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:
Sep. 04, 2012
Filed:
Jul. 06, 2011
Hidenori Miyauchi, Sakura, JP;
Hidenori Miyauchi, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide an optical fiber amplifier capable of suppressing oscillation of ASE. The optical fiber amplifier includes a second amplifier fiberdoped with a rare earth element; a second pumping sourcethat supplies pump light to the second amplifier fiber; a storage unitfor storing a relationship between oscillation threshold pump power and temperature of the second amplifier fiber, the oscillation threshold pump power being power of the pump light which causes oscillation of ASE in a different wavelength range from a signal wavelength range produced by the second amplifier fiber; and a temperature controllerfor controlling the temperature of the second amplifier fiberso that the oscillation threshold pump power is higher than the power of the pump light outputted by the second pumping source, by referring to the relationship stored in the storage unit