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“The new technology uses light instead of wires to send information and could allow, for example, the transmission of 8 trillion bits (terabits) per second of information -- equivalent to about 5,000 high-definition video streams -- using the power of a single 100-watt lightbulb.”
The overall bandwidth that such a device would be capable of providing would be dependent upon the number of channels. Currently 12.5 Gb/sec per channel is the limit, and IBM has demonstrated a 24 channel design.