Patent · US Expired

Current measurement method and device based on a fiber optic in-line Sagnac interferometer

US7102757B2 · kind B2 · utility

4Cited by

3References

3Claims

0Family size

Assignee

LITEF GmbH · DE

Inventors

Gunter Spahlinger · Stuttgart, DE
Sven Voigt · Glückstadt, DE

Key dates

Filing date	Mar 15, 2002
Grant date	Sep 5, 2006
Priority date	—
Expiry date	Mar 6, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG01R15/246
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device for current measurement based on a fiber-optic in-line Sagnac interferometer includes a birefringence phase modulator for non-reciprocal phase modulation of two orthogonal polarization modes of a light beam passing through the interferometer. The phase modulator is a digital phase modulator that is directly digitally drivable to permit simplification of the corresponding signal processing or driving electronics unit.

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