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Femtosecond laser crystal of ytterbium doped with strontium gadolinium borate

A technology of femtosecond laser and ytterbium boric acid is applied in the field of femtosecond laser crystal materials to achieve the effect of short growth cycle

Inactive Publication Date: 2009-03-18
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

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

[0011] Example 1: The doping concentration is 2.0at.%Yb grown by pulling method 3+ Yb:Sr 3 Gd 2 (BO 3 ) 4 laser crystals. Accurately weighed SrCO according to the ratio 3 、Gd 2 o 3 、H 3 BO 3 , Yb 2 o 3 Mix and grind evenly, after tableting, put in φ60×40mm 3 In a platinum crucible, the solid phase reaction was carried out at 900°C for 12 hours in a muffle furnace, and then the temperature was raised to 1100°C for 10 hours. Put the synthesized above samples into the pulling furnace, adopt the pulling method, under N 2 In the atmosphere, when the growth temperature is 1455°C, the crystal rotation speed is 15rmp, and the pulling speed is 1mm / h, high-quality Yb with a size of Φ15mm×26mm is grown. 3+ 2.0at.% Yb:Sr 3 Gd 2 (BO 3 ) 4 crystals.

Embodiment 2

[0012] Example 2: The doping concentration is 5.0 at.% Yb grown by pulling method 3+ Yb:Sr 3 Gd 2 (BO 3 ) 4 laser crystals.

[0013] Accurately weighed SrCO according to the ratio 3 、Gd 2 o 3 、H 3 BO 3 , Yb 2 o 3 Mix and grind evenly, after tableting, put in φ60×40mm 3 In a platinum crucible, the solid phase reaction was carried out at 1050°C for 10 hours in a muffle furnace, and then the temperature was raised to 1200°C for 20 hours. Put the above synthesized samples into the pulling furnace, adopt the pulling method, in the Ar atmosphere, the growth temperature is 1465 ℃, the crystal rotation speed is 15rmp, and the pulling speed is 0.5mm / h. Φ10mm×22mm high quality Yb 3+ Yb:Sr with a content of 5.0 at.% 3 Gd 2 (BO 3 ) 4 crystals.

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Abstract

The present invention relates to artificial crystal technology, a especially a kind of femtosecond laser crystal of Yb-doped strontium gadolinium borate and its preparation process. The Yb-doped strontium gadolinium borate crystal is prepared through Czochralski method at growth temperature of 1455 deg C, pulling speed of 0.5-2 mm / hr and crystal rotation speed of 15-30 rpm. The said process can grow high quality and large size laser crystal of Yb-doped strontium gadolinium borate.

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 femtosecond laser crystal material used as a working substance in a solid-state femtosecond laser. Background technique [0002] Femtosecond laser crystal is the working substance of solid-state femtosecond 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. Various physical and chemical properties of femtosecond laser crystals are mainly determined by the host material, while its spectral characteristics and fluorescence lifetime are determined by the energy level structure of the activated ions. Since 1965, pulsed laser technology has developed rapidly since it entered the ultra-short range by using passive mode-locked ruby ​​lasers to obtain picosecond pulses. In the 197...

Claims

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Application Information

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IPC IPC(8): C30B29/22H01S3/16
Inventor 王国富张彦林州斌胡祖树张莉珍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI