Method for preparing rare earth-doped quartz glass microstructure optical fibers by laser melting technology

A technology of micro-structure optical fiber and laser melting, applied in glass manufacturing equipment, manufacturing tools, etc., to achieve good flexibility, increase power, and reduce the effect of hydroxyl content

Active Publication Date: 2015-05-06
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Application Information

AI Technical Summary

Problems solved by technology

With the emergence of optical fiber designs such as large mode fields, new requirements are put forward for the process of preparing optical fiber preforms, such as larger core rods, higher doping concentrations, uniform distribution of doping ions, and refraction of doping materials. The precise control of the rate, the co-doping of multiple rare earth ions, etc

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  • Method for preparing rare earth-doped quartz glass microstructure optical fibers by laser melting technology
  • Method for preparing rare earth-doped quartz glass microstructure optical fibers by laser melting technology
  • Method for preparing rare earth-doped quartz glass microstructure optical fibers by laser melting technology

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Example Embodiment

[0044] 3) Treatment of doped rods and preparation of optical fiber preforms: The prepared doped quartz rods are cut into rods with a length of 10-30cm, and after grinding and polishing, a uniform doped with an outer diameter of 5-30mm can be made. Miscellaneous quartz rod; as the core of the microstructure optical fiber preform, the method of preparing the microstructure optical fiber preform by stacking: select a quartz tube with an outer diameter of 15-50mm, an inner diameter of 10-35mm, and a length of 20-100cm as the outer tube, Silica capillaries are periodically arranged around the inner holes with the doped silica rod as the center, so as to prepare a preform doped with microstructure optical fiber;

[0045] 4) Drawing of rare-earth-doped silica glass microstructure fiber: install the microstructure fiber preform prepared in the previous step on the fiber drawing tower, and at a temperature of 1800-2000℃, the final diameter is 100- 2000μm rare earth-doped silica glass micr...

Example Embodiment

[0054] Example 1:

[0055] The composition of the doped powder (mass percentage): Yb 2 O 3 : 1.28%, Al 2 O 3 : 2.49%, SiO 2 :96.23%; The amount of raw materials for preparing the doped powder is determined by the composition; select the following precursors to prepare ytterbium-doped quartz glass: ytterbium chloride hexahydrate, aluminum chloride hexahydrate, silicon tetrachloride (solution). Select deionized water as the solvent. Add deionized water into a quartz glass beaker, dissolve aluminum chloride hexahydrate and ytterbium chloride hexahydrate in deionized water, and stir for 30 minutes to prepare a doping solution. Then use dry oxygen as the carrier gas (air volume of carrier gas: 0.1-4.8 m 3 / h) Carry silicon tetrachloride (the input amount of silicon tetrachloride is 1-4 times the mass of the doping solution) into the doping solution and stir constantly to form a gel-like material. The material is then heated at 200 degrees to remove excess water, and after 6 hours, i...

Example Embodiment

[0064] Example 2:

[0065] The composition of the doped powder (mass percentage): Yb 2 O 3 : 2.53%, Er 2 O 3 : 0.61%, Al 2 O 3 : 2.46%, SiO 2 :94.40%; The amount of raw materials for preparing doped powder is determined by the composition; add deionized water in a quartz glass beaker, and dissolve aluminum chloride hexahydrate, erbium chloride, and ytterbium chloride hexahydrate in deionized water to form erbium ytterbium The solution was co-blended, and the solution was stirred at room temperature for 30 minutes. Then use dry oxygen as the carrier gas (air volume of carrier gas: 0.1-4.8 m 3 / h) Carry silicon tetrachloride (the input amount of silicon tetrachloride is 1-4 times the mass of the doping solution) into the doping solution and stir constantly to form a gel-like material. Then the material was heated at a temperature of 200 degrees to remove excess water, and after 6 hours, a dry doped powder was obtained. Then, the dry powder is heated in a chlorine atmosphere at a ...

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Abstract

The invention discloses a method for preparing rare earth-doped quartz glass microstructure optical fibers by a laser melting technology. The method comprises the following steps of powder preparation, melting, doped rod treatment and optical fiber precast rod preparation, and rare earth-doped quartz glass microstructure optical fiber drawing. The invention discloses a use of the uniformly doped quartz glass rod in an all solid state laser and a microstructure optical fiber. The invention discloses a laser melting system. The laser melting system comprises a powder feeding device, a laser source, a mother rod, a clamp, a motor and a guide rail. The prepared rare earth-doped powder and the quartz glass microstructure optical fibers realize uniform doping of a plurality of rare earth ions. The prepared doped microstructure optical fibers have a rare earth ion effective-doping concentration more than 10000ppm.

Description

technical field [0001] The invention relates to a method for preparing a rare earth-doped quartz glass microstructure optical fiber by adopting laser melting technology. Background technique [0002] Compared with traditional solid-state lasers, fiber lasers have many advantages such as high efficiency, compactness, tunability, excellent beam quality, good heat dissipation, high gain, and low laser threshold, so they are widely used in industrial processing, material processing, military defense and other fields . However, with the development and application of industrial processing such as laser cutting and welding and high-energy laser weapons, higher requirements are put forward for the higher power output of fiber lasers and the quality of laser beams, but high-power fiber lasers also bring fiber materials. For new problems such as laser damage and nonlinear effects, using a fiber with a large core diameter can effectively improve the problem of laser damage, and short...

Claims

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Application Information

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IPC IPC(8): C03B37/02C03B37/018
Inventor 张卫周桂耀夏长明侯峙云刘建涛
Owner SOUTH CHINA NORMAL UNIVERSITY
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