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Fiber Laser Hydrophone Based on Double Diaphragms: Theory and Experiment

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4 Author(s)
Wentao Zhang ; Optoelectron. Syst. Lab., Chinese Acad. of Sci., Beijing ; Yuliang Liu ; Fang Li ; Hao Xiao

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.

Published in:

Lightwave Technology, Journal of  (Volume:26 ,  Issue: 10 )

Date of Publication:

May15, 2008

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