Data Transfer Using Li-fi

Abstract

Light-based wireless communication, abbreviated as Li-Fi or Li-Fi, uses light rather than radio waves to send data from one device to another. This technology relies on visible light communication (VLC) to transmit information through light-emitting diodes (LEDs). By modulating the intensity of the light, Li-Fi enables high-speed data transfer and can be used in various applications such as indoor positioning systems and internet connectivity in areas with high radio frequency interference. This concept was first presented by Harald Haas at a TED Global event in Edinburgh in 2011. Li-Fi, short for light-fidelity, is a light communication system that can send and receive data rapidly across the visible, ultraviolet, and infrared light spectrums. Only light-emitting diode (LED) bulbs are currently capable of transmitting data in the visible spectrum. Similar to Wi-Fi from the perspective of the end user, the technology differs primarily in that Wi-Fi transmits data by inducing a voltage in an antenna through radio waves, whereas Li-Fi does so through the modulation of light intensity. Li-Fi can operate in environments where other wireless technologies would be disrupted by electromagnetic noise (e.g.aircraft cabins, hospitals, or the military).