Patent · US Active

Fiber-optic sensor and method

US10247761B2 · kind B2 · utility

3Cited by

8References

22Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Georg Muller · Neuss, DE
Klaus Bohnert · Oberrohrdorf, CH
Andreas Frank · Sindelfingen, DE
Philippe Gabus · Nyon, CH

Key dates

Filing date	Jun 20, 2016
Grant date	Apr 2, 2019
Priority date	—
Expiry date	Mar 11, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG01R19/32
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A fiber optic sensor and related method are described, with the sensor including a cross-coupling element in the optical path between a polarizing element and a sensing element, but separated from the sensing element itself; with the cross-coupling element generating a defined cross-coupling between the two orthogonal polarization states of the fundamental mode of a polarization maintaining fiber guiding light from the light source to the sensing element thus introducing a wavelength-dependent or temperature-dependent sensor signal shift to balance wavelength-dependent or temperature-dependent signal shifts due to other elements of the sensor, particularly signal shifts due to the wavelength dependence of the Faraday effect or the electro-optic effect constant.

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