LiFi: The new Internet connection, safer networks and dizzying speeds.
LiFi is the latest commercial name of an optical communications technology that has been investigating for more than 100 years and consists of transmitting data at frequencies between 400 and 800 THz. It aims to be able to transmit information with conventional lighting elements such as light bulbs and LEDs at the same time as it illuminates, or not, a room, and adding only a few cheap and easy to manufacture elements to the current bulbs. It requires a modulator in the transmitting part that will turn off and on the light source very quickly imperceptibly for the users, thus creating the zeros and binaries, and a photodiode in the reception part, for example in the mobile, tablet or laptop Which picks up the changes of light and passes them back to the electric domain.
The first versions used fluorescent lamps that reached speeds of a few Kbps. Later LEDs were started, capable of being turned off and on faster, with more power, multiplying the final speeds. In 2011 Professor Harald Haas of the University of Edinburgh showed the first device he called LiFi transmitting at 10 Mbps. Later he began to speculate with speeds of up to 500 Mbps and later the Fraunhofer Institute of Berlin showed his advances indicating that they could reach 800 Mbps. Finally, the research continues with proposals that want to reach the 15 Gbps 1.88 GBps as they optimize the operation of both the sending and the receiving.
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