In this paper we present a Coherent Optical Multiple-Input
Multiple-Output (COMIMO) communication system and its ability to
exploit the inherent information capacity of Multi-Mode Fiber
(MMF). COMIMO technique is a promising approach to unlock the
information capacity of MMF as it ensures the necessary diversity
for practically any fiber length. When exceeding the
bandwidth-length product of the link, MIMO adaptive equalization
can be used to mitigate inter-symbol interference (ISI).
Furthermore, COMIMO link provides additional security in the
physical layer that complements encryption.