Abstract
A quasi-phase-matched technique is introduced for soliton transmission in a quadratic[x(2)]nonlinear crystal to realize the stable transmission of dipole solitons in a one-dimensional space under three-wave mixing.We report four types of solitons as dipole solitons with distances between their bimodal peaks that can be laid out in different stripes.We study three cases of these solitons:spaced three stripes apart,one stripe apart,and confined to the same stripe.For the case of three stripes apart,all four types have stable results,but for the case of one stripe apart,stable solutions can only be found at ω1=ω2,and for the condition of dipole solitons confined to one stripe,stable solutions exist only for Typel and Type3 at ω1=ω2.The stability of the soliton solution is solved and verified using the imaginary time propagation method and real-time transfer propagation,and soliton solutions are shown to exist in the multistability case.In addition,the relations of the transportation characteristics of the dipole soliton and the modulation parameters are numerically investigated.Finally,possible approaches for the experimental realization of the solitons are outlined.
基金项目
国家自然科学基金(12274077)
国家自然科学基金(11874112)
Research Fund of the Guangdong Hong Kong Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology(2020B1212030010)
Graduate Innovative Talents Training Program of Foshan University()
NETL
NSTL
万方数据