Optical fiber sensor for the vapor phase detection of Trifluoroethanol

Vasilios Sarakatsianos; Georgios Pappas; Eleni Pavlopoulou; Maria Vamvakaki; Stavros Pissadakis

doi:10.1117/12.2678548

23 May 2023 Optical fiber sensor for the vapor phase detection of Trifluoroethanol

Vasilios Sarakatsianos, Georgios Pappas, Eleni Pavlopoulou, Maria Vamvakaki, Stavros Pissadakis

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 126431F (2023) https://doi.org/10.1117/12.2678548
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

A sensing probe is presented for the detection of 2,2,2-trifluoroethanol in the vapor phase, while using poly(vinylidene fluoride (PVDF) thin films, overlaid onto tilted optical fiber Bragg gratings. The 2,2,2-trifluoroethanol sensor operates in the 1.5 μm band, in transmission mode, where the signal of both the core and cladding modes is monitored. Best detectivities obtained are 2 ppm for 2,2,2-trifluoroethanol vapors in ambient atmosphere, for typical response times of 50 min. The sensing probe presented - based on PVDF transductor - shows limited reversibility after being used in the tracing of 2,2,2-trifluoroethanol vapors; its subsequent exposure to nitrogen flow, partly reverses its spectral behavior back to the starting point, denoting the involvement of mechanisms other than physisorption into the underlying transduction. The actual sensing mechanism of 2,2,2-trifluoroethanol vapors while using thin PVDF films is currently under investigation.

Citation Download Citation

Vasilios Sarakatsianos, Georgios Pappas, Eleni Pavlopoulou, Maria Vamvakaki, and Stavros Pissadakis "Optical fiber sensor for the vapor phase detection of Trifluoroethanol", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126431F (23 May 2023); https://doi.org/10.1117/12.2678548

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