| 摘要 |
<p>An optical waveguide device comprising an optical waveguide substrate, a supporting body for supporting said optical waveguide substrate and an adhesive layer for adhering said optical waveguide substrate and said supporting body is disclosed. Further, said optical waveguide substrate comprising a plate-shaped main body which comprises an electro-optic material, first and second main faces opposing each other and a thickness of 30 µm or smaller, an optical waveguide provided on said main body and an electrode provided on said main body, wherein said adhesive layer adheres said supporting body and said second main face of said main body, wherein the minimum value of the thermal expansion coefficient of said supporting body is 1/5 or larger of the minimum value of the thermal expansion coefficient of said main body, and wherein the maximum value of the thermal expansion coefficient of said supporting body is 5 times or smaller of the maximum value of the thermal expansion coefficient of said main body.
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