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Opt Express. 2012 Apr 9;20(8):8584-91. doi: 10.1364/OE.20.008584.

Fast Brillouin Optical Time Domain Analysis for dynamic sensing.

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The Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel.


A new technique for the fast implementation of Brillouin Optical Time Domain Analysis (BOTDA) is proposed and demonstrated, carrying the classical BOTDA method to the dynamic sensing domain. By using a digital signal generator which enables fast switching among 100 scanning frequencies, we demonstrate a truly distributed and dynamic measurement of a 100 m long fiber with a sampling rate of ~10 kHz, limited only by the fiber length and the frequency granularity. With 10 averages the standard deviation of the measured strain was ~5 µε.

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