Optical waveguide device, and optical modulation device and optical transmission apparatus using same
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsKosuke Okahashi, Yu Kataoka
Life of this patent
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Abstract
An object of the present invention is to provide an optical waveguide device that suppresses optical absorption even in a case where an electrode clearance is narrow. An optical waveguide device of the present invention includes a substrate 1 on which an optical waveguide 10 is formed, and a control electrode 3 disposed close to the optical waveguide on the substrate, in which the optical waveguide 10 is a protruding optical waveguide, and a shape of a side surface of the control electrode 3 facing the optical waveguide includes an inclined surface 32 having a predetermined angle from the substrate and a curved surface 33 that is contiguous to the inclined surface and that forms a curved recess.
Claims6
An optical waveguide device comprising:
- a substrate on which an optical waveguide is formed;
- and
- control electrodes for modulating the light wave propagating through the optical waveguide which is disposed on the substrate,
- wherein the optical waveguide is a protruding optical waveguide,
- the control electrodes are not in contact with the protruding optical waveguide,
- a shape of a side surface of each of the control electrodes facing the protruding optical waveguide includes an inclined surface having a predetermined angle with the substrate and a curved surface that is contiguous to the inclined surface and that forms a curved recess,
- a position that changes from the inclined surface to the curved surface is provided at a position lower than a height of the protruding optical waveguide, and
- a top portion of the curved surface is higher than the height of the protruding optical waveguide.
Dependencies are inferred from the claim text.