experimentally demonstrate an EDFA, which supports four mode groups. The measured
differential modal … Using an erbium doped fiber with the optimized doping profile, we
experimentally realize the gain equalized FMEDFA, which supports up to four mode groups,
by using the 980 nm pump in LP01 mode. The gain ripple of the four mode groups is less
than 3dB within the C band, and the average modal gain can reach 18dB when the DMG is …