How to operate optical fiber fusion in weak current engineering construction

Step 1: peel off the optical cable and fix the optical cable into the junction box. When fixing multi bundle tube layer optical cable, due to the layered fiber winding, each bundle tube shall be placed in order to avoid entanglement. Thread the optical cable into the junction box, and fix the steel wire tightly without looseness. Otherwise, the optical cable may roll the core. Be careful not to damage the tube bundle. Take about 1m of stripping length and wipe the ointment with toilet paper.

Step 2: pass the optical fiber through the heat shrinkable tube. Separate the optical fibers of different tube bundles and colors and pass through the heat shrinkable sleeve. The optical cable stripped of the coating layer is very fragile. The use of heat shrinkable sleeve can protect the optical fiber connector.

Step 3: turn on the power supply of the welding machine and select the appropriate welding method. The power supply of the welding machine includes DC and AC, which should be switched reasonably according to the type of power supply current. Before each use of the welding machine, the welding machine shall be placed in the welding environment for at least 15 minutes. According to the type of optical fiber, set the welding parameters, pre discharge time, time, main discharge time, main discharge time, etc. If there are no special circumstances, the automatic welding procedure is generally selected. Dust and fiber debris in the welding machine shall be removed in time during and after use.

Step 4: make optical fiber end face. The fabrication of optical fiber end face will directly affect the connection quality, so qualified end face must be made before welding.

Step 5: clean the bare fiber, tear the cotton into flat pieces, stick a little alcohol, clamp the stripped optical fiber, wipe along the axial direction of the optical fiber, and use different parts and layers of cotton each time, so as to improve the utilization rate of cotton.

Step 6: for the cutting of bare fiber, first clean the cutter and adjust the position of the cutter. The placement of the cutter should be stable. When cutting, the action should be natural and stable, not heavy or light. Avoid fiber breakage, bevel, burr, crack and other bad end faces.

Step 7: place the optical fiber, place the optical fiber in the V-shaped groove of the welding machine, carefully press the optical fiber pressing plate and optical fiber clamp, set the position of the optical fiber in the pressing plate according to the cutting length of the optical fiber, close the wind shield, press the welding key to automatically complete the welding, and the estimated loss value will be displayed on the display screen of the welding machine.

Step 8: remove the optical fiber and heat it with the heating furnace of the welding machine.

Step 9: reel the fiber and fix it. The scientific fiber winding method can make the fiber layout reasonable, with small additional loss, stand the test of time and harsh environment, and avoid the phenomenon of fiber breakage caused by backlog. During fiber winding, the larger the radius of fiber winding is, the greater the radian is, and the smaller the loss of the whole line is. Therefore, we must maintain a certain radius to avoid some unnecessary losses when the laser is transmitted in the fiber core.

Step 10: seal the junction box. The field connection box must be sealed. If water enters the junction box, the attenuation of optical fiber may increase due to the long-term immersion of optical fiber and optical fiber fusion joint in water.