High-efficiency mid-infrared laser crystal and preparation method thereof

An infrared laser, crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., to achieve the effect of accelerating the evacuation rate, reducing the lifetime, and reducing the probability of multi-phonon relaxation

Active Publication Date: 2012-08-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, in recent years, the research on scandium-containing garnet crystals has been revived at home and abroad. However, according to the search, there is no research on Cr, Er, Re:YSGG (Re=Eu, Tb) laser crystals at home and abroad. to report

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  • High-efficiency mid-infrared laser crystal and preparation method thereof
  • High-efficiency mid-infrared laser crystal and preparation method thereof
  • High-efficiency mid-infrared laser crystal and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0026] Example 2: Growing Cr 3+ The concentration is 2at%, Er 3+ The concentration is 30at%, Eu 3+ The concentration is 0.5at% Cr 0.04 Er 0.9 Eu 0.015 Y 2.085 sc 1.96 Ga 3 o 12 the crystal

[0027] Cr, Er, Eu: YSGG crystal refers to Cr 3+ The doping concentration is 0.1~5at%, Er 3+ The doping concentration of Eu 3+ The doping concentration is between 0.1 and 5 at%. Cr in this example 3+ The concentration is 2at%, Er 3+ The concentration is 30at%, Eu 3+ The concentration of is 0.5 at%, ie x=0.02, y=0.3, z=0.005. According to the chemical reaction formula 2xCr 2 o 3 +3yEr 2 o 3 +3zEu 2 o 3 +3(1-y-z)Y 2 o 3 +2(1-x)Sc 2 o 3 +3Ga 2 o 3 =2Cr 2x Er 3y Eu 3z Y 3(1-y-z) sc 2(1-x) Ga 3 o 12 (where x=0.02, y=0.3, z=0.005) weighed, uniformly mixed and pressed into blocks, and sintered at 1450° C. for 30 hours by solid-state method to obtain Cr, Er, Eu:YSGG polycrystalline raw materials. 700 grams of Cr, Er, Eu: YSGG raw material packing diameter is in th...

Embodiment 3

[0028] Example 3: Growing Cr 3+ The concentration is 1.5at%, Er 3+ The concentration is 15at%, Tb 3+ The concentration is 1.5at% Cr 0.03 Er 0.45 Tb 0.045 Y 2.505 sc 1.97 Ga 3 o 12 the crystal

[0029] Cr, Er, Tb: YSGG crystal refers to Cr 3+ The doping concentration is 0.1~5at%, Er 3+ The doping concentration of Tb is between 5 and 30at%. 3+ The doping concentration is between 0.1 and 5 at%. Cr in this example 3+ The concentration is 1.5at%, Er 3+ The concentration is 15at%, Tb 3+ The concentration of is 1.5 at%, ie x=0.015, y=0.15, z=0.015. According to the chemical reaction formula 2xCr 2 o 3 +3yEr 2o 3 +3zTb 2 o 3 +3(1-y-z)Y 2 o 3 +2(1-x)Sc 2 o 3 +3Ga 2 o 3 =2Cr 2x Er 3y Tb 3z Y 3(1-y-z) sc 2(1-x) Ga 3 o 12 (where x=0.015, y=0.15, z=0.015) weighed, uniformly mixed and pressed into blocks, and sintered at 1500°C for 24 hours by solid-state method to obtain Cr, Er, Tb:YSGG polycrystalline raw materials. 600 grams of Cr, Er, Tb:YSGG raw mater...

Embodiment 4

[0030] Example 4: Growing Cr 3+ The concentration is 2at%, Er 3+ The concentration is 10at%, Tb 3+ The concentration is 2at% Cr 0.04 Er 0.3 Tb 0.06 Y 2.64 sc 1.96 Ga 3 o 12 the crystal

[0031] Cr, Er, Tb: YSGG crystal refers to Cr 3+ The doping concentration is 0.1~5at%, Er 3+ The doping concentration of Tb is between 5 and 30at%. 3+ The doping concentration is between 0.1 and 5 at%. Cr in this example 3+ The concentration is 2at%, Er 3+ The concentration is 10at%, Tb 3+ The concentration of is 2at%, that is, x=0.02, y=0.1, z=0.02. According to the chemical reaction formula of the oxide raw material: 2xCr 2 o 3 +3yEr 2 o 3 +3zTb 2 o 3 +3(1-y-z)Y 2 o 3 +2(1-x)Sc 2 o 3 +3Ga 2 o 3 =2Cr 2x Er 3y Tb 3z Y 3(1-y-z) sc 2(1-x) Ga 3 o 12 ((where x=0.02, y=0.1, z=0.02) weighed, the oxides weighed were respectively mixed with appropriate amount of HNO 3 Mix evenly after dissolving, co-titrate the mixed solution with ammonia water by liquid phase co-prec...

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Abstract

High-efficiency mid-infrared laser crystal is used for outputting mid-infrared laser with the wave band ranging from 2.7 micrometers to 3 micrometers. The molecular formula of the crystal is Cr2xEr3yRe3zY3(1-y-z)Sc2(1-x)Ga3O12, wherein the Er is the abbreviation for Er3+, the Re is the abbreviation for Re3+, the Y is the abbreviation of Y3+, the Cr is the abbreviation for Cr3+, the Re3+ is Eu3+ or Tb3+, both the Re3+ and the Er3+ substitute Y3+ ions in 3Sc2Ga3O12 host crystal, the substitution concentration of the Er3+ ranges from 5at% to 30at%, namely the y ranges from 0.05 to 0.3, the substitution concentration of the Re3+ ranges from 0.1at% to 5at%, namely, the z ranges from 0.001 to 0.05, and the substitution concentration of the Cr3+ ranges from 0.1at% to 5at%, namely, the x ranges from 0.001 to 0.05. ions of the Re3+(Re=Eu, Tb) have an energy level structure close to ions of the Er3+, the evaporation rate of particles with the energy level of 4I13/2 can be increased by the aid of resonance energy transfer among the ions of the Re3+ and the ions of the Er3+, the life time of the energy level of laser with the wave band ranging from 2.7 micrometers to 3 micrometers can be shortened to a certain degree, accordingly, output efficiency and power of laser of the crystal can be effectively enhanced, and the high-efficiency mid-infrared laser crystal has important application in the fields of bio-medical treatment, optical parameter oscillation, electro-optical countermeasure and the like.

Description

technical field [0001] The invention relates to the fields of laser materials and crystal growth, in particular to a high-efficiency mid-infrared laser crystal and a preparation method thereof. technical background [0002] Er 3+ Ionic 4 I 11 / 2 → 4 I 13 / 2 Transition, in different materials, can produce laser light in the 2.7-3μm band. Since this band is in the strong absorption peak of water, water has a particularly high absorption rate for it. When it is used to cut human tissues with high water content, the penetration depth is only about 1μm, the range of thermal damage is small, so it is an ideal working band for fine laser surgery, which makes erbium laser widely used in the fields of laser medicine and biotechnology. In addition, using lasers in this band to pump infrared nonlinear crystals to achieve optical parametric oscillation can obtain high-power mid-infrared lasers in the range of 3 to 19 μm, which can be used in lidar, photoelectric countermeasures, dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/28C30B15/00H01S3/16
Inventor 罗建乔孙敦陆张庆礼王小飞刘文鹏李秀丽殷绍唐
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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