FIELD: measurement equipment.
SUBSTANCE: method is realised by compensation of a parasitic mismatch signal with a third feedback circuit, where the signal arises due to low-frequency process in phase modulators of an integral-optical circuit (IOC) and results in instability of a zero signal, and also due to increased stability of scale ratio of the fibre-optic gyroscope due to more accurate setting of amplitude of the stepped serrated voltage, compensating for difference of Sagnac phases as it is supplied to phase modulators of IOC.
EFFECT: increased accuracy of a fibre-optic gyroscope containing two feedback circuits.
2 cl, 14 dwg
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