M3 inject/recover 3 modes in a single Few Mode Fiber (FMF). The M3 modal MUX/DEMUX is a device that enable to inject/recover 3 different signals coming from 3 different fibers in a single Few Mode Fiber (FMF), where each signal is carried on a spatial mode which is orthogonal to the others. those modes are called LP01 LP11a and LP11b. KYLIA can provide modal MUX/DEMUX made with its FMF or adapt its product to customer’s FMF. We also propose a mode characterization service for any FMF.