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:
Sep. 01, 2026
Filed:
Mar. 18, 2024
Sumitomo Electric Industries, Ltd., Osaka, JP;
Takafumi Ohtsuka, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical fiber amplifier includes a first rare-earth element doped optical fiber including a first region including a center of a first core configured to guide signal light, a second region surrounding the first region and doped with a rare-earth element, and a third region surrounding the second region. The optical fiber amplifier includes a second rare-earth element doped optical fiber provided on a signal output-side of the first rare-earth element doped optical fiber, the second rare-earth element doped optical fiber including a fourth region including a center of a second core configured to guide the signal light, and the fourth region being doped with the rare-earth element. The second rare-earth element doped optical fiber includes a fifth region surrounding the fourth region, and includes a sixth region surrounding the fifth region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile