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. 24, 2026
Filed:
Feb. 19, 2020
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Assignee:
NTT, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/00 (2006.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01); H01S 3/16 (2006.01);
U.S. Cl.
CPC ...
H01S 3/06716 (2013.01); H01S 3/094003 (2013.01); H01S 3/1603 (2013.01);
Abstract
An object of the present disclosure is to allow gain compensation with a simple configuration without adding a new device to the outside. The present disclosure discloses a rare earth doped fiber including a core doped with a rare earth and a cladding region around the core, wherein one or more cavities are provided inside the core, and at least one of the cavities are provided along a longitudinal direction of the rare earth doped fiber.
Yamashita, Yoko. (2026). Rare earth doped fiber and fiber optic amplifier (U.S. Patent No. 12586973). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12586973
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile