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. 19, 2022
Filed:
Nov. 12, 2018
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Toshiro Sakamoto, Tokyo, JP;
Tatsushi Yagi, Tokyo, JP;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Abstract
An optical waveguideincludes a substrate, a core layer, a support, and a suppressing portion. The core layerincludes a light propagating portionand a diffraction grating portion. The diffraction grating portionincludes a fine line pattern formed therein. The supportis made from a material having a smaller refractive index than a refractive index of the core layer. The supportsupports the core layerwith respect to the substrate. The suppressing portion suppresses deformation of fine linesthat form the fine line pattern. The supportis not provided in an entire region between the light propagating portionand the substratein a cross-section perpendicular to a longitudinal direction of the core layerat least at a position in the longitudinal direction.