Nonlinear diffusion and beam self-trapping in diffraction-managed waveguide arrays.
Nonlinear diffusion and beam self-trapping in diffraction-managed waveguide arrays.
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DOI：
10.1364/oe.15.009547
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发表时间：
2007-07
期刊：
影响因子：
3.8
通讯作者：
I. Garanovich;A. Sukhorukov;Y. Kivshar
中科院分区：
文献类型：
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作者：
I. Garanovich;A. Sukhorukov;Y. Kivshar
我们研究了光在由周期性弯曲的光波导阵列形成的衍射管理光子晶格中的非线性传播。我们根据输入功率确定了光在这种结构中非线性传播的不同状态。我们从低功率下的自准直开始，并证明了随着光束功率的增加，非线性破坏了光束的自成像并导致非线性扩散。在更高的功率下，我们观察到一个向自捕获的急剧转变和离散衍射管理孤子的形成。
We study nonlinear propagation of light in diffraction-managed photonic lattices created by periodically-curved arrays of optical waveguides. We identify different regimes of the nonlinear propagation of light in such structures depending on the input power. We start from the regime of self-collimation at low powers and demonstrate that, as the beam power increases, nonlinearity destroys the beam self-imaging and leads to nonlinear diffusion. At higher powers, we observe a sharp transition to the self-trapping and the formation of discrete diffraction-managed solitons.