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Optical Labs Set Terabit Transmission Records


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Researchers at Japan's National Institute for Communications Technology sent 172 terabits per second through a single multicore fiber.

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Researchers at Japan's National Institute for Communications Technology (NICT) were able to send 172 terabits per second through a single multicore fiber.

The NICT design, called close-coupled multi-core fibers, features cores that are so close to each other that the signals intentionally couple with each other.

Meanwhile, researchers at Nokia Bell Labs reported a single-stream data rate of 1.52 terabits per second—nearly four times the 400 gigabits per second achieved by the fastest links currently used in data centers.

The Nokia team used a new silicon-germanium chip to achieve the record single-carrier transmission rate.

The digital-to-analog converter generated 128 gigabaud at information rates of 6.2 bits per symbol for each of two polarizations.

From IEEE Spectrum
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