Really cool thanks for the link. I have experimented a lot with the OOK modulation and open-air laser wireless communication. It can be done just using visible light LEDs as detectors and small laser diodes, they just need to be of the same color. A free-space optical link can be built in minutes, see <a href="https://github.com/gioblu/PJON/tree/master/src/strategies/AnalogSampling" rel="nofollow">https://github.com/gioblu/PJON/tree/master/src/strategies/An...</a>
Free Space Optical Communication(FSOC) enables projects like Taara[0] from the Alphabet's X. This communication enables great internet infrastructure around Africa, especially coupled with already existing Telecommunication companies Fiber Optics(Project Equiano).
[0] <a href="https://x.company/projects/taara/" rel="nofollow">https://x.company/projects/taara/</a>