Li-Fi, or Light Fidelity, is the most exciting innovations of the 21st century. The technology uses light to transfer data at breathtaking speeds, as opposed to Wi-Fi which instead uses radio waves. Scientists are able to achieve a speed of up to 224 GB/sec using the Li-Fi technology. It’s just like downloading 18 movies of 1.5 GB each in just a second. Real world tests conducted by Velmenni, an Estonian startup company, garnered a maximum speed of 1GBps, 100 times faster than the conventional Wi-Fi. With this technology, everyone can now download 4K videos in seconds and avoid long buffering times.
How Li-Fi works
Li-fi works by transmitting data in a binary way using light. It also creates a network using the visible light spectrum as opposed to Wi-Fi which uses radio waves. Data is transmitted by means of bulbs which is capable of producing rapid and imperceptible blinking, which yields in an even faster method of data transfer.
However, it is not the first time we used light for transferring data. Fiber optic cables use the same principle: data is coded into light, and then it is transferred along the cable using a series of internal reflections. With this technique, data transferred into fiber optic cables are way faster than their conventional and copper counterparts. It is because the absence of heat loss or resistance, making it more efficient and stable.
Li-Fi was first invented by Professor Harald Haas from the University of Edinburgh back in 2011, but it’s now being tested outside the lab.
Although LED lights will need to be on for the technology to work, LEDs can be dimmed or even switched off and on at very high rates. As previously mentioned, this will be imperceptible to the naked human eye. LEDs can also be dimmed so low that the light emitted is far below that which the human eye can detect. This would still allow enough light generation to transmit data. Direct light of sight is also not necessary. You can still achieve decent speeds of around 70 Mbit/s even with just the reflected light off walls and other surfaces.
Li-Fi can be also the solution to a potential spectrum crisis for Wi-Fi as announced by the US Federal Communications Commission. Light Fidelity, on the other hand, has almost no limitations on capacity at the present time. The visible light spectrum is 10,000 times larger than the entire radio frequency spectrum, which is handy.
As of now, Li-Fi is actively developed and trying to take the leadership of this new innovation. Some of these companies are:
– PureLiFi, as previously mentioned they are the main company in this field. They are also developing Li-Fi luminaires with the French company Lucibel.
– VLNComm is the main startup company in U.S. These guys are being funded by the US Department of Energy and National Science Foundation.
– OLEDComm is a French company working on LiFi. They have some products for indoor positioning.
– LightPointe, who are more familiar with point-to-point gigabit Ethernet Free Space Optics and Hybrid Optical-Radio Bridges. Despite this, they are venturing into this potential market.
However, every technology has its own pros and cons. Li-Fi cannot travel through walls as visible light cannot travel through walls, opposed to Wi-Fi. LED bulbs also need to be placed throughout the area to provide a vast area of connectivity. These bulbs should also be powered on 24/7 to provide the same connectivity offered by Wi-Fi routers. Lack of lighting can also be a dead spot for Li-Fi internet connection.
Human kind’s ingenuity especially the past uses for light to provide means of communication has been taken to the next level with this technology. The inevitable combination of the digital world with the principle of light manipulation to transmit information seems, for all intents and purposes, to be a natural evolution of wireless communications.
Hoping this blog has enough basic idea about the new technology named Li-Fi internet. To know more about Li- Fi internet visit us at www.redfoxwebtech.com or call us at 646 755 9669.