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Neodymium-doped gadolinium barium lithium tungstate laser crystal and preparation method and application thereof

A laser crystal, neodymium lithium tungstate technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of unsuitable LD pumping, narrow absorption spectrum, etc., and achieve excellent optical characteristics and growth process The effect of stable and good thermal conductivity

Inactive Publication Date: 2012-08-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, it has the disadvantage of narrow absorption spectrum and is not suitable for pumping by LD, and LD pumping will be the development direction of laser pumping sources in the future.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: with Li 2 WO 4 Nd doped for flux growth 3+ Nd 3+ : Li 3 Ba 2 Gd 3 (WO 4 ) 8 laser crystals.

[0016] The growth material is Li 3 Ba 2 Gd 3 (WO 4 ) 8 : Li 2 WO 4 =1:4 (molar ratio), doped with 6at% Nd 3+ ion. Using the molten salt top seed crystal method, in a φ60×50mm platinum crucible, the growth temperature is between 900 and 980°C, with a cooling rate of 1°C / day and a crystal rotation speed of 30 rpm, a crystal with a size of 40 ×23×15mm 3 of high quality Nd 3+ : Li 3 Ba 2 Gd 3 (WO 4 ) 8 crystals. The ICP (plasma emission spectrometry) analysis shows that Nd in the crystal 3+ The ion content is 3.03 at%.

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Abstract

The invention relates to a neodymium-doped gadolinium barium lithium tungstate laser crystal and a preparation method and application thereof. The high-quality crystal with large size is grown by using 30-60at% Li2WO4 as a fluxing agent under the conditions that the cooling rate is 0.5-2 DEG C / day and the rotating speed is 5-30r / min. The crystal belongs to the monoclinic system and has C2 / c spacegroup structure. The main absorption peak of the Nd<3+>:Li3Ba2Gd3(WO4)8 crystal is 804nm, the half-peak width is 19nm and the absorption transition cross section is 5.37*10<-20>cm<2>, and the crystalis suitable for being pumped by the AsGaAl semiconductor laser. A quite wide emission band exists in the range from 850nm-1400nm. The emission transition cross section at the emission peak of 1064nm is 12.08*10<-20>cm<2>, the fluorescence lifetime is 0.153ms, and the crystal is easy to generate and output lasers with wavelength being 1064nm.

Description

technical field [0001] A neodymium-doped lithium-barium-gadolinium tungstate laser crystal and its preparation method and application relate to the field of artificial crystal and crystal growth in the technical field of optoelectronic functional materials, in particular to a laser crystal material used as a working substance in a solid-state laser. Background technique [0002] Laser crystal is the working substance of solid-state laser. It refers to the luminescent material that uses crystal as the matrix to absorb pump light energy and convert it into laser output through discrete luminescent centers. The solid-state laser working substance is composed of matrix material and active ions. Its various physical and chemical properties are mainly determined by the matrix material, while its spectral characteristics and fluorescence lifetime are determined by the energy level structure of the active ion. Since the artificial ruby ​​pulse laser was successfully developed in 196...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/32C30B9/00H01S3/16
Inventor 王国富李浩张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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