Fiber optic sagnac interferometer with digital phase ramp...

Details Fiber optic sagnac interferometer with digital phase ramp... Fiber optic sagnac interferometer with digital phase ramp...

G - Physics

01

C

345/10, 73/53

G01C 19/72 (2006.01)

Patent

CA 2026962

In order to avoid a dead band and to remove scale factor nonlinearities, particularly in the case of low rates of rotation, it is proposed for a fiber optic interferometer rate- of-rotation sensor which is reset by phase ramp via a digital control circuit to use as demodulation signal within the control circuit a signal that is statistically independent of all parasitic signals coming into consideration and originates from a modulation signal generator provided with a random number generator, which moreover provides in a statistically distributed manner a reversal of the phase modulator signal to integral values of .pi./2 of the interferometer characteristic.

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