Nd, Er:GSAG laser crystal and its preparing method

A laser crystal and crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problem of low pumping efficiency and achieve the effect of improving absorption efficiency

Inactive Publication Date: 2014-04-02
JIANGSU SENFENG CRYSTAL TECH
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

But in single doped Er 3+ In laser materials, due to Er 3+ The high-efficiency absorption band does not match the wavelength of the currently developed LD laser, so the pumping efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of Nd,Er:GSAGO with Nd and Er doping concentrations of 1at% and 30at% respectively 4 Single crystal:

[0018] 1. Using Nd 2 o 3 、Er 2 o 3 、Gd 2 o 3 、Sc 2 o 3 、Al 2 o 3 As a raw material, carry out batching according to the following compound formula, get (Eq.1) in x =0.01 / c , y =0.3 / d , assuming that the segregation coefficients of Nd and Er in the growth of GSAG crystal are respectively c , d , then (Eq.1) chemical reaction formula is

[0019] 0.03 / c Nd 2 o 3 +0.9 / d Er 2 o 3 +(3-0.03 / c -0.9 / d ) Gd 2 o 3 +2Sc 2 o 3+3Al 2 o 3 =

[0020] 2Nd 0.03 / c Er 0.9 / d Gd 3 (1-0.01 / c -0.3 / d )Sc 2 Al 3 o 12

[0021] Assume T =10.0943 / c + 344.265 / d +(1-0.01 / c -0.3 / d )×1087.49+581.704,

[0022] X =(10.0943 / c ) / T ,

[0023] Y =(344.265 / d ) / T ,

[0024] Z=(1-0.01 / c -0.3 / d )×1087.49 / T ,

[0025] U =275.82 / T ,

[0026] V =305.884 / T ,

[0027] Assuming that the raw materials to be prepare...

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Abstract

The invention relates to an Nd, Er:GSAG laser crystal and its preparation method. The chemical formula of the laser crystal is Nd<3+>, Er<3+>:Gd3Sc2Al3O12, which can be abbreviated as Nd, Er:GSAG. The molecular formula is Nd3xEr3yGd3(1-x-y)Sc2Al5O12, wherein x is greater than or equal to 0.001 and is smaller than or equal to 0.2, and y is greater than or equal to 0.005 and is smaller than or equal to 0.5. The preparation method includes: taking Nd2O3, Er2O3, Gd2O3, Sc2O3 and Al2O3 as raw materials, mixing them according to a required proportion, and conducting briquetting, then acquiring crystal growth initial raw materials by a solid phase technique, and carrying out orientated growth by means of Czochralski technique, temperature gradient technique, heat exchange technique, Bridgman technique or kyropoulos technique, thus obtaining the Nd, Er:GSAG laser crystal. As a sensitizing ion, Nd<3+> can transfer the absorbed energy to Er<3+> ions in the crystal, thus enhancing the pumping efficiency of laser near 2.7-2.9 micrometers of Er:GSAG. The laser in the wave band has important application in biomedical treatment, optical parametric oscillation, optoelectronic countermeasure and other fields.

Description

technical field [0001] The invention belongs to the field of laser crystal materials, and in particular relates to a Nd, Er:GSAG laser crystal with excellent comprehensive performance and a preparation method thereof. Background technique [0002] Er 3+ Ionic 2.7-3μm band lasers have important applications in medical, scientific research and military fields. But in single doped Er 3+ In laser materials, due to Er 3+ The high-efficiency absorption band of LD does not match the wavelength of the currently developed LD laser, so the pumping efficiency is low. In order to improve the pumping efficiency, Nd 3+ ion pair Er 3+ ions for sensitization, the Nd 3+ The energy absorbed by the ions is transferred to Er 3+ ions, due to Nd 3+ Ions have a very strong absorption in the central wavelength of 808nm, therefore, use Nd 3+ to Er 3+ Effective sensitization can greatly improve the pumping efficiency. At the same time, the LD laser with a center wavelength of 808nm is a wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22H01S3/16
Inventor 张坤
Owner JIANGSU SENFENG CRYSTAL TECH
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