Basic concepts and definitions
The most responsible operation in the process of construction of fiber-optic, predetermining the quality and range is the installation of optical fibers. Such a combination of fibers and installation cables are produced in the manufacturing process as well as during the construction and operation of cable lines.
Installation is divided into permanent (fiber welding) and temporary (plug connectors). Fiber optic connectors typically are valves designed for adjusting and fixing the fibers to be connected, as well as mechanical protection for the splice.
The main requirements for connectors are:
small transient loss;
resistance to external mechanical and climatic influences;
In addition to the detachable connectors are required constancy of parameters during re-docking.
Insertion loss connection of optical fibers in a cable transmission path, are divided into external and internal.
referred to the losses associated with the features of the connection method, including the preparation of the ends of optical fibers, and comprising lateral displacement of the core, diversity ends, the slope of the axes, the angle of the fiber end face, the Fresnel reflection.
are associated with the properties of the resulting optical fiber and, for example, variations in core diameter, numerical aperture, the refractive index profile, netsirkulyarnostyu core Concentricity core and cladding.