Using the discrete nonlinear Schrodinger equation, we study the laser radiation self-action dynamics in a nanostructured waveguide system. It is shown that for a laser pulse energy exceeding the critical value, the nonlinear evolution of the wave field markedly differs from the corresponding process in a continuous medium. While the pulse propagates in a discrete medium, its length decreases to values comparable to the scale of the structure and the velocity decreases to zero. The system parameters are determined at which the wave field after the laser pulse termination begins to propagate in the opposite direction in a compressed form. The process of slowing down and stopping the pulse is accompanied by strong radiation losses, so that about a third of the energy of the initial field distribution remains in the final compressed state.

中文翻译：

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离散介质中激光脉冲的自压缩

使用离散非线性薛定谔方程，我们研究了纳米结构波导系统中的激光辐射自作用动力学。结果表明，对于超过临界值的激光脉冲能量，波场的非线性演化与连续介质中的相应过程明显不同。当脉冲在离散介质中传播时，其长度减小到与结构规模相当的值，并且速度减小到零。系统参数由激光脉冲终止后的波场开始以压缩形式沿相反方向传播时确定。减慢和停止脉冲的过程伴随着强烈的辐射损失，因此初始场分布的大约三分之一能量保持在最终压缩状态。