METHOD OF INCREASING STABILITY OF SCALE FACTOR OF FIBER OPTIC GYROSCOPE Russian patent published in 2018 - IPC G01C19/72 

FIELD: fiber optics.

SUBSTANCE: invention relates to the field of fiber optics and relates to a method for improving the stability of the scale factor of a fiber optic gyroscope. Gyroscope includes an integrated optical phase modulator, a photodetector, a photodetector current amplifier, analog-to-digital converters, a programmable logic integrated circuit and an operational amplifier. For the linearization of the output characteristic, ensuring the stability of the scale factor, and compensating the DC component of the signal at the output of the photodetector current amplifier, three feedback loops are organized on the basis of three demodulators. To eliminate the false mismatch signal, a fourth feedback loop is used based on the fourth demodulator and the first additional low-efficiency phase modulator, to which a special shape voltage is applied to compensate for the phase difference distortion of the optical beams of the auxiliary phase modulation introduced by the main phase modulator. In this case, with the help of the regulator, the voltage amplitude of the special shape is changed on the electrodes of the first additional modulator in order to reset the signal at the output of the fourth demodulator.

EFFECT: technical result consists in increasing the stability of the scale factor of the gyroscope.

1 cl, 18 dwg