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24 January 2019 Study on long period fiber grating sensor based on deep-grooved process
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Abstract
A high-sensitivity strain sensor of LPFG based on deep-grooved process was investigated. The LPFG was fabricated by a high frequency focused CO2 laser irradiation system in ways of periodic spaced heating on the ordinary single-mode fiber. Combined with a high precision position controller and optical measurement platform, an optical fiber strain sensor measurement platform was established. A theoretical analysis based on coupled mode theory and transmission matrix method for parameter design and optimization of LPFGs was adopted. Experimental results demonstrated that the axial strain sensitivity of a LPFG strain sensor would be increased with the increase of groove depth of the grating, and such a deep-grooved LPFG strain sensor would have an axial strain sensitivity up to -10.28pm/με which should be much larger than the strain sensor without grooves on one side of fiber grating. Therefore, this novel sensor should be able to find a potential value in the field of sensor applications.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yang Cao, Min Zhou, Yu Liu, Yongle Lu, and Xuemei Cai "Study on long period fiber grating sensor based on deep-grooved process ", Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 108401D (24 January 2019); https://doi.org/10.1117/12.2506339
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