This post introduces to a new
technology which can be used to transfer data by using light, Google Already
ahead in this type of connection in USA which usually gives 1 Gbps speed.
Till now LED’s were considered just as an
illuminating device but this July HERALD HAAS, a professor of engineering at
Edinburgh university discovered how led’ s can serve wireless transmitting data
access point. From any led source available like led bulbs, street lamps or any
lightning object can be used for communication.
Just think the
speed of light = 299 792 458 m / s
What
if the rate of data communication has the same value i.e. transmit data at the
speed of the light? Well what i think that it will be simply described in one
word that is “amazing”. Haas has done it. According to him communication is
possible using the principle of orthogonal frequency-division multiplexing which
is used in 4G also. In this the digital data is encoded on multiple carrier
signals.
Various intensities of light transfer different signals. It is just like
working on Morse code using a torch or a light source (here the light source is
led). Led’s are used to
transmit data in a rapid stream of binary code which are invisible to the naked
eye, can then be detected by a light-sensitive receiver.
Although our very own Wi-Fi transmits data through radio waves
which work on small fraction of electromagnetic spectrum. The bandwidth is low
and we all have faced this problem. In college hostels, coffee shops the
limited bandwidth spoils our entire mood’ when the number of people transmitting
data increases and our speed starts decreasing. Similarly 3G, where the system
is getting increasingly congested thereby turning from a high speed transmitting
data scheme to a silkworm speed accessing method.
With this technology accessing or transmitting
data in aircrafts, where radio waves could be a bit dangerous this technology
will come into aid, it is of great use in underwater oil rigs where
communication through radio waves is not possible. The interference level of
this technology is low. It can lead up to speeds as high as 100 MB per second.
Although this technology sounds like a replacement to
Wi-Fi but this high speed data transferring technology also has some
limitations that is the inability of light to pass through obstacles. It cannot
pass through walls and can be blocked. If the light signal is blocked, we can seamlessly switch back over
to radio waves (Wi-Fi).
Now
when we have to transmit data we got both light and radio waves to use
accordingly as per the environment around us. The conclusion is that there is
no dead end when it comes to technology, science always shows the path.
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