Preparation method and application of lithium vanadate nonlinear optical crystal

A technology of nonlinear optics and lithium vanadate, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as no single crystal, and achieve the effects of simple operation, fast growth speed, and short growth cycle

Inactive Publication Date: 2015-12-09
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, we have not seen the preparation of Li with a size sufficient for physical property testing. 3 VO 4 Single crystals are reported, and there is no report on Li 3 VO 4 The repor

Method used

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  • Preparation method and application of lithium vanadate nonlinear optical crystal

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0031] Example 1:

[0032] Take reaction formula (1) as an example, but not limited to reaction formula (1):

[0033] Using high temperature solid phase method, with reaction formula 3Li 2 CO 3 +V 2 O 5 →2Li 3 VO 4 +3CO 2 -

[0034] Synthesis of lithium vanadate (Li 3 VO 4 ) Compound: Li 2 CO 3 , V 2 O 5 Put it into a mortar according to the stoichiometric ratio of 3:1, mix and grind it carefully, then put it into an open corundum crucible of Φ100mm×100mm, press it tightly, put it into a muffle furnace, and slowly raise the temperature to 400℃, constant temperature 10 After cooling, take out the crucible, take out the sample and grind it evenly, then place it in the crucible and keep it in the muffle furnace at a temperature of 550°C for 48 hours. Take it out and place it in a mortar to grind to obtain the lithium vanadate compound. Perform X-ray analysis on the product, and the obtained X-ray spectrum is consistent with the reported results;

[0035] a. Combine lithium vanadate poly...

Example Embodiment

[0040] Example 2:

[0041] Take reaction formula (2) as an example, but not limited to reaction formula (2):

[0042] Using high temperature solid phase method, with reaction formula 6LiOH+V 2 O 5 →2Li 3 VO 4 +3H 2 O-

[0043] Synthesis of lithium vanadate (Li 3 VO 4 ) Compound, the specific operation steps are carried out according to Example 1;

[0044] Li to be synthesized 3 VO 4 Compound and flux PbF 2 Mix according to a molar ratio of 1:2, put it into an open platinum crucible of Φ60mm×60mm, raise the temperature to 530°C, and cool it down to 450°C after 60 hours of constant temperature to obtain a mixed melt of lithium vanadate and flux;

[0045] The seed crystal obtained in step b of Example 1 was tied to the lower end of the seed rod with platinum wire, and the seed crystal was introduced from the small hole on the top of the furnace to a distance of about 1-2 cm from the crucible, kept at a constant temperature for 20 minutes, and then immersed below the liquid level of the mix...

Example Embodiment

[0048] Example 3:

[0049] Take reaction formula (3) as an example, but not limited to reaction formula (3):

[0050] Using high temperature solid phase method, with reaction formula 6LiNO 3 +V 2 O 5 →2Li 3 VO 4 +3NO-+3NO 2 -+3O 2 -Synthetic lithium vanadate (Li 3 VO 4 ) Compound, the specific operation steps are carried out according to Example 1;

[0051] Li to be synthesized 3 VO 4 Compound and flux PbF 2 Mix according to a molar ratio of 1:3, put it into an open platinum crucible of Φ70mm×70mm, raise the temperature to 450°C, and then cool it down to 380°C after 1 hour at a constant temperature to obtain a mixed melt of lithium vanadate and flux;

[0052] The seed crystal obtained in step b of Example 1 was tied to the lower end of the seed rod with platinum wire, and the seed crystal was introduced into the crucible from the small hole on the top of the furnace about 1-2 cm away from the crucible, kept at a constant temperature for 5 minutes, and then immersed below the liquid lev...

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Abstract

The invention relates to a large-size lithium vanadate nonlinear optical crystal and a preparation method and application thereof. A high-temperature solution method is adopted for the crystal, a fluxing agent PbF2 is adopted for growing the crystal, and the nonlinear optical effect is about 8 times that of KDP (KH2PO4). The crystal has the advantages of being moderate in mechanical strength, easy to machine, not prone to air-slaking, fast and easy to prepare, low in cost, large in size and the like, is suitable for manufacturing nonlinear optical devices and can be widely applied to infrequency-doubling conversion nonlinear optical devices and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a lithium vanadate nonlinear optical crystal, in particular to growing the crystal by a high-temperature melt method. Background technique [0002] Mid-infrared coherent light sources are widely used in military fields, such as laser infrared countermeasures, laser communication, infrared remote sensing, laser guidance, laser aiming, etc.; and in civilian fields such as detection of trace pollutants in the environment, biology, medicine, etc. . Although carbon dioxide lasers, deuterium fluoride chemical lasers, and solid-state lasers doped with transition metal or rare earth metal ions can produce mid- and far-infrared lasers, compared with the above-mentioned methods, the use of infrared nonlinear optical crystals for visible or near-infrared lasers at lower frequencies It has a wide tunable range in the production of mid- and far-infrared lasers. The laser can be miniaturized, compact,...

Claims

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Application Information

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IPC IPC(8): C30B29/30C30B9/12G02F1/355
Inventor 陈兆慧潘世烈李弘毅
Owner XINJIANG UNIVERSITY
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