Abstract
We use distributed fiber optic strain sensing to examine swelling of the fiber’s polymer coating. The distributed sensing technique that uses unmodified low-cost telecom fibers opens a new dimension of applications that include leak detection, monitoring of water quality, and waste systems. On a short-range length scale, the technology enables “lab-on-a-fiber” applications for food processing, medicine, and biosensing for instance. The chemical sensing is realized with unmodified low-cost telecom optical fibers, namely, by using swelling in the coating material of the fiber to detect specific chemicals. Although generic and able to work in various areas such as environmental monitoring, food analysis, agriculture or security, the proposed chemical sensors can be targeted for water quality monitoring, or medical diagnostics where they present the most groundbreaking nature. Moreover, the technique is without restrictions applicable to longer range installations.
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Acknowledgment
We would like to thank Sina Sedighi and Prof. Marcelo Soto for fruitful discussions and for help with signal processing. This work was financed by the Romanian Ministry of Education and Research (Grant No. 34/01.09.2016, ID: P_37_788, MySMIS: 103364), project co-funded by the European Regional Development Fund through the Competitiveness Operational Program.
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Jderu, A., Dorobantu, D., Ziegler, D. et al. Swelling-Based Chemical Sensing With Unmodified Optical Fibers. Photonic Sens 12, 99–104 (2022). https://doi.org/10.1007/s13320-021-0637-2
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DOI: https://doi.org/10.1007/s13320-021-0637-2