Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical fiber perform preparation and optical fiber wiredrawing method

A technology of optical fiber preform and optical fiber, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of high process cost, maintenance cost and environmental protection treatment cost, strict requirements for equipment, process and environmental protection, and high complexity of preform mainstream technology , to achieve the effects of reducing overall production costs, excellent product performance, and obvious cost advantages

Active Publication Date: 2015-07-22
久智光电子材料科技有限公司 +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OVD and VAD technologies need to use SiCl on the periphery of the mandrel 4 Chemical vapor deposition as the main raw material to form SOOT body, and then in Cl 2 dehydration under the same conditions and generate a large amount of HCl harmful gas at the same time, and then complete sintering and vitrification under the protection of helium. Each of the above steps needs to be carried out in a separate process device. The equipment, process and environmental protection requirements are very strict, and the process cost, maintenance cost and environmental protection treatment cost are extremely high
[0003] There have been many reports on the methods of drawing optical fibers from preforms. Although the process details are different, it is generally necessary to disassemble and cool the prepared preforms, transfer them to the optical fiber drawing tower device for reassembly and fixation, and reheat them. In order to complete the processes of melting and wire drawing, the process is complex and the control of process parameters is difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber perform preparation and optical fiber wiredrawing method
  • Optical fiber perform preparation and optical fiber wiredrawing method
  • Optical fiber perform preparation and optical fiber wiredrawing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] Example 1: Electric heating furnace is used as the heat source, and the quartz tube is equipped with core SiO 2 Is a glass rod (cross-sectional structure such as figure 2 , 1a 1 —Multimode core layer, n 1 —The refractive index of the multimode core layer, 1b 1 —Multimode optical cladding, n 2 —The refractive index of the multi-mode optical cladding), length 1000mm, diameter 50mm, welded rods are assembled and fixed vertically into the quartz tube and kept coaxial, the height of the quartz tube is 1200mm, diameter 120mm, wall thickness 5mm, mounted on the top Good high temperature resistant sealing device with quartz sand discharge port and vacuum port, close the quartz sand discharge port and vacuum to 4mbar.

[0041] Start the quartz sand automatic feeding system, fill the quartz sand material with a purity of 99.999% or more from 100 mesh to 300 mesh into the aforementioned quartz tube container at a predetermined height of 200 mm, and start heating and melting. The melti...

example 2

[0044] Example 2: Using the heating furnace device as the heat source, the quartz tube container is equipped with SiO for core 2 Is a glass rod (cross-sectional structure such as image 3 , 1a 2 —Single-mode core layer, n 1 —The refractive index of the single-mode core layer, 1b 2 —Single-mode optical cladding, n 2 —The refractive index of the single-mode optical cladding), length 1500mm, diameter 40mm, welded rods are assembled and fixed vertically into the quartz tube and kept coaxial. The height of the quartz tube is 1700mm, the diameter is 210mm, and the wall thickness is 5mm. Mounted on the top Good high temperature resistant sealing device with quartz sand discharge port and vacuum port, close the quartz sand discharge port, and vacuum to 9mbar.

[0045] Start the quartz sand automatic feeding system, fill the quartz sand material with a purity of 99.999% or more from 100 mesh to 300 mesh into the aforementioned quartz tube container at a predetermined height of 400 mm, and s...

example 3

[0048] Example 3: Using a heating furnace device as a heat source, SiO for core is arranged in a quartz tube container 2 Glass rod (section structure such as Figure 4 , 1a 3 —Pure SiO 2 Core layer, n 1 —Pure SiO 2 Refractive index of core layer, 1b 3 —F-doped SiO 2 Optical cladding, n 2 —F-doped SiO 2 The refractive index of the optical cladding), length 1500mm, diameter 10mm, welded rods are assembled and fixed vertically into the quartz tube and kept coaxial. The height of the quartz tube is 700mm, the diameter is 170mm, and the wall thickness is 5mm. The high temperature resistant vacuum plug of the quartz sand feeding port and the vacuum port, close the quartz sand feeding port, and vacuum to 7mbar.

[0049] Start the quartz sand automatic feeding system, fill the 100-300 mesh F-doped quartz sand mixture into the aforementioned quartz tube container at a predetermined height of 300 mm, and start heating and melting. The melting temperature is 2500 on the outer surface of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to an optical fiber perform preparation and optical fiber wiredrawing method. According to the method, a heating furnace device is adopted as a heat source, a bar is arranged in a quartz crucible container, wherein the including core of the bar is made from SiO2 glass; the container is filled with glass sand or a silica sand mixture doped with F, B or other elements at high temperature, optical fiber perform with SiO2 cladding, or with a silica sand mixture outer cladding layer doped with F, B or other elements, is fused and drawn on the periphery of the bar, and an optical fiber product also can be directly drawn through adjusting the drawing technological parameters.

Description

Technical field [0001] The invention relates to a method for preparing an optical fiber preform and drawing an optical fiber. Background technique [0002] At present, the production of optical fiber preforms mostly adopts a two-step method, that is, the core rod is first manufactured, and then the outer cover is manufactured by different technologies outside the core rod. Outsourcing layer technology mainly includes OVD, VAD and other process methods. OVD and VAD technologies need to be around the core rod, using SiCl 4 As the main raw material for chemical vapor deposition to form SOOT body, and then in Cl 2 Under the conditions of dehydration, a large amount of HCl harmful gas is generated at the same time, and then sintering and vitrification are completed under the protection of helium. Each of the above steps needs to be carried out in a separate process device. Therefore, the mainstream technology of the preform preparation is relatively complex. The equipment, process an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C03B37/012C03B37/025
Inventor 张锦秦卫光谷巨明刘晓光孙丽丽王春玲李文彦张春林
Owner 久智光电子材料科技有限公司