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Open AccessArticle

High Rate Dynamic Monitoring with Fabry–Perot Interferometric Sensors: An Alternative Interrogation Technique Targeting Biomedical Applications

1
Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
2
Department of Physics & I3N, University of Aveiro, 3810-193 Aveiro, Portugal
3
Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(21), 4744; https://doi.org/10.3390/s19214744
Received: 2 October 2019 / Revised: 28 October 2019 / Accepted: 30 October 2019 / Published: 31 October 2019
(This article belongs to the Special Issue Optical Fiber Sensors for Biomedical Applications)
Fabry–Perot interferometric (FPI) sensors are an accurate and well-established sensing technology that are used to monitor a wide range of parameters such as strain, temperature, and refractive index, among many others. Nevertheless, due to the limited number and high cost of existing interrogation techniques for FPIs, its use is often restricted to discrete measurements, not being so explored for dynamic applications. The development of an alternative interrogation technique for a high rate of acquisition may propel this type of sensor into less explored fields such as dynamic biomedical applications. In this work, we present the theoretical and experimental analyses of an FPI sensing architecture by using an alternative high rate dynamic acquisition methodology, based on frequency to amplitude conversion, where the FPI spectral shift is detuned by the convolution of the optical light source with the FPI interference pattern. The good agreement between the theoretical and experimental results verified the reliability of the proposed methodology. Moreover, preliminary results show that the developed sensing architecture can be a suitable solution to monitor biomedical parameters such as the carotid pulse wave. View Full-Text
Keywords: optical fiber; Fabry–Perot interferometric sensors; high rate interrogation architecture; biomedical applications optical fiber; Fabry–Perot interferometric sensors; high rate interrogation architecture; biomedical applications
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MDPI and ACS Style

Domingues, M.F.; Tavares, C.; Alberto, N.; Radwan, A.; André, P.; Antunes, P. High Rate Dynamic Monitoring with Fabry–Perot Interferometric Sensors: An Alternative Interrogation Technique Targeting Biomedical Applications. Sensors 2019, 19, 4744. https://doi.org/10.3390/s19214744

AMA Style

Domingues MF, Tavares C, Alberto N, Radwan A, André P, Antunes P. High Rate Dynamic Monitoring with Fabry–Perot Interferometric Sensors: An Alternative Interrogation Technique Targeting Biomedical Applications. Sensors. 2019; 19(21):4744. https://doi.org/10.3390/s19214744

Chicago/Turabian Style

Domingues, M. F.; Tavares, Cátia; Alberto, Nélia; Radwan, Ayman; André, Paulo; Antunes, Paulo. 2019. "High Rate Dynamic Monitoring with Fabry–Perot Interferometric Sensors: An Alternative Interrogation Technique Targeting Biomedical Applications" Sensors 19, no. 21: 4744. https://doi.org/10.3390/s19214744

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