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Method for producing polarization maintaining optical fibre

A technology of polarization-maintaining optical fiber and manufacturing method, which is applied in the directions of manufacturing tools, glass manufacturing equipment, glass fiber products, etc., can solve the problems of destroying the performance of polarization-maintaining optical fiber, reducing the performance of polarization-maintaining optical fiber, and positioning consistency, and achieving geometric shape And the effect of good precision control, small processing stress and good product processing quality

Active Publication Date: 2004-12-29
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the hole drilling process, since two separate circular holes need to be punched, the workpiece must be moved or rotated. This movement will cause positioning consistency problems, reduce the symmetry of the holes, and finally reduce the performance of the polarization maintaining fiber
Third, poor adaptability
Fourth, subsequent processing is difficult
Since the combined rod of the punching process includes three independent preforms, and the outer diameter of the combined rod is relatively large, the tapering of this preform (the optical fiber needs to be drawn into a conical shape at the end of the preform before drawing, so that it can be drawn) ), it is very difficult to connect the extension rod, and it is easy to contain defects such as air bubbles and gas lines during the drawing process, which will damage the performance of the polarization maintaining fiber

Method used

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  • Method for producing polarization maintaining optical fibre
  • Method for producing polarization maintaining optical fibre
  • Method for producing polarization maintaining optical fibre

Examples

Experimental program
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Effect test

Embodiment 1

[0032] PCVD method is used to deposit the core rod 6 and the stress rod 5, wherein the core rod 6 includes a high refractive index core part 10 and a cladding part 9, such as Figure 7 As shown, the core 10 is germanium-doped silica, which has a relatively high optical refractive index, and the cladding 9 is pure silica glass. The structure of the stress rod 5 includes a stress zone 8 and a cladding 7, such as Image 6 As shown, the stress region 8 is boron-doped quartz glass, which has a low optical refractive index and a large thermal expansion coefficient, and the cladding layer 7 is pure quartz glass. Machined pure quartz glass sleeve 4 (see figure 2 ). The casing 4 is a pure quartz glass cylinder with a circular inner hole, and the inner hole wall is obtained by grinding the inner hole wall, and then the inner hole wall is polished. Mandrel 6 and stress rod 5 are processed into suitable shape by machining simultaneously (see Image 6, 7), that is, a mandrel rod with a...

Embodiment 2

[0034] PCVD method is used to deposit the core rod 6 and the stress rod 5, wherein the core rod 6 includes a high refractive index core part 10 and a cladding part 9, the core 10 is germanium-doped quartz, which has a higher optical refractive index, and the cladding 9 For pure quartz glass. The structure of the stress rod 5 includes a stress zone 8 and a cladding 7, wherein the stress zone 8 is boron-doped quartz glass with a low optical refractive index and a large thermal expansion coefficient, and the cladding 7 is pure quartz glass. Machining casing 4. The casing 4 is a pure quartz glass cylinder with a circular inner hole. By grinding the inner hole wall, the cross-section of the inner hole with three circles connected side by side is obtained (see Figure 5 ). Polish the bore wall. Simultaneously corrode the mandrel and stress rods to the appropriate outer diameter. The mandrel and stress rods are then inserted into the formed casing, the stress rods being located ...

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Abstract

The making process of circular polarization maintaining fiber includes deposition process to make core rod and stress rod with preserved coating, machining mechanically the matched sides of the core rod and the stress rod to reach the matching interval requirement, machining mechanically the inner hole of quartz casing for fitting the combined cross section of the core rod and the stress rod, setting the machined core rod and stress rod into the quartz casing for matching tightly to constitute prefabricated rod for circular polarization maintaining fiber, drawing, cleaning, and re-drawing to form fiber. The making process has high precision, high product quality and powerful adaptability, and is suitable for mass producing circular polarization maintaining fiber product.

Description

technical field [0001] The invention relates to a method for manufacturing a polarization-maintaining optical fiber. In particular, it relates to a method for manufacturing panda-type polarization-maintaining optical fiber. The polarization-maintaining optical fiber and single-mode single-polarization optical fiber working at various wavelengths can be manufactured by applying the manufacturing method. Background technique [0002] Polarization maintaining fiber is a kind of special fiber. Polarization maintaining fiber, that is, polarization maintaining fiber, is a type of fiber that maintains the linear polarization direction of the transmitted light. Polarization-maintaining optical fiber can be applied in many fields, such as multiplexing coherent communication, fiber optic gyroscope, fiber optic hydrophone, polarization sensing, etc. Polarization maintaining fiber is a special fiber type with wide application value. [0003] In ordinary communication optical fiber, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/014C03B37/018C03B37/025C03B37/027
CPCC03B37/01231C03B37/01217C03B2203/31Y02P40/57
Inventor 汪洪海涂峰程铭童维军
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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