Light Fidelity: “Speed Of Light” By The LED Data Communication

LiFi makes data control-LEDs and the Stanford University makes LEDs in turn having.

We live in times of extremely fascinating? Maybe the Internet as well as the phone fixed network connection from the TV socket comes also with you, or “Films fly ‘s” invisible over the air to the laptop? It is normal for our kids while we adults sometimes amazed at how quickly all of these things have changed.

We would have back then even remotely understood like a fax machine, it works… but not everything must understand yes finally. You can use all of these technologies simply and comfortably main thing. And we will also in this new technology, which at first glance looks a bit like mumbo jumbo, certainly: data transfer via visible light, also called optical wireless circumscribed, it is at the time worked in several places.

Because if you want to do really fast data transfer, then cable are not the best solution now time.The Heinrich Hertz Institut (Fraunhofer Society) in Berlin or at the University of Edinburgh, where Professor Harald Haas is working on the applicability of the VLC technology, is researched diligently.

VLC is available in this case Visual light communication (and not for the popular digital media player, which can handle any format). But actually one can get used right on the label, the probably the mass most compatible, because will be obvious and therefore the enforcement ends: LiFi!

This light fidelity (literally translated: light natural loyalty) works with the good old light bulb, we just step by step make commercial masters, of course, but with the latest generation of LED light sources.

You can use the data transfer capacity of such LED night lights featured on, however a few a few additional parts are needed. These additional parts turn that LED from a pure light source in a data transfer device, a light Morseschreiber of kind of.

The special component called switches that easily LED and off and takes over as the binary language (light on / off light) of LiFis modulator. We must once again thank our pitiful human reflexes or the inertia of the human eye, as a visible for us, constant flicker would never prevail – and very quickly on the rubbish of the history of technology land. Because the eye but does not see this fast light modulations, the future for fast and lossless data traffic is according to experts in the LiFi.

A simple photodiode which absorbs the light serves as a receiver. Electronic decodes this information and converts it into electrical impulses. However, there is a weak point on the route of transmission of photo diode LED: device something in the light path between lamp and photodiode impaired that the transfer of course.

Transfer rates, however, are downright intoxicating unblocked transfer way: Harald Haas has already demonstrated that transfer rates of 10MBit/sec are today no problem. But he assumes that, in the future, speeds of up to 1GBit/SEC will be the norm.

All researchers not have achieved this goal so far, but several research groups are on the way there. Haas himself is planning the marketing of a LiFi system (VLC D-light), which will be in the coming year in the trade, which has guaranteed transfer rates of 100 Mbit/sec. It is already today much faster than most can manage broadband connections.

At the Berlin Heinrich reaching Hertz Institute already 500MBit/sec transfer rates – with normal (but equipped with additional modules of course) white light LEDs. Other research teams, for example, of the University of Oxford, working with parallel data transfers via LED orders in colored light, where more or less different data channels describe the individual frequency ranges of light.

Yet one step further people from the Stanford School of engineering are now gone, that’s committed to the task, to replace the previously fastest light transmissions (via laser) in super computers. Also by LEDs-but are the Stanford led from the size here located in the Nano range, because they after all on-chip used and a new generation of motherboards to justify.

You pay at least the same fast transfer rates like laser – but with a fraction of the energy costs (and also only a small part of the cost). Up to 10 billion bits per second transmitted with these Nano-LEDs, the trick is the special type of LED tiny: Unlike other LEDs (as described above) they are Mono mod, that is to say, they emit light in a band only. Similar to laser. They consist of tiny dots from Indium Arsenide, used under power and whose light output can be bundled.

Sounds like a crazy engineering dream, but just to be tough reality.