Patent · US Active

Low crosstalk, common path, dual ring sagnac interferometer for disturbance sensing

US10598544B2 · kind B2 · utility

3Cited by
4References
5Claims
0Family size

Inventors

Key dates

Filing dateJul 27, 2018
Grant dateMar 24, 2020
Priority date—
Expiry dateJul 27, 2038

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04B10/2587
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Embodiments of the present disclosure include a low crosstalk, optical fiber based disturbance detection system that includes single-mode optical fiber (SMF) arranged into dual ring Sagnac interferometer wherein both rings share a common sensing section of optical fiber path length. Certain embodiments further include fiber Bragg gratings (FBG's), circulators and couplers to be able to separate the optical signals of the two rings of the dual ring Sagnac interferometer and to perform processing of their individual signals. Embodiments are also disclosed that enable the position of a physical disturbance, the magnitude of the physical disturbance and the frequency of the physical disturbance to be known.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.