The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 2021
Filed:
Sep. 13, 2017
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Yohei Hokama, Tokyo, JP;
Koichi Akiyama, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
The object is to provide a technology capable of efficiently injecting a current into a core layer of a buried waveguide. On one end side of the substrate, a buried waveguide including a core layer, a cladding layer, and a current blocking layer is disposed, both sides of the core layer in a layer-stacking direction are sandwiched by the cladding layer, and both sides of the core layer in a width direction that is perpendicular to the layer-stacking direction are sandwiched by the current blocking layer. On another end side of the substrate, a ridge waveguide including the core layer and the cladding layer is disposed, and both sides of the core layer in the layer-stacking direction are sandwiched by the cladding layer.