Set a Record for Speed Optical Communications

Optical solitrony – is “packets” of light waves, which are able to propagate without changing their shape.

In the field of optical communications solitrony may be used to generate optical frequency comb with different spectral lines, which in turn can be used to establish high-speed communications and high channels.

The possibility of implementing such technology was recently demonstrated by researchers from the Institute of Technology Karlsruhe (Karlsruhe Institute of Technology, KIT), works together with scientists from the Swiss Federal Polytechnic University of Lausanne.

Set a record for speed optical communications

And what is most important about this, is that with the help of a new method scientists once managed to get a record high rate of information transfer. Scientists have used optical microresonators of silicon nitride, which can easily be integrated into the chip structure intended for communications technology.

Within the framework of these resonators solitrony continuously circulate, resulting in a wideband frequency combs.

These comb, for whose discovery in 2005 Dzhon Hol and Theodor W. Hänsch awarded the winner of the Nobel Prize in physics, are a sequence of equally spaced spectral lines located at the grid frequency.

Each spectral line can act as a single channel through which can be transmitted to an independent data stream. In their research, scientists from Germany and Switzerland have used two consecutive frequency combs to organize 179 parallel optical communication channels.

The aggregate data rate on these channels was 55 terabits per second at a distance of 75 kilometers. This speed is equivalent to more than five billion telephone conversations or more than two million HD-quality television channels.

And this is the highest rate achieved by optical transmission technology to date.

Finally it should be noted that the technology of using solitronov, microcavities and frequency comb is a new kind of realization of the frequency multiplexing (wavelength division multiplexing, WDM), which is one of the fundamental technologies in optical communications.

This technology allows the simultaneous transmission of multiple independent data streams over a single fiber optic line.

And the fact that all components of the new technology can be placed on a tiny chip crystal, increases the scal-ability of communications systems, which will form the basis of future networks, providing speed of information exchange.

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