Patent · US Active

Suppression of lock-in effect due to a MIOC frequency response in a fiber-optic Sagnac interferometer

US9518825B2 · kind B2 · utility

0Cited by

8References

6Claims

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Assignee

NORTHROP GRUMMAN LITEF GMBH · DE

Inventors

Guenter Spahlinger · Stuttgart, DE
Olaf Deppe-Reibold · Emmendingen, DE

Key dates

Filing date	Mar 12, 2014
Grant date	Dec 13, 2016
Priority date	—
Expiry date	Oct 14, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01C19/726
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A fiber-optic Sagnac interferometer in a rotation rate sensor comprises a multifunctional integrated optical chip (MIOC) with a MIOC transfer function. A digital filter is connected upstream to the multi-functional integrated optical chip, whose filter transfer function corresponds basically to the inverse MIOC transfer function such that the MIOC transfer function is compensated by the filter transfer function. Corresponding coefficients of the filter transfer function may be determined in a main control loop.

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