Used for fiber butt splicing fiber or fiber splicing pigtail, this is equivalent to making a splice, and the thing used for this kind of cold splicing is called an optical fiber cold splice. Two technologies can be used for the termination of the optical cable: fusion splicing and cold splicing. The so-called cold splicing is the opposite of welding, which refers to the mechanical splicing of optical cables through "cold splicing", and the entire splicing process can be completed within 2 minutes. Using cold splicing technology, the splicing effect can be equivalent to that of fusion splicing, and the insertion loss can reach less than 0.1 dB. The matching liquid is added to the splicing port to reduce the return loss, and the return loss can reach less than −60 dB.
The optical fiber cold splice is used when two pigtails are butted. The main internal component is a precision v-shaped groove. After the two pigtails are pulled out, the cold splice is used to realize the butt connection of the two pigtails. It is easier and faster to operate, and saves time than using a fusion splicer.