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, 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.
Instituto de Óptica, Consejo Superior de Investigaciones Científicas, 28006 Madrid, Spain.
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X
Angulo-Vinuesa
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S
Martin-Lopez
P
P
Corredera
M
M
Gonzalez-Herraez
D000465:Algorithms; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*