Preparation method of low-mass Yb3+ doped silica fiber preform mandrel

A quartz fiber and preform technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve problems such as poor doping uniformity, achieve the effects of low impurity content, ensure doping uniformity, and reduce refractive index

Active Publication Date: 2016-10-12
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiencies and defects of the prior art, on the basis of the sol-gel method developed in the early stage to prepare Yb-doped core rod glass, and carries out innovative technical impro

Method used

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  • Preparation method of low-mass Yb3+ doped silica fiber preform mandrel
  • Preparation method of low-mass Yb3+ doped silica fiber preform mandrel
  • Preparation method of low-mass Yb3+ doped silica fiber preform mandrel

Examples

Experimental program
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Effect test

Example Embodiment

[0030] Mandrel Glass Example 1:

[0031] The core rod glass formula of this embodiment: 0.2Yb 2 O 3 -2Al 2 O 3 -97.8SiO 2 (mol%). The preparation method of the core rod glass includes the following steps:

[0032] The first step: under room temperature and magnetic stirring, according to Si(OC 2 H 5 ) 4 : C 2 H 5 OH: H 2 O=1:2:4 (mol%) ratio, with NH 4 OH is a catalyst, a transparent sol liquid is prepared, and the pH of the solution is 8. Then add AlCl in sequence according to the designed mandrel glass formula 3 ·6H 2 O and YbCl 3 ·6H 2 O, stir at room temperature for 3 hours to form a transparent doped sol, and let stand in a closed container for 10 days;

[0033] Step 2: Put the sol in an open flask and heat it in a water bath at 100°C. After the solution loses fluidity and becomes a gel, place the gel in a tube furnace and start heating from room temperature for 4 hours to 600°C. Carry out dehydration and decarburization treatment, during which oxygen is supplied, and the oxyg...

Example Embodiment

[0037] Mandrel Glass Example 2:

[0038] The core rod glass formula: 0.1Yb 2 O 3 -1Al 2 O 3 -98.9SiO 2 (mol%). The preparation method of the core rod glass includes the following steps:

[0039] The first step: under room temperature and magnetic stirring, according to Si(OC 2 H 5 ) 4 : C 2 H 5 OH: H 2 O=1:5:20 (mol ratio), with hydrochloric acid as a catalyst, a transparent sol liquid, pH=1. Then add AlCl according to the designed mandrel glass formula 3 ·6H 2 O and YbCl 3 ·6H 2 O, stir at room temperature for 3 hours to form a transparent doped sol, and let stand in a closed container for 10 days;

[0040] Step 2: Put the sol in an open flask and heat it in a water bath at 100°C. After the solution loses fluidity and becomes a gel, place the gel in a tube furnace and start heating from room temperature for 4 hours to 600°C. Carry out dehydration and decarburization treatment, during which oxygen is supplied, and the oxygen flow is 30L / h. Then cool to obtain doped quartz powder; ...

Example Embodiment

[0045] Mandrel Glass Example 3

[0046] The core rod glass formula: 0.035Yb 2 O 3 -1P 2 O 5 -1Al 2 O 3 -97.965SiO 2 (mol%). The preparation method of the core rod glass includes the following steps:

[0047] The first step: under room temperature and magnetic stirring, according to Si(OCH 3 ) 4 : CH 3 OH: H 2 O=1:10:10 (mol ratio), with hydrochloric acid as a catalyst, a transparent sol liquid, pH=1. Then add AlCl according to the designed mandrel glass formula 3 ·6H 2 O, H 3 PO 4 And YbCl 3 ·6H 2 O, stir at room temperature for 4 hours to form a transparent doped sol, and let stand in a closed container for 5 days;

[0048] Step 2: Put the sol in an open flask and heat it in a water bath at 100°C. After the solution loses fluidity and becomes a gel, place the gel in a tube furnace and start heating from room temperature for 4 hours to 600°C. Carry out dehydration and decarburization treatment, during which oxygen is supplied, and the oxygen flow is 25L / h. Then cool to obtain dope...

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Abstract

The invention discloses a preparation method of a Yb3+ doped silica fiber preform mandrel. The preparation method comprises the steps that silicon oxide powder doped with rare earth and co-doping agent Al, P and the like is prepared; decarbonization, dehydroxylation and ball-milling treatment are carried out; high-temperature purification is carried out; the purified powder biscuit is smelted at a high temperature to form glass, and the glass is prepared into the mandrel. The Yb3+ doped silica fiber preform mandrel with the diameter range of 3-18 mm and the length range of 50-300 mm can be prepared, the doping evenness of the mandrel is quite good, and the refractive index fluctuation of the mandrel delta n is smaller than 2*10<-4>. Correspondingly, the mandrel and a pure silica glass sleeving bar are adopted, the preform is prepared through a pipe-bar method, after optical fiber is formed through drawing, the refractive index evenness delta n of the optical fiber exceeds the detection limit of an instrument, and the back bottom loss of the optical fiber at the 1200 nm position is lowered from 0.5-1 dB to 0.05 dB/m and reaches the loss level of MCVD technology.

Description

technical field [0001] The invention relates to an optical fiber prefabricated core rod, especially a large size, high uniformity, low loss Yb 3+ A method for preparing a doped silica optical fiber prefabricated core rod. Its main application is to prepare rare earth-doped large-mode-field silica fibers, including large-mode-field cladding fibers and various microstructured fibers Background technique [0002] Yb 3+ Doped silica fiber has been successfully used in industrial processing, medical treatment, energy, military and other fields due to its advantages of high laser power and good thermomechanical properties. For traditional Yb 3+ For doped silica-clad fibers (core size is generally less than 20 μm), the main factors that limit the further improvement of its laser performance are the nonlinear effect and laser damage caused by the increase of power density at the fiber end face. In order to solve this problem, large mode field fiber has been developed and has bec...

Claims

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Application Information

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IPC IPC(8): C03B37/012C03C13/04
CPCC03C3/06C03C4/12C03C13/045C03C2201/28C03C2201/3488C03C2201/36C03B37/011C03B2201/36
Inventor 王世凯胡丽丽于春雷许文彬楼风光王孟冯素雅张磊陈丹平
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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