Patent ID: 9002165
Filing Date: 2015-04-07
Classification: G02B,G02F

Abstract:
1. An optical waveguide device, comprising: an optical waveguide substrate having a thickness of 30 μm or less; and a holding substrate that holds the optical waveguide substrate, wherein the optical waveguide substrate and the holding substrate are bonded to each other by an adhesive layer, the holding substrate is a substrate formed from a liquid crystal polymer having permittivity lower than that of the optical waveguide substrate, coefficients of thermal expansion of the optical waveguide substrate and the holding substrate have anisotropy in each substrate plane, a relative direction between the optical waveguide substrate and the holding substrate is adjusted in such a manner that each of the axes with a larger coefficient of thermal expansion and with a smaller coefficient of thermal expansion in the anisotropic axial directions of the optical waveguide substrate are aligned with each of the axes with a larger coefficient of thermal expansion and with a smaller coefficient of thermal expansion in the anisotropic axial directions of the holding substrate.