Basically, the only new principle involved is that instead of de-serialized and subcarrier modulated data modulated onto 2.4GHz sinewave and emitted from antenn

Basically, the only new principle involved is that instead of de-serialized and subcarrier modulated data modulated onto 2.4GHz sinewave and emitted from antennae as electrical field changes, it is now sent as changes in light level on subcarrier frequency. Or more simply, maybe it could be done in YouTuber style by a light-emitting diode on Tx antenna port and a photo-sensitive diode on Rx antenna port? Switching speed of Tx side LED could become the limiting factor in that case.