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Method for preparing rare earth doped silica glass microstructure optical fiber by laser melting technology

A microstructure optical fiber, rare earth doping technology, applied in glass manufacturing equipment, manufacturing tools and other directions, to achieve the effect of improving stability, reducing hydroxyl content, and good flexibility

Active Publication Date: 2017-11-14
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 silica glass microstructure optical fiber by laser melting technology
  • Method for preparing rare earth doped silica glass microstructure optical fiber by laser melting technology
  • Method for preparing rare earth doped silica glass microstructure optical fiber 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 a rare earth-doped quartz glass microstructure optical fiber by adopting laser melting technology. In the method, the steps include: powder making, smelting, treatment of doped rods, preparation of optical fiber prefabricated rods, and drawing of rare earth-doped quartz glass microstructure optical fibers. Also disclosed is the application of uniformly doped quartz glass rods in all solid-state lasers and microstructured optical fibers. Also disclosed is a laser smelting system, which includes a powder feeder, a laser light source, a mother bar, a fixture, a motor, and a guide rail. The rare earth doped powder and quartz glass microstructure optical fiber prepared by the invention can realize uniform doping of various rare earth ions, and the doped microstructure optical fiber prepared by the invention has an effective doping concentration of rare earth ions exceeding 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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Patent Type & Authority Patents(China)
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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