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Application of mercuric iodobromide as infrared band second-order nonlinear optical material

A second-order nonlinear and infrared band technology, applied in nonlinear optics, polycrystalline material growth, optics, etc., can solve problems such as low damage threshold, harsh synthesis conditions, and gaps, and achieve large nonlinear optical coefficients and product The effect of high purity and simple operation

Inactive Publication Date: 2013-05-01
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For infrared nonlinear optical crystal materials, there is still a gap from practicality
The reason is that existing infrared nonlinear optical crystal materials such as AgGaS 2 , AgGaSe 2 and ZnGeP 2 Although such crystals have a large second-order nonlinear optical coefficient and a wide transmission range in the infrared region, the synthesis conditions are harsh, and it is not easy to grow large single crystals with high optical quality, especially the damage threshold is low. Therefore, it cannot meet the practical requirements of nonlinear optical crystal materials.

Method used

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  • Application of mercuric iodobromide as infrared band second-order nonlinear optical material
  • Application of mercuric iodobromide as infrared band second-order nonlinear optical material
  • Application of mercuric iodobromide as infrared band second-order nonlinear optical material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of HgBrI:

[0025] 0.7208 g (2 mmol) HgBr 2 and 0.2538 g (1 mmol) I 2 Add it into an appropriate amount of acetone solution, stir at normal temperature until it becomes a clear and transparent solution, continue to react for half an hour, and cool naturally after the reaction is completed. Through the slow volatilization method at room temperature or the slow cooling method, a yellow transparent crystal was obtained, which was confirmed to be the known compound HgBrI by single crystal X-ray diffraction test, which was the desired crystal material.

Embodiment 2

[0026] Embodiment 2: the powder frequency doubling effect of HgBrI:

[0027] The frequency doubling performance of the material is obtained by the Kurtz-Perry powder frequency doubling test method. The specific operation steps are as follows:

[0028] Grind the crystal material obtained in Example 1 into a powder with a particle size of about 80 to 100 microns, then install it in a sample cell with glass windows on both sides, then place the sample cell on the laser optical path, and use a Nd:YAG pulsed laser as the light source to generate The fundamental frequency light with a wavelength of 1064 nanometers is injected into the sample cell, and the KTP single crystal powder with a particle size of about 80-100 microns is used as a standard sample, and the signal is displayed on the oscilloscope through a photomultiplier tube.

Embodiment 3

[0029] Embodiment 3: the frequency doubling effect phase matching test of HgBrI:

[0030] The second-order nonlinear optical crystal material obtained in Example 1 was ground and sieved into powders of different particle size ranges (20~40, 40~60, 60~80, 80~100, 100~125, 125~150 and 150~ 200 microns), and then installed in the sample cell with glass windows on both sides, then put the sample cell on the laser optical path, use Nd:YAG pulsed laser as the light source to generate fundamental frequency light with a wavelength of 1064 nanometers into the sample cell, the signal is passed through the photoelectric The multiplier tube is displayed on the oscilloscope to test the intensity of the frequency multiplied signal of different particle sizes, and analyze and judge whether the compound can be phase-matched after drawing.

[0031] figure 1 and 2 They are the unit cell diagram of the HgBrI crystal and the packing diagram of the unit cell on the bc plane. The structure of Hg...

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Abstract

The invention discloses a novel second-order nonlinear optical material. The molecular formula of the novel second-order nonlinear optical material is HgBrI; and a crystallographic space group is Cmc21; a is 4.673(2); b is 7.130(3); c is 13.314(6); alpha is 900, beta is 900, gamma is 900 and Z is 4. The novel second-order nonlinear optical material has remarkable characteristics of strong second-order nonlinear optical effect which can be matched by phase, large light-transmitting windows in a visible light zone and an infrared light zone and favorable thermal stability. The crystal material can be widely applied to the fields of optics and the like.

Description

[0001] technical field [0002] The invention relates to the use of mercuric bromide iodide crystal as a second-order nonlinear optical material in the infrared band, which belongs to the field of inorganic chemistry, and also belongs to the field of material science and optics. Background technique [0003] 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 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, which have important applications in many fields, such as laser technology and national defense. value. Inorganic nonlinear optical materials play a dominant role in the practical research...

Claims

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Application Information

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IPC IPC(8): C01G13/04G02F1/355C30B29/12C30B7/14
Inventor 吴奇秦金贵
Owner WUHAN UNIV
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