A high-resolution random fiber laser static strain sensor

Peide Liu; Zhichen Hu; Lijie Yang; Yi Zheng

doi:10.1117/12.2606399

4 January 2022 A high-resolution random fiber laser static strain sensor

Peide Liu, Zhichen Hu, Lijie Yang, Yi Zheng

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 120653Y (2022) https://doi.org/10.1117/12.2606399
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

The paper proposes a high-resolution static strain sensor based on the random fiber laser (RDFL) and the beat frequency method. A π-FBG is used as the sensing element in the RDFL. A narrow-linewidth laser source is frequency-locked to a reference π-FBG by the Pound-Drever-Hall (PDH) technique. The RDFL beats frequency with the frequency-locked laser to achieve a narrower-linewidth beat frequency signal. The 3 dB linewidth and the frequency shift of the beat requency signal are respectively 380 Hz and 27.2 kHz. By tracing the frequency shift of the beat frequency signal, a static strain resolution of 0.18 nε level is achieved.

Citation Download Citation

Peide Liu, Zhichen Hu, Lijie Yang, and Yi Zheng "A high-resolution random fiber laser static strain sensor", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 120653Y (4 January 2022); https://doi.org/10.1117/12.2606399

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