Dutch set world record for fastest infrared data transmission through air

Scientists from the Eindhoven University of Technology (TU/e) have installed a wireless infrared link over a distance of 4.6 km and transmitted data at a speed of 5.7 Tbit/s. This is the highest wireless optical transmission speed in urban conditions, which can find valuable practical applications. For example, for wireless connection to existing 5G and 6G antenna networks in the absence of cable infrastructure and more.

Image source: Vincent van Vliet

The high-speed connection was established between the TU/e ​​campus in the north and the High Tech Campus (HTC) in the south of Eindhoven (originally built by Philips). Using advanced optical antennas developed by Aircision (a local telecommunications equipment supplier), the system uses so-called free-space optical communication (FSO). This method transmits data using focused infrared beams, providing ultra-fast, interference-free wireless communication without relying on traditional cables or radio signals.

However, infrared airborne communication channels, unlike radio channels or wired optical lines, are still subject to interference and especially to environmental influences. Therefore, optical infrared communication is not practical for transmitting data over long distances, as well as in cases where communication must not be interrupted under any circumstances. Thus, high-speed infrared airborne channels are justified for transmitting data over distances of several kilometers and in combination with other, more reliable communication channels.

It should also be understood that to create such a channel with a record data transfer rate, it is necessary to use rather complex and expensive equipment with a beam focusing system and light reception at the data receiving point. In their work, the researchers used a set of scientific and testing equipment at the university designed to test communication technologies. For mass implementation, a much simpler and cheaper solution is needed. For example, compact – only 13 mm high – infrared transceivers developed by Alphabet’s subsidiary Taara. But that will be another story.