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A kind of infrared nonlinear optical crystal and its preparation method

A nonlinear optics, crystal technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., to achieve the effect of good chemical stability

Active Publication Date: 2018-12-25
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the Ba / Zn / Ge / Se quaternary system, there is no research report so far, and this invention is the first report of chalcogenides in infrared nonlinear optical materials in this system

Method used

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  • A kind of infrared nonlinear optical crystal and its preparation method
  • A kind of infrared nonlinear optical crystal and its preparation method
  • A kind of infrared nonlinear optical crystal and its preparation method

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Embodiment

[0024] Adopt Ba+Zn+Ge+4Se=BaZnGeSe 4 Preparation of BaZnGeSe by High Temperature Solid State Reaction 4 Crystals can be obtained by sintering twice.

[0025] Its specific steps are as follows: elemental Ba, elemental Zn, elemental Ge and elemental Se are batched according to the ratio of molar ratio Ba:Zn:Ge:Se=1:1:1:4, and the above-mentioned ingredients are packed into a quartz tube. The quartz tube is evacuated to 10 -3 Pa and melted and sealed, put it into a programmable temperature-controlled tube furnace, raised the temperature to 800°C at a rate of 30°C / h, and kept it for 96h. After cooling, the sample was taken out; Vacuum the tube to 10 -3 Pa and melted and sealed, then put it into the temperature-controlled tube furnace again and raised the temperature to 750°C at a rate of 40°C / h for sintering for 48h to obtain the product. The product was confirmed by X-ray diffraction as figure 2 As shown, it is indeed BaZnGeSe 4 crystals.

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Abstract

The invention discloses an infrared nonlinear optical crystal and a preparation method thereof. The molecular formula of the crystal is BaZnGeSe4; the crystal has a non-centrosymmetric structure and belongs to an orthorhombic crystal system; and the space group is Ama2, cell parameters are as follows: a=11.3255(6) angstrom, b=11.2527(6) angstrom, c=6.2917(3) angstrom, and alpha=beta=gamma=90 degrees, the unit cell volume V=801.83(7) angstrom<3> and Z=4. The crystal disclosed by the invention is prepared by two times of sintering through adopting a high-temperature solid-phase reaction method. A crystal powder multiple-frequency test shows that the crystal has a strong nonlinear effect and the multiple-frequency signal strength is equal to that of AgGaS2; the crystal has an application potential in the field of infrared laser frequency conversion; meanwhile, the BaZnGeSe4 has one type of phase matching properties; and the preparation method disclosed by the invention is simple, feasible and reliable.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to an infrared nonlinear optical crystal and a preparation method thereof. Background technique [0002] Second-order nonlinear optical crystals are an important class of optoelectronic functional materials, which need to have a non-centrosymmetric structure in the crystal structure. This type of crystal can adjust the laser frequency through nonlinear effects such as frequency doubling, difference frequency, sum frequency and optical parametric oscillation, and generate a new laser source, thereby greatly expanding the application range of laser. For example, using a suitable frequency doubling crystal, the Nd:YAG (output wavelength is 1064nm) laser can be frequency doubled to produce a laser with a wavelength of 532nm; the 2.1μm laser can be frequency doubled to produce a laser with a wavelength of 1.05μm. At present, according to different application bands, this type of cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B1/10G02F1/355
CPCC30B1/10C30B29/46G02F1/3551
Inventor 尹文龙余盛全唐明静袁泽锐窦云巍张羽方攀陈莹康彬邓建国
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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