A quartz sleeve for large-size optical fiber preform and its manufacturing method

An optical fiber preform and quartz sleeve technology, which can be used in manufacturing tools, glass manufacturing equipment, etc., can solve problems such as inability to meet, and achieve the effects of low manufacturing cost, high qualification rate, and high utilization rate of raw materials

Active Publication Date: 2017-02-08
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing pure silica sleeve with a fixed refractive index cannot meet the requirements of optical fibers with multiple optical cladding structures in their refractive index profiles.

Method used

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  • A quartz sleeve for large-size optical fiber preform and its manufacturing method
  • A quartz sleeve for large-size optical fiber preform and its manufacturing method
  • A quartz sleeve for large-size optical fiber preform and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] combine image 3 , 4 and figure 2 The process flow chart shown describes the preparation of a low-refractive-index fluorine-doped liner and an embodiment of using it to manufacture a bend-insensitive single-mode optical fiber.

[0047] Take a pure quartz liner with an outer diameter of 45mm, a wall thickness of 5mm, and a length of 1.7m, and extend both ends to match the fixtures at both ends of the PCVD deposition equipment. After corrosion and cleaning, carry out PCVD processing;

[0048] The processed liner is corroded and cleaned by soaking in AR grade hydrofluoric acid reagent to remove the internal and external surface contamination caused by the liner extension process. The inner and outer surfaces of the liner are washed with pure deionized water, and then the inner and outer surfaces are purged with pure nitrogen to fully dry;

[0049] The pure quartz liner is placed in a microwave resonant cavity holding furnace. The temperature in the holding furnace is k...

Embodiment 2

[0057] combine Figure 5 , 6 and image 3 The process flow chart shown describes the preparation of a low-refractive-index fluorine-doped sleeve and an embodiment of using it to manufacture a large effective area single-mode optical fiber with better bending properties.

[0058] Take a pure quartz liner with an outer diameter of 60mm, a wall thickness of 5.5mm, and a length of 1.7m, and extend both ends to match the fixtures at both ends of the PCVD deposition equipment; after etching and cleaning, perform PCVD processing;

[0059] The processed liner is corroded and cleaned by soaking in AR grade hydrofluoric acid reagent to remove the internal and external surface contamination caused by the liner extension process. The inner and outer surfaces of the liner are washed with pure deionized water, and then the inner and outer surfaces are purged with pure nitrogen to fully dry;

[0060] The pure quartz liner is placed in a microwave resonant cavity holding furnace. The tempe...

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Abstract

The invention relates to a quartz sleeve for a large-size optical fiber perform, and a manufacturing method thereof. The quartz sleeve comprises a tubular purely-quartz liner tube, and is characterized in that for the purely-quartz liner tube, the outer diameter is 34-63mm, the wall thickness is greater than or equal to 2mm, and the length is 1.0-2.0m; a quartz-doped layer is deposited on the tube wall of the inner cavity of the purely-quartz liner tube, the relative refractivity difference of the quartz-doped layer is -1.5% to -0.3%, and the inner diameter of the deposited quartz sleeve is equal to or greater than 24mm. Based on the PCVD (Plasma Chemistry Vapor Deposition) technology, the quartz sleeve has the advantages of high raw material utilization rate and accurate refractivity value control; the manufactured sleeve is not only uniform in distribution of refractivity parameters, but also stable in technology and high in the rate of finished products; the large-size optical fiber perform can be manufactured by fully applying the sleeve technology, and the function of manufacturing multi-optical cladding refractivity sections can be realized, and therefore, the quartz sleeve has the advantages of simple and convenient technology and low manufacturing cost when being used for manufacturing the complicated large-size optical fiber perform.

Description

technical field [0001] The invention relates to a quartz sleeve which can be used as the outer covering material of a large-scale optical fiber prefabricated rod core rod and a manufacturing method thereof, which has the advantages of adjustable refractive index value, uniform distribution of refractive index value parameters, and the like. Background technique [0002] In the field of optical fiber manufacturing, the so-called ferrule is a hollow tubular material made of quartz. Functionally, it can be used as a substrate for depositing doped silica or pure silica, and has the effect of increasing the size of the optical fiber preform. Therefore, the sleeve can be understood as a preform of artificial quartz with specific geometric dimensions. Currently known manufacturing processes for optical fiber preforms typically include in-pipe vapor deposition processes, such as modified chemical vapor deposition (MCVD, modified chemical vapor deposition) and plasma chemical vapor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/018
Inventor 王润涵龙胜亚罗杰艾靓周红燕
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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