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:
Feb. 15, 2022
Filed:
Apr. 09, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Etsushi Yamazaki, Musashino, JP;
Yoshiaki Kisaka, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An optical transmission system includes an optical transmitter configured to generate a plurality of optical signals encoded and modulated with the same client data being carriers with the same wavelength, and having different carrier phases, and output the plurality of generated optical signals using a plurality of optical transmitter output ports, each of the optical transmitter output ports corresponding to one of the plurality of optical signals, and one or a plurality of first directional couplers including a plurality of first input ports, each of the first input port connected to a corresponding one of the plurality of optical transmitter output ports.