CN1566415A - 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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- CN1566415A CN1566415A CN 03145684 CN03145684A CN1566415A CN 1566415 A CN1566415 A CN 1566415A CN 03145684 CN03145684 CN 03145684 CN 03145684 A CN03145684 A CN 03145684A CN 1566415 A CN1566415 A CN 1566415A
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Abstract
The invention relates to a Neodymium-doped strontium-lanthanum borate (Sr3La(BO3)3) laser crystal and its preparation method wherein a Czochralski method is employed, the crystal is suitable for pumping with laser diode (LD), and laser ray output with 1060nm of wave length is easy to be produced. The solid-state laser made by the crystal can be applied into the fields of optical spectroscopy, biological medicine and military purpose.
Description
Technical Field
The invention relates to the field of artificial crystals and crystal growth in the technical field of photoelectron functional materials, in particular to a laser crystal material serving as a working substance in a solid-state laser.
Background
The solid laser working substance is composed of a matrix material and active ions, various physical and chemical properties of the solid laser working substance are mainly determined by the matrix material, and spectral characteristics, fluorescence lifetime and the like of the solid laser working substance are determined by the energy level structure of the active ions. Since the successful development of artificial ruby pulsed lasers in 1960, hundreds of laser crystals have been discovered so far, but most of the laser crystal materials cannot be really put into practical use due to the limitations of gain, difficulty in crystal growth, difficulty in incorporation of active ions, poor spectral properties, or poor thermal and mechanical properties. Only ten laser crystals can be really obtained for practical application.
Currently, the most widely used laser crystal is a neodymium ion doped Yttrium Aluminum Garnet (YAG) crystal, which has various better physical and chemical properties and is easy to grow high optical quality and large-size high-quality crystals. However, it has the disadvantage of narrow absorption line and is not suitable for pumping by LD, which will be the development direction of laser pumping source in future.
At present, various high-quality laser crystal materials with excellent physical and chemical properties and mechanical properties, high optical quality and large size are actively searched at home and abroad, and the crystal is suitable for LD pumping. Neodymium ions are widely used as active ions due to their superior spectral properties. The borate crystal has better physical, chemical and mechanical properties, and can easily grow high-quality single crystal, thereby becoming a popular choice for laser matrix materials. Such as crystals of YCOB, GdCOB, YAB, Sr3La(BO3)3The compound being a bisborate M3Ln(BO3)3One of (M ═ Ca, Sr, Ba, and Ln ═ La-Lu, Y) series compounds was initially obtained as a powder by solid-phase synthesis. At present, no report on crystal growth exists.
Disclosure of Invention
The invention aims to develop a novel laser crystal, which can directly use a flash lamp and an LD pumped laser crystal material with higher conversion efficiency.
Nd3+:Sr3La(BO3)3The crystal belongs to an orthorhombic system and has a Pnma space group structure. The neodymium ions are used as doping ions to replace the lattice position of lanthanum ions, the doping concentration of neodymium is between 0.05 at% and 10 at%, and when the doping concentration is 3 at%, the fluorescence lifetime (tau) is 65 mus, the fluorescence lifetime is a function of the concentration of the neodymium ions, and the neodymium ions with different concentrations can be doped according to different requirements. The experimental result shows that the medicine can be transfusedLaser with 1060nm wavelength is emitted and can be used as laser working substance.
Neodymium-doped strontium lanthanum borate is a compound with the same composition, and a large single crystal can be grown by a Czochralski method.
The specific chemical reaction is as follows:
the purity of the raw materials used and the manufacturer were as follows:
| name of medicine | Purity of | Manufacturer of the product |
| Nd2O3 | 99.99％ | Institute of chemistry for the application of Changchun in Chinese academy of sciences |
| SrCO3 | 99.9％ | Shanghai Wusi chemical reagent plant |
| La2O3 | 99.99％ | Institute of chemistry for the application of Changchun in Chinese academy of sciences |
| H3BO3 | 99.9％ | Shanghai chemical reagent company, China pharmaceutical group |
The main growth conditions were as follows: the growth is carried out in an iridium crucible in an inert gas (e.g. N)2Ar, etc.) and the technological parameters of crystal growth are as follows: the growth temperature is about 1340 ℃, the crystal rotation speed is 10-15 r/min, and the pulling speed is 0.5-1.0 mm/h. The specific growth process is shown in the examples.
Nd to be grown3+:Sr3La(BO3)3The crystal is subjected to diffraction data collection on a four-circle diffractometer, and structural analysis shows that the crystal belongs to an orthorhombic system, the space group is Pnma, the unit cell parameters are that a is 7.46 Å, b is 8.91 Å, c is 16.54 Å, and V is 1100 Å3Z is 4 and the density is 3.5g/cm3(ii) a The refractive index was 1.78 as measured by oil immersion.
Nd to be grown3+:Sr3La(BO3)3The crystal is analyzed and tested in absorption spectrum, fluorescence life and the like, and the result shows that: nd when the Nd-doped concentration is 3 at%3+:Sr3La(BO3)3The crystal has main absorption peak at 806nm, half-peak width of 10nm, and absorption transition cross section of 4.67 × 10-20cm2The larger half-peak width at 806nm is very suitable for pumping by adopting AsGaAl semiconductor laser, which is beneficial to the absorption of the laser crystal to the pump light and improves the pumping efficiency. Its emission transition cross section sigma at 1060nmemIs 1.86X 10-19cm2The full width at half maximum (FWHM) was 28nm, the fluorescence lifetime was 65. mu.s,
nd of the invention3+:Sr3La(BO3)3The crystal can be used for growing large-size single crystals by a pulling method, has good optical characteristics, can easily obtain laser output by flash lamp pumping and LD pumping, has the laser output wavelength of 1060nm, and can be used as a good laser crystal.
Detailed Description
The preferred scheme for implementing the invention is as follows:
nd with a doping concentration of 3.0 at.% is grown by Czochralski method3+Sr of3La(BO3)3And (3) laser crystals.
Accurately weighing La according to stoichiometric ratio2O3、Nd2O3、Sr3CO3、H3BO3Mixing, grinding, tabletting, solid-phase synthesizing at 900 deg.C for 24 hr in muffle furnace, and heatingSolid phase synthesis is carried out for 24 hours at the temperature of 1000 ℃, and the sample after solid phase synthesis is filled into a sample with the diameter of 70 multiplied by 50mm3Placing the iridium crucible in a pulling furnace, and adopting a pulling method to perform reaction on N2In the atmosphere, under the conditions of about 1340 ℃ of growth temperature, 10 rpm of crystal rotation speed and 1.0 mm/h of pulling speed, the crystal with the size of phi 20X 30mm is grown3High quality Nd3+:Sr3La(BO3)3And (4) crystals. The Nd ion concentration in the crystal was 1.238X 10 as measured by an electron probe20cm-3。
Claims (5)
1. A neodymium-doped strontium lanthanum borate laser crystal is characterized in that: the molecular formula of the crystal is
Nd3+:Sr3La(BO3)3Belongs to an orthorhombic system, the space group is Pnma, the unit cell parameter is a is 7.46 Å, b is 8.91 Å, c is 16.54 Å, and V is 1100 Å3Z is 4 and the density is 3.5g/cm3And a refractive index of 1.78.
2. The laser crystal of claim 1, wherein: nd (neodymium)3+The ions are used as doping ions to replace the lattice sites of lanthanum ions in the crystal, and the doping concentration is 0.05at-10 at%.
3. A method for preparing a laser crystal according to claim 1, characterized in that: the crystal is grown by Czochralski method at about 1340 deg.C at 10-15 rpm at 0.5-1.0 mm/hr.
4. Use of a laser crystal according to claim 1, characterized in that: the laser manufactured by using the crystal as a laser working substance is used in the fields of spectroscopy, biomedicine, military affairs and the like.
5. Use of a laser crystal according to claim 4, wherein: the solid laser manufactured by the crystal uses a flash lamp or a Laser Diode (LD) as a pumping source to excite and generate laser output with 1060nm wavelength.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031456847A 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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| CNB031456847A 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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| CN1566415A true CN1566415A (en) | 2005-01-19 |
| CN1318659C CN1318659C (en) | 2007-05-30 |
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Cited By (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 laser based on neodymium-doped gadolinium calcium oxide borate crystal |
| 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 |
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113986C (en) * | 1998-10-05 | 2003-07-09 | 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
Cited By (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 laser based on neodymium-doped gadolinium calcium oxide borate crystal |
| 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 |
| 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 |
| 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 |
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| CN1318659C (en) | 2007-05-30 |
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