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Open AccessArticle

Gasoline Quality Sensor Based on Tilted Fiber Bragg Gratings

Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, Unicamp, Campinas 13083-859, Brazil
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Photonics 2019, 6(2), 51; https://doi.org/10.3390/photonics6020051
Received: 27 April 2019 / Revised: 12 May 2019 / Accepted: 13 May 2019 / Published: 14 May 2019
We report on the study of an intensity-based optical fiber sensor for gasoline quality monitoring. The sensor setup employs two Bragg gratings with different spectral responses to interrogate the optical response of a tilted Bragg grating. The sensor operation is based on the tilted Bragg grating sensitivity to external refractive index changes, which are translated as power variations by the interrogation scheme. Gasoline–ethanol solutions with concentrations ranging from 0% to 60% ethanol were used to demonstrate the sensor performance. The results allowed to estimate that the sensor is able, within its resolution limit, to detect ethanol concentration variations of 1.5% in gasoline–ethanol solutions and discriminate temperature variations of 0.5 °C. The all-optical sensor setup is compact and robust, making it a competitive alternative for the realization of fuel quality analyses in practical applications. View Full-Text
Keywords: fiber optics; fiber optics sensors; fiber Bragg gratings; tilted fiber Bragg gratings fiber optics; fiber optics sensors; fiber Bragg gratings; tilted fiber Bragg gratings
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MDPI and ACS Style

Aristilde, S.; Cordeiro, C.M.B.; Osório, J.H. Gasoline Quality Sensor Based on Tilted Fiber Bragg Gratings. Photonics 2019, 6, 51.

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