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Preparation method of erbium-doped calcium yttrium aluminate laser crystal

A laser crystal, yttrium aluminate technology, used in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of complex laser structure and limited applications, and achieve large size, high crystal optical quality, physical and chemical properties. good performance

Inactive Publication Date: 2012-12-19
SHANGHAI BASFORM POWER ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commercialized femtosecond lasers are mostly mode-locked Ti:sapphire lasers, but since the absorption spectrum of Ti:sapphire lies in the visible light range, a 515nm argon ion laser or a 532nm green laser is usually used as the pump source, which makes the laser structure complex and limited its wider application

Method used

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  • Preparation method of erbium-doped calcium yttrium aluminate laser crystal
  • Preparation method of erbium-doped calcium yttrium aluminate laser crystal
  • Preparation method of erbium-doped calcium yttrium aluminate laser crystal

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Embodiment 1

[0030] Select x=0.01, set Er 2 o 3 , Y 2 o 3 , Al 2 o 3 and CaCO 3 The high-purity raw materials were weighed according to the ratio of 0.01:0.99:1:2, and the reagents were weighed and mixed thoroughly, and then pressed into a tablet with a plexiglass mold on a hydraulic press, and then put into an alumina crucible and placed in a muffle furnace. Sintered to Er:CaYAlO 4 Polycrystalline block material, then take out the block material and put it into the iridium gold crucible and place it in the pulling furnace, adopt the pulling method to grow the crystal, and use the iridium gold wire as the seed crystal for the first growth and put it into the seed crystal clip (the crystal used for growing the crystal species), put them into the furnace together, draw a low vacuum in a high-purity nitrogen atmosphere, use medium-frequency induction to heat the iridium crucible, melt the polycrystalline raw material in the crucible, and heat it at a temperature about 80°C higher than t...

Embodiment 2

[0032] Select x=0.004, set Er 2 o 3 , Y 2 o 3 , Al 2 o 3 and CaCO 3 The high-purity raw materials were weighed according to the ratio of 0.004:0.996:1:2, and the reagents were weighed respectively, mixed thoroughly and uniformly, and then pressed into a tablet on a hydraulic press, then put into an alumina crucible and placed in a muffle furnace, and sintered at 1400°C to form Er: CaYAlO 4 Polycrystalline block material, then take out the block material and put it into the iridium gold crucible and place it in the pulling furnace, and use the pulling method to grow the crystal. The seed crystal is precisely oriented by the X-ray diffractometer. %Er:CaYAlO 4 Single crystal rod. The crystals were grown by the pulling method in a high-purity nitrogen atmosphere with low vacuum. The growth parameters are as shown in Example 2 in Table 1. After the crystal is pulled off, oxygen is filled, and then slowly lowered to room temperature. The last removed 0.4% Er:CaYAlO 4 The ...

Embodiment 3

[0034] Select x=0.006, set Er 2 o 3 , Y 2 o 3 , Al 2 o 3 and CaCO 3 High-purity raw materials were weighed according to the ratio of 0.006:0.994:1:2, and the reagents were weighed respectively, mixed thoroughly, pressed into a tablet on a hydraulic press, then put into an alumina crucible and placed in a muffle furnace, and sintered at 1400°C to form Er: CaYAlO 4 Polycrystalline block material, then take out the block material and put it into the iridium gold crucible and place it in the pulling furnace, and use the pulling method to grow the crystal. The seed crystal is precisely oriented by the X-ray diffractometer. %Er:CaYAlO 4 Single crystal rod. The crystals were grown by the pulling method in a high-purity nitrogen atmosphere with low vacuum. The growth parameters are as shown in Example 3 in Table 1. After the crystal is pulled off, oxygen is filled, and then slowly lowered to room temperature. The last 0.6% Er:CaYAlO removed 4 The single crystal is transpare...

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Abstract

A preparation method of erbium-doped calcium yttrium aluminate laser crystal comprises the steps of: burdening according to the molar ratio of raw materials Er2O3 to Y2O3 to Al2O3 to CaCO3 being x:(1-x):1:2, wherein x is 0.003-0.015; placing in a mortar, mixing and grinding, pressing into sheets by a hydraulic press, and sintering at 1400 DEG C to synthesize a polycrystal lump material; and taking the polycrystal lump material obtained in the former step, placing in an iraurite crucible, placing in a Czochralski furnace, and growing Er:CaYAlO4 single crystal by adopting a Czochralski method. The grown Er:CaYAlO4 single crystal has larger size, high crystal optical quality, integrity and no cracking, better physical and chemical performances, and inhomogeneous broadening of absorption and emission spectra, can be used for realizing femtosecond mode-locked laser output and is an excellent luminescent host crystal material.

Description

technical field [0001] The present invention relates to the field of crystal growth, in particular to a kind of Er:CaYAlO 4 A pulling method for growing laser crystals. Specifically, it is to use the pulling method to grow Er:CaYAlO with large size and high optical quality. 4 laser crystals. Background technique [0002] In 1981, the world's first femtosecond dye laser came out, and the development of ultrafast lasers entered the femtosecond (10 -15 s) stage, resulting in femtosecond laser technology and science. This has a wide range of applications in ultrafast time-resolved spectroscopy, microelectronics processing, optical clocks, metrology, holography, high-capacity optical communications, and many other fields. Currently commercialized femtosecond lasers are mostly mode-locked Ti:sapphire lasers, but since the absorption spectrum of Ti:sapphire lies in the visible light range, a 515nm argon ion laser or a 532nm green laser is usually used as the pump source, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B15/00
Inventor 陈辉宇周崇岭
Owner SHANGHAI BASFORM POWER ELECTRIC