Praseodymium-gadolinium co-doped mixed calcium fluoride laser crystal and preparation method and application thereof

A technology of laser crystals and calcium fluoride, applied in chemical instruments and methods, lasers, crystal growth, etc., can solve problems such as difficult to achieve all-solid-state fs ultrafast visible light laser output, fluorescence spectrum width, etc., to achieve easy growth and repeatability High performance and large size effect

Active Publication Date: 2021-10-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, Pr doped 3+ Crystal fluorescence spectrum is wide and narrow, it is difficult to realize all-solid-state fs ultrafast visible light laser output

Method used

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  • Praseodymium-gadolinium co-doped mixed calcium fluoride laser crystal and preparation method and application thereof
  • Praseodymium-gadolinium co-doped mixed calcium fluoride laser crystal and preparation method and application thereof
  • Praseodymium-gadolinium co-doped mixed calcium fluoride laser crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Growth of Pr by temperature gradient method 0.006 Gd 0.18 Ca 0.82 f 2.186 , specifically prepared by the following method:

[0034] Growth of Pr by temperature gradient method 0.006 Gd 0.18 Ca 0.82 f 2.186 Crystal, put 35g of raw material in a graphite crucible, vacuumize the furnace, fill in high-purity argon as a protective atmosphere, raise the temperature to 1430°C at a rate of 300°C / h, keep the temperature for 4 hours until the raw material is completely melted, and use 1°C / h h cooling rate growth, the growth time is 120h. The crystals were taken out after the growth was finished and the temperature was slowly lowered. Obtain a piece of Pr with good optical quality 0.006 Gd 0.18 Ca 0.82 f 2.186 Crystals whose emission cross sections at 642 nm are of the order of 10 -19 cm, 16.4×10 –20 cm 2 , the fluorescence lifetime is 37.45, and the spectral quality factor is 614.18×10 -20 cm2 ·μs, the full width at half maximum is 3.67nm, and the quality factor o...

Embodiment 2

[0040] Growth of Pr by temperature gradient method 0.006 Gd 0.1 Ca 0.9 f 2.106 Specifically prepared by the following methods:

[0041] Growth of Pr by temperature gradient descent method 0.006 Gd 0.1 Ca 0.9 f 2.106 Crystal, starting from PrF of 5N purity 3 , GdF 3 and CaF 2 single crystal particles. After Pr ions and Gd ions are doped to replace Ca ions, according to the chemical formula Pr 0.006 Gd 0.1 Ca 0.9 f 2.106 Calculate the mass required for each raw material and weigh it accurately, put the weighed raw material into a graphite crucible, vacuumize the furnace, fill in high-purity argon as a protective atmosphere, and heat up to 1430 °C at a rate of 300 °C / h ℃, keep the temperature for 4 hours until the raw materials are completely melted, grow at a cooling rate of 1 ℃ / h, and the growth time is 120h. The crystals were taken out after the growth was finished and the temperature was slowly lowered. Obtain a piece of Pr with good optical quality 0.006 Gd ...

Embodiment 3

[0043] Growth of Pr by temperature gradient method 0.006 Gd 0.28 Ca 0.78 f 2.286 Specifically prepared by the following methods:

[0044] Growth of Pr by temperature gradient method 0.006 Gd 0.28 Ca 0.78 f 2.286 Crystal, starting from PrF of 5N purity 3 , GdF 3 and CaF 2 single crystal particles. After Pr ions and Gd ions are doped to replace Ca ions, according to the chemical formula Pr 0.006 Gd 0.28 Ca 0.78 f 2.286 Calculate the mass required for each raw material and weigh it accurately, put the weighed raw material into a graphite crucible, vacuumize the furnace, fill in high-purity argon as a protective atmosphere, and heat up to 1430 °C at a rate of 300 °C / h ℃, keep the temperature for 4 hours until the raw materials are completely melted, grow at a cooling rate of 1 ℃ / h, and the growth time is 120h. The crystals were taken out after the growth was finished and the temperature was slowly lowered. Obtain a piece of Pr with good optical quality 0.006 Gd 0...

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Abstract

The invention relates to a praseodymium-gadolinium co-doped mixed calcium fluoride laser crystal and a preparation method and application thereof. The chemical formula of the crystal is Pr 0.006 GdxCa (1-x) F (2.006 + x), the value range of x is 0.03-0.28, the crystal belongs to a cubic crystal system, and within the doping concentration range and the unit cell parameter range is described in the specification, compared with the prior art, the crystal material can achieve visible light band red light efficient laser output, and the crystal material can be applied to the fields of laser display, medical treatment, ultraviolet light obtaining through frequency doubling and the like.

Description

technical field [0001] The invention relates to the technical field of laser materials, in particular to a mixed calcium fluoride laser crystal co-doped with praseodymium and gadolinium and its preparation method and application. Background technique [0002] With the development of the information age, people pay more and more attention to the special band laser. Visible light (380-780nm) band laser has great application requirements in the fields of display, communication, atmospheric remote sensing, biomedicine, high-end manufacturing, and frequency doubling to obtain ultraviolet light. With the commercialization of blue light LD pump sources, the development of laser output in the visible light band of rare earth ion doped laser crystals has been greatly promoted. Therefore, we need to find suitable rare earth dopant ions and host materials with excellent physical and chemical properties to achieve laser output in new wavelength bands. At present, visible light rare ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B11/00H01S3/16
CPCC30B29/12C30B11/00H01S3/1603H01S3/1613H01S3/165
Inventor 田杰徐军薛艳艳王无敌董建树王庆国唐慧丽
Owner TONGJI UNIV
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