Self activation laser crystal scandium-strontium-ytterbium borate and preparation method thereof

A laser crystal, self-activation technology, applied in crystal growth, chemical instruments and methods, self-melt liquid pulling method, etc. Hard crystal texture, excellent optical properties, stable growth process

Inactive Publication Date: 2005-12-07
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The world's first self-activated laser crystal was discovered in 1972 (H.G.Danielmeyer, H.P.Weber, 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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Growth of YbSr by pulling method 6 Sc(BO 3 ) 6 laser crystals.

[0020] Will accurately weigh Yb according to the stoichiometric ratio 2 o 3 , SrCO 3 、Sc 2 o 3 、H 3 BO 3 Mix and grind evenly, and after tableting, react in solid state at 950°C for 24 hours in a muffle furnace, then raise the temperature to 1050°C for 15 hours. Put the synthesized above samples into φ60×40mm 3 In the platinum crucible, put it into the pulling furnace, adopt the pulling method, in N 2 In the atmosphere, when the growth temperature is 1236°C, the crystal rotation speed is 15 rpm, and the pulling speed is 1 mm / hour, a crystal with a size of φ28×20mm is grown. 3 high quality YbSr 6 Sc(BO 3 ) 6 crystals.

Embodiment 2

[0021] Embodiment 2: with Li 6 B 4 o 9 Growth of YbSr for flux 6 Sc(BO 3 ) 6 laser crystals.

[0022] The growth material is YbSr 6 Sc(BO 3 ) 6 : Li 6 B 4 o 9 =75:25 (weight ratio). Using the molten salt top seed method, in a φ60×50mm platinum crucible, the growth temperature is between 960→895°C, with a cooling rate of 2°C / day and a crystal rotation speed of 15 rpm, a crystal with a size of 30 ×28×15mm 3 high quality YbSr 6 Sc(BO 3 ) 6 crystals.

Embodiment 3

[0023] Embodiment 3: with LiBO 2 -LiF as a flux to grow YbSr 6 Sc(BO 3 ) 66 laser crystals.

[0024] The growth material is YbSr 6 Sc(BO 3 ) 6 : LiBO 2 :LiF=75:20:5 (weight ratio). Using the molten salt top seed method, in a φ60×50mm platinum crucible, the growth temperature is between 945→875°C, with a cooling rate of 3°C / day and a crystal rotation speed of 20 rpm, a crystal with a size of 26 ×23×16mm 3 high quality YbSr 6Sc(BO 3 ) 6 crystals.

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Abstract

The invention discloses a self-activation laser crystal scandium-strontium-ytterbium borate (YbSr6Sc(BO3)6) and preparation method, wherein a Czochralski method and a molten salt growth method are employed to grow YbSr6Sc(BO3)6 crystal with high quality and rather large scale, the crystal belongs to R3 space group, and the density is 4.48g/cm3. Optical spectrum and calculation show that, it is easy for the crystal to produce broadband laser output having a wavelength around 1020 nm. The solid-state laser made by the crystal can be applied into the fields of optical spectroscopy, biological medicine and military purpose.

Description

technical field [0001] The invention relates to the field of artificial crystals and crystal growth in the technical field of optoelectronic functional materials, in particular to a laser crystal material used as a working substance in a solid-state laser. technical background [0002] The solid-state laser working substance 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 energy level structure of the active ion. 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 (YAG) crystal doped with neodymium ions, which has good physical and ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22
Inventor 林州斌王国富胡祖树张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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