How to continue optical fiber

The continuation of optical fiber

(1) Fiber continuity. Optical fiber connection should be followed by the principle: when the core number is equal, to the same beam tube of the corresponding color optical fiber docking, the core number is not at the same time, in order to connect the core number of large, and then the core number of small.

(2) Optical fiber connection methods are: welding, active connection, three kinds of mechanical connections. In the engineering most of the use of fusion method. The contact loss with this method is small, the reflection loss is large and the reliability is high.

(3) The process and the steps of the optical fiber continuity:

① Open and peel the optical cable and fasten the cable to the continuous box. Pay attention not to the bundle tube, open stripping length of 1m or so, with toilet paper will be wiped clean ointment, will cable into the continuous box, fixed wire must be tight, can not loose. Otherwise, it is possible to cause fiber optic cable rolling broken core.

② the fiber through the heat-shrinkable tube. Separate the different beam tubes, the different colors of the fiber, through the heat shrinkable tube. Peeling the coating layer of fiber is very fragile, the use of heat shrinkable tube, can protect the fiber-optic splice.

③ Open the ancient river S176 welding machine power supply, the use of preset 42 programs for welding, and in the use and timely removal of the dust in the welding machine, especially the fixture, the mirror and V-groove in the dust and fiber broken. The optical fiber used in CATV has conventional single-mode fiber and dispersion-shifted single-mode fiber, and its working wavelength has 1310nm and 1550nm two kinds. Therefore, in accordance with the system to use the optical fiber and working wavelength to select the appropriate welding procedures. If there is no special circumstances, the general selection of automatic welding procedures. ---computer science (www.bianceng.cn)

The ④ makes the fiber end face. The production of optical fiber end will directly affect the quality of the connection, so in the weld must be qualified before the end face. Peel off the coating layer with a special stripping clamp, again with alcohol cleaning cotton in bare fiber wipe several times, force to moderate, and then use precision fiber cutter cutting fiber, 0.25mm (external coating) fiber, cutting length for 8mm-16mm, 0.9mm (outer coating) fiber, cutting length can only be 16mm.

⑤ Place the fiber. Put the fiber in the V-groove of the welding machine, carefully press on the fiber plate and fiber clamp, according to the fiber cutting length set the fiber in the platen position, close the wind cover, you can automatically complete the weld, just 11 seconds.

⑥ the heat shrinkable pipe by heating furnace. Open the wind cover, remove the fiber from the welding machine, then place the heat shrinkable tube in the bare fiber center, and put it in the heating furnace. The heater can use 20mm miniature heat shrink sleeve and 40mm and 60mm general heat shrinkable casing, 20mm heat shrink tube takes 40 seconds, 60mm heat shrink tube is 85 seconds.

⑦ plate Fiber Fixed. will be a good optical fiber disk to the fiber-optic reception plate, in the disk fiber, the radius of the coil larger, the greater the radian, the loss of the entire line is smaller. So be sure to maintain a certain radius, so that the laser transmission in the core, avoid some unnecessary loss.

⑧ seals and hangs. The field continues the box must be sealed well, prevents the water. After the weld box is flooded, the fiber and optical fiber fusion contacts are immersed in the water for a long time, which may cause some fiber attenuation to increase first. Put on the stainless steel hook and hang on the puppet. So far, the fiber fusion is complete.