Optical gyroscope with time dependent wavelength

Details Optical gyroscope with time dependent wavelength Optical gyroscope with time dependent wavelength

1981-07-02

1983-10-11

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902, G01C 1964

Patent

active

044088825

ABSTRACT:
A Sagnac rotation sensing interferometer disposed on a rotating platform use as a gyroscope comprising a wound optical fiber light path, a beam splitter for splitting a light beam into two beams directed to traverse the optical path in opposite directions, a light source circuit for generating a light beam which is switched between two wavelengths at a switching or modulation frequency substantially higher than the speed of change of the phase due to rotation, and a detector for extracting a signal from the recombined beam interference pattern at the wavelength modulation frequency, this signal being proportional to the phase shift caused by rotation.

REFERENCES:
patent: 3102953 (1963-09-01), Wallace
patent: 4013365 (1977-03-01), Vali et al.
patent: 4147979 (1979-04-01), Baues et al.
patent: 4223977 (1980-09-01), Papuchon et al.

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