1 a line as far as possible with the same batch of high-quality brand-name bare fiber

For the same batch of fiber, the fiber mode field diameter is basically the same, at some point after disconnection, between the two mode field diameter can be regarded as consistent, thus breaking point welding can make the mode field diameter influence on optical fiber splicing loss is reduced to the lowest level. Therefore, the requirements of the same batch of fiber optic cable manufacturers of bare fiber, according to the requirements of the cable length of continuous production, in order to distinguish between the sequence number and B, A, no number. According to the number of cable laying along the route to determine the order and ensure the cloth on the front plate cable B side to a A cable and the rear end is connected, so as to ensure the connection when the disconnection point welding, and the splice loss reaches the minimum value.

2 optical cable set up as required

In the cable laying construction, no small circle and fold, twisted cable, 3km cable must be more than 80 people construction, 4km construction must be more than 100 people, and is equipped with 6 ~ 8 walkie talkie; also "walk heel, cable laying method of optical cable shoulder", can effectively prevent the occurrence of the hit the back button. Traction does not exceed 80% of the allowable cable, the moment of maximum traction is not more than 100%, the traction should be added to the strengthening of the cable. The application of the cable should be strictly in accordance with the requirements of the optical cable construction, so as to minimize the fiber optic cable construction in the construction of the probability of damage, to avoid damage to the fiber core caused by the loss of fusion.

3 to select the experienced and trained optical fiber splice

Now mostly welding welding machine automatic welding, but the following personnel directly influence the level of splice loss. The continuous personnel shall be in strict accordance with the process flow diagram of the optical fiber fusion welding process, and the connection loss of the weld joint should be tested on one side of the welding process in the welding process. Do not meet the requirements should be re fused, the splice loss value of the point, repeated welding times to 3 ~ 4 times is appropriate, a plurality of optical fiber splice loss are larger, can cut off a section of cable cable re welding.

4 continuous optical cable should be carried out in a clean and tidy environment

It is strictly prohibited to operate in dusty and humid environment, optical cable connection parts and tools, materials should be kept clean, do not let the fiber connector damp, ready to cut the fiber must be clean, no dirt. After cutting the fiber may not be exposed in the air for too long, especially in the dusty and humid environment.

5 selection of high precision fiber end cutter for preparation of fiber end

The fiber end face has a direct impact on the size of the weld loss, and the cutting of the fiber should be a flat mirror, no burr, no defect. The end face of an optical fiber axis angle should be less than 1 degrees, fiber end cutter with high precision can not only improve the success rate of fiber cutting, can also improve the quality of the optical fiber end surface. This is not a test of OTDR fusion point (OTDR test blind) and maintenance and grab Xiuyou important fiber.

The correct use of the 6 welding machine

The function of welding machine is the two optical fibers fused together, so the correct use of welding machine is an important measure to reduce the fiber connection loss. According to the type of fiber correctly set reasonable welding parameters, the pre discharge current, time and discharge current, the main discharge time, and timely removal of molten dust in machine use and after use, especially to remove dust and dust, the mirror and the optical fiber fixture V groove in the. The welding machine in the welding environment for at least fifteen minutes before each use, especially in placing and using different local environment (such as winter indoor and outdoor), according to the pressure, temperature, humidity and other environmental conditions, to set the welding machine discharge voltage and discharge position, and the groove drive reset V type adjustment.