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Ytterbium and holmium codoped lithium niobate crystals and preparation method thereof

A lithium niobate and crystal technology is applied in the field of doped lithium niobate crystal and its preparation, which can solve the problem that lithium niobate cannot be used as a laser crystal material, and achieves good green light monochromaticity and wide application prospects. , Improve the effect of fluorescence characteristics

Inactive Publication Date: 2011-07-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that the existing lithium niobate crystal cannot be used as a laser crystal material, and provides ytterbium holmium double-doped lithium niobate crystal and its preparation method

Method used

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  • Ytterbium and holmium codoped lithium niobate crystals and preparation method thereof
  • Ytterbium and holmium codoped lithium niobate crystals and preparation method thereof
  • Ytterbium and holmium codoped lithium niobate crystals and preparation method thereof

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specific Embodiment approach 1

[0010] Specific embodiment one: the ytterbium holmium double-doped lithium niobate crystal of the present embodiment is made of niobium pentoxide, lithium carbonate, ytterbium oxide and holmium oxide; wherein the molar ratio of lithium carbonate to niobium pentoxide is 0.946:1 The amount of holmium oxide is 0.1mol% of the sum of the amount of niobium pentoxide, lithium carbonate, ytterbium oxide and holmium oxide, and the amount of ytterbium oxide is niobium pentoxide, lithium carbonate, ytterbium oxide and oxide 2.0% to 2.5% of the sum of the amounts of holmium substances.

[0011] The ytterbium-holmium double-doped lithium niobate crystal of this embodiment adopts lithium niobate as a matrix, and is doped with holmium oxide and ytterbium oxide, wherein the Ho 3+ There is an energy level structure that is prone to upconversion, as a laser-activated ion in the ytterbium-holmium double-doped lithium niobate crystal, due to the Ho 3+ Does not match the 980nm energy level, the r...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the amount of ytterbium oxide is 2.1% to 2.4% of the sum of the amount of niobium pentoxide, lithium carbonate, ytterbium oxide and holmium oxide. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that the amount of ytterbium oxide is 2.3% of the sum of the amount of niobium pentoxide, lithium carbonate, ytterbium oxide and holmium oxide. Others are the same as in the first embodiment.

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Abstract

The invention discloses ytterbium and holmium codoped lithium niobate crystals and a preparation method thereof, and relates to doped lithium niobate crystals and a preparation method thereof, which solve the technical problems that the conventional lithium niobate crystals cannot be used as a laser crystal material. The ytterbium and holmium codoped lithium niobate crystals are prepared from niobium pentaoxide, lithium carbonate, ytterbium oxide and holmium oxide. The method comprises the following steps of: mixing the niobium pentaoxide, the lithium carbonate, the ytterbium oxide and the holmium oxide and baking to obtain polycrystal powder; growing crystals at equal diameter from the polycrystal powder in a single crystal growth furnace through seeding, necking, shouldering and folding by a crystal pulling method; and annealing to obtain the ytterbium and holmium codoped lithium niobate crystals. The ytterbium and holmium codoped lithium niobate crystals can emit red light and green light when activated by laser of 980nm and has a broad application prospect in the fields of optical data storage, submarine communication, optical display, color display, photoelectrons, medical diagnosis and the like.

Description

technical field [0001] The invention relates to a doped lithium niobate crystal and a preparation method thereof. Background technique [0002] Lithium niobate (LiNbO 3 ) single crystal is a crystalline material that combines piezoelectric, electro-optic, acousto-optic, photoelastic, photorefractive, pyroelectric, ferroelectric and laser active effects. After different doping, it can present a variety of The special performance makes it widely used in surface acoustic wave filters, optical waveguides, electro-optic modulators, frequency conversion, spectrum analysis, holographic storage and many other aspects. For a long time, people hope to combine nonlinear and laser properties well to obtain composite functional crystal materials. Lithium niobate crystal is a nonlinear optical crystal material with excellent performance and has a large nonlinear coefficient. However, the excellent The non-linear optical crystals cannot provide activated ions with lattice sites that can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B15/00
Inventor 王锐郭倩钱艳楠邢丽丽
Owner HARBIN INST OF TECH
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