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. 20, 2021
Filed:
Apr. 02, 2018
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventor:
Takuya Oda, Chiba, JP;
Assignee:
Fujikura Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/30 (2006.01); G02B 6/14 (2006.01);
U.S. Cl.
CPC ...
G02B 6/30 (2013.01); G02B 6/14 (2013.01);
Abstract
An optical module includes: a substrate-type optical waveguide device; and an optical fiber that guides light that enters or exits the waveguide device. Spot sizes wand wsatisfy 1<w/w<α; wis a spot size: on an end surface of the substrate-type optical waveguide device, and of a waveguide mode guided through a core of the substrate-type optical waveguide device, wis a spot size: on an end surface of the optical fiber, and of a waveguide mode guided through a core of the optical fiber, and a is a spot size ratio w/wat which an efficiency η(0) is equal to the efficiency η(0) when w/w=1.