Abstract
A fiber laser hydrophone with enhanced sensitivity is demonstrated.
Two diaphragms with a hard core fixed at each center are used as the sensing
element. Theoretical analysis shows that the Young's modulus of the diaphragm
and the radius of the hard core have significant effect on the acoustic sensitivity.
Experiments are carried out to test this effect and the performance of the
hydrophone. The experimental result agrees well with the theoretical result,
and a sensitivity of 7 nm/MPa has been achieved.
© 2008 IEEE
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