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:
Oct. 12, 2010
Filed:
Jul. 25, 2008
Bing Yao, Hitachi, JP;
Seiji Kojima, Hitachi, JP;
Kazumasa Ohsono, Hitachi, JP;
Akihito Hongo, Hitachi, JP;
Bing Yao, Hitachi, JP;
Seiji Kojima, Hitachi, JP;
Kazumasa Ohsono, Hitachi, JP;
Akihito Hongo, Hitachi, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
The optical fiberfor an optical fiber laser is provided with a rare earth element doped coredoped with a rare earth element, and a claddingformed at an outer periphery of the rare earth element doped core. In the optical fiberfor an optical fiber laser, the rare earth element doped coreis divided into a plurality of core regions−1,along a longitudinal direction of the optical fiberand dopant concentrations of the rare earth element in respective core regions−1,are different from each other, in order to flatten a temperature distribution of the optical fiberalong the longitudinal direction.