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Open AccessCommunication

Swelling-Based Distributed Chemical Sensing with Standard Acrylate Coated Optical Fibers

1
NanoPRO START S.R.L., Oltenitei, No. 388, District 4, 041337 Bucharest, Romania
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Department of Electronic Engineering, Universidad Técnica Federico Santa María, 2390123 Valparaíso, Chile
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Center for Surface Science and Nanotechnology (CSSNT), University Politehnica Bucharest, 060042 Bucharest, Romania
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Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Sensors 2021, 21(3), 718; https://doi.org/10.3390/s21030718
Received: 5 January 2021 / Revised: 16 January 2021 / Accepted: 18 January 2021 / Published: 21 January 2021
(This article belongs to the Section Optical Sensors)
Distributed chemical sensing is demonstrated using standard acrylate coated optical fibers. Swelling of the polymer coating induces strain in the fiber’s silica core provoking a local refractive index change which is detectable all along an optical fiber by advanced distributed sensing techniques. Thermal effects can be discriminated from strain using uncoated fiber segments, leading to more accurate strain readings. The concept has been validated by measuring strain responses of various aqueous and organic solvents and different chain length alkanes and blends thereof. Although demonstrated on a short range of two meters using optical frequency-domain reflectometry, the technique can be applied to many kilometer-long fiber installations. Low-cost and insensitive to corrosion and electromagnetic radiation, along with the possibility to interrogate thousands of independent measurement points along a single optical fiber, this novel technique is likely to find applications in environmental monitoring, food analysis, agriculture, water quality monitoring, or medical diagnostics. View Full-Text
Keywords: fiber optics sensors; distributed optical fiber sensor; optical frequency-domain reflectometry; chemical sensing fiber optics sensors; distributed optical fiber sensor; optical frequency-domain reflectometry; chemical sensing
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MDPI and ACS Style

Sedighi, S.; Soto, M.A.; Jderu, A.; Dorobantu, D.; Enachescu, M.; Ziegler, D. Swelling-Based Distributed Chemical Sensing with Standard Acrylate Coated Optical Fibers. Sensors 2021, 21, 718. https://doi.org/10.3390/s21030718

AMA Style

Sedighi S, Soto MA, Jderu A, Dorobantu D, Enachescu M, Ziegler D. Swelling-Based Distributed Chemical Sensing with Standard Acrylate Coated Optical Fibers. Sensors. 2021; 21(3):718. https://doi.org/10.3390/s21030718

Chicago/Turabian Style

Sedighi, Sina; Soto, Marcelo A.; Jderu, Alin; Dorobantu, Dorel; Enachescu, Marius; Ziegler, Dominik. 2021. "Swelling-Based Distributed Chemical Sensing with Standard Acrylate Coated Optical Fibers" Sensors 21, no. 3: 718. https://doi.org/10.3390/s21030718

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