Scientists send data with 1,125Tbit / s




Scientists have been able to send data with 1,125Tbit / s, 12.5 percent faster than it has been demonstrated until now. This was done by making use of a ‘super channel’ with a total of fifteen channels to carry the data.

The idea of these super-channels is not new, but it is the first time that it has been able to send data to more than 1Tbit / s to a single receiver, claim scientists at UCL University in London in a paper that appeared in Scientific Reports. The researchers make the comparison that such speeds make it possible to download all episodes of Game of Thrones in a second.

In the experiment, the maximum signal-to-noise ratio, or SNR, of 24dB of a state-of-the-art transceiver taken as a basis. “The key to maximize that can be reliably controlled over an optical fiber, the number of bits, is to make the modulation format and code rate to optimize the simultaneous, based on the SNR of the receiver,” the researchers write. The code rate is the part of the data stream which is actually usable.

The team trying to use fifteen different carriers for the transfer of data. Each channel carried a signal of a different wave spring, which was modulated by using the 256QAM format. The channels were bundled into a super channel for a single recipient. Higher QAM formats use would not lead to higher speeds through the current limit of 24dB SNR, but improve the subsystems of transceivers and get better signal-to-noise ratios at your fingertips, this would be an option.

The study was designed to see if the making of super-channels is a good way to boost the speed of compounds in the future. That is far from certain, in this study the transmitter was linked directly to the recipient. The scientists now want to test the impact on the system’s distortion of the optical signal, which occurs during transmission over long distances.


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