Optical-fiber gyroscope

Details Optical-fiber gyroscope Optical-fiber gyroscope

1990-08-29

1991-08-06

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

050372041

ABSTRACT:
An optical-fiber gyroscope of the Sagnac type having an optical fiber coil and a 3.times.3 coupler comprising three optically coupled fiber optic guides. A first fiber optic guide of the 3.times.3 coupler is coupled at one end to a first optical radiation source, whose radiation intensity is detected directly by a radiation detector. The two other fiber optic guides of the 3.times.3 coupler are each coupled to respective ends of an optical fiber coil and, at the other ends of each of the two other fiber optic guides, to respective radiation detectors. The first fiber optic guide of the 3.times.3 coupler features a second optical radiation source, which is modulated by a frequency which differs from the modulation frequency of the first radiation source.

REFERENCES:
patent: 4440498 (1984-04-01), Sheem
patent: 4444503 (1984-04-01), Schiffner
patent: 4491413 (1985-01-01), Rashleigh
patent: 4529312 (1985-07-01), Pavlath et al.
patent: 4786172 (1988-11-01), Zomick

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