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A long-period fiber grating sensor based on a core-cladding misalignment structure
Date
2022
Abstract
In this article, a novel long-period fiber grating (LPFG) sensor based on a core-cladding misalignment structure is described. The LPFG consists of multiple short-length singlemode fiber (SMF) segments joined with core-cladding misalignment splicing. Due to the refractive index (RI) difference between the core and the cladding, periodic RI modulation along fiber axis is achieved. The resonance wavelength responses of the core-cladding misalignment structure based LPFG to RI, strain and temperature are investigated experimentally, and a maximum RI sensitivity of 992.8 nm/RIU, a strain sensitivity of -7.4 pm/με, and a temperature sensitivity of -31 pm/o C are obtained, respectively. Such a core-cladding misalignment structure provides a low-cost fabrication route for LPFGs while offering high sensitivities, which has potential applications for accurate measurement and sensing in industrial and harsh environments.
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Description
Publisher
IEEE Computer Society
Citation
Journal of Lightwave Technology, 2022, 40 (15), pp. 5316-5321
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Lewis_2022_Long.pdf
Adobe PDF, 17.09 MB
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Funding Information
This work was supported by the National Natural Science Foundation of China (NSFC) (61935006, 62090062); Heilongjiang Provincial Natural Science Foundation of China (LH2020F028); Shenzhen Basic Research Project (JCYJ20190808173619062); 111 Project to the Harbin Engineering University (B13015); Heilongjiang Touyan Innovation Team Program; Science Foundation Ireland under the Centres research program for the MaREI project (SFI/12/RC/2302_P2). The authors thank Dr. Chola Kalale for his contribution to this work.
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Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/4.0/