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Neodymium-ion-doped bivalent cation fluoride laser crystal and preparation method thereof

A divalent cation and laser crystal technology, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve problems such as fluorescence quenching effect, achieve the effect of reducing fluorescence quenching effect and improving fluorescence quantum efficiency

Active Publication Date: 2015-06-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problem that the divalent cation fluoride laser crystal doped with neodymium ions is easy to form a cluster structure in the prior art, leading to the technical problem of fluorescence quenching effect, and the purpose is to provide a new divalent cation fluoride doped with neodymium ions compound laser crystal

Method used

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  • Neodymium-ion-doped bivalent cation fluoride laser crystal and preparation method thereof
  • Neodymium-ion-doped bivalent cation fluoride laser crystal and preparation method thereof
  • Neodymium-ion-doped bivalent cation fluoride laser crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Growth of 2%Nd, 6%Y:CaF by temperature gradient method 2 the crystal

[0038] Weighing NdF to scale 3 (5N)23.78g, YF 3 (5N)51.73g, CaF 2 (5N)424.49g and PbF 2 (5N) 5.0 g. Mix well in a vacuum glove box, place in a graphite crucible, and use pure CaF in the direction as the seed crystal 2 Crystal, seed size: Φ5.8*20mm. The temperature gradient method is used to grow crystals, the atmosphere is high-purity argon atmosphere, the raw material is melted at 1430°C and the growth begins, the growth rate of cooling is 1.5°C / h, and the crystal growth is completed after 120 hours, and then the temperature is lowered to room temperature at 20°C / h; after testing, the sample The emission bandwidth at 1054nm is 19m, the fluorescence quantum efficiency is 40.12%, the fluorescence lifetime is 227.07μs, and the emission cross section is 2.43×10 -20 cm 2 .

[0039] Such as figure 1 Show the Nd grown by temperature gradient method in embodiment 1 3+ ,Y 3+ :CaF 2 Ph...

Embodiment 2

[0040] Example 2 Growth of 0.5%Nd, 2%Y:SrF by crucible drop method 2 the crystal

[0041] Weighing NdF to scale 3 (5N)1.43g, YF 3 (5N)4.16g, SrF 2 (5N)174.41g and PbF 2 (5N) 1.8 g. Fully mixed in a vacuum glove box, placed in a platinum crucible, and the seed crystal was pure SrF in the direction 2 Crystal, seed size: Φ6*28mm. The crucible descending method is used to grow crystals, the atmosphere is high vacuum, and the vacuum degree is 2.5×10 -3 Pa, 1500°C melts the raw material and starts to grow, the crucible descends at a rate of 1.5mm / h, the crystal growth is completed after 260h, and then cools down to room temperature at 20°C / h. After testing, the emission bandwidth of the sample at 1057nm is 22nm, the fluorescence quantum efficiency is 72.11%, the fluorescence lifetime is 334.97μs, and the emission cross section is 3.6×10 -20 cm 2 .

[0042] figure 2 For the Nd grown by the crucible descending method of embodiment 2 3+ ,Y 3+ :SrF 2 Photo of crystals. ...

Embodiment 3

[0043] Example 3 Pulling method to grow 3%Nd, 3%Y:CaF 2 the crystal

[0044] Weighing NdF to scale 3 (5N)14.40g, YF 3 (5N) 10.45g, CaF 2 (5N)175.15g and PbF 2 (5N) 2.0 g. Mix well in a vacuum glove box, the seed crystal is pure CaF in direction 2 Crystal, seed size: Φ6*30mm. The crystal was grown by the pulling method, and the atmosphere was CF 4 In a flowing atmosphere, the raw material is melted at 1440°C and begins to grow, the pulling rate is 2mm / h, the seed rotation rate is 20rpm, and then the temperature is lowered to room temperature at 20°C / h. After testing, the emission bandwidth of the sample at 1054nm is 16nm, the fluorescence quantum efficiency is 19.31%, the fluorescence lifetime is 103.02μs, and the emission cross section is 2.19×10 -20 cm 2 .

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Abstract

The invention discloses a neodymium-ion-doped bivalent cation fluoride laser crystal. Trivalent cations M3<+> (M=Y, Sc, La, Gd, Lu and the like) codoped with neodymium ions Nd3<+> are also doped in the laser crystal MeF2 (Me=Ca, Sr, Ba and the like). The trivalent cations M3<+> are codoped in the neodymium-ion-doped bivalent cation fluoride laser crystal, so that on the premise that the broad-band emission spectral characteristics of the laser crystal are kept, the fluorescence quenching effect of the Nd ions is reduced, the fluorescence quantum efficiency is improved, and the regulation and control of light emission wavelength, emission cross section and fluorescence lifetime are realized.

Description

technical field [0001] The invention belongs to the field of artificial laser crystal materials, in particular to a divalent cation fluoride laser crystal doped with neodymium ions. Background technique [0002] It has been a century since the discovery of the spectrum of rare earth ions. In 1906, when Becquerel was studying the spectrum of ore, he found that there was a very sharp spectral line in an ore containing rare earth and transition elements, but scientists at that time did not pay attention to it. , but also limited by the industrial level at that time, people could not conduct in-depth research on the spectrum of rare earths. It was not until Bohr's atomic theory, quantum mechanics, Bethe's crystal field theory, and Condon Shortley's atomic spectrum theory that people had a sufficient theoretical basis to guide the analysis of various new spectral phenomena. This sharp-line absorption spectrum has been confirmed by scientists to come from forbidden transitions in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B11/00
Inventor 苏良碧詹曜宇李红军王庆国钱小波姜大朋汪传勇王静雅徐军
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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