CN1848562A - Laser crystal doping neodymium lanthanum potassium molybdate - Google Patents
Laser crystal doping neodymium lanthanum potassium molybdate Download PDFInfo
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- CN1848562A CN1848562A CN 200510065443 CN200510065443A CN1848562A CN 1848562 A CN1848562 A CN 1848562A CN 200510065443 CN200510065443 CN 200510065443 CN 200510065443 A CN200510065443 A CN 200510065443A CN 1848562 A CN1848562 A CN 1848562A
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- potassium molybdate
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Abstract
A Nb3+ : KLa( MoOx)2 crystal with crystal cell parameter of a= 5.445 A and b=5.445A as well as c=12.208A, density of 5.45g / cu.cm and refractive index of about 2.0 can be formed by Czochralski method under condition as growing temperature of 1070 deg.c, crystal rotation speed of 5-20 rpm and pulling rate of 0.5-2mm / hour. The prepared crystal can generate laser output through LD pump and can generate green and blue laser output through multi-frequency.
Description
Technical field
Neodymium-doped kalium-lanthanum molybdate laser crystal and its production and use, 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
The blue wave band of laser value that has a wide range of applications in fields such as high density data storage, seabed communication, large scale display, detection, life science and laser medicines, the wavelength of present business-like solid state laser mainly concentrates on near-infrared and infrared band, desire obtains blue light output in solid state laser, mainly by following three kinds of methods: 1, utilize the semi-conducting material manufacturing of broad stopband directly to export the semiconductor laser of blue light.2, utilize the nonlinear frequency transformation technology that Solid State Laser is carried out frequency inverted.3, switch technology obtains blue laser output in the utilization.Wherein utilize nonlinear frequency transformation Solid State Laser to be carried out the laser of frequency multiplication acquisition owing to good beam quality, the high main path that realizes the output of high power blue green laser that becomes of power output.
In the bluish-green wave band of laser, with penetration capacity the best of the 457nm blue light that is called " navy blue ", solid blue laser commonly used in the world at present mostly is the 473nm blue light that Nd:YAG 946nm laser freuqency doubling produces, the also long 16nm of this wavelength ratio 457nm.
M ' M " (MoO
4)
2(M '=alkali metal; " Gd) series compound is the attractive very early laser host crystalline material of a class to M for=La, Y, and it has scheelite-type structure (CaWO
4Type), " unite and substitute two Ca because M ' and M
2+Ion is in the random distribution of cation position, caused structural unorderedly, makes the residing case of the active ions that mix produce distortion, and this disordered structure will make the band broadening of active ions, and this will help adopting LD that it is carried out pumping.Verified this compounds doping with rare-earth ions of the research in past is as mixing Nd
3+, Ho
3+And Er
3+Can become laser host material, we find that the kalium-lanthanum molybdate crystal of neodymium-doped in this compounds has relatively more outstanding spectrum property in research process.
Summary of the invention
Purpose of the present invention just is to develop a kind of new laser crystal Nd
3+: KLa (MoO
4)
2, it can directly use photoflash lamp and LD pumping, realizes the laser crystal material of 450nm blue laser output by frequency multiplication.Nd
3+: KLa (MoO
4)
2Crystal belongs to tetragonal crystal system, has I4 (1)/a (C
4h 6) the space group structure.Wherein neodymium ion is as dopant ion, replace the lattice position of lanthanum ion, the doping content of neodymium is at 0.5at.%～15at.%, and fluorescence lifetime (τ) is 0.1～0.2ms, its fluorescence lifetime is the function of neodymium ion concentration, can mix the neodymium ion of variable concentrations according to different needs.Spectrum calculates and shows that this crystal has the absworption peak of the last one at the 804nm place, and absorption coefficient is 7.5cm
-1, half-peak breadth 12.00nm, absorption cross-section 2.85 * 10
-20Cm
2In addition, it has strong fluorescence emission peak at wavelength 1061nm, and the emission transition cross section is 2.0 * 10
-19Cm
2, half-peak breadth 20nm.This crystal is a kind of novel laser crystal, and can produce wavelength is the laser output of 1061nm, at wavelength 900nm strong fluorescence emission peak is arranged also, and the emission transition cross section is 5.1 * 10
-20Cm
2, half-peak breadth 38nm.
Nd
3+: KLa (MoO
4)
2The blue laser output that crystal might produce 450nm by the frequency multiplication means in the stronger emission of 900nm.This wavelength only differs 7nm apart from 457nm, adds Nd
3+: KLa (MoO
4)
2Crystal can reach 38nm in the half-peak breadth at 900nm place, to a certain degree tuning arranged, thereby it can cover 457nm.Aspect output wavelength, Nd
3+: KLa (MoO
4)
2Crystal has more advantage than NYAG.From spectroscopic data aspect, Nd
3+: KLa (MoO
4)
2Crystal and NYAG are suitable.This crystal can obtain the navy blue laser output of stronger 450nm by adopting the frequency multiplication means, and also has tunable in the certain limit.
Nd
3+: KLa (MoO
4)
2Crystal is a kind of compound of congruent melting, can adopt Czochralski grown, presses chemical equation:
Ratio claim sample, mixing, compressing tablet, and Nd
2O
3Then pressing desired concn adds.Raw materials usedly be:
| The medicine name | Purity | Producer |
| Nd 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 in Platinum crucible, carries out under inertia, neutrality or oxygen rich gas atmosphere, can grow high-quality Nd
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 Nd that grows
3+: KLa (MoO
4)
2Crystal has carried out the collection of diffraction data on four-circle diffractometer, 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 Nd 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: mix 4.1at.%Nd
3+The Nd of ion
3+: KLa (MoO
4)
2The main absworption peak of crystal is at 804nm, and its half-peak breadth is 12nm, is very suitable for adopting the GaAlAs semiconductor laser to carry out pumping in the bigger half-peak breadth in 804nm place, helps the absorption of laser crystal to pump light, improves pumping efficiency.It has the emission band of three non-constant widths at 850nm～1400nm wave band, wherein peak center is 14nm in the half-peak breadth (FWHM) of 1061nm place emission peak, fluorescence lifetime is 0.164ms, because the crystal that fluorescence lifetime is long can accumulate more particle at last energy level, increase energy storage, helped the raising of device power output and output energy.At wavelength 900nm strong fluorescence emission peak is arranged also, the emission transition cross section is 5.1 * 10
-20Cm
2, half-peak breadth 38nm.Can produce the output of 450nm blue laser by frequency multiplication.The solid state laser made from this crystal can be used in the numerous areas such as spectroscopy, biomedicine, military affairs.
Nd
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 1.06 and 0.9 μ m, can produce green and the blue laser output of 530.5nm and 450nm by frequency multiplication.This crystal can be used as a kind of laser crystal preferably.
Embodiment
Realize that experiment optimal way of the present invention is as follows:
Embodiment 1. Czochralski grown doping contents are 1.0at.%Nd
3+KLa (MoO
4)
2Laser crystal
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Nd
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 Nd
3+Content is the Nd of 1.0at.%
3+: KLa (MoO
4)
2Crystal.
Embodiment 2: the Czochralski grown doping content is 9.0at.%Nd
3+KLa (MoO
4)
2, laser crystal
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Nd
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 Nd
3+Content is the Nd of 9.0at.%
3+: KLa (MoO
4)
2Crystal.
Embodiment 3: the Czochralski grown doping content is 4.0at.%Nd
3+KLa (MoO
4)
2Laser crystal
Will be by the load weighted K of proportion speed
2CO
3, La
2O
3, MoO
3, Nd
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 Nd
3+Content is the Nd of 4.0at.%
3+: KLa (MoO
4)
2Crystal.
Claims (4)
1. laser crystal doping neodymium lanthanum potassium molybdate, it is characterized in that: the molecular formula of this crystal is Nd
3+: KLa (MoO
4)
2, belonging to tetragonal crystal system, 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, D
c=5.45g/cm
3, refractive index 2.0.
2. neodymium-doped kalium-lanthanum molybdate laser crystal as claimed in claim 1 is characterized in that: in this crystal, and Nd
3+Ion replaces La in the crystal as dopant ion
3+The lattice position of ion, its doping content are 0.05at～15at%.
3. the preparation method of the laser crystal doping neodymium lanthanum potassium molybdate of a claim 1 is characterized in that: this crystal by adopting Czochralski grown, and with K
2CO
3, La
2O
3And MoO
3Be raw material, press chemical equation:
Ratio claim sample, mixing, compressing tablet, and Nd
2O
3Then pressing desired concn adds; In Platinum crucible, pulling growth goes out crystal under inertia, neutrality or the 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 laser crystal doping neodymium lanthanum potassium molybdate of a claim 1, it is characterized in that: this crystal is used for the solid state laser of spectroscopy, biomedicine, military field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510065443XA CN100550542C (en) | 2005-04-05 | 2005-04-05 | A kind of laser crystal doping neodymium lanthanum potassium molybdate |
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|---|---|---|---|
| CNB200510065443XA CN100550542C (en) | 2005-04-05 | 2005-04-05 | A kind of laser crystal doping neodymium lanthanum potassium molybdate |
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|---|---|
| CN1848562A true CN1848562A (en) | 2006-10-18 |
| CN100550542C CN100550542C (en) | 2009-10-14 |
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ID=37077998
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|---|---|---|---|
| CNB200510065443XA Expired - Fee Related CN100550542C (en) | 2005-04-05 | 2005-04-05 | A kind of laser crystal doping neodymium lanthanum potassium molybdate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378173B (en) * | 2007-08-30 | 2012-07-18 | 中国科学院福建物质结构研究所 | Chromium-doped molybdic acid aluminum rubidium tunable laser crystal, and preparation method and application thereof |
| CN101377016B (en) * | 2007-08-30 | 2012-08-22 | 中国科学院福建物质结构研究所 | Calcium molybdate laser crystal doped with ytterbium ion and sodium ion and preparing method thereof |
| CN102747423A (en) * | 2012-07-19 | 2012-10-24 | 中国科学院福建物质结构研究所 | Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and method for preparing same |
| CN111763987A (en) * | 2020-07-06 | 2020-10-13 | 暨南大学 | Tm (Tm)3+Self-activated laser crystal and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237817A (en) * | 1998-05-28 | 1999-12-08 | 中国科学院福建物质结构研究所 | Blue laser |
| US6514336B1 (en) * | 2000-10-12 | 2003-02-04 | Utar Scientific, Inc. | Method of growing piezoelectric lanthanide gallium crystals |
| 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 |
| CN1260862C (en) * | 2002-05-31 | 2006-06-21 | 中国科学院福建物质结构研究所 | Laser crystal NdA3 (BO3)4 used for generating blue-violet coloured laser |
-
2005
- 2005-04-05 CN CNB200510065443XA patent/CN100550542C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378173B (en) * | 2007-08-30 | 2012-07-18 | 中国科学院福建物质结构研究所 | Chromium-doped molybdic acid aluminum rubidium tunable laser crystal, and preparation method and application thereof |
| CN101377016B (en) * | 2007-08-30 | 2012-08-22 | 中国科学院福建物质结构研究所 | Calcium molybdate laser crystal doped with ytterbium ion and sodium ion and preparing method thereof |
| CN102747423A (en) * | 2012-07-19 | 2012-10-24 | 中国科学院福建物质结构研究所 | Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and method for preparing same |
| CN111763987A (en) * | 2020-07-06 | 2020-10-13 | 暨南大学 | Tm (Tm)3+Self-activated laser crystal and preparation method thereof |
| CN111763987B (en) * | 2020-07-06 | 2022-05-10 | 暨南大学 | Tm (Tm)3+Self-activated laser crystal and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100550542C (en) | 2009-10-14 |
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Assignee: Brilliant nine Science and Technology Ltd.s in Chengdu Assignor: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Scie Contract record no.: 2011350000031 Denomination of invention: Laser crystal doping neodymium lanthanum potassium molybdate Granted publication date: 20091014 License type: Exclusive License Open date: 20061018 Record date: 20110318 |
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Granted publication date: 20091014 Termination date: 20140405 |