光学格子中孤子的相互作用

利用解析和数值方法,对具有横向折射率周期性调制的克尔型非线性介质中光学格子中孤子的相互作用进行了研究,得到孤子相互作用的演化方程及控制格子孤子相互作用的传输条件,考查了介质参数与光束参数对孤子相互作用的影响.结果表明:调制周期和调制深度的变化影响了格子孤子相互作用的周期大小,而相对振幅的差异对孤子相互作用的周期影响较小,特别是反相孤子(初始相位差θ为π)能够有效控制格子孤子的相互作用.

Interaction Between Solitons in the Optical Lattices

Interaction of optical lattice soliton in Kerr-type nonlinear medium with transverse periodic modulation of refractive index is investigated analytically and numerically. The equations and the conditions of propagation governing evolution of the soliton interaction are obtained. The effect of the medium parameters and beam parameters on period of soliton interaction is discussed. The results show that the change of modulation period and modulation depth affect the period of soliton interaction and the difference of relative amplitude barely affects period of soliton interaction. In particular the lattice soliton interaction is effectively avoided by opposite phase soliton.