Rectangular response optical filter for partitioning a...

G - Physics – 02 – B

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G02B 5/26 (2006.01) G02B 6/34 (2006.01) H04B 10/12 (2006.01)

Patent

CA 2379080

The invention concerns a rectangular response optical filter for partitioning a limited spectral interval in a light flux with large spectrum comprising: a preferably monomode input optical fibre having one end; an array-reflector assembly in Litmann-Metcalf configuration; a converging optical system collimating at whose focus is set the input fibre end; a converging focusing optical system set between the array and the reflector; one or several output fibres of the same type as the input fibre. At least one reflector is placed in the focal plane of the focusing optical system and has a limited dimension in the dispersion plane, the position and the limited dimension of the dispersion plane determining the partitioned spectral interval.

L'invention concerne un filtre optique à réponse rectangulaire permettant le découpage d'un intervalle spectral limité dans un flux lumineux de spectre large comprenant: une fibre optique d'entrée de préférence monomode ayant une extrémité, un ensemble réseau-réflecteur dans la configuration de Littman-Metcalf, un système optique convergent de collimation au foyer duquel est placée l'extrémité de la fibre d'entrée, un système optique convergent de focalisation placé entre le réseau et le réflecteur, une ou plusieurs fibres de sortie de même type que la fibre d'entrée. Au moins un réflecteur est placé dans le plan focal du système optique de focalisation et a une dimension limitée dans le plan de dispersion, la position et la dimension limitée du réflecteur dans le plan de dispersion déterminant l'intervalle spectral découpé.

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