HI JYOTI
I just checked osd file of your’s…You have basically created some sort od add/drop block and instead of using the BER analyzer you might use optical spectrum analyzer to view the waveforms of the signals on each side of the so created module…which in my opinion is the right thing to do because what i understand here is that you are adding and removing a particular frequency which can be visualized rather than measured…but u can decide because u know the applications..i hope wil be helpful.
Thanks & regards