利用变分方法,得到了Snyder-Mitchell模型的旋转空间调制涡旋光孤子的近似解析解.在传输过程中,这种光孤子具有可观察的旋转特性.在一定的条件下,旋转的空间调制涡旋光孤子将退化为圆对称的涡旋光孤子.
In strongly nonlocal nonlinear media,the evolution of the optical beam is governed by Snyder-Mitchell model. By applying the variational method,we obtain an approximate analytical solution of Snyder-Mitchell model,i.e.,the rotating azimuthon,which has an inherent rotation. Under certain conditions,the rotating azimuthon can be reduced to the radially symmetric optical vortex soliton.