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Fiber optics are thin filaments of glass through which light beams are transmitted. Advantages of fiber include high information carrying capacity (bandwidth), very low error rates and insensitivity to electromagnetic interference. Then, the bare glass (125 mm) is cleaned and set in place under a special laser below a custom photo mask that is set 50 mm above the cable. Once the laser performs its cycle, the assembly is now customized. Abraham Van Heel covered a bare fiber or glass or plastic with a transparent cladding of lower refractive index. This protected the total reflection surface from contamination and greatly reduced cross talk between fibers.

Fiber-optic cable consists of glass fibers, allowing for significantly higher transfer speeds compared to copper. Data are transmitted in the form of light pulses injected by a laser or an LED. The cable uses glass fibers instead of copper wires to transmit conversation and data. AT&T's old cables generally are shark- free because they don't emit much magnetism. Glass cables need to be custom-cut so that they have a nice crisp edge that doesn't scatter the light, but their plastic cousins can be trimmed on the jobsite. Still, no ordinary wire cutter will do.

From a technical standpoint, fiber optic cable consists of a bundle of glass or plastic rods that can transmit data signals. Fiber optic cable can send and receive in both analog and digital formats, and can carry video, voice, and internet packets. Some new cable designers will actually provide built-in bend limits to protect the glass within.

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