Mems device having multiple dwdm filters

G - Physics – 02 – B

Patent

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Details

G02B 6/34 (2006.01) G02B 6/35 (2006.01)

Patent

CA 2412194

An optical signal processing method and a device which can serve as a signal multiplexer or demultiplexer (2) can be tuned in discrete increments. This device has a movable filter assembly (47, 47', 47'', 47''') having a number of filters, with each filter having a surface which reflects a particular wavelength of light and passes other wavelengths of light. This defines two wavelength-dependent signal paths. Light reflecting from a reflective surface of the filter passes along one signal path which includes an input waveguide (11) and a first output waveguide (13). Light transmitted through the filter travels along another signal path which includes the input waveguide and a second output waveguide. The filter can be contained in a trench separating (17) the input and second output waveguides, and can be moved in the trench (17) to alter the optical properties of the two signal paths.

L'invention concerne un procédé de traitement de signal optique, et un dispositif pouvant servir de multiplexeur ou démultiplexeur (2) de signal dans des incréments discrets. Ce dispositif comprend un ensemble de filtres mobiles (47, 47', 47'', 47''') doté d'un certain nombre de filtres, chaque filtre possédant une surface qui réfléchit une longueur d'onde particulière de lumière, et laisse passer d'autres longueurs d'onde de lumière, ce qui définit deux chemins de signaux dépendant des longueurs d'onde. La lumière réfléchie à partir d'une surface réfléchissante du filtre suit un chemin de signal qui comprend un guide d'onde d'entrée (11) et un premier guide d'onde de sortie (13). La lumière transmise par l'intermédiaire du filtre suit l'autre chemin de signal qui comprend le guide d'onde d'entrée et un second guide d'onde de sortie. Le filtre peut être contenu dans une tranchée séparant (17) le guide d'onde d'entrée et le second guide d'onde de sortie, et peut se déplacer dans ladite tranchée (17) de façon à altérer les propriétés optiques des deux chemins de signaux.

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