Stripe dark solitons in a nonlinear optical fiber with second- and fourth-order dispersion

Author:

Peng Gao, Li-Zheng Lv, Xin Li

Keyword:

Nonlinear Sciences, Pattern Formation and Solitons, Pattern Formation and Solitons (nlin.PS)

journal:

date:

2023-12-11 00:00:00

Abstract

We study the soliton excitations in a nonlinear optical fiber with the second- and fourth-order dispersion, and find the emergence of stripe dark solitons (SDSs) in addition to the existing stripe bright solitons (SBSs). The SDSs can exhibit the fundamental structures and their counterparts without a phase step, as well as the compound structures with different numbers of humps. By the modified linear stability analysis, we regard the formation of fundamental SDS as the competition between its periodicity and localization, and analytically give its existence condition, oscillation frequency, and transmission stability, which show great agreements with numerical results. We also show good predictions for the characteristics of SBS, and find that SBS will become the pure-quartic soliton when its periodicity and localization keep balance. Our results can be observable with current experimental techniques in nonlinear optical fibers, and our method can also guide the discovery of stripe solitons in other physical systems.

PDF: Stripe dark solitons in a nonlinear optical fiber with second- and fourth-order dispersion.pdf