Our bidirectional VLC experiments demonstrate
for the first time that the dense optical
WiFi communication scenario, still considered
visionary earlier, can now be realized in a reasonable
indoor setup using commercially available
hardware. We exemplarily used red LED
sources, as shown on the right of Fig. 5, for better
visualization of the bidirectional data transmission.
In fact, any other high-power LED
could be used as the light source regardless of its
color. In the near future, we expect that more
powerful OFDM chips will be available. As our
VLC components already provide the necessary
analog bandwidth, there is a significant potential
for further increased data rates.