Fi Technology Progressing?



Introducing Li-Fi technology, where people can seamlessly access internet in their smart devices using light to transmit data. The vision is that Li-Fi will become a global phenomenon providing communications capability in a great diversity of commercial applications. Experiments like these are promising to turn the vast lighting infrastructure across the globe into an alternate Internet network.

Using light to transmit data allows Li-Fi to offer several advantages like working across higher bandwidth , working in areas susceptible to electromagnetic interference (e.g. aircraft cabins , hospitals) and offering higher transmission speeds. PureLiFi has partnered with LED light maker Lucibel to develop the technology.

According to Science Alert , Li-Fi works a bit like Morse code but on a visual spectrum, using flickering lights to transmit data. This means that Li-Fi is completely wireless, much like existing Wi-Fi. If their wires were cut and replaced with light - say from submerged, high-powered lamp - then they would be much freer to explore just like using LiFi technology over here.

This new development results from the introduction of the first LED ‘light bar' fixtures equipped with the required transmission technology and designed to replace the most ubiquitous form of lighting in commercial and industrial facilities: fluorescent tubes.

They are slow as the increased number of users and larger volumes of data to be transferred decelerate both the data rate as well as communication cycle times. Fundamentally, LiFi can be used anywhere where there is an existing lighting infrastructure. "I can see it being used in streetlights as access points for smart city applications," he says.

The high speed light pulses are invisible to the naked eye, yet can be used to transmit data at extremely high speeds to a receiving device located in a laptop, computer tower, cell phone or other smart device. Light-Fidelity (LiFi) takes visible light communication (VLC) further by using light emitting diodes (LEDs) to realise fully networked wireless systems.

G. OWC includes infra-red and ultra-violet communications as well as visible light. When a constant current is applied to an LED light bulb a constant stream of photons are emitted from the bulb which is observed as visible light. Rather than using radio frequencies as WiFi does, LiFi uses a light source, a LiFi-enabled bulb with a special chip in it and a photo detector to create an Internet connection.

IFi or Light Fidelity is a high speed, bidirectional and fully networked subsets of visual light communications VLC (VLC). Coined by German professor Harald Haas, the term LiFi refers to a process of optical data transmission over short distances. We just need an Encoder and Decoder part to transmit and receive signal through light.

Transmitting information with light is as old as the signal fire, but transmitting high-speed data via the lights above our heads has only been possible for about five years. It's created a product named MyLiFi that lets you get internet wirelessly using a lamp and a dongle that plugs into your computer's USB port.

Li-Fi uses a photo-detector to receive light signals and a signal processing element to convert the data into 'streaming binary digital' content. Backup generators always focus on light first, so Li-Fi technology is a good fit, allowing people to communicate and locate each other in difficult circumstances.

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