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:
Mar. 29, 2016
Filed:
Sep. 13, 2012
Tetsuya Mori, Tokyo, JP;
Kimio Moriya, Tokyo, JP;
Tetsuya Mori, Tokyo, JP;
Kimio Moriya, Tokyo, JP;
SUMITOMO BAKELITE CO., LTD., Tokyo, JP;
Abstract
A core layer () of an optical waveguide () includes a plurality of core groups () disposed so as to mutually intersect on the same plane, each core group () being an assembly of a plurality of core portions (), at least some of which are arranged in parallel, and side cladding portions () provided so as to adjoin the side surfaces of each core portion (). A transverse cross-section of the optical waveguide () includes a high refractive index region (WH) in a position corresponding with each core portion () and having a relatively high refractive index, and a low refractive index region (WL) in a position corresponding with each side cladding portion () and having a lower refractive index than the high refractive index region (WH), and a refractive index distribution is formed in which the refractive index varies continuously across the entire distribution.