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:
Apr. 22, 2008
Filed:
Mar. 09, 2006
Etsuko Hayashi, Yamato, JP;
Tomoto Tanaka, Kawasaki, JP;
Yasushi Sugaya, Kawasaki, JP;
Miki Onaka, Kawasaki, JP;
Etsuko Hayashi, Yamato, JP;
Tomoto Tanaka, Kawasaki, JP;
Yasushi Sugaya, Kawasaki, JP;
Miki Onaka, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A Raman amplifier for amplifying a wavelength division multiplexed (WDM) light including signal lights wavelength division multiplexed together. The amplifier includes an optical amplifying medium and a controller. The optical amplifying medium uses Raman amplification to amplify the WDM light in accordance with multiplexed pump lights of different wavelengths traveling through the optical amplifying medium. The WDM light is amplified in a wavelength band divided into a plurality of individual wavelength bands. The controller controls power of each pump light based on a wavelength characteristic of gain generated in the optical amplifying medium in the individual wavelength bands.