Scientists from the USA demonstrated data transmission at a speed of more than a terabit per second. For this, the researchers used the technology of digital subscriber line which is a telephone communication, and applied it to high-frequency signals propagating through the copper waveguides. The work presented in the journal Applied Physics Letters.
In 1986, John Cioffi (John Cioffi), a Professor at Stanford, along with his students developed the technique of multi-ton modulation signal, which became the basis for the technology is digital subscriber line — for example, with this technology, we have quick Internet access. However, the speed of information transfer is still very limited, and scientists are looking for a more efficient method of data exchange in the framework of the already developed technology. One of the possible directions is the use of high-frequency signals, because the high frequencies allow to increase channel capacity.
Scientists from brown University and company ASSIA, together with John Cioffi, for the first time experimentally tested the performance of digital subscriber line at frequencies around 200 GHz. To do this, physicists have used the copper waveguide with two channels running parallel — this system provides the possibility of transmitting parallel data streams reintervenciisa.