Crystal material, preparation method thereof and application as laser crystal

A crystal material, single crystal technology, applied in the direction of polycrystalline material growth, laser, crystal growth, etc., can solve the problems of unfavorable crystal pumped laser performance, self-final state bottleneck effect, low LD pumping efficiency, etc. State bottleneck effect, reduction of lifetime and particle number, effect of high mechanical strength

Inactive Publication Date: 2017-12-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the main problems of erbium lasers are: (1) The absorption efficiency of commercial LD ​​pump sources (such as 980nm, 800nm) is low, resulting in low efficiency of LD pumps, which is not conducive to laser performance testing of crystal pumps ; (2) There are a variety of highly competitive transition luminescence channels, including red and green visible band up-conversion, near-infrared luminescence, etc.; (3) Low luminous efficiency; (4) There is a self-final state bottleneck effect

Method used

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  • Crystal material, preparation method thereof and application as laser crystal
  • Crystal material, preparation method thereof and application as laser crystal
  • Crystal material, preparation method thereof and application as laser crystal

Examples

Experimental program
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Embodiment 1

[0050] The preparation of embodiment 1 crystal material sample

[0051] Weigh CaCO according to the ratio in the following chemical reaction formula 3 , La 2 o 3 , Ga 2 o 3 、Er 2 o 3 and Nd 2 o 3 , mix well to get the raw material:

[0052] 2CaCO 3 +(1-x-y)La 2 o 3 +3Ga 2 o 3 +yEr 2 o 3 +xNd 2 o 3 →2CaNd x Er y La (1-x-y) Ga 3 o 7 +2CO 2 ↑

[0053] Press the raw material into a sheet, put it into a platinum crucible, put it into an ordinary sintering furnace, slowly raise the temperature to the pre-sintering temperature at a certain rate, and keep it for a period of time; Sample: Repeat the above pre-sintering and sintering steps until the X-ray powder diffraction is completely consistent with the XRD standard JCPDS card of the CLGO crystal to obtain a polycrystalline sample of the crystalline material.

[0054] Put the raw materials into the iridium crucible of Ф62mm×40mm. In order to avoid the oxidation of the iridium crucible, firstly extract the ai...

Embodiment 2

[0058] The optical property measurement of embodiment 2 gained sample

[0059] Take sample S1 separately # ~S5 # , the processed size is 5.0×5.0×1.0mm 3 The crystal slices were tested for spectral properties.

[0060] The results showed that sample S1 # ~S5 # The absorption spectrum also shows the Nd 3+ and Er 3+ The characteristic absorption peaks, wherein, the peak wavelengths are 378,488,523,652,801,979 and 1536nm respectively, corresponding to Er: 4 I 15 / 2 arrive 4 G 11 / 2 + 2 K 15 / 2 , 4 f 7 / 2 , 2 h 11 / 2 , 4 f 9 / 2 , 4 I 9 / 2 , 4 I 11 / 2 and 4 I 13 / 2 transition, and the absorption peaks with peak wavelengths of 360, 588, 750, 808, and 882nm respectively correspond to Nd 3+ : 4 I 9 / 2 arrive 4 D. 3 / 2 , 4 G 5 / 2 + 2 G 7 / 2 , 4 f 7 / 2 + 4 S 3 / 2 , 4 f 5 / 2 + 2 h 9 / 2 and 4 f 3 / 2transition, the absorption peak with the largest absorption intensity and the widest width is located in the 780-835nm band, and the peak wavelength is 808nm, mainly from...

Embodiment 3

[0065] The application of embodiment 3 gained sample in laser device

[0066] Take sample S1 separately # ~S5 # , the processed size is 2mm×2mm×(5~10)mm, the two ends of the crystal are 2mm×2mm polished, and it is applied to the laser device. The device diagram of the laser device is shown in Figure 4 As shown, the crystal sample is put into a water-sealed copper tube, the pump source used is 808nm LD, and the end-pump mode is adopted. The input mirror is a concave mirror with a diameter of 200mm, which is highly transparent at 808nm and highly reflective at 2.7μm. The coupling mirror is a flat mirror with transmittance of 1%, 2% and 3% at the laser wavelength. The laser spectrum is measured by a laser wavelength meter, the model is 821B-IR, Bristol, and the laser power is measured by a power meter, the model is LPE-1B.

[0067] The results showed that the samples S1 were applied respectively # ~S5 # The laser devices are capable of achieving 2.7μm band mid-infrared ult...

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Abstract

The invention discloses a crystal material, which is characterized in that the chemical formula of the crystal material is CaNdxEryLa(1-x-y)Ga3O7, wherein x is greater than or equal to 0.01 and less than or equal to 0.05, and y is greater than or equal to 0.1 and less than or equal to 0.3; the crystal material belongs to a tetragonal system and a space group shown in the description; the crystal material is formed into a laminated electronegative skeleton structure formed by a GaO4 tetrahedron, and Nd<3+>, Er<3+>, Ca2<+> and La<3+> are distributed among layers and have an unordered crystal structure. An Nd<+> ion is doped in Er<+3> activated CaLaGa3O7 crystal to greatly enhance the adsorption efficiency of the crystal for pump light, the efficient laser output of the -2.7mu m waveband of LD pumping is realized, the fluorescence emission of the crystal in an intermediate infrared waveband is enhanced, the service life and the particle number of 4I13/2 are greatly decreased, a self-final state bottleneck effect is inhibited, high gain is kept by laser media in an oscillation process, and the slope efficiency of the laser output is improved.

Description

technical field [0001] The application relates to a novel mid-infrared ultrafast laser crystal material, its preparation method and application, and belongs to the field of inorganic crystal materials. Background technique [0002] Ultrafast laser (pulse width picoseconds (10 -12 s) to femtoseconds (10 -15 s) magnitude) has the characteristics of extremely high peak power, extremely short duration, and extremely wide spectrum, and is one of the frontier research hotspots that scientists are rushing to. The market potential of ultrafast lasers is huge. However, at present, most ultrafast laser sources are concentrated in the ultraviolet, visible and near-infrared bands. The development of laser technology, including ultrafast lasers in the mid-infrared band including ~2.7μm, lags behind significantly. Since 2011, Nature Photonics has published a series of papers. A group of top international scientists have reviewed the development status and trends of mid-infrared lasers,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B15/00C30B28/02H01S3/0941H01S3/16
CPCC30B29/22C30B15/00C30B28/02H01S3/0941H01S3/163
Inventor 王燕刘云云李坚富朱昭捷游振宇涂朝阳
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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