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A multiplexed fiber Bragg grating sensor for simultaneous salinity and temperature measurement
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10.1063/1.2890156
/content/aip/journal/jap/103/5/10.1063/1.2890156
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/5/10.1063/1.2890156

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of the distribution of the water concentration along the cross section of the fiber.

Image of FIG. 2.
FIG. 2.

Multiplexed FBG sensor system and measurement: (a) setup for FBG inscription, (b) illustration of the FBG sensor system used in this study, and (c) experimental setup for the measurement of sensing performance in an environmental chamber or a water bath.

Image of FIG. 3.
FIG. 3.

Transmission spectrum of the FBG sensor system.

Image of FIG. 4.
FIG. 4.

Bragg wavelength of the acrylate-coated FBG as a function of temperature in the environmental chamber and the water bath.

Image of FIG. 5.
FIG. 5.

Time evolution of the shift of the Bragg wavelength of the acrylate-coated FBG.

Image of FIG. 6.
FIG. 6.

Bragg wavelength of the acrylate-coated FBG as a function of relative humidity in the environmental chamber at a temperature of .

Image of FIG. 7.
FIG. 7.

Bragg wavelength of the polyimide-coated FBG as a function of temperature in the environmental chamber and the water bath.

Image of FIG. 8.
FIG. 8.

Bragg wavelength of the polyimide-coated FBG as a function of relative humidity in the environmental chamber at temperatures of 10, 20, 50, and .

Image of FIG. 9.
FIG. 9.

Time evolution of the shift of the Bragg wavelength of the polyimide-coated FBG.

Image of FIG. 10.
FIG. 10.

Transmission spectra of the polyimide-coated FBG at different NaCl concentrations.

Image of FIG. 11.
FIG. 11.

The relationship between the water concentration in the coating of the polyimide-coated FBG and the ambient NaCl concentration.

Image of FIG. 12.
FIG. 12.

Bragg wavelengths of acrylate- and polyimide-coated FBGs as functions of NaCl concentrations.

Tables

Generic image for table
Table I.

Thermo-optic parameters of the fused silica fiber and the polyimide coating.

Generic image for table
Table II.

Characteristics of the multiplexed sensor system with two polymer-coated FBGs.

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/content/aip/journal/jap/103/5/10.1063/1.2890156
2008-03-11
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A multiplexed fiber Bragg grating sensor for simultaneous salinity and temperature measurement
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/5/10.1063/1.2890156
10.1063/1.2890156
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