Second-order non-linear optical crystal material and its synthesis process and use

A second-order nonlinear and optical crystal technology, applied in the field of optical materials and inorganic chemistry, to achieve high nonlinear optical coefficient and good thermal stability

Inactive Publication Date: 2007-01-03
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the inorganic nonlinear optical materials used in the ultraviolet region include BBO (β-barium metaborate), LBO (lithium borate), etc., and excellent nonlinear optical crystals that can be used for deep ultraviolet (<200 nanometers) frequency-doubling wave output currently blank

Method used

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  • Second-order non-linear optical crystal material and its synthesis process and use
  • Second-order non-linear optical crystal material and its synthesis process and use
  • Second-order non-linear optical crystal material and its synthesis process and use

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: KLiBeF 4 Single crystal preparation

[0024] Put 0.96 g lithium hydroxide (40 mmol), 2.24 g potassium hydroxide (40 mmol), 1.88 g beryllium fluoride (40 mmol) and 2.20 g ammonium hydrofluoride (40 mmol) into polytetrafluoroethylene In the ethylene reactor (volume about 20 ml), add 10 ml of distilled water, under stirring, add hydrofluoric acid, adjust the pH value to 6. Sealed, heated to 140 degrees Celsius, and kept at a constant temperature for 25 hours. Naturally cooled to room temperature, filtered to obtain a large number of colorless and transparent crystals. The product is washed repeatedly with distilled water and dried in vacuum to obtain colorless and transparent KLiBeF directly. 4 single crystal.

Embodiment 2

[0025] Example 2: KLiBeF 4 Single crystal preparation

[0026] Put 0.96 g of lithium hydroxide (40 mmol), 2.24 g of potassium hydroxide (40 mmol), 1.88 g of beryllium fluoride (40 mmol) and 4.40 g of ammonium hydrofluoride (80 mmol) into polytetrafluoroethylene In the ethylene reactor (capacity about 20 ml), add 14 ml of distilled water, under stirring, add hydrofluoric acid, adjust the pH value to 7. Sealed, heated to 150 degrees Celsius, and kept at a constant temperature for 30 hours. Naturally cooled to room temperature, filtered to obtain a large number of colorless and transparent crystals. The product is washed repeatedly with distilled water and dried in vacuum to obtain colorless and transparent KLiBeF directly. 4 single crystal.

Embodiment 3

[0027] Example 3: KLiBeF 4 Single crystal preparation

[0028] Put 0.96 g of lithium hydroxide (40 mmol), 2.24 g of potassium hydroxide (40 mmol), 1.88 g of beryllium fluoride (40 mmol) and 6.60 g of ammonium hydrofluoride (120 mmol) into polytetrafluoroethylene In the ethylene reactor (about 20 ml in volume), add 16 ml of distilled water, and under stirring, add hydrofluoric acid to adjust the pH value to 5. Sealed, heated to 160 degrees Celsius, and kept at a constant temperature for 20 hours. Naturally cooled to room temperature, filtered to obtain a large number of colorless and transparent crystals. The product is washed repeatedly with distilled water and dried in vacuum to obtain colorless and transparent KLiBeF directly. 4 single crystal.

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Abstract

The present invention discloses one kind of second-order non-linear optical crystal material and its preparation process and use. The crystal material has molecular expression of KLiBeF4 and crystal space group of P63. Its preparation process includes the following steps: setting lithium hydroxide, potassium hydroxide, beryllium fluoride and ammonium hydrofluorate into reactor, adding distilled water, adding hydrofluoric acid while stirring to regulate pH value to 5-7; sealing, heating to 140-160 deg.c and maintaining for over 20hr; lowering the temperature to room temperature and filtering to obtain colorless transparent crystal; and washing with distilled water and vacuum drying to obtain the second-order non-linear optical crystal. The second-order non-linear optical crystal has great transparent windows in deep violet area, visible light area and infrared area, great second-order non-linear optical coefficient, high heat stability, simple synthesis and other advantages.

Description

technical field [0001] The invention relates to a second-order nonlinear optical crystal material, which belongs to the field of inorganic chemistry and also belongs to the field of optical materials. 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 parametric amplification will occur. With the continuous development of laser science and technology, inorganic nonlinear optical crystal materials play an increasingly important role in frequency conversion. At present, the inorganic nonlinear optical materials used in the ultraviolet region include BBO (β-barium metaborate), LBO (lithium borate), etc., and excellent nonlinear optical crystals that can be used for deep ultraviolet (<200 nanometers) frequency-doubling wave output Currently...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12
Inventor 苏旭秦金贵张刚蒋世超刘涛陈创天吴以成
Owner WUHAN UNIV
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