Tired of Spotty Wi-Fi? Try the New Laser Li-Fi
We all know how annoying spotty Wi-Fi can be? We all need a reliable connection with fast data rates without interruption. So if Wi-Fi isn’t working for us, what alternatives do we have? Here’s one, it’s called Li-Fi.
Li-Fi uses LED-based room lighting to transmit data rather than conventional radio waves method. However, there is a Li-Fi proponent that is beyond LEDs and using laser-based lighting. Which seems to be more efficient.
According to Harald Haas, chair of mobile communications at the University of Edinburgh:
The problem is that LEDs, although they are more energy efficient than incandescent light, they still can be improved in terms of their light output. We strongly believe the next wave of energy efficient lighting will be based on laser diodes.
By modeling the output coming out of LED lights, Li-Fi encodes data. The rapid flicker can’t be noticed by a human eye but is readable by a desktop or mobile device.
The signals can be read and sent back to the transceiver on the ceiling of your room. This provides a way for these devices to communicate with each other. But the technology still has to overcome some hurdles though.
For example, several LED lights convert blue light to white using phosphor coating. This limit the speed of modulation and as a result, data rates slow down.
Where there is a problem, there is always a solution. Replacing LEDs with off-the-shelf laser diodes seem to help the matter a lot, according to a published research.
Li-Fi, using LEDs, can go up to 10Gb/s, but using laser boosts that data rate to 100Gb/s. For now, this type to set-up is a bit expensive for an average user, but we can expect costs to come-down in the future.