28 August 2015 Polarization-based optical fiber sensor of steel corrosion
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Metal-coated D-shape optical fiber is serving as a polarizer by using its attenuation difference for two orthogonal fundamental modes. This paper presents a novel corrosion sensor, based on an iron-coated optical fiber polarizer. The sensor is fabricated by sputtering a Fe-C film on a side-polished single mode fiber. The extinction ratio and the optical power loss are varying during the corrosion process when the iron-coated sensor is exposed to a corrosive environment. The proposed sensor provides a new approach for monitoring the early-age corrosion of steel structures by tracing the variation of polarization characteristics.
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Wenbin Hu, Cheng Zhu, Xing Zheng, Min Gao, Donglai Guo, Wei Chen, "Polarization-based optical fiber sensor of steel corrosion", Proc. SPIE 9555, Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications, 955510 (28 August 2015); doi: 10.1117/12.2186056; https://doi.org/10.1117/12.2186056

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