Space division multiplexing (SDM) based four mode erbium doped fiber amplifier (4M-EDFA) system is explored with πΏπ01;980 ππ and πΏπ01;1480 ππ pump power respectively. Main objective of this work is reduction in inherent differential modal gain (DMG) and differential spectral gain (DSG) between amplified signal modes πΏπππ (πΏπ01; πΏπ11; πΏπ21 and πΏπ02) while maintaining high modal gain. Differential modal noise figure (DMNF) and differential spectral noise figure (DSNF) parameters are introduced to quantify amplified spontaneous emission (ASE) impact in 4M-EDFA980 ππ; 1480 ππ system. A modified erbium ion inclusive overlap factor (ππ π) and more decisive DMG related differential modal overlap factor (DMOF) and DSG related differential spectral overlap factor (DSOF) parameters are extracted using coupled mode equations. Calculations reveal ππ π favourably high in 4M-EDFA980 ππ than in 4M-EDFA1480 ππ system. However, calculated DMOF and DSOF values are also unfavorably high in the former than in latter. Thereby, 4M-EDFA1480 ππ is further explored for the simultaneous reduction in DMOF and DSOF values. Modified erbium doped profile (MEDP) 4M-EDFA980 ππ;1480 ππ system is simulated with erbium ion profile variants: uniform, ππππ£(π) and ππππ‘ (π) in the order of their improved performances. ππππ£(π) is extracted from inverse sum of normalised signal intensities related function and subsequently unique ππππ‘ (π) profile is proposed that satisfies reasonably differential modal gain equalization criteria. In 4M-EDFA1480 ππ system at 1550 nm wavelength respective values with ππππ£(π) and ππππ‘ (π) for average modal gain is 24.05 dB, 24.17 dB; DMG is 2.4388 dB, 0.3624 dB and DMNF is 2.6862 dB, 0.3278 dB.Β