Optimization of the three stages L band EDFA

In this study, fiber lengths of each stage of the three stages L band erbium doped fiber amplifier (L-EDFA) and the pump laser power are optimized to achieve the maximum gain, the minimum noise figure and the minimum gain ripple. It is obtained on an average 34.7–37.1 dB gain, 6.28–6.0 dB noise figure, and 2.13–2.28 dB gain ripple along all L band for the 980–1480nm pump wavelengths, respectively.