V. CONCLUSION
A pre-loaded fiber optic pressure transducer has been
fabricated that is capable of recording the small variations
in pressure typical of sub-surface wave induced pressure
fluctuations. The transducer had a resolution of ∼2 cmH2 O
which was limited by the analogue to digital converter in the
data acquisition unit used for the tests. A single transducer
has been tested using an analogue detection scheme and
resolutions of 100 individual sensing elements. The technology has been
proven by monitoring pressure variations in both horizontal
and vertical orientations in a 10.5 m long wave tank and is
suitable for scaling up to large sensing arrays for monitoring in
real life situations such as surf-zones, estuaries, groundwater
aquifers and rivers. The sensors also provide an opportunity
to capture high spatial resolution data from laboratory experiments
which traditionally rely on conventional piezoelectric
pressure transducers or surface piercing capacitance probes.