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:
Jul. 30, 2013
Filed:
Nov. 05, 2010
Masahiro Kashiwagi, Sakura, JP;
Kensuke Shima, Sakura, JP;
Masahiro Kashiwagi, Sakura, JP;
Kensuke Shima, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
There are provided an amplification optical fiber, and an optical fiber amplifier and a resonator using the same capable of outputting light of high beam quality even when a higher-order mode that is axially symmetric is excited in addition to LP01 mode. An amplification optical fiberincludes: a core; a cladcoating the core; and an outer cladcoating the clad, wherein the corehas a larger refractive index than the clad, the coreallows light having a predetermined wavelength to propagate in at least LP01 mode and LP02 mode, and in the core, active element that stimulates to emit light of the predetermined wavelength is doped at a higher concentration at a position where an intensity of the LP02 mode becomes zero than center of the core