Multicore Fibers and Single Source Transmitters

With the introduction of space-division multiplexing (SDM), the world has seen an explosion in reported records of data transmission throughput, such as the accomplishment of crossing the 1 Pbit/s border in 2012. As cost and energy consumption are becoming limiting factors in high-capacity systems, using fewer lasers with less energy consumption grows desirable and frequency comb based single source transmission has attracted great research interest.

Combining photonic-chip based frequency combs, and multicore fibers, with have demonstrated capacities of up to  661 Tbit/s in a 9.6 km, heterogeneous 30-core fibe.


Orbital Angular Momentum Modes for Communications

Space-division multiplexing (SDM), is a possible solution to the nonlinear limit, also known as the "capacity crunch", which is the maximum speed possible in current optical fibres. Using advanced fibres, supporting several spatial modes, a scheme known as mode-division multiplexing, can be used to increase this capacity limit. A possible set of modes is the orbital angular momentum (OAM) modes, which exploits twisted light to obtain orthogonal communications channels over kilometer length fibers, without requiring energy demanding MIMO processing.

18 JUNI 2018