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Proceedings Paper

Brillouin dynamic grating time-domain slope-assisted fast and distributed strain sensing
Author(s): A. Bergman; L. Yaron; T. Langer; M. Tur
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Paper Abstract

A new fast and distributed optical time-domain sensing technique, employing the slope of Brillouin dynamic gratings (BDG) in polarization-maintaining (PM) fibers, is proposed and demonstrated. The strain sensitivity of the reflectivity of a pulsed probe, orthogonally polarized to the pumps which generated the BDG, is shown to depend on both pump and probe detuning. An optimum detuning point is then found, which provides maximum strain sensitivity. We report the measurement of 400Hz strain vibrations with a spatial resolution of 4.2cm at a sampling rate of 16kHz.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915770 (2 June 2014); doi: 10.1117/12.2059288
Show Author Affiliations
A. Bergman, Tel-Aviv Univ. (Israel)
L. Yaron, Tel-Aviv Univ. (Israel)
T. Langer, Tel-Aviv Univ. (Israel)
M. Tur, Tel-Aviv Univ. (Israel)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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