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Proceedings Paper

Brillouin Standing Wave Reflectometry (BSWR): a novel approach for high sensitivity, fast and distributed strain sensing in optical fibers
Author(s): A. Bergman; M. Tur
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Paper Abstract

We demonstrate a novel distributed fiber sensing technique with a record broadband sensitivity of 10nƐ/√Hz at a sampling rate of 1MHz. A standing acoustic wave is generated by all-optical excitation of two simultaneously counter-propagating Brillouin dynamic gratings. A dual-tone readout probe pulse is used for the distributed measurement of strain-induced nonlinear phase-shifts of the acoustic wave. The phase is demodulated in electrical domain from the beat note of the reflected probe following the hardware-simpler direct detection. The measurement of 5kHz strain vibrations with a spatial resolution of 20cm (limited only by the 0.5ns switching time of our SOA) is reported.

Paper Details

Date Published: 8 June 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103239P (8 June 2017); doi: 10.1117/12.2276368
Show Author Affiliations
A. Bergman, Bar Ilan Univ. (Israel)
M. Tur, Tel Aviv Univ. (Israel)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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