Basically, yes. You flash the light, and that’s information.
What’s important about fiber optics is that they can have a lot of signals going through them at the same time, without mucking each other up. The first way is to put in multiple colors of light, with a splitter for each color at the end. More advanced than that, you can control which direction the light is waving, and get a bunch more signals *for each color.*
So while each individual signal is relatively easy to generate, the combination of all of them is a LOT of data. A new record was set earlier this year of a **peta**bit per second, through one piece of glass.
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