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Single fiber Bragg grating sensor with two sections of different diameters for longitudinal strain and temperature discrimination with enhanced strain sensitivity
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10.1063/1.3247900
/content/aip/journal/rsi/80/10/10.1063/1.3247900
http://aip.metastore.ingenta.com/content/aip/journal/rsi/80/10/10.1063/1.3247900

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the partially etched FBG sensor under longitudinal strain. and denote radius and area of cross sections of nonetched grating (FBG-1) and etched grating (FBG-2) fiber, respectively.

Image of FIG. 2.
FIG. 2.

Comparison of theoretical and experimental values of strain (in terms of wavelength shift) as a function of radius of the grating fiber. The inset is extended theoretical plot of strain as a function of radius of the fiber, .

Image of FIG. 3.
FIG. 3.

Shift of two peaks under arbitrary tension. The peak for etched FBG-2 experiences approximately four times shift compared to nonetched FBG-1.

Image of FIG. 4.
FIG. 4.

Plots (a) and (b) compare wavelength shift for FBG-1 with the shift in FBG-2 of diameter 61.75 and , respectively, as a function of strain.

Image of FIG. 5.
FIG. 5.

Comparison between applied and measured strains by the proposed model. The half-filled circle points on solid lines are applied strain at different temperature. The empty circle point nearest to the half-filled circle point is the respective strain obtained from the model.

Tables

Generic image for table
Table I.

Strain measurement in terms of resultant wavelength shift of FBG-1 and FBG-2 at fixed temperature . in first and fifth rows are the induced strain corresponding to applied load .

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/content/aip/journal/rsi/80/10/10.1063/1.3247900
2009-10-30
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single fiber Bragg grating sensor with two sections of different diameters for longitudinal strain and temperature discrimination with enhanced strain sensitivity
http://aip.metastore.ingenta.com/content/aip/journal/rsi/80/10/10.1063/1.3247900
10.1063/1.3247900
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