What is Optical fiber
Feb 23, 2023| What is Optical fiber?
Optical fiber is a kind of fiber composed of two layers of transparent media in concentric circles. The most widely used dielectric material is quartz glass (SiO2). The inner medium, called the core, has a higher refractive index than the outer medium (called the cladding). The refractive index of the core or cladding is adjusted by doping germanium, phosphorus, fluorine, boron, and other impurities in the quartz glass.
The transmission wavelength of optical fiber for communication is mainly near-infrared light of 0.8-1.7 microns. The core diameter of the optical fiber varies from type to type, usually a few microns to 100 microns, and the outer diameter is mostly about 125 microns. It has a plastic covering on the outside. Optical cables are made by combining single or multiple optical fibers and strengthening and protecting them. Fiber optic cables can be used in a variety of environments. Optical cables are manufactured in a similar way to electrical cables.