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What are the common questions about fiber optic cables?

What are the common questions about fiber optic cables?


1. What do 62.5/125, 50/125 and 9/125 refer to in optical fiber?

Answer: 62.5/125 means the outer diameter of the core is 62.5µm, the outer diameter after adding the coating layer is 125µm, 50/125 means the outer diameter of the core is 50µm, and the outer diameter after adding the coating layer is 125µm, and 9/125 means that the outer diameter of the core is 9µm, and the outer diameter after coating is 125µm.

2. What is unarmored, what is armored, and what is heavy armor?

Answer: 1. Non-armoured means that there is only one metal layer, either aluminum tape or steel tape. 2. Light armor refers to two layers of metal layers, such as: an inner layer of aluminum tape and a layer of steel tape outside. 3. Heavy armor means that there are two layers of metal layers, and a layer of PE sheath is added between the two layers of metal layers.

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3. What are the specific differences between the use environment of layered stranded fiber and central bundled fiber, and how to choose fibers with different structures?

Answer:  Both are outdoor optical cables. 1. The state defines that each loose tube can accommodate up to 12 cores, and the structure of the central bundle determines that there is only one loose tube in the center of the optical cable, so the central bundle can only achieve 12 cores ( At present, some manufacturers make 24-core, but 24-core does not meet the standard, we do not recommend). Its price is relatively cheap, so we recommend using the central beam tube type within 12 cores. 2. The layered structure is a middle reinforcing steel wire, surrounded by one or more loose tubes, so the layered structure can support specifications with more than 12 cores. At present, our company can support the production of optical cables with a maximum of 144 cores. 

4. What factors will affect the use of optical cables in the actual construction process?

Answer: 1. The attenuation of the optical cable will also increase when it is subjected to tension, pressure, bending, or hydrogen loss caused by contact with moisture. 2. During construction, the optical cable is hard-pulled, and even the optical cable is pulled out when the optical cable reel is seriously damaged. Therefore, the optical cable is often twisted, stretched and deformed, and the outer skin is scratched. Quality accidents such as fiber breakage will occur in serious cases. This greatly affects the use of fiber optic cables. 3. It is also wrong to have too small bending radius during construction, which is easy to cause excessive refraction loss and increased dispersion. If the time is long, fiber breakage may also occur. At the same time, if the bending radius is too small, it will cause the optical cable sleeve or the central strength member (steel wire) Discounting, twisting of the optical cable; cracking of the sheath or even the steel/aluminum tape, deformation of the optical cable core, etc., will damage the optical cable and cause physical changes. The OTDR test often appears steps in the non-connector position, while the outer sheath of the optical cable has no obvious traces. Dissection of the cable revealed that the sleeve was significantly squashed.

5. How to troubleshoot fiber link faults?

Answer: 1. Re-clean all the tested links and the connector end face of the reference jumper. Reconnect, making sure all connectors are fully inserted into the fiber optic adapter. 2. Check whether the bending radius of the optical cable and jumper meets the standard requirements, especially whether the bending radius of the cable in the optical fiber box is too small. 3. Re-test, if it still can't pass, re-splicing pigtails for splicing mode, replace connector in termination mode, and then perform a new test. 4. If it has not passed, the fiber optic cable itself may be damaged. What is the difference between fiber optic adapters and fiber optic patch panels ST, SC, LC, FC fiber optic connectors?

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