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arXiv 0712.2899nlin.PS
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耗散介质中项链-环斑图与涡旋和基孤子的融合

Fusion of necklace-ring patterns into vortex and fundamental solitons in dissipative media

Y. J. He, Boris A. Malomed, H. Z. Wang

摘要:

基于二维复Ginzburg-Landau方程和五阶非线性项,我们证明了在激光腔的一般模型中,局域空间光束的项链形阵列可以合并成稳定的基孤子或涡旋孤子.融合的结果由初始项链中珠子的数量2N及其拓扑电荷M控制。我们预测并通过系统模拟证实了出射孤子的涡度是N和M之差的绝对值。发现并解释了融合的阈值特性。如果阵列的初始半径(R 0)太大,它只是保持项链形状(如果R 0稍微小一点,项链的特征是部分熔合),而如果R 0太小,阵列消失。

英文摘要:

We demonstrate that necklace-shaped arrays of localized spatial beams can merge into stable fundamental or vortex solitons in a generic model of laser cavities, based on the two-dimensional complex Ginzburg-Landau equation with the cubic-quintic nonlinearity. The outcome of the fusion is controlled by the number of beads in the initial necklace, 2N, and its topological charge, M. We predict and confirm by systematic simulations that the vorticity of the emerging soliton is the absolute value of difference of N and M. Threshold characteristics of the fusion are found and explained too. If the initial radius of the array (R0) is too large, it simply keeps the necklace shape (if R0 is somewhat smaller, the necklace features a partial fusion), while, if R0 is too small, the array disappears.

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