All-Fiber DBR-Based Sensor Interrogation System for Measuring Acoustic Waves

<table>(a) Effect of increasing the electrode separation <svg height="10.325" id="M9" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.1875 10.325" width="11.1875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐿</tspan>
</text>
</g>
</g>
</svg> on the detected signal when the DBR is placed on (a) a plastic plate and (b) a metal plate. <svg height="10.325" id="M10" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 15.175 10.325" width="15.175" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐻</tspan>
</text>
</g>
</g>
</svg> is fixed at 3.5 cm.</table>

Journal of Sensors

fig7

Figure 7

Figure 7: All-Fiber DBR-Based Sensor Interrogation System for Measuring Acoustic Waves 