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Self-activating laser crystal of LiNd(WO4)2, its preparation method and use

A laser crystal, lithium neodymium tungstate technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of limited popularization, difficulty of high optical quality crystals, inability to put into practical use, etc. The effect of processing, moderate hardness, excellent optical properties

Inactive Publication Date: 2006-09-27
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

The world's first self-activated laser crystal was discovered in 1972 (H.G.Danielmeyer, H.P.Weber, IEEE J.Quant.Electro.QE-8(1972) 805.), and then a number of self-activated laser crystals were discovered, But because they all have various defects, they cannot be put into practical use.
At present, the most famous self-activated laser crystal is neodymium aluminum borate crystal [NdAl 3 (BO 3 ) 4 , NAB], its laser experiment has been successful, but because of its non-identical melting, it is extremely difficult to obtain crystals with high optical quality, which limits its popularization and use

Method used

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Examples

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Embodiment

[0012] Embodiment: 1. molten salt method (high temperature top seed crystal method) growth LiNd (WO 4 ) 2 laser crystal

[0013] Using the molten salt method (high temperature top seed crystal method), with a molar ratio of 60% Li 2 W 2 o 7 As a flux, in the range of 840-814°C, with a cooling rate of 0.5-1°C / day, the growth cycle is about 20 days to grow high-quality, large-size 2.5×3.2×1.2cm 3 LiNd(WO 4 ) 2 crystals.

[0014] Embodiment: 2. pulling method grows LiNd (WO 4 ) 2 laser crystal.

[0015] Li will be accurately weighed according to the ratio 2 CO 3 、WO 3 、Nd 2 o 3 Mix and grind evenly, after tableting, put in φ80×100mm 3 In a corundum crucible, the solid phase reaction was carried out at 700°C for 2 hours in a muffle furnace, and then the temperature was raised to 900°C for 18 hours. After cooling to room temperature, the raw materials synthesized for the first time were ground again, pressed into tablets, and then placed in a muffle furnace for sint...

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Abstract

This invention provides a self-activation laser crystal of tungstic acid neodymium lithium and its method for preparation and usage, which relates to artificial crystals and their growing field. The molecular formula of the crystal is LiNd(WO4)2, belonging to tetragonal system, with space group of I4(1) / a(C4h6) and crystal parameter of a=b=5.2525 ,c=11.3397 ,V=314.43 3,Dc=6.843g / cm3. Using molten salt growth method, taking Li2W2O7 for fluxing agent, in the range of 950-814 degrees, with detemperature rate of 0.5-1 degrees per day, the crystal growing. Crystal grows with lifting and pulling method, which growing temperature of about 1080 degrees, lifting rate of 0.5-0.6 millimeter per hour and crystal rotary rate of 15-30 revolutions per minuten. The crystal used as working-laser material can produce laser output of 1069nm wavelength, and it can be used in laser of spectroscopy, biochemistry, medical treatment and military affairs fields.

Description

technical field [0001] The invention relates to the field of artificial crystals and their growth, in particular to a laser crystal material used as a working substance in a solid-state laser. Background technique [0002] Self-activated laser crystal neodymium lithium tungstate and its preparation method and application. The working substance of solid laser is composed of matrix material and active ions. Its various physical and chemical properties are mainly determined by the matrix material, while its spectral characteristics and fluorescence lifetime are determined by the matrix material. The energy level structure of activated ions is determined. Since the artificial ruby ​​pulse laser was successfully developed in 1960, hundreds of laser crystals have been discovered so far, but due to various reasons, there are only a dozen kinds of laser crystals that can really be used in practice. [0003] At present, the most widely used laser crystal is yttrium aluminum garnet (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32H01S3/16
Inventor 王国富黄新阳林州斌张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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