Integrated optic gyro with one Bragg transducer

Details Integrated optic gyro with one Bragg transducer Integrated optic gyro with one Bragg transducer

1992-06-23

1994-06-28

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

053251741

ABSTRACT:
A laser gyroscope is provided that utilizes a single frequency shifter, in the form of a Bragg cell, to adjust the frequencies of counter-rotating optical signals in a thin film waveguide to achieve resonance along the optical path encountered by each of the signals. The system also utilizes two voltage to frequency convertors, each of which outputs an RF signal to a respective frequency shifter. Each voltage to frequency convertor is modulated by a modulation signal that includes a DC component and an RF signal. The single frequency shifter approach results in fewer required components for proper operation of the thin film laser gyroscope. Redundant back-up components can be added to the gyroscope to guard against the event of a component failure. Alternately, the laser gyroscope is inherently more tolerable of low fabrication yield because of the redundancies.

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patent: 4747111 (1988-05-01), Trutna, Jr. et al.
patent: 4786172 (1988-11-01), Zomick

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