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Towards a High Performance Fiber Laser Hydrophone

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3 Author(s)
Scott Foster ; Maritime Operations Division, Defence Science and Technology Organisation, Edinburgh, Australia ; Alexei Tikhomirov ; John van Velzen

The operating principle and theory of a fiber laser bender hydrophone is presented. We report experimental results for a micro-engineered silicon fiber laser hydrophone. The hydrophone has a flat pressure responsivity of 107 dB re Hz/Pa over a bandwidth exceeding 5 kHz, corresponding to ocean noise limited acoustic sensitivity. The first structural resonance of the hydrophone is 9 kHz in water and the acceleration rejection is in excess of 0 dB re ms-2/Pa up to 5 kHz.

Published in:

Journal of Lightwave Technology  (Volume:29 ,  Issue: 9 )