Although optical fiber is widely used for long-distance transmission in integrated wiring, not many people have a deep understanding of its purchase. Today, we will explain to you how to choose high-quality optical fiber products from the aspects of optical fiber structure, materials, and craftsmanship.
Tip 1. Select fiber optic cable according to the material
Materials used in optical cables and production process The selection of optical cable materials is the key to the service life of optical cables. The manufacturing process is an important link that affects the quality of optical cables. Products with stable processes and high quality are basically not included in the additional loss of optical fibers during the entire process of optical cable production. ≤0.01dB/km is the basic data to measure the manufacturing process level of manufacturers’ optical cables. . The main materials of optical cable are: fiber core, fiber optic ointment, sheath material, PBT (polybutylene terephthalate), they all have different quality requirements, and the fiber core requires a large power charging capacity. Higher signal-to-noise ratio, lower bit error rate, longer amplifier spacing, higher information carrying capacity; optical fiber ointment refers to the ointment filled in the optical fiber bundle tube, its function is to prevent moisture in the air Erosion of the optical fiber, the second is to act as a cushion for the optical fiber to buffer the optical fiber from vibration or impact.
Tip 2. Select 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 beam tube type, layer twisted type, skeleton type and ribbon type. Different structures are different for different purposes. Users can put forward corresponding requirements according to the line conditions. Generally, the central beam tube type is used for the cores below 12. The center beam tube type has a simple process and low cost, and is competitive in the overhead laying or branch network with good pipeline protection; Steel wire reinforcement, using SZ continuous synthetic cable, the number of cables can reach 144 cores. Its biggest advantage is waterproof, anti-strong pulling force, strong side pressure. Can be used for direct burial. At the same time, it is easy to fork, that is, when some optical fibers of the optical cable need to be used separately, it is not necessary to disconnect the entire optical cable, but only need to disconnect the optical fiber to be bifurcated, which is very important for data communication networks. It is beneficial to add optical nodes along the cable TV network; the number of cores of the ribbon cable can be thousands of cores. It arranges 4 to 12 core optical fibers in rows to form a ribbon optical fiber unit, and then connects multiple ribbon units according to a certain Arranged into cables, our network-level optical cables generally use two types: bundle tube type and layered type.
Tip 3. Choose fiber optic cable according to the purpose
Choose the corresponding optical cable according to the purpose 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 a small temperature difference coefficient; direct-buried optical cables require good resistance to burial, compression, moisture, humidity, and chemical erosion; pipeline optical cables and submarine optical cables must withstand water pressure, tension, and waterproof properties; Metal optical cables can be erected together with high-voltage lines, and the insulation is better. Although there is no iron reinforcement core, it must also have a certain tensile capacity. Therefore, when purchasing an optical cable, the user should choose according to the use of the optical cable, and put forward requirements to the manufacturer to ensure that the optical cable is stable and reliable.
To sum up, the purchase of optical fiber is far more complicated than coaxial cable, and it cannot be simply measured by the price of several cores, but should be comprehensively based on the structure of the optical cable, the selection of raw materials, production technology and technical indicators. Considering that we should not just choose products that are too cheap. Because I have to consider many aspects, not only its service life, but also the standard of the entire engineering performance.
Post time: Feb-28-2023