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:
Jun. 23, 2026
Filed:
Mar. 30, 2022
Applicant:
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Inventors:
Toshio Kataoka, Tokyo, JP;
Norikazu Miyazaki, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/122 (2006.01); G02B 6/12 (2006.01);
U.S. Cl.
CPC ...
G02B 6/122 (2013.01); G02B 2006/12097 (2013.01); G02B 2006/12142 (2013.01);
Abstract
An optical waveguide device that can efficiently remove a high-order mode light beam and that is also easily manufactured even in a case where a width or a height of an optical waveguide is small is provided. An optical waveguide device includes a substrateon which a rib type optical waveguideis formed, and a slab waveguide SW disposed close to the rib type optical waveguide, in which roughness of at least a part (SF) of an upper surface of the slab waveguide SW is larger than roughness (SF) of a surface of a top portion of the rib type optical waveguide.