Optical Fiber

Optical fiber, also called fiber optic, has the ability to carry much more information than traditional copper wires, performing data transmission at the speed of light pulses. It is typically not subject to electromagnetic interference or required to retransmit signals. Total internal reflection is the process that keeps light in the core of an optical fiber. This enables it to act as a waveguide. Fibers that are able to support transverse modes are known as MMFs (Multimode fibers). MMFs typically have an enormous diameter-core and are commonly used for communication links over a short distance. Data transmission on an optical fiber wire calls for the presence of repeaters at the distance intervals. Glass fiber requires more security than copper within an outer cable. Because of this and the fact that the installation of additional wiring is so labor intensive, optical fiber wires are rarely used for personal use. The type of fiber used for longer distances is known as single mode fiber. Optical fiber is currently used by most telephone companies to support long-distance service.