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NEC Corporation (NEC) has demonstrated 1.15 terabits/s (trillion bits per second) ultra-long-haul optical transmission over 10,000 kilometers using optical superchannel technology.

This is the first instance that a terabit/s channel generated from a single laser source has been transmitted over such a distance. The results demonstrate that practical high-capacity transmission for transoceanic communication can be achieved using cost-effective superchannel technology, NEC said.

Optical superchannels allow for multiple signals to be transmitted at the same frequency, following the principles of orthogonal frequency division multiplexing (OFDM). This enables efficient equipment and bandwidth utilization.