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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 report of the test results of the nonlinear optical properties of single crystals or Li 3 VO 4 A report on the use of single crystals in the fabrication of infrared nonlinear optical devices

Method used

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  • Preparation method and application of lithium vanadate nonlinear optical crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0033] Using the high-temperature solid-phase method, the reaction formula 3Li 2 CO 3 +V 2 o5 →2Li 3 VO 4 +3CO 2 -

[0034] Lithium vanadate (Li 3 VO 4 ) compound: the 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 a corundum crucible with an opening of Φ100mm×100mm, press it tightly, put it into a muffle furnace, and slowly raise the temperature to 400°C, constant temperature 10 hours, take out the crucible after cooling, take out the sample and re-grind evenly, then put it in the crucible, keep the temperature in the muffle furnace at 550°C for 48 hours, take it out, put it into the mortar and grind it to get the lithium vanadate compound, Carry out X-ray analysis to this product, the obtained X-ray spectrogram is consistent with the reported result;

[0035] a. The lithium vanadate polycr...

Embodiment 2

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

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

[0043] Lithium vanadate (Li 3 VO 4 ) compound, the specific operation steps are carried out according to Example 1;

[0044] The synthesized Li 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, keep the temperature for 60 hours and then cool down to 450°C to obtain a mixed melt of lithium vanadate and flux;

[0045] Bind the seed crystal obtained in step b of Example 1 to the lower end of the seed rod with a platinum wire, introduce the seed crystal into a place about 1-2 cm away from the crucible through a small hole on the top of the furnace, keep the temperature at a constant temperature for 20 minutes, and then immerse it below the liquid level of the mixed mel...

Embodiment 3

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

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

[0051] The synthesized Li 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, heat up to 450°C, keep the temperature for 1 hour and then cool down to 380°C to obtain a mixed melt of lithium vanadate and flux;

[0052] Bind the seed crystal obtained in Step b of Example 1 to the lower end of the seed rod with a platinum wire, introduce the seed crystal into a place about 1-2 cm away from the crucible through a small hole on the top of the furnace, keep the temperature at a constant temperature for 5 minutes, and then immerse it below the liquid level of the mixed m...

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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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