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:
Oct. 24, 2023
Filed:
Feb. 20, 2020
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Shota Kita, Tokyo, JP;
Masaya Notomi, Tokyo, JP;
Akihiko Shinya, Tokyo, JP;
Kengo Nozaki, Tokyo, JP;
Kenta Takata, Tokyo, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2013.01); H04B 10/556 (2013.01);
U.S. Cl.
CPC ...
H04B 10/556 (2013.01);
Abstract
An optical IQ modulator includes: Y branching elements, which are cascade-connected, each of which has one input and two outputs; QPSK modulators configured to perform QPSK modulation on continuous light branched by the Y branching elements to generate signal light; and Y combining elements, which are cascade-connected, each of which has two inputs and one output.