Gap solitons in a model of a hollow optical fiber

I. M. Merhasin*, Boris A. Malomed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We introduce a model for two coupled waves propagating in a hollow-core fiber: a linear dispersionless core mode and a dispersive nonlinear surface mode. The linear coupling between them may open a bandgap through the mechanism of avoidance of crossing between dispersion curves. The third-order dispersion of the surface mode is necessary for the existence of the gap. Numerical investigation reveals that the entire bandgap is filled with solitons, and they are stable in direct simulations. The gap-soliton (GS) family includes stable pulses moving relative to the given reference frame up to limit values of the corresponding boost δ, beyond which they do not exist. The limit values are asymmetric for δ><0. Recently observed solitons in hollow-core photonic crystal fibers may belong to this GS family.

Original languageEnglish
Pages (from-to)1105-1107
Number of pages3
JournalOptics Letters
Issue number10
StatePublished - 15 May 2005


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