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:
Jul. 12, 2016
Filed:
Apr. 23, 2015
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventor:
Tatsuya Tsuzuki, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/30 (2006.01); H01S 3/13 (2006.01); H04B 10/291 (2013.01); H04B 10/294 (2013.01); H04J 14/02 (2006.01); H04B 10/564 (2013.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01);
U.S. Cl.
CPC ...
H01S 3/302 (2013.01); H01S 3/1301 (2013.01); H01S 3/1305 (2013.01); H04B 10/294 (2013.01); H04B 10/2916 (2013.01); H04B 10/2942 (2013.01); H04B 10/564 (2013.01); H04J 14/0221 (2013.01); G02F 2203/585 (2013.01); H01S 3/094096 (2013.01); H04Q 2213/13295 (2013.01);
Abstract
A Raman amplifier includes: a pump light generator that provides a plurality of pump light beams with different wavelengths for an optical transmission medium; a gain monitor that monitors an average Raman gain in the optical transmission medium; a storage unit that stores ratio information indicating a ratio of power of the plurality of pump light beams for a specified gain characteristic with respect to an average Raman gain in the optical transmission medium; and a controller that controls the power of the plurality of pump light beams based on the average Raman gain monitored by the gain monitor and the ratio information.