Fiber laser hydrophone for low frequency signal detection

Wentao Zhang; Fang Li; Yuliang Liu

doi:10.1117/12.912980

30 January 2012 Fiber laser hydrophone for low frequency signal detection

Wentao Zhang, Fang Li, Yuliang Liu

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 835104 (2012) https://doi.org/10.1117/12.912980
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia

Abstract

A fiber laser hydrophone (FLH) based on a flat diaphragm and an L shaped lever is presented. This hydrophone uses an L shaped lever to transfer the acoustic pressure induced defection of the flat diaphragm to the axial elongation of the fiber laser. The curve where the L shaped lever contacts the diaphragm is a segment of an Archimedes spiral, which is used to enhance the responsivity. To compensate the hydrostatic pressure, a capillary tube is fixed at the end of the hydrophone. Both theoretical and experimental investigations are presented in this paper. The result shows that the proposed design has a high sensitivity of a flat frequency response below 1 kHz.

Citation Download Citation

Wentao Zhang, Fang Li, and Yuliang Liu "Fiber laser hydrophone for low frequency signal detection", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835104 (30 January 2012); https://doi.org/10.1117/12.912980

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