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Potassium borate lutetium nonlinear optical crystal and its preparation method and application

A nonlinear optics, potassium borate technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., to achieve the effects of low cost, fast growth, and simple operation

Active Publication Date: 2021-03-02
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are not many inorganic crystals that are transparent from the ultraviolet to deep ultraviolet regions, especially the inorganic crystals that can achieve phase matching and have a suitable frequency doubling coefficient at the same time. Whether it has practical value in terms of performance stability and other issues
At present, there is no laser that can directly realize the ultraviolet laser light source shorter than 400nm. Therefore, only the use of nonlinear optical crystals can extend the laser light source with a limited adjustable range to the ultraviolet region and deep ultraviolet region through frequency conversion technology.

Method used

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  • Potassium borate lutetium nonlinear optical crystal and its preparation method and application
  • Potassium borate lutetium nonlinear optical crystal and its preparation method and application
  • Potassium borate lutetium nonlinear optical crystal and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0038] synthetic K 3 Lu 2 B 3 o 9 Compound:

[0039] It is sintered at a high temperature of 730°C by a solid-state synthesis method, and its chemical formula is: Lu 2 o 3 +B 2 o 3 +K 2 CO 3 →K 3 Lu 2 B 3 o 9 +CO 2 ↑;

[0040] Will Lu 2 o 3 、H 3 BO 3 、K 2 CO 3 Put it into a mortar in a stoichiometric ratio, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ100mm×100mm, press it tightly, put it in a muffle furnace, slowly raise the temperature to 500°C, and keep the temperature for 5 hours. Drive out the gas, take out the crucible after cooling, take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 730°C for another 48 hours, take it out, put it in a mortar, smash and grind to get compound K 3 Lu 2 B 3 o 9 , carry out X-ray analysis to this product, the obtained X-ray spectrogram and finished product K 3 Lu 2 B 3 o 9 The X-ray spectra of single crystals g...

Embodiment 2

[0048] According to the reaction formula Lu 2 o 3 +B 2 o 3 +K 2 O→K 3 Lu 2 B 3 o 9 +CO 2 ↑Synthetic Compound K 3 Lu 2 B 3 o 9 , the specific operation steps are carried out according to embodiment 1;

[0049] Grow large size K 3 Lu 2 B 3 o 9 Nonlinear Optical Crystals:

[0050] The synthesized compound K 3 Lu 2 B 3 o 9 with flux K 2CO 3 Molby K 3 Lu 2 B 3 o 9 :K 2 CO 3 =1:2 put into a Φ80mm×80mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 950°C, keep the temperature for 30 hours, then cool down to 830°C to obtain K 3 Lu 2 B 3 o 9 Mixed melt with flux;

[0051] Slowly cool down to room temperature at a rate of 0.5°C / h, and use the platinum wire suspension method to obtain small crystals as seed crystals during the cooling;

[0052] in K 3 Lu 2 B 3 o 9 Crystal growth in the mixed melt with flux: the seed crystal cut along any axis is fixed on the lower end of the seed rod with platinum wir...

Embodiment 3

[0056] According to the reaction formula Lu 2 o 3 +H 3 BO 3 +KNO 3 →K 3 Lu 2 B 3 o 9 +N 2 O↑Synthesis of Compound K 3 Lu 2 B 3 o 9 , the specific operation steps are carried out according to embodiment 1;

[0057] Grow large size K 3 Lu 2 B 3 o 9 Nonlinear Optical Crystals:

[0058] The synthesized compound K 3 Lu 2 B 3 o 9 with flux KNO 3 Molby K 3 Lu 2 B 3 o 9 :KNO 3 =1:3 put into a Φ80mm×80mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 930°C, keep the temperature for 50 hours, then cool down to 800°C to obtain K 3 Lu 2 B 3 o 9 Mixed melt with flux;

[0059] Slowly cool down to room temperature at a rate of 2°C / h, and use the platinum wire suspension method to obtain small crystals as seed crystals during the cooling;

[0060] in K 3 Lu 2 B 3 o 9 Crystal growth on the surface of a mixed melt with a flux: the K cut along the c-axis will be 3 Lu 2 B 3 o 9 The seed crystal is fixed on t...

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Abstract

The present invention relates to a potassium borate lutetium nonlinear optical crystal and its preparation method and application. The chemical formula of the crystal is K 3 Lu 2 B 3 o 9 , molecular weight 643.67, space group is Pna 2 1 , the unit cell parameters are a=8.469(2) Å, b=9.347(3) Å, c=11.819(3) (4) Å, Z=4, V=935.6(5) Å3, Mohs hardness is 4‑ 5. The crystal is grown by the flux method, the crystal has a large size of at least centimeters, the crystal has the advantages of fast preparation speed, simple operation, low cost, large crystal size, wide light transmission band, good mechanical properties, not easy to break, physical and chemical Stable in nature, easy to process, etc., suitable for the needs of laser frequency conversion in the ultraviolet band, and can be used to make nonlinear optical devices.

Description

technical field [0001] The present invention relates to a potassium borate lutetium nonlinear optical crystal and its preparation method and application. The chemical formula of the crystal is K 3 Lu 2 B 3 o 9 . Background technique [0002] Since the advent of lasers, scientific and technological workers from all over the world have been working hard to explore frequency conversion crystal materials suitable for different wavelength ranges, and the demand for ultraviolet / deep ultraviolet lasers with higher photon energy and better coherence is imminent. How to obtain an ultraviolet deep ultraviolet all-solid-state laser source with narrow linewidth, excellent beam quality and convenient operation has become an urgent problem to be solved in the scientific community. Many scientific and technological workers are currently committed to exploring nonlinear optical crystals suitable for the ultraviolet\deep ultraviolet region. However, there are not many inorganic crystals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/10C30B11/00G02F1/355
Inventor 潘世烈杨云
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI