27 April 2010 Diaphragm resonance-based fiber optic hydrophone
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Passive hydrophones with a minimal footprint are useful for a variety of underwater monitoring applications; a fiber optic hydrophone is being investigated. Fiber optic hydrophones have been used in offshore moored applications, and have the capability to cover large areas. A resonant hydrophone using a fiber Bragg grating (FBG) transducer for limited bandwidth operation is described and compared with predicted diaphragm resonances. A battery-power readout system using a laser diode source that can typically operate for a full day, and can be used in off-mooring applications such as in autonomous underwater vehicles, is outlined.
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Indu Fiesler Saxena, Narciso Guzman, Kaleonui J. Hui, Stephen Pflanze, "Diaphragm resonance-based fiber optic hydrophone", Proc. SPIE 7675, Photonics in the Transportation Industry: Auto to Aerospace III, 76750O (27 April 2010); doi: 10.1117/12.852898; https://doi.org/10.1117/12.852898

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