Optical fiber is a light conduction tool that uses the principle of total reflection of light in a fiber made of glass or plastic.
Optical fiber bare fiber is generally divided into three layers: core, cladding and coating.
The optical fiber core and cladding are composed of glass of different refractive indices, with a high refractive index glass core (germanium-doped silicon dioxide) in the center and a low refractive index silicon glass cladding (pure silicon dioxide) in the middle. Light is shot into the fiber at a specific incidence Angle, and full emission occurs between the fiber and the cladding (because the refractive index of the cladding is slightly lower than the core), so that it can propagate through the fiber. The main function of the coating layer is to protect the fiber from external damage, and at the same time increase the flexibility of the fiber. As mentioned earlier, the core and cladding are made of glass, which cannot be bent and fragile, and the use of the coating layer protects and extends the life of the fiber.
The above is the "fiber structure" brought by HDV Phoelectron Technology LTD. Our company is a specialized optical network equipment as the main production manufacturers, the related network equipment covers OLT series, ONU series, switch series, optical module series and so on, welcome to come to understand.