li-fi

The future Speed Li-Fi Technology Explained

Li-Fi(Light Fidelity) 

Can you imagine data transferring at a rate of 100 GB/s!! Yes, that’s possible. With the new tech called Li-Fi, we can get a ridiculous speed of 100 GB/s  that can scale up to TB/s with the perfect combination of Photonics and electronics. This idea was developed by Harald Hass in 2011 who is a professor at the University of Edinburgh, Scotland.

THE CONCEPT

The basic concept behind this tech is VLC (Visible Light communication) that uses the visible light portion of the electromagnetic spectrum to transmit information. From here things start getting interesting.

lifi

Like Wi-Fi, Li-Fi is wireless and uses similar 802.11 protocols, but it uses a visible light communication (instead of radio frequency waves), which has much wider bandwidth. It is designed to use LED’s similar to those used in our homes.

 

WORKING

Its working is quite simple. An LED with signal processing technology streams data to the photodetector at ultra high speed, which at last is received by the user. And top of it, there in no loss of data.how-li-fi-works

An LED light bulb is a semiconductor light source meaning that the constant current of electricity supplied to an LED light bulb can be dipped and dimmed, up and down at extremely high speeds, without being visible to the human eye.

For example, data is fed into an LED light bulb (with signal processing technology), it then sends data (embedded in its beam) at rapid speeds to the photodetector (photodiode).

The tiny changes in the rapid dimming of LED bulbs are then converted by the ‘receiver’ into an electrical signal.

The signal is then converted back into a binary data stream that we would recognize as the web, video and audio applications that run on the internet enables devices.

 

Li-Fi vs Wi-Fi

Guys just have a look on the table below.

lif vs wifi

As we can see that Li-Fi is a mile ahead as compared to Wi-Fi. It only lags behind in market maturity and range. Guys the development of this tech has just started and its going to hit the market or I say to the common people soon.

On the other hand, the range is also not a big deal, its a plus point as it adds to its security level and data density that increases transfer rate to a large extent. Being transmitted in the form of light it reflects from walls and other things, increasing density and not this only but it can be used under water where wi-fi is of no use. Similarly, mines, where there are restrictions on certain frequencies, on street lights where it can be used as a cost-effective way to share data, in each and every vehicle so that they can communicate and in future some smart cars, will be able to avoid accidents etc. Li-Fi has lots of uses and its health conscious tech too!

 

Well Li-Fi is not going to reach common people in the next ten to fifteen years and wi-fi is dominating the market for now but the future of transmission is clearly Li-Fi as it’s clear winner against wi-fi.

Thanks for your time.

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