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. 23, 2024
Filed:
May. 19, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical modulator includes a substrate having a main surface including a first area and a second area, an optical modulation portion disposed on the first area, and an optical waveguide portion disposed on the second area. The optical modulation portion includes a first mesa waveguide and an electrode connected to the first mesa waveguide. The first mesa waveguide includes a p-type semiconductor layer, a first core layer, and an n-type semiconductor layer. The optical waveguide portion includes a second mesa waveguide. The second mesa waveguide includes a first cladding layer, a second core layer, and a second cladding layer. The second core layer is optically coupled to the first core layer. The first cladding layer contains a p-type dopant and protons. The second cladding layer contains an n-type dopant.