Raman-assisted Brillouin optical time-domain analysis with sub-meter resolution over 100 km

Sub-meter resolution in long-distance Brillouin Optical Time Domain Analysis (BOTDA) cannot be trivially achieved due to several issues including: resolution-uncertainty trade-offs, self-phase modulation, fiber attenuation, depletion, etc. In this paper we show that combining Raman assistance, diffe...

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Bibliographic Details
Published in:Optics express 2012-05, Vol.20 (11), p.12147-12154
Main Authors: Angulo-Vinuesa, X, Martin-Lopez, S, Corredera, P, Gonzalez-Herraez, M
Format: Article
Language:English
Subjects:
Algorithms
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Light
Models, Theoretical
Optical Devices
Refractometry - instrumentation
Scattering, Radiation
Spectrum Analysis, Raman - instrumentation
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Summary:Sub-meter resolution in long-distance Brillouin Optical Time Domain Analysis (BOTDA) cannot be trivially achieved due to several issues including: resolution-uncertainty trade-offs, self-phase modulation, fiber attenuation, depletion, etc. In this paper we show that combining Raman assistance, differential pulse-width pair (DPP) measurements and a novel numerical de-noising procedure, we could obtain sub-meter resolution Brillouin optical time-domain analysis over a range of 100 km. We successfully demonstrate the detection of a 0.5 meter hot-spot in the position of worst contrast along the fiber.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.012147