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Tham khảo tài liệu 'datasheet - fo - cable - patch cord & pigtails - all', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PATCHCORDS AND PIGTAILS FIBER OPTIC SOLUTION S Optical fibers with connectors Optical fiber cables with connectors KRONE makes to order cable connections for single mode (SM) and multimode applications (MM) with optical connectors from our production and from other internationally leading manufacturers. Our range consists of a great variety of cable versions and lengths and connector types. All cables are halogen free and according to IEC 332-3C and IEC 332-1. SM connections The SM connector ferrules are offered with different types of polishing. Losses and reflections which can occur in the connection depend to a large degree on the form and the surface quality of the ferrule face. This in turn has a decisive influence on the signal transmission quality, especially in the case of high-rate digital as well as analogue transmission. The following ferrule polishing types are characterised: ■ PC polishing (Physical Contact) : The convex form of the end surfaces ensures that there is no gap between the fiber ends and thus hardly any reflection. The ferrule end surfaces are pressed against each other, when connected inside the adapter, so that the opposing fibers come into direct physical contact. Minimum return loss is 40 dB (SM fibers). ■ UPC polishing (Ultra Physical Contact) : In the case of UPC polishing, further polishing on the end surface achieves a minimum return loss of 50 dB (SM fibers). Just available for SC and FC. ■ APC polishing (Angled Physical Contact) : Further improvement of the return loss can be achieved by angled polishing technology. The convex end surfaces of the plug pins are polished at an angle of 8°or 9° to the fiber axis. The resulting reflections are therefore led out of the fiber core, independent of whether the connection has been established (fiber-fiber transmission ) . Minimum return loss is 60 dB (SM cables). Direction of propagation ferrule front face Optical MM connections fiber On MM connectors which are used almost exclusively in
