Working principle of optical fiber fusion splicer

Posted by sere on March 17th, 2020

Optical fiber fusion splicer is mainly used in major telecommunication operators, engineering companies, private networks of enterprises and institutions, etc. It is also used in the production of optical fiber fusion splices for passive and active devices and modules.

Fusion splicing is an important process with the largest amount of engineering and the most complicated technical requirements in optical fiber transmission systems. Its quality directly affects the transmission quality and reliability of optical fiber lines. It is extremely important to carry out effective methods and correct welding procedures.

There are three welding methods: welding, movable connection and mechanical connection. In actual engineering, the fusion method is basically used because the node loss of the fusion method is small, the reflection loss is large, and the reliability is high.

The basic working principle of the fusion splicer is as follows:

1. Alignment: At present, the fusion splicer aligns the cores of two optical fibers, and finds the core of the optical fiber through the CCD lens.

2. Discharge: The two electrode rods release a momentary high voltage (a few thousand volts, but it is a short moment) to achieve the effect of puncturing the air. After the puncturing of the air, an instantaneous arc will occur, and the arc will generate high temperature. The front ends of the two optical fibers are melted. Because the optical fiber is made of silicon dioxide, which is usually called glass (of course, the purity of the optical fiber is much higher), it is easy to reach the molten state, and then the two optical fibers are pushed forward slightly, so The two fibers are glued together.