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Large size barium borate bismuth nonlinear optical crystal and preparation thereof

A non-linear optics, barium bismuth borate technology, applied in chemical instruments and methods, borate, crystal growth and other directions, can solve the problems of reports, no single crystal structure of compounds, and inability to buy crystals in the market.

Inactive Publication Date: 2012-09-26
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

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. So far, there is no relevant preparation of BaBiBO with a size sufficient for physical property testing. 4 There is no report on the single crystal, and no detailed report on the single crystal structure of the compound, and the crystal cannot be purchased on the market. In addition, there is no report on the BaBiBO 4 The report of the test results of single crystal nonlinear optical properties may be BaBiBO 4 The Report of Using Single Crystal to Fabricate Nonlinear Optical Devices

Method used

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  • Large size barium borate bismuth nonlinear optical crystal and preparation thereof
  • Large size barium borate bismuth nonlinear optical crystal and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Synthesis of barium bismuth borate (BaBiBO 4 ) compound:

[0039] The solid-state synthesis method is used to sinter at a high temperature of 630°C, and its chemical equation is: Ba(NO 3 ) 2 +H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +NO 2 ↑+H 2 O↑[(4) reaction formula]

[0040] Ba(NO 3 ) 2 、H 3 BO 3 、 Bi 2 o 3 Put it into a mortar in a stoichiometric ratio, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ400mm×400mm, press it tightly, put it into a muffle furnace, slowly raise it to 500°C, keep the temperature for 24 hours, and wait for it to cool Take out the crucible, the sample is relatively loose at this time, then take out the sample and grind it evenly again, then put it in the crucible, keep the temperature in the muffle furnace at 650°C for 48 hours, take it out, put it in a mortar, mash and grind it to get barium bismuth borate compound. Carry out X-ray analysis to this product, gained X-ray spectrogram and finished pro...

Embodiment 2

[0044] According to the reaction formula BaO+H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +H 2 O ↑ Synthesis of BaBiBO 4 , the specific operation steps are carried out according to embodiment 1;

[0045] The synthesized BaBiBO4 with flux Bi 2 o 3 Massive BaBiBO 4 : Bi 2 o 3 = 1:3 for mixing, put it into an open platinum crucible of Φ200mm×200mm, put the crucible into a vertical heating furnace, seal the opening at the top of the furnace with insulating material, and the top of the furnace corresponds to the center of the crucible Leave a small hole for the seed rod to enter and exit, heat up to 800°C, keep the temperature for 100 hours and then quickly cool down to 750.1°C (0.1°C above the saturation temperature), cut the BaBiBO along the c-axis 4 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 a small hole on the top of the furnace to make it contact with the liquid surface, and the seed cry...

Embodiment 3

[0047] Formulating BaB2O 4 Flux:

[0048] Analytical pure Ba(NO 3 ) 2 and H 3 BO 3 Mixing by molar ratio, its mixing molar ratio is: Ba(NO 3 ) 2 :H 3 BO 3 =1:2, after mixing and grinding, sintering at a temperature of 650-700°C for 36 hours to make BaB 2 o 4 flux;

[0049] According to the reaction formula BaCO 3 +H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +CO 2 ↑+H 2 O ↑ Synthesis of BaBiBO 4 , the specific operation steps are carried out according to embodiment 1;

[0050] The synthesized BaBiBO 4 Flux formulated with BaB 2 o 4 Massive BaBiBO 4 :BaB 2 o 4 = 1:0.8 for mixing, put it into an open platinum crucible of Φ100mm×100mm, put the crucible into a vertical heating furnace, seal the opening at the top of the furnace with insulating material, and the top of the furnace corresponds to the center of the crucible Leave a small hole for the seed rod to enter and exit, heat up to 600°C, keep the temperature for 72 hours and then quickly cool down to 588°C (3°C abov...

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Abstract

The invention relates to a large-sized bismuth barium borate non-linear optic crystal, which belongs to the orthorhombic system with a space group equal to Pna21 and a molecular formula equal to BaBiBo4. The crystal is made from a mixed system of bismuth barium borate, fluxing agent Bi2O3 and BaB2O4, or BaO and Bi2O3; the nonlinear optical effect of the crystal is approximately five times of that of (KH2PO4) KDP; and the crystal is transparent within a wave band of between 200 and 3,000 nm, and has the large size with 1 to 100mmx1 to 100mmx1 to 100mm. The large-sized bismuth barium borate non-linear optic crystal has the advantages of quick making speed, simple operation, low cost, large-sized and transparent crystal made by the non-linear optic crystal, wide light-transmission wave band, ideal mechanical property, infrequent fragmentation, stable physicochemical properties, no deliquescence and easy processing and preservation; moreover, the non-linear optic crystal can be used to make non-linear optical devices such as a multiple frequency generator, an upper frequency converter or a lower frequency converter and an optical parametric oscillator.

Description

technical field [0001] The invention relates to a nonlinear optical crystal and a preparation method thereof, in particular to a high-quality and large-size barium bismuth borate nonlinear optical crystal prepared by a flux method. Background technique [0002] In laser technology, the laser wave bands that can be directly obtained by using laser crystals are limited, and there are still blank wave bands from ultraviolet to infrared spectral regions. Using nonlinear optical crystals, through nonlinear optical effects such as frequency doubling, frequency mixing, and optical parametric oscillation, the limited laser wavelength can be converted into a new band of laser light. Using this technology can fill in the blank spectral region of the laser wavelength emitted by various laser devices, so that the laser can be used more widely. The all-solid-state blue-green laser system can be realized by generating near-infrared laser light from a solid-state laser and then converting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00C01B35/12H01S3/16
Inventor 潘世烈李锋
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI