Optical waveguide devices
AssigneeNGK Insulators, Ltd.
InventorsOsamu Mitomi, Kenji Aoki, Jungo Kondo, Yuichi Iwata, Tetsuya Ejiri
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Abstract
It is provided an optical waveguide device in which the radius of curvature of a curved part of an optical waveguide can be lowered and the radiation loss of light in the curved part can be reduced. An optical waveguide device 2 has a ferroelectric optical waveguide substrate and an optical waveguide 5 formed in or on the substrate and modulating electrodes 4A, 4B and 4C. The thickness of the optical waveguide substrate is 30 μm or smaller at least in a region where the optical waveguide is formed. The optical waveguide has curved part having a radius of curvature of 30 mm or smaller.
Claims10
An optical waveguide device comprising a ferroelectric optical waveguide substrate and an optical waveguide formed in or on said optical waveguide substrate, wherein said optical waveguide substrate has a thickness of 30 μm or smaller at least in a region where said optical waveguide is formed, said optical waveguide comprises a curved part having a radius of curvature of 30 mm or smaller, and said device further comprises a recess formed in said optical waveguide substrate on the same side as said optical waveguide and outwardly of said curved part with respect to the center of curvature of said curved part.
An optical waveguide device comprising a ferroelectric optical waveguide substrate and an optical waveguide formed in or on said optical waveguide substrate, wherein said optical waveguide substrate has a constant thickness of 30 μm or smaller across an entire width of said optical waveguide substrate, and wherein said optical waveguide comprises a crossing part.
Dependencies are inferred from the claim text.