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Mapping of chromatic-dispersion distribution along optical fibers with 20-m spatial resolution

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3 Author(s)
Kwang-Yong Song ; Ecole Polytechnique Fed. de Lausanne, Nanophotonics & Metrol. Lab., Lausanne, Switzerland ; Herraez, M.G. ; Thevenaz, L.

The accurate mapping of chromatic-dispersion distribution along single-mode optical fibers with the best spatial resolution ever reported is experimentally demonstrated. The method consists of a new way of probing four-wave-mixing (FWM) efficiency along the fiber using Brillouin-optical-time-domain analysis (BOTDA). The new setup eliminates many noise problems found in previous configurations, allowing a tenfold improvement in the spatial resolution of this kind of measurements. Resolutions of 20 m in a 1.1-km standard fiber and 150 m in a 6.7-km dispersion-shifted fiber (DSF), respectively, were achieved.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 12 )