Fiber-optic gyroscope with reduced bias drift error caused by op

Details Fiber-optic gyroscope with reduced bias drift error caused by op Fiber-optic gyroscope with reduced bias drift error caused by op

1989-11-17

1991-06-25

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

050261614

ABSTRACT:
Bias drift error caused by optical back-reflections of clockwise and counterclockwise rotating beams in an integrated optic fiber-optic gyro and originating at a chip/coil interface are reduced by using a chip architecture designed so that the pathlength over which one of the beams is transmitted before being coupled into a fiber-optic coil and the pathlength over which the other beam is transmitted are different. The difference is provided by bending a waveguide transmitting the one beam, with said bending being enhanced by the application of the Titanium Indiffused Proton Exchange process.

REFERENCES:
patent: 4265541 (1981-05-01), Leclerc et al.
patent: 4400088 (1983-08-01), Schiffner
patent: 4915503 (1990-04-01), Pavlath

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