Optical fiber transmission has the advantages of transmission frequency bandwidth, large communication capacity, low loss, no electromagnetic interference, small optical cable diameter, light weight, and rich source of raw materials. Therefore, it is becoming a new transmission medium. Losses occur when light is transmitted through an optical fiber. This loss is mainly caused by the transmission loss of the optical fiber itself and the splice loss at the fiber joint. Once the optical fiber cable is ordered, the transmission loss of the optical fiber itself is also basically determined, and the splice loss at the fiber joint is related to the optical fiber itself and on-site construction. Efforts to reduce the splice loss at fiber splices can increase the optical fiber relay amplification transmission distance and increase the attenuation margin of the fiber link.
The cold connection of the optical fiber is used for the optical fiber docking fiber or the fiber docking pigtail, which is equivalent to making a joint. (Fiber docking pigtail refers to the fiber core and pigtail core but not the former). This kind of cold connection is called fiber optic cold connector. The fiber optic cold connector is used when two pigtails are mated. The internal main component is a precise v-groove. After the two pigtails are picked up, the cold connectors are used to connect the two pigtails. He is simpler and quicker to operate than welding with a welding machine saves time. Cold junctions generally have two forms: a first-in-the-field live linker; and a second fiber-optic cold junction. With the rapid development of FTTH fiber-to-the-home, the demand for fiber optic cold junctions has also greatly increased.
Fiber optic quick connector and fiber optic cold connector will play an irreplaceable role in FTTH access. The field termination technology of fiber optic quick connector just solves this problem. It does not need welding operation is convenient and fast, the connection cost is low, and the real access anywhere and anytime . For fiber optic docking fiber or fiber docking pigtails, this is equivalent to do the joints, (optical fiber docking pigtails refers to the fiber and pigtail fiber core but not the former said tail fiber head) for this cold connection The thing is called optical fiber cold connector. The fiber optic cold connector is used when two pigtails are mated. The internal main component is a precise v-groove. After the two pigtails are picked up, the cold connectors are used to connect the two pigtails. He is simpler and quicker to operate than welding with a welding machine saves time. The welding of optical fiber cables by fusion welding is a meticulous task, especially in the aspects of end face preparation, fusion welding, fiber optics, etc., requiring operators to carefully observe, carefully consider, and operate specifications. Losses occur when light is transmitted through an optical fiber. This loss is mainly caused by the transmission loss of the optical fiber itself and the splice loss at the fiber joint.
Once the optical fiber cable is ordered, the transmission loss of the optical fiber itself is also basically determined, and the splice loss at the fiber joint is related to the optical fiber itself and on-site construction. Efforts to reduce the splice loss at fiber splices can increase the optical fiber relay amplification transmission distance and increase the attenuation margin of the fiber link. The difference between cold-welding and fusion welding requires the use of a fusion splicer and an optical fiber cutter. The two fibers are connected and no other auxiliary material is required. The advantages are stable quality and low splice loss (about 0.03 to 0.05). Disadvantages are that the equipment costs are too high, the equipment has limited power storage capacity, and field operations are limited. Cold connection does not require too much equipment, fiber cutters can be. But each contact requires a quick connector (it can be said that the future mainstream operation), about 5 to 10 yuan.
The advantages are easy to operate and suitable for field operations. The disadvantages are relatively large, about 0.1 to 0.2 dB per point. "Cold harvester" currently has fewer manufacturers that can be directly produced in China, and the cost is higher. There is no room for selection in business and technical services, followed by the use of matching liquids in cold picks, due to less use, short time, and aging. Problems require the test of time.
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