well once again thanxx alot for your reply Damian..i tried alot but dont know how i keep on doing one or the other thing wrong..The self phase modulation box checked/not checked gives me alot of lot of variation in Q factor..i am not sure whether im doing it right and most probably, im doing it wrong ..i will be really really greatful if you can please send me two files..first one having 10 Gbps OOK NRZ or RZ 32 channel WDM system and the second one having 40 Gbps DPSK 32 channel WDM system..further i want to check their Q Factor performance with and without non linear effects…Please help..Thanxx alot..
regards..
mani