1. The Future Technology In Wireless Communications – VLC
Effat University Collaboration with KAUST Photonics Lab
Raghad Alsulami
Bashair Alsulami
Advisor: Mr. Hassan M. Oubei &
Dr. Mohammed A. Majid
Prof. Boon S. Ooi
column
pore domains 1 μm
primary pore
pore
domain
200 nm
etched column 1 μm
1 μm
GaN
nanomembrane
]
Light sources:
• The light
sources may
be LEDs or
laser diodes
(LD).
Visible light communication
VLC is exactly what it sounds like -- using light as
a method of delivering communication. Traditional
internet uses radio frequencies to transmit
information. VLC uses light. . In the last few years,
visible light communication (VLC) based on light-
emitting devices (LEDs) and laser diodes (LD) has
gained popularity and is poised to become a
promising candidate for the next generation
broadband wireless access to resolve the severe
congestion of the RF spectrum and wireless traffic
bottleneck. VLC is expected to complement the
existing wireless RF solutions thanks to its high
data capacity, low power consumption, high degree
of security against eavesdropping and immunity to
EMI.
Li-Fi stand for
Light Fidelity
Like Wi-Fi,it’s a method of
transmitting data from one point to
another wirelessly.
Whereas Wi-Fi uses RADIO WAVES,
Li-Fi uses LIGHT to transmit data.
Visible light communications properties
• Secure
• Line of sight
• High density
• Free, unlicensed spectrum
• Not affected by RF-noise
• Mitigates RF health concerns
RF NOT FEASIBLE
in
Underwater Communications
System Overview
The system uses the LD as a light source to send the audio signals over 1 m
distance. The system consists of two parts: a laser transmitter and an optical
receiver. The laser transmitter takes the audio signal out of a phone, and
produces matching optical pulses. We have used a photodetector to receive the
signal at the receiver. At the receiver the photo detector detects the signal and
then fed this signal to a loudspeaker where the input audio signal could be
heard.
Wireless Communication Demand
Wireless communication is necessary to accommodate
the exponentially increasing wireless traffic demand.
The time has come to seriously consider the upper parts
of the electromagnetic spectrum for wireless
Communications .
Acknowledgement
Prof. Boon S. Ooi, Photonics Lab KAUST