SDM transmission of orbital angular momentum mode channels over a multi-ring-core fibre.

ABSTRACT: Spatial division multiplexed optical transmission over a multi-ring-core orbital angular momentum (OAM) fibre is reported for the first time. The seven cores in the fibre each supports OAM modes belonging to mode groups (MGs) of topological charge |l| = 0-4. The MGs of |l| = 1-4 each contains four near-degenerate OAM modes that carry the combinations of opposite orbital and spin angular momenta. The weak coupling between these higher-order MGs as well as between the cores enables the simultaneous transmission of 56 OAM mode channels (two MGs per core of the topological charges |l| = 2 and 3) over the 60-km span, while only requiring modular 4 × 4 multi-input multi-output (MIMO) signal processing to equalize the mixing among the four mode channels in each MG that are st

SUBMITTER: Zhang J 

PROVIDER: S-EPMC11501910 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature