Fiber optic angular rate sensor including digital phase modulati

Details Fiber optic angular rate sensor including digital phase modulati Fiber optic angular rate sensor including digital phase modulati

1994-05-03

1995-03-21

Lee, John D.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

385 3, 385 12, G01C 1964

Patent

active

054001420

ABSTRACT:
A digital phase modulation arrangement for a fiber optic angular rate sensor utilizes Pockels electro-optical effect operating in the transverse mode. Light travels around a fiber optic coil in clockwise and counterclockwise directions. An error signal corresponding to the phase difference between the clockwise and counterclockwise traveling light is applied to a digital processor which provides a plurality of logic bits. The logic bits are applied to voltage/phase transducers arranged on an integrated optics chip. The voltage/phase transducers are switched from an applied reference voltage to a particular voltage level to induce a phase change through Pockels electro-optical effect.

REFERENCES:
patent: 5116127 (1992-05-01), Grollmann
patent: 5123741 (1992-06-01), Spahlinger
patent: 5214488 (1993-05-01), Buschelberger et al.
patent: 5278631 (1994-01-01), Hollinger et al.
patent: 5280339 (1994-01-01), Hollinger et al.

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