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:
Feb. 18, 2025
Filed:
Feb. 17, 2023
Applicant:
Fujitsu Limited, Kawasaki, JP;
Inventors:
Xiang Zhang, Yokohama, JP;
Atsushi Kodama, Kawasaki, JP;
Tatsuya Tsuzuki, Kawasaki, JP;
Kyosuke Sone, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2013.01); H04B 10/564 (2013.01); H04J 14/02 (2006.01); H04J 14/00 (2006.01);
U.S. Cl.
CPC ...
H04J 14/0221 (2013.01); H04B 10/564 (2013.01);
Abstract
A transmission apparatus includes a signal power detector configured to detect signal power of a wavelength-multiplexed optical signal to be transmitted to a transmission line, a variable optical attenuator configured to attenuate the wavelength-multiplexed optical signal, and a processor configured to control an attenuation amount of the variable optical attenuator according to the signal power and whether a Raman amplifier in which pumping light is inputted to the transmission line exists.