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. 14, 2026
Filed:
Jun. 14, 2021
Nec Corporation, Tokyo, JP;
Yoshirou Satou, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An optical transmission device includes: an optical amplifier that amplifies first signal light; a monitoring light generation unit that generates first monitoring light; an optical multiplexer that couples an output of the optical amplifier and an output of the monitoring light generation unit to output the resultant to a first optical transmission line; an optical demultiplexer for separating light that includes second signal light and second monitoring light and that is inputted through a second optical transmission line, into the second signal light and the second monitoring light; and a control unit that controls the optical amplifier and the monitoring light generation unit on the basis of the reception state of the second signal light and the duration time of emission and reduction of the second monitoring light.
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