Centimeter-range spatial resolution distributed sensing by BOFDA

Romeo Bernini; Aldo Minardo; Luigi Zeni

doi:10.1117/12.886060

17 May 2011 Centimeter-range spatial resolution distributed sensing by BOFDA

Romeo Bernini, Aldo Minardo, Luigi Zeni

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77532C (2011) https://doi.org/10.1117/12.886060
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

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.

Citation Download Citation

Romeo Bernini, Aldo Minardo, and Luigi Zeni "Centimeter-range spatial resolution distributed sensing by BOFDA", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77532C (17 May 2011); https://doi.org/10.1117/12.886060

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