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Yttrium-doped lithium niobate crystal and preparation method thereof

A technology of yttrium lithium niobate and lithium niobate, applied in the field of nonlinear optical crystals, can solve the problems of high doping threshold concentration, effective segregation coefficient not equal to 1.0, difficult to grow high optical quality crystals, etc. The effect of low impurity threshold, strong photorefractive resistance, and easy growth

Active Publication Date: 2016-05-11
TAISHAN SPORTS IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious shortcomings in magnesium-doped lithium niobate crystals, that is, the doping threshold concentration is high, the effective segregation coefficient is not equal to 1.0, and it is difficult to grow crystals with high optical quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.5mol% of Y that accounts for the amount of total substance 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ]=1.41 material. Dry the powder at a constant temperature of 150°C for 2 hours, then fully mix it on a mixer for 24 hours, and keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose and calcined at 1100°C for 12 hours to form double-doped lithium niobate powder. (2) The powder is compacted, placed in a platinum crucible, heated with an intermediate frequency furnace, and the Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to processes such as necking, shouldering, equal diameter, and finishing. The casting speed is 0.4mm / h, the rotating speed is 18rpm, the gas-liquid temperature difference is 30°C, the temperature gradient inside the melt is 1.5°C / mm, and the temperature gradient above the melt is 1.0°C / mm. (3) The grown crystal is monodomainized and annealed at 11...

Embodiment 2

[0020] Weigh 1.0mol% of Y that accounts for the amount of the total substance 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ]=1.20 material. Dry the powder at a constant temperature of 150°C for 2 hours, then fully mix it on a mixer for 24 hours, and keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose and calcined at 1200°C for 12 hours to form double-doped lithium niobate powder. (2) The powder is compacted, placed in a platinum crucible, heated with an intermediate frequency furnace, and the Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to processes such as necking, shouldering, equal diameter, and finishing. The casting speed is 1mm / h, the rotational speed is 14rpm, the temperature difference between gas and liquid is 30°C, the temperature gradient inside the melt is 1.5°C / mm, and the temperature gradient above the melt is 1.0°C / mm. (3) The grown crystals are monodomainized ...

Embodiment 3

[0022] Weigh 2.0mol% of Y that accounts for the amount of the total substance 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ]=1.00 material. Dry the powder at a constant temperature of 150°C for 2 hours, then fully mix it on a mixer for 24 hours, and keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose and calcined at 1100°C for 12 hours to form double-doped lithium niobate powder. (2) The powder is compacted, placed in a platinum crucible, heated with an intermediate frequency furnace, and the Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to processes such as necking, shouldering, equal diameter, and finishing. The casting speed is 1mm / h, the rotational speed is 14rpm, the temperature difference between gas and liquid is 30°C, the temperature gradient inside the melt is 1.5°C / mm, and the temperature gradient above the melt is 1.0°C / mm. (3) The grown crystals are monodomainized ...

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PUM

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Abstract

The invention belongs to the technical field of non-linear optical crystal, and relates to a yttrium-doped lithium niobate crystal which is characterized in that tin ion Y<3+> is doped into lithium niobate, and the molar ratio [Li] / [Nb] is 0.93-1.41, and the mole percentage of the doped amount of Y<3+> is 0.5-6.0%. The yttrium-doped lithium niobate crystal provided by the invention has the advantages of low doping threshold, strong photorefraction resistance and the like, is easy to grow, can replace the application of high magnesium-doped lithium niobate crystal, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of nonlinear optical crystals, and relates to a yttrium-doped lithium niobate crystal and a preparation method thereof. Background technique [0002] Lithium niobate (LiNbO 3 ) crystal is a versatile and versatile optoelectronic material. An important characteristic of lithium niobate crystals is optical damage. On the one hand, it opens up the application of crystals in holographic storage and optical amplification, but at the same time it limits its applications in frequency conversion, Q-switching, parametric oscillation, and optical waveguides. application. Doping certain impurity ions in lithium niobate crystals is an effective means to improve the photorefractive resistance of lithium niobate crystals, such as Mg 2+ ,Zn 2+ ,Sc 3+ ,In 3+ Among them, the most widely used is the doping of Mg in the lithium niobate crystal 2+ . However, magnesium-doped lithium niobate crystals have obvious shortcom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/30
Inventor 孔勇发李昕睿刘宏德徐培明
Owner TAISHAN SPORTS IND GRP
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