Design and test of a laser-based optical-fiber Bragg-grating accelerometer for seismic applications

Year: 2008

Authors: Gagliardi G., Salza M., Ferraro P., De Natale P., Di Maio A., Carlino S., De Natale G., Boschi E.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Sezione di Napoli, Comprensorio ‘A Olivetti’, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Ansaldo STS, Napoli, via Nuova delle Brecce 260, Napoli, Italy;
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli—Osservatorio Vesuviano, via Diocleziano, 328, 80124 Napoli, Italy;
Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata 605, 00143 Roma, Italy

Abstract: We report on a proof-of-principle work aimed at the development of fast-response fiber-optic accelerometers for seismic monitoring. The system is based on a semiconductor diode-laser source that interrogates a newly devised two-dimensional inertial sensor suitable for measurement of horizontal ground accelerations. Plane acceleration components of the sensor\’s mass are detected by two fiber Bragg gratings anchored to its structure. Calibration and comparison with a commercial accelerometer are presented. A great potential, in terms of frequency response and sensitivity, is demonstrated in view of possible field applications in active seismic areas.


Volume: 19 (8)      Pages from: 085306  to: 085306

KeyWords: Accelerometers; Bragg gratings; Fiber Bragg gratings; Fibers; Frequency response; Optical fibers; Seismology; Semiconductor diodes; Semiconductor lasers, Design and tests; Fiber optic accelerometer; Field application; Ground accelerations; Proof of principles; Seismic application; Seismic monitoring; Strain sensing, Seismic design
DOI: 10.1088/0957-0233/19/8/085306

Citations: 63
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