Tightly packaged fiber, and dual-core indoor cable and processing method thereof

Abstract

The invention relates to a tightly packaged fiber, and a dual-core cable using the tightly packaged fiber and a processing method thereof. The tightly packaged fiber consists of a single-mode or multi-mode fiber core, a cladding layer clad on the circumference of the fiber core, a primary coating layer coated on the circumference of the cladding layer and a secondary coated layer tightly sleeved on the circumference of the primary coating layer, wherein the secondary coated layer is a polyvinyl fluoride protection layer. By taking polyvinyl fluoride which has relatively high chemical corrosion resistance, creep resistance and compressive strength and relatively wide bearable temperature range as the secondary coated layer of the tightly packaged fiber, the tightly packaged fiber can have enough mechanical and environmental protection capability and can be independently used. The dual-core cable using the tightly packaged fiber, which is processed by the method has the advantages of small volume, light weight, stable performance and low cost, is suitable for indoor comprehensive wiring and can be used as internal connection wires of various optical devices, optical modules and optical distribution frames.

Description

technical field [0001] The invention relates to a communication optical cable, in particular to an indoor optical cable and a manufacturing method thereof. Background technique [0002] Traditional twin-core optical cables are mainly used for indoor integrated wiring and communication equipment interconnection lines. In recent years, in FTTH projects, the user's indoor wiring is the most complicated link, and there are many factors to consider, not only to ensure the safety of the line, but also to take into account the indoor appearance, and at the same time to facilitate the construction. Most of the existing twin-core optical cables are leather optical cables, whose cross-section is 8-shaped, and the strengthening member is made of FRP, which is located at the center of the two circles, and the optical fiber is located at the geometric center of the 8-shaped. The standard drop cable size is 2.0mm×3.1mm. [0003] With the continuous development of access network and FTTH...

AI Technical Summary

Problems solved by technology

[0006] Since the outermost layer of the tight-packed optical fiber is soft polyvinyl chloride or polyester plastic, the protective layer composed of it cannot fundamentally protect the optical fiber in terms of mechanical properties, that is, it cannot be used alone, and an additional tensile material ( Materials such as aramid fiber) and outer sheath for mechanical and environmental protection can be used, which limits the application of tight-packed optical fibers to certain extent

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