A study on the improvement of sensitivity consistency in Sagnac photoacoustic sensing system

Ruixi Tang; Xinyu Zheng; Qianqian Zhang; Jiang Wang; Ning Wang; Jie Zhang; Jianjun Chen; Yong Zhu

doi:10.1117/12.2687229

28 November 2023 A study on the improvement of sensitivity consistency in Sagnac photoacoustic sensing system

Ruixi Tang, Xinyu Zheng, Qianqian Zhang, Jiang Wang, Ning Wang, Jie Zhang, Jianjun Chen, Yong Zhu

Proceedings Volume 12772, Real-time Photonic Measurements, Data Management, and Processing VII; 1277208 (2023) https://doi.org/10.1117/12.2687229
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Fiber optic acoustic sensing system based on Sagnac interference is widely used in the field of perimeter security. However, the sensitivity of acoustic response varies drastically with frequency, which has become a bottleneck limiting the development of Sagnac photoacoustic sensing technology. An elastic structure is proposed to improve the sensitivity consistency of the photoacoustic sensing system based on Sagnac interference at different frequencies. The elastic structure of optical fiber pickup was optimized by finite element analysis, Solidworks and Comsol. Simulation results show that the designed titanium alloy-based elastomeric structure with a diameter of 110 mm, a height of 100 mm, and an elastomer wall thickness of 3 mm has significantly improved the consistency of the sensitivity of the acoustic response at different frequencies. This work provides a possibility for the application scenario expansion of photoacoustic sensing system based on Sagnac interference.

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

Citation Download Citation

Ruixi Tang, Xinyu Zheng, Qianqian Zhang, Jiang Wang, Ning Wang, Jie Zhang, Jianjun Chen, and Yong Zhu "A study on the improvement of sensitivity consistency in Sagnac photoacoustic sensing system", Proc. SPIE 12772, Real-time Photonic Measurements, Data Management, and Processing VII, 1277208 (28 November 2023); https://doi.org/10.1117/12.2687229

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