Optical Wireless: With Nanowire Leds Bring Internet Speed Of Light Lamps

For several years, researchers at the Fraunhofer Institute are already working on a new Wi-Fi technology, which enables data transmission with the speed of light and can be installed in conventional light sources.

What already is through fiber optic cable used, namely the transmission of data through light, could be used in future also in local living rooms, on stands or in company.Also the researcher and an expert on semiconductor technology, Franz-Josef Tegude of the University of Duisburg-Essen, is working with his team on advanced light-emitting diodes from Nanowires. Soon, our lamps in the living room could bring not only light, but also super fast Internet. Everything from a version.

Lights Of The Future Bring Even Wireless Internet

To send data packets via a light signal is not new. It was problematic, however, that the infrared waves-based signal, which ensures the transport of the data in fibre-optic cables, represents no visible light. To realize the Internet from the light bulb, the light signals within a billionth of a second must on and will be switched off. Just so there will be a promising encoding. Previous LEDs however are not so quick to switch in the position. Franz-Josef Tegude has developed special Nanowire LEDs which support similarly rapid switching frequencies and in addition also still bright enough light to provide a room with visible light. The new LEDs differ from the structure produced by conventional light-emitting diodes. It no longer is rebuilt, but Stamper layer by layer from the inside to the outside LED along the wire.

What sounds relatively simple is the result of years of work, which should pay off at the end anyway. The application spectrum is this diverse nature. The researcher assumes that the technology, for example, in the form of Wi-Fi bearing bulbs, will come within the next five years on the market.

How It Works

The information, so the Internet is transmitted bit by bit due to the fast light movements. This is done according to the well known binary code principle 0 and must be connected to a modulator 1. use the powerful LED or the lamp extant from several LEDs. The modulator itself receives classic cable the data streams. To receive the transmitted signal, a recipient is required, for example, on your notebook or PC. This occurs in the form of a photo diode. Again, the photo diode is capable of the light signal into electrical impulses to translate, that the computer can read the equipment according to beziehunsweise.

Future Areas Of Application

What are the advantages but promise the new lamps? Now to the one who remains a bulb, LED that us will still accompany in future. The small light-emitting diodes consume little energy and are an indispensable asset at times of the energy revolution. On the other hand, the production of LEDs is quite cheap, what pays off again also positive for the consumer. The Wi-Fi-lamps, inter alia with regard to the security of the data bring concrete benefits. Finally the Wi-Fi from the ceiling can be tapped very difficult up not at all from the outside. It is connected but at the same time but with limitations, because the transfer to the respective receiver works only with direct “sight”.Items in the way and also the rooms walls shield the Wi-Fi. Unlike modern routers, the range is very limited. However, it is also hold that the Wi-Fi from the ceiling sets off no scattering signals.Thus, the technology is everywhere there can be used, where radio waves are undesirable, as in airplanes or hospitals. Also measuring would be another application area. Each booth could get an own Wi-Fi lamp and thus own Internet. Most recently the technology could be used also as optical fibres made of plastic. A replacement so that conventional fiber optic cables with the advantage that the new material can be folded and is could be thus much better set. Franz-Josef Tegude stressed that especially the Nanowire LEDs combine easily with the plastic fibers can be.

Technology Needs To Be Further Developed

But a few years will pass until the maturity of the market. The researchers are also everyday receivers that can also read the light signal. So far is the receiver diode, which must be installed on the computer, for example, are still as big as a DIN A4 Blatt.Das should in the future much more compact.

The developments in the field of the Visual light communication are a very exciting field, which we will continue to monitor. The “flickering” within a billionth of a second light übirgens moves in an area that the human eye can perceive not. The switch-off processes and we get nothing.