Li-Fi, The Wi-Fi From the LED : Blazingnly Fast Data Transmission Via Light

A team of scientists from china have triumphantly worked out and developed a new economical low-cost way of getting connected to internet by using signals sent through LED light bulbs instead of radio frequencies as in the case of ‘Wi-Fi’, a step expected to revolutionary change the process of online connectivity. It is called Li-Fi (Wi-Fi from the bulbs or from LEDs). The light bulb with embedded microchip emits a corresponding signal and produces data rates as fast as 150 Mb/s, which is speedier than the average broadband connection in China. Instead of using radio waves, the data transfer works via light waves (over the visual spectrum) with a significantly higher frequency. Light on and light off functions as digital 1 and digital 0 sending binary information to a recipient. This exchange is able to transmit data packets but goes so fast that the human eye perceives a constant light. Mr. Chi Nan, an IT professor at Shanghai’s Fudan University said, “Four computers can be connected to internet through one- watt LED bulb using light as a carrier instead of traditional radio frequencies, as in Wi-Fi”.

Li-Fi is cost-effective, efficient, have no capacity problems and it is very fast. According to Chi, Wherever there is an LED light bulb, there is an Internet signal. Turn off the light and there is no signal, If the light is blocked, then the signal will be cut off. A team of British researchers have already set a new speed record of 10 Gbit/s on Li-Fi technology. To achieve this, the scientists used three micro- LEDs that transmit 3.5 Gbit/s each. These advancements suggest a more practical implementation of Li-Fi in office space to replace the wireless terminals. This technology is certainly going to revolutionize every thing built around radio frequencies. We will have to wait a bit for Li-Fi, the Wi-Fi from the LED coz there is still a long way to go to make Li-Fi a big commercial success.

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