Data transmitted at 255Tb/s over a single strand of fiber

Researchers in the US and Netherlands have managed to transmit data at 255Tbps across a single strand of fiber cable over a kilometer, about 2,500 times faster than any commercial fiber. They used a so-called multicore cable with seven separate channels, but the hardware alone didn’t account for the speed. They also squeezed 50 carriers down the seven cores, cranking each up to 5.1 Tbps using “spatial multiplexing.”.