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:
Dec. 01, 2015
Filed:
Feb. 03, 2015
Fujikura Ltd., Tokyo, JP;
Tomoharu Kitabayashi, Sakura, JP;
FUJIKURA LTD., Tokyo, JP;
Abstract
A fiber laser device includes: a pumping light source that emits pumping light; an amplification optical fiber that amplifies signal light using the pumping light and emits the signal light; a first FBG that is provided on one side of the amplification optical fiber and reflects the signal light; a second FBG that is provided on the other side of the amplification optical fiber and reflects the signal light at a reflectance lower than a reflectance of the first FBG; a detecting unit that detects with priority to light in a wavelength range between a wavelength 15 nm below and above the maximum reflection wavelength range, in which the reflectance of the first FBG is at the maximum, among lights at the other wavelengths in the light passed through the first FBG from the amplification optical fiber side.