The structure and transmission of 8-core outdoor optical cable. The 8-core outdoor optical cable is an outdoor communication cable with 8 built-in optical fibers (composed of silica and quartz glass).
It has a variety of structural models and two transmission modes. It uses a relatively wide range of communication optical cables and is mainly used in the transmission of long-distance communications and inter-office communications.
In terms of transmission, 8-core outdoor optical cables are mainly available in two specifications: single-mode and multi-mode.
Single mode (inner diameter is 9μm, outer diameter is 125μm) multimode (there are two types, inner diameter is 62.5μm, outer diameter is 125μm and inner diameter is 50μm, outer diameter is 125μm), single mode is one The long-distance transmission mode has two wavelengths: 1310 and 1550; multimode is a short-distance transmission mode (the transmission distance is limited to 2000 meters), and the wavelengths are 850 and 1300.
(Single-mode is now widely used, while multi-mode is gradually being phased out) Structurally, 8-core outdoor optical cables are mainly divided into two structural types: center bundle tube type and layer strand type.
The central beam tube type has the optical fiber located in the center of the optical cable. It adopts a structure without paste filling and double steel wire external reinforcement, which can accommodate 4-12 core optical fibers; the layer-stranded type uses optical fiber around the central reinforcement. A form of structure that can accommodate 4-144 core optical fibers.
