Optical wireless communications (OWC) is a form of in which unguided light is used "in the air" (or in ), without an., (IR), or (UV) light is used to carry a signal. It is generally used in short-range communication; extensions exist for and. OWC systems operating in the visible band (390–750 nm) are commonly referred to as.
In 1880, and his assistant created a very early precursor to fiber-optic communications, the, at Bell's newly established in. Bell considered it his most important invention. The device allowed for the of sound on a beam of light. On June 3, 1880, Bell conducted the world's first wireless transmission between two buildings, some 213 meters apart. Due to its use of an atmospher.
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