Abstract
A plastic mandrel-based, embedded planar fiber-optic acoustic sensor has been developed by wrapping a single mode fiber around solid plastic mandrels which are embedded in an elastomeric encapsulant forming a planar device. The acoustic sensitivity of the sensor was found to be high and frequency independent. The high sensitivity is a result of the effective utilization of the low bulk modulus encapsulant (elastomer), while the frequency-independent sensitivity is a result of the low acceleration sensitivity of the sensor due to the out-of-plane fiber coil geometry and the presence of the mandrels. A comparison is made between this sensor and other large area fiber-optic sensor designs.
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