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. 05, 2017
Filed:
Jun. 24, 2015
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Fujitsu Telecom Networks Limited, Kawasaki-shi, Kanagawa, JP;
Koji Bato, Fukuoka, JP;
Tomoyuki Sakata, Fukuoka, JP;
Tatsuro Kishida, Fukuoka, JP;
Koji Matsunaga, Munakata, JP;
Tatsuya Toyozumi, Onojo, JP;
Yuichiro Sakane, Fukuoka, JP;
Wataru Kawasaki, Kanagawa, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An optical transmitter includes a dummy optical source, a polarized wave beam coupler, and an auto gain control (AGC)-system amplifier. The dummy optical source outputs, out of an optical signal in which an optical path signal and an optical packet signal are mixed, a dummy signal having a wavelength identical to that of the optical packet signal. The polarized wave beam coupler multiplexes the dummy signal with the optical signal so that the dummy signal is orthogonal to the optical signal so as to output an output signal. The AGC-system amplifier inputs the output signal, and amplifies the output signal with a predetermined amplification factor corresponding to a power difference between input power and output power of an optical amplifier.