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:
Jan. 21, 2025
Filed:
Jul. 06, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Hiroki Kawahara, Musashino, JP;
Takeshi Seki, Musashino, JP;
Sachio Suda, Musashino, JP;
Kohei Saito, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical node device includes a transmission transponder, WSSs, a beam splitter, and a monitoring transponder. The transmission transponder transmits an optical signal via an optical path set in an optical fiber. The WSSs ultiplex, on the transmitted optical signal, a monitoring control signal for performing optical path tracing that is confirmation of conduction along the optical path. The monitoring transponder measures and monitors the optical power of the monitoring control signal multiplexed into the optical signal branched by the beam splitter, and further monitors whether the monitored optical power is equal to or higher than a predetermined level indicating normality of the optical path.