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:
Jul. 02, 2024
Filed:
Sep. 23, 2020
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Yu Kataoka, Tokyo, JP;
Norikazu Miyazaki, Tokyo, JP;
SUMITOMO OSAKA CEMENT CO., LTD., Tokyo, JP;
Abstract
Provided is an optical waveguide element that prevents leaked light generated at a forking section from entering a downstream optical waveguide such as another forking section, thereby affording minimal degradation of optical characteristics. The optical waveguide is characterized in that: at least one of two fork waveguides () forking from a first forking section () comprises a second forking section (); slab waveguides (-to-) are formed between the two fork waveguides; and between the first forking section and the second forking section, slits () are formed that partition the slab waveguides into a first slab waveguide area (-) close to the first forking section and second slab waveguide areas (--) close to the second forking section(s).