As radio frequencies continue to become more congested, a group of emerging light-based communications technologies such as free space optics (FSO) and Li-Fi represent other ways service providers can communicate without wires. Supporters of visible light communications (VLC) contend that using the vast amounts of readily available free and unlicensed visible light as well as infrared spectrum could not only solve issues of limited and congested RF spectrum but also deliver much faster wireless. Read more
