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High-efficiency mid-infrared laser crystal Pr, Er:YSGG and preparation method thereof

An infrared laser and crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc.

Active Publication Date: 2013-03-20
ANHUI 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

Therefore, in recent years, the research on scandium-containing garnet crystals has been revived abroad. However, according to the search, there are no reports on Pr, Er: YSGG laser crystals at home and abroad.

Method used

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  • High-efficiency mid-infrared laser crystal Pr, Er:YSGG and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Growth of high Er-doped 3+ Ionic concentrations of Pr, Er:YSGG crystals

[0021] Highly doped Er 3+ Ionic concentrations of Pr, Er: YSGG crystals refer to Er 3+ The doping concentration of ions is between 30-50at%, Pr 3+ The concentration is between 0.5-5at%. For example Er 3+ Concentration is 35at%, Pr 3+ The concentration is 2at%. Polycrystalline raw materials prepared by solid-phase method or liquid-phase method can grow highly Er-doped 3+ Pr,Er:YSGG single crystal.

[0022] The solid phase method is according to the following chemical reaction formula:

[0023] 3xPr 2 o 3 +3yEr 2 o 3 +3(1-x-y)Y 2 o 3 +2Sc 2 o 3 +3Ga 2 o 3 =2Pr 3x Er 3y Y (3-3x-3y) sc 2 Ga 3 o 12 , wherein x=0.5-5at%, y=30-50at%, the polycrystalline raw material of the crystal is obtained by a solid-state reaction method;

Embodiment 2

[0024] Example 2: An experimental device for realizing Pr, Er: YSGG crystal 2.7-2.8 μm band laser output

[0025] Using 965nm semiconductor laser to pump Pr, Er:YSGG(Pr 3+ The doping concentration is 2at%, Er 3+ Doping concentration of 35at%) crystal components. The experimental device is attached figure 1 . In the figure, 1 is a 965nm semiconductor laser; 2 is a focusing lens; 3 is a dielectric mirror that fully reflects the 2.7-2.8μm band and fully transmits the 965nm; 4 is the Pr, Er: YSGG crystal element; 5 is the 2.7-2.8μm band Partially transmitted, fully reflective dielectric mirror at 965nm; 6 laser energy meters. Since the wavelength around 2.7-2.8μm is in the strong absorption band of water, in this laser experimental device, it is also necessary to exclude water vapor in the resonant cavity or shorten the resonant cavity to reduce the adverse effect of water vapor on laser oscillation.

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Abstract

The invention belongs to a high-efficiency radioprotective mid-infrared laser crystal Pr, Er:YSGG. On Er<3+>:Y3Sc2Ga3O12 (Er:YSGG), the doping concentration of Er<3+> is higher than 30at%, Pr3+ is doped in the crystal, expression can be written as Pr+, Er<3+>:Y3Sc2Ga3O12, and fluorescence lifetime at a lower level can be reduced to a certain extent so as to improve the laser efficiency of the crystal.

Description

technical field [0001] The invention belongs to the field of functional crystal materials, specifically a kind of efficient Pr 3+ with Er 3+ Co-doped yttrium scandium gallium garnet laser crystal (Pr, Er: YSGG) and its preparation method. Background technique [0002] Erbium ion 4 I 11 / 2 → 4 I 13 / 2 Transition, in different substrates, can produce laser light in the 2.7-3μm band. This band overlaps with the strong absorption peak of water, so the water has a particularly high absorption rate for it. It is an ideal working band for fine surgery. This property makes Erbium lasers have been widely used in the fields of biology and medicine. In addition, by using 2.7-3μm laser-pumped infrared nonlinear crystals to realize optical parametric oscillation, a high-power infrared light source of 3-19μm can be obtained, which can be used for photoelectric countermeasures (jamming), infrared lighting, laser radar, free space communication, chemical and The detection of biological...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/28C30B15/00
Inventor 孙敦陆殷绍唐张庆礼罗建乔刘文鹏谷长江秦清海李为民韩松
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI