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:
Aug. 04, 2026
Filed:
Sep. 13, 2021
Ntt, Inc., Tokyo, JP;
Shingo Ono, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
An optical fiber sensing device of the present disclosure includes: an optical fiber sensor system including a plurality of sensor units having different propagation delay times; a first light source for outputting an incident light to the optical fiber sensor system; a second light source for outputting a local light for combining with a transmitted light through the optical fiber sensor system; and a signal processing unit for detecting a change in an optical fiber using a received light signal I(t) obtained by combining the transmitted light and the local light, and, given that τi is an inter-optical-path propagation delay time difference at an i-th sensor unit of the sensor units, a change at the i-th sensor unit is derived using an autocorrelation between an optical intensity I(t) at the sensor unit and a signal I(t+τi) obtained by shifting the optical intensity I(t) by a time τi.
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