Photonic Hydrophones Based on Coated Fiber Bragg Gratings.

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Optoelectronic Division, Engineering Department University of Sannio, Benevento (Italy) Conclusions SOCIETÀ ITALIANA DI FISICA XCVIII CONGRESSO NAZIONALE Napoli, 17-21 Settembre 2012 A full 3-D numerical analysis of an FBG coated by a ring-shaped material in the frequency range 0.5-30 kHz The resonant behavior of such underwater acoustic sensor has been reported for the first time Numerical analysis demonstrated that the sensing performances can be tailored for a specific application by a proper selection of the coating features Experimental analysis of fabricated optical hydrophones A good agreement between the experimental characterizations and the numerically predicted sensitivity gains has been obtained, confirming the correct modeling of the hydrophone as well as its prediction capability Excellent capability to detect acoustic waves in the frequency range 4–35 kHz, extremely high sensitivity, resolutions of the order of a few Pascal, and good linearity without using active configurations. Sensor array and offshore preliminary testing highlighted the strong potential of FBG hydrophones to be employed for in-field trials and industrial applications
Optoelectronic Division, Engineering Department University of Sannio, Benevento (Italy) Thanks SOCIETÀ ITALIANA DI FISICA XCVIII CONGRESSO NAZIONALE Napoli, 17-21 Settembre 2012
Page 1 and 2: Optoelectronic Division, Engineerin
Page 11 and 12: Vac [V] CONDITIONING CIRCUIT TUNABL
Page 13 and 14: Sensitivity Gain [dB] 70 60 50 40 3
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Photonic Hydrophones Based on Coated Fiber Bragg Gratings.

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