Manufacturing method of hermetic optical fiber

Abstract

The invention discloses a method for manufacturing an airtight optical fiber, comprising the steps of: 1) pretreatment of the optical fiber (401); 2) arranging the part of the optical fiber (401) from which the coating layer is removed in the intermediate metal pipe (201) and add glass solder (501) between the intermediate metal tube (201) and the optical fiber (401); 3) set one end of the intermediate metal tube (201) with a front metal tube, and Epoxy glue (301) is filled between the front metal tube (202) and the optical fiber (401); 4) the other end of the middle metal tube (201) is provided with a rear metal tube, and the rear metal tube ( 203) filling epoxy glue (301) with the optical fiber (401); 5) placing it in a high and low temperature circulation box for circulation. The manufacturing method of the airtight optical fiber provided by the embodiment of the present invention effectively improves the sealing effect.

Description

technical field [0001] The invention relates to the technical field of optical fiber manufacturing, in particular to a method for manufacturing an airtight optical fiber. Background technique [0002] With the rapid development of technology and economy, optical networks spread all over the world. Among them, a considerable number of optical networks are used in the field. In order to avoid the impact of the field environment and climate, the optical network needs to use high-reliability optical devices. [0003] Taking lasers and photodetectors used in optical networks as an example, they must be kept away from moisture, otherwise they are extremely prone to failure. To solve this problem, the laser and photodetector need to be sealed. However, both lasers and photodetectors rely on optical fibers to pull light out or in. Therefore, highly reliable hermetic sealing of optical fibers is required. [0004] Please refer to figure 1 , figure 1 It is a structural schematic...

AI Technical Summary

Problems solved by technology

However, the process of gold-plating the optical fiber is complicated, which directly leads to high cost

At the same time, if the gold-plated optical fiber and other devices are soldered with solder, if they are soldered again, the heat conducted will cause the solder to soften, which will cause the device to seal the optical fiber to shift, thereby affecting the insertion loss of the optical path, and the sealing effect is not high.

[0006] like figure 2 As shown, the manufacturing method of the second airtight optical fiber is: first strip off the coating layer of the optical fiber 10, and then use epoxy glue 11 to seal the optical fiber, but the thermal expansion coefficient of the epoxy glue 11 is different from that of the metal shell 12 Larger, in extreme weather conditions, epoxy glue 11 is very easy to peel off from the metal, resulting in poor airtightness

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