PSI - Issue 37

Grzegorz Wójcik et al. / Procedia Structural Integrity 37 (2022) 179–186 Grzegorz Wo´ jcik / Structural Integrity Procedia 00 (2022) 000–000

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the quality of end faces influences both the fiber attenuation and the sensor sensitivity. In the range of 1.3326 nD - 1.4177 nD, the highest sensitivity was obtained for the sensors with low-quality end faces after cleaving, although their reproducibility was the lowest. The highest measurement reproducibility was obtained for the sensors, which end-faces were cleaved with the high-end tool. The last experiment had the fabricated sensor and a raw plastic optic fiber cable exposed to extreme climatic conditions. It was found that the temperature change significantly influences the sensor response. The exact source of this is further to be investigated, and potential correlation between the relative humidity inside the climatic chamber and sensor response is to be researched. This research provided results that can be used for further POF sensors development (especially the ones based on light-intensity sensing) and optimizing their reproducibility. 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