Pulses of darkness let digital data travel farther

时间:2017-06-24 08:01:01166网络整理admin

By Colin Barras OPTICAL fibres can carry digital data for much longer distances if it is encoded in pulses of darkness, rather than pulses of light. To exploit this, Steven Cundiff, a physicist at the University of Colorado, Boulder, and colleagues have developed a device that has been dubbed the dark laser. A standard laser can send out millions of picosecond-long light pulses each second, separated by longer dark intervals. The dark laser operates in reverse: