Optical fiber welding method

Abstract

The invention provides an optical fiber welding method, which comprises the following steps of: aligning a first optical fiber and a second optical fiber, and welding the end surface of the first optical fiber and the end surface of the second optical fiber through arc first discharge; and moving the second optical fiber, and changing the optical channel and the core diameter of the first optical fiber through electric arc secondary discharging, so that the optical channel of the first optical fiber is matched with the optical channel of the second optical fiber, and the core diameter of the first optical fiber is matched with the core diameter of the second optical fiber. According to the optical fiber fusion splicing method provided by the invention, accompanying discharge is added, that is, after fusion splicing is completed, a section of optical fiber of the fiber core with a small size is discharged again through the optical fiber fusion splicing system, the core diameter of the fiber core is properly enlarged, and the optical channel of pump light is widened, so that the fiber core can be better matched with the fiber core with a large fusion splicing size; and therefore, the effect of reducing the welding error is achieved, and the problem of high light temperature of the missing cladding caused by welding deviation is reduced.

Description

technical field [0001] The invention relates to the technical field of optical fiber and cable, in particular to an optical fiber fusion splicing method. Background technique [0002] In the production process of conventional pulsed fiber lasers, 20 / 250 passive fibers and 30 / 250 doped active fibers are often spliced. Since the core sizes of the two optical fibers are different, and the doping concentration media of the two fibers are also different, if the conventional fusion splicing method is adopted, that is, the two are directly fused together, it will inevitably lead to loss at the splice point. Large; and the fusion point is easy to leak light to the cladding, resulting in high temperature on the cladding dispensing surface. Over time, the heat accumulates in the glue layer, which is easy to burn out the glue layer, thereby reducing the welding quality of the pulsed fiber laser. Contents of the invention [0003] The invention provides an optical fiber fusion splici...

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Problems solved by technology

[0003] The invention provides an optical fiber fusion splicing method to solve the problem of poor fusion splicing quality between optical fibers with different core diameters and / or different geometric structures in the prior art

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