different wavelength signal. The number and spacing of the focal points, as well as the mode field radii of the input and output pathways, can be optimized for desired combinations of channel bandwidth, insertion loss, and crosstalk.

L'invention est un multiplexeur/démultiplexeur comportant un mécanisme de focalisation composé à foyers adjacents. Les images multiples d'un ou de plusieurs trajets d'entrée pour signaux à longueurs d'onde particulières sont projetées sur un ou plusieurs trajets de sortie. La courbe de réponse spectrale résultante est uniformisée au voisinage de la longueur d'onde centrale de chacun des signaux de longueurs d'onde différentes. Le nombre et l'espacement des foyers, ainsi que les rayons des trajets d'entrée et de sortie, peuvent être optimisés pour obtenir les combinaisons désirées de largeur de bande de canal, d'affaiblissement d'insertion et de diaphonie.

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