In 1880, Alexander Bell was able to transmit sound on a beam of light on a device called the Photophone. Due to the restrictions of his time, the Photophone wasn’t a huge financial success, but it was a technological marvel all the same. It transmitted the world’s first optical message 213 meters between two buildings. You can see from the hand drawn images of Bell’s Photophone really how vintage the technology is. It wouldn’t be till the 1970s when advancements in fiber optics would take place to make fiber optic cables capable of sending long distance and stable messages. This would eventually lead, of course, to the cables we have today.