Mode-division multiplexing allows to increase the capacity per fiber beyond the limits of single mode fiber systems. JCMsuite has been used to numerically investigate gain equalization for amplifiers in such systems. Step-index fibers as well as graded-index fibers have been investigated.
S. Jeurink, et al. Optimization of the Erbium Doping Profile in Erbium-Doped Fiber Amplifiers for Mode-Division Multiplexing. IEEE Proc. Photonic Networks (2018).