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Experimental characterization of group and phase delays induced by bending and twisting in multi-core fibers

Riccardo Veronese, Nicolas K. Fontaine, Haoshuo Chen, Mikael Mazur, Roland Ryf, Marco Santagiustina, Andrea Galtarossa, and Luca Palmieri

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Abstract

The local variations of group and phase propagation delays induced by bending and twisting a coupled core three-core fiber are experimentally characterized, for the first time, to the best of our knowledge, along the fiber length, with millimeter-scale spatial resolution. The measurements are performed by means of spectral correlation analysis on the fiber’s Rayleigh backscattered signal, enabling for a distributed measurement of the perturbation effects along the fiber length. A mathematical model validating the experimental results is also reported.

© 2021 Optical Society of America

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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