OTDR signature of polymer optical fiber for deformation monitoring
Hu W. Zhou J. Liang S. Tosi D. Yang M.
1 September 2025Elsevier B.V.
Measurement: Journal of the International Measurement Confederation
2025#253
Polymer optical fiber (POF) based Optical time-domain reflectometry (OTDR)has shown great potential for structure health monitoring (SHM) on severe deformation. To improve the recognition ability of POF-based OTDR and extract the info mated deformation from the OTDR trace, three main deformation events are focused to extract the typical signatures of OTDR trace. The bending with full/half/quarter turn, axial tension and lateral stress are theoretically and experimentally investigated. Based on the repeatable measured results of each form, a mapping method of loss versus peak is proposed by visualizing deformation form and severity into one frame. Deformation Severity Indicator along axes act a functional identifier of quasi-quantitative evaluation of the deformation status. This mapping method and indicator will effectively improve the accuracy and feasibility of the POF-assisted SHM technology for field applications.
Large deformation monitoring , OTDR , Polymer optical fiber
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National Engineering Research Center for Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Luoshi Road No.122, Wuhan, 430070, China
School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road No.122, Wuhan, 430070, China
School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr, Astana, 010000, Kazakhstan
National Engineering Research Center for Fiber Optic Sensing Technology and Networks
School of Materials Science and Engineering
School of Engineering and Digital Sciences
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