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rb 4 cd 2 i 8 h 2 oCompounds, nonlinear optical crystals and their preparation methods and uses

A rb4cd2i8·h2o, nonlinear optics technology, applied in nonlinear optics, cadmium compounds, chemical instruments and methods, etc., can solve problems such as difficulty in obtaining high-quality large-size single crystals, anisotropic thermal expansion, and low laser damage threshold. , to achieve the effect of large nonlinear optical effect, low human toxicity and good mechanical properties

Active Publication Date: 2020-08-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they also have some serious disadvantages, for example, their extrinsic defects easily cause light absorption and light scattering, which easily cause the crystal to have relatively low transmittance in the near and mid-infrared regions; there is serious anisotropic thermal expansion; it is generally not easy to obtain high Quality, Large Size Single Crystal
In addition, due to their narrow bandgap, their laser damage threshold is relatively low, especially AgGaS 2 The laser damage threshold of the crystal is only 15MW cm -2
In summary, it can be found that these shortcomings limit their application in the mid-infrared band

Method used

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  • rb <sub>4</sub> cd <sub>2</sub> i <sub>8</sub> h <sub>2</sub> oCompounds, nonlinear optical crystals and their preparation methods and uses
  • rb <sub>4</sub> cd <sub>2</sub> i <sub>8</sub> h <sub>2</sub> oCompounds, nonlinear optical crystals and their preparation methods and uses
  • rb <sub>4</sub> cd <sub>2</sub> i <sub>8</sub> h <sub>2</sub> oCompounds, nonlinear optical crystals and their preparation methods and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of powdered Rb 4 Cd 2 I 8 ·H 2 O compound.

[0043] Using the mechanochemical method, the reaction equation is as follows:

[0044] 4RbI+2CdI 2 +H 2 O=Rb 4 Cd 2 I 8 ·H 2 o

[0045] The dosage of the above three reagents: RbI 0.425 grams (0.002mol), CdI 2 0.366 grams (0.001 mol).

[0046] The specific operation steps are: weigh the reagents according to the above dosages, put them into a mortar, mix and grind them evenly for 1 hour until there is no rustling sound, and then the pure phase Rb can be obtained. 4 Cd 2 I 8 ·H 2 O compound. Such as figure 2 As shown, its powder X-ray diffraction pattern is consistent with the pattern obtained according to its single crystal structure fitting.

Embodiment 2

[0048] Preparation of powdered Rb 4 Cd 2 I 8 ·H 2 O compound.

[0049] Using the mechanochemical method, the reaction equation is as follows:

[0050] 4RbI+2CdI 2 +H 2 O=Rb 4 Cd 2 I 8 ·H 2 o

[0051] The dosage of the above three reagents: RbI 0.425 grams (0.002mol), CdI 2 0.366 grams (0.001mol), H 2 0.5 mL (0.0005 mol).

[0052] The specific operation steps are: weigh the reagents according to the above dosages, put them into a mortar, mix and grind them evenly for 20 hours until there is no rustling sound, and then the pure phase Rb can be obtained. 4 Cd 2 I 8 ·H 2 O compound.

Embodiment 3

[0054] Preparation of crystalline Rb 4 Cd 2 I 8 ·H 2 O compound.

[0055] Using mechanochemical method and solvent evaporation method, the reaction equation is as follows:

[0056] 4RbI+2CdI 2 +H 2 O=Rb 4 Cd 2 I 8 ·H 2 o

[0057] The dosage of the above three reagents: RbI 0.425 grams (0.002mol), CdI 2 0.366 grams (0.001 mol).

[0058] The specific operation steps are: weigh the reagents according to the above dosage, put them into the mortar, mix and grind them evenly for 24 hours until there is no rustling sound, put them into a clean container, add an appropriate amount of organic solvent, and stir with a glass rod Make it fully mixed and dissolved;

[0059] b. Seal the container in step a with weighing paper or plastic wrap, and make some small holes on the weighing paper or plastic wrap, and let stand at 50°C for 1-3 weeks;

[0060] c. Waiting for the solution in step b to grow crystal particles at the bottom of the container until the size of the crystal p...

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Abstract

The invention relates to an Rb4Cd2I8.H2O compound, a Rb4Cd2I8.H2O nonlinear optical crystal, a preparation method for the Rb4Cd2I8.H2O crystal and application of the application of the Rb4Cd2I8.H2O crystal to preparation of nonlinear optical devices. The double frequency conversion efficiency of the Rb4Cd2I8.H2O crystal at 1,064 nm is about 5 times that of a KH2PO4(KDP) crystal, and the transmission ranges of the crystal are 0.32-2.78 [mu]m, 2.85-6.20 [mu]m and 6.56-41 [mu]m, belonging to mid-infrared bands. In addition, the invention has the following beneficial effects: the method has the advantages of simple operation, low cost, little pollution, low toxicity of raw materials, short growth period, etc.; the obtained crystal has the advantages of a high laser damage threshold, high nonlinear optical effect, good mechanical properties, etc, and high-quality large-size single crystal meeting the needs of commercialization can grow; the crystal can be used for fabricating nonlinear optical devices; and the nonlinear optical devices fabricated by using the nonlinear optical crystal of the invention can be used in a plurality of military and civil high-tech fields, such as laser infrared spectrometers, laser radars, laser projection televisions, optical computing and fiber-optic communications.

Description

technical field [0001] The present invention relates to a kind of Rb 4 Cd 2 I 8 ·H 2 O compound, Rb 4 Cd 2 I 8 ·H 2 O nonlinear optical crystal, the Rb 4 Cd 2 I 8 ·H 2 The preparation method of O crystal and the application of the crystal in making nonlinear optical device. [0002] technical background [0003] The nonlinear optical effect of crystal refers to such an effect: 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-down frequency converters, and optical parametric oscillators can be made. The all-solid-state laser using nonlinear optical crystals for frequency conversion is a development direction of lasers in the future, and the key is to obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355C30B29/12C30B7/14C01G11/00
CPCC01G11/00C01P2002/72C30B7/14C30B29/12
Inventor 罗军华李先锋赵三根
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI