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Easy to understand, understand the difference between fiber and cable

2019-12-18  20

The main component of the optical fiber is glass fiber. The main component of the glass junction is high-purity silicon dioxide. The optical fiber preform is fired at 1500 degrees Celsius. The optical fiber preform is made and put into a drawing furnace for uninterrupted operation. After drawing a length of 7,500 kilometers, clean up an annealing tube to prevent impurities and dust from falling on the optical fiber. It will melt into a soft embryo at a high temperature of 2200 degrees Celsius. After passing through the 1-meter annealing tube, it will gradually cool to a 0.1 mm diameter Of the glass fiber, the take-up machine rotates to pull the fiber and complete the collection of the fiber. Optical cable, in general speaking, is to pass more than one optical fiber through the post-processing jacket and protect it layer by layer, so that the optical fiber can be transmitted in outdoor and indoor environments, and it is not easy to disconnect, so that the optical fiber can adapt to various different environments.

In general, we will encounter the laying of indoor and outdoor optical fibers in integrated wiring. Indoor optical fibers are mainly used in the laying of horizontal subsystems and vertical backbone subsystems. The outdoor optical fiber is mainly used for the wiring of the building subsystem. With the development of science and technology, higher and newer requirements have been put forward on optical fibers.

Today, the editor of 100 Weier Education introduced 100 Wier Education's "Integrated Cabling Technology" course and its simulation resources to introduce the problems needing attention in indoor fiber laying.

First we look at the installation steps of optical fiber

1. Measure the length, peel the fiber, and remove the fiber jacket.

2. Clean and remove the petroleum filling paste in the optical fiber.

3. Bundle the optical fibers.

4. Check the number of fiber cores, perform fiber pairing, and check whether the fiber color label is correct.

5. Strengthen the core connection.

6. Various auxiliary line pairs, including service line pairs, control line pairs, shielded ground lines, etc.

7. Connection of optical fiber.

8. Protective treatment of optical fiber connector.

9. Reservoir disposal of surplus fiber.

10. Complete the splicing of the optical fiber jacket.

11. Protection of optical fiber connector.

So, what should be done for indoor fiber wiring and welding?

1. Use a nut to screw the end of the ST-head fiber adapter through, and align the end of the SC-head single-mode fiber jumper with the gap of the SC-head fiber adapter and snap into the SC-head fiber adapter.

2. Measure the proper length, peel off the fiber outer cover with fiber strippers, and then cut off the exposed cotton with multi-functional scissors.

3. Separate the optical fibers with different colors from different bundle tubes and pass one of them through the heat shrink tube. A special optical fiber stripper equipped with an optical fiber splicer is used to peel off the plastic layer and coating on the indoor multimode optical fiber core. Then press the cleaning cotton on the alcohol pump, apply alcohol, and wipe the cleaning cotton around the bare fiber several times to ensure that the protective film of the coating layer is wiped clean and the force is moderate.

4. Use a precision instrument fiber cutter to cut the fiber, the cutting length is generally 10-15cm

5. Turn on the power of the optical fiber fusion splicer and use the preset program for fusion splicing. Place the cut optical fiber cores in the V-shaped grooves on both sides of the fusion splicer, and carefully cover the fiber clamps and fiber clamps. Set the position of the fiber in the clamp according to the fiber cutting length. Generally, the cut surfaces of the butted fibers are basically close to the electrodes Tip position.

6. Measure out the appropriate length, peel off the fiber outer cover with fiber strippers, and then cut off the exposed cotton with multi-functional scissors. Use a special optical fiber stripper equipped with an optical fiber splicer to peel off the plastic layer and coating on the indoor multimode fiber core. Wipe the bare cotton with cleaning cotton several times to ensure that the protective film on the coating is wiped clean. Use moderate force. Use a precision instrument fiber cutter to cut the fiber. The cutting length is generally 10-15cm. Put another cut fiber into the other side.

7. Cover the windshield and press the "RUN" key to complete the welding automatically. After fusing, open the draft shield and fiber clamp, carefully remove the fiber from the fusion splicer, and move the heat shrink tube until the bare fiber is completely covered.

8. Open the cover of the heating furnace and place the heat-shrinkable tube in it. Press the "HEAT" button to heat until the indicator light goes out. Open the cover of the heating furnace and remove the optical fiber. This fiber is spliced. Pass the cable ties into several holes of the disk box. The indoor single-mode multi-mode fiber, SC head single-mode fiber jumper, and ST head multi-mode fiber are placed in the cable ties and fixed to the disk box. Finally, close the covers of the fiber tray and the fiber distribution frame, and use a screwdriver to tighten the screws.

In integrated wiring, the main factors affecting the attenuation of optical fiber signals are internal and external factors. The attenuation of internal factors is related to the fiber material, which is achieved by purchasing high-quality fiber products. The external factors are related to the construction of the optical fiber wiring. Because the optical fiber is deformed during the construction, the coupling loss between the optical fiber and the light source, and the connection loss between the optical fibers can be reduced during the construction process.