Optimized resonator fiber gyroscope having an input beam modulated with high sensitivity and low bias

摘要

PROBLEM TO BE SOLVED: To provide a resonator optical gyroscope having input beam modulation optimized for high sensitivity and low bias.;SOLUTION: Systems and methods for optimizing input beam modulation for high gyro sensitivity and low bias errors. The present invention is a resonator optical gyroscope having an optimized phase-modulation amplitude (frequency) for a selected modulation frequency (amplitude) that maximizes the gyro signal-to-noise (S/N) sensitivity. For selected values of the phase modulation amplitude, intensity modulation induced by polarization cross-coupling can be nulled. By setting the phase modulation amplitudes substantially close to these nulling points (e.g. M=3.832 or 7.016 radians, which causes the first order Bessel function to be zero that is, J₁(M)=0) and then by optimizing the modulation frequency, the intensity modulation induced bias is reduced to zero and gyro S/N sensitivity is maximized.;COPYRIGHT: (C)2011,JPO&INPIT