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Homogenization preparation method of rare earth doped quartz glass rod

A quartz glass rod and rare earth doping technology, applied in the field of optical fiber preform and laser glass, can solve the problems of high fiber loss, high content, poor optical uniformity of rare earth doped quartz glass, etc., to reduce the content and improve the optical uniformity , the effect of beneficial to the luminous performance

Active Publication Date: 2019-06-21
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: due to the limitation of doping uniformity and stress control in the doping process, it is difficult to realize the preparation of large core diameter rare earth doped quartz core rods
This invention patent focuses on the preparation method of large-sized ytterbium-doped core rod glass. The disadvantage is that the content of divalent ytterbium ions and low-valent impurity ions in the glass is still high, resulting in a high final optical fiber loss. Level
On the other hand, the optical uniformity of rare earth-doped quartz glass is still poor, which cannot meet the application requirements of laser glass media

Method used

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  • Homogenization preparation method of rare earth doped quartz glass rod
  • Homogenization preparation method of rare earth doped quartz glass rod
  • Homogenization preparation method of rare earth doped quartz glass rod

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Embodiment 1

[0022] In this embodiment, the ytterbium-doped quartz glass rod fired by the powder sintering process is used for high-temperature micro-zone heating to homogenize and prepare a high-quality rare earth-doped quartz glass rod. The method includes the following steps:

[0023] ①Process the rare earth-doped quartz glass prepared based on the powder sintering process into a glass rod with a diameter of 10mm and a length of 50mm, place it on a glass lamp lathe, and use a hydrogen-oxygen flame for micro-area heating. Adjust the flame so that the length of the high-temperature heating zone is less than 1cm. According to the chemical reaction ratio, hydrogen and oxygen react to form water according to the ratio of 2 to 1. In order to obtain an oxygen-rich atmosphere, it is necessary to increase the oxygen flow rate, so that the flow ratio of oxygen and hydrogen gas is increased from the conventional 0.5 to 1, and the heating temperature is 2000 °C , using lathe rotation to carry out s...

Embodiment 2

[0029] In this embodiment, the ytterbium-doped quartz glass rod fired by the powder sintering process is used for high-temperature micro-zone heating to homogenize and prepare a high-quality rare earth-doped quartz glass rod. The method includes the following steps:

[0030] ①Process the rare earth-doped quartz glass prepared based on the powder sintering process into a glass rod with a diameter of 6mm and a length of 200mm, place it on a glass lamp lathe, and use a hydrogen-oxygen flame for micro-area heating. Adjust the flame so that the length of the heating high-temperature zone is less than 1cm. According to the chemical reaction ratio, hydrogen and oxygen react to form water according to the ratio of 2 to 1. In order to obtain an oxygen-rich atmosphere, it is necessary to increase the flow rate of oxygen, so that the flow ratio of oxygen and hydrogen is increased from the conventional 0.5 to 1, and the heating temperature is 2100°C , using lathe rotation to perform secon...

Embodiment 3

[0035] In this embodiment, high-quality Nd-doped quartz glass rods are prepared by homogenizing Nd-doped quartz glass rods fired by powder sintering technology for high-temperature micro-zone heating. The method includes the following steps:

[0036] ① Process the neodymium-doped quartz glass prepared based on the powder sintering process into a glass rod with a diameter of 6mm and a length of 100mm, place it on a glass lamp lathe, and use a hydrogen-oxygen flame for micro-area heating. Adjust the flame so that the length of the high-temperature heating zone is less than 1cm. According to the chemical reaction ratio, hydrogen and oxygen react to form water according to the ratio of 2 to 1. In order to obtain an oxygen-rich atmosphere, it is necessary to increase the flow rate of oxygen, so that the flow ratio of oxygen and hydrogen is increased from the conventional 0.5 to 1, and the heating temperature is 2000 °C , using lathe rotation to perform secondary high-temperature homo...

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Abstract

The invention discloses a homogenizing preparation method of rare-earth-doped quartz glass rods. According to the method, with a high-temperature micro-area heating technology, by the aid of the rotating shearing stress, secondary melting homogenization treatment is performed on glass rods in an oxygen-enriched atmosphere, and the homogeneity of mandrel glass is improved. According to the method, the content of low-valence impurity ions is reduced by the aid of the oxygen-enriched atmosphere, and the loss of the glass can be reduced.

Description

technical field [0001] The invention relates to an optical fiber prefabricated rod and laser glass, in particular to a preparation method of a large-mode field-doped rare earth-doped rare earth quartz optical fiber prefabricated rod core rod and a homogenized preparation method of quartz-based laser glass. Background technique [0002] In order to meet the higher laser power requirements of industrial processing applications, while reducing the laser power per unit area of ​​rare earth-doped silica fibers, reducing nonlinear effects and laser damage, high-power laser fibers are developing in the direction of large-mode-field fibers. . Since 2004, the University of Southampton (Optics Express, 2004, Vol.12, No.25, pp.6088-6092) and the German Jena Photonic Technology Institute have joined forces with Heraeus (SPIE Conference Proceedings, Volume 6873 in 2008) , pp.687311-1-9) carried out the development of large mode field Yb-doped special optical fiber. [0003] The more ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B29/00C03B25/00
CPCC03B25/00C03B29/00
Inventor 于春雷王世凯王孟冯素雅胡丽丽温磊
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI