Large-sized bismuth zinc borate nonlinear optical crystal, preparation method and use

一种非线性光学、硼酸铋锌的技术，应用在化学仪器和方法、硼酸盐、晶体生长等方向，能够解决无法在市场上购到晶体、未见到等问题

Active Publication Date: 2008-11-26
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

These materials have deficiencies in crystal growth: since KTP and LBO are non-identical melting compounds, flux methods must be used to grow; BaB 2 o 4 There is a phase transition, BBO is the low temperature phase BaB 2 o 4 , so it must be grown by flux method
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 has been no relevant preparation of Bi with a size sufficient for physical property testing. 2 ZnB 2 o 7 There is no single crystal report, and the crystal cannot be purchased in the market, and there is no information about Bi 2 ZnB 2 o 7 The report of the test results of the nonlinear optical properties of the single crystal may be Bi 2 ZnB 2 o 7 The Report of Using Single Crystal to Fabricate Nonlinear Optical Devices

Method used

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  • Large-sized bismuth zinc borate nonlinear optical crystal, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: (adopting compound melt method)

[0051] Synthetic bismuth zinc borate (Bi 2 ZnB 2 o 7 ) compounds:

[0052] Sintering is carried out at a high temperature of 630°C by a solid-state synthesis method, and its chemical equation is: Zn(NO 3 ) 2 +B 2 o 3 +Bi(NO 3 ) 3 → Bi 2 ZnB 2 o 7 +NO 2 ↑+O 2 ↑;

[0053] Zn(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 in a muffle furnace, slowly raise the temperature to 500°C, and keep the temperature for 24 hours. Take out the crucible after cooling, the sample is relatively loose at this time, then take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 630°C for 48 hours, take it out, put it in a mortar, mash and grind to get boric acid Bismuth zinc compound. Carry out X-ray analysis to ...

Embodiment 2

[0058] Embodiment 2: (adopting compound melt method)

[0059] According to the reaction formula ZnC 2 o 4 2H 2 O+H 3 BO 3 +Bi(C 2 o 4 ) 3 ·7H 2 O+O 2 → Bi 2 ZnB 2 o 7 +CO 2 ↑+H 2 O ↑ Synthesis of Bi 2 ZnB 2 o 7 Compound, specific operation steps are carried out according to embodiment 1;

[0060] Preparation of Bi by pulling method 2 ZnB 2 o 7 the crystal

[0061] The synthesized Bi 2 ZnB 2 o 7 Put the compound into a Φ90mm×90mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 1000°C, keep the temperature for 20 hours, then cool down to 697°C, and cut the Bi 2 ZnB 2 o 7 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, so that the seed crystal is in contact with the liquid surface of the melt, and the temperature is lowered to 695°C, the rotation speed of the seed rod is 20rp...

Embodiment 3

[0063] Embodiment 3: (adopting compound melt method)

[0064] According to the reaction formula Zn(OH) 2 +H 3 BO 3 +Bi(OH) 3 → Bi 2 ZnB 2 o 7 +H 2 O ↑ Synthesis of Bi 2 ZnB 2 o 7 Compound, specific operation steps are carried out according to embodiment 1;

[0065] Preparation of Bi by Kyropoulos method 2 ZnB 2 o 7 the crystal

[0066] The synthesized Bi 2 ZnB 2 o 7 Put the compound into a Φ80mm×80mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 1200°C, keep the temperature for 1 hour, then cool down to 695.1°C, and cut the Bi 2 ZnB 2 o 7 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, so that the seed crystal is in contact with the liquid surface of the melt, and the temperature is lowered to 695°C, the rotation speed of the seed rod is 100rpm, and the temperature is 5°C / day. ...

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Abstract

The invention relates to a zinc bismuth borate (Bi2ZnB2O7) single crystal with big size and high quality and preparation method and application. The crystal possesses a big size of at least centimeter level; a non-linear optical effect of the crystal is about the quadruple of that of KDP (KH2PO4); the transmitted wave band is 290nm to 3000nm; the crystal has the advantages of fast preparation speed; simple operation; low cost; the obtained crystal has the advantages of big size; wide transmitted wave band; high threshold value of laser injury; good mechanical property; and has the advantages that crazing is not easy to happen; materialized property is stable without deliquescence; processing and preservation are easy. The synthesized compound Bi2ZnB2O7 is adopted by the method as raw material; a pulling method, kyropoulos growing method and a crucible shifting method in a fused mass are adopted to carry out a crystal development; Bi2O3 is adopted as latent solvent; a high temperature solution method is adopted to carry out a crystal development. The application of the crystal consists of manufacturing non linear optical devices like a frequency doubling generator, an upper or a lower frequency converter, and an optical parametric oscillator, etc.

Description

technical field [0001] The present invention relates to a kind of large size bismuth zinc borate nonlinear optical crystal, especially from bismuth zinc borate (Bi 2 ZnB 2 o 7 ) in the melt or Bi 2 o 3 Large-sized high-quality bismuth zinc borate (Bi 2 ZnB 2 o 7 ) single crystal, and Bi 2 ZnB 2 o 7 The use of nonlinear optical devices made of crystals. 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-so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B9/00C30B11/00C30B15/00C01B35/12
CPCC01B35/128C01B35/127C30B29/12C30B15/30
Inventor 潘世烈李锋
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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