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22 October 2004 Interferometric sensor for seismic noise measurement: theoretical model and experimental perfomances
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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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fausto Acernese, Fabrizio Barone, Rosario De Rosa, and Leopoldo Milano "Interferometric sensor for seismic noise measurement: theoretical model and experimental perfomances", Proc. SPIE 5574, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IV, (22 October 2004); https://doi.org/10.1117/12.565364
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