Li-Fi Technology.
T.Ganesh
ECE- A tganesh.gopi140@gmail.com Abstract

Li-Fi (Light Fidelity) is a bidirectional, high speed and fully networked and a subset of optical wireless communications (OWC) and could be a complement to RF communication (Wi-Fi or Cellular network), or even a replacement in contexts of data broadwireless communication technology similar to Wi-Fi. The term was coined by Harald Haas and is a form of visible light communicationasting. It is so far measured to be about 100 times faster than some Wi-Fi implementations, reaching speeds of 224 gigabits per second. It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves) spectrum, part of optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations. This OWC technology uses light from light-emitting diodes (LEDs) as a medium to deliver networked, mobile, high-speed communication in a similar manner to Wi-Fi. The Li-Fi market is projected to have a compound annual growth rate of 82% from 2013 to 2018 and to be worth over $6 billion per year by 2018.

Whether you‘re using wireless internet in a coffee shop, stealing it from the guy next door, or competing for bandwidth at a conference, you‘ve probably gotten frustrated at the slow speeds you face when more than one device is tapped into the network. As more and more people and their many devices access wireless internet, clogged airwaves are going to make it increasingly difficult to latch onto a reliable signal. But radio waves are just one part of the spectrum that can carry our data. What if we could use other waves to surf the internet? One German physicist, DR. Harald Haas, has come up with a solution he calls ―Data Through Illumination‖—taking the fiber out of fiber optics by sending