Properties of spatial optical solitons to different degrees of nonlocality

被引:23
作者
Cao, JN [1 ]
Guo, Q [1 ]
机构
[1] S China Normal Univ, Sch Informat & Optoelect Sci & Engn, Guangzhou 510631, Peoples R China
关键词
nonlocal nonlinear Schrodinger equation; spatial optical soliton; critical power; phase;
D O I
10.7498/aps.54.3688
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The propagation of optical beams in nonlocal nonlinear media is modeled by the nonlocal nonlinear Schrodinger equation. In this paper, discussed is the propagation properties of the optical spatial solitons in the media to different degrees of the nonlocality. An iteration algorithm based on the split-step Fourier method is presented to obtain the solutions of the solitons. The profiles of the solitons to different degrees of the nonlocality are numerically obtained in the assumption that nonlinear response of the media is Gaussian. The stability of the solutions is also demonstrated numerically, which shows that the stable solitons can survive to different degrees of nonlocality. The amplitude profiles of the soliton transit gradually and continuously from a Gaussian function in the strongly nonlocal case into a hyperbolic secant function in the local case. The critical power for the solitons decreases as the nonlocality decreases. The weaker the nonlocality, the slower the soliton phase that has a linear relation with the propagation distance increases.
引用
收藏
页码:3688 / 3693
页数:6
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