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. 28, 2026
Filed:
Sep. 24, 2021
Nec Corporation, Tokyo, JP;
Ryu Kurahashi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A submarine optical communication system comprising a first terminal station, a second terminal station, a third terminal station, a first branching device, and a first branching/insertion device, wherein the first and second terminal stations transmit each of first and second control signals in a control wavelength band at different times from each other in order to transmit control signals from the plurality of terminal stations to the first branching device and the first branching/insertion device, the first branching device includes a first reception circuit capable of receiving the first control signal and a fourth reception circuit configured to receive an optical signal in the control wavelength band, and the first branching/insertion device includes a second reception circuit capable of receiving the first control signal and a third reception circuit capable of receiving the second control signal.