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

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2 Author(s)
Chien, Pie‐Yau ; Inst. of Electr-Opt. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan ; Ci-Ling Pan

A new approach to an open-loop, all-fiber gyroscope with a 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 by as much as 15%. The basic principle of the technique and experimental results are reported.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:3 ,  Issue: 3 )