强非局域介质中的椭圆高斯型损耗空间光孤子

应用解析的方法研究了傍轴椭圆高斯光束在含小损耗椭圆对称强非局域非线性介质中的传输特性，得到了光束各参量的演化方程、束宽的演化规律和2个临界功率。当椭圆对称强非局域介质的响应函数满足一定条件，这2个临界功率相等；当介质损耗足够小，初始功率等于这一临界功率时，傍轴椭圆高斯光束在传输中，其束宽保持缓慢展宽，可以得到椭圆高斯型损耗空间光孤子。

Elliptical Gaussian Lossy Spatial Soliton in Strongly Nonlocal Media

The propagation of elliptically Gaussian beam in small lossy strongly nonlocal media is discussed with a analytical approach.A set of optical beam parameter evolution equations,the beam width evolution law and two critical powers are obtained.In the case of small loss and the response function satisfies a certain condition,the two critical power equalities and a elliptically Gaussian lossy optical spatial soliton with beam width slow diffraction is found when the input power equals the critical power.