Patent · US Expired

Optical-fiber gyroscope of sagnac type having a fiber-optic loop and 3.times.3 coupler

US4944590A · kind A · utility

13Cited by

4References

4Claims

0Family size

Assignee

Messerschmitt Bolkow Blohm GmbH · DE

Inventors

Hans Poisel · Leinburg, DE
Gerd Trommer · Munich, DE

Key dates

Filing date	Feb 24, 1989
Grant date	Jul 31, 1990
Priority date	—
Expiry date	Feb 24, 2009

Classification

Technology area (CPC G)Physics
CPC primaryG01C19/725
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An optical-fiber gyroscope of the Sagnac type consists of a fiber-optic loop and a 3.times.3 coupler, composed of three optically coupled fiber-optic guides, whereby a first fiber-optic guide of the 3.times.3 coupler is coupled to an optical radiation source and the two other fiber-optic guides of the 3.times.3 coupler are coupled on one end to one end of the fiber-optic loop and, on the other end, to a radiation detecting instrument. The first fiber-optic guide of the 3.times.3 coupler features a radiation detecting instrument on the end opposite the radiation source, with which interference-related variations in the light source, as well as in the 3.times.3 coupler, can be detected.

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