How to look at the quality of fiber optic cable

Although fiber optic cable is widely used in long-distance transmission in integrated wiring, not many people have a deep understanding of its purchase. Today, we will explain how to purchase high-quality fiber optic cable products from the aspects of the structure, materials and processes of fiber optic cables.

Tip 1: Select fiber optic cable based on material

The materials used in the cable and the selection of the production process cable materials are the key to the service life of the cable. The manufacturing process is an important link affecting the quality of the optical cable. The products with stable process and high quality are basically not included in the whole process of optical cable production. ≤0.01dB/km is the basic data to measure the manufacturing level of optical cable manufacturers. . The main materials used in fiber optic cable are: core, fiber ointment, sheath material, PBT (polybutylene terephthalate), which have different quality requirements, and the core requires a large capacity to charge. Higher signal-to-noise ratio, lower bit error rate, longer amplifier spacing, higher information carrying capacity; fiber ointment refers to the grease filled in the bundle tube, the role of which is to prevent moisture in the air. Erosion of the fiber, the second is to cushion the fiber, the buffer fiber is affected by vibration or impact.

Tip 2, select the fiber optic cable according to the number of cores

According to the number of cores, the structure of different types of optical cables can be divided into central bundle tube type, layer stranding type, skeleton type and strip type, etc. The structure of different uses is different, and the user can make corresponding requirements according to the line condition. Generally, the center bundle tube type is adopted below 12 cores, and the center bundle tube type process is simple and low in cost, and is competitive in overhead line laying or branch line network with good pipeline protection; the layer stranded optical cable adopts center placed steel strand or single The wire is reinforced, and the SZ continuous synthetic cable is used, and the number of cables can be up to 144 cores. Its biggest advantage is waterproof, strong pull resistance, and strong side pressure. Can be used for direct burial. At the same time, it is easy to fork, that is, when the optical fiber of the optical cable needs to be separately used, it is not necessary to break the entire optical cable, and only the optical fiber to be bifurcated can be disconnected, which is for the data communication network. It is advantageous to add optical nodes along the cable television network; the number of cores of the ribbon cable can be thousands of cores, which are arranged in a row of 4 to 12 core fibers to form a ribbon fiber unit, and then the plurality of ribbon units are fixed. The way of arranging the cables is as follows. Our network-level optical cables are generally available in bundle tube type and layer-continuous type.

Tip 3, select fiber optic cable according to the purpose

According to the application, the corresponding optical cable can be divided into overhead optical cable, direct buried optical cable, pipeline optical cable, submarine optical cable and metal-free optical cable. The overhead cable requires high strength and small temperature difference coefficient; the direct buried cable requires anti-buried, anti-pressure, moisture-proof, anti-humidity characteristics and chemical resistance; the pipeline cable and the submarine cable must have good resistance to water pressure, tension and water resistance; The metal cable can be erected together with the high voltage wire. The insulation is better. Although there is no iron core, it must have a certain tensile strength. Therefore, when purchasing optical cables, users should choose according to the use of optical cables, and make requirements for manufacturers to ensure stable and reliable use of optical cables.

In summary, the purchase of fiber optic cable is much more complicated than coaxial cable, and can not be simply compared with the price of several cores, but should be based on the structural form of the cable, the selection of raw materials, production processes and technical indicators. Consider, we should not just choose products that are too cheap. Because I have a lot to consider, not only the service life, but also the standard of the entire engineering performance.