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Proceedings Paper

Brillouin distributed sensor over a 200km fiber-loop using a dual-pump configuration and colour coding
Author(s): S. Le Floch; F. Sauser; M. Llera; E. Rochat
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Paper Abstract

In this paper, we propose a new Brillouin Optical Time Domain Analysis (BOTDA) set-up that combines simultaneous Brillouin gain/loss measurements with colour coding. This technique gives the advantage that the pump power can greatly be increased, compared to other coding schemes, thus increasing the sensing range. A measurement over a 200 km fiber-loop is performed, with a 3 meter spatial resolution and an accuracy of ± 3 MHz (2σ) at the end of the sensing fiber. To the best of our knowledge, this is the best result obtained with a Brillouin sensor without Raman amplification.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575K (2 June 2014); doi: 10.1117/12.2057821
Show Author Affiliations
S. Le Floch, Haute Ecole Arc Ingénierie Siège (Switzerland)
F. Sauser, Haute Ecole Arc Ingénierie Siège (Switzerland)
M. Llera, Haute Ecole Arc Ingénierie Siège (Switzerland)
E. Rochat, Omnisens S.A. (Switzerland)

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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