In general, the performance of evaluating the quality of optical cable includes: optical transmission performance, mechanical performance, and environmental performance. The optical transmission performance of an optical cable is determined by the type of fiber used in the optical cable. The mechanical and environmental properties of the fiber optic cable depend on the structure of the fiber optic cable, the type of material selected and its quality, and the level of fiber optic cable manufacturing technology.
At present, domestic optical fiber cable manufacturers are adopting a method of reducing the size of the loose tube to reduce the amount of optical cable materials, thereby reducing the cost of the optical cable, thereby improving market competitiveness. However, the author of this article would like to draw the attention of users to the fact that you should focus on the temperature cycling test of the optical cable when measuring the optical cable, and measure the temperature attenuation performance of the optical fiber.
If this kind of optical cable is used in places with frequent lightning and interference current, the metal reinforcement should be made of all-dielectric glass fiber reinforced plastic / epoxy rod, and a UV-curable "friction coating" should be applied on the outside of the rod to A good mechanical coupling force is formed between the rod and the sheath. The reader should pay special attention to this: In order to prevent water from flowing between the outer sheath and the cable core, the standard high-level water-absorption expansion water-blocking tape for the cable core is wound on a polypropylene loose tube. The reason why HDPE is used for the outer sheath of this type of optical cable is that HDPE has good hardness, strength and small coefficient of friction, so that it meets all optical cable installation performance requirements.
