Bending fiber sensor based on capillary hollow-core fiber

Luis A. Herrera-Piad; Iván Hernández-Romano; Daniel A. May-Arrioja; Vladimir P. Minkovich; Miguel Torres-Cisneros; Felipe de J. Velázquez-González; Oscar A. Durán-Pérez

doi:10.1117/12.2665046

31 May 2023 Bending fiber sensor based on capillary hollow-core fiber

Luis A. Herrera-Piad, Iván Hernández-Romano, Daniel A. May-Arrioja, Vladimir P. Minkovich, Miguel Torres-Cisneros, Felipe de J. Velázquez-González, Oscar A. Durán-Pérez

Author Affiliations +

Proceedings Volume 12572, Optical Sensors 2023; 125720W (2023) https://doi.org/10.1117/12.2665046
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

This investigation proposes and experimentally validates a method to increase the sensitivity of a bending fiber optic sensor based on anti-resonant reflecting optical waveguide (ARROW) guidance. The sensing device is fabricated by splicing a small piece of capillary hollow-core fiber (CHCF) between two single-mode fibers (SMF), then, this structure is placed on a steel sheet to measure different curvature values. The sensor by itself shows a low curvature sensitivity in a curvature small range. However, if half of the CHCF length is covered with polydimethylsiloxane (PDMS), the curvature sensitivity increases, even in a bigger curvature range. Furthermore, the coated device reveals a really small temperature sensitivity, proving that temperature variations do not have an influence on the bending fiber optic sensor operation. The ARROW sensor created with this method is cost-effective and can be used for real sensing applications like structural health monitoring.

Conference Presentation

Citation Download Citation

Luis A. Herrera-Piad, Iván Hernández-Romano, Daniel A. May-Arrioja, Vladimir P. Minkovich, Miguel Torres-Cisneros, Felipe de J. Velázquez-González, and Oscar A. Durán-Pérez "Bending fiber sensor based on capillary hollow-core fiber", Proc. SPIE 12572, Optical Sensors 2023, 125720W (31 May 2023); https://doi.org/10.1117/12.2665046

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