Fabricating optical waveguide gratings

G - Physics – 02 – B

Patent

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Details

G02B 6/136 (2006.01) G02B 5/18 (2006.01) G02B 5/28 (2006.01) G02B 6/00 (2006.01) G02B 6/10 (2006.01) G02B 27/44 (2006.01) G02F 1/225 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2264879

A method of fabricating an optical waveguide grating having a plurality of grating lines of refractive index variation comprises the steps of: (i) repeatedly exposing a spatially periodic writing light pattern onto a photosensitive optical waveguide; and (ii) moving the writing light pattern and/or the waveguide between successive exposures of the writing light pattern, so that each of at least a majority of the grating lines is generated by at least two exposures to different respective regions of the writing light pattern.

La présente invention concerne un procédé permettant de fabriquer un réseau de diffraction à guides d'ondes optiques comprenant plusieurs lignes de réseau à variation d'indice de réfraction, et consistant: (i) à exposer à plusieurs reprises un guide d'ondes optiques photosensible à un motif de lumière d'écriture spatialement périodique; et (ii) à déplacer le motif de lumière d'écriture et/ou le guide d'ondes entre les expositions successives au motif de lumière d'écriture, de manière que chacune d'au moins une majorité de lignes du réseau est créée par au moins deux expositions à deux zones respectives différentes du motif de lumière d'écriture.

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