Preparation method of core rod of Yb doped quartz fiber preform

A technology of silica optical fiber and prefabricated rod, which is applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problem that it is difficult to realize the preparation of rare earth doped quartz core rod with large core diameter, and it is not clear that large size rare earth doped quartz glass core rod can be obtained and other problems, to achieve the effect of low hydroxyl content, low hydroxyl content, and uniform distribution of the refractive index of the fiber core

Active Publication Date: 2013-10-30
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
However, this invention uses nano-silicon oxide raw material

Method used

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  • Preparation method of core rod of Yb doped quartz fiber preform
  • Preparation method of core rod of Yb doped quartz fiber preform
  • Preparation method of core rod of Yb doped quartz fiber preform

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Embodiment 1

[0030] The preparation method of the Yb-doped silica optical fiber preform core of the present embodiment comprises the following steps:

[0031] ① The composition of the Yb-doped silica fiber preform core is: 0.3Yb 2 o 3 -1P 2 o 5 -3Al 2 o 3 -95.7SiO2 2 Weigh the raw material silicon alkoxide Si(OC 2 h 5 ) 4 , Ytterbium Chloride Hexahydrate YbCl 3 ·6H 2 O, aluminum chloride hexahydrate AlCl 3 ·6H 2 O and Phosphate H 3 PO 4 ;

[0032] Under room temperature and magnetic stirring, according to Si(OC 2 h 5 ) 4 :C 2 h 5 OH:H 2 The ratio of O=1:2:4 (mol ratio), with NH 4 OH is the catalyst, configure a transparent sol liquid, the solution pH=8, and then add AlCl 3 ·6H 2 O, H 3 PO 4 and YbCl 3 ·6H 2 O, stirred at room temperature for 1 hour to form a transparent doped sol, and left to stand in a closed container for 10 days;

[0033] ② Put the transparent silica sol solution in an open flask and heat it in a water bath at 100°C. After the solution loses ...

Embodiment 2

[0039] The core rod glass formula: 0.1Yb 2 o 3 -1Al 2 o 3 -98.9SiO2 2 (mol%). The preparation method of this core rod glass comprises the following steps:

[0040] The first step: under room temperature and magnetic stirring, according to Si(OC 2 h 5 ) 4 :C 2 h 5 OH:H 2 The ratio of O=1:5:20 (mol ratio), using hydrochloric acid as a catalyst, configure a transparent sol liquid, and the solution pH=1. Then according to the designed core rod glass formula, add AlCl 3 ·6H 2 O and YbCl 3 ·6H 2 O, stirred at room temperature for 10 hours to form a transparent doped sol, and left to stand in a closed container for 1 day;

[0041] Step 2: Put the sol in an open flask and heat it in a water bath at 100°C. After the solution loses its fluidity and turns into a gel, keep the gel in a tube furnace with an oxygen atmosphere of 1 atmosphere and keep it warm at 800°C for 12 hours Removal of residual carbon and hydroxyl groups to obtain uniformly doped Yb 3+ and Al 3+ silic...

Embodiment 3

[0047] The mandrel glass formula: 0.15Yb 2 o 3 -8P 2 o 5 -4Al 2 o 3 -87.85SiO 2 (mol%). The preparation method of this core rod glass comprises the following steps:

[0048] The first step: under room temperature and magnetic stirring, according to Si(OCH 3 ) 4 :CH 3 OH:H 2 The ratio of O=1:10:10 (mol ratio), using hydrochloric acid as a catalyst, configure a transparent sol liquid, and the solution pH=1. Then according to the designed core rod glass formula, add AlCl 3 ·6H 2 O, H 3 PO 4 and YbCl 3 ·6H 2 O, stirred at room temperature for 5 hours to form a transparent doped sol, and left to stand in a closed container for 1 day;

[0049] Step 2: Put the sol in an open flask and heat it in a water bath at 100°C. After the solution loses its fluidity and turns into a gel, keep the gel in a tube furnace with an oxygen atmosphere of 1 atmosphere and heat at 850°C for 10 hours Removal of residual carbon and hydroxyl groups to obtain uniformly doped Yb 3+ 、Al 3+ ...

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Abstract

A preparation method of a core rod of a Yb doped quartz fiber preform. Employing a sol gel method, the preparation method prepares a rare earth doped silicon oxide powder by starting from a solution; the powder is subjected to decarburization, dehydroxylation and ball milling; and the treated powder is sintered into glass, which is processed into the core rod. The core rod obtained by the method can be used in preparation of double cladding Yb doped quartz fiber with large size, high uniformity and large mode field, and photonic crystal with large mode field and doped with Yb quartz fiber, so as to realize high laser efficiency.

Description

technical field [0001] The invention relates to an optical fiber prefabricated rod, in particular to a method for preparing a Yb-doped quartz optical fiber prefabricated rod core rod. Background technique [0002] Rare earth-doped silica fibers have been used in laser processing, optical fiber communication, air pollutant measurement and laser medical treatment. 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 ...

Claims

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Application Information

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IPC IPC(8): C03B37/014C03C13/04
CPCC03C13/045C03C3/06C03C2201/28C03C2201/3488C03C2201/36
Inventor 胡丽丽王世凯楼风光王孟于春雷冯素雅陈辉宇陈丹平周秦岭
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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