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Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Schematic illustration of FBG pitch expansion due to hydrogel swelling corresponding.

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Presentation on theme: "Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Schematic illustration of FBG pitch expansion due to hydrogel swelling corresponding."— Presentation transcript:

1 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Schematic illustration of FBG pitch expansion due to hydrogel swelling corresponding to ambient pH changes. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

2 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. (a) Schematic of the experimental setup and (b) experimental setup. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

3 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Response of hydrogel-coated FBG sensor as a function of pH in time scale. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

4 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. FBG peak shift corresponding to different ambient pH buffers. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

5 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Repetitive response of the sensor system. Inset shows the standard deviation for three trials. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

6 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Comparison between stimulated and experimental results. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

7 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Stress–strain curve for PVA/PAA hydrogel layer. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

8 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Sensor response while increasing and decreasing the ambient pH. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

9 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Hysteresis curve due to gradual increase and decrease of ambient pH. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

10 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Oscillating behavior of the sensor between pH 2 and pH 6. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

11 Date of download: 9/18/2016 Copyright © 2016 SPIE. All rights reserved. Swelling and deswelling times of hydrogel. Figure Legend: From: Hydrogel-coated fiber Bragg grating sensor for pH monitoring Opt. Eng. 2016;55(6):066112. doi:10.1117/1.OE.55.6.066112

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