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A kind of mid-infrared nonlinear optical crystal material rb2cdbr2i2 and its preparation method

A technology of nonlinear optics and crystal materials, applied in the fields of nonlinear optics, polycrystalline material growth, chemical instruments and methods, etc., can solve the problems that the research of new frequency conversion crystals needs to be strengthened, and achieve high laser damage threshold and thermal stability , short reaction time and high product purity

Inactive Publication Date: 2016-03-16
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the book "Nonlinear Optical Crystal Materials Science" published by Science Press in 2003, it was clearly stated that "in the entire spectral band of nonlinear optics, nonlinear optical crystals in the infrared band are a weak link. Therefore, in this band Research on new frequency conversion crystals needs to be strengthened”

Method used

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  • A kind of mid-infrared nonlinear optical crystal material rb2cdbr2i2 and its preparation method
  • A kind of mid-infrared nonlinear optical crystal material rb2cdbr2i2 and its preparation method
  • A kind of mid-infrared nonlinear optical crystal material rb2cdbr2i2 and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0029] (1)Rb 2 CdBr 2 I 2 Preparation: According to the molar ratio of RbBr:CdI 2 =2:1 ratio weighs RbBr:CdI 2 , dissolved in methanol to obtain a colorless and transparent solution, which was slowly volatilized at room temperature to obtain a colorless and transparent bulk crystal, that is, an infrared nonlinear optical crystal material.

[0030] Methanol in the above steps can be replaced by ethanol, acetone, tetrahydrofuran or any mixture thereof without affecting the effect.

Embodiment 2

[0032] (1) The molar ratio is RbBr:CdI 2 = 2:1 RbBr and CdI 2 Put it into a container with a polytetrafluoroethylene substrate, add distilled water, and dissolve it at 80°C to obtain a light yellow solution;

[0033] (2) Place the light yellow solution obtained in the previous step at room temperature, and allow it to volatilize slowly to obtain colorless crystals, filter with suction, wash with distilled water, and dry to obtain infrared nonlinear optical crystal materials.

Embodiment 3

[0035] (1) The molar ratio is RbBr:CdI 2 = 2:1 RbBr and CdI 2 Put it into a container with a polytetrafluoroethylene substrate, add distilled water, and dissolve it at 230°C to obtain a light yellow solution;

[0036] (2) Place the light yellow solution obtained in the previous step at room temperature, and allow it to volatilize slowly to obtain colorless crystals, filter with suction, wash with distilled water, and dry to obtain infrared nonlinear optical crystal materials.

[0037] After testing, the yield of the product is 96%.

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Abstract

The invention provides an inorganic mid-infrared nonlinear optical crystal material which has a chemical formula of Rb2CdBr2I2. The crystal space group of the material is Ama2, and the crystal-cell parameters of the material are as follows: a is equal to 11.764(8), b is equal to 12.025(8), c is equal to 8.446 (6), alpha, beta and gamma are same and are equal to 90 degrees, and Z is equal to 4. The invention also provides a preparation method of the crystal material. The crystal material prepared by the preparation method provided by the invention has the following characteristics that (1) the frequency-doubled effect capable of realizing phase matching is stronger, and as shown by the frequency-doubled test result of Kurtz powder, the frequency-doubled effect of the powder is 4 times of that of monopotassium phosphate (KDP); (2) the laser damage threshold reaches to 190MW / cm<2>, and is 6 times of the laser damage threshold of an existing commercial mid-infrared nonlinear optical crystal material AgGaS2; (3) the compound has wide transmitting ranges in a visible-light area and a mid-infrared light area, and the complete transmitting waveband is 0.4-14 microns; (4) the inorganic mid-infrared nonlinear optical crystal material does not contain crystal water, is stable to air and is relatively good in heat stability; (5) a single-crystal material can be prepared by utilizing a simple solvent evaporation method.

Description

technical field [0001] The invention relates to the field of inorganic chemistry, in particular to a mid-infrared nonlinear optical crystal material and a preparation method thereof. Background technique [0002] Nonlinear optical effects originate from the interaction between laser and medium. When the laser propagates in a medium with non-zero second-order polarizability, nonlinear optical effects such as frequency doubling, sum frequency, difference frequency, and optical parametric amplification will occur. Using the second-order nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, frequency converters, and optical parametric oscillators can be made. In many fields, such as laser technology, atmospheric monitoring, national defense and military, etc., All have important application value. Inorganic nonlinear optical materials play a dominant role in the practical research of second-order nonlinear optical materials. Accor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B7/04G02F1/355
Inventor 吴奇秦金贵
Owner WUHAN UNIV
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