Deep phase-modulation approach to an open-loop fiber optic gyroscope

Pie-Yau Chien, Ci-Ling Pan
1991 IEEE Photonics Technology Letters  
A new approach to an open-loop, all-fiber gyroscope with wide dynamic range and linear scale factor is described. For signal processing, the Sagnac phase lift is converted into a phase shift in the low-frequency electrical signal by using a deep sinusoidal phase-modulation waveform followed by gate-switching. With the duty cycle of the gating signal selected to be in the range between 20 and 70%, the scale factor is stable with respect to change in the amplitude of the phase modulation signal
more » ... as much as 15%. The basic principle of this technique and experimental results are reported.
doi:10.1109/68.79782 fatcat:cyujy23y7bbx5befzvribz4otu