Method for making bow-shaped polarization maintaining optical fiber for Y waveguide

A technology for polarization-maintaining optical fiber and manufacturing method, which is applied in the direction of manufacturing tools, glass manufacturing equipment, glass fiber products, etc. It can solve the problems of easy cracking and large thermal expansion coefficient in the stress area, etc., and achieve good mechanical strength and good optical fiber structure symmetry , The effect of stable polarization performance

Inactive Publication Date: 2013-04-10
BEIJING INDAL TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used polarization maintaining optical fiber is divided into panda type, bow tie type and elliptical type according to the different stress regions, but no matter it is panda type, bow tie type or elliptical type polarization maintaining fiber, because the stress region is doped with a large amount of boron oxide , resulting in a large thermal expansion coefficient in the stress zone, which is very easy to burst during grinding and polishing

Method used

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  • Method for making bow-shaped polarization maintaining optical fiber for Y waveguide
  • Method for making bow-shaped polarization maintaining optical fiber for Y waveguide

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) if figure 2 The pretreatment of the liner on the MCVD lathe is shown;

[0032] (2) Using the MCVD process to deposit the outer skin layer, deposit the stress layer, etch the stress layer, deposit the inner skin layer, deposit the core layer, forward collapse, reverse collapse, polishing and other processes to prepare the bow-tie type polarization maintaining optical fiber preform, optical fiber The outer diameter of the preform is 11.2mm, and the ratio of germanium and boron is 6:1. The total amount of germanium and boron will be 50% of the traditional polarization-maintaining optical fiber material;

[0033] (3) Then draw the polarization-maintaining optical fiber preform into a polarization-maintaining optical fiber with a diameter of 80.5 μm on a wire drawing tower. Two layers of light-cured coatings are used to protect the optical fiber. Finally, a polarization-maintaining optical fiber with a fiber-coated diameter of 173 μm is obtained, and the refraction in ...

Embodiment 2

[0035] (1) if figure 2 The pretreatment of the liner on the MCVD lathe is shown;

[0036] (2) Using the MCVD process to deposit the outer skin layer, deposit the stress layer, etch the stress layer, deposit the inner skin layer, deposit the core layer, forward collapse, reverse collapse, polishing and other processes to prepare the bow-tie type polarization maintaining optical fiber preform, optical fiber The outer diameter of the preform is 19.8mm, the ratio of germanium and boron is 5:1, and the total amount of germanium and boron will be 50% of the traditional polarization-maintaining optical fiber material;

[0037] (3) Then the polarization-maintaining optical fiber preform is drawn into a polarization-maintaining optical fiber with a diameter of 80.5 μm on a drawing tower. The drawing temperature is 2000°C, the drawing tension is 44g, and the drawing speed of the optical fiber is 84m / min. Two layers of light-cured coatings are used to protect the optical fiber, and fin...

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Abstract

The invention belongs to a method for making a polarization maintaining optical fiber and particularly relates to a method for making a bow-shaped polarization maintaining optical fiber for a Y waveguide. A polarization maintaining optical fiber is made through adopting a modified chemical vapor deposition (MCVD) method and then drawn into the polarization maintaining optical fiber by a drawing tower. The method provided by the invention sequentially comprises the following steps of: 1, connecting a liner tube, a guide tube and a tail tube; 2, depositing an outer skin layer; 3, depositing a stress layer; 4, etching the stress layer; 5, depositing an inner skin layer; 6, depositing a core layer; and 7 enabling the perform to shrink. The method has the advantages of one-step molding and simple technology. Besides, all processes are carried out in an airtight environment and are free from external interference, and the optical fiber has excellent strength. Through the adjusting optimization of the ratio of deposited materials in a stress zone, the bow-shaped polarization maintaining optical fiber for the Y waveguide is obtained, and the requirement of a technology for making the Y waveguide is met.

Description

technical field [0001] The invention relates to a manufacturing method of a tie-type polarization-maintaining optical fiber for a Y-waveguide. The bow-tie-type polarization-maintaining optical fiber for a Y-waveguide can be obtained by applying the manufacturing method, and has the advantages of simple manufacturing process, high fiber strength and stable polarization performance. The invention can be used to manufacture polarization maintaining optical fibers working at various wavelengths. Background technique [0002] Polarization-maintaining fiber has a strong polarization-maintaining ability for linearly polarized light, and is mainly used in polarized light interferometric angle rotation measurement. Its typical applications are in the manufacture of fiber optic gyroscopes, fiber optic hydrophones, and coherent optical communication systems. The bow-tie polarization-maintaining fiber for Y waveguide also belongs to the category of polarization-maintaining fiber, and is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/018
CPCC03B2203/30C03B37/01807
Inventor 隋宁菠杭利军魏国盛臧晓微
Owner BEIJING INDAL TECH RES INST
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