The center of the optical fiber is usually a core made of glass, and the core is surrounded by a glass envelope with a lower refractive index than the core, so that the optical signal entering the core is reflected by the cladding interface, so that the optical signal propagates in the core. go ahead. Since the optical fiber itself is very fragile and cannot be directly applied to the wiring system, it is usually bundled into a bundle, with a protective casing on the outside and a tensile wire in the middle. This is the so-called optical cable, which usually contains one or more optical fibers.

Indoor optical cable

According to different use environments, optical cables can be divided into indoor optical cables and outdoor optical cables.

Indoor optical cables are classified according to the use environment of optical cables, as opposed to outdoor optical cables.

Indoor optical cable is a cable formed by optical fiber (optical transmission carrier) through a certain process. It is mainly composed of optical fiber (glass filament as thin as hair), plastic protective sleeve and plastic outer skin. There is no metal such as gold, silver, copper and aluminum in the optical cable, and generally has no recycling value.

Indoor optical cable is a kind of communication line in which a certain number of optical fibers form a cable core according to a certain method, which is covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission.

The tensile strength of the indoor optical cable is small and the protective layer is poor, but it is also lighter and more economical. Indoor optical cables are mainly used for wiring in buildings and connections between network devices.