Sorry to interrupt but i suggest wdm power of 10 dBm is too high. major difference in edfa and Raman amplifier outputs stems from pump frequency . u may use power meter at output of amplifier both EDFA and Raman. difference in output will suggest you if it is matter of meeting minimum power requirements. next you use optical spectrum analyzer and WDM across amplifier again in both cases of EDFA and Raman. it will help you analyze problem area is it low signal availability in case of Raman or increased noise. accordingly you may vary it pump frequncy tuning.i hope it helps.