CN1318659C - Neodymium-doped strontium-lanthanum borate ( Sr3La(BO3)3 ) laser crystal and its preparation method - Google Patents
Neodymium-doped strontium-lanthanum borate ( Sr3La(BO3)3 ) laser crystal and its preparation method Download PDFInfo
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- CN1318659C CN1318659C CNB031456847A CN03145684A CN1318659C CN 1318659 C CN1318659 C CN 1318659C CN B031456847 A CNB031456847 A CN B031456847A CN 03145684 A CN03145684 A CN 03145684A CN 1318659 C CN1318659 C CN 1318659C
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Abstract
The present invention relates to the field of an artificial crystal, particularly relates to a laser crystal doped by neodymium and strontium lanthanum borate (Nd<3+>: Sr3La(BO3)3) and a preparation method thereof. The Nd<3+>: Sr3La(BO3)3 crystal with large size is grown by adopting a crystal pulling method (Czochralski method), wherein the growth temperature of the crystal is about 1340 DEG C, the rotary speed of the crystal is from 10 to 15 revolutions per minute, and the pulling is from 0.5 to 1.0 mm/hr; the crystal belongs to a Pnma space group, density is 3.5 g/cm<3>, and refractivity is 1.78. Spectral experiment and calculation indicate that when Nd-doped concentration is 3 at%, the crystal has a strong absorption peak at the position of 806 nm, half peak width is 10 nm, absorption cross section is 4.67*10<-20>cm<2>, and the crystal is suitable for pumping by adopting a laser diode (LD); in addition, the crystal has a strong fluorescence emission peak at the wavelength of 1060 nm, emission transition cross section is 1.86*10<-19> cm<2>, the half peak width is 28 nm, and the crystal is easy to generate laser with the wavelength of 1060 nm for output. A solid laser made from the crystal can be used for a plurality of fields of spectroscopy, biomedicine, military affairs, etc.
Description
Technical field
The present invention relates to artificial lens and field of crystal growth in the technical field of optoelectronic functional materials, especially relate to a kind of laser crystal material as the operation material in the solid laser.
Background technology
Solid laser working substance is made up of substrate material and active ions, and its various physics and chemical property are mainly by the substrate material decision, and its spectral response curve and fluorescence lifetime etc. are then determined by the level structure of active ions.From nineteen sixty, succeeded in developing since the synthetic ruby pulsed laser, up to now, hundreds of laser crystalss have been found, but owing to reasons such as the heat of restriction, the crystal growth difficulty of gain, the spectrum property that is difficult to mix active ions, difference or difference and mechanical propertys, most laser crystal material all can not really drop in the practical application.The laser crystals that can really obtain practical application has only ten to plant.
At present, most widely used laser crystals is yttrium aluminum garnet (YAG) crystal of Nd ion doped, and it has various preferably physics and chemical property, and is easy to grow high optical quality, large-sized gem-quality crystal.But it is narrow that it exists spectral line of absorption, is not suitable for carrying out with LD the shortcoming of pumping, and the LD pumping will be the developing direction of laser pumping source from now on.
All actively seeking various physics, chemical property and mechanical property excellence both at home and abroad at present, and be easy to grow high optical quality, large-sized high-quality laser crystal material, and this crystal to be suitable for the LD pumping.Neodymium ion is used as active ions widely owing to have spectrum property preferably.The borate family crystal has better physical chemistry and mechanical property, and grows high-quality monocrystalline easily, becomes the choosing of the hot topic of laser host material.As crystal such as YCOB, GdCOB, YAB, Sr
3La (BO
3)
3Compound is two borate M
3Ln (BO
3)
3(M=Ca, Sr, Ba and Ln=La-Lu, Y) series compound is a kind of, is obtained powder at first by solid-phase synthesis.Also do not have at present growing crystal report.
Summary of the invention
Purpose of the present invention just is to develop a kind of new laser crystals, can directly use photoflash lamp and the laser crystal material LD pumping, that have higher conversion efficiency.
Nd
3+: Sr
3La (BO
3)
3Crystal belongs to rhombic system, has Pnma spacer structure.Wherein neodymium ion is as dopant ion, the crystallographic site that replaces lanthanum ion, the doping content of neodymium is between 0.05at%～10at%, when doping content is 3at%, fluorescence lifetime (τ) is 65 μ s, its fluorescence lifetime is the function of neodymium ion concentration, can mix the neodymium ion of different concns according to different needs.Experimental result shows the laser of its exportable 1060nm wavelength, can be used as working-laser material.
Neodymium-doped lanthanum strontium is a kind of congruent compound, can adopt crystal pulling method (Czochralski method) to grow big monocrystalline.
Concrete chemical reaction is as follows:
(1-x)La
2O
3+xNd
2O
3+2Sr
3CO
3+6H
3BO
3→2Sr
3La
(1-x)/2Nd
x/2(BO
3)
3+2CO
2+9H
2O
Used material purity and producer are as follows:
| The medicine name | Purity | Producer |
| Nd 2O 3 | 99.99％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| SrCO 3 | 99.9％ | Shanghai the May 4th chemical reagent factory |
| La 2O 3 | 99.99％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| H 3BO 3 | 99.9％ | Shanghai chemical reagents corporation of Chinese Medicine group |
Main growth conditions is as follows: growth be in the iridium crucible, rare gas element is (as N
2, Ar etc.) carry out under the atmosphere, the processing parameter of crystal growth is: growth temperature is about 1340 ℃, the crystal rotating speed is 10-15 rev/min, pull rate be the 0.5-1.0 millimeter/hour.Concrete process of growth is seen embodiment.
With the Nd that grows
3+: Sr
3La (BO
3)
3Crystal has carried out the collection of diffraction data on four-circle diffractometer, structural analysis shows that it belongs to rhombic system, and spacer is Pnma, and unit cell parameters is a=7.46 , b=8.91 , c=16.54 , V=1100
3, Z=4, density 3.5g/cm
3Adopting oil-immersion method to record its specific refractory power is 1.78.
With the Nd that grows
3+: Sr
3La (BO
3)
3Crystal carries out the analytical test of absorption spectrum, fluorescence spectrum and fluorescence lifetime etc., and the result shows: mix Nd concentration when 3at%, Nd
3+: Sr
3La (BO
3)
3Crystalline master absorption peak is at 806nm, and its peak width at half height is 10nm, and the absorption jump cross section is 4.67 * 10
-20Cm
2, be very suitable for adopting the AsGaAl semiconductor laser to carry out pumping in the bigger peak width at half height in 806nm place, help the absorption of laser crystals to pump light, improve pumping efficiency.It is at the emission transition cross section σ at 1060nm place
EmBe 1.86 * 10
-19Cm
2, peak width at half height (FWHM) is 28nm, fluorescence lifetime is 65 μ s,
Nd of the present invention
3+: Sr
3La (BO
3)
3Crystal can go out large-sized monocrystalline with Czochralski grown, and crystal has optical characteristics preferably, is easy to obtain laser output with flash lamp pumping and LD pumping, and laser output wavelength is 1060nm, and this crystal can be used as a kind of laser crystals preferably.
Embodiment
Realize that preferred version of the present invention is as follows:
With crystal pulling method (Czochralski method) grow doping concentration is 3.0at.%Nd
3+Sr
3La (BO
3)
3Laser crystals.
Will be by the accurate load weighted La of stoichiometric ratio
2O
3, Nd
2O
3, Sr
3CO
3, H
3BO
3Mix, grind evenly, behind the compressing tablet, in retort furnace under 900 ℃ of conditions solid phase synthesis 24 hours, be warming up to 1000 ℃ of solid phase synthesis again 24 hours, the sample that solid phase synthesis is the good Φ 70 * 50mm that packs into
3Iridium Crucible and place lifting furnace, adopt crystal pulling method, at N
2In the atmosphere, growth temperature is about 1340 ℃, and the crystal rotating speed is 10 rev/mins, and pull rate is under 1.0 millimeters/hour the condition, to have grown and be of a size of Φ 20 * 30mm
3High-quality Nd
3+: Sr
3La (BO
3)
3Crystal.Measure through electronic probe that the Nd ionic concn is 1.238 * 10 in the crystal
20Cm
-3
Claims (4)
1. neodymium-doped lanthanum strontium laser crystals, it is characterized in that: this crystalline molecular formula is Nd
3+: Sr
3La (BO
3)
3, belonging to rhombic system, spacer is Pnma, unit cell parameters is a=7.46 , b=8.91 , c=16.54 , V=1100
3, Z=4, density 3.5g/cm
3, specific refractory power 1.78.
2. laser crystals as claimed in claim 1 is characterized in that: Nd
3+Ion replaces the case of lanthanum ion in the crystal as dopant ion, and its doping content is 0.05at-10at%.
3. the preparation method of the laser crystals of a claim 1, it is characterized in that: this crystal by adopting Czochralski grown, growth temperature are at 1340 ℃, and the crystal rotating speed is 10-15 rev/min, pull rate be the 0.5-1.0 millimeter/hour.
4. the purposes of the described laser crystals of claim 1 is characterized in that: with the solid statelaser that this crystal is made, use photoflash lamp or laser diode as pumping source, excite the laser output that produces the 1060nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031456847A CN1318659C (en) | 2003-07-10 | 2003-07-10 | Neodymium-doped strontium-lanthanum borate ( Sr3La(BO3)3 ) laser crystal and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031456847A CN1318659C (en) | 2003-07-10 | 2003-07-10 | Neodymium-doped strontium-lanthanum borate ( Sr3La(BO3)3 ) laser crystal and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1566415A CN1566415A (en) | 2005-01-19 |
| CN1318659C true CN1318659C (en) | 2007-05-30 |
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|---|---|---|---|
| CNB031456847A Expired - Fee Related CN1318659C (en) | 2003-07-10 | 2003-07-10 | Neodymium-doped strontium-lanthanum borate ( Sr3La(BO3)3 ) laser crystal and its preparation method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074887A (en) * | 2010-01-13 | 2011-05-25 | 山东大学 | Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal |
| CN107033900A (en) * | 2017-05-27 | 2017-08-11 | 陕西科技大学 | Three boric acid lanthanum-strontium base green light fluorescent powders of a kind of europium doping and preparation method thereof |
| CN107033899A (en) * | 2017-05-27 | 2017-08-11 | 陕西科技大学 | A kind of boric acid lanthanum-strontium base red light fluorescent powder of samarium doping three and preparation method thereof |
| CN107011903A (en) * | 2017-05-27 | 2017-08-04 | 陕西科技大学 | Three boric acid lanthanum-strontium base blue light fluorescent powders of a kind of thulium doping and preparation method thereof |
| CN110725003A (en) * | 2019-11-28 | 2020-01-24 | 中国工程物理研究院化工材料研究所 | Ytterbium-doped strontium gadolinium lanthanum borate laser crystal and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250115A (en) * | 1998-10-05 | 2000-04-12 | 中国科学院福建物质结构研究所 | Self-frequency doubling laser crystal of Nd-doped low temperature phase lanthanum-scandium borate |
-
2003
- 2003-07-10 CN CNB031456847A patent/CN1318659C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250115A (en) * | 1998-10-05 | 2000-04-12 | 中国科学院福建物质结构研究所 | Self-frequency doubling laser crystal of Nd-doped low temperature phase lanthanum-scandium borate |
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