Electrical signalling has beaten off the challenge from optical communications a number of times in electronic systems, but connecting by light may be about to stage a comeback. THE ELECTRONICS industry is good at spawning 'technologies of the future' that seem destined to remain forever in the future. Optical signalling joined the list several decades ago. Although Sit forms the backbone of the Internet, photons have not displaced electrons for shorter distances; attempts to do so have often been met with reversals.
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