As is known to all, the quality of the transmission medium in the integrated wiring is very important for the whole project, not only the service life of the integrated wiring project of this problem, more important is the guarantee of the quality performance. People are often keen to use fiber as fiber optic cable transmission medium, because of the fiber optical fiber has: strong resistance to electromagnetic interference and signal loss, large capacity, light weight, small volume, long transmission distance, etc.
Although fiber optical fiber is widely used in long distance transmission in the integrated wiring, but there are not many people in the choose and buy is very understanding. Today, we are from the cable on the fiber structure, materials, technology, etc and we explain how to choose and buy high quality optical fiber products.
1> According to the material selection fiber optical fiber
Fiber optic cable used material and manufacturing process of fiber optic cable material selection is the key to the relationship to the service life of the cable. And manufacturing process is an important link in affect fiber quality, process stability, high quality products in the whole process of fiber optic cable production basically not additional loss in optical fiber, 0.01 dB/km or less is measured cable manufacturing technology level of the basic data. Cable of the main materials are: oil of fiber core, optical fiber, the sheath material, PBT (poly stupid 2 formic acid butyl glycol ester), they all have different quality requirements, fiber core requires the ability to have bigger power charger, higher signal-to-noise ratio, lower bit error rate, longer amplifier spacing, high information capacity; Oil of fiber refers to the oil in the optical fiber tube filling, its role is to prevent moisture in the air erosion optical fiber, the second is padding effect to the fiber, fiber buffer affected by vibration or shock.
2> According to some conclusions to choose fiber optical fiber
According to some conclusions to choose different types of fiber optic cable construction can be divided into the central tube type, gysts, skeleton and ribbon to wait for a few kinds, different USES and different structure, the user can according to the line situation put forward the corresponding requirements. Generally 12 core under the center tube type, simple process, lower cost center tube type, the overhead laying or good protect trunk pipeline network in competitive; Gysts cable by center placed stranded wire or single wire reinforced, adopting SZ synthetic cable, cable fiber number can reach 144 core. Its the biggest advantage is waterproof, prevent the strong pulling force, strong lateral pressure. Can be used in direct buried. At the same time easy to split, that is, part of fiber optic fiber optic cable, respectively, when using, do not have to keep the whole cable broken, only will be forked fiber breaking, for the data communication network. Add light node along the cable TV network is good; Ribbon cable thousands of cores, some conclusions can be done it will be 4 ~ 12 core optical fiber lines, constitute a ribbon fiber unit, then multiple arranged in cable strip unit in a certain way, our network level is generally selected cable layer tube type and renew type two kinds.
3> Choose according to use optical cable optical fiber technique
In accordance with the purpose to choose the corresponding cable according to different purposes, the cable can be divided into aerial optical cable, optical cable, submarine cable directly buried cable, pipeline and non metal cable and so on. Aerial cable require high strength, small temperature coefficient; Directly buried optical cable resistance, compressive strength, good moistureproof, prevent moisture characteristics, resistance to chemical attack; Pipe cable and submarine cable are good resistance to water pressure, tension and waterproof performance; No metal cable can be set up, together with high tension line insulation is better, although there is no iron body strengthening core, but also should have certain tensile ability. Cable when the choose and buy, therefore, the user to choose according to the purpose of the fiber optic cable, and puts forward requirements for manufacturers, ensure the stable and reliable cable to use.
To sum up, the choose and buy fiber optical fiber than coaxial cable is much more complex, and can’t simple with a few core price to compare, but should be selected according to the structure of optical fiber cable, raw materials, production technology and technical indicators to comprehensive consideration, we should not just choose too cheap price products. Because I have to consider many aspects, not just its service life, more to the whole project performance.