Abstract: The goal of this review paper is to get the analysis of an erbium doped fiber amplifier (EDFA) for dense wavelength division multiplexing (DWDM) system. They analyzed that the output peak power is increased many times and optimized by using EDFA. The performance of single & hybrid optical amplifiers using the output power, BER, eye height and Q factor. The system is simulated using Optisystem software to achieve gain flatness, BER (Bit error rate), and noise figure of EDFA through optimized fiber analyzed separately. The simulation results showing length and pump power. The system is simulated using Optisystem software to achieve gain flatness, noise figure of EDFA. An efficient flat gain characteristic is demonstrated using a two stage DRA-EDFA configuration. The performance of the DWDM system using both hybrid fiber amplifier configurations has been quality factor (Q), eye diagrams, signal strengths and BER at various receivers for BER of 10-9 at 1479 nm to 1555 nm bandwidth. The performance of a 64 channel DWDM system for different modulation formats, channel spacing, line widths of optical sources and different fiber lengths has been observed. They analyzed the EDFA adaptive gain control effect over a cascade amplifier in a DWDM system & the performance of optical cross connect in DWDM system under the influence of intra-band crosstalk.
Keywords: Erbium Doped Fiber Amplifier (EDFA), Erbium Doped Fiber (EDF), Dense Wavelength Division Multiplexing (DWDM), Doped Fiber Amplifiers (DFAs), Gain Flatness (GF), Noise Figure (NF), Adaptive Gain Control (AdGC), Multi Core-EDFA (MC-EDFA).