Since optical fibers are customarily manufactured from glass which is electrically non-conductive, it is possible to route optical fibers alongside high-voltage power lines, and also connecting together devices at vastly different electrical potentials from each other, with. Since optical fibers are customarily manufactured from glass which is electrically non-conductive, it is possible to route optical fibers alongside high-voltage power lines, and also connecting together devices at vastly different electrical potentials from each other, with. An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers are widely used in fiber-optic communication, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than. Fiber-optic communication is a method of transmitting data from one point to another by sending infrared light pulses through an optical fibre. Light acts as a carrier wave and can be modulated to carry information. Optical fibre is preferred over electrical cabling for long-distance transmission. Cables made of optical fibres first came into operation in the mid-1970s. Simply put, an optical fiber is a “pipe” through which light flows.