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. 29, 2007
Filed:
Mar. 04, 2002
Yasushi Sugaya, Kawasaki, JP;
Miki Takeda, Kawasaki, JP;
Susumu Kinoshita, Kawasaki, JP;
Terumi Chikama, Kawasaki, JP;
Yasushi Sugaya, Kawasaki, JP;
Miki Takeda, Kawasaki, JP;
Susumu Kinoshita, Kawasaki, JP;
Terumi Chikama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, and an optical system which maintains a second light output of the second-stage light amplifier at a constant power level. The first-stage and second-stage light amplifiers have different gain vs wavelength characteristics so that the multi-wavelength light amplifier has no wavelength-dependence of a gain thereof.