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Nonlinear optical crystal namely lithium fluorotellurite, and preparation method and application thereof

A lithium fluorotellurite, crystallization technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., to achieve phase matching, strong nonlinear optical effects, and high crystallinity

Inactive Publication Date: 2018-02-23
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This crystalline material has not been reported so far

Method used

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  • Nonlinear optical crystal namely lithium fluorotellurite, and preparation method and application thereof
  • Nonlinear optical crystal namely lithium fluorotellurite, and preparation method and application thereof
  • Nonlinear optical crystal namely lithium fluorotellurite, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: adopt vacuum high temperature solid phase method to synthesize inorganic compound Li 7 (TeO 3 ) 3 F crystal

[0034] Put the raw material mixture obtained by mixing the raw materials in a certain proportion into a platinum crucible with a diameter of 10.0mm, and put the crucible into the N 2 In the high-temperature tube furnace in the atmosphere, crystallize at the crystallization temperature for a period of time, then slowly cool down, filter, wash, and dry to obtain colorless and transparent Li 7 (TeO 3 ) 3 F crystal. The types of raw materials contained in the raw material mixture, the ratio of each raw material, the crystallization temperature, the relationship between the crystallization time and the sample number are shown in Table 1.

[0035] Table 1Li 7 (TeO 3 ) 3 The relationship between F synthesis conditions and sample numbers

[0036]

Embodiment 2

[0037] Embodiment 2: Inorganic compound Li 7 (TeO 3 ) 3 Analysis of the crystal structure of F

[0038] The structures of samples 1# to 5# were analyzed by single crystal X-ray diffraction and powder X-ray diffraction.

[0039] Wherein, the single crystal X-ray diffraction was performed on a SuperNova Dual Wavelength CCD type X-ray single crystal diffractometer of Agilent Company. The crystal size is 0.06×0.13×0.09mm 3 ; The data collection temperature is 295K, and the diffraction light source is monochromatic Mo-Kα rays The data were processed with absorption correction using the Multi-Scan method. Structural analysis was completed using the SHELXTL-97 program package; the position of the heavy atom was determined by the direct method, and the coordinates of the remaining atoms were obtained by the difference Fourier synthesis method; 2 The full-matrix least-squares method was used to refine all atomic coordinates and anisotropic thermal parameters.

[0040] Powder X-...

Embodiment 3

[0047] Embodiment 3: frequency doubling test experiment and result

[0048] The frequency doubling test experiment of sample 1# is as follows: use the laser with a wavelength of 1064nm generated by a Q-switched Nd:YAG solid-state laser with a frequency converter as the fundamental frequency light, irradiate the crystal powder to be tested, and use a photomultiplier tube to detect the generated The second harmonic of the oscilloscope is used to display the harmonic intensity. Grind the crystal sample to be tested and the KDP crystal of the standard sample separately, and use a standard sieve to sieve crystals of different particle sizes, the particle sizes are 53-62μm, 62-75μm, 75-90μm, 90-109μm, 109-150μm, 150- 212μm, 210-270μm. Observe the change trend of the multiplier signal with the particle size, and judge whether it can achieve phase matching. Under the same test conditions, compare the intensity of the second harmonic generated by the sample to be tested with the inte...

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Abstract

The invention provides an inorganic compound, and a preparation method and an application thereof. The inorganic compound has a chemical formula of Li7Te3O9F, belongs to a hexagonal crystal system andspace group P63, and has cell parameters as follows: a is equal to b which is in a range of 11.3 to 11.5 angstroms; c is in a range of 4.7 to 4.9 angstroms; alpha is equal to beta which is 90 degrees; gamma is 120 degrees; and Z is 2. The inorganic compound provided by the invention is prepared through a high-temperature solid phase method, is an ultraviolet-visible nonlinear optical crystal containing a lone pair electron group and a tetrahedron element, shows strong frequency-doubled effect, wide light transmittance range and high thermal stability, and can be used as a nonlinear optical crystal material and applied to the field of laser frequency conversion.

Description

technical field [0001] The invention relates to a novel nonlinear optical crystal fluorine-containing lithium tellurite, a preparation method thereof and an application as a nonlinear optical crystal, belonging to the technical field of nonlinear optical materials. Background technique [0002] Nonlinear optics (NLO) crystals are important functional materials for optoelectronic information. They are widely used in laser frequency conversion, remote communication, non-invasive medical diagnosis, environmental monitoring, and laser guidance. They have become an indispensable key material for high-tech. Understanding and developing nonlinear optical (IR-NLO) crystal materials from the perspective of structure-property relationship has always been a difficult and hot topic in the field of NLO. According to the theory of anionic groups, the macroscopic nonlinear effects mainly come from the effective superposition of microscopic nonlinear groups. These nonlinear units include Te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B1/10G02F1/355
CPCC30B1/10C30B29/12G02F1/3551
Inventor 夏候平马倩
Owner BAOJI UNIV OF ARTS & SCI
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