Combined SDM and WDM transmission over 3 x 3 Coupled-Core Multicore Fiber

We experimentally demonstrate transmission over a novel multicore fiber with 9 cores arranged in 3 groups of 3 cores, such as strong coupling occurs within the groups and weak couplings between groups. We transmitted over 2000 km in a single group and 200 km when all cores are used. low-loss 3D waveguides are used as couplers