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Tunable laser crystal chrome-doped sodium magnesium molybdate and preparation method thereof

A laser crystal, chromomolybdic acid technology, applied in crystal growth, chemical instruments and methods, optics, etc., can solve problems such as inability to industrial applications, and achieve the effects of moderate mechanical properties, easy availability of raw materials, and wide wavelength band.

Inactive Publication Date: 2014-07-02
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

[0003] Since 1963, L.F.Johnson et al. have used flash lamp pumping, in doped Ni 2+ MgF 2 Since the first solid-state tunable laser operation was realized in a crystal (L.F.Johnson R.E.Dietz&H.J.Guggenheim, J.Phys.Rev.Lett., 11(1963)318), many tunable laser crystals have been discovered, such as Ti 3+ :Al 2 o 3 、Cr 3+ :Mg 2 SiO 4 、Cr 3+ :LiSrAlF 6 、Cr 3+ :BeAl 2 o 4 etc., but due to various reasons, most tunable laser crystals are limited to laboratory tools and cannot be promoted to industrial applications
The tunable laser crystal that has been studied the most and has entered the application field is Cr 3+ :BeAl 2 o 4 (Alexandrite), Ti 3+ :Al 2 o 3 (titanium-doped sapphire) and Cr 3+ :LiCaAlF 6 、Cr 3+ :LiSrAlF 6 , but considering factors such as the tunable wavelength range, absorption coefficient, emission cross-section, pumping method, and growth process of the crystal, there is currently no crystal that can well meet people's needs. Therefore, the new tunable laser crystal R&D is still under the spotlight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material for growth is Na 2 Mg 5 (MoO 4 ) 6 :Na 2 Mo 2 o 7 : Cr 2 o 3 =1:3:0.05 (molar ratio), doped with 2at.% Cr 3+ Ions (Cr in raw materials 3+ Moles / Cr in raw materials 3+ with Mg 2+ total number of moles). The growth is carried out by the molten salt top seed crystal method, the raw material is placed in a platinum crucible with a size of φ60×50mm, the growth temperature is 880→800°C, the cooling rate is 1°C / day, and the crystal rotation speed is 15 revolutions / min. In 15 days, a size of better quality Cr 3+ :Na 2 Mg 5 (MoO 4 ) 6 crystals. The analysis by ICP (plasma emission spectrometry) shows that Cr in the crystal 3+ The ion content is 8.42×10 19 cm 3 , Cr 3+ The segregation coefficient of ions is 0.52.

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Abstract

The invention provides tunable laser crystal chrome-doped sodium magnesium molybdate and a preparation method thereof. A molten salt top seed crystal method is adopted, 55-80at.% of Na2Mo2O7 is used as a melting assistant, and the growth parameters are as follows: the cooling velocity is 0.5-3 DEG C / day, the growth temperature is 800-880 DEG C, the rotation speed is 5-30rpm / minute, and a Cr<3+>:Na2Mg5(MoO4)6 crystal which is relatively good in quality and relatively large in size is grown, wherein the doping concentration of Cr<3+> is 0.2-5at.%. The crystal belongs to a triclinic system, and has a P-1 space group structure as shown in the specification. The crystal has the characteristics that the mechanical property is moderate, the tunable laser wave band is wide, the emission cross section is large, and the like, and is a relatively good tunable laser crystal material.

Description

technical field [0001] The invention relates to the technical field of optoelectronic functional materials, in particular to a laser crystal material used as a working substance in a tunable solid-state laser. Background technique [0002] Tunable laser refers to the laser whose laser wavelength can be continuously changed within a certain wavelength range (that is, within a wide spectral interval). Tunable laser technology is of great significance in science and technology and national defense construction. Tunable lasers are the main technical equipment for the research of various laser spectroscopy technologies, and also an important light source for the research of optics, optoelectronics, medicine, biology, etc. In the military, tunable lasers will be one of the important laser light sources for future optoelectronic countermeasures, such as lidar, laser communication, laser underwater detection and communication, laser remote sensing, laser blinding, etc. [0003] Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B9/12G02F1/355
Inventor 张莉珍王国富林州斌黄溢声
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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