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Hydroxyl removing sintering method for a nanometer porous glass material

A glass material, nanoporous technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of stimulated Raman scattering, fiber damage, fiber beam quality deterioration, etc.

Inactive Publication Date: 2019-11-19
武汉长进光子技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of pursuing high power, high-power laser output will lead to too high power density in the fiber core, which will easily cause serious nonlinearities such as stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS). effect and fiber damage
Studies have found that the use of large mode area (LMA) fibers can reduce the core power density, thereby suppressing nonlinear effects, but this method will excite higher-order modes (HOM), resulting in deterioration of the fiber output beam quality

Method used

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  • Hydroxyl removing sintering method for a nanometer porous glass material
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  • Hydroxyl removing sintering method for a nanometer porous glass material

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Experimental program
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Effect test

Embodiment 1

[0016] The invention provides a method for sintering a nanoporous glass material to remove hydroxyl groups, which comprises the following steps:

[0017] S1, soaking the nanoporous glass material in water;

[0018] S2, putting the soaked nanoporous glass material into a heating furnace and heating;

[0019] S3, feed chlorine, helium and oxygen into the heating furnace while heating, the flow of chlorine is 50Sccm, the flow of helium is 500Sccm, and the flow of oxygen is 100Sccm;

[0020] S4, the temperature is raised to 1500°C in 600 minutes, and the introduction of chlorine, helium and oxygen is gradually stopped during the heating process;

[0021] S5. After cooling, a completely transparent and dense doped quartz glass rod is obtained.

[0022] In the preparation of special optical fibers, the hydroxyl group (-OH) in the fiber core is an extremely important factor affecting the performance of fiber lasers. At present, the most reliable and stable way to remove hydroxyl (...

Embodiment 2

[0026] The invention provides a method for sintering a nanoporous glass material to remove hydroxyl groups, which comprises the following steps:

[0027] S1, soaking the nanoporous glass material in water;

[0028] S2, putting the soaked nanoporous glass material into a heating furnace and heating;

[0029] S3, feed chlorine, helium and oxygen into the heating furnace while heating, the flow of chlorine is 300Sccm, the flow of helium is 800Sccm, and the flow of oxygen is 300Sccm;

[0030] S4, the temperature is raised to 1500°C in 600 minutes, and stop feeding chlorine, helium and oxygen when heated to 1150°C;

[0031] S5. After cooling, a completely transparent and dense doped quartz glass rod is obtained.

[0032] In the preparation of special optical fibers, the hydroxyl group (-OH) in the fiber core is an extremely important factor affecting the performance of fiber lasers. At present, the most reliable and stable way to remove hydroxyl (-OH) is to remove hydroxyl by ch...

Embodiment 3

[0036] The invention provides a method for sintering a nanoporous glass material to remove hydroxyl groups, which comprises the following steps:

[0037] S1, soaking the nanoporous glass material in water;

[0038] S2, putting the soaked nanoporous glass material into a heating furnace and heating;

[0039] S3, feed chlorine, helium and oxygen into the heating furnace while heating, the flow of chlorine is 200Sccm, the flow of helium is 700Sccm, and the flow of oxygen is 200Sccm;

[0040] S4, the temperature is raised to 1500°C in 600 minutes, and when the temperature reaches 950°C, stop feeding chlorine, helium and oxygen;

[0041] S5. After cooling, a completely transparent and dense doped quartz glass rod is obtained.

[0042] In the preparation of special optical fibers, the hydroxyl group (-OH) in the fiber core is an extremely important factor affecting the performance of fiber lasers. At present, the most reliable and stable way to remove hydroxyl (-OH) is to remove ...

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Abstract

The invention discloses a hydroxyl removing sintering method for a nanometer porous glass material. The hydroxyl removing sintering method comprises: S1, soaking a nanometer porous glass material in water; S2, placing the soaked nanometer porous glass material in a heating furnace, and heating; S3, introducing chlorine gas, helium gas and oxygen into the heating furnace while heating; S4, increasing the temperature to 1500 DEG C within 600 min, and gradually stopping the introducing of chlorine gas, helium gas and oxygen during the heating; and S5, cooling to obtain the completely-transparentcompact doped quartz glass rod. According to the present invention, chlorine gas reacts with the OH on the inner surface of a nanometer porous quartz glass rod to generate HCL, and the HCL is finallyis taken out of the preform rod by helium gas, oxygen and other gases so as to remove the OH from the core rod and effectively remove the hydroxyl group inside the porous quartz glass rod.

Description

technical field [0001] The invention relates to the field of optical fiber preparation, in particular to a method for sintering nano-porous glass materials for removing hydroxyl groups. Background technique [0002] In recent years, as the application of fiber lasers has become more and more popular, the output power of fiber lasers has continued to rise. However, in the process of pursuing high power, high-power laser output will lead to too high power density in the fiber core, which will easily cause serious nonlinearities such as stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS). effects and fiber damage. Studies have found that the use of large mode area (LMA) fibers can reduce the core power density, thereby suppressing nonlinear effects, but this method will excite higher-order modes (HOM), resulting in deterioration of the fiber output beam quality. Therefore, seeking other solutions to prepare high-doped low-refractive index core rods for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/014C03B37/018
CPCC03B37/01446C03B37/01853
Inventor 褚应波王一礴李海清
Owner 武汉长进光子技术股份有限公司