"Simulation Based Analysis of 4th Stage EDF Amplifier for Different Doped Erbium Fiber Length & Pumping Power Noise Figure & Gain Optimization"

At present, optical fibre is the only transmission medium offering large bandwidth with low loss communication links. To amplify an optical signal with a conventional repeater, one performs photon to electron conversion, electrical amplification, retiming, pulse shaping, and then electron to photon conversion. Optical amplifiers are mainly classified into travelling wave’s semiconductor optical amplifier, fabry-perot semiconductor optical amplifier, Erbium doped fiber amplifier, Raman & Brillouin fiber amplifiers. The Performance of an Optical Communication system can be improved by the use of EDFA as an Optical Amplifier. Erbium doped fiber amplifier (EDFA) is an important element in DWDM networks. In this paper, we analyzed the performance of augmented gain EDF amplifier systems by enhancing the stages of EDF amplifier & further by variation in pumping power on designed EDF amplifier system. The length of doped fiber in EDFA is also affected. The design evaluates the performance of the network for a given pattern specifies the design accessibility for the speed enhancement. For the present work, we have used EDFA design software tool. The proposed model consists of an input source, isolator, pump source, erbium fiber and WDM coupler. It simulates various characteristics such as amplified spontaneous emission, minimum gain, maximum gain, average gain, noise figure, gain flatness, gain tilt etc. in efficient manner. It confirms the excellent agreement between simulations and results obtained in real EDFA design. And also changing the design parameters on four stages EDF amplifier such as Input Pump Power, doped fiber length the different performance parameters (gain and noise figure) can be optimized without changing the values of isolator, erbium fiber length and WDM.