艾里-高斯光束在光折变介质中的孤子脱落

Soliton Shedding from Airy-Gaussian Beams in Photorefractive Media

以非线性薛定谔方程为理论模型,采用分步傅里叶方法研究了光折变介质中艾里-高斯光束的传输特性。结果表明:满足一定条件时,光折变介质中会形成周期振荡的空间孤子;介质的非线性系数越大,形成空间孤子所需的传输距离越短,孤子的振荡周期越小;当艾里-高斯光束的初始入射功率在一定范围内时,光折变介质中才会形成稳定的空间孤子;在空间孤子形成时,由于局部能量竞争,会出现光束分裂成丝现象。此外,还研究了微噪声扰动对艾里-高斯光束在光折变介质中传输稳定性的影响。

Starting from the nonlinear Schrodinger equation and by means of split-step Fourier numerical simulation,we study the propagation characteristics of Airy-Gaussian(AiG) beams in a photorefractive media. The results show that a specific set of parameters can result in soliton with periodic oscillation in the photorefractive media. The bigger the nonlinear factor is, the shorter the distance required to form soliton is, and the smaller the oscillation period of the soliton is. When the initial incident power of the Airy-Gaussian beam is within a certain range, the stable soliton can form. In the process of soliton formation, local energy competition leads to beam splitting. In addition, we also check the stability of the beam by perturbing the initial Airy-Gaussian beam.