A new fiber-optic system can carry 800 gigabits of data per second, a big step up from top speeds of 100 or 200 gigabits in today’s data centers. Ciena’s new WaveLogic 5 Extreme system can transmit 800 gigabits of data per second on a single wavelength of light through up to 200 kilometers of optical fiber. The company says it will begin deliveries by year-end.