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Indium-chromium-neodymium tri-doped lithium niobate crystal and preparation method thereof

A technology of triple doping and lithium niobate, which is applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of limited application and low light damage ability, and achieve improved luminescence performance and increased light damage resistance , Improving the effect of resisting light damage threshold

Inactive Publication Date: 2019-09-13
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the luminescent ion-doped lithium niobate crystal has good optical properties, the intrinsic defects and extrinsic defects in the interior lead to its low optical damage ability, which limits the application of lithium niobate crystal as lasers and amplifiers.

Method used

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  • Indium-chromium-neodymium tri-doped lithium niobate crystal and preparation method thereof
  • Indium-chromium-neodymium tri-doped lithium niobate crystal and preparation method thereof
  • Indium-chromium-neodymium tri-doped lithium niobate crystal and preparation method thereof

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Embodiment

[0022] 1) The intermediate frequency heating furnace used for growing indium chromium neodymium three-doped lithium niobate crystal in the present invention includes: furnace body 1, heat preservation cover 2, seed rod 3, quartz observation window 4, thermocouple 5, heat preservation platinum sheet 6, platinum Crucible 7, heat insulating sand 8, heating coil 9 and cooling water 10. Wherein the seed rod 3 is used to fix the seed crystal 12, and the centers of the seed rod 3, the seed crystal 12 and the platinum crucible 7 should be adjusted on a straight line to ensure that the crystal 13 grows evenly along the seed crystal 12 before crystal growth . The heat preservation sand 8 not only has the function of heat preservation but also can be used to adjust the height of the platinum crucible 7 . The thermocouple 5 is used to monitor the temperature in the furnace;

[0023] 2) Preliminary preparation: Weigh Nb with a purity greater than 99.99% 2 o 5 , Li 2 CO 3 、In 2 o 3 ...

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Abstract

The invention belongs to the field of optical crystal materials, and particularly relates to an indium-chromium-neodymium tri-doped lithium niobate crystal and a preparation method thereof. The crystal is grown by adopting a Czochralski method and is characterized by being prepared from five raw materials comprising Nb2O5, Li2CO3, In2O3, Cr2O3 and Nd2O3, wherein the concentrations of the Nb2O5, Li2CO3, In2O3, Cr2O3 and Nd2O3 are respectively 50.79 mol%, 48.05 mol%, 1 mol%, 0.15 mol% and 0.01 mol%. The prepared indium-chromium-neodymium tri-doped lithium niobate crystal is high in glossiness and is free of cracks, has high absorption intensity at 670 nm, can be excited by a pump light source with a wavelength of 670 nm, is matched well with a laser commercial diode, and is relatively high in light damage resistance. The indium-chromium-neodymium tri-doped lithium niobate crystal has important application values in the fields of luminescence display, solar cells, solid lasers, anti-Stokes refrigeration and the like.

Description

technical field [0001] The invention belongs to the field of optical crystal materials, and in particular relates to an indium chromium neodymium three-doped lithium niobate crystal and a preparation method thereof. Background technique [0002] Lithium niobate crystal is the artificial crystal with the best comprehensive performance found so far. It has stable physical and chemical properties, high temperature resistance, corrosion resistance and excellent photoelectric, acousto-optic, and optical nonlinear properties. Due to the lack of Li in the lithium niobate crystal grown at the same composition point of solid and liquid, there are a large number of intrinsic defects inside the crystal, which makes it easy for dopant ions to enter the crystal by replacing the intrinsic defects. After doping ions, the crystal has both the advantages of doped ions and lithium niobate crystals, and is widely used in sensors, holographic storage, optical switches, acousto-optic devices, op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B15/00C30B15/14
CPCC30B15/00C30B15/14C30B29/30
Inventor 代丽刘春蕊韩县博邵瑀
Owner HARBIN UNIV OF SCI & TECH
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