Improved diffraction grating for wavelength division...

G - Physics – 02 – B

Patent

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G02B 6/00 (2006.01) G02B 5/18 (2006.01) G02B 6/34 (2006.01) G02B 7/00 (2006.01)

Patent

CA 2411467

An improved diffraction grating for wavelength division multiplexing/demultiplexing devices is disclosed. The improved diffraction grating has a glass substrate, a polymer grating layer located adjacent to the glass substrate, and a metal coating layer located adjacent to the polymer grating layer. The improvement comprises a polymer coating layer located adjacent to the metal coating layer, and a glass cover located adjacent to the polymer coating layer, wherein the polymer coating layer and the glass cover compensate for thermal characteristics associated with the polymer grating layer and the glass substrate, respectively.

L'invention concerne un réseau de diffraction amélioré destiné à des dispositifs de multiplexage/démultiplexage en longueur d'onde. Ce réseau de diffraction amélioré comprend un substrat de verre, une couche de réseau polymérique située au voisinage de ce substrat de verre, ainsi qu'une couche de revêtement métallique située au voisinage de la couche de réseau polymérique. L'amélioration se caractérise par l'utilisation d'une couche de revêtement polymérique située au voisinage de la couche de revêtement métallique et par l'utilisation d'une garniture de verre située au voisinage de la couche de revêtement polymérique, la couche de revêtement polymérique et la garniture de verre compensant les caractéristiques thermiques associées respectivement à la couche de réseau polymérique et au substrat de verre.

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