Hi mohamed
nonlinearity on optical fiber I switch off.
I use 32 channels using optical gaussian pulse generator format, then on optical link using smf fiber then SOA smf and EDFA amplifier amplifiers, and when I vary powernya if using power -2dBm will get Q factor better than 2dBm power. and I read some papers showing if the greater the power will result in a better q factor value, but i am the opposite .. so i feel confused now hehe
