Sagnac-type fiber-optic gyroscope

Details Sagnac-type fiber-optic gyroscope Sagnac-type fiber-optic gyroscope

1990-08-09

1992-06-02

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

385 14, G01C 1972

Patent

active

051181908

ABSTRACT:
A Sagnac-type fiber-optic gyroscope having a light source, a fiber coil consisting of an optical fiber, a receiver arrangement which are all connected with gates of a directional coupler, in which the light fed into the fiber coil interferes with the light emerging from the fiber coil in a coupling area and the rate of rotation of the fiber-optic gyroscope is determined from the interference signals. In order to achieve a working point which is situated in or close to the quadrature point, the directional coupler is developed as a 4.times.4 coupler between the arms of which fixed phase relations are provided in the coupling area.

REFERENCES:
patent: 4440498 (1984-04-01), Sheem
patent: 4573797 (1986-03-01), Burns et al.
patent: 4822128 (1989-04-01), Imoto et al.

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