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:
Jan. 28, 1997
Filed:
Aug. 22, 1995
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The optical fiber amplifier includes a rare earth doped optical fiber and a pumping light source for outputting pumping light for pumping the rare earth doped optical fiber, the optical fiber amplifier optically amplifying signal light received at an input end and outputting the amplified signal light from an output end, wherein the optical fiber amplifier further includes an optical fiber resonator for laser-oscillating a portion of light of spontaneous emission generated in the rare earth doped optical fiber, which has a wavelength shorter than the wavelength of the signal light, thereby to keep a gain substantially fixed independent of a variation in the wavelength of the signal light.