Overview

Li-Fi is a communication technology that uses visible light to transmit data. Instead of the radio frequency spectrum that is used by Wi-Fi, Li-Fi uses the visible light spectrum. Typical FSO and Li-Fi are similar in that they both use light, require line of sight and can provide high data speeds, but differ in that Li-Fi tends to use visible light frequencies and LEDs versus FSO’s use of Lasers, Li-Fi is typically used indoors over shorter distances. Li-Fi can also refer to systems that blend elements of FSO and Li-Fi together, such as using lasers in the visible spectrum. [1]

References

Li-Fi technology-based long-range FSO data transmit system evaluation | Sustainable Engineering and Innovation (ardascience.com)

[1]Design-an-Outdoor-Light-Fidelity-Li-Fi-System-Based-on-All-Optical-OFDM-Architecture.pdf (researchgate.net)

[2]Haas H, Elmirghani J, White I. 2020 Optical wireless communication.Phil. Trans. R. Soc. A 378: 20200051. http://dx.doi.org/10.1098/rsta.2020.0051