Method for manufacturing panda polarization-maintaining optical fiber preform

Abstract

The invention provides a method for manufacturing a panda polarization-maintaining optical fiber preform. The method comprises the following steps: manufacturing an optical fiber core rod; manufacturing polarization-maintaining stress rods; symmetrically and fixedly arranging two polarization-maintaining stress rods at both sides of the core rod according to needs of the stress distribution; carrying out over-cladding deposition on the core rod and the polarization-maintaining stress rods by virtue of an outside deposition method to obtain a preform soot; and sintering the preform soot to obtain the polarization-maintaining optical fiber preform of which the cross section is circular. According to the method for manufacturing the panda polarization-maintaining optical fiber preform, the fiber core and the stress rods are subjected to over-cladding deposition by virtue of the outside deposition method so as to obtain the polarization-maintaining optical fiber preform, and thus the preform cracking defects and mechanical error caused by processing the optical fiber preform through a mechanical drilling method are eliminated and the accuracy and efficiency of processing the optical fiber preform are increased.

Description

technical field [0001] The invention belongs to the field of optical fiber manufacturing, and in particular relates to a method for manufacturing a Panda polarization-maintaining optical fiber preform. Background technique [0002] The optical fiber manufactured by using the birefringence phenomenon of the optical fiber is called the polarization maintaining optical fiber, which has the function of maintaining the linear polarization direction of the transmitted light and can be used in various fields. In the stress birefringence polarization maintaining fiber, Panda type polarization maintaining fiber is the most widely used. Its structure includes core, stress region and cladding part, wherein the core is located in the central part of the cladding, and two cylindrical stress regions distributed on both sides of the core. [0003] At present, the widely used method of making Panda polarization maintaining optical fiber preform is the method of punching and inserting rods....

AI Technical Summary

Problems solved by technology

However, due to the mechanical vibration of the drill bit during mechanical processing, the glass structure is destroyed, there is a danger of punching and exploding rods, and there are mechanical errors such as axis offset and uneven ends of the preform, so the processing accuracy is low. The processing efficiency of the processing method is also low

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