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Important aspects of designing a fiber optic cable

 


One of the most important aspects of designing a fiber optic cable is calculating the additional length of the fiber, which is the commonly used name for fiber spacing in terms of the length of cable it can absorb. Up to a certain limit, elongation that can occur during the installation phase. This parameter is especially important because overhead cables are permanently tensioned. This is achieved during the tube extrusion and wiring stages by combining and controlling many variables such as extrusion line speed, temperature profile, tube winding voltage, wiring stage, etc.


Managed Fiber services


Preventing water from entering the fiber optic cable and controlling propagation is very important for outdoor cables. This is because prolonged exposure to water can have a detrimental effect on the transmission properties of optical fibers. Until recently, the cable was secured with gelatin that fills the gaps in the optical core. In recent years, the pressure to reduce installation costs has eliminated the gelatin around the tube, avoiding a pre-melt cleaning. Therefore, conventional gelatin has been gradually replaced by dry materials in the form of strands and hydro-expanded tapes that expand when exposed to moisture and block the passage of water within the cable.


In certain applications where cables may be in permanent contact with water, the transverse stiffness provided by a polyethylene sheath is reinforced with polymer coated aluminum tape, applied along the length of the sheath in an extrusion operation, and welded with heat.


Cabelte offers a wide range of fiber optic cables for indoor and outdoor installations, which can be pulled or blown to suit existing installation processes.


Adopting the latest technology, the cable can be constructed from a large number of fibers with optimized diameter and weight and easy handling.


The gradual use of dielectric cables without incorporating metallic elements has led to the application of materials with excellent properties from the mechanical point of view. It is mainly used for ADSS type self-supporting overhead cables and fiberglass rods, as in the case of aramid, which can build high tensile strength and low weight cables, mainly used as a tensile strength element in the center of the cable, but in pipe. wiring and reinforcement "Also used as support for protection against buckling." However, for certain applications, metallic mechanical protection devices are also used. The steel tape is prominent, applied lengthwise and wavy so as not to affect the flexibility of the cable too much.


Product range


The scope provided by Cabelte is as follows:


-Installation via direct buried installation cable and conduit

-Cable for aerial installation

-OPGW cable protector cable for high voltage overhead lines with built-in optical fiber.


Regarding specific protection, the following stand out:


-Cable with ballistic protection

-Non-metallic protection cable against rodents

-Cable with improved fire behavior


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