Sánchez González, ArturoPradas Martínez, JavierCorera Orzanco, ÍñigoBravo Acha, MikelLeandro González, DanielDauliat, RomainJamier, RaphaelRoy, PhilippePérez Herrera, Rosa AnaLópez-Amo Sáinz, Manuel2023-11-162023-11-162023Sanchez-Gonzalez, A., Pradas, J., Corera, I., Bravo, M., Leandro, D., Dauliat, R., Jamier, R., Roy, P., Perez-Herrera, R. A., Lopez-Amo, M. (2023) Multicore fiber sensors for strain measurement towards traffic monitoring. En Wuilpart, M., Caucheteur C. (Eds.), European Workshop on Optical Fibre Sensors (EWOFS 2023) (pp. 73-76). SPIE. https://doi.org/10.1117/12.2678405.978-1-5106-6500-210.1117/12.2678405https://academica-e.unavarra.es/handle/2454/46783In this work, two new interferometric sensors based on multicore optical fibers for the measurement of strain with the ultimate goal of traffic monitoring are presented. The operating principle of each sensor relied on the monitoring of the phase shift difference accumulated between the supermodes of the structure of the multicore segment in a full round trip. The strain characterization for both sensors resulted in a linear response, with sensitivities of -4.073·10-3 rad/με and - 4.389·10-3 rad/με for the aligned and V-shaped cases respectively, and one-hour instabilities below 4.6·10-3 rad with a 95% confidence level. These results suggest its feasibility in applications requiring high sensitivities over very wide strain ranges, such as heavy-vehicle traffic monitoring. To corroborate the hypothesis, both sensors were integrated into the pavement and their response to the traffic was analyzed.application/pdfengCopyright 2023 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited.Fast Fourier TransformFew-mode fiberFiber sensorMulticore fiberTraffic monitoringinfo:eu-repo/semantics/conferenceObject2023-11-16info:eu-repo/semantics/openAccess