FTTH Cable Should be Tight buffer or Loose Tube
The degree of loose tube and tight buffer is a certain standard. Excessive tight buffer will affect the attenuation index of the optical fiber. In general, the tightness test is to remove the 200mm optical fiber from the end of the 500mm sample and it can be completely exposed and separated, and the optical fiber coating cannot It is damaged, and the fiber cannot be pulled out of the remaining 300mm line.
In addition, if the fiber is stripped with a peeler, the jacket can be easily peeled off and the fiber head must be intact and the surface coating must be severely damaged. So you only need to Control is within this range. Don't be too extreme. When you hear feedback, it is done very tight. As a result, it increases the difficulty of production!
The use of the 657 fiber is due to its smaller bending radius, especially when it is connected in an information panel. Since the space is small, it is easy to cause the cable to have too small deflections and bends. Therefore, the G657 fiber should be used.
1, the jacket of optical cable mostly single-core, dual-core structure, can also be made of four-core structure, the cross-section is 8-shaped, the reinforcement is located in the center of the two circles, can be metal or non-metallic structure, optical fiber is located in the 8-shaped Geometric center. 2. The fine fiber is encapsulated in a plastic sheath so that it can bend without breaking. In general, an emitting device at one end of an optical fiber transmits a light pulse to an optical fiber using a light emitting diode (LED) or a laser beam, and a receiving device at the other end of the optical fiber uses a photosensitive element detection pulse. 3. In daily life, optical fiber is used as a long-distance information transmission because the conduction loss of light in the optical fiber is much lower than the loss of electricity in the conduction of the electric wire.
