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:
Aug. 18, 2020
Filed:
Jun. 28, 2019
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Tomoyuki Kato, Yokohama, JP;
Takeshi Hoshida, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A compensating device includes at least one detector configured to detect intensity variation of the optical signal, at least one filter configured to extract a band where most of the optical phase distortion is generated from a component of the intensity variation of the optical signal, a control circuit configured to generate, based on the extraction with the at least one filter, a compensation signal exhibiting temporal intensity variation of the input optical signal, at least one compensation signal light source configured to output, based on the compensation signal of a controller, a compensation signal light exhibiting intensity variation in opposite phase to the temporal intensity variation of the input optical signal and having a different wavelength from a wavelength of the optical signal and an optical multiplexer configured to output to a transmission path a signal light formed by combining the optical signal and the compensation signal light.