CN101212121A - Ytterbium doped kalium-lanthanum molybdate laser crystal, producing method, and purpose - Google Patents
Ytterbium doped kalium-lanthanum molybdate laser crystal, producing method, and purpose Download PDFInfo
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- CN101212121A CN101212121A CNA200610135381XA CN200610135381A CN101212121A CN 101212121 A CN101212121 A CN 101212121A CN A200610135381X A CNA200610135381X A CN A200610135381XA CN 200610135381 A CN200610135381 A CN 200610135381A CN 101212121 A CN101212121 A CN 101212121A
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Abstract
A laser crystal mixed with the ytterbium doped lanthanum potassium molybdate and the preparation method as well as the use thereof relate to the field of the intraocular lens.At a temperature of about 1070 DEG C, the invention, at a crystal rotation speed of 5 to 20 rotations per minute and a pulling rate of 0.5 to 2mm per hour, grows the crystal of Yb<3>:KLa(MoO4)2 of high quality and larger dimension through the czochralski method. The crystal is a novel laser crystal, which can generate a laser output with a wavelength of about 1 Mum. A solid laser made from the crystal can be applied in the fields such as spectroscopy, biomedicine, military science and etc.
Description
Technical field
It relates to artificial lens and field of crystal growth in the technical field of optoelectronic functional materials, especially relates to a kind of laser crystal material as the operation material in the solid-state laser.
Background technology
Laser crystal is the operation material of solid state laser, and it is meant with the crystal to be matrix, by discrete luminescence center absorptive pumping light energy and be translated into the luminescent material of laser output.Solid laser working substance is made up of host material and active ions, and its various physics and chemical property are mainly by the host material decision, and its spectral characteristic and fluorescence lifetime etc. are then determined by the level structure of active ions.From nineteen sixty, succeeded in developing since the synthetic ruby pulse laser, up to now, found hundreds of laser crystals, but because of a variety of causes, the laser crystal that can really obtain practical application has only ten to plant.
At present, most widely used laser crystal is yttrium-aluminium-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 absorption line, 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 performance excellence both at home and abroad at present, and be easy to the high-quality laser crystal material that grows high optical quality, large scale and be suitable for the LD pumping.Ytterbium ion is the simplest ion of level structure, and it absorbs bandwidth and effectively is coupled with InGaAs LD pumping source, is fit to very much the LD pumping.Than neodymium ion, ytterbium ion has many good qualities, and as not having excited state absorption and last conversion, has high fluorescence lifetime and light conversion efficiency or the like.Therefore, ytterbium ion becomes the choosing of the hot topic of laser crystal active ions in recent years.
Summary of the invention
Purpose of the present invention just is to develop a kind of new laser crystal Yb
3+: KLa (MoO
4)
2, can directly use photoflash lamp and LD pumping, laser crystal material with higher conversion efficiency.
Yb
3+: KLa (MoO
4)
2Crystal belongs to tetragonal crystal system, and space group is I4 (1)/a (C
4h 6).Wherein ytterbium ion is as dopant ion, replace the lattice position of lanthanum ion, the doping content of ytterbium is between 0.05at.%～5at.%, and fluorescence lifetime (τ) is 0.4～1.0ms, its fluorescence lifetime is the function of ytterbium ion concentration, can mix the ytterbium ion of variable concentrations according to different needs.Experimental result shows the laser of its exportable 1 μ m wavelength around, can be used as laser crystal.Yb
3+: KLa (MoO
4)
2Crystal is a kind of compound of congruent melting, adopts Czochralski grown to go out, and presses chemical equation: K
2CO
3+ La
2O
3+ 4MoO
3==2KLa (MoO
4)
2+ CO
2Ratio claim sample, mixing, compressing tablet, and Yb
2O
3Then pressing desired concn adds.Raw materials usedly be:
| The medicine name | Purity | Producer |
| Yb 2O 3 | 99.999％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| La 2O 3 | 99.999％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| K 2CO 3 | 99.99％ | Shanghai the May 4th chemical reagent factory |
| MoO 3 | 99.99％ | Shanghai chemical reagents corporation of Chinese Medicine group |
Its main growth conditions is as follows: growth is to carry out in platinum crucible, under inertia, neutrality or the oxygen rich gas atmosphere, has grown high-quality Yb
3+: KLa (MoO
4)
2Crystal, the parameter of its growth are about 1070 ℃ of growth temperatures, and hoisting velocity is 0.5～2.0 millimeter/hour, 5～20 rev/mins of crystal rotating speeds.
With the Yb that grows
3+: KLa (MoO
4)
2Crystal, it has carried out the collection of diffraction data on four-circle diffractometer, and structural analysis shows that it belongs to tetragonal crystal system, and space group is I4 (1)/a (C
4h 6), cell parameter is a=5.445
, b=5.445
, c=12.208
, V=362.07
3, density 5.45g/cm
3
With the Yb that grows
3+: KLa (MoO
4)
2Crystal carries out the analytical test of absorption spectrum, fluorescence spectrum and fluorescence lifetime etc., and the result shows: the ytterbium ion doping content is the Yb of 0.4at.%
3+: KLa (MoO
4)
2The main absworption peak of crystal is at 978nm, and its half-peak breadth is 10nm, and the absorptive transition cross section is 2.21 * 10
-19Cm
2, be suitable for adopting the InGaAs semiconductor laser to carry out pumping, help the absorption of laser crystal to pump light, improve pumping efficiency; The emission band that a non-constant width is arranged at the 900nm-1150nm place, wherein the emission transition cross section of emission peak 1010nm is 4.82 * 10
-21Cm
2, fluorescence lifetime is 0.44ms, the crystal that fluorescence lifetime is long can accumulate more particle at last energy level, has increased energy storage, helps the raising of device power output and output energy.Therefore, Yb
3+: KLa (MoO
4)
2Crystal can obtain bigger output, is a kind of high conversion efficiency, low cost, high optical quality and actual application prospect is arranged and the laser crystal of use value.
Yb
3+: KLa (MoO
4)
2Crystal can grow superior in quality crystal easily with czochralski method, fast growth, the crystal quality is hard, has good heat-conducting, good optical characteristics is arranged, be easy to obtain laser output with flash lamp pumping and LD pumping, laser output wavelength is about 1 μ m, and this crystal can be used as a kind of laser crystal preferably.
Embodiment
Embodiment 1: the Czochralski grown doping content is 0.5at.%Yb
3+KLa (MoO
4)
2Laser crystal.
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Yb
2O
3Mixed grinding is even, behind the compressing tablet, puts into φ 60 * 40mm
3Platinum crucible in, in Muffle furnace in 700 ℃ of solid phase reactions 24 hours; After the taking-up, grind compressing tablet again and be warming up to 800 ℃ of reactions 48 hours again.Synthetic good above sample is put into platinum crucible, adopt czochralski method, in nitrogen atmosphere, growth temperature is that 1070 ℃, crystal rotating speed are 15 rev/mins, and pulling rate is under 1 millimeter/hour the situation, to have grown and be of a size of φ 20 * 35mm
3High-quality Yb
3+Content is the Yb of 0.5at.%
3+: KLa (MoO
4)
2Crystal.
Embodiment 2: the Czochralski grown doping content is 1.0at.%Yb
3+KLa (MoO
4)
2Laser crystal.
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Yb
2O
3Mixed grinding is even, behind the compressing tablet, puts into φ 60 * 40mm
3Platinum crucible in, in Muffle furnace in 700 ℃ of solid phase reactions 24 hours; After the taking-up, grind compressing tablet again and be warming up to 800 ℃ of reactions 48 hours again.Synthetic good above sample is put into platinum crucible, adopt czochralski method, in nitrogen atmosphere, growth temperature is that 1072 ℃, crystal rotating speed are 20 rev/mins, and pulling rate is under 0.8 millimeter/hour the situation, to have grown and be of a size of φ 25 * 45mm
3High-quality Yb
3+Content is the Yb of 1.0at.%
3+: KLa (MoO
4)
2Crystal.
Embodiment 3: the Czochralski grown doping content is 4.0at.%Yb
3+KLa (MoO
4)
2Laser crystal.
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Yb
2O
3Mixed grinding is even, behind the compressing tablet, puts into φ 60 * 40mm
3Platinum crucible in, in Muffle furnace in 700 ℃ of solid phase reactions 24 hours; After the taking-up, grind compressing tablet again and be warming up to 800 ℃ of reactions 48 hours again.Synthetic good above sample is put into platinum crucible, adopt czochralski method, in air atmosphere, growth temperature is that 1072 ℃, crystal rotating speed are 20 rev/mins, and pulling rate is under 1 millimeter/hour the situation, to have grown and be of a size of φ 25 * 40mm
3High-quality Yb
3+Content is the Yb of 4.0at.%
3+: KLa (MoO
4)
2Crystal.
Claims (4)
1. Ytterbium doped kalium-lanthanum molybdate laser crystal, it is characterized in that: the molecular formula of this crystal is Yb
3+: KLa (MoO
4)
2, belonging to tetragonal crystal system, space group is 14 (1)/a (C
4h 6), cell parameter is a=5.445
B=5.445
C=12.208
V=362.07
3, D
c=5.45g/cm
3, refractive index 2.0.
2. Ytterbium doped kalium-lanthanum molybdate laser crystal as claimed in claim 1 is characterized in that: in this crystal, and Yb
3+Ion replaces La in the crystal as dopant ion
3+The lattice position of ion, its doping content is between 0.05at-5at%.
3. the preparation method of the laser crystal Ytterbium doped kalium-lanthanum molybdate of a claim 1, this crystal by adopting Czochralski grown is characterized in that: with K
2CO
3, La
2O
3And MoO
3Be raw material, press chemical equation: K
2CO
3+ La
2O
3+ 2MoO
3=KLa (MoO
4)
2+ CO
2↑ ratio claim sample, mixing, compressing tablet, and Yb
2O
3Then press desired concn and add, pulling growth goes out crystal under inertia, neutrality or oxygen-enriched atmosphere, and the parameter of crystal growth is about 1070 ℃ of growth temperatures, and hoisting velocity is 0.5～2.0 millimeter/hour, and the crystal rotating speed is 5～20 rev/mins.
4. the purposes of the Ytterbium doped kalium-lanthanum molybdate laser crystal of a claim 1, it is characterized in that: this crystal is used for solid state laser as working-laser material, use photoflash lamp or laser diode as pumping source, excite the laser output that produces 1 μ m wavelength around.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610135381XA CN101212121A (en) | 2006-12-27 | 2006-12-27 | Ytterbium doped kalium-lanthanum molybdate laser crystal, producing method, and purpose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610135381XA CN101212121A (en) | 2006-12-27 | 2006-12-27 | Ytterbium doped kalium-lanthanum molybdate laser crystal, producing method, and purpose |
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| Publication Number | Publication Date |
|---|---|
| CN101212121A true CN101212121A (en) | 2008-07-02 |
Family
ID=39611878
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676445B (en) * | 2008-09-16 | 2012-08-22 | 中国科学院福建物质结构研究所 | Neodymium-doped gadolinium barium lithium tungstate laser crystal and preparation method and application thereof |
| CN102877132A (en) * | 2012-10-22 | 2013-01-16 | 中国科学院福建物质结构研究所 | Ytterbium-doped molybdic acid gadolinium barium potassium laser crystal and preparation method thereof |
| CN105463570A (en) * | 2015-12-24 | 2016-04-06 | 淮南师范学院 | Multifunctional caesium lanthanum molybdate crystal as well as preparation method and application thereof |
-
2006
- 2006-12-27 CN CNA200610135381XA patent/CN101212121A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676445B (en) * | 2008-09-16 | 2012-08-22 | 中国科学院福建物质结构研究所 | Neodymium-doped gadolinium barium lithium tungstate laser crystal and preparation method and application thereof |
| CN102877132A (en) * | 2012-10-22 | 2013-01-16 | 中国科学院福建物质结构研究所 | Ytterbium-doped molybdic acid gadolinium barium potassium laser crystal and preparation method thereof |
| CN105463570A (en) * | 2015-12-24 | 2016-04-06 | 淮南师范学院 | Multifunctional caesium lanthanum molybdate crystal as well as preparation method and application thereof |
| CN105463570B (en) * | 2015-12-24 | 2017-08-25 | 淮南师范学院 | A kind of multi-functional lanthanum molybdate caesium crystal and its production and use |
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Open date: 20080702 |