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High-temperature rare earth oxide laser crystal and preparation method thereof

A technology of rare earth oxides and laser crystals, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., to achieve the effects of less cracking, high transparency, and short cycle times

Active Publication Date: 2010-10-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, rare earth oxide laser crystals grown by the optical floating zone method have not been reported as laser gain media.

Method used

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  • High-temperature rare earth oxide laser crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Nd:Lu 2 o 3 the crystal

[0039] Preparation (Nd x Lu 1-x ) 2 o 3 , the specific chemical equation is: xNd 2 o 3 +(1-x)Lu 2 o 3 =(Nd x Lu 1-x ) 2 o 3

[0040] The raw material that present embodiment adopts is Nd 2 o 3 and Lu 2 o 3 , take x=0.01 in the matching ratio, and set Nd 2 o 3 (4N) and Lu 2 o 3 (5N) The raw material is properly dried in the air, then strictly weighed according to the stoichiometric ratio, and fully mixed, put into a Pt crucible and sintered at 1000-1100°C for 8 hours, and the obtained polycrystalline material is ground into a fine powder with an average particle size The diameter is 4μm. Take 30g and 15g of polycrystalline materials and put them into two long balloons respectively, compact them with glass rods, vacuumize them and put them under hydrostatic pressure of 68KN for 1 minute to make 2 round rods with the same diameter. is 10mm, the lengths are 80mm and 40mm respectively, and then sintered in a rotary s...

Embodiment 2

[0042] Example 2: Nd:Sc 2 o 3 the crystal

[0043] Preparation (Nd x sc 1-x ) 2 o 3 , chemical equation: xNd 2 o 3 +(1-x)Sc 2 o 3 =(Nd x sc 1-x ) 2 o 3

[0044] The raw material that present embodiment adopts is Nd 2 o 3 and Sc 2 o 3 , take x=0.01 in the matching ratio, and set Nd 2 o 3 (4N) and Sc 2 o 3 (5N) high-purity raw materials, dried properly in the air, then strictly weighed according to the stoichiometric ratio, and fully mixed, put into a Pt crucible and sintered at 1000-1100°C for 8 hours, and the obtained polycrystalline material was ground into fine powder, with an average particle size of 4 μm.

[0045] According to the method of Example 1, two polycrystalline material rods were prepared and loaded into the floating zone growth furnace, and the temperature was raised until the lower end of the upper material rod and the upper end of the seed crystal rod melted, and the contact began to grow, and the growth temperature range was 2400-2500 ° ...

Embodiment 3

[0046] Example 3: Yb:Lu 2 o 3 the crystal

[0047] Preparation (Yb x Lu 1-x ) 2 o 3 , chemical equation: xYb 2 o 3 +1-xLu 2 o 3 =(Yb x Lu 1-x ) 2 o 3

[0048] The raw material that present embodiment adopts is high-purity Yb 2 o 3 and Lu 2 o 3 , take x=0.05 in the matching ratio, and Yb 2 o 3 (4N) and Lu 2 o 3 (5N) high-purity raw materials, dried properly in the air, then strictly weighed according to the stoichiometric ratio, and fully mixed, put into a Pt crucible and sintered at 1000-1100°C for 8 hours, and the obtained polycrystalline material was ground into fine pink.

[0049] According to the method of Example 1, two polycrystalline material rods were prepared and loaded into a floating zone growth furnace, and the rest of the growth conditions were the same as in Example 1. After the growth, cool down to room temperature for five hours. The crystals taken out from the floating zone furnace are colorless and transparent. Hereafter Yb:Lu 2 o 3...

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Abstract

The invention relates to a rare earth oxide crystal and a preparation method thereof. The structural general formula of the crystal is (LnxRe1-x)2O3, the crystal belongs to a cubic crystal system, the space group is Ia3, and the crystal is in a bixbyite structure. The preparation method of the rare earth oxide laser crystal comprises the following steps of: firstly, manufacturing polycrystalline materials by taking Re2O3 and Ln2O3 as raw materials; then, manufacturing material bars; and filling the material bars into an optical floating zone growing furnace for growing according to a floating zone method. The method of the invention has high speed and short cycle, a crucible is not needed in crystal growth, the pollution on the crystal is reduced, and the growing crystal has high transparency and less cracks and is suitable for laser devices.

Description

technical field [0001] The invention relates to a series of high-temperature rare earth oxide crystals and a preparation method thereof, belonging to the field of high-temperature oxide laser crystal materials. Background technique [0002] Since the 1960s, the study of rare earth oxide crystals has attracted great interest due to the excellent thermomechanical properties of rare earth oxide crystals, such as: high thermal conductivity, good optical properties including low phonon Energy and wide transmittance (from visible light to infrared region), so that they can be used as laser matrix materials. For laser crystals, the thermal conductivity is closely related to the optical damage threshold of the crystal, and the large thermal conductivity can be Improve the optical damage threshold of the crystal, increase the pump power, and thus increase the output power, so the rare earth oxide crystal doped with activated ions can be used for high power output. In addition to hav...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B13/00
Inventor 张怀金武奎郝良振于浩海王继扬
Owner SHANDONG UNIV
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