Experimental validation shows 29.7-fold reduction in modulation depth deviation in fiber-optic gyroscopes, indicating improved stability under temperature variations.
Temperature variations cause drifts in modulation depth, degrading the stability of interferometric fiber-optic gyroscopes. A symmetric extended square-wave modulation method with real-time feedback is proposed to suppress this effect. Compared with the conventional modulation method, experimental validation under varying thermal conditions demonstrates a 29.7-fold reduction in the deviation of modulation depth, a 2.1-fold improvement in bias instability, and a twofold extension in minimum stable time, confirming that the proposed method can suppress the effect of temperature variations on the stability of interferometric fiber-optic gyroscopes.
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Cao et al. (2025) studied this question.
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