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Spectral property adjustable rare-earth ion doped alkali earth fluoride laser crystal and preparation method thereof

An alkaline earth fluoride, rare earth ion technology, applied in chemical instruments and methods, lasers, crystal growth and other directions, can solve the problems of inability to play, low luminous intensity, etc., and achieve the effect of improving luminous intensity

Inactive Publication Date: 2016-10-26
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

However, Pr 3+ Ions doped in the same host crystal above can only achieve high-efficiency laser output in a specific band, and cannot exert the Pr 3+ The special advantage of ion laser output at multiple wavelengths
Divalent cation fluoride crystals doped with praseodymium ions (MF 2 , M=Ca or Sr, etc.) has a broad emission spectrum, but the luminous intensity is low

Method used

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  • Spectral property adjustable rare-earth ion doped alkali earth fluoride laser crystal and preparation method thereof
  • Spectral property adjustable rare-earth ion doped alkali earth fluoride laser crystal and preparation method thereof
  • Spectral property adjustable rare-earth ion doped alkali earth fluoride laser crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Growth of 0.6at% Pr:CaF by crucible drop method 2 , 0.6at%Pr0.6at%Y:CaF 2 , 0.6at%Pr1.2at%Y:CaF 2 crystal;

[0030] (1) 0.6at% Pr:CaF 2 Crystal: Weighing PrF to scale 3 (5N) 2.21g, CaF 2 (5N)144.79g;

[0031] (2)0.6at%Pr0.6at%Y:CaF 2 Crystals: Weighing PrF to scale 3 (5N) 2.70g, YF 3 (5N)1.99g and CaF 2 (5N) 175.31g;

[0032] (3) 0.6at%Pr1.2at%Y:CaF 2 Crystals: Weighing PrF to scale 3 (5N) 2.68g, YF 3 (5N)3.96g and CaF 2 (5N) 173.36 g.

[0033] The ingredients were weighed according to the above-mentioned proportions, fully mixed in a vacuum glove box, and placed in a platinum crucible. The crucible descending method is used to grow crystals, the atmosphere is high vacuum, and the vacuum degree is 2.5×10 -3 Pa, 1400°C melts the raw material and starts to grow. The crucible descends at a rate of 1.5 mm / h. After 120 hours, the crystal growth is completed, and then the temperature is lowered to room temperature at 20°C / h.

[0034] figure 1 For the 0.6at%P...

Embodiment 2

[0035] Example 2 Growth of 0.6at% Pr 3.0at% Gd:CaF by temperature gradient method 2 And 0.6at%Pr3.0at%Y:CaF 2 the crystal

[0036] Weighing PrF to scale 3 (5N) 2.00g, GdF 3 (5N)10.9g and CaF 2 (5N)127.1g and PrF 3 (5N)2.06g, YF 3 (5N)7.58g and CaF 2 (5N) 130.36g was fully mixed in a vacuum glove box, then placed in a graphite crucible, and the seed crystal was pure CaF in the direction 2 Crystal, the size of the seed crystal is Φ6*30mm. The temperature gradient method is adopted, the atmosphere is high vacuum, the raw material is melted at 1400°C and the growth starts, the cooling growth rate is 1.5°C / h, the crystal growth is completed after 120h, and then the temperature is cooled to room temperature at 20°C / h.

[0037] figure 2 Is 0.6at% Pr in embodiment 1:CaF 2 0.6at%Pr 3.0at%Gd in crystal and embodiment 2:CaF 2 and 0.6at%Pr3.0at%Y:CaF 2 The emission spectrum of the crystal at room temperature, the test excitation wavelength is 443nm, and the excitation light ...

Embodiment 3

[0038] Embodiment 3 Crucible descending method grows 0.6at%Pr1.2at%La:CaF 2 the crystal

[0039] Weighing PrF to scale 3 (5N) 1.48g, LaF 3 (5N)2.93g and CaF 2 (5N) 95.59 g. placed in a platinum crucible. The crucible descending method is used to grow crystals, the atmosphere is high vacuum, and the vacuum degree is 2.5×10 -3 Pa, 1400°C melts the raw material and starts to grow. The crucible descends at a rate of 1.5 mm / h. After 120 hours, the crystal growth is completed, and then the temperature is lowered to room temperature at 20°C / h.

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Abstract

The invention relates to spectral property adjustable rare-earth ion doped alkali earth fluoride laser crystal and a preparation method thereof. The chemical formula of the rare-earth ion doped alkali earth fluoride laser crystal is (Pr<3+>, R<3+>):MF2, in the formula, R<3+> is at least one of Y<3+>, La<3+>, Gd<3+>, Sc<3+> and Lu<3+>; the doping concentration of praseodymium ions Pr<3+> is 0.1-2.0at%; the doping concentration of R<3+> is 0.5-20.0at%. As the rare-earth praseodymium ions Pr<3+> and trivalent cation R<3+> (Y<3+>, La<3+>, Gd<3+>, Sc<3+>, Lu<3+> and the like) are added simultaneously in an MF2 medium, and the concentrations of the rare-earth praseodymium ions Pr<3+> and the trivalent cation R<3+> are adjusted, the emission intensity of fluorescence peaks of crystal visible wave bands can be improved, and the intensity ratio can be increased.

Description

technical field [0001] The invention belongs to the field of artificial crystals and laser materials, and in particular relates to a praseodymium ion-doped alkaline earth metal fluoride laser crystal. The crystal can be used as a laser working substance in the visible light band. Background technique [0002] The rapid development of the laser industry has greatly promoted the exploration and development of laser crystal materials. Visible light band laser has become one of the research hotspots and frontier topics due to its wide application in many fields such as medicine, biology, surveying and mapping, optical storage and display technology. [0003] At present, there are three main ways to obtain visible light laser, that is, to obtain visible light laser through frequency doubling, to obtain visible light through up-conversion phenomenon, and to directly obtain visible light through LD pumping. At present, blue and green lasers obtained by frequency doubling of infra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B11/00H01S3/16
CPCC30B11/00C30B29/12H01S3/1603H01S3/165
Inventor 苏良碧于浩姜大朋钱小波唐飞王静雅
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI