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Underwater Acoustic Sensors Based on Fiber Bragg Gratings
Department for Technologies, University of Naples “Parthenope”, Centro Direzionale, Isola C4, 80143, Naples, Italy
Department of Engineering, University of Sannio, Corso Garibaldi, 82100, Benevento, Italy
Istituto per i Materiali Compositi e Biomedici, CNR, 80125, Naples, Italy
OptoSmart s.r.l., 80121, Naples, Italy
* Author to whom correspondence should be addressed.
Received: 19 May 2009; in revised form: 3 June 2009 / Accepted: 3 June 2009 / Published: 5 June 2009
Abstract: We report on recent results obtained with a fiber optic hydrophone based on the intensity modulation of the laser light in a FBG (Fiber Bragg Grating) under the influence of the sound pressure. In order to control the behavior of the hydrophone in terms of sensitivity and bandwidth, FBGs have been coated with proper materials, characterized by different elastic modulus and shapes. In particular, new experiments have been carried out using a cylindrical geometry with two different coating, showing that the sensitivity is not influenced by the shape but by the transversal dimension and the material characteristics of the coating.
Keywords: fiber optics sensors; fiber Bragg gratings; hydrophones
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Campopiano, S.; Cutolo, A.; Cusano, A.; Giordano, M.; Parente, G.; Lanza, G.; Laudati, A. Underwater Acoustic Sensors Based on Fiber Bragg Gratings. Sensors 2009, 9, 4446-4454.
Campopiano S, Cutolo A, Cusano A, Giordano M, Parente G, Lanza G, Laudati A. Underwater Acoustic Sensors Based on Fiber Bragg Gratings. Sensors. 2009; 9(6):4446-4454.
Campopiano, Stefania; Cutolo, Antonello; Cusano, Andrea; Giordano, Michele; Parente, Giuseppe; Lanza, Giuseppe; Laudati, Armando. 2009. "Underwater Acoustic Sensors Based on Fiber Bragg Gratings." Sensors 9, no. 6: 4446-4454.