Ultra-sensitive strain sensor based on Sagnac interferometer with different length panda fiber

Gao, Ling; Jiang, Chao; Hu, Chuanju; Guo, Zihao; Han, Bowen; Guo, Xiaoshan; Sun, Simei

doi:10.1016/j.infrared.2024.105445

Infrared Physics & Technology

2024

DOI: 10.1016/j.infrared.2024.105445

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Ultra-sensitive strain sensor based on Sagnac interferometer with different length panda fiber

Ling Gao,

Chao Jiang,

Chuanju Hu

et al.

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

Huang,

Gao,

Chao

et al. 2024

Advanced Sensor Systems and Applications XIV

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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.

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

Huang,

Gao,

Chao

et al. 2024

Advanced Sensor Systems and Applications XIV

View full text Add to dashboard Cite

show abstract

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Ultra-sensitive strain sensor based on Sagnac interferometer with different length panda fiber

Cited by 1 publication

References 35 publications

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

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

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