Manufacturing method of twisted optical fiber

Abstract

The invention discloses a manufacturing method of a twisted optical fiber, which comprises the following steps of: 1) performing heating and first wiredrawing on an optical fiber perform to form a primary optical fiber of which the diameter is greater than that of the twisted optical fiber, wherein the optical fiber perform is in a non-rotation state in the first wiredrawing process; and 2) rotating the primary optical fiber, and performing heating and second wiredrawing on the primary optical fiber to form a twisted optical fiber; or keeping the primary optical fiber not rotating, performing heating and second wiredrawing on the primary optical fiber to form a secondary optical fiber, and rotating the secondary optical fiber to form a twisted optical fiber. The method disclosed by the invention greatly reduces the production difficulty, can guarantee the wiredrawing quality and the optical performance of the twisted optical fiber, and saves the cost.

Description

technical field [0001] The invention relates to twisted optical fibers, in particular to a manufacturing method of twisted optical fibers. Background technique [0002] Since the birth of optical fiber in Corning Corporation of the United States in the mid-1970s, it has been rapidly developed and applied in many fields, especially in the field of communication. Optical fiber has entered thousands of households in all countries in the world. Significant applications, of which fiber optic gyroscope is a good example. We know that the standard optical fiber diameter is generally around 125um. Depending on the application, sometimes it needs to be thinner, sometimes it needs to be thicker, generally ranging from 40um to 1000um (1mm). These optical fibers are usually drawn from a pre-prepared preform rod (also known as a master rod), and the size (thickness and length) of the preform rod will vary according to different preparation methods. The smallest diameter of the preform ...

AI Technical Summary

Problems solved by technology

Although reducing the wire drawing speed can reduce the rotation speed of the preform, but the wire drawing speed is too slow, and the quality of the wire drawing cannot be controlled, especially the thickness of the wire diameter is difficult to control. Some special optical performance requirements cannot be met, and practical torsion cannot be obtained. optical fiber

In fact, foreign research on the above-mentioned twisted optical fiber production process began in the mid-1980s, but has not achieved good results. Some domestic universities and research institutes also began research in the early 1990s, and so far still not successful

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