Design of parabolic refractive index 2 mode-EDFA with ultra-low deviation in gain and noise figure across 2 × 16 channels for MDM-WDM system

We propose a design of two-mode erbium doped fiber amplifier (2M-EDFA) for mode-division multiplexed based wave division multiplexed (MDM-WDM) hybrid system. 2M-EDFA systems are proposed that are characterized by both low gain and low noise excursion. Implementation of novel matrix branching method with simultaneous EDFA multi-parameter optimization technique, results in 2M-EDFA systems producing a gain exceeding 24 dB for each of the 16 channels in both modes. The gain excursion and noise figure excursion for 2M-EDFA are 1.40 dB and 0.54 dB respectively. In comparison, for 2M-EDFA the corresponding values are 0.95 dB and 0.59 dB respectively. 2M-EDFA gives improved performance over 2M-EDFA due to the high population inversion maintained by 1480 nm.