Performance evaluation and optimization of dual-stage L-band EDFA utilizing short gain medium

In this paper, a high sensitivity dual-stage L-band erbium-doped fiber amplifier (L-EDFA) has been optimized using different performance parameters such as gain and noise figure for different erbium-doped fiber (EDF) ions concentration, EDF pump powers, input signal power pumping wavelengths, power and directions. It has shown that when the optimized parameters are used, the dual-stage L-EDFA provides better performance of gain and noise figure using short gain medium. The amplifier structure is able to achieve high gain of 50 dB with noise figure less than 4 dB using 7 m of EDF.