End device of optical waveguide and optical filter
AssigneeDenso Corporation
InventorsYuki KAMATA, Toshihiro ODA
Life of this patent
Estimating the term…
Abstract
A first optical waveguide is formed on a semiconductor substrate in such a way that the first optical waveguide is surrounded by clad layers. An outside portion of the first optical waveguide is formed as a terminator, which includes a taper portion and a bending structure portion. The taper portion has a width, which is gradually reduced in a direction to a forward end of the first optical waveguide. The taper portion coverts a light confinement condition from a strong condition to a weak condition in the direction to the forward end of the first optical waveguide. The bending structure portion has an arc shape extending from an outside end of the taper portion on a plane parallel to a surface of the semiconductor substrate.
Claims9
An end device for an optical waveguide, which is formed on a semiconductor substrate and surrounded by a clad layer, wherein the end device is provided at a longitudinal end of a main waveguide portion of the optical waveguide, comprising:
- a converting portion for converting a condition of light confinement from a strong condition to a weak condition in a direction to an outside end of the converting portion;
- and
- a bending structure portion connected to the outside end of the converting portion and formed in an arc shape on a plane parallel to a surface of the semiconductor substrate.
Dependencies are inferred from the claim text.