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:
Jun. 24, 2025
Filed:
Feb. 28, 2024
Applicants:
Meiji University, Tokyo, JP;
Softbank Corp., Tokyo, JP;
Inventor:
Shiro Ryu, Tokyo, JP;
Assignee:
MEIJI UNIVERSITY & SoftBank Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/07 (2013.01); H04B 10/079 (2013.01); H04J 14/02 (2006.01);
U.S. Cl.
CPC ...
H04B 10/0795 (2013.01); H04J 14/0307 (2023.08);
Abstract
A detection device for detecting polarization fluctuation of signal light having propagated through an optical transmission line includes: a differential phase information acquisition unit which acquires information indicating a differential phase of input light as an evaluation target at each of one or more time points; and a determination unit which determines whether the differential phase at at least some of the one or more time points satisfies a predetermined condition.