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Double-doped lithium niobate crystal and preparation method thereof

A lithium niobate and crystal technology, which is applied in the field of double-doped lithium niobate crystal and its preparation, can solve the problems of being easily affected by temperature, low power of short-wavelength laser, and difficult to achieve high power output, etc. The effect of uniform distribution of impurity ions

Inactive Publication Date: 2012-01-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth-doped lithium niobate crystals can achieve short-wavelength laser output through nonlinear frequency conversion or up-conversion, and can be used as solid-state lasers. However, nonlinear frequency conversion requires phase matching constraints and is susceptible to temperature effects.
However, the short-wavelength laser power generated by up-conversion is low, and it is difficult to achieve high power output

Method used

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  • Double-doped lithium niobate crystal and preparation method thereof
  • Double-doped lithium niobate crystal and preparation method thereof
  • Double-doped lithium niobate crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take X=0.15, Y=5, namely Sm 2 O 3 It is 0.15mol%, MgO is 5mol%, Sm is grown automatically by pulling method x Mg y (Li 0.946 NbO 3 ) 100-x-y (0.15≤x≤0.3, 5≤y≤8) single crystal.

[0031] 1. Sm co-doped with rare earth Sm and anti-photorefractive ion Mg x Mg y (Li 0.946 NbO 3 ) 100-x-y Polycrystalline preparation

[0032] Weigh 0.15mol% Sm according to the mole percentage 2 O 3 , 5mol% MgO, 46.02mol% Li 2 CO 3 , 48.68mol% Nb 2 O 5 , Sm to be weighed 2 O 3 , MgO, Li 2 CO 3 And Nb 2 O 5 Put them into a container and mix them evenly, then use a tablet press to press each into a solid block, put it into a platinum crucible, calcine at 760°C for 4 hours, and then sinter at 1150°C for 7 hours, and solid-phase reaction takes place to produce Sm x Mg y (Li 0.946 NbO 3 ) 100-x-y Polycrystalline.

[0033] 2. Sm co-doped with rare earth Sm and anti-photorefractive ion Mg x Mg y (Li 0.946 NbO 3 ) 100-x-y Single crystal growth

[0034] Sm produced x Mg y (Li 0.946 NbO 3 ) 100-x-y The polycryst...

Embodiment 2

[0042] Take X=0.15, Z=6.5, namely Sm 2 O 3 Is 0.15 mol%, ZnO is 6.5 mol%, Sm is grown automatically by the pulling method x Zn y (Li 0.946 NbO 3 ) 100-x-y (0.15≤x≤0.3, 6≤y≤7) single crystal.

[0043] Weigh 0.15mol% Sm according to the mole percentage 2 O 3 , 6.5mol% ZnO, 45.30mol% Li 2 CO 3 , 47.90mol% Nb 2 O 5 , Sm to be weighed 2 O 3 , ZnO, Li 2 CO 3 And Nb 2 O 5 Put them into a container and mix them evenly, then use a tablet press to press each into a solid block, put it into a platinum crucible, calcine at 760°C for 4 hours, and then sinter at 1150°C for 6 hours. A solid phase reaction occurs to obtain Sm:Zn: LiNbO 3 Polycrystalline.

[0044] In the process of growing the single crystal, the selection of parameters is the same as in the first embodiment. Sm grown in this example x Zn y (Li 0.946 NbO 3 ) 100-x-y The length of the single crystal is 25mm and the diameter is 20mm. Test its polarization absorption spectrum and fluorescence spectrum. The measured spectrum is as foll...

Embodiment 3

[0046] Take X=0.2, Y=5, namely Sm 2 O 3 0.2mol%, MgO is 5mol%, Sm is grown automatically by pulling method x Mg y (Li 0.946 NbO 3 ) 100-x-y Single crystal.

[0047] Weigh 0.2mol% Sm according to the mole percentage 2 O 3 , 5mol% MgO, 45.98mol% Li 2 CO 3 , 48.62mol% Nb 2 O 5 , Sm to be weighed 2 O 3 , MgO, Li 2 CO 3 And Nb 2 O 5 Put them into a container and mix them evenly, then use a tablet press to press each into a solid block, put it into a platinum crucible, calcine at 760°C for 4 hours, and then sinter at 1150°C for 7 hours, and solid-phase reaction takes place to produce Sm x Mg y (Li 0.946 NbO 3 ) 100-x-y Polycrystalline.

[0048] In the process of growing the single crystal, the selection of parameters is the same as in the first embodiment. The quality of the single crystal grown in this embodiment is uniform without obvious growth streaks.

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Abstract

The invention relates to the technical field of photoelectric crystals, and especially relates to a double-doped lithium niobate crystal which comprises SmxMy(Li0.946NbO3)100-x-y, wherein M is one of Mg and Zn; 0.15<=x<=0.3; when M is Mg, 5<=y<=8; when M is Zn, 6<=y<=7. In the double-doped lithium niobate crystal of the invention, rare earth ion samarium Sm adopts lithium niobate doped with photorefraction-resistant ion Mg or Zn as a substrate, not only has high photo damage resistance, but also realizes short-wavelength orange red light output; with the excitation of ultraviolet light, Sm realizes the output of orange red light of 606 nm and 613 nm within a visible light wave band directly in a down-conversion manner, realizes the high-power output of orange red visible light. The invention also relates to a preparation method of the double-doped lithium niobate crystal, and the prepared high-quality double-doped lithium niobate crystal has no macroscopic defect, no obvious growth striation, and uniform distribution of the doped ions.

Description

Technical field [0001] The invention involves the field of photoelectric crystal technology, especially a dual -doped lithium -doped lithium crystal and its preparation methods. Background technique [0002] At present, the optical folding material that is most suitable for the three -dimensional holographic memory into a large -capacity is lithium crystalline crystal. It is one of the most widely used artificial crystal materials.With non -linear optics and other properties, it has an important position in applications such as holographic optical storage, optical wave organizers, and integrated optics.Most of the lithium crystal materials are composed of the same ingredients, and their total manifestations are lack of lithium. Due to the severe lack of lithium in the crystal, a large number of structural defects are formed, so that the application of lithium crickets crystal as a light folding crystal is affected by holographic storage in holographic storage.Very limited.Because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B15/00
Inventor 王彪王云华
Owner SUN YAT SEN UNIV
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