Posted by: crudbasher | October 29, 2013

Progress On Optical Wifi

If you want really fast wireless communications you kind of have to move to optical wavelengths. Radio waves like 3G and 4G can only transmit so much. Optical wavelengths can transmit magnitudes more information than radio. The downside is you need line of site to the reciever whereas radio can go through walls. The solution then is to have optical receivers everywhere. One approach is to use light bulbs as the receiver.


The researchers used a micro-LED light bulb to transmit 3.5Gbit/s via each of the three primary colours – red, green, blue – that make up white light.

This means over 10Gbit/s is possible.

Li-fi is an emerging technology that could see specialized LED lights bulbs providing low-cost wireless internet connectivity almost everywhere.

It’s an interesting technology. The other thing I understand about it is it doesn’t take a lot of power to use it. The only thing I don’t understand is where it goes when it gets to the light bulb. I mean, I suppose you have to have wired networking at that point right? Unless you can send networking signals through the powerlines.

I’m not sure if this technology will come to schools or not but it’s a nice innovation to feed our increasing data addiction.


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