Two very recent papers that illustrate the potential of OWC to support Tb/s communications:
1) A Tb/s Indoor Optical Wireless Access System Using VCSEL Arrays
https://ieeexplore.ieee.org/abstract/document/9217158
2) A Tb/s Indoor Optical Wireless Backhaul System Using VCSEL Arrays
https://ieeexplore.ieee.org/abstract/document/9217368