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Neodymium doped lithium lanthanum tungstate lacer crystla and its prepn

A lithium neodymium lanthanum tungstate and laser crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of unsatisfactory crystal quality and long growth period, and achieve excellent optical properties and hard crystal texture. , The effect of stable growth process

Inactive Publication Date: 2005-10-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

In the tungstate system, more Nd-doped 3+ Ionic laser crystal materials, the more famous ones are: Nd 3+ :NaY(WO 4 ) 2 、Nd 3+ :KY(WO 4 ) 2 and Nd 3+ :KGd(WO 4 ) 2 etc., and have achieved laser output, but because there are different phase structures in the crystals, they can only be grown by flux method, the growth period is long, and the quality of the grown crystals is not ideal

Method used

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Embodiment Construction

[0012] Pull method growth doped with 4.3at.%Nd 3+ Nd 3+ :LiLa(WO 4 ) 2 Laser crystal:

[0013] The Li weighed according to the chemical reaction formula 2 CO 3 , La 2 o 3 、WO 3 and Nd 2 o 3 (the purity of the chemicals used are all 99.99%) poured into the mortar, grinded and mixed evenly, pressed into tablets, placed in a muffle furnace, and solid-phase synthesized at 780°C for 48 hours; After solid phase synthesis at 900°C for 60 hours, the desired Nd 3+ :LiLa(WO 4 ) 2 Raw material for growth. Using the pulling method, in a φ60×50mm platinum crucible, the growth temperature is 1065°C, the crystal rotation speed is 10-25 rpm, the pulling speed is 1.0mm / hour, and the growth atmosphere is air. Grow a size of φ22×24mm 3 of high quality Nd 3+ :LiLa(WO 4 ) 2 crystals. Electron probe analysis showed that Nd in the crystal 3+ The ion content is 4.3 at%.

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Abstract

The present invention relates to neodymium doped lithium lanthanum tungstate laser crystal and its preparation process, and relates to artificial crystal. In the Czochralski process at 1065 deg.c, the crystal rotated at 10-35 rpm grows in drawing speed of 0.5-0.6 mm / hr. The crystal is tetragonal one and has space group of 14(1) / a(C4h6), density of 3.152 g / cu cm and refractive index of 2.0. The crystal has one strong absorption peak at 805 nm with absorption cross section of 1.88E(-20) sq cm and hemi-peak width of 18 nm; is suitable for being pumped with laser diode; has strong fluorescent emitting peak at 1062 nm, emitting transition cross section of 21.7E(-20) sq cm, is easy to generate 1062 nm laser output, and expects to obtain practical use.

Description

technical field [0001] The invention relates to the field of artificial crystals 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. technical background [0002] 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 1960, hundreds of laser crystals have been discovered so far, but due to various reasons, there are only a dozen kinds of laser crystals that can really be used in practice. [0003] At present, the most widely used laser crystal is yttrium aluminum garnet (YAG) crystal doped with neodymium ions, which has good physical and ch...

Claims

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Application Information

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IPC IPC(8): C30B15/00C30B29/32H01S3/16
Inventor 王国富黄新阳林州斌胡祖树张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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