Hi! Asif
Your system works fine and you made it by considering all the technical values needs to set for the several components such as Fbg,Edfa etc.The only thing i have corrected is just inserted a loop control for you each transmission subsystem consisting of smf ,,fbg and edfa.your system gives Ber of 10^-10 after 8 loops which distance is equal to the subsystems attachrd by you.Now one loop consisting of smf 100 km edfa 20 dB and smf then FBG.
Check the attached file