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Tunable laser crystal chrome-mixing magnesium molybdate and preparation method thereof

A technology of laser crystal and magnesium chromium molybdate, which is applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve problems such as incapable of industrial application, and achieve moderate mechanical properties, stable growth process, and wide tunable laser band Effect

Inactive Publication Date: 2012-07-04
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, and 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 reported, 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, and growth process of the crystal, there is currently no crystal that can meet people's needs well, so the research and development of new tunable laser crystals is still subject to people's attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: with K 2 Mo 2 o 7 Used as a flux to grow Cr 3+ Cr with ion doping concentration of 0.48at.% 3+ :MgMoO 4 the crystal

[0020] The growth material is MgMoO 4 : K 2 Mo 2 o 7 =3:4 (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). Using the molten salt top seed method, the raw material is placed in a platinum crucible with a size of φ60×50mm, the growth temperature is 860°→780°C, the cooling rate is 2°C / day, and the crystal rotation speed is 15 revolutions / min. After 20 Born to grow a size of 30 x 20 x 15mm 3 high quality Cr 3+ :MgMoO 4 crystals. The analysis by ICP (plasma emission spectrometry) shows that Cr in the crystal 3+ The ion content is 0.48at.%, Cr 3+ The segregation coefficient of ions is 0.24.

Embodiment 2

[0021] Embodiment 2: with K 2 Mo 2 o 7 Used as a flux to grow Cr 3+ Cr with ion doping concentration of 0.72at.% 3+ :MgMoO 4 the crystal

[0022] The growth material is MgMoO 4 : K 2 Mo 2 o 7 =3:5 (molar ratio), doped with 3at.% Cr 3+ ion. Using the molten salt top seed method, the raw material is placed in a platinum crucible with a size of φ60×50mm, the growth temperature is 840°→750°C, the cooling rate is 1°C / day, the crystal rotation speed is 15 rpm, after 30 Born to grow a size of 28 × 17 × 14mm 3 high quality Cr 3+ :MgMoO 4 crystals. The analysis by ICP (plasma emission spectrometry) shows that Cr in the crystal 3+ The ion content is 0.72 at.%.

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Abstract

The invention provides a tunable laser crystal chrome-mixing magnesium molybdate and a preparation method thereof. A fused salt top-seeded method is adopted, 55-80at.%K2Mo2O7 serves as a fluxing agent, growth parameters include that cooling speed is 0.5-5 DEG C / day, growth temperature is 700-880 DEG C, rotation speed is 5-30 turns / minute, and high quality big-sized Cr 3+: MgMoO4 crystal is grown. The crystal belongs to a monoclinic system and has a C2 / m space group structure, and a=10.273, b=9.288, c=7.025, beta=106.96 degrees, z=8, V=641.14, and Dc=3.82 g / cm3. The crystal has the advantages of being moderate in mechanical performance, wide in tunable laser wave band, big in emission section, short in fluorescence service life and the like and is a 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. [0002] Tunable laser refers to such an effect: the laser working medium in the laser system is excited by the pump light, and the emission peak of the laser working medium is a wave packet with a relatively wide wavelength range, or has multiple wavelengths in a certain wavelength range. On this basis, prism tuning method, F-P etalon tuning method, grating tuning method, optical filter tuning method and distributed feedback system tuning method are used to obtain a laser whose output wavelength is adjustable within a certain range, that is, Tuning the laser. Background technique [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.Di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B9/12H01S3/16
Inventor 王国富李凌云林州斌王国建张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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