I. Introduction
EDFA is a very attractive optical amplifier in optical applications. For a gain medium it uses a doped optical fiber to amplify optical signal. EDFA has certain special features like low noise, large bandwidth, small splice loss and high gain. The pump lasers and the signal which is to be amplified are multiplexed into doped fiber and the amplification of the signal takes place by interaction with doping ions [3]. EDFA amplifies data channel with the highest data rates.