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US 2006/0133726 A1Published application
Optical waveguide, optical device, and method of manufacturing optical waveguide
AssigneeFujitsu Limited
InventorsMasaki Sugiyama, Tadao Nakazawa
Life of this patent
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Abstract
An optical waveguide is formed on a substrate and includes a curved ridge structure, a curved optical path, and a buffer layer. The curved ridge structure is formed on the substrate so as to have a curvature in a longitudinal direction of the curved ridge structure. The curved optical path is formed along the curved ridge structure. The buffer layer covers a side of the ridge structure and has a lower refractive index than a refractive index of the substrate.
Claims22
An optical waveguide that is formed on a substrate, comprising:
- a curve core for guiding an optical signal;
- an outer groove that is formed by digging down the substrate along an outer circumference of the curved core and that has a side surface facing to the curved core;
- and
- a buffer layer that covers the side surface and that has a lower refractive index than a refractive index of the substrate.
1 more element
An optical waveguide that is formed on a substrate, comprising:
- a curved core for guiding an optical signal;
- a ridge that is formed by digging down the substrate along the curved core;
- and
- a buffer layer that covers a side surface and a top surface of the ridge and that has a lower refractive index than a refractive index of the substrate.
1 more element
Dependencies are inferred from the claim text.