Multidimensional Modulation in Optical Fibers

This paper proposes a novel multidimensional modulation in long-haul optical links. This model, starting from the general 4-Dimensional space (signal space), exploits its two derived physical 3-Dimensional spaces of the polarization and phase. In particular, our main proposal is the building of a unique constellation derived from the union of two symmetric constellations in the two above-cited spaces. In this way, with the same performances of existing systems, it is enhanced the representation and the visualization of the constellation independently from the number of dimensions and it is opened a way to possible physical layer security applications and capacity (in terms of throughput) improvements.