光孤子脉冲对生产，共4个文件，Solitonpairs.m为主文件(Optical soliton pulse pair production, a total of four files, Soliton pairs. m as the main file)

差分迭代法和虚时间法求解薛定谔方程；克尔非线性方程光孤子解；(Solution of schrodinger equation by difference iteration method and virtual time method;Kerr nonlinear equation optical soliton solution;)