High-speed hybrid multi-mode fiber-free space optics transmission system based on orbital angular momentum multiplexed beams

The modelling of a hybrid multi-mode-fiber (MMF)-free-space-optics (FSO) transmission system for last-mile access with a net transmission capacity of 40 Gbps is illustrated in this work. Orbital angular momentum (OAM) multiplexing has been integrated in the MMF-FSO transmission to augment the transmission speed and spectral efficiency of the system. Successful transmission along 100m MMF and 1200m FSO range is achieved with good system performance.