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A cesium magnesium sulfate nonlinear optical crystal and its preparation method and application

A nonlinear optics and crystal technology, applied in the direction of nonlinear optics, optics, crystal growth, etc., can solve the problems of small birefringence, large birefringence, difficult to obtain, etc., to achieve stable physical and chemical properties, good mechanical properties, The effect of moderate hardness

Active Publication Date: 2020-11-27
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the birefringence of LBO is relatively small, and the quadrupling output of 1064 nm wavelength laser cannot be realized; the birefringence of BBO is relatively large, and there is a photorefractive effect when used for quadrupling output of 1064 nm wavelength laser, which limits However, CLBO is extremely deliquescent and difficult to achieve commercial applications; KBBF is difficult to obtain due to its severe layered growth habit. c thicker crystals

Method used

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  • A cesium magnesium sulfate nonlinear optical crystal and its preparation method and application
  • A cesium magnesium sulfate nonlinear optical crystal and its preparation method and application
  • A cesium magnesium sulfate nonlinear optical crystal and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Powdered Cs 2 Mg 3 (SO 4 ) 4 Compound preparation

[0022] Adopt solid phase reaction method to prepare, and its reaction equation is as follows:

[0023] Cs 2 SO 4 +3MgSO 4 =Cs 2 Mg 3 (SO 4 ) 4 .

[0024] The specific operation steps are: weigh Cs respectively 2 SO 4 1.086 g (0.003 mol), MgSO 41.083 g (0.009mol), put them into a mortar, mix and grind evenly, then put them into a corundum ceramic crucible, compact them, put them in a muffle furnace, and raise the temperature to 450 at a rate of 8 °C / hour ℃, heat preservation and sintering for 24 hours, then lower to room temperature, take it out, grind evenly, then raise the temperature to 650 ℃ at a rate of 10 ℃ / hour, sinter for 48 hours, take it out and grind it more than 2 times in the middle, and obtain the pure phase Cs 2 Mg 3 (SO 4 ) 4 compound.

[0025] After testing, the prepared Cs 2 Mg 3 (SO 4 ) 4 Nonlinear optical crystals do not contain a center of symmetry and belong to the...

Embodiment 2

[0028] Example 2 Powdered Cs 2 Mg 3 (SO 4 ) 4 Compound preparation

[0029] Adopt solid phase reaction method to prepare, and its reaction equation is as follows:

[0030] Cs 2 SO 4 +3MgSO 4 ·7H 2 O=Cs 2 Mg 3 (SO 4 ) 4 +21H 2 O↑

[0031] The specific operation steps are: weigh Cs respectively 2 SO 4 1.086 g (0.003 mol), MgSO 4 ·7H 2 O 2.218g (0.009 mol), put them into a mortar, mix and grind evenly, then pack into a corundum ceramic crucible, compact it, put it in a muffle furnace, and heat up to 500 ℃, heat preservation and sintering for 24 hours, then lowered to room temperature and taken out, ground evenly, then heated up to 630 ℃ at a rate of 55 ℃ / hour and sintered for 48 hours, took out and ground more than 2 times in the middle, and obtained pure phase Cs 2 Mg 3 (SO 4 ) 4 compound.

Embodiment 3

[0032] Example 3 Cs 2 Mg 3 (SO 4 ) 4 Crystal preparation

[0033] The Cs was prepared by melt growth 2 Mg 3 (SO 4 ) 4 Nonlinear optical crystals, which are respectively weighed Cs 2 SO 4 2.171g (0.006mol), MgSO 4 1.083g (0.009 mol), they are mixed and placed in a crystal growth furnace, kept at 860°C for more than 2 hours to melt into a melt, then measure the saturation temperature of the melt, and then cool the melt to below The saturation temperature was 5°C, and then the temperature was slowly lowered to 600°C at 0.5°C / day, and then rapidly lowered to room temperature to obtain the crystals.

[0034] The crystal of the present invention has frequency doubling effect. Figure 4 For adopting the Cs prepared by the present invention 2 Mg 3 (SO 4 ) 4 Schematic diagram of the structure of nonlinear optical devices made of crystals. At room temperature, a Q-switched Nd:YAG laser is used as the fundamental frequency light source, and the incident laser beam 2 (near...

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Abstract

The invention discloses a Cs2Mg3(SO4)4 non-linear optical crystal as well as a preparation method and application thereof. The preparation method comprises the following step: by taking Cs2SO4 and Mg-containing sulfate as raw materials, sintering so as to obtain a Cs2Mg3(SO4)4 microcrystal; or mixing and melting Cs2SO4 and Mg-containing sulfate, thereby obtaining the Cs2Mg3(SO4)4 non-linear optical crystal. The Cs2Mg3(SO4)4 disclosed by the invention belongs to an orthorhombic system P212121 space group, a MgO6 polyhedron and a SO4 tetrahedron in the structure are in co-top point connection toform a three-dimensional frame, and in addition, frame pores are filled with Cs<+> ions. By adopting the crystal, a pure phase and a single crystal of Cs2Mg3(SO4)4 are obtained, the synthesis methodis simple, the yield is high, and the crystal has a short ultraviolet cut-off side, a moderate frequency doubling conversion efficiency and good growth habits, and can be applied to non-linear opticaldevices such as frequency conversion, optical parameter oscillation, electro-optical modulation and communication.

Description

technical field [0001] The invention belongs to the field of nonlinear optical materials, in particular to a Cs 2 Mg 3 (SO 4 ) 4 Nonlinear optical crystal and its preparation method and its application in the preparation of nonlinear optical devices. Background technique [0002] The nonlinear optical effect of crystal means that when a beam of laser light with a certain polarization direction passes through a nonlinear optical crystal in a certain direction, the frequency of the beam will change. Crystals with nonlinear optical effects are called nonlinear optical crystals. Using the nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, up and down frequency converters, and optical parametric oscillators can be made, and all-solid-state lasers that use nonlinear optical crystals for frequency conversion are also future A development direction of lasers, but the key lies in obtaining excellent nonlinear optical crystals. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B11/00C30B29/46G02F1/355
CPCC30B11/00C30B29/46G02F1/3551
Inventor 沈耀国
Owner MINJIANG UNIV
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