CN1837421A - Neodymium doped LiGd(MoO4)2 laser crystal, its preparation method and use - Google Patents
Neodymium doped LiGd(MoO4)2 laser crystal, its preparation method and use Download PDFInfo
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- CN1837421A CN1837421A CN 200510063992 CN200510063992A CN1837421A CN 1837421 A CN1837421 A CN 1837421A CN 200510063992 CN200510063992 CN 200510063992 CN 200510063992 A CN200510063992 A CN 200510063992A CN 1837421 A CN1837421 A CN 1837421A
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Abstract
Disclosed is neodymium-doped gadolinium lithium molybdate laser crystal, its preparation process and use thereof, wherein the crystal is prepared through a Czochralski method conducted at 1035 deg C at a crystal rotational speed of 20-55 rpm, the obtained high quality large scale Nd3+:LiGd(MoO4)2 crystal can be applied into the fields of optical spectroscopy, biological medicine and military purpose.
Description
Technical field
The present invention relates to artificial lens and growth field thereof, 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.Neodymium doped LiGd (MoO 4) 2 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, the laser crystal material with higher conversion efficiency.
Summary of the invention
Purpose of the present invention just is to develop a kind of new laser crystals Nd
3+: LiGd (MoO
4)
2, can directly use photoflash lamp and LD pumping, laser crystal material with higher conversion efficiency.
Nd
3+: LiGd (MoO
4)
2Crystal belongs to tetragonal system, has I4 (1)/a (C
4h 6) the spacer structure.Wherein neodymium ion is as dopant ion, replace the crystallographic site of gadolinium 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 1.06 and 0.9 μ m wavelength around, can be used as laser crystals.
Nd
3+: LiGd (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, 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 |
| Gd 2O 3 | 99.999％ | Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences |
| Li 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 oxygen rich gas (as air etc.) atmosphere, the parameter of crystal growth is about growth temperature 1030-1035 ℃, pulling speed is 0.5～1.0 millimeter/hour, and 20～55 rev/mins of crystal rotating speeds have grown high-quality Nd
3+: LiGd (MoO
4)
2Crystal.
With the Nd that grows
3+: LiGd (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 I4 (1)/a (C
4h 6), unit cell parameters is a=b=5.20 , c=11.32 , V=306.9
3, density 5.44g/cm
3
With the Nd that grows
3+: LiGd (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+Ionic Nd
3+: LiGd (MoO
4)
2Crystalline master absorption peak is at 804nm, and its peak width at half height is 12nm, and the absorption jump cross section is 9.17 * 10
-20Cm
2, be very suitable for adopting the AsGaAl semiconductor laser to carry out pumping in the bigger peak width at half height in 804nm place, help the absorption of laser crystals to pump light, improve pumping efficiency.It has the emission band of three non-constant widths at the 850nm-1400nm wave band, wherein peak center is 14nm in the peak width at half height (FWHM) of 1070nm place emission peak, fluorescence lifetime is 0.106ms, because the crystal that fluorescence lifetime is long can accumulate more particle at last energy level, increase energy storage, helped the raising of device output rating and output energy.Therefore, Nd
3+: LiGd (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+: LiGd (MoO
4)
2Crystal can grow superior in quality crystal easily with crystal pulling 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, 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+: LiGd (MoO
4)
2Laser crystals.
Will be by the load weighted Li of proportion speed
2CO
3, Gd
2O
3, MoO
3, Nd
2O
3Mixed grinding is even, behind the compressing tablet, puts into φ 60 * 40mm
3Platinum crucible in, in retort furnace in 700 ℃ of solid state 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 crystal pulling method, in air atmosphere, growth temperature is that 1035 ℃, crystal rotating speed are 38 rev/mins, and pulling rate is under 0.5 millimeter/hour the situation, to have grown and be of a size of 25 * 20 * 20mm
3High-quality Nd
3+Content is the Nd of 1.0at.%
3+: LiGd (MoO
4)
2Crystal.
Claims (5)
1. neodymium doped LiGd (MoO 4) 2 laser crystal, it is characterized in that: this crystalline molecular formula is LiGd (MoO
4)
2, belonging to tetragonal system, spacer is I4 (1)/a (C
4h 6), unit cell parameters is a=b=5.20 , c=11.32 , V=306.09
3, D
c=5.44g/cm
3
2. laser crystals as claimed in claim 1 is characterized in that: Nd in this crystal
3+Ion is doped in the crystal as the laser active ion, replaces Gd in the crystal
3+The ionic crystallographic site, its doping content is between 0.5at.-15at.%.
3. the preparation method of the laser crystals of a claim 1 is characterized in that: this crystal by adopting Czochralski grown, and with Gd
2O
3, Li
2CO
3, MoO
3And Nd
2O
3Be raw material, press chemical equation:
Ratio claim sample, mixing, compressing tablet, and Nd
2O
3Then press desired concn and add, in platinum crucible, pulling growth goes out crystal under the oxygen-enriched atmosphere, and the parameter of crystal growth is about growth temperature 1030-1035 ℃, and pulling speed is 0.5～1.0 millimeter/hour, and the crystal rotating speed is 20～55 rev/mins.
4. the purposes of the laser crystals of a claim 1, it is characterized in that: this crystal is used for solid statelaser as working-laser material, use photoflash lamp or laser diode (LD) as pumping source, excite the laser output that produces 1.06 and 0.9 μ m wavelength around.
5. the purposes of laser crystals as claimed in claim 4, it is characterized in that: the solid statelaser made from this crystal is used for spectroscopy, biomedicine, military field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510063992 CN1837421A (en) | 2005-03-25 | 2005-03-25 | Neodymium doped LiGd(MoO4)2 laser crystal, its preparation method and use |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510063992 CN1837421A (en) | 2005-03-25 | 2005-03-25 | Neodymium doped LiGd(MoO4)2 laser crystal, its preparation method and use |
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| Publication Number | Publication Date |
|---|---|
| CN1837421A true CN1837421A (en) | 2006-09-27 |
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ID=37014925
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|---|---|---|---|
| CN 200510063992 Pending CN1837421A (en) | 2005-03-25 | 2005-03-25 | Neodymium doped LiGd(MoO4)2 laser crystal, its preparation method and use |
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Cited By (6)
| 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 |
| CN101457399B (en) * | 2007-12-11 | 2013-01-02 | 中国科学院福建物质结构研究所 | Erbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof |
| CN102978705A (en) * | 2011-09-06 | 2013-03-20 | 中国科学院福建物质结构研究所 | Thulium and holmium co-doped gadolinium lithium molybdate laser crystal, and preparation method and application thereof |
| CN109749741A (en) * | 2019-01-21 | 2019-05-14 | 中国计量大学 | A kind of fluorescence membrane of the powder containing near-infrared fluorescent and application |
| CN111763987A (en) * | 2020-07-06 | 2020-10-13 | 暨南大学 | Tm (Tm)3+Self-activated laser crystal and preparation method thereof |
-
2005
- 2005-03-25 CN CN 200510063992 patent/CN1837421A/en active Pending
Cited By (7)
| 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 |
| CN101457399B (en) * | 2007-12-11 | 2013-01-02 | 中国科学院福建物质结构研究所 | Erbium sodium ion double doped strontium molybdate laser crystal and preparation method thereof |
| CN102978705A (en) * | 2011-09-06 | 2013-03-20 | 中国科学院福建物质结构研究所 | Thulium and holmium co-doped gadolinium lithium molybdate laser crystal, and preparation method and application thereof |
| CN109749741A (en) * | 2019-01-21 | 2019-05-14 | 中国计量大学 | A kind of fluorescence membrane of the powder containing near-infrared fluorescent and application |
| 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 |
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