Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Compact Strain Sensor Based on Microstructural Fabry-Perot Fiber Cavity

Version 1 : Received: 27 August 2021 / Approved: 30 August 2021 / Online: 30 August 2021 (16:31:35 CEST)

How to cite: Guo, Z.; Wang, Y.; Li, J. A Compact Strain Sensor Based on Microstructural Fabry-Perot Fiber Cavity. Preprints 2021, 2021080553 (doi: 10.20944/preprints202108.0553.v1). Guo, Z.; Wang, Y.; Li, J. A Compact Strain Sensor Based on Microstructural Fabry-Perot Fiber Cavity. Preprints 2021, 2021080553 (doi: 10.20944/preprints202108.0553.v1).

Abstract

Fabry-Perot air chamber was constructed at the melting point (splicing location) of two single-mode fibers by glycerin assisted self-expansion method. The morphology of the Fabry-Perot air chamber was fabricated and optimized by modulating the splicing parameters (drawing process, discharging location, time and intensity) and the fibers’ end-face (plane or arc). The in-line or reflected Fabry-Perot cavities have been applied to determine the tensile strain in the range of 0-1.2 N. The train sensing performance of the spherical shaped FP cavity has been experimentally demonstrated with the best sensitivity of 3.628 nm/N, corresponding to the resolution of ~0.005 N. The proposed FP fiber sensor has the advantages of low cost, fast fabrication and easy-integration with the common fiber system.

Keywords

optical fiber sensor; Fabry-Perot interferometer; strain sensor

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