Thank you gaganpreet for your reply.Basically hosni needs the specific values of dispersion that used in fibers he has mentioned.Implementation of these fibers in optisystem is not a question here.i have tried to find these fibers but found other specifications like core size,na,ref. Index etc.but couldnt find values of dispersion.i think you have to check ITU mannual to get the values or specification from some company which manufactute these fibers.