Research on the influence of spike pulse in interferometric integrated optical gyroscope

Wenlong Zuo; Chao Song; Zheng Yang

doi:10.1117/12.3008056

18 December 2023 Research on the influence of spike pulse in interferometric integrated optical gyroscope

Wenlong Zuo, Chao Song, Zheng Yang

Proceedings Volume 12968, AOPC 2023: Optic Fiber Gyro ; 129681X (2023) https://doi.org/10.1117/12.3008056
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Interferometric integrated optic gyroscope usually applies a square wave phase modulation signal, namely two state modulation or four state modulation, between two back-propagation light waves. The amplitude of square wave phase modulation is π/2, and the modulation frequency is the intrinsic frequency of the sensitive loop. Based on this unique demodulation method, it is inevitable to generate a spike pulse signal at the output signal end of the detector. This spike pulse signal can cause transient saturation in the front or rear amplifier of the detector, and signal distortion will occur when the detector recovers from this overload state; The asymmetry of peak pulses can generate odd harmonic interference coupled into useful signals, resulting in errors during demodulation and increasing the output noise of the gyroscope. Therefore, it is necessary to process the spike pulse. This article theoretically analyzes the reasons for the output noise of the gyroscope caused by spike pulses, and adopts a method to avoid the impact of spike pulses. Simulation shows that this method not only eliminates spike pulses, but also eliminates odd harmonic interference induced by spike pulses. The experimental comparison shows that this method significantly improves the accuracy of the gyroscope.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wenlong Zuo, Chao Song, and Zheng Yang "Research on the influence of spike pulse in interferometric integrated optical gyroscope", Proc. SPIE 12968, AOPC 2023: Optic Fiber Gyro , 129681X (18 December 2023); https://doi.org/10.1117/12.3008056

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