A fiber optic Bragg grating seismic sensor

A. Laudati; F. Mennella; M. Esposito; A. Cusano; M. Giordano; G. Breglio; S. Sorge; C. Calisti Tassini; A. Torre; G. D'Altrui; A. Cutolo

doi:10.1117/12.738396

2 July 2007 A fiber optic Bragg grating seismic sensor

A. Laudati, F. Mennella, M. Esposito, A. Cusano, M. Giordano, G. Breglio, S. Sorge, C. Calisti Tassini, A. Torre, G. D'Altrui, A. Cutolo

Author Affiliations +

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66191C (2007) https://doi.org/10.1117/12.738396
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

Here we present a fiber optic seismic waves sensor based on in-fiber Bragg gratings. Fiber Bragg Grating sensors have been demonstrated to have very high sensitivity to dynamical strain in the sub-micro-strain range and very extended dynamical response from static to very high frequency. The seismic sensing system is based on the integration of three FBGs dynamical strain sensors in a mechanical structure acting as an inverse pendulum. Polar symmetry of the mechanical system and 120° placement of the FBG sensors guarantee a directional capability of the seismic sensor. Design, manufacturing and preliminary dynamical testing of the seismic sensor are discussed.

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A. Laudati, F. Mennella, M. Esposito, A. Cusano, M. Giordano, G. Breglio, S. Sorge, C. Calisti Tassini, A. Torre, G. D'Altrui, and A. Cutolo "A fiber optic Bragg grating seismic sensor", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191C (2 July 2007); https://doi.org/10.1117/12.738396

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