Dysprosium-terbium co-doped scandium-containing garnet laser crystal and preparation method thereof, and application of LD pumping of the crystal to realize yellow laser output

A laser crystal and garnet technology, applied in lasers, crystal growth, laser parts and other directions, can solve the problems of low stimulated emission cross-section, low thermal conductivity, and high laser threshold, and achieve the effect of reducing threshold and high thermal conductivity.

Active Publication Date: 2021-05-25
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The single-doped Dy pumped by GaN blue light LD has been reported so far 3+ Laser crystals have fewer crystals that obtain yellow laser output, mainly Dy:YAG, because Dy 3+ Particles with lower stimulated emission cross-sections and lower laser energy levels cannot relax rapidly to the ground state, resulting in high laser threshold
Furthermore, the vast majority of Dy 3+ Doped yellow laser crystals have low thermal conductivity and are unbearable due to Dy 3+ Low absorption and emission cross sections necessitate high pump power waste heat issues

Method used

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  • Dysprosium-terbium co-doped scandium-containing garnet laser crystal and preparation method thereof, and application of LD pumping of the crystal to realize yellow laser output
  • Dysprosium-terbium co-doped scandium-containing garnet laser crystal and preparation method thereof, and application of LD pumping of the crystal to realize yellow laser output
  • Dysprosium-terbium co-doped scandium-containing garnet laser crystal and preparation method thereof, and application of LD pumping of the crystal to realize yellow laser output

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: Dy 3+ ,Tb 3+ Co-doped scandium-containing garnet laser crystal Dy,Tb:YSAG

[0045] Growth Dy 3+ Doping concentration is 2at%, Tb 3+ Doping concentration of 1at% Dy 0.06 Tb 0.03 Y 2.91 sc 2 al 3 o 12 crystals. Dy in this example 3+ The concentration is 2at%, Tb 3+ The doping concentration is 1at%, that is, the molecular formula Dy x Tb y A 3-x-y sc 2 B 3 o 12 Wherein x=0.06, y=0.03, A is Y in the component, B is Al.

[0046] The preparation method is as follows: the high-purity oxide raw material is used according to the chemical reaction formula:

[0047] 0.03 Dy 2o 3 +0.0075Tb 4 o 7 +1.455Y 2 o 3 +Sc 2 o 3 +1.5Al 2 o 3

[0048] = Dy 0.06 Tb 0.03 Y 2.91 sc 2 al 3 o 12 +0.00375O 2

[0049] Accurately weigh a total of 610g, then uniformly mix the raw materials and briquette, and use high-temperature solid-phase method to sinter at 1400°C for 48 hours to obtain Dy 0.06 Tb 0.03 Y 2.91 sc 2 al 3 o 12 Polycrystalline raw m...

Embodiment 2

[0051] Example 2: GaN LD pumping Dy x Tb y A 3-x-y sc 2 B 3 o 12 Crystal Realizes Yellow Laser Output

[0052] A GaN laser diode with an output wavelength of 450nm is used as the pump source, and the end-pumped Dy x Tb y A 3-x-y sc 2 B 3 o 12 Crystal element, the element size is 3×3×10mm 3 , the two end faces have a very high degree of parallelism and are finely polished. The laser experiment device is attached Figure 5 shown. The laser resonator adopts a flat cavity structure, and the cavity mirror is composed of an input coupling mirror M1 and an output coupling mirror M2; the M1 mirror is coated with a 450nm antireflection coating and a 585nm high reflection coating, and the M2 mirror is coated with a 585nm partially transparent coating. 3-5%; the distance between M1 and M2 is 2cm-4cm. The laser output from the GaN LD is focused by the lens and then passes through M1 and is vertically incident on the crystal end face. Dy in the crystal 3+ The ions absorb th...

Embodiment 3

[0053] Example 3: Dy 3+ ,Tb 3+ Co-doped scandium-containing garnet laser crystal Dy,Tb:LuSAG

[0054] Growth Dy 3+ Doping concentration is 1at%, Tb 3+ Doping concentration of 1at% Dy 0.03 Tb 0.03 Lu 2.94 sc 2 Al 3 o 12 crystals. Dy in this embodiment 3+ The concentration is 1at%, Tb 3+ The doping concentration is 1at%, that is, the molecular formula Dy x Tb y A 3-x-y sc 2 B 3 o 12 Where x=0.03, y=0.03, A is Lu and B is Al in the components. The preparation method is as follows: the high-purity oxide raw material is used according to the chemical reaction formula:

[0055] 0.015 Dy 2 o 3 +0.0075Tb 4 o 7 +1.47Lu 2 o 3 +Sc 2 o 3 +1.5Al 2 o 3

[0056] = Dy 0.03 Tb 0.03 Lu 2.94 sc 2 Al 3 o 12 +0.00375O 2

[0057] Accurately weigh a total of 905g, then uniformly mix the raw materials and briquette, and use high-temperature solid-phase method to sinter at 1400°C for 48 hours to obtain Dy 0.03 Tb 0.03 Lu 2.94 sc 2 Al 3 o 12 Polycrystalline ra...

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Abstract

The invention discloses a dysprosium-terbium co-doped scandium-containing garnet laser crystal, a preparation method thereof and an application of LD pumping of the crystal to realize yellow laser output. The chemical expression of the crystal is Dy<x>Tb<y>A<3-x-y>Sc2B3O12. A Dy<x>Tb<y>A<3-x-y>Sc2B3O12 polycrystalline raw material is prepared by adopting a solid phase method or a liquid phase method, and then the Dy<x>Tb<y>A<3-x-y>Sc2B3O12 single crystal is grown by adopting a melt method, the GaN LD is used as a pump light source, and the Dy<x>Tb<y>A<3-x-y>Sc2B3O12 crystal is pumped to realize yellow laser output. Dysprosium and terbium are used as activating ions, and through energy resonance transfer between Dy<3+> and Tb<3+>, particles on a lower energy level <6>H<13/2> of Dy<3+> laser are transferred to a <7>F4 energy level of Tb<3+> ions, so that population inversion of Dy<3+> is easier to realize, and a yellow laser threshold value is reduced; the scandium-containing garnet laser crystal is used as a host crystal, so that Dy<3+> is easy to realize population inversion, and the crystal has high thermal conductivity and can bear the waste heat problem caused by high pumping power required by relatively low absorption and emission cross section of Dy<3+>.

Description

technical field [0001] The invention relates to the technical field of laser crystals, in particular to a dysprosium and terbium co-doped scandium-containing garnet laser crystal, a preparation method thereof, and an application of LD pumping the crystal to realize yellow laser output. Background technique [0002] The yellow laser with a wavelength of 550-600nm belongs to the most sensitive wavelength band of the human eye, so it has important applications in the fields of laser display and laser lighting, especially for space measurement and indication in heavy fog environments. In addition, yellow laser is widely used in many fields, such as the treatment of skin and eye diseases, the detection and identification of space targets, photoelectric countermeasures, high-density information storage, ocean detection and other industrial, national defense and scientific research fields. . At present, there are three main ways to realize yellow laser: dye laser, dual wavelength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22H01S3/16
CPCC30B29/22H01S3/164
Inventor 丁守军刘文鹏黄仙山任浩李泓沅
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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