Similar to Wi-Fi , a new concept called Li-Fi is being developed which uses visible light for transmission instead of RF signals. Unlike the RF signals visible light is more focused and concentrated . It is much more faster than WiFi . Researchers at Oxford achieved a speed of 224 Gigabits per second in the lab, which is over 200 times faster than a Google Fiber internet connection.
LiFi has other advantages too – as it uses visible light it cannot penetrate through walls, offering a higher degree of privacy to the users. However it is still at an experimental stage.
Li-Fi was invented by Harald Haas from the University of Edinburgh, Scotland back in 2011, when he demonstrated for the first time that by flickering the light from a single LED, he could transmit far more data than a cellular tower.
Companies and organisations around the world developing this technology
There are many companies and organisations around the world developing this technology:
Fraunhofer IPMS in Dresden, Germany: Scientists of the research area Wireless Microsystems developing Li-Fi technology modules for industry customers, mainly for industrial automation applications.
pureLiFi is a technology company based in Edinburgh, co-founded by Harald Haas and Mostafa Afgani. They introduced the world’s first LiFi dongle at Mobile World Congress in 2016. They have also collaborated with French company Lucibel to launch the world’s first integrated luminaire.
OLEDComm is a French company founded by one of the inventors of LiFi, Suat Topsu. It provides products for indoor positioning and bidirectional modems at 2Mbps able to operate with mass-market LEDs. – San Diego-based LightPointe, known for point-to-point gigabit Ethernet free space optics and hybrid optical-radio bridges, are developing this technology through Firefly Wireless Networks.