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Self excited laser crystal Sc-Sr-Nd borate and its preparation

A laser crystal, self-activation technology, applied in crystal growth, solid-state lasers, chemical instruments and methods, etc., can solve the problems of limited popularization, inability to put into practical use, difficulties with high optical quality crystals, etc. Excellent optical properties, stable growth process

Inactive Publication Date: 2006-06-21
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 NdSr by pulling method 6 Sc(BO 3 ) 6 laser crystals.

[0020] Will accurately weigh the Nd 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 1310°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 NdSr 6 Sc(BO 3 ) 6 crystals.

Embodiment 2

[0021] Embodiment 2: with Li 6 B 4 o 9 Growth of NdSr6 for flux S c(BO 3 ) 6 laser crystals.

[0022] The growth material is NdSr 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 958→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 NdSr 6 Sc(BO 3 ) 6 crystals.

Embodiment 3

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

[0024] The growth material is NdSr 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 940→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 NdSr 6 Sc(BO 3 ) 6 crystals.

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Abstract

Self-activated laser crystal scandium strontium neodymium borate and preparation method thereof relate to the field of artificial crystals, in particular to a self-activated laser crystal scandium strontium neodymium borate (NdSr 6 Sc(BO 3 ) 6 ) and its preparation method. Using the pulling method or molten salt method, high-quality, large-sized NdSr 6 Sc(BO 3 ) 6 crystals. The crystal belongs to 3 - Space group, density 4.37g / cm 3 , the refractive index is 1.75. Spectral calculation shows that the crystal has a strong absorption peak at 808nm, and the absorption coefficient is 36.10cm -1 , half peak width 18.00nm, absorption cross section 1.46×10 -20 cm 2 , suitable for pumping by laser diode (LD); in addition, it has a strong fluorescence emission peak at a wavelength of 1060nm, and the emission transition cross section is 1.31×10 -19 cm 2 , The half-peak width is 28nm, and it is easy to produce laser output with a wavelength of 1060nm. Solid-state lasers made of this crystal can be used in many fields such as spectroscopy, biomedicine, and military affairs.

Description

technical field [0001] The self-activated laser crystal scandium strontium neodymium borate and its preparation method relate to artificial crystals and crystal growth methods in the technical field of optoelectronic functional materials, in particular to a laser crystal material used as a working substance in solid-state lasers. Background technique [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 crys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22H01S1/02
Inventor 林州斌王国富胡祖树
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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