Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and method for preparing same

A technology of laser crystals and potassium chromate tungstate, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of small emission cross section, difficult growth, and inability to promote industrial applications, etc., to achieve tunable laser band wide, stable growth process, and excellent optical properties

Inactive Publication Date: 2012-10-24
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

Subsequently, many tunable laser crystals appeared, 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, many 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 they also have some unavoidable defects that limit their application range
[0004] Cr 3+ :BeAl 2 o 4 The main disadvantages of (Alexandrite) crystals are: the tuning range is between 700 and 800nm, and the emission cross section is small (6×10 -21 cm 2 ), the required pumping threshold is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1: Using K 2 W 2 O 7 The doping concentration for flux growth is 1.0at.%Cr 3+ Cr 3+ : KMgSc(WO 4 ) 3 Laser crystal.

[0020] The growth material is KMgSc(WO 4 ) 3 : K 2 W 2 O 7 =1:4 (molar ratio), doped with 1.0at% Cr 3+ ion. Using the flux method, in the φ60×50mm platinum crucible, the growth temperature is between 820~750℃, and the crystal rotation speed is 5 revolutions per minute at a cooling rate of 1℃ / day to grow a size of 25×25× 10mm 3 Of high quality Cr 3+ :KMgSc(WO 4 ) 3 Crystal. ICP (plasma emission spectroscopy) analysis shows that Cr in the crystal 3+ The ion content is 0.5 at%.

Example Embodiment

[0021] Example 2: Using K 2 W 2 O 7 The doping concentration for flux growth is 2.0at.%Cr 3+ Cr 3+ : KMgSc(WO 4 ) 3 Laser crystal.

[0022] The growth material is KMgSc(WO 4 ) 3 : K 2 W 2 O 7 =2:3 (molar ratio), doped with 2.0at% Cr 3+ ion. Using the flux method, in the φ60×50mm platinum crucible, the growth temperature is between 850~770℃, and the crystal speed is 30 rpm at a cooling rate of 3℃ / day to grow a size of 15×15× 10mm 3 Of high quality Cr 3+ :KMgSc(WO 4 ) 3 Crystal. ICP (plasma emission spectroscopy) analysis shows that Cr in the crystal 3+ The ion content is 1.0 at%.

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Abstract

The invention provides a Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and a method for the crystal. The crystal belongs to the trigonal system and has the space group as descried in the description and the following cell parameters: a=9.493A, C=24.545A, V=1915.68A<3>, Z=6 and Dc=4.412g/cm<3>. The crystal can be grown by using flux growth method, wherein the 60-80at% K2W2O7 is used as flux, the temperature decreasing speed is 1-5 DEG C per day, and the rotating speed is 5-30rpm. The high-quality large-size Cr<3+>:KMgSc(WO4)3 crystal has the tunable range of 710-1300nm and is expected to become a novel tunable laser crystal for practical application.

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 such an effect: the pump excites the active ions doped in the solid-state laser matrix to generate laser light, using prism tuning method, F-P etalon tuning method, grating tuning method, filter tuning method and distributed feedback System tuning method, etc. to obtain tunable laser output. [0003] In 1963, L.F. Johnson and others used flash lamp pumping, doped with Ni 2+ MgF 2 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). Subsequently, many tunable laser crystals appeared, 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, many tunabl...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B9/12
Inventor 王国建王国富林州斌张莉珍黄溢声
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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