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Proceedings Paper

Centimeter-range spatial resolution distributed sensing by BOFDA
Author(s): Romeo Bernini; Aldo Minardo; Luigi Zeni
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Paper Abstract

We demonstrate both numerically and experimentally the possibility to bring the spatial resolution of Brillouin optical frequency-domain analysis (BOFDA) distributed sensors in the cm-range. The numerical analysis is aimed to understand the effects of acoustic wave modulation on the accuracy of BOFDA systems when operating with submeter spatial resolution. We demonstrate that these effects lead to an error in strain/temperature estimation, which depends on the amount of strain/temperature change, and on the peak searching algorithm applied to the acquired spectra. Experimental measurements of BOFDA traces up to 3.5 GHz, equivalent to 3-cm spatial resolution, are presented and discussed.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77532C (17 May 2011); doi: 10.1117/12.886060
Show Author Affiliations
Romeo Bernini, Istituto per il Rilevamento Elettromagnetico dell'Ambiente, CNR (Italy)
Aldo Minardo, Seconda Univ. degli Studi di Napoli (Italy)
Luigi Zeni, Seconda Univ. degli Studi di Napoli (Italy)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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