Abstract

We present a detailed numerical study of supercontinuum generation in hexagonal seven-core fibers with single-core input in the short pulse regime. Important spectral broadening mechanisms are shown to result from or strongly depend on the frequency dependence of linear coupling between the cores. Namely, soliton supermode transitions, inter-supermodal four-wave mixing, and inter-supermodal dispersive wave generation are among the key nonlinear phenomena specific to multi-core fibers, and their relative importance is heavily dependent on core separation.

© 2019 Optical Society of America

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Supplementary Material (3)

NameDescription
» Visualization 1       The total spectrogram over all cores of a hexagonal seven-core fiber at various propagation distances. The cores have a diameter of 6 µm and are separated by 12 µm. The input pulse is a 15 kW 100 fs sech-pulse launched in the center core.
» Visualization 2       The total spectrogram over all cores of a hexagonal seven-core fiber at various propagation distances. The cores have a diameter of 6 µm and are separated by 25 µm. The input pulse is a 15 kW 100 fs sech-pulse launched in the center core.
» Visualization 3       The total spectrogram over all cores of a hexagonal seven-core fiber at various propagation distances. The cores have a diameter of 6 µm and are separated by 15.5 µm. The input pulse is a 15 kW 100 fs sech-pulse launched in the center core.

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