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Blowtorch and mandrel manufacturing method

A blowtorch and mandrel technology, applied in the direction of manufacturing tools, glass manufacturing equipment, glass deposition furnace, etc., can solve the problems affecting the transmission speed and quality, the deviation of optical parameters exceeds the standard, and affect the optical performance of single-mode optical fiber, etc., so as to improve the deposition rate , Improve the effect of refractive index distribution

Active Publication Date: 2021-08-03
ZHONGTIAN TECH ADVANCED MATERIALS CO LTD +1
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AI Technical Summary

Problems solved by technology

[0010] The core refractive index profile deposited by this blowtorch has a certain slope at its boundary, which will affect the optical performance of the single-mode fiber, especially the dispersion wavelength, which affects its transmission speed and quality, and is easy to form during the drawing process. The deviation of optical parameters exceeds the standard

Method used

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  • Blowtorch and mandrel manufacturing method
  • Blowtorch and mandrel manufacturing method
  • Blowtorch and mandrel manufacturing method

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Embodiment Construction

[0044] Before describing the present invention, it should be noted that the present invention is not limited to the specific embodiments described below. Those skilled in the art can understand that without departing from the spirit of the claims of the present invention, changes and modifications can be made to the specific embodiments described below.

[0045] figure 1 and figure 2 It is a schematic diagram and a cross-sectional view of a traditional four-layer blowtorch in the VAD mandrel deposition process, respectively. exist figure 1 and figure 2 Among them, a conventional four-layer blowtorch is formed by a central tube 14 and three outer tubes 15, 16, 17 surrounding the central tube, which are arranged sequentially from the inside to the outside. The central tube 14 and the three outer tubes 15, 16, 17 are all provided with feeding ports, namely including the first feeding port 10, the second feeding port 11, the third feeding port 12 and the fourth feeding port ...

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Abstract

The invention provides a blowtorch, the blowtorch comprises an inner tube and an outer tube sleeved on the inner tube, the outer tube has an outer nozzle, the inner tube has an inner nozzle, and the inner nozzle is at the The axial direction of the torch is lower than the outer nozzle, and the outer nozzle and the inner nozzle are used to inject raw gas for combustion reaction. The present invention also provides a method for manufacturing core rods by using the blowtorch vapor deposition, which can effectively improve the problem of low slopes on both sides of the optical fiber core rod refractive index distribution, thereby improving the transmission quality of the optical fiber, reducing the rate of optical fiber optical parameters exceeding the standard, and having a relatively high high deposition rate.

Description

technical field [0001] The invention relates to the field of manufacturing optical fiber prefabricated rods, in particular to a blowtorch suitable for manufacturing single-mode optical fiber prefabricated rod core rods by VAD method and a method for depositing single-mode optical fiber prefabricated rod core rods by using the blowtorch. Background technique [0002] With the development of optical fiber preform technology, the more mature preform core rod preparation methods mainly include axial vapor deposition (VAD), modified chemical vapor deposition (MCVD), and plasma chemical vapor deposition (MCVD). . [0003] The equipment for manufacturing core rods by VAD method is mainly composed of five parts: reaction chamber, blowtorch, raw gas supply part, powder rod rotating and lifting part and PC. Among them, the blowtorch is one of the most critical components, and its function is to spray out SiCl 4 / GeCl 4 / H 2 / O 2 Mixed gas such as combustion and hydrolysis reactio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/014
CPCC03B37/0142C03B2207/06C03B2207/12C03B2207/20
Inventor 秦钰沈一春钱宜刚
Owner ZHONGTIAN TECH ADVANCED MATERIALS CO LTD
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