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1

Department for Technologies, University of Naples -Parthenope-, Centro Direzionale, Isola C4, 80143, Naples, Italy

2

Department of Engineering, University of Sannio, Corso Garibaldi, 82100, Benevento, Italy

3

Istituto per i Materiali Compositi e Biomedici, CNR, 80125, Naples, Italy

4

OptoSmart s.r.l., 80121, Naples, Italy





*

Author to whom correspondence should be addressed.



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. View Full-Text

Keywords: fiber optics sensors; fiber Bragg gratings; hydrophones fiber optics sensors; fiber Bragg gratings; hydrophones





Autor: Stefania Campopiano 1,* , Antonello Cutolo 2, Andrea Cusano 2, Michele Giordano 3, Giuseppe Parente 4, Giuseppe Lanza 4 and Armando Laudati 4

Fuente: http://mdpi.com/



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