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27 November 2023 Highly sensitive fiber-optic acoustic sensor utilizing a hollow cantilever
Shen Tian, Yingying Qiao, Mu Liang, Mingyang Feng, Yang Gao, Lei Li, Chongxin Shan
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Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 1277118 (2023) https://doi.org/10.1117/12.2686475
Event: SPIE/COS Photonics Asia, 2023, Beijing, China
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Abstract
Sensitivity optimization in acoustic sensors necessitates the development of acoustic-sensitive elements. Among various designs, the cantilever structure has emerged as a highly sensitive choice. In this study, we introduce a novel Fabry-Perot (F-P) interferometric fiber-optic acoustic sensor (FOAS) that integrates a hollow cantilever structure. The proposed structure enhances vibration flexibility by reducing both the effective mass and spring constant of the cantilever. Experimental results demonstrate that the proposed structure outperforms the original design in terms of sensitivity. Notably, at 1.7 kHz, the sensitivity and minimum detectable acoustic pressure level (MDP) reach 91.4 mV/Pa and 6.2 µPa/√ Hz, respectively. The proposed hollow cantilever establishes an optimization framework for highly sensitive acoustic sensors.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Shen Tian, Yingying Qiao, Mu Liang, Mingyang Feng, Yang Gao, Lei Li, and Chongxin Shan "Highly sensitive fiber-optic acoustic sensor utilizing a hollow cantilever", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 1277118 (27 November 2023); https://doi.org/10.1117/12.2686475
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KEYWORDS
Acoustics
Fiber optics sensors
Sensors
Fabry–Perot interferometry
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