高斯光束在对数型非线性介质中的传输特性

Propagating characteristics of Gaussian beam in logarithmically nonlinear media

根据对数型非线性介质中高斯光束的束宽和波阵面曲率变化所满足的耦合方程 ,采用数值计算对高斯光束的传输特性进行了详细的分析。结合相图分析了高斯光束在不同初始条件下束宽与波阵面的变化情况。利用力学类比 ,讨论了高斯光束在传输过程中形成的对称呼吸模式与不对称呼吸模式的空间孤子。

Numerically solving equations governing the variations of the beam size and the curvature of wave front in the logarithmically nonlinear media (LNM), the propagating characteristics of Gaussian beams have been described in detail. With the aid of phase diagram, variations of parameters of Gaussian beams have been analyzed for different initial parameters. Using methods adopted in mechanics, the solitons of symmetrical breath mode and non symmetrical breath mode in propagation of Gaussian beams have been discussed.