Optical waveguide devices and methods of fabricating the same

G - Physics – 02 – B

Patent

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Details

G02B 6/10 (2006.01) G02B 6/122 (2006.01) G02B 6/132 (2006.01) G02B 6/36 (2006.01) G02B 6/30 (2006.01)

Patent

CA 2346593

The present invention concerns an optical waveguide device having a structure for effectively suppressing variation in optical characteristics due to temperature change without causing increase in device size, and a fabrication method thereof. The optical waveguide device has a structure in which a first main member having a positive coefficient of linear expansion is fixed to a sub member having a negative coefficient of linear expansion. The first main member is provided with an undercladding, a core functioning as an optical waveguide provided on a plane of the undercladding, and an overcladding provided so as to cover the core between the undercladding and the overcladding. The first main member is made, for example, of a silica glass or silicon based material and the core is doped with a dopant for increasing the refractive index. While covering the whole of at least one major surface of the first main member, the sub member is fixed to the major surface.

La présente invention concerne un dispositif à guide d'ondes optiques ayant une structure pour supprimer efficacement toute variation dans les caractéristiques optiques à la sutie de changement de température, sans toutefois causer une croissance de la taille du dispositif, ainsi qu'une méthode de fabrication desdits dispositifs. Le dispositif à guide d'ondes optiques comporte une structure dans laquelle une première pièce principale à coefficient positif d'expansion linéaire est fixéeà une pièce secondaire à coefficient négatif d'expansion linéaire. La première pièce principale est pourvue d'un sous-gainage, d'un noyau servant de guide d'ondes optiues sur un plan du sous- gainage et d'un sur-gainage qui couvre le noyau entre le sous-gainage et le sur-gainage. La première pièce principale est fabriquée, par exemple, à partir de verre de silice ou de matériau à base de silicium, alors que le noyau est dopé avec un dopant pour accroître l'indice de réfraction. La pièce secondaire couvre l'ensemble d'au moins une surface majeure de la première pièce principale à laquelle elle est fixée.

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