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:
May. 31, 2016
Filed:
May. 14, 2014
Fujikura Ltd., Tokyo, JP;
Tomoharu Kitabayashi, Sakura, JP;
FUJIKURA LTD., Tokyo, JP;
Abstract
A fiber laser includes: an amplification optical fiber; a pumping light source configured to emit pumping light to pump the active element of the amplification optical fiber; a first mirror provided on one side of the amplification optical fiber; and a second mirror provided on the other side of the amplification optical fiber. When an optical loss between the first mirror and the second mirror is equal to an optical gain in the amplification optical fiber, a difference between a gain of light having a wavelength at which a gain becomes maximum and a gain of light having a wavelength reflected off the first mirror and the second mirror is 35 dB or less in the amplification optical fiber.