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Proceedings Paper

Laser interferometric sensor for seismic waves velocity measurement
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Paper Abstract

Laser interferometry is one of the most sensitive methods for small displacement measurement for scientific and industrial applications, whose wide diffusion in very different fields is due not only to the high sensitivity and reliability of laser interferometric techniques, but also to the availability of not expensive optical components and high quality low-cost laser sources. Interferometric techniques have been already successfully applied also to the design and implementation of very sensitive sensors for geophysical applications. In this paper we describe the architecture and the expected theoretical performances of a laser interferometric velocimeter for seismic waves measurement. We analyze and discuss the experimental performances of the interferometric system, comparing the experimental results with the theoretical predictions and with the performances of a state-of the art commercial accelerometer. The results obtained are very encouraging, so that we are upgrading the system in order to measure the local acceleration of the mirrors and beam splitter of the velocimeter using an ad hoc designed monolithic accelerometers for low frequency direct measurement of the seismic noise.

Paper Details

Date Published: 12 November 2007
PDF: 12 pages
Proc. SPIE 6749, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VII, 67492P (12 November 2007); doi: 10.1117/12.737802
Show Author Affiliations
Fausto Acernese, Univ. degli Studi di Salerno (Italy)
Rosario De Rosa, Univ. degli Studi di Napoli Federico II (Italy)
Fabio Garufi, Univ. degli Studi di Napoli Federico II (Italy)
Rocco Romano, Univ. degli Studi di Salerno (Italy)
Fabrizio Barone, Univ. degli Studi di Salerno (Italy)

Published in SPIE Proceedings Vol. 6749:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VII
Manfred Ehlers; Ulrich Michel, Editor(s)

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