Photonic Hydrophones Based on Coated Fiber Bragg Gratings.

Sensitivity Gain [dB]
70
60
50
40
30
20
10
Optoelectronic Division, Engineering Department
Numerical prediction
0
Experimental data
Elaborated
-10
0 5 10 15 20
Frequency [kHz]
University of Sannio, Benevento (Italy)
Sensitivity Gain [dB]
Experimental Validation
70
60
50
40
30
20
10
Numerical prediction
0
Experimental data
Elaborated
-10
0 5 10 15 20
Frequency [kHz]
SOCIETÀ ITALIANA DI FISICA
XCVIII CONGRESSO NAZIONALE
Napoli, 17-21 Settembre 2012
D-5 sensor D-10 sensor A-5 sensor
Sensitivity Gain [dB]
70
60
50
40
30
20
10
0
Numerical prediction
Experimental data
Elaborated
-10
0 5 10 15 20 25 30 35
Frequency [kHz]
• Experimental data confirm the resonant behavior of the underwater acoustic sensor outlined by the numerical analysis
• Acceptable prediction capabilities both in terms of resonant frequencies and sensitivity values have been obtained
• The slight disagreements between experimental and numerical data can be attributed to second order effects (i.e.
fabrication imperfections), which have not been taken into account in the simulations