Have you gotten frustrated at the slow internet speeds when you’re using wireless internet (wi-Fi) in a coffee shop, stealing it from next door, or competing for bandwidth at a conference? Now Li-Fi, a super-fast alternative to Wi-Fi, will be a great solutiuon to your problems. It has been proven capable of sending data at up to 1GBps in real-world tests and enables a high-definition film to be downloaded in seconds. Today’s article provides a brief introduction to Li-Fi. Let’s enjoy this new technology. Li-Fi stands for Light-Fidelity. This technology is very new and was proposed by the German physicist Harald Haas in 2011. It is a bidirectional, high speed and fully networked wireless communication technology similar to Wi-Fi. Li-Fi transmits data through illumination using an LED light bulb, which can be the technology for the future where data for laptops, smart phones, and tablets will be transmitted through the light in a room. With Li-Fi enabled LED light bulbs, a controller is used to transmit encoded data into those LEDs. An optical sensor is used to receive the data, which is then decoded. This is conceptually similar to Morse code —but at rates of many millions of times a second, which is imperceivable to the human eye. The receiver has optics, and is fast enough to ‘see’ the light dimming and brightening, smart enough to decode the Li-Fi data, and then deliver it to the attached device such as a laptop. Devices can include both a transmitter and receiver to enjoy two-way communications. All one has to do is to vary the rate at which the LED’s flicker depending upon the data we want to encode.
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AuthorI am an optical engineer and blogger at www.fiber-optic-transceiver-module.com. Recently I am in charge of developing optical transceivers modules such as SFP, SFP+, QSFP, and CFP, etc. I want to share some experience here. Archives
April 2017
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