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Proceedings Paper

Interferometric sensor for seismic noise measurement: theoretical model and experimental perfomances
Author(s): Fausto Acernese; Fabrizio Barone; Rosario De Rosa; Leopoldo Milano
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Paper Abstract

Laser interferometry is one of the most sensitive methods for small displacement measurement. This technique is successfully applied in several fields of physics with very good performances. Its large diffusion is mainly due to the availability of high-quality low-cost optical components and laser systems, but not less important is the general versatility of laser interferometric techniques. In this paper, we present a laser interferometric system for one-dimension local seismic noise measurement. After a description of the theoretical model, the experimental results are presented and discussed, also in comparison with a standard mechanic accelerometers, like the Episensor model FBA ES-T from Kinemetrics. The obtained result are encouraging, so that further studies are scheduled to check the performance of this system at the very low frequencies and to measure its intrinsic noise. Finally, although some problems, arosen in connection with the sensitivity and the stability of the interferometric system, have to be more deeply studied, it is already possible to think to design new versions of this system aimed to the measurement of more degrees of freedom.

Paper Details

Date Published: 22 October 2004
PDF: 9 pages
Proc. SPIE 5574, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IV, (22 October 2004); doi: 10.1117/12.565364
Show Author Affiliations
Fausto Acernese, Univ. degli Studi di Napoli Federico II (Italy)
Istituto Nazionale de Fisica Nucleare (Italy)
Fabrizio Barone, Univ. degli Studi di Salerno (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)
Rosario De Rosa, Univ. degli Studi di Napoli Federico II (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)
Leopoldo Milano, Univ. degli Studi di Napoli Federico II (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)


Published in SPIE Proceedings Vol. 5574:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IV
Manfred Ehlers; Francesco Posa, Editor(s)

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