Dark solitons in dual-core waveguides with dispersive coupling

Yaroslav V. Kartashov, Vladimir V. Konotop*, Boris A. Malomed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report on new types of two-component one-dimensional dark solitons (DSs) in a dual-core waveguide model with normal group-velocity dispersion and Kerr nonlinearity in both cores, the coupling between which is also dispersive. In the presence of the dispersive coupling, quiescent DSs supported by the zero-frequency background are always gray, being stable with the out-of-phase background, i.e., for opposite signs of the fields in the cores. In contrast, the background with a nonzero frequency supports quiescent black solitons which may be stable for both out-ofphase and in-phase backgrounds, if the dispersive coupling is sufficiently strong. Only DSs supported by the out-ofphase background admit an extension to the case of nonzero phase mismatch between the cores.

Original languageEnglish
Pages (from-to)4126-4129
Number of pages4
JournalOptics Letters
Issue number17
StatePublished - 2015


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