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:
Aug. 04, 2026
Filed:
Dec. 24, 2020
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventor:
Rintaro Kitahara, Sakura, JP;
Assignee:
Fujikura Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/067 (2006.01); G02B 6/02 (2006.01); H01S 3/094 (2006.01); H01S 3/0941 (2006.01);
U.S. Cl.
CPC ...
H01S 3/06708 (2013.01); G02B 6/02009 (2013.01); H01S 3/0675 (2013.01); H01S 3/094003 (2013.01); H01S 3/09415 (2013.01);
Abstract
An optical fiber includes a core and a cladding. An effective area Aof light of a fundamental mode, having a wavelength of 1070 nm and propagating through the core, is 500 μmor more. A numerical aperture NA of the core satisfies the following formula: where a (m) is a radius of the core and b (m) is a radius of the cladding. A V value, that is a waveguide parameter of the optical fiber, satisfies the following formula: