Structure of Stranded Optical Fiber Ribbon Cable

The structure design principle of manufacturing layer-stranded fiber optic ribbon cable, through the selection of fiber optic ribbon sleeves of different materials, the design and performance comparison of different sleeve sizes, and related tests, it is verified that the use of fiber optic ribbon sleeves of different materials , the performance change of fiber optic ribbon cable.

Stranded fiber optic ribbon cable

2. Theoretical analysis of the design of optical fiber ribbon cable sleeve

1. Dimensional design of optical fiber tape sleeve

Optical fiber ribbons can be divided into two structures, namely edge bonding type and integral cladding type. Compared with the edge bonding type, the overall cladding type structure has a correspondingly larger thickness and width of the optical fiber ribbon. Considering the actual production and use of fiber optic ribbon cables, in order to improve the lateral pressure resistance and torsion resistance of fiber optic ribbons, domestic fiber optic cable manufacturers currently choose to produce fiber optic ribbons with an overall cladding structure.

For the identification of optical fibers in optical fiber ribbons, it is generally recommended to select the full chromatographic method for identification, so as to facilitate the on-site management of engineering connection and future optical fiber distribution. Fiber ribbons can be superimposed to form a fiber ribbon matrix. A cross-sectional view of the matrix is ​​shown in Figure 1.

1.1 The inner diameter of the casing usually adopts the following approximate formula

The formula usually used for the inner diameter of the casing

The equivalent size of the optical fiber ribbon matrix is ​​shown in Figure 2, where the width and height of the optical fiber ribbon matrix determine the length of the diagonal of the matrix, and its length is the basis for our design of the sleeve size.

The formula for the inner diameter of the casing is as follows:

Formula for inner diameter of casing

The K value is related to the production process control. If the K value is considered large, the space for the optical fiber stack to move in the sleeve will be larger, and the quality of the fiber stack in the sleeve will be more guaranteed. If the diameter is too large, the cost of the optical cable will increase significantly.

The inner diameter of the sleeve determined by the above formula is designed based on a completely ideal rectangular optical fiber ribbon, but from the anatomical results of the actual optical fiber ribbon cable, the optical fiber ribbon is diamond-shaped in the sleeve, and there is a certain gap between the ribbons. . Therefore, the modified model of the optical fiber stack should be the stack during deformation.