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Strain sensor based on gourd-shaped single-mode-multimode-single-mode hybrid optical fibre structure
Date
2017
Abstract
A fibre-optic strain sensor based on a gourd-shaped joint multimode fibre (MMF) sandwiched between two single-mode fibres (SMFs) is described both theoretically and experimentally. The cladding layers of the two MMFs are reshaped to form a hemisphere using an electrical arc method and spliced together, yielding the required gourd shape. The gourd-shaped section forms a Fabry-Perot cavity between the ends of two adjacent but non-contacting multimode fibres' core. The effectiveness of the multimode interference based on the Fabry-Perot interferometer (FPI) formed within the multimode inter-fibre section is greatly improved resulting in an experimentally determined strain sensitivity of -2.60 pm/mu epsilon over the range 0-1000 mu epsilon. The sensing characteristics for temperature and humidity of this optical fibre strain sensor are also investigated. (C) 2017 Optical Society of America
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Description
peer-reviewed
Publisher
Optical Society of America
Citation
Optics Express;25 (16), 18885-
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Lewis_2016_strain.pdf
Adobe PDF, 3.11 MB
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Funding Information
Ministry of Science and Technology China, National Natural Science Foundation of China, Department of Science & Technology of Heilongjiang Province, Ministry of Education China