计算波导中四波混频效率，考虑线性损耗、自由载流子吸收损耗、双光子吸收损耗-FWM efficiency in silicon waveguide

基于四波混频效应来实现全光逻辑门，有时域谱和频域谱，基于四阶龙格库塔法求解。(All optical logic gates are realized based on the four wave mixing effect, and sometimes the domain spectrum and frequency domain spectrum are solved based on the four order Runge Kutta method.)

对光纤中的四波混频进行仿真计算，内含注释。(Four - wave mixing in optical fiber is simulated)

依据《SUPERCONTINUUM GENERATION IN OPTICAL FIBERS》而来，SPM,XPM,FWM,拉曼效应，利用分步傅里叶法和龙格库塔方法来求解广义非线性薛定谔方程