When light is transmitted in the optical fiber, it will generate loss, which is mainly composed of the transmission loss of the optical fiber itself and the splicing loss at the optical fiber joint. Efforts to reduce the splicing loss at the fiber joint can increase the transmission distance of the fiber relay amplification and improve the attenuation margin of the fiber link.
1. Cold fusion splicing of optical fiber
It is used to connect optical fiber or fiber butt pigtail, which is equivalent to making a joint (fiber butt pigtail refers to the butt joint of optical fiber and the core of the pigtail, not the pigtail head mentioned in the former), and is used for this cooling connect. Something called a fiber optic cold fusion splicer. The optical fiber cold fusion splicer is used when two pigtails are butted. The main component inside is a precision V-groove. After the two braids are pulled, use a cold splicing machine to realize the butt joint of the two braids. Compared with welding with a welding machine, it is easier, faster and less time-consuming to operate. There are generally two forms of cold splicing: the first on-site quick connector; the second type of cold fusion is used for optical fiber butt joints.
With the rapid development of FTTH fiber to the home, the demand for optical fiber cold fusion has also greatly increased.
Fiber optic quick connectors and fiber optic cold fusion splicers will play an irreplaceable role in FTTH access. The field termination technology of optical fiber quick connector just solves this problem. No welding is required, the operation is convenient and quick, and the connection cost is low, so it can be connected anytime and anywhere.
It is used to connect optical fiber or fiber butt pigtail, which is equivalent to making a joint (fiber butt pigtail refers to the butt joint of optical fiber and the core of the pigtail, not the pigtail head mentioned in the former), and is used for this cooling connect. Something called a fiber optic cold fusion splicer. The optical fiber cold fusion splicer is used when two pigtails are butted. The main component inside is a precision V-groove. After the two pigtails are pulled out, use a cold splicer to connect the two pigtails. Compared with welding with a welding machine, it is easier, faster and less time-consuming to operate.
2. Optical cable welding
Fiber optic cable fusion is a meticulous work, especially in the aspects of end face preparation, fusion, fiber coil, etc., requiring the operator to observe carefully, consider carefully, and standardize the operation.
When light is transmitted in the optical fiber, it will generate loss, which is mainly composed of the transmission loss of the optical fiber itself and the splicing loss at the optical fiber joint. Once the optical cable is ordered, the transmission loss of the optical fiber itself is basically determined, and the fusion loss at the optical fiber joint is related to the optical fiber itself and on-site construction. Efforts to reduce the splicing loss at the fiber joint can increase the transmission distance of the fiber relay amplification and improve the attenuation margin of the fiber link.
3. The difference between cold splicing and welding
hot melt adhesive
A fusion splicer and fiber cutter are required. To connect two optical fibers, no other auxiliary materials are required. The advantages are stable quality and low splice loss (about 0.03-0.05). The disadvantage is that the cost of the equipment is too high and the storage capacity of the equipment is limited. Field work loves the limit.
cold link
It does not require much equipment, just a fiber cutter. But each contact needs a quick connector (it can be said to be the mainstream operation in the future). About 5 to 10 yuan. The advantage is that it is easy to operate and suitable for field work. The downside is that the loss is local, about 0.1 to 0.2dB per point. "Cold joints" At present, there are few domestic manufacturers that can directly produce, the cost is high, and there is no choice in terms of business and technical services. The second is to use supporting liquid in cold joints. Due to the small amount and short time, the aging problem needs time to test .
