Dear Tariq,
I’ve noticed that your connection to the R-SOA is not correct. Please follow the example (Reflective SOA.osd) in the example library for guidance. Also, note that the BW of the MUX/DEMUX AWG is two wide (10GHz) compared to the modulated signal (2.5Gbps) and this will cause more interference at the receiver and during propagation.
Regards,
Ahmad