Remember reading an article a while back where they said they did it. Can’t find it but never really explained how it is even possible or how or why someone said look light lets put some data in itl
you can pulse it or encode it changing color. this is nothing new.
Using light to communicate has a pretty long history, you just blink lights in a pattern, same as electric signals just without a wire, I mean you can use a “wire” to make light go further (optical fiber), you send zeros and ones by turning the laser on and off, that’s all, optical audio connections came to the market in 1983, the undersea internet cable are optical etc, you can blink a flashlight in Morse code and it’s a light based communication, swap flashlight with a laser and you have “an information in a laser beam”, that’s all, you want to send more info faster just blink faster
