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Nonlinear optical crystal, nonlinear optical switch and preparation method and use method of nonlinear optical switch

A technology of nonlinear optics and nonlinear switching, applied in the fields of nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems that the liquid phase is difficult to be practically applied, and the application of solid-state nonlinear switching is limited.

Active Publication Date: 2020-06-16
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the field of nonlinear switches, liquid phase research based on photochemical reactions, redox reactions, and protonation reactions has made great achievements, but liquid phases are difficult to apply in practice.
[0003] Solid-state nonlinear switches usually have excellent nonlinear optical performance, but they need to face great challenges
For the performance of solid-state nonlinear switches related to previous studies, they mainly focus on high nonlinear contrast value, large nonlinear coefficient, and strong stability, but they can only be used in a specific temperature range (usually referring to phase transition temperature), which greatly limits the application of solid-state nonlinear switching
Therefore, it is of great practical value to design and synthesize solid-state nonlinear optical switches with excellent properties and a wide temperature range. However, materials that can be used as solid-state nonlinear switches need to meet harsh conditions, which is still a great challenge.

Method used

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  • Nonlinear optical crystal, nonlinear optical switch and preparation method and use method of nonlinear optical switch
  • Nonlinear optical crystal, nonlinear optical switch and preparation method and use method of nonlinear optical switch
  • Nonlinear optical crystal, nonlinear optical switch and preparation method and use method of nonlinear optical switch

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preparation example Construction

[0054] The embodiment of the present invention also provides a method for preparing a nonlinear optical crystal or a nonlinear optical switch, comprising the following steps:

[0055] Will (NH 4 ) 2 PO 3 F, KOH and solvent are mixed and stirred to obtain a mixed solution;

[0056] The solvent in the mixed solution was removed by evaporation.

[0057] K can be prepared by the above method x (NH 4 ) 2-x PO 3 F. (NH 4 ) 2 PO 3 The molar ratio of F and KOH depends on the K in the target compound + Content requirements are determined. i.e. K x (NH 4 ) 2-x PO 3 In the preparation of F (NH 4 ) 2 PO 3 The molar ratio of F and KOH is 1:x.

[0058] In one embodiment, K x (NH 4 ) 2-x PO 3 The preparation of F crystals can be carried out in a container, such as a beaker, and there will be a lot of NH during the reaction 3 The release is therefore preferably carried out in a fume hood.

[0059] In one embodiment, (NH 4 ) 2 PO 3 F can be purchased or prepared by...

Embodiment 1

[0068] Ammonium monofluorophosphate ((NH 4 ) 2 PO 3 F) Synthesis: H 3 PO 4 (99%, Alpha Aisha), CO(NH 2 ) 2 (99.99996%, Alfa Aisha), NH 4 HF 2 (99.99%, Alfa Aisha) is used as a synthetic raw material, and ammonium monofluorophosphate (polycrystalline) is obtained by solid-phase synthesis. All weighing operations were carried out in a glove box filled with argon gas, and the water and oxygen contents were all lower than 0.1ppm. 1.4621g phosphoric acid, 0.8960g urea and 0.4255g ammonium bifluoride are mixed in a polytetrafluoroethylene container with a molar ratio of 2:2:1, covered, placed in a muffle furnace, raised to 150°C in 45 minutes and kept for 300 minutes , and then drop to 30°C at 1°C / m1n, then turn off the furnace.

Embodiment 2

[0070] The raw material is: (NH 4 ) 2 PO 3 F (synthesized in Example 1), KOH (95%, Aladdin)

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Abstract

The invention discloses a nonlinear optical crystal, wherein the chemical formula of the nonlinear optical crystal is Kx(NH4)2-xPO3F, wherein x is selected from any integer or decimal number greater than 0 and less than 2. The invention further discloses a nonlinear optical switch; the chemical formula of the nonlinear optical switch is Kx(NH4)2-xPO3F, wherein x is selected from any integer or decimal number larger than or equal to 0 and smaller than or equal to 0.3. The invention further discloses a preparation method of the nonlinear optical crystal or the nonlinear optical switch. The preparation method comprises the following steps: mixing and stirring (NH4)2PO3F, KOH and a solvent to obtain a mixed solution; and evaporating to remove the solvent in the mixed solution. The invention also discloses a solid-state laser device, a sensor, an electro-optical modulator or a memory comprising the nonlinear optical switch.

Description

technical field [0001] The invention relates to the technical field of nonlinear switches, in particular to a nonlinear optical crystal, nonlinear optics and a preparation method and application method thereof. Background technique [0002] Nonlinear optical substances such as commercial crystals BBO, LBO, KDP, AGS, ZnGeP 2 etc. are essential parts of solid-state laser devices, and solid-state laser devices are widely used in ultrafast spectroscopy, medical equipment, and information processing. As a branch of nonlinear optics, nonlinear switches have strong potential value in sensors, electro-optic modulators, and energy-saving memories. Nonlinear optical material refers to the ability to switch between "on" and "off" states under certain external influences (such as light, heat, etc.). In the field of nonlinear switching, great achievements have been made in liquid phase research based on photochemical reactions, redox reactions, and protonation reactions, but liquid pha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B7/14C30B7/04G02F1/355
CPCC30B7/04C30B7/14C30B29/12G02F1/3551
Inventor 吴立明潘春亚陈玲杨昕睿熊琳卢忠伟甄博宇隋鑫
Owner BEIJING NORMAL UNIVERSITY