Optical ground wire

An optical ground wire is like a big, strong rope that goes along power lines to help keep them steady and safe. But it's not just an ordinary rope - it has really thin wires inside that carry light instead of electricity! This special light is used to send important information from one place to another, so people can make sure the power lines are working properly and fix them if they're not. Think of it like a secret message sent between friends, but instead of words, it's made of light traveling through a special rope.