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A high-efficiency radiation-resistant laser crystal and its preparation method

A laser crystal, anti-radiation technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., to achieve the effect of high-efficiency pumping

Inactive Publication Date: 2011-12-14
HEFEI INSTITUTES OF PHYSICAL SCIENCE - 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 research reports on Yb, Ho: GSGG laser crystals at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Growing Yb 3+ The concentration is 10at%, Ho 3+ Concentration of 1at% Gd 2.67 Yb 0.3 Ho 0.03 sc 2 Ga 3 o 12 the crystal

[0021] Yb, Ho:GSGG crystal refers to Yb 3+ The doping concentration is between 5-20at%, Ho 3+ The doping concentration of ions is between 0.5-5 at%. Yb in this embodiment 3+ The concentration is 10at%, Ho 3+ The concentration is 1 at%, ie x=0.1, y=0.01. According to the chemical reaction formula 3xYb 2 o 3 +3yHo 2 o 3 +3Gd 2 o 3 +3Sc 2 o 3 +2Ga 2 o 3 = 2Gd 3(1-x-y) Yb 3x Ho 3y sc 2 Ga 3 o 12 (where x=0.1, y=0.01) weighed, uniformly mixed and compacted, and sintered at 1300° C. for 48 hours using a solid-state method to obtain a Yb, Ho: GSGG polycrystalline raw material. Put 600 grams of Yb, Ho: GSGG polycrystalline raw materials into an iridium crucible with a diameter of 60mm, put the iridium crucible into a laser crystal pulling furnace, and fill the furnace with nitrogen as a protective gas after vacuuming (1...

Embodiment 2

[0022] Example 2: Growing Yb 3+ The concentration is 20at%, Ho 3+ Concentration of 0.5at% Gd 2.385 Yb 0.6 Ho 0.015 sc 2 Ga 3 o 12 the crystal

[0023] Yb, Ho:GSGG crystal refers to Yb 3+ The concentration is between 5-20at%, Ho 3+ The doping concentration of ions is between 0.5-5 at%. Yb in this embodiment 3+ The concentration is 20at%, Ho 3+ The concentration is 0.5 at%, ie x=0.2, y=0.005. According to the chemical reaction formula 3xYb 2 o 3 +3yHo 2 o 3 +3Gd 2 o 3 +3Sc 2 o 3 +2Ga 2 o 3 = 2Gd 3(1-x-y) Yb 3x Ho 3y sc 2 Ga 3 o 12 (wherein x=0.2, y=0.005) weighed, and the oxides weighed were respectively mixed with HNO 3 Mix evenly after dissolving, co-titrate the mixed solution with ammonia water by liquid-phase co-precipitation method, keep the pH value at about 12, and centrifuge the mixed solution after co-precipitation to obtain the gel-like precursor, wash and dry Dry, and finally sinter at 1000°C for 12 hours to obtain Yb, Ho: GSGG polycrystal...

Embodiment 3

[0024] Example 3: Growing Yb 3+ The concentration is 8at%, Ho 3+ Concentration of 2at% Gd 2.7 Yb 0.24 Ho 0.06 sc 2 Ga 3 o 12 the crystal

[0025] Yb, Ho:GSGG crystal refers to Yb 3+ The concentration is between 5-20at%, Ho 3+ The doping concentration of ions is between 0.5-5 at%. Yb in this embodiment 3+ The concentration is 8at%, Ho 3+ The concentration is 2at%, ie x=0.08, y=0.02. The polycrystalline raw material is prepared by the sol-gel method, and the oxide raw material is prepared according to the chemical reaction formula 3xYb 2 o 3 +3yHo 2 o 3 +3Gd 2 o 3 +3Sc 2 o 3 +2Ga 2 o 3 = 2Gd 3(1-x-y) Yb 3x Ho 3y sc 2 Ga 3 o 12 (wherein x=0.08, y=0.02) take by weighing, wherein Ga 2 o 3 Use Ga alkoxide instead, and the other oxides weighed by HNO 3 After dissolving, it is evenly mixed with Ga alkoxide solution to form a sol, which is left to stand for 24 hours to form a gel, dried, and finally sintered at 1000°C for 12 hours to obtain Yb, Ho:GSGG pol...

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PUM

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Abstract

The invention relates to a high-efficiency anti-radiation Yb3+ sensitized Ho3+ doped gadolinium gallium scandium garnet laser crystal, which belongs to the field of artificial crystal materials. The chemical expression of the crystal is Yb3+, Ho3+: Gd3Sc2Ga3O12 (can be abbreviated as Yb, Ho: GSGG), both Yb3+ and Ho3+ replace Gd3+ at the center of the oxygen dodecahedron in the crystal, Yb3+ acts as a pump for sensitizing ions to absorb The energy of the pump light is transferred to the Ho3+ ions, and through the transition between the 5I6 and 5I7 energy levels of the Ho3+ ions, the laser output with a wavelength near 2.9 μm can be realized by efficient LD pumping. Lasers in this band have important applications in the fields of biomedicine, optical parametric oscillation, and photoelectric countermeasures. Since the Yb, Ho:GSGG laser crystal of the present invention has the ability to resist high-intensity gamma rays and other ray radiation, it can not only meet the requirements of ground applications, but also meet the requirements of radiation environment and space environment applications.

Description

technical field [0001] The invention belongs to the field of artificial crystal materials, in particular to a high-efficiency radiation-resistant laser crystal and a manufacturing method. Background technique [0002] Lasers used in radiation environments and space environments will be radiated by high-energy particles such as gamma rays and cosmic rays, which requires lasers to have the ability to resist high-energy ray radiation. is of great significance. [0003] Gadolinium scandium gallium garnet crystal Gd 3 sc 2 Ga 3 o 12 (GSGG) is a laser working matrix with excellent performance. The crystal structure belongs to the cubic crystal system, and single crystals with high optical quality can be grown by the melt pulling method. Zharikov (E.V.Zharikov, et al.Effect of UV-and γ-irradiation on the lasing characteristics of neodymium lasers, Bull.Acad.Sei.USSR, Phys.SHo., 1984, 48:103) and others' experimental proof, Nd , Cr: GSGG laser is subjected to ultraviolet light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B27/02
Inventor 孙敦陆张庆礼罗建乔刘文鹏谷长江秦清海李为民韩松江海河殷绍唐
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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