Optical-fiber gyroscope of sagnac type having a fiber-optic loop

Details Optical-fiber gyroscope of sagnac type having a fiber-optic loop Optical-fiber gyroscope of sagnac type having a fiber-optic loop

1989-02-24

1990-07-31

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

350 9615, G01B 902

Patent

active

049445901

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.

REFERENCES:
patent: 4440498 (1984-04-01), Sheem
patent: 4479715 (1984-10-01), Sheem
patent: 4653917 (1987-03-01), Moeller et al.
patent: 4662751 (1987-05-01), Goss et al.

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