Abstract: The aim of this paper is to analyze the performance of Erbium Doped Fiber Amplifier (EDFA) system by comparing the gains and noise figures of different commonly available EDFAs. The four stage enhancement circuit has been designed and simulation studies for different types of EDFAs are compared by replacing different EDFAs in the four-stage enhancement circuitry of EDFA in WDM configuration. Further, for the EDFA with comparatively better gain and noise figure spectrum, the pump powers are varied and a comparison of gain and noise figure with respect to wavelength is carried out. Finally, the Eye Diagram and Min BER has been generated for the best Pump Power performance.