Fiber optic cable fusion splicing end face preparation

The preparation of fiber optic endface includes stripping, cleaning and cutting. Qualified fiber optic endface is a necessary condition for fusion splicing, endface quality directly affects the quality of fusion splicing.

1.1 fiber optic coating layer stripping

Fiber optic coating layer stripping, to master the flat, stable, fast three words stripping method. "Flat", that is, hold the fiber to be flat. Left thumb and forefinger pinch the fiber, so that it becomes horizontal, the exposed length of 5cm shall prevail, the remaining fiber in the ring finger, small thumb between the natural bend to increase the strength, to prevent slippage. "Steady", that is, fiber stripping pliers to hold steady. "Fast" that is, stripping fiber to be fast, stripping pliers should be perpendicular to the fiber, the upper direction of the inward tilt at a certain angle, and then use the jaws of the fiber gently stuck in the right hand, and then exert force, along the optical fiber axial flat push out, the whole process should be natural and smooth, in one fell swoop.

1.2 Bare fiber cleaning

Bare fiber cleaning, should be operated in accordance with the following two steps:

1) Observe the fiber stripping part of the coating layer is all stripped, if there is any residue, should be re-stripped. If a very small amount of coating layer is not easy to peel off, can be used to cotton ball dipped in the appropriate amount of alcohol, while impregnated, while gradually wipe off.

2) Tear the cotton into a level fan-shaped small pieces, dipped in a little alcohol (to two fingers pinch no overflow is appropriate), folded into a "V" shape, clamped to the stripping of the optical fiber, along the fiber axial wipe, and strive for a success, a piece of cotton to be used 2-3 times to be replaced in a timely manner, each time you want to use the cotton of the different parts and levels, so as to improve the utilization of cotton, and to improve the quality of the coating. This will improve the utilization of cotton, but also to prevent the two pollution of the probe fiber.

1.3 bare fiber cutting

Bare fiber cutting is the most critical part of the fiber end face preparation, precision, excellent knife is the basis for strict, scientific operation specifications are guaranteed.

1) the choice of cutter.

The cutter has manual (such as Japan CT-07 cutter) and electric (such as Ericsson FSU-925) two kinds. The former is simple to operate, reliable performance, with the operator's level of improvement, cutting efficiency and quality can be greatly improved, and the requirement of a shorter bare fiber, but the cutter on the environmental temperature difference requires high. The latter cutting quality is higher, suitable for operation in the field under cold conditions, but the operation is more complex, the working speed is constant, and the bare fiber is required to be longer. Skilled operators at room temperature for rapid fiber optic cable splicing or rescue, the use of manual cutter is appropriate; on the contrary, beginners or in the field under the operation of colder conditions, the use of electric cutter is better.

2) operating specifications

Operators should be specially trained to master the essentials of action and operating specifications. First of all, to clean the cutter and adjust the position of the cutter, cutter placement should be smooth, cutting, the action should be natural, smooth, do not heavy, do not rush, to avoid fiber breakage, beveling, burrs and cracks and other bad end of the production. In addition to learn to "play the piano", reasonable distribution and use of their right fingers, so that it corresponds to the specific parts of the incision, coordination, improve cutting speed and quality.

3) Beware of end-face contamination

Heat-shrinkable tubing should be worn before stripping, and is strictly prohibited after end-face preparation. Bare fiber should be cleaned, cut and fused time should be closely linked, not too long an interval, especially to the preparation of the end face, do not put in the air. When moving, it should be held gently to prevent rubbing with other objects. In the succession should be based on the environment, the cutter "V" shaped groove, pressure plate, knife blade cleaning, to prevent end face contamination.