Let's first have some word-study.Hehe. Fiber optics (optical fibers) are long, thin strands of very pure glass about the diameter of a human hair. They are arranged in bundles called optical cables and used to transmit light signals over long distances. Some can be made from plastic. Core is a thin glass center of the fiber where the light travels Cladding is an outer optical material surrounding the core that reflects the light back into the core Buffer coating is a plastic coating that protects the fiber from damage and moisture Jacket is an outer covering of the cables composed of hundreds or thousands of optical fibers arranged in bundles in optical cable.
Optical Fibers has two types: Single-mode fibers have small cores (about 3.5 x 10-4 inches or 9 microns in diameter) and transmit infrared laser light (wavelength = 1,300 to 1,550 nanometers). Multi-mode fibers have larger cores (about 2.5 x 10-3 inches or 62.5 microns in diameter) and transmit infrared light (wavelength = 850 to 1,300 nm) from light-emitting diodes (LEDs).
