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Optical fiber fusion step and method of operation
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Optical fiber fusion step and method of operation

Optical fiber fusion splicing is an important process in engineering in optical fiber transmission system capacity is the largest, most complex technical requirements, its quality directly influences the transmission quality and reliability of optical fiber line. Effective method and proper welding procedure is extremely important.

Optical fiber fusion splicing method generally have fused, movable connection, mechanical connection three. The basic use of welding method in practical engineering, because the node loss splicing method, reflection loss, high reliability.

1, optical cable fusion should follow the principle of joint

Core number is the same, and to the corresponding color fiber bundle tube; core number is not the same, in order to weld large core number followed by a small number of cores, common cable has stranded, skeleton and center tube type optical cable, fiber core colors sequentially divided into blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, blue. Multi core optical fiber to fiber of different colors in the same bundle as a group, such a cable lining may have several bundles. Facing the cable cross section, the red beam tube fiber optic cable bundle as first, clockwise green, white 1, white 2, white 3 etc..

The process, melting the first step 2 cable, optical cable and optical cable stripping, fixed to the connecting box. In the fixed multi beam tube layer type cable due to the layered disk fiber, the beam pipe should be orderly placed, so as not to tangle. The cable is penetrated into the connection box, must press wire fixed, not loose. Otherwise, may cause cable roll core. Take care not to hurt the tube bundle, taking stripping length of 1 meters, with the toilet paper to wipe clean the cream.

The second step, the optical fiber through the heat shrinkable tube. The different bundles, different color fiber separately, through the heat shrinkable sleeve. Stripped of smear layer cable fragile using heat shrinkable sleeve, can protect the optical fiber connector.

The third step, open the welding machine power supply, select the appropriate welding mode. Power supply welding machine with DC and AC two, according to the type of power supply current to the reasonable switch. Every time before using a fusion splicer, should make the welding machine in the welding place for at least 15 minutes. According to the optical fiber type set welding parameters, the pre discharge time, time and discharge time, discharge time. If no special circumstances, the general choice of bonding process using automatic welding. The single-mode fiber dust removal dust and timely in use and after use.

The fourth step, making the optical fiber end. The optical fiber end production will directly affect the quality of the connection, so in the weld must well qualified end.

The fifth step, bare fiber cleaning cotton ripped into the flat surface of the small, stick a little alcohol, optical fiber has been peeling clamp cover, along the axial direction of the optical fiber to wipe, forced to moderate, every time you want to use the cotton of different parts and level, which can improve the use efficiency of cotton.

The sixth step, the cutting of bare fiber, first clean the cutter and the adjustment of the cutter location, cutting knife to display smooth, cutting, action to be natural, smooth, not heavy, do not light. To avoid the broken fiber, angle, burr and cracks and other bad end.

The seventh step, the placement of optical fiber placed in the V shaped groove welding machine, pressure plate and carefully fiber fiber fixture, according to set the length of optical fiber in the platen position fiber cutting, shut the wind hood, according to the weld bond can automatically complete fusion splicer, the screen will show the estimated the value of loss.

The eighth step, remove the optical fiber fusion splicer for reheating furnace.

The ninth step, and the fixed disk fiber. Disk fiber scientific method can make the optical layout is reasonable, the additional loss is small, can withstand time and harsh environment test, can avoid to fiber broken phenomenon because of the backlog. In the disc tray fiber to fiber, the greater the radius, the greater the loss of the entire line arc is smaller. So, must maintain a certain radius, the laser transmission in the fiber core, to avoid some unnecessary loss.

The tenth step, the sealing connection box. Field connection boxes must be sealed. If connection box inlet, due to optical fiber and optical fiber fusion point in water for a long time, may cause the increase of optical fiber attenuation.


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