Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending, and magnetic field
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”. MZI<sub>1</sub> and MZI<sub>2</sub> are prepared by pulling DCF to different lengths using a fiber optic fusion tapering machine respectively. MZI<sub>1</sub> with tapered structure is quite sensitive to axial strain, and the experimentally obtained axial strain sensitivity is -21.6 pm/με. Then, sticking MZI<sub>1</sub> 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 MZI<sub>1</sub> spectrum and magnetic field intensity, with a fitting coefficient of 0.9997. The curvature of the bending was measured using MZI<sub>2</sub>, achieving a sensitivity of 10.1 nm/m<sup>-1</sup> and a linearity of 0.9906.
Authors
- Zihao Guo (ORCID: https://orcid.org/0000-0001-7948-2919)
- Tianqi Yan (ORCID: https://orcid.org/0009-0001-6264-3111)
- Simei Sun (ORCID: https://orcid.org/0000-0002-5028-6276)
- Chao Jiang (ORCID: https://orcid.org/0000-0003-4079-6990)
- Huiling Huang (ORCID: https://orcid.org/0000-0002-0710-1993)
- Ling Gao (ORCID: https://orcid.org/0000-0002-3171-591X)
- Han Zhang (ORCID: https://orcid.org/0000-0002-0166-1973)
- Bowen Han (ORCID: https://orcid.org/0000-0002-8169-8150)
- Xiaoshan Guo
Institutions
- Hubei Normal University (CN)
Publication Details
- Published
- 2024-10-11
- DOI
- https://doi.org/10.1117/12.3036090
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00