Yttrium-doped lithium niobate crystal and preparation method thereof

A technology of lithium yttrium niobate and lithium niobate, which is 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, and difficulty in growing high-quality crystals, achieving the goal of doping Low heterothreshold, strong photorefractive resistance, and easy growth

Active Publication Date: 2013-03-13
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 0.5 mol% of the total amount of Y 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ] = 1.41 material. at 150 ℃ Dry the powder at a constant temperature for 2 hours, then fully mix it on the mixer for 24 hours, at 850 ℃ Constant temperature for 2 hours, make Li 2 CO 3 fully decomposed, at 1100 ℃ Calcined 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 Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to the processes of pulling neck, shouldering, equal diameter, and finishing. Pulling speed 0.4mm / h, rotating speed 18rpm, air-liquid temperature difference 30 ℃ , the temperature gradient in the melt is 1.5 ℃ / mm, the temperature gradient above the melt is 1.0 ℃ / mm. (3) The grown crystal is at 1150 ℃ After monodomainization, annealing, orientation, cutting, grinding and po...

Embodiment 2

[0020] Weigh 1.0 mol% of the total amount of Y 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ] = 1.20 material. at 150 ℃ Dry the powder at a constant temperature for 2 hours, then fully mix it on the mixer for 24 hours, at 850 ℃ Constant temperature for 2 hours, make Li 2 CO 3 fully decomposed, at 1200 ℃ Calcined 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 Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to the processes of pulling neck, shouldering, equal diameter, and finishing. Pulling speed 1mm / h, rotating speed 14rpm, gas-liquid temperature difference 30 ℃ , the temperature gradient in the melt is 1.5 ℃ / mm, the temperature gradient above the melt is 1.0 ℃ / mm. (3) The grown crystal is at 1200 ℃ After monodomainization, annealing, orientation, cutting, grinding and poli...

Embodiment 3

[0022] Weigh 2.0 mol% of the total amount of Y 2 o 3 and molar ratio [Li 2 CO 3 ] / [Nb 2 o 5 ] = 1.00 feed. at 150 ℃ Dry the powder at a constant temperature for 2 hours, then fully mix it on the mixer for 24 hours, at 850 ℃ Constant temperature for 2 hours, make Li 2 CO 3 fully decomposed, at 1100 ℃ Calcined 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 Czochralski pulling method is used to grow mono-doped lithium niobate crystals along the c-axis direction according to the processes of pulling neck, shouldering, equal diameter, and finishing. Pulling speed 1mm / h, rotating speed 14rpm, gas-liquid temperature difference 30 ℃ , the temperature gradient in the melt is 1.5 ℃ / mm, the temperature gradient above the melt is 1.0 ℃ / mm. (3) The grown crystal is at 1150 ℃ After monodomainization, annealing, orientation, cutting, grinding and polishin...

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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 obvio...

Claims

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Application Information

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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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