FIELD: methods of phase modulation.
SUBSTANCE: method is based upon applying step sawtooth voltage to wideband phase modulator. Sawtooth voltage is specified with of numbers of m, n and k. Duration of each step equals to path time of light beam along light-guide of sensitive coil of gyro used to perform modulation of phase difference of beams of ringular interferometer. It is presented in form of pulse sequence with period of T0. During first half-period of the sequence the phase difference pulses have like number of alternating pulses with amplitudes of -(π-Δ) radians and +(π+Δ) radians. During second half-period the pulses have like number of alternating pulses with amplitudes of -(π+Δ) and +(π-Δ) radians correspondingly. Values of m and n are chosen from set of any positive integer non-zero numbers. Value of Δ is chosen within range of values from 0,05π radians≤ Δ ≤0,95π radians.
EFFECT: improved sensitivity of fiber-optic gyro; improved stability of scale factor.
5 dwg
