To maintain a stable connection at 301 Tbps, the researchers created two devices called "optical amplifiers" and "optical gain equalizers." (Image credit: MirageC via Getty Images) Scientists have achieved fiber-optic data transfer speeds 1.2 million times faster than the average fixed broadband line by tapping into a previously unstable transmission band for the first time.The researchers hit a rate of 301 terabits per second (Tbps) — equivalent to transferring 1,800 4K movies over the internet...