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A kind of tm/tb co-doped silica fiber for 1.7μm fiber laser and its preparation method

A fiber laser and quartz fiber technology, which is applied in the field of optical fiber, can solve the problems of difficult uniform doping and achieve good repeatability, high anti-damage threshold power, and high success rate

Active Publication Date: 2020-04-03
XI'AN 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] According to different requirements, the co-doped ions of silica fiber have different options, but usually only for the core layer (co-doped into the core layer); due to the limitations of many factors such as preparation process and doping technology, how to achieve The uniform doping of the
Perhaps because of this, at present, there is no information about Tm at home and abroad. 3+ / Tb 3+ Related reports on the structure and preparation of co-doped silica fiber

Method used

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  • A kind of tm/tb co-doped silica fiber for 1.7μm fiber laser and its preparation method
  • A kind of tm/tb co-doped silica fiber for 1.7μm fiber laser and its preparation method

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Embodiment 1

[0023] 1) Using chemical vapor deposition method combined with chelate precursor doping technology, the Tm 3+ and Tb 3+ Chelate Tm(thd) 3 and Tb(thd) are uniformly mixed into the deposition layer in the quartz tube in turn to form the preform core layer and the inner cladding layer respectively, and then the outer cladding structure is formed by adjusting the formula composition of the adjacent deposition layer, and finally the optical fiber is formed by high temperature sintering and rod shrinkage process Preform. Among them, the core layer formula components are: Tm(thd) 3 : 0.5%, SiCl 4 : 35%, GeCl 4 : 20%, SiF 4 : 18%, POCl 3 : 20%, AlCl 3 : 6.5%, the inner cladding formula components are: Tb(thd) 3 : 2%, SiCl 4 : 35%, GeCl 4 : 20%, SiF 4 : 18%, POCl 3 : 20%, AlCl 3 : 5%, the outer cladding formula components include: SiCl 4 : 40%, GeCl 4 : 15%, SiF 4 : 30%, POCl 3 : 15%. The deposition temperature is 1300°C, and the pressure difference in the deposition ...

Embodiment 2

[0027] 1) Using chemical vapor deposition method combined with chelate precursor doping technology, the Tm 3+ and Tb 3+ Chelate Tm(thd) 3 and Tb(thd) are uniformly mixed into the deposition layer in the quartz tube in turn to form the preform core layer and the inner cladding layer respectively, and then the outer cladding structure is formed by adjusting the formula composition of the adjacent deposition layer, and finally the optical fiber is formed by high temperature sintering and rod shrinkage process Preform. Among them, the core layer formula components are: Tm(thd) 3 : 1%, SiCl 4 : 40%, GeCl 4 : 18%, SiF 4 : 17%, POCl 3 : 18%, AlCl 3 : 6%, the inner cladding formula component is: Tb(thd) 3 : 1%, SiCl 4 : 40%, GeCl 4 : 18%, SiF 4: 17%, POCl 3 : 18%, AlCl 3 : 6%, the outer cladding formula components include: SiCl 4 : 45%, GeCl 4 : 13%, SiF 4 : 27%, POCl 3 : 15%. The deposition temperature is 1350°C, and the pressure difference in the deposition tube is...

Embodiment 3

[0031] 1) Using chemical vapor deposition method combined with chelate precursor doping technology, the Tm 3+ and Tb 3+ Chelate Tm(thd) 3 and Tb(thd) are uniformly mixed into the deposition layer in the quartz tube in turn to form the preform core layer and the inner cladding layer respectively, and then the outer cladding structure is formed by adjusting the formula composition of the adjacent deposition layer, and finally the optical fiber is formed by high temperature sintering and rod shrinkage process Preform. Among them, the core layer formula components are: Tm(thd) 3 : 2%, SiCl 4 : 50%, GeCl 4 : 15%, SiF 4 : 15%, POCl 3 : 13%, AlCl 3 : 5%, the inner cladding formula component is: Tb(thd) 3 : 0.5%, SiCl 4 : 50%, GeCl 4 : 15%, SiF 4 : 15%, POCl 3 : 13%, AlCl 3 : 6.5%, the outer cladding formula components include: SiCl 4 : 50%, GeCl 4 : 10%, SiF 4 : 25%, POCl 3 : 15%. The deposition temperature is 1450°C, and the pressure difference in the deposition tu...

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Abstract

The invention provides a Tm / Tb co-doped silica optical fiber used for a 1.7-[mu]m fiber laser and a production method of the Tm / Tb co-doped silica optical fiber used for the 1.7-[mu]m fiber laser. The optical fiber has the characters of even rare earth ion doping, a proper fluorescence centre wavelength, high signal gain and the like. The optical fiber is composed of a core layer, an inner cladding and an outer cladding, and is produced by means of a modified chemical vapor deposition (MCVD) method in combination with a chelate precursor doping technology (CPDT), wherein a formula of the core layer comprises the components: 0.5-2% of Tm(thd)3, 30-50% of SiCl4, 5-20% of GeCl4, 10-20% of SiF4, 10-20% of POCl3 and 5-10% of AlCl3, and a formula of the inner cladding comprises the components: 0.5-2% of Tb(thd)3, 30-50% of SiCl4, 5-20% of GeCl4, 10-20% of SiF4, 10-20% of POCl3 and 5-10% of AlCl3.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and relates to a quartz optical fiber for a 1.7 μm optical fiber laser and a preparation method thereof. Background technique [0002] The 1.7μm band is just in the trough position between the two strong absorption bands of water (1400-1600nm and 1900-2200nm), so the absorption of this band by water molecules is very small. In addition, the 1.7 μm band is just in the strongest absorption band of the C-H bond in the polymer molecule. These unique characteristics of the 1.7μm band make ultrafast lasers in this band ideal for optical coherence tomography (OCT), laser medical treatment, femtosecond photon microscopy, laser processing, femtosecond optical frequency comb, multiphoton microscopy (MPM) ) and other fields have excellent application prospects. [0003] At present, thulium-doped silica fiber is the main gain matrix in 1.7μm band fiber laser. However, because the fiber has many sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/018C03B37/027H01S3/067
CPCC03B37/018C03B37/027H01S3/06708H01S3/06716H01S3/06733
Inventor 肖旭升郭海涛许彦涛
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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