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. 15, 2022
Filed:
Feb. 19, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Jun Endo, Tokyo, JP;
Atsushi Aratake, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical waveguide connection structure connects a Si waveguide and an optical fiber to each other with a bonding layer interposed therebetween. The Si waveguide has a core whose cross-sectional area in the direction perpendicular to the direction of propagation of light decreases toward the optical fiber, and a cladding that covers the core. The optical fiber has a fiber core, a fiber cladding that covers the fiber core, and a recess formed in an end face opposed to the Si waveguide. The bonding layer fills a gap between the end face of the Si waveguide and the end face of the optical fiber and the recess, and the bonding layer has a refractive index greater than the refractive index of the fiber core of the optical fiber.