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Bismuth-magnesium double-doped lithium niobate crystal

A lithium niobate and crystal technology is applied in the field of bismuth-magnesium double-doped lithium niobate crystals to achieve the effects of enhanced photorefractive effect, enhanced photorefractive sensitivity, and shortened saturation writing time.

Inactive Publication Date: 2016-06-01
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the consistency between photorefraction and photodamage, there is currently no report that can improve the photorefractive properties of lithium niobate crystals and improve their anti-photodamage properties.

Method used

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  • Bismuth-magnesium double-doped lithium niobate crystal
  • Bismuth-magnesium double-doped lithium niobate crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1) Weigh Li with a purity of 99.99% 2 CO 3 , Nb 2 o 5 、 Bi 2 o 3 and MgO for batching, where the molar ratio of [Li] to [Nb] is 0.90, Bi 2 o 3 The doping amount of MgO is 0.25 mol%, the doping amount of MgO is 3.0 mol%, fully grind and mix at 300r / min on the star ball mill for 2 hours, and then keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose, calcined at 1150 ° C for 6 hours, so that the mixture can fully undergo a solid-state reaction, and the bismuth-magnesium double-doped lithium niobate powder can be prepared;

[0012] 2) Compact the powder prepared above, put it in a platinum crucible, use medium frequency induction heating, and grow bismuth along the C-axis direction by the Czochralski pulling method according to the program steps of seeding, neck pulling, shouldering, equal diameter, and finishing Magnesium double-doped lithium niobate crystal, the process parameters are: casting speed 1mm / h, rotating speed 8r / min, temperature ...

Embodiment 2

[0016] 1) Weigh Li with a purity of 99.99% 2 CO 3 , Nb 2 o 5 、 Bi 2 o 3 Dosing with MgO, wherein the molar ratio of [Li] to [Nb] is 0.94, Bi 2 o 3 The content of MgO is 0.5mol%, the content of MgO is 5.0mol%, fully grind and mix for 2 hours with 300r / min on the planetary ball mill, and then keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose, calcined at 1150 ° C for 6 hours, so that the mixture can fully undergo a solid-state reaction, and the bismuth-magnesium double-doped lithium niobate powder can be prepared;

[0017] 2) Compact the powder prepared above, put it in a platinum crucible, use intermediate frequency induction heating, and use Czochralski pulling method to grow along the C-axis direction according to the program steps of seeding, neck pulling, shouldering, equal diameter, and finishing Bismuth-magnesium double-doped lithium niobate crystal, the process parameters are: casting speed 1mm / h, rotation speed 8r / min, temperature gradi...

Embodiment 3

[0021] 1) Weigh Li with a purity of 99.99% 2 CO 3 , Nb 2 o 5 、 Bi 2 o 3 Dosing with MgO, wherein the molar ratio of [Li] to [Nb] is 1.00, Bi 2 o 3 The content of MgO is 0.5mol%, and the content of MgO is 6.0mol%, fully grind and mix for 2 hours with 300r / min on the planetary ball mill, and then keep the temperature at 850°C for 2 hours to make Li 2 CO 3 Fully decompose, calcined at 1150 ° C for 6 hours, so that the mixture can fully undergo a solid-state reaction, and the bismuth-magnesium double-doped lithium niobate powder can be prepared;

[0022] 2) Compact the powder prepared above, put it in a platinum crucible, use medium frequency induction heating, and grow bismuth along the C-axis direction by the Czochralski pulling method according to the program steps of seeding, neck pulling, shouldering, equal diameter, and finishing Magnesium double-doped lithium niobate crystal; process parameters: casting speed 1mm / h, rotation speed 8r / min, temperature gradient inside...

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Abstract

The invention belongs to the technical field of non-linear optical crystals and relates to a bismuth-magnesium double-doped lithium niobate crystal. The bismuth-magnesium double-doped lithium niobate crystal is characterized in that Bi2O3 and MgO are doped in a lithium niobate crystal at the same time, wherein the molar ratio of [Li] to [Nb] is 0.90 to 1.00. The doping amount of Bi2O3 is 0.25 mol% to 1.00 mol%, and the doping amount of MgO is 3.00 mol% to 9.00 mol%. The photo refraction effect of the bismuth-magnesium double-doped lithium niobate crystal is enhanced, and sensitivity is improved. Meanwhile, optical damage resistance capacity is remarkably improved, and growth is easy. The crystal can be applied to the fields of laser frequency conversion, parametric oscillation, q switching, electro-optical modulation, holographic storage, holographic display and the like.

Description

【Technical field】 [0001] The invention belongs to the field of nonlinear optical crystals, in particular to a bismuth-magnesium double-doped lithium niobate crystal. 【Background technique】 [0002] Lithium niobate (LiNbO 3 ) crystal is a multifunctional, multipurpose optoelectronic material. Improving the photorefractive effect of the crystal can promote the application of the crystal in the fields of holographic storage and optical amplification, and improving the anti-photodamage threshold of the crystal can promote its application in the fields of frequency conversion, Q-switching, parametric oscillation, and optical waveguide. Ion doping can effectively change the nonlinear optical properties of lithium niobate crystals. Generally speaking, the doping ions of lithium niobate crystals can be divided into two categories: one kind such as Fe, Cu, Mn, Ni, Mo, Ce plasma can Enhance the photorefractive effect of lithium niobate crystal; another type such as Mg, Zn, Sc, In pl...

Claims

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Application Information

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IPC IPC(8): C30B29/30C30B15/00G02F1/03G02F2/02
CPCC30B15/00C30B29/30G02F1/03G02F2/02C01G33/00C01G33/006C01P2002/52C01P2006/80C30B15/203C30B33/02C30B15/10C30B15/14C04B35/495G02F1/3551G02F1/0018C04B2235/3203C04B2235/3255C04B2235/3298C04B2235/3206G02F2202/20C30B15/30C04B35/6261C04B35/62675C04B2235/604C04B2235/656C04B2235/9646
Inventor 孔勇发郑大怀刘士国许京军徐培明卞志勇陈绍林张玲刘宏德
Owner NANKAI UNIV
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