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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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  • Summary
  • Abstract
  • Description
  • Claims
  • 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., which are very important for the currently used technologies, such as: modified vapor deposition (MCVD), external vapor deposition (OVD), vapor axial deposition (VAD) and plasma chemistry Vapor phase deposition process (PCVD), sol-gel method (SOL-GEL), etc. will be difficult to realize, thus limiting the further development of MSF with high doping concentration

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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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preparation example Construction

[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 10-30 cm, and after grinding and polishing, uniform doped silica rods with an outer diameter of 5-30 mm can be made. Miscellaneous quartz rod; as the core of the microstructured optical fiber preform, the method for preparing the microstructured optical fiber preform by stacking: selecting 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 casing, Quartz capillaries are periodically arranged around the center of the doped quartz rods in the inner holes, so as to prepare preformed rods of doped microstructure optical fibers;

[0045] 4) Drawing of rare earth-doped silica glass microstructure optical fiber: install the microstructure optical fiber preform prepared in the previous step on the fiber drawing tower, and finally draw out the outer diameter of 100- 2000 μm rare e...

Embodiment 1

[0055] The composition of the doping powder is (mass percentage): Yb 2 o 3 : 1.28%, Al 2 o 3 : 2.49%, SiO 2 : 96.23%; the amount of raw materials used to prepare the doped powder is determined by the composition; select some of the following precursors to prepare ytterbium-doped quartz glass: ytterbium chloride hexahydrate, aluminum chloride hexahydrate, silicon tetrachloride (solution). Choose deionized water as the solvent. Add deionized water into a quartz glass beaker, dissolve aluminum chloride hexahydrate and ytterbium chloride hexahydrate in the deionized water, and stir for 30 minutes to prepare a doping solution. Then use dry oxygen as the carrier gas (carrier gas flow rate: 0.1-4.8 m 3 / h) Carry silicon tetrachloride (the amount of silicon tetrachloride introduced is 1-4 times the mass of the doping solution) into the doping solution, and keep stirring to form a gel-like material. The material was then heated at a temperature of 200 degrees to remove excess wat...

Embodiment 2

[0065] The composition of the doping powder is (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 used to prepare the doping powder is determined by the composition; add deionized water to a quartz glass beaker, 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 (carrier gas flow rate: 0.1-4.8 m 3 / h) Carry silicon tetrachloride (the amount of silicon tetrachloride introduced is 1-4 times the mass of the doping solution) into the doping solution, and keep stirring to form a gel-like material. The material was then heated at 200 degrees to remove excess moisture, and after 6 hours, a dry doped powder was obtained. Then the dry powder was heated under a chlorine atmosphere at a high temperatur...

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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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