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, 2023
Filed:
Mar. 09, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Hiroki Kawahara, Tokyo, JP;
Takeshi Seki, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
The present invention is to provide a wavelength cross-connect device that reduces device costs. A wavelength cross-connect deviceB performs relaying for changing, using WSSs, routes of optical signals transmitted from M routesto Mh, in which K optical fibersto Kf are grouped for each of the routes, on an input side to output the optical signals to respective optical fibersto Kf of M routesto Mh on an output side. Input ports of each of the optical couplerstoare connected to output ports of each of first WSSsto. Further, the input ports of each of the optical couplerstoare connected to the output ports of the first WSSstoand output ports of each of the optical couplerstoare connected to input ports of second WSSstosuch that the optical signals input from the optical fibersto Kf in each of the routesto Mh on the input side are capable of being output to the optical fibersto Kf in each of the routesto Mh on the output side, respectively.