Abstract
We study propagation in a cyclic symmetric multicore fiber where the core radii randomly fluctuate along the propagation direction. We propose a hybrid analytic-numerical method to optimize the amplitude and frequency of the fluctuations that suppress power transfer between outer and inner cores. This framework allows us to analytically find noise amplitude parameters that optimally suppress crosstalk. Our predictions are confirmed by numerical experiments using finite difference beam propagation methods for realistic C-band fibers. The analytic part of our method is general, provides the optimum fluctuation amplitude independent of the array geometry, as long as normal modes can be calculated. It works for both correlated and uncorrelated fluctuations allowing its use for any given optical system described by coupled mode theory.
Highlights
We study propagation in a cyclic symmetric multicore fiber where the core radii randomly fluctuate along the propagation direction
We provide a theoretical description of experimental crosstalk suppression in a cyclic array of homogeneous cores with independent random fluctuations in core radii along the propagation direction
We compare our results with a numerical experiment using finite difference beam propagation methods with parameters from experimental devices in either multicore fibers or laser inscribed waveguide arrays
Summary
We study propagation in a cyclic symmetric multicore fiber where the core radii randomly fluctuate along the propagation direction. We propose a hybrid analytic-numerical method to optimize the amplitude and frequency of the fluctuations that suppress power transfer between outer and inner cores. This framework allows us to analytically find noise amplitude parameters that optimally suppress crosstalk. The analytic part of our method is general, provides the optimum fluctuation amplitude independent of the array geometry, as long as normal modes can be calculated. We provide a theoretical description of experimental crosstalk suppression in a cyclic array of homogeneous cores with independent random fluctuations in core radii along the propagation direction. We compare our results with a numerical experiment using finite difference beam propagation methods with parameters from experimental devices in either multicore fibers or laser inscribed waveguide arrays
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