Measures to reduce the fiber splice loss

1. A line as possible using the same batch of high-quality brand-name bare fiber For the same batch of fiber, which is basically the same mode field diameter fiber is disconnected at some point, the mode field diameter between the two ends can be considered the same, so at this point welding disconnect the fiber mode field diameter can splice loss minimize the impact. So they requested that manufacturers use the same batch of cable bare fiber, the fiber length required continuous production, in order of numbers on each plate and to distinguish between A, B-side, not dance number. The laying of fiber optic cable required to determine the routing number along the laying order, and ensure that the front panel cable to the B-side, and after a fiber optic cable connected to the A-side, in order to ensure continuation of the break point when welding, and to splice loss value reached a minimum.

 2. Cable set up according to the requirements of In the cable laying construction, is strictly prohibited to play a small circle and fold cables, twisted, 3km of cable construction must be 80 or more, 4km to more than 100 construction, and equipped with 6 to 8 radio; another "gone with the former, on cable shoulder" The release cable method, can effectively prevent the occurrence of fighting back button. Traction cable to allow no more than 80% of the maximum moment does not exceed 100% traction, traction should be added to the reinforcement on the cable. Dressing up cable fiber optic cable construction should be strictly in accordance with the requirements to a minimum to reduce the damaged fiber optic cable construction, the chance to avoid damage caused by the fiber core splice loss increases. 

3. Selection of experienced and trained personnel to follow the fiber splice Now most of the welding machine welding automatic welding, but the follow-level personnel splice loss directly affects the size. Personnel should follow strict accordance with process flow diagram for connecting optical fiber splicing and fusion welding process should be the side while welding points with OTDR splice loss test. Does not meet the requirements should be re-welding, the larger the value of the loss of fusion point, the number of repeated welding is appropriate to 3 to 4 times more fiber splice loss is large, a cable can be cut off to re-open cable splicing. 

4. Connecting cable should be in clean environment Prohibited in dusty and humid environments open operation, splice sites and tools, materials should be kept clean, damp not let fiber-optic connectors, ready to cut the fiber must be clean, without dirt. After cutting the fiber may not be exposed to air for too long, especially in dusty and humid environments.

5. Fiber selection of high precision cutter to prepare the fiber end face The quality of the fiber end splice loss directly affects the size of the fiber should be cut flat mirror, no glitches, no defects. The axis of the fiber end face angle should be less than 1 degree, high-precision optical fiber end face cutter cuts only increase the success rate, but also can improve the quality of the fiber end. This OTDR test vain weld point (ie OTDR testing blind spots) and fiber maintenance and repair is particularly important.

 6. Proper use of welding machine Function of welding machine is to weld together two fiber optic, so the proper use of welding machines also reduce the optical fiber splice loss of important measures. Correct and reasonable according to fiber type set welding parameters, pre-discharge current, time, and the main discharge current, the main discharge time, and in use and after use to remove welding machine in the dust, especially fixture, type of mirror and v very fine dust and fiber tank removal. Before each use to make welding machine welding environment for at least fifteen minutes, especially with the use of the environment in the place where the major differences (such as winter indoor and outdoor), according to the prevailing atmospheric pressure, temperature, humidity and other environmental conditions re-set the welding machine discharge voltage and discharge location, and the v-groove drive reset adjustment.