Sánchez González, ArturoLeandro González, DanielShi, MuyuZhu, MengshiMurayama, Hideaki2024-11-252024-11-252024-06-21Sanchez-Gonzalez, A., Leandro, D., Shi, M., Zhu, M., Murayama, H. (2024). Quasi-distributed 3-cm vibration and strain monitoring using OFDR and in-line interferometers. Journal of Lightwave Technology, 42(18), 6608-6615. https://doi.org/10.1109/JLT.2024.3417273.0733-872410.1109/JLT.2024.3417273https://academica-e.unavarra.es/handle/2454/52580Fecha de publicación: 2024-06-21This study presents a new quasi-distributed vibration sensing approach with a 3-cm spatial resolution, capable of performing multiparameter measurements. In-line interferometers are employed simultaneously as strain point sensors and reflectors for vibration monitoring due to the Doppler effect. The interferometers consist of capillary fiber segments spliced between single-mode fibers, forming a sensing etalon. A study of the characteristics required for the fiber array fabrication is carried out. A 60 cm array comprising 20 sensing sections is used for the proof-of-concept of the technique for strain and vibration sensing. An analysis of the behavior for static strain and vibrations is performed, both individually and simultaneously, using a free-end cantilever experiment.application/pdfeng© 2024 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License.DeformationDopplerFast fourier transformHollow core fiberInterferometerOptical fiber sensorReflectanceinfo:eu-repo/semantics/article2024-11-25info:eu-repo/semantics/openAccess