Equivalent-particle theory for time soliton pairs in nonlinear optical fibers
Zhou Qingchun,Zeng Xiaoxiang(School of Mathematics and Physics,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China)
The equivalent-particle viewpoint was applied to investigate the interaction of two unequal-amplitude solitons propagating in nonlinear fibers by regarding the interaction as a perturbation.Moreover,the Newtonian equations for the motion of solitons were given.Results show that the interaction of unequal-amplitude soliton pair can be approximated as a product of a propagation-distance-dependent local interaction factor and a propagation-distance-independent nonlocal interaction factor.The local factor forces soliton interaction to alternate between the attractive and the repulsive.On a large scale,the average of this character markedly reduces the interaction of the unequal-amplitude solitons.
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