All fiber-optics disk accelerometers with wide frequency response based on weak FBG array

Bingqin Chen; Yutang Dai; Jianguan Tang

doi:10.1117/12.2687413

27 November 2023 All fiber-optics disk accelerometers with wide frequency response based on weak FBG array

Bingqin Chen, Yutang Dai, Jianguan Tang

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 127711K (2023) https://doi.org/10.1117/12.2687413
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

This paper designs an all fiber-optics disc accelerometer, which uses an online prepared weak fiber Bragg grating (WFBG) array to form a matching interferometer. By utilizing the linear relationship between acceleration and adjacent grating phase changes, 3 × 3 demodulation technology is used to demodulate the phase signal. Through finite element simulation, theoretical analysis is applied on sensitivity and resonance frequency of the accelerometer. Through the tests on vibration exciter, the frequency response range of the sensor array can reach 5Hz-1kHz. The experimental results confirm that the accelerometer features a wide frequency response and excellent linearity.

Citation Download Citation

Bingqin Chen, Yutang Dai, and Jianguan Tang "All fiber-optics disk accelerometers with wide frequency response based on weak FBG array", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 127711K (27 November 2023); https://doi.org/10.1117/12.2687413

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