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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.:

US 10620369 B1

PDFFull Text
Date of Patent:
Apr. 14, 2020

Filed:

Mar. 06, 2017

Amplification optical fiber and laser device

Applicant:

Fujikura Ltd., Tokyo, JP;

Inventor:

Rintaro Kitahara, Chiba, JP;

Assignee:

Fujikura Ltd., Tokyo, JP;

Attorney:

Osha Liang LLP

Primary Examiner:

Thomas A Hollweg

Assistant Examiner:

Mary A El-Shammaa

Int. Cl.
CPC ...
G02B 6/36 (2006.01); G02B 6/036 (2006.01); H01S 3/067 (2006.01); H01S 3/10 (2006.01); H01S 3/08 (2006.01); G02B 6/02 (2006.01);
U.S. Cl.
CPC ...
G02B 6/03616 (2013.01); G02B 6/03605 (2013.01); G02B 6/03694 (2013.01); H01S 3/067 (2013.01); H01S 3/06729 (2013.01); H01S 3/10007 (2013.01); G02B 6/02047 (2013.01); G02B 6/03633 (2013.01); H01S 3/0675 (2013.01); H01S 3/06733 (2013.01); H01S 3/06754 (2013.01); H01S 3/08045 (2013.01); H01S 2301/03 (2013.01);
Abstract

An amplification optical fiber according to the present invention includes: a core doped with an active element, through which multi-mode light propagates; an inner cladding that surrounds the core and has a refractive index lower than that of the core; and an outer cladding that surrounds the inner cladding and has a refractive index lower than that of the inner cladding. The inner cladding has a polygonal outline in a cross section perpendicular to the longitudinal direction, and the inner cladding has a permanent twist applied by turning around the central axis of the core.

Find Patent Forward Citations

Kitahara, Rintaro. (2020). Amplification optical fiber and laser device (U.S. Patent No. 10620369). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10620369

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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