How to choose fiber Fiber selection tips
Optical cable has become the main body of self-use network such as network data transmission, communication, cable broadcasting and TV. So, how do we choose fiber? The editor will share with you the fiber selection skills today.
Fiber Selection Tips
Choose fiber optic cables 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 type, layered type, skeleton type and ribbon type. .
Ordinary 12 cores or less adopt the central bundled tube type, the central bundled tube type process is easy and low cost, and it is competitive in the branch line network with overhead laying or good pipeline maintenance; the layered stranded optical cable adopts the centrally placed steel strand or single wire. The steel wire is reinforced, and the SZ continuous synthetic cable is used, and the number of fibers into the cable can reach 144 cores. Its biggest advantage is waterproof, strong pull resistance, strong side pressure.
Can be used for direct burial. At the same time, it is easy to bifurcate, that is, when part of the optical fiber of the optical cable needs to be used separately, it is not necessary to disconnect the entire optical fiber cable, but only the optical fiber to be bifurcated can be disconnected, which is related to the data communication network.
It is advantageous to add optical nodes along the cable TV network; the number of cores of the ribbon optical cable can reach thousands of cores. It is to arrange 4 to 12 core optical fibers in a row to form a ribbon optical fiber unit, and then multiple ribbon units as necessary. The way to display the cable, our network grade optical cable generally chooses the bundled type and the layered type.
Choose fiber optic cables according to the application
Choose the corresponding optical cable according to the use. According to the different uses, the optical cable can be divided into overhead optical cable, direct buried optical cable, pipeline optical cable, submarine optical cable and metal-free optical cable. Aerial optical cables require high strength and small temperature difference coefficient; direct buried optical cables require good burial resistance, compression resistance, moisture resistance, humidity resistance, and chemical erosion resistance; pipeline optical cables and submarine cables must be resistant to water pressure, tension, and waterproof characteristics; no The metal optical cable can be erected together with the high-voltage line, and the insulation is better. Although there is no iron reinforced core, it must also have the necessary tensile capacity. Therefore, when purchasing optical cables, users should choose according to the use of optical cables, and put forward requirements for manufacturers to ensure that the use of optical cables is fixed and reliable.
Select fiber optic cable according to material
The material used in the optical cable and the production process The selection of the optical cable material is the main factor related to the service life of the optical cable. The manufacturing process is the main link that affects the quality of the optical cable. Products with a fixed process and excellent quality are fundamentally not included in the additional optical fiber loss in the entire process of optical cable production. ≤0.01dB/km is the fundamental data to weigh the manufacturer's optical cable manufacturing process.
The main materials of optical cable are: fiber core, optical fiber ointment, sheath material, PBT (polybutylene terephthalate), they all have different quality requirements, and the fiber core requires greater power charging capacity , higher signal-to-noise ratio, lower bit error rate, longer extender spacing, higher information carrying capacity; optical fiber ointment refers to the ointment filled in the fiber bundle tube, its function is to prevent air The moisture erodes the fiber, and the second is to cushion the fiber, and the buffer fiber is affected by vibration or shock.
The ointment has strict quality requirements, emphasizing ultra-low hydrogen evolution, ensuring good low-heat characteristics of the optical cable, and preventing "hydrogen loss" from causing serious damage to the optical cable. The sheath material plays a very important role in the durability and reliability of the optical cable, and is the main factor in determining the tensile, flattening, bending characteristics, temperature characteristics, natural aging resistance (temperature, irradiation, chemical corrosion) characteristics of the optical cable, and the fatigue characteristics of the optical cable.
The above are the optical fiber selection skills brought to you by Xiaobian. In fact, optical cables have the advantages of light weight, small size, long transmission interval, large capacity, low signal attenuation, and anti-electromagnetic interference. They have been widely used in various networks.