hello.. can anyone help me to solve my problem. actually i use numerical method (split step fourier method) in matlab to prove the effect of fiber losses, dispersion and non-linearity in optical soliton and also need to compare that result with optisystem. first, since we know GVD modified the pulse in the time domain, the amplitude spectrum of the pulse remains intact, but i cant get the result based on the theory said. for information, i try to look the effect of dispersion by replacing any value of beta2. the typical parameter of beta2 is -20ps^2/km. second, i dont get and see any effect of non-linearity after replacing any value of gamma and try to put the other equation of nonlinearity to get the spectral broadening..the typical parameter= 1.317 .
here, i attached m.file matlab..thank you..
