Hello Abdollah Gholami
Welcome to optisystem forum,I would suggest you to first go through the optiwave tutorials as there are a co-simulation option of the spice file with optisystem.You can save the file simply by save option.Then the different files with extension .sp etc appear on the location you saved file.You can use this files in optisystem co simulation spice component to use this in optisystem for further work.Visit the links i have given below for overview of optispice and working
https://optiwave.com/resources/latest-news/new-version-optispice-5-0/