Open AccessDistributed spatial mode dispersion measurement along strongly coupled multicore fibers based on the correlation analysis of Rayleigh backscattering amplitudes
Author(s) -
Shin Ohno,
Kunihiro Toge,
Daisuke Iida,
Tetsuya Manabe
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.029650
Subject(s) - rayleigh scattering , reflectometry , optics , backscatter (email) , dispersion (optics) , amplitude , optical fiber , materials science , fiber optic sensor , fiber , core (optical fiber) , graded index fiber , physics , computer science , telecommunications , time domain , composite material , wireless , computer vision
We describe a method for measuring spatial mode dispersion (SMD) distribution along a strongly coupled multicore fiber (SC-MCF). The SMD has been defined for characterizing an SC-MCF, and it changes with respect to local fiber bending and twisting. However, conventional measurement methods characterize only the overall SMD, and cannot identify fiber portions where the environmental conditions affect the SMD. This paper demonstrates distributed SMD measurement along an SC-MCF by auto-correlating Rayleigh backscattering amplitudes obtained with coherent optical reflectometry. We confirm our method experimentally, and distinguish the difference between the SMD growth along twisted and non-twisted fiber sections in concatenated SC-MCFs.