Large-Dynamic-Range and High-Stability Phase Demodulation Technology for Fiber-Optic Michelson Interferometric Sensors.

Wanjin Zhang, Ping Lu, Zhiyuan Qu, Jiangshan Zhang, Qiang Wu, Deming Liu

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Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Wanjin ZhangWuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

Ping LuWuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.ORCID 0000-0001-8431-1444

Zhiyuan QuWuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

Jiangshan ZhangDepartment of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

Qiang WuFaculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK.ORCID 0000-0002-2901-7434

Deming LiuWuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.

Funding

National Natural Science Foundation of China 61775070NSFC-RS Exchange Programme 62111530153Science, Technology and Innovation Commission of Shenzhen Municipality 2021Szvup089the Royal Society International Exchanges 2020 Cost Share (NSFC) of United Kingdom IEC\NSFC\201015

6 · The paper itself

Abstract

A large-dynamic-range and high-stability phase demodulation technology for fiber-optic Michelson interferometric sensors is proposed. This technology utilizes two output signals from a 2 × 2 fiber-optic coupler, the interferometric phase difference of which is π. A linear-fitting trigonometric-identity-transformation differential cross-multiplication (LF-TIT-DCM) algorithm is used to interrogate the phase signal from the two output signals from the coupler. The interferometric phase differences from the two output signals from the 2 × 2 fiber-optic couplers with different coupling ratios are all equal to π, which ensures that the LF-TIT-DCM algorithm can be applied perfectly. A fiber-optic Michelson interferometric acoustic sensor is fabricated, and an acoustic signal testing system is built to prove the proposed phase demodulation technology. Experimental results show that excellent linearity is observed from 0.033 rad to 3.2 rad. Moreover, the influence of laser wavelength and optical power is researched, and variation below 0.47 dB is observed at different sound pressure levels (SPLs). Long-term stability over thirty minutes is tested, and fluctuation is less than 0.36 dB. The proposed phase demodulation technology obtains large dynamic range and high stability at rather low cost.

Indexed as

2 × 2 coupleracoustic sensorcoupling ratiofiber-optic Michelson interferometric sensorphase demodulation

Identifiers

PMID35408103

DOI10.3390/s22072488

PMCPMC9002562

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