Journal
OPTICS EXPRESS
Volume 19, Issue 24, Pages 23845-23856Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.023845
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Funding
- European Community [225663, 265954]
- European COST action [TD1001 - OFSESA]
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We propose and demonstrate a long-range Brillouin Optical Time-Domain Analysis (BOTDA) distributed sensing system making use of an unbalanced double sideband probe formed by a Stokes and an anti-Stokes line. In particular, we show that for each measuring condition an optimal Stokes /anti-Stokes input power ratio exists, allowing a larger suppression of nonlocal effects induced by pump depletion. Experiments on a 50 km single-mode sensing fiber with 5 meters spatial resolution are reported. (C) 2011 Optical Society of America
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