Heres an intresting article. Its instructions how to make a transmitter and reciever that uses a laser beam instead of radio frequencies.

Using a simple laser pointer, a few misc parts, and about 15 minutes, you can make a simple laser communicator that converts a sound source into light that travels across a room, and back into sound with very little quality loss.

This is something I want to do. I just don’t have the skills. Imagine using something like this to send data from once source to another. Just convert the 1s and 0s to sound and transmit them, then convert them back to 1s and 0s. Could work.