As is known to all, the quality of transmission medium is very important to the whole project in the integrated wiring, which is not only the service life of the integrated wiring project, but also the guarantee of its quality performance. People tend to use fiber optic cable as a long distance transmission medium, because the fiber optic cable has the advantages of strong electromagnetic interference resistance, signal attenuation, large capacity, light weight, small size, far distance transmission and so on.
Although the fiber optic cable is widely used in the integrated wiring for long-distance transmission, but not many people have a very deep understanding of its purchase. Today, we will choose from the fiber optic cable structure, materials, processes and other aspects of how to choose high quality fiber optic cable products.
First, select fiber optic cable according to the material
The material and production process of optical cable, fiber optic cable selection is the key to the service life of optical cable. The manufacturing process is an important factor that affects the quality of the cable, the whole process of product quality in the production process is stable, the cable is basically not included in the additional loss of fiber, more than 0.01dB / km is the basic data to measure the level of the manufacturing process of cable manufacturers. The main materials are: optical fiber, optical fiber, PBT ointment, sheathing materials (polyethylene terephthalate. Two), they have different quality requirements, the core requirements are large power capacity, high SNR, low bit error rate, long distance, high information amplifier carrying capacity; optical fibre ointment refers to ointment filling in fiber bundle tube, its function is to prevent the moisture in the air erosion fiber, two is the role of liner of fiber, fiber by vibration or impact buffer.
Technique two select fiber optic cable according to the number of cores
According to the number of cores, the structure of different types of optical cable can be divided into central beam tube type, layer stranding type, skeleton type and strip type, etc. the structure of the different uses is different, and the users can put forward corresponding requirements according to the line conditions. Generally use the central tube below 12 core, central tube has the advantages of simple process and low cost in overhead laying or have good protection of the pipeline branch line network competitive; cengjiaoshi fiber optic cable with steel wire or steel wire placed in the center to strengthen, with SZ continued to form a cable, fiber cable number is 144 core. Its biggest advantage is waterproof, anti strong pull, strong side pressure. It can be used for direct burial. At the same time, it is easy to branch, that is, when the fiber part of the optical cable needs to be used separately, the whole optical cable will not be broken, only the optical fiber that needs to be bifurcated can be broken, which is the data communication network. CATV network optical node along the addition is favorable; core number can do thousands of ribbon cable core, which is 4 ~ 12 core fiber alignment, a ribbon fiber unit, and a plurality of ribbon cable units are arranged in a certain way, we generally use network cable bundle and continuous layer two.
Technique three select fiber optic cable for use
According to the different uses, the optical cable can be divided into overhead optical cable, direct buried optical cable, pipeline optical cable, submarine fiber optic cable and metal free optical cable, etc.. Aerial cable with high strength, temperature coefficient; buried cable resistance, compressive strength, requirement of moisture-proof and anti humidity characteristics and good resistance to chemical corrosion; pipeline cable and submarine cable to water resistance, resistance to tension, waterproof properties is good; no metal cable and high voltage line with erection, the insulation, although there is no iron body to strengthen the core, but also have a certain tensile capacity. Therefore, in the purchase of fiber optic cable, the user should choose according to the use of fiber optic cable, and the manufacturers to request, to ensure the stable and reliable use of optical cable.
To sum up, choose the optical fiber than the coaxial cable is much more complicated, and not simply in a few core price to measure, but should according to the structure, the choice of optical cable technology and technical index of raw materials, production into account, we should not only choose the price is too cheap products. Because I have a lot to think about, not just the service life, but also the standard of the whole project performance.
