| 摘要 |
[Problem] An optical device compensates temperature drift by compensating a refractive index deviation caused by generation of stress irrespective of the position of the waveguide on the substrate. The optical device includes a substrate (2) having an electrooptic effect; a plurality of optical waveguides (3b-1 and 3b-2) disposed over the substrate (2) in parallel to one another; and a polarization inversion region (6) which is disposed a part of the substrate (2) and which has a polarization characteristic that is an inverse to that of the substrate (2), wherein a profile of a boundary between the polarization inversion region (6) and a remaining region (7) in which the polarization is not inverted is configured such that accumulated amounts of distortion that affects the respective waveguides (3b-1 and 3b-2) over coordinates along a light propagation direction are substantially identical.
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