Demonstration of improving the sensitivity of a fiber optic temperature sensor using the wavelength of maximum absorption of the lophine

•The lophine absorbance has a dependency as a function of temperature.•The lophine can use any optical source in the wavelength region UV-VIS-NIR.•Lophine absorption spectrum improves the sensitivity of the fiber sensor. In this work, a spectroscopy study of lophine was carried out and the absorptio...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2022-01, Vol.187, p.110378, Article 110378
Main Authors: Pérez-García, G.F., Camas-Anzueto, J.L., Anzueto-Sánchez, G., Pérez-Patricio, M., López-Estrada, F.R.
Format: Article
Language:English
Subjects:
Absorption spectra
Fiber optic temperature sensor
Fiber optics
Lophine
Optical properties
Sensitivity
Sensitivity analysis
Sensors
Temperature
Temperature measurement
Temperature sensors
Thermochromic material
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Summary:•The lophine absorbance has a dependency as a function of temperature.•The lophine can use any optical source in the wavelength region UV-VIS-NIR.•Lophine absorption spectrum improves the sensitivity of the fiber sensor. In this work, a spectroscopy study of lophine was carried out and the absorption spectrum was found to be in the wavelength range of 290 to 375 nm. Furthermore, the absorbance dependence of lophine as a function of temperature was studied. A fiber optic temperature sensor was built using an optical source with wavelength of 365 nm to improve sensitivity. The sensitivity at this wavelength was compared to the infrared wavelengths sensitivities. Finally, the sensor response was characterized and validated with a commercially available electronic temperature sensor.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2021.110378