Long Period Grating Transducer for Measurement of Ethanol Concentration in Water Solution

Gustavo R. C. Posseti, Emmanuelle Camilotti, Marcia Muller, José Luís Fabris

Abstract


This work shows results of the applicability of an optical fiber device, the long period grating, as a transducer to determine the ethanol concentration in samples obtained by the mixture of ethanol and pure water in different proportions. The amplitude and central wavelength of the grating resonance attenuation was measured with the device immersed in samples with ethanol concentration ranging from 0 % to 99.6 %. The device performance, when interrogated in wavelength and amplitude, was analyzed considering its sensitivity, resolution, repeatability, linearity and uncertainty. The results showed that the transducer can be used to measure the ethanol-water concentration with resolution of up to 0.23 %.

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References


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