Researchers KIT (Karlsruhe Institute of Technology, Institute of Technology in Karlsruhe, Germany) recently announced having reached a speed of 26 terabits per second over a distance of 50 km using single laser beam, beating the record the world in this field. This DVD is 700 transferred in a second, or 400 million simultaneous phone calls.
Ironically, the difficulty lies in the encoding and decoding of information rather than transmitting the same data. No electronic device is indeed able to present to absorb this amount of data, and the researchers have developed a purely optical to "split" the data stream into smaller packets that will be processed and decoded them electrically.
Encoding side, the researchers used a method conventional OFDM (digital signals are coded orthogonal frequency division, as multiple sub-carriers), similar to that used by ADSL, VDSL, WiFi or DTT. A fast Fourier transform (FFT) to separate the carriers together. In practice, if the exploit is real, it should take a few (tens of) years before the man in the World benefits from such a flow with him ... 
Ironically, the difficulty lies in the encoding and decoding of information rather than transmitting the same data. No electronic device is indeed able to present to absorb this amount of data, and the researchers have developed a purely optical to "split" the data stream into smaller packets that will be processed and decoded them electrically.
Encoding side, the researchers used a method conventional OFDM (digital signals are coded orthogonal frequency division, as multiple sub-carriers), similar to that used by ADSL, VDSL, WiFi or DTT. A fast Fourier transform (FFT) to separate the carriers together. In practice, if the exploit is real, it should take a few (tens of) years before the man in the World benefits from such a flow with him ...
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