C-band coherent transmission at 1.6 TB/s over 3.5 km of OM4 fiber using a fundamental mode operation

We demonstrate the highest, to the best of our knowledge, capacity obtained for an OM4 fiber reaching 1.6 Tb/s for 3.5 km of OM4 fiber. The result is obtained using a highly selective modal multiplexer exciting the LP 01 mode and a state-of-the-art coherent transmission setup operating in the C-band. The results indicate that there is no need to replace legacy optical fibers to increase their capacity, which may be an extremely important factor when considering the costs of upgrading existing networks.