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:
Dec. 23, 2025
Filed:
Sep. 28, 2021
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Yuji Yamane, Tokyo, JP;
Shingo Takano, Tokyo, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Abstract
To provide an optical waveguide device that is small, has low optical loss, and has long-term stability. Provided is an optical waveguide device in which an optical waveguide A () is formed on a first substrate (), an end portion of the first substrate has an input portion that inputs a light wave into the optical waveguide A or an output portion that outputs a light wave from the optical waveguide A, an optical waveguide B () is formed on a second substrate (), the second substrate has an optical modulation portion that modulates a light wave propagating through the optical waveguide B, and at least a part of the optical waveguide A () has a conversion portion () that converts an optical mode field diameter.