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Rare earth doped barium calcium fluoborate laser crystal, preparation method thereof and method for realizing laser

A technology of laser crystals and barium fluoroborate, which is applied in the field of laser materials and solid-state lasers, can solve problems such as high oxide phonon energy, increased laser design complexity and cost, and poor thermomechanical properties

Active Publication Date: 2020-12-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

In the prior art, for example, Yb, Nd doped BaCaBO 3 The luminescence of F laser crystals is mainly concentrated in the near-infrared band around 1 μm, and nonlinear optical frequency conversion must be used to realize visible laser light, which increases the complexity and cost of laser design
Therefore, how to provide an oxyfluoride crystal that can realize visible laser output to solve the problems of poor thermomechanical properties of fluorides in the prior art, difficulty in growing high-quality crystals and high phonon energy of oxides is an important issue for the whole world. Solid-state visible laser provides new oxyfluoride working medium

Method used

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  • Rare earth doped barium calcium fluoborate laser crystal, preparation method thereof and method for realizing laser
  • Rare earth doped barium calcium fluoborate laser crystal, preparation method thereof and method for realizing laser
  • Rare earth doped barium calcium fluoborate laser crystal, preparation method thereof and method for realizing laser

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preparation example Construction

[0035] The preparation method of the rare earth doped barium calcium fluoroborate laser crystal of this embodiment includes:

[0036] ① Ingredients: According to BaCa 1-2x RE x A x BO 3 F stoichiometric ratio Weigh raw materials, where RE=Pr or Dy or Sm, A=Li or Na, the value range of x is 0.001 to 0.05, and the raw materials are compounds of Ba, Ca, RE, A, B; after weighing The raw materials were placed in the mixer and mixed for 24 hours;

[0037] ②Sintering: Press the uniformly mixed polycrystalline raw material in step ① into a block, place it in a platinum crucible, and sinter at 900-1000°C for 10-50 hours in an air atmosphere to obtain a polycrystalline block;

[0038] ③Crystal growth: Press the polycrystalline material block prepared in step ② into a block, place it in a platinum growth crucible, and in an inert atmosphere, use induction or resistance heating to fully melt the raw material into a uniform melt, and use BaCaBO 3 The F single crystal is used as the se...

Embodiment 1

[0063] Example 1: Pr-Li doped BaCa 0.98 PR 0.01 Li 0.01 BO 3 F laser crystal, its preparation and the method for realizing visible laser output, comprising the following steps:

[0064] ① Ingredients: fixed x is 0.01, using BaCO 3 , CaCO 3 、Pr 2 o 3 , Li 2 CO 3 、H 3 BO 3 、BaF 2 As raw material, according to BaCa 0.98 PR 0.01 Li 0.01 BO 3 F stoichiometric ratio takes raw materials, places in mixer and mixes for 24 hours;

[0065] ② Sintering: Press the homogeneously mixed polycrystalline raw materials into blocks, place them in platinum crucibles, and sinter at 900°C for 50 hours to make them into pure-phase blocks with high density;

[0066] ③Crystal growth: Place the polycrystalline material in a platinum growth crucible, under an inert atmosphere, use induction heating to fully melt the raw material into a uniform melt, and use BaCaBO in the [100] direction 3 F seed crystal, single crystal growth is carried out according to the pulling method, the pulling sp...

Embodiment 2

[0070] Example 2: Pr-Na doped BaCa 0.98 PR 0.01 Na 0.01 BO 3 F laser crystal, its preparation and the method for realizing visible laser output, comprising the following steps:

[0071] ① Ingredients: fixed x is 0.01, using BaCO 3 , CaCO 3 、Pr 2 o 3 、Na 2 CO 3 、H 3 BO 3 、BaF 2 As raw material, according to BaCa 0.98 PR 0.01 Na 0.01 BO 3 F stoichiometric ratio takes raw materials, places in mixer and mixes for 24 hours;

[0072] ② Sintering: Press the homogeneously mixed polycrystalline raw materials into blocks, place them in platinum crucibles, and sinter at 950°C for 25 hours to make them into pure-phase blocks with high density;

[0073] ③Crystal growth: Place the polycrystalline material in a platinum growth crucible, under an inert atmosphere, use induction heating to fully melt the raw material into a uniform melt, and use BaCaBO in the [001] direction 3 F seed crystal, single crystal growth is carried out according to the pulling method, the pulling spe...

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Abstract

The invention discloses a rare earth doped barium calcium fluoborate laser crystal, a preparation method, and a method for realizing laser. Barium calcium fluoborate BaCaBO3 F is used as a matrix to be doped with rare earth ions, and meanwhile, the rare earth doped barium calcium fluoborate laser crystal is prepared by doping an equal amount of Li<+> or Na<+>. The chemical formula of the laser crystal is BaCa<1-2x>RE<x>A<x>BO<3>F, RE=Pr or Dy or Sm, A=Li or Na, and x ranges from 0.001 to 0.05. Rare earth ions Pr<3+> or Dy<3+> or Sm<3+> are added to replace lattice sites occupied by Ca in the matrix, and the same amount of Li<+> or Na<+> is doped to meet charge balance, so that the laser crystal materials BaCa<1-2x>Pr<x>Li<x>BO<3>F, BaCa<1-2x>Pr<x>Na<x>BO<3>F,BaCa<1-2x>Dy<x>Li<x>BO<3>F, BaCa<1-2x>Dy<x>Na<x>BO<3>F, BaCa<1-2x>Sm<x>Li<x>BO<3>F and BaCa<1-2x>Sm<x>Na<x>BO<3>F are formed. The method has the beneficial effects that oxyfluoride BaCaBO3F is taken as a visible laser crystal matrix, the energy level of rare earth ions is utilized, a new transition channel is adopted, and GaN-based blue light LD pumping is adopted to obtain visible waveband laser; and the prepared rare earth doped barium calcium fluoborate laser crystal combines the advantages of fluoride and oxide, and has the advantages of low phonon energy and stable mechanical and chemical properties.

Description

technical field [0001] The invention belongs to the technical field of laser materials and solid lasers, and in particular relates to a rare earth-doped barium calcium fluoroborate laser crystal and a method for preparing and realizing laser. Background technique [0002] At present, the crystals directly pumped by blue LD to obtain visible laser mainly focus on fluorides with lower phonon energy, such as YLiF 4 , GdLiF 4 、LuLiF 4 、KY 3 f 10 、BaY 2 f 8 、KYF 4 Wait. Only a small number of oxide crystals achieve direct output of visible laser light, including YAlO 3 , Y 3 Al 5 o 12 , LuAlO 3 , SrAl 12 o 19 、Sr 1-x La x Al 12-x Mg x o 19 、LaMgAl 11 o 19 . Fluorides have low phonon energy, but their poor thermomechanical properties, poor fracture resistance, and difficulty in growing high-quality crystals limit further applications. Oxide has higher hardness, thermal conductivity and stable mechanochemical properties, it is relatively easy to obtain high-q...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B15/00C30B28/02H01S3/16H01S3/0941
CPCC30B29/10C30B15/00C30B28/02H01S3/1613H01S3/1606H01S3/1615H01S3/1666H01S3/0941
Inventor 颜涛叶宁陈昱陈开创
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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