Sensitivity-enhanced all-fiber displacement sensor based on Lyot filter

Rong Tian; Haiwei Zhang; Yao Feng; Qi Lu; Zhihong Chen; Lifang Xue; Pengbo Jiang; Wei Shi; Jianquan Yao

doi:10.1117/12.2641617

19 December 2022 Sensitivity-enhanced all-fiber displacement sensor based on Lyot filter

Rong Tian, Haiwei Zhang, Yao Feng, Qi Lu, Zhihong Chen, Lifang Xue, Pengbo Jiang, Wei Shi, Jianquan Yao

Proceedings Volume 12321, Advanced Sensor Systems and Applications XII; 123210T (2022) https://doi.org/10.1117/12.2641617
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

An all-fiber optic high-sensitivity displacement sensor based on 45°-spliced PM Lyot filter is proposed and its sensing performance is investigated experimentally. According to the relationships between the dips and the displacements, the sensor has a good linearity in passive mode, whose R square is larger than 0.998, and the highest sensitivity of 132.55 pm/μm is obtained in the range of 200 μm displacement variation. Moreover, it can be compatible to an intracavity displacement sensing system, achieving narrow linewidth, high signal-to-noise ratio (SNR), and high resolution. It can be found that the sensitivity of the intracavity displacement sensor can be 60 pm/μm when the PMF fiber length is about 20 cm with a linewidth narrower than 0.05 nm and a SNR higher than 55 dB.

Conference Presentation

Citation Download Citation

Rong Tian, Haiwei Zhang, Yao Feng, Qi Lu, Zhihong Chen, Lifang Xue, Pengbo Jiang, Wei Shi, and Jianquan Yao "Sensitivity-enhanced all-fiber displacement sensor based on Lyot filter", Proc. SPIE 12321, Advanced Sensor Systems and Applications XII, 123210T (19 December 2022); https://doi.org/10.1117/12.2641617

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