It has been called the next generation internet. Li-fi basically converts LED light bulbs to transmit data faster and cheaper than today’s Wi-Fi.
This new technology transmits data with the help of visible light spectrum. It has been dubbed a revolutionary new technology and UK scientists have even reported transmission speeds of up to 10Gbit/s, which is 250 times faster than our ‘speedy Gonzalez’ broadband connection. Earlier this year, the Fraunhofer Heinrich Hertz Institute in Germany had achieved speeds of up to 3Gbit/s while Chinese researchers claimed to have produced a 150Gbp/s connection while other laboratories around the world have claimed (without proof) to have achieved speeds of around 223 Gbps/s
In today’s world where nearly everything is based upon mobile gadgets, computers and the internet, this new technology comes at the perfect time.
The technology, also known as VLC or Visible Light Communications, is believed to be the future for mobile internet because of its relatively reduced costs and greater efficiency. Li-Fi is both cheaper and better when compared to our traditional WI-FI.
While both Wi-Fi and Li-Fi transmit data using the electromagnetic spectrum, Wi-Fi uses radio wives, where Li-Fi uses visible light. According to scientists, visible light (used by Li-Fi) is far more efficient than the radio spectrum, and can also achieve a much greater density which is why it is the future of wireless internet.
However, Li-Fi has its disadvantages too. While Wi-Fi is able to penetrate through walls, Li-Fi cannot since this technology is based on light. This disadvantage is considered by some as an advantage actually since because of this limit, it could prove to be potentially more secure when compared to Wi-Fi. Also, for Li-Fi to work, light bulbs would have to be kept on so they can transmit data, however, these could be dimmed to the point they are not visible to the human eye while remaining fully operational.
Li0-Fi could open up new possibilities for household devices. In the future, led lights could serve two main purposes- illuminate a room and create a home network so that smart gadgets could communicate with one another.
According to an article by the Ultra-parallel visible light communications (UP-VLC) project, by integrating CMOS electronics with GaN based micro-LEDs, researchers have developed CMOS-controlled color-tunable smart displays. The color-tunable LED pixels in these displays have a modulation bandwidth of 100 MHz, thus providing simultaneously a wavelength-agile source for high-speed visible light communications.