Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending, and magnetic field

Huiling Huang; Ling Gao; Chao Jiang; Han Zhang; Tianqi Yan; Zihao Guo; Bowen Han; Xiaoshan Guo; Simei Sun

doi:10.1117/12.3036090

20 November 2024 Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending, and magnetic field

Huiling Huang, Ling Gao, Chao Jiang, Han Zhang, Tianqi Yan, Zihao Guo, Bowen Han, Xiaoshan Guo, Simei Sun

Author Affiliations +

Proceedings Volume 13243, Advanced Sensor Systems and Applications XIV; 1324310 (2024) https://doi.org/10.1117/12.3036090
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

A fiber optic Mach-Zehnder interferometer (MZI) sensor with sensitivity to strain, magnetic field, and bending was designed by splicing single-mode fiber (SMF) and dispersion compensation fiber (DCF). MZI is a sandwich structure of “SMF - tapered DCF - SMF”. MZI₁ and MZI₂ are prepared by pulling DCF to different lengths using a fiber optic fusion tapering machine respectively. MZI₁ with tapered structure is quite sensitive to axial strain, and the experimentally obtained axial strain sensitivity is -21.6 pm/με. Then, sticking MZI₁ and magnetostrictive material together can form a magnetic field sensor. The experiment found that within the range of 15 mT to 140 mT, there is an excellent parabolic fitting relationship between the dip wavelength of MZI₁ spectrum and magnetic field intensity, with a fitting coefficient of 0.9997. The curvature of the bending was measured using MZI₂, achieving a sensitivity of 10.1 nm/m^-1 and a linearity of 0.9906.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Huiling Huang, Ling Gao, Chao Jiang, Han Zhang, Tianqi Yan, Zihao Guo, Bowen Han, Xiaoshan Guo, and Simei Sun "Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending, and magnetic field", Proc. SPIE 13243, Advanced Sensor Systems and Applications XIV, 1324310 (20 November 2024); https://doi.org/10.1117/12.3036090

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