CN1966780A - Neodymium-doped sodium-yttrium molybdenate laser crystal and its preparation method and use - Google Patents
Neodymium-doped sodium-yttrium molybdenate laser crystal and its preparation method and use Download PDFInfo
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- CN1966780A CN1966780A CN 200510119538 CN200510119538A CN1966780A CN 1966780 A CN1966780 A CN 1966780A CN 200510119538 CN200510119538 CN 200510119538 CN 200510119538 A CN200510119538 A CN 200510119538A CN 1966780 A CN1966780 A CN 1966780A
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Abstract
Neodymium-doped molybdenic acid yttrium natrium laser crystal and its preparation method, application relates to artificial lens field. The method contains growing high quality and large-scaled Nd3+:NaY(MoO4)2 crystal with crystal pulling method at about 1140DEG C, a rotary speed of 10-30rpm, a withdrawal rate of 0.5-1mm/h. The crystal can generate laser output with a wave length of 1060nm. Crystal laser made from the crystal can be used in spectroscopy, biomedicine and military affairs.
Description
Technical field
The present invention relates to the artificial crystal growth field.
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.Neodymium ion is used as active ions widely owing to have spectrum property preferably.Neodymium-doped sodium-yttrium molybdenate laser crystal and its production and use, the purpose of its invention just are to develop a kind of new laser crystals, can directly use photoflash lamp and LD pumping, have the crystalline material that higher conversion efficiency can be launched 1060nm laser.
Summary of the invention
Purpose of the present invention just is to develop a kind of new laser crystals Nd
3+: NaY (MoO
4)
2, can directly use photoflash lamp and LD pumping, laser crystal material with higher conversion efficiency.Nd
3+: NaY (MoO
4)
2Crystal belongs to tetragonal system, has I
4 (1)/aThe spacer structure.Wherein neodymium ion is as dopant ion, replace the crystallographic site of ruthenium ion, the doping content of neodymium is between 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 different concns according to different needs.Experimental result shows the laser of its exportable 1060nm wavelength around, can be used as laser crystals.
Nd
3+: NaY (MoO
4)
2Crystal is a kind of compound of congruent melting, adopts Czochralski grown to go out, and presses chemical equation:
Ratio claim sample, mixing, compressing tablet, sintering, 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 |
| Y 2O 3 | 99.999％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| Na 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 the oxygen-enriched atmosphere (as air etc.), the parameter of crystal growth is about 1140 ℃ of growth temperatures, pulling speed is 0.5～1.0 millimeter/hour, and 10～30 rev/mins of crystal rotating speeds have grown high-quality Nd
3+: NaY (MoO
4)
2Crystal.
With the Nd that grows
3+: NaY (MoO
4)
2Crystal 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 a=b=5.20 , c=11.33 , V=306
3, D
c=4.69g/cm
3
With the Nd that grows
3+: NaY (MoO
4)
2Crystal carries out the analytical test of absorption spectrum, fluorescence spectrum and fluorescence lifetime etc., and the result shows: mix 1.0at.%Nd
3+Ionic Nd
3+: NaY (MoO
4)
2Crystalline master absorption peak is at the 805nm place, and its uptake factor is 3.78cm
-1, peak width at half height (FWHM) is 10nm, absorption cross 5.92 * 10
-20Cm
2, this crystal is suitable for adopting the AsGaAl semiconductor laser to come pumping in the bigger peak width at half height in 805nm place, helps the absorption of laser crystals to pump light, improves pumping efficiency.In addition, it has strong fluorescence emission peak at wavelength 1060nm place, emission transition cross section 1.49 * 10
-20Cm
2, peak width at half height is 12.6nm, fluorescence lifetime is 108 μ s, because the long crystal of fluorescence lifetime can accumulate more particle at last energy level, has increased energy storage, helps the raising of device output rating and output energy.Therefore, Nd
3+: NaY (MoO
4)
2Crystal can obtain the output of more powerful laser, is a kind of high conversion efficiency, low cost, high optical quality and actual application prospect is arranged and the laser crystals of use value.
Nd
3+: NaY (MoO
4)
2Crystal can grow superior in quality crystal, fast growth easily with crystal pulling method; The crystalline Vickers' hardness is 314VDH, and hardness is moderate, is convenient to processing; 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 1060nm, and this crystal can be used as a kind of laser crystals preferably.
Embodiment
Embodiment 1: the Czochralski grown doping content is 1.0at.%Nd
3+Nd
3+: NaY (MoO
4)
2Laser crystals.
Will be by the load weighted Na of proportion speed
2CO
3, Y
2O
3, MoO
3, Nd
2O
3Mixed grinding is even, behind the compressing tablet, puts into Ф 80 * 80mm
3Corundum crucible in, in retort furnace in 650 ℃ of solid state reactions 24 hours; After the taking-up, grind compressing tablet again and be warming up to 850 ℃ of reactions 24 hours again.Synthetic good above sample is put into Ф 50 * 40mm
3Platinum crucible in, adopt crystal pulling method, in air atmosphere, growth temperature is 1140 ℃, the crystal rotating speed is 30 rev/mins, pulling rate is under 1 millimeter/hour the situation, to have grown and be of a size of Ф 24 * 40mm
3High-quality Nd
3+: NaY (MoO
4)
2Crystal.Nd in ICP test shows crystal
3+Ion content is 1at.%.
Claims (4)
1. neodymium-doped sodium-yttrium molybdenate laser crystal, it is characterized in that: this crystalline molecular formula is Nd
3+: NaY (MoO
4)
2, the doping content of neodymium ion belongs to tetragonal system between 0.5at.%～15at.%, and spacer is I
4 (1)/a, unit cell parameters is a=b=5.20 , c=11.33 , V=306
3, D
c=4.69g/cm
3
2. the preparation method of the neodymium-doped sodium-yttrium molybdenate laser crystal of a claim 1 is characterized in that: this crystal by adopting Czochralski grown.
3. the preparation method of neodymium-doped sodium-yttrium molybdenate laser crystal as claimed in claim 2, it is characterized in that: in this method, the parameter of crystal growth is about 1140 ℃ of growth temperatures, and pulling speed is 0.5～1.0 millimeter/hour, and the crystal rotating speed is 10～30 rev/mins.
4. the purposes of the neodymium-doped sodium-yttrium molybdenate laser crystal of a claim 1, it is characterized in that: this crystal is used for solid statelaser as working-laser material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510119538 CN1966780A (en) | 2005-11-14 | 2005-11-14 | Neodymium-doped sodium-yttrium molybdenate laser crystal and its preparation method and use |
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|---|---|---|---|
| CN 200510119538 CN1966780A (en) | 2005-11-14 | 2005-11-14 | Neodymium-doped sodium-yttrium molybdenate laser crystal and its preparation method and use |
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|---|---|
| CN1966780A true CN1966780A (en) | 2007-05-23 |
Family
ID=38075750
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|---|---|---|---|
| CN 200510119538 Pending CN1966780A (en) | 2005-11-14 | 2005-11-14 | Neodymium-doped sodium-yttrium molybdenate laser crystal and its preparation method and use |
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Cited By (3)
| 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 |
| CN101457400B (en) * | 2007-12-11 | 2012-09-05 | 中国科学院福建物质结构研究所 | Method for preparing neodymium doped Na2La4(MoO4)7 laser crystal |
-
2005
- 2005-11-14 CN CN 200510119538 patent/CN1966780A/en active Pending
Cited By (3)
| 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 |
| CN101457400B (en) * | 2007-12-11 | 2012-09-05 | 中国科学院福建物质结构研究所 | Method for preparing neodymium doped Na2La4(MoO4)7 laser crystal |
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Open date: 20070523 |