Distributed and dynamic monitoring of 4km/sec waves using a Brillouin fiber optic strain sensor

Yair Peled; Lior Yaron; Avi Motil; Moshe Tur

doi:10.1117/12.2025640

20 May 2013 Distributed and dynamic monitoring of 4km/sec waves using a Brillouin fiber optic strain sensor

Yair Peled, Lior Yaron, Avi Motil, Moshe Tur

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 879434 (2013) https://doi.org/10.1117/12.2025640
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

We report a Brillouin-based fully distributed and dynamic monitoring of a strain wave, propagating at a speed of ~4km/sec in a 6m long fiber. Using an audio speaker, a mechanical impulse was introduced to one end of a 6m long optical fiber, initiating a strain wave propagating towards the other fixed end of the fiber. Employing a simplified version of the Slope-Assisted Brillouin Optical Time Domain Analysis (SA-BOTDA) technique, the whole length of the fiber was interrogated every 1μs (before averaging). A dynamic spatially and temporally continuous map of the strain was obtained, from which the wave velocity could be deduced. With a trade-off among sampling rate, range and signal to noise ratio, kHz sampling rates and hundreds of meters of range can be covered with spatial resolutions down to a few centimeters.

Citation Download Citation

Yair Peled, Lior Yaron, Avi Motil, and Moshe Tur "Distributed and dynamic monitoring of 4km/sec waves using a Brillouin fiber optic strain sensor", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 879434 (20 May 2013); https://doi.org/10.1117/12.2025640

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