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Large size potassium strontium borate nonlinear optical crystal, preparation and use thereof

A technology of nonlinear optics and potassium borate, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as crystals that cannot be purchased in the market

Inactive Publication Date: 2009-08-26
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to test the basic physical properties (including nonlinear optical properties) of a crystal, the crystal needs to be a single crystal with a size of several millimeters or even centimeters, and there is no relevant preparation of KSr with a size sufficient for physical property testing. 4 B 3 o 9 The report of single crystal, more can't buy this crystal on the market, the present invention aims at preparing large size KSr 4 B 3 o 9 Single crystal, and test its basic physical properties

Method used

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  • Large size potassium strontium borate nonlinear optical crystal, preparation and use thereof
  • Large size potassium strontium borate nonlinear optical crystal, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take reaction formula (1) as an example: but not limited to reaction formula (1)

[0041] K 2 O+H 3 BO 3 +SrO→KSr 4 B 3 o 9 +H 2 O ↑ Synthesis of KSr 4 B 3 o 9 compound, the specific steps are as follows:

[0042] Will K 2 O, H 3 BO 3 , SrO is put into a mortar in a stoichiometric ratio, mixed and carefully ground, then put into a Φ200mm×200mm open corundum crucible, compact it, put it into a muffle furnace, slowly raise the temperature to 450°C, and keep the temperature for 5 hours , drive out the gas as much as possible, take out the crucible after cooling, grind the sample evenly, put it in the crucible, keep the temperature in the muffle furnace at 880°C for another 5 hours, wait until the temperature drops to room temperature, take it out, grind it carefully, and again Keep the temperature at 880°C for 24 hours, put it into a mortar after cooling, and grind it slightly to get fully sintered potassium strontium borate KSr 4 B 3 o 9 compound, and then...

Embodiment 2

[0047] Take reaction formula (2) as an example: but not limited to reaction formula (2)

[0048] K 2 CO 3 +B 2 o 3 +SrO→KSr 4 B 3 o 9 +CO 2 ↑ Synthesis of KSr 4 B 3 o 9 Compound, specific operation steps are carried out according to embodiment 1;

[0049] The synthesized KSr 4 B 3 o 9 Compound and Flux KF:H 3 BO 3 =1:1.5:1.5 for mixing, put into an open platinum crucible of Φ100mm×100mm, heat up to 1100°C, keep the temperature down to 865°C after 100 hours, cut along the b-axis (optimized seed crystal in Example 1) Optimized KSr 4 B 3 o 9 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The time interval is 0.1 minutes, keep the temperature for 1 hour, quickly cool down to 850°C, and then cool down at a rate of 5°C / day. Take it out of the furnace to get a transparent KSr with a size of...

Embodiment 3

[0052] Take reaction formula (4) as an example: but not limited to (4)

[0053] KNO 3 +H 3 BO 3 +Sr(NO 3 ) 2 →KSr 4 B 3 o 9 +NO 2 ↑ Synthesis of KSr 4 B 3 o 9 Compound, specific operation steps are carried out according to embodiment 1;

[0054] The synthesized KSr 4 B 3 o 9 Compound and Flux NaF:H 3 BO 3 Carry out mixing according to molar ratio 1: 3: 2, pack in the open platinum crucible of Φ 110mm * 110mm, heat up to 1000 ℃, cool down to 865 ℃ after constant temperature 50 hours, will cut along a axis (the seed crystal in embodiment 1 optimized) optimized KSr 4 B 3 o 9 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface, keep the temperature for 1 hour, quickly cool down to 845°C, and then cool down at a rate of 1°C / day. After the crystal growth is completed, the crystal is removed from...

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Abstract

The invention relates to a large size potassium strontium borate nonlinear optical crystal, the preparation and use thereof. The formula of the crystal is: KSr4B3O9, which belongs to rhombic system, the space group is Pna2(1), and the molecular weight is 566.01, and the crystal size is 10-60mmx10-60mmx10-60mm. The preparation contains the following steps of: evenly mixing the potassium strontium borate compound with a fusing assistant, heating, maintaining the constant temperature, cooling to the saturation temperature and obtaining a mixture solution, placing a seed crystal into the mixture solution, lowering the temperature to the saturation temperature to obtain the required crystal, and subsequently extracting the crystal from the liquid level, cooling to room temperature, and finally obtaining the large size potassium strontium borate nonlinear optical crystal. The nonlinear optical effect of the crystal is approximately the same as the KDP, the transparent optical band is 220nm-3000nm. The crystal is simple in operation, low in cost, large in crystal size, short in growth period, less in coating, high in laster damage threshold, good in mechanical property, firm, stable in physicochemical properties, uneasy to deliquescence, convenient for processing and storage, or the like. Accordingly, the nonlinear optical crystal of the invention can be abroadly applied in nonlinear optical devices such as frequency doubler, optical parametric oscillator or the like.

Description

technical field [0001] The invention relates to growing large-scale nonlinear optical crystal potassium strontium borate from an optimized compound flux, as well as the growth process flow of the potassium strontium borate crystal and its use as a nonlinear optical device. Background technique [0002] In the past ten years, due to the continuous deepening of social changes based on communication and information, nonlinear optical crystal materials (including laser frequency conversion materials, electro-optical materials and photorefractive materials) have been rapidly developed as one of the important information materials. development, and played an increasingly important role in the high-tech field. For example, by using the frequency doubling effect of the crystal, the frequency of the laser can be changed, and the wavelength range of the laser light source can be broadened, thereby obtaining a new laser light source and making the laser widely used. The all-solid-stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B11/00G02F1/355
Inventor 潘世烈王永疆
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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