Optical fiber band and optical cable using the optical fiber band

Abstract

The invention relates to a fiber ribbon used for communications, which is mainly composed of a plurality of optical fibers and bonding material; the optical fibers are positioned in the bonding material; the entire bonding material coats the optical fibers; the adjacent optical fibers are separated by the bonding material; and the bonding material is an overall structure. The fiber ribbon used for communications is characterized in that the cross-section of the fiber ribbon is fan-shaped or is shaped as a sector lack of the vertex angle; and the optical fibers are vertically extended along the two sides which form the vertex angle of the sector in a mutually parallel way. The invention also relates to layer-stranded type, frame-style or central tube type optical cables using the fiber ribbon. The invention adopts colored bonding material to solve the defects that the small-core number fiber ribbon has ambiguous printing which is difficult to identify; at the same time, the fan-shaped optical fiber ribbon is adopted to reduce the diameter of the optical cable, decrease the cost of the optical cable, and increase the convenience to the inspection, construction, and maintenance staff to identify the optical fiber ribbons.

Description

technical field [0001] The invention relates to an optical fiber ribbon for communication and an optical cable using the optical fiber ribbon, in particular to a fan-shaped optical fiber ribbon in cross section. Background technique [0002] In the communication industry standard of the People's Republic of China YD / T 979-1998 "Technical Requirements and Inspection Methods for Optical Fiber Ribbons", two structures of optical fiber ribbons are recommended: edge bonding type and overall coating type. The structure of the overall coated optical fiber ribbon is as follows: figure 1 As shown, it is composed of several optical fibers 2 and bonding material 1, the optical fibers 2 are located in the bonding material 1, the bonding material 1 covers the optical fibers 2 as a whole, and the adjacent optical fibers 2 Separated by bonding material 1, the bonding material is an integral structure, the cross section of this kind of optical fiber ribbon is approximately rectangular stru...

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Problems solved by technology

[0008] However, since the currently used integrally coated optical fiber ribbons use natural cured resin, for the above three types of optical cables that require laminated optical fiber ribbons, the optical fiber ribbons must first be marked before using the optical fiber ribbons. The method is to print the words or symbols that can be distinguished from each other on the surface of the optical fiber ribbon. This method increases the cost of optical fiber ribbon production and lengthens the delivery cycle of the optical fiber ribbon; , due to its narrow width, it is currently not possible to overcome the purpose of clear marking

[0009] In addition, since the cross-section of the current overall cladding optical fiber ribbon is approximately rectangular, and the ratio of the length to width of the rectangle increases with the increase in the number of cores in the optical fiber ribbon, the ratio of the 2-core optical fiber ribbon is 1.75, and the ratio of the 24-core optical fiber ribbon The ratio is 17; therefore, when the optical fiber ribbon is placed in the protective tube or skeleton groove of the above-mentioned three kinds of optical cables, a protective tube with a relatively large outer diameter or a relatively wide skeleton groove is required, which greatly increases the cost of the optical cable and affects the optical fiber. The market competitiveness of optical fiber cables is not conducive to the large-scale promotion and application of optical fiber ribbons

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