Hi Lisa,
In your design in each case you are multiplexing two wavelength or frequency but I have seen that same data you are applying same data to both the wavelength because you are using fork for the both the measured laser component. That means same data transmitting in different optical carrier, what advantage you are getting for that please let me know. and same data you are applying (because you are using fork) ie. copying the same data to two wdm add and drop component. can you refer me the paper which you are trying to realize. I am a bit confused. Thanking you.
regards,
Dhiman