CN101457398A - Ytterbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof - Google Patents
Ytterbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof Download PDFInfo
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- CN101457398A CN101457398A CNA2007100099750A CN200710009975A CN101457398A CN 101457398 A CN101457398 A CN 101457398A CN A2007100099750 A CNA2007100099750 A CN A2007100099750A CN 200710009975 A CN200710009975 A CN 200710009975A CN 101457398 A CN101457398 A CN 101457398A
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- crystal
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- sodium ion
- ion
- doped strontium
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Abstract
The invention discloses a double-doped ytterbium and sodium-ion strontium molybdate laser crystal and a preparation method thereof, and relates to the artificial crystal field. A crystal pulling method is adopted to grow a Na<+>/Yb<3+>: SrMoO4 crystal with high optical quality and larger size at the growth temperature of 1200 DEG C, the crystal rotating speed of 10-30rpm and the pulling rate of 0.1-0.5mm/h. The crystal belongs to a tetragonal system, and a space group thereof is I4(1)/a. Spectral analysis proves that the crystal has wide absorption linewidth and emission linewidth, is suitable for pumping by a laser diode (LD), and can be taken as a tunable and femtosecond pulse laser crystal to produce laser output with the wavelength of about 1020nm.
Description
Technical field
The invention belongs 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
Laser crystals is the operation material of solid statelaser, and it is meant with the crystal to be matrix, by discrete luminescence center absorptive pumping luminous energy and be translated into the luminescent material of laser output.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, found hundreds of laser crystalss, but because of a variety of causes, 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 unwell to the shortcoming of carrying out pumping with LD, and the LD pumping will be the developing direction of laser pumping source from now on.
All actively seek various physics, chemical property and mechanical property excellence both at home and abroad at present, and be easy to the high-quality laser crystal material that grows high optical quality, large size and be suitable for the LD pumping.Yb
3+Be the simplest active ions of level structure, a ground state is only arranged
2F
7/2With an excited state
2F
5/2, both energy bites are about 10000cm
-1, under the crystal field effect, energy level produces Stark splitting, forms the laser operating mechanism of quasi-three-level.Yb
3+Absorption band can effectively be coupled with lnGaAs LD pumping source, and line-width (FWHM) is wide in 900-1100nm wavelength region, need not the pumping wavelength that strict temperature is controlled the LD pumping source that can obtain to mate.Yb
3+The quantum defective low, pumping wavelength and laser output wavelength are very approaching, so its intrinsic quantum yield height, can reach 90% in theory, high quantum yield also makes the thermal load in the material lower, only for mixing Nd
3+About 1/3rd of laserable material of the same race.In addition, Yb
3+There is not excited state absorption in addition, goes up conversion and characteristics such as cross relaxation, fluorescence lifetime length.Yb
3+Make the Yb of LD pumping as these characteristics of dopant ion
3+Laser apparatus obviously is better than Nd on some is used
3+Laser apparatus.
Summary of the invention
The objective of the invention is to develop a kind of suitable use LD pumping, new laser crystals Na
+/ Yb
3+: SrMoO
4This crystal belongs to tetragonal system, has I
4 (1)/aThe spacer structure.Yb wherein
3+Be as the laser active ion, replace Ca
2+Crystallographic site, Na
+As the valence state counterion, replace Ca
2+Crystallographic site, keep the electric neutrality of structure.We have found with Czochralski grown Na through experiment
+/ Yb
3+: SrMoO
4The comparatively ideal growth conditions of crystalline, and grown high-quality, large size Na
+/ Yb
3+: SrMoO
4Crystal (seeing embodiment).
Concrete chemical equation is as follows:
0.5xNa
2CO
3+(1-2x)SrCO
3+0.5xYb
2O
3+MoO
3＝Na
xYb
xSr
1-2xMoO
4
+(1-1.5x)CO
2↑
Raw materials usedly be:
| The medicine name | Purity | Producer |
| Yb 2O 3 | 99.999％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| SrCO 3 | 99.99％ | Shanghai nasal mucus connection chemical industry company limited |
| Na 2CO 3 | 99.99％ | Shanghai the May 4th chemical reagent factory |
| MoO 3 | 99.99％ | Shanghai chemical reagents corporation of Chinese Medicine group |
Claim sample, mixing, compressing tablet, sintering, Yb with reactant
2O
3Then pressing desired concn adds.In Platinum crucible, oxygen-enriched atmosphere (air) pulling growth down goes out crystal, and the parameter of crystal growth is about 1200 ℃ of growth temperatures, and pull rate is 0.1～0.5 millimeter/hour, and the crystal rotating speed is 10～30 rev/mins.
With the Na that grows
+/ Yb
3+: SrMoO
4Crystal has carried out the collection of diffraction data on four-circle diffractometer, structural analysis shows that it belongs to tetragonal system, and spacer is I
4 (1)/a, unit cell parameters is
D
c=4.86g/cm
3, Yb
3+Ion is as the laser active ion, its doping content between 8at.-15at.%, Na
+Ion is as the valence state counterion, and its doping content is between 8at.-15at.%.
With the Na that grows
+/ Yb
3+: SrMoO
4Crystal carries out the analytical test of polarization absorption spectrum, fluorescence spectrum and fluorescence lifetime etc., and the result shows: mix 11.59at.%Yb
3+Ionic Na
+/ Yb
3+: SrMoO
4Crystalline master absorption peak is at the 976nm place, absorption cross 1.71 * 10
-20Cm
2, line-width (FWHM) is 71nm.In addition, it has strong fluorescence emission peak near wavelength 1020nm, and the emission transition cross section is 1.22 * 10 at the 1022nm place
-20Cm
2, emission live width (FWHM) is 44nm.Fluorescence lifetime is 878us.Because Na
+/ Yb
3+: SrMoO
4Have very wide absorption and emission live width, it is suitable for the LD pumping, can be used as tunable and femtosecond pulsed laser crystal.In addition, Na
+Ion is realized Yb by way of compensation
3+At SrMoO
4In high-concentration dopant, doping content can reach 11.59at.%.High Yb
3+Doping content is suitable for as the gain media in the micro-slice laser it.Na
+/ Yb
3+: SrMoO
4Crystal can go out superior in quality crystal with Czochralski grown, and the speed of growth is very fast, is a kind of laser crystals that actual application prospect and use value are arranged.
Embodiment
Embodiment: the Czochralski grown doping content is 11.59at.%Yb
3+Na
+/ Yb
3+: SrMoO
4Laser crystals.
Na in molar ratio
2CO
3: SrCO
3: MoO
3: Yb
2O
3The accurate load weighted Na of=1:2:6:1
2CO
3, Yb
2O
3, SrCO
3, MoO
3Mixed grinding is even, behind the compressing tablet, puts into Φ 80 * 80mm
3Corundum crucible in, in retort furnace in 600 ℃ of solid state reactions 24 hours; After the taking-up, grind compressing tablet again and be warming up to 700 ℃ of reactions 24 hours again.Synthetic good above sample is put into Φ 56 * 41mm
3Platinum crucible in, pulling crystal in air atmosphere, growth temperature is 1200 ℃, the crystal rotating speed is 30 rev/mins, pulling rate is under 0.5 millimeter/hour the situation, to have grown and be of a size of Φ 20 * 35mm
3High-quality Na
+/ Yb
3+: SrMoO
4Crystal.Yb in ICP test shows crystal
3+Ion content is 11.59at.%.
Claims (3)
1. Ytterbium sodium ion double doped strontium molybdate laser crystal, it is characterized in that: this crystalline molecular formula is Na+/Yb
3+: SrMoO
4, belonging to tetragonal system, spacer is I
4 (1)/a, unit cell parameters is
,
,
, D
c=4.86g/cm
3, Yb
3+Ion is as the laser active ion, its doping content between 8at.-15at.%, Na
+Ion is as the valence state counterion, and its doping content is between 8at.-15at.%.
2. the preparation method of the Ytterbium sodium ion double doped strontium molybdate laser crystal of a claim 1 is characterized in that: this crystal by adopting Czochralski grown, 1200 ℃ of growth temperatures, 0.1～0.5 millimeter/hour of pull rate, 10～30 rev/mins of crystal rotating speeds.
3. the purposes of the Ytterbium sodium ion double doped strontium molybdate laser crystal of a claim 1, it is characterized in that: this crystal is used for solid statelaser as working-laser material, produces the laser output of 1020nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100099750A CN101457398B (en) | 2007-12-11 | 2007-12-11 | Ytterbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100099750A CN101457398B (en) | 2007-12-11 | 2007-12-11 | Ytterbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101457398A true CN101457398A (en) | 2009-06-17 |
| CN101457398B CN101457398B (en) | 2012-08-22 |
Family
ID=40768509
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100099750A Expired - Fee Related CN101457398B (en) | 2007-12-11 | 2007-12-11 | Ytterbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof |
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| Country | Link |
|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060349A1 (en) * | 2008-11-25 | 2010-06-03 | Liu Chaoxuan | High-frequency coil pulling holes arrangement for producing multiple silicon cores |
| CN105780115A (en) * | 2016-04-14 | 2016-07-20 | 中国科学院福建物质结构研究所 | Laser crystal doped with rare earth activation ion zinc lanthanum borate and preparation method and application thereof |
| CN107723796A (en) * | 2017-10-23 | 2018-02-23 | 福州大学 | A kind of method for being used to grow molybdic acid strontium crystal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215204C (en) * | 2001-11-23 | 2005-08-17 | 中国科学院福建物质结构研究所 | Chromium-doped lanthanum scandium borate tunable laser crystal |
| CN100395380C (en) * | 2006-04-21 | 2008-06-18 | 北京工业大学 | Process for preparing barium tungstate single crystal with improved doping concentration of rare earth ion |
-
2007
- 2007-12-11 CN CN2007100099750A patent/CN101457398B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060349A1 (en) * | 2008-11-25 | 2010-06-03 | Liu Chaoxuan | High-frequency coil pulling holes arrangement for producing multiple silicon cores |
| CN105780115A (en) * | 2016-04-14 | 2016-07-20 | 中国科学院福建物质结构研究所 | Laser crystal doped with rare earth activation ion zinc lanthanum borate and preparation method and application thereof |
| CN107723796A (en) * | 2017-10-23 | 2018-02-23 | 福州大学 | A kind of method for being used to grow molybdic acid strontium crystal |
| CN107723796B (en) * | 2017-10-23 | 2019-05-10 | 福州大学 | A method of for growing molybdic acid strontium crystal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101457398B (en) | 2012-08-22 |
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