A detailed parametric investigation of the modal performance of single-mode, single-polarization vertical-cavity surface-emitting lasers (VCSELs) loaded with a micro spiral phase plate is reported. This work stems from a recent publication, where the structure is technologically implemented and tested. Starting from the actual structure parameters, we investigate by VELM, our in-house fully 3-dimensional and vectorial Vcsel ELectroMagnetic solver, the features of such a novel approach to produce orbital angular momentum modes, in view of next-generation high-capacity optical communications.

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A computationally efficient theoretical approach is used to assess the performance of novel devices with directly emitting optical vortex modes

A new optical backplane solution is proposed for high-capacity ICT apparatus. A modular, scalable and full-mesh bandwidth-upgradable optical interconnection between optoelectronic boards is guaranteed thanks to an optimized layout of standard MM 12-fiber ribbons which divides the overall backplane into several independent optical sub-circuits. The novel automated assembly procedure of fiber ribbons inside sub-circuits with a robotic work-cell is described. System validation of the optical backplane performed with commercially available MM 12-fiber transceivers @10Gb/s proved the feasibility of the proposed solution for future optical interconnections with terabit overall capacity