Preparation method and preparation equipment of optical fiber preform

Abstract

The invention relates to a preparation method and preparation equipment of optical fiber preform. The preparation method comprises the following steps: after precisely heating an optical fiber preform material ingot, setting the upper alarm limit and the lower alarm limit of extrusion force, acquiring and controlling the extrusion force applied to the optical fiber preform material ingot in real time, when formed optical fiber preform is discharged from the outlet of an optical fiber preform mold, annealing, clamping and dragging the formed optical fiber perform until the formed optical fiber preform is dragged downwards and meets an expected target length, thereby obtaining an expected optical fiber preform product. By adopting the preparation method, the optical fiber preform is prevented from being bent, precise control on the preparation process of the optical fiber preform is achieved, and the preparation efficiency of the optical fiber perform is improved.

Description

technical field [0001] The invention relates to the field of preparation of optical fiber preforms, in particular to a preparation method and equipment for optical fiber preforms. Background technique [0002] Optical fiber, also known as optical fiber, is a fiber made of glass or plastic that can be used as a communication transmission tool. made of quartz glass (SiO 2 ) made of silica fiber plays a vital role in the field of communication. However, with the continuous extension and deepening of research and application fields, a number of special optical fibers with special substrates, special structures, and special optical properties have been discovered one after another. These optical fibers have great potential application value in sensing, infrared transmission and other fields. As the core raw material for manufacturing optical fibers, optical fiber preforms can be drawn into optical fibers with a specific rod-like structure. When manufacturing an optical fiber, ...

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Problems solved by technology

However, the structure of the mold used in the method used in this patent is simple, and it is difficult to shape the optical fiber preform during the preparation process. At the same time, the pushing mechanism of the extruder cannot accurately control the extrusion speed of the preform.

[0005] The existing preparation methods and equipment for optical fiber preforms can no longer meet the requirements for the preparation of special optical fibers. At the same time, precise control of the preparation process and improvement of preparation efficiency have also posed higher challenges for the preparation of optical fiber preforms at this stage.

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