Optical fiber

An optical fiber or optical fibre is a thin, flexible, transparent fiber that acts as a waveguide, or "light pipe", to transmit light between the two ends of the fiber. Fibers are used instead of metal wires because signals travel along them with less loss and are also immune to electromagnetic interference. Furthermore, because optical fibers transmit only the light, while this is produced by an external generator, they can directly pass through hostile environments for electrical cables, such as water.

optical fiber pool lighting

@ Watch how optical fiber work

PATENT: Method of producing optical waveguide fibers, Keck et al. 1970