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Nonlinear optical crystal beryllium fluoroborate and its preparation method and use

A technology of nonlinear optics and beryllium fluoroborate, which is applied in the field of new optoelectronic functional materials and growth, can solve the problems of low crystal birefringence, insufficient advantages, parallel arrangement, etc., and achieve the effect of good chemical stability

Active Publication Date: 2018-06-15
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a large frequency doubling coefficient, and the ultraviolet absorption edge is around 160nm, but due to the (B 3 o 7 ) 5- The groups are connected to each other, forming a helical chain at 45° to the z-axis in space and cannot be arranged in parallel in the crystal lattice, so that the birefringence of the crystal is too low (Δn=0.04~0.05), so that it can be used in ultraviolet light The phase matching range of the region is severely limited, so that the advantages of wide bandgap cannot be fully utilized

Method used

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  • Nonlinear optical crystal beryllium fluoroborate and its preparation method and use
  • Nonlinear optical crystal beryllium fluoroborate and its preparation method and use
  • Nonlinear optical crystal beryllium fluoroborate and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of beryllium fluoroborate compound by hydrothermal method

[0056] Raw materials used:

[0057]

[0058] Its chemical reaction equation is:

[0059] 2BeO+H 3 BO 3 +NH 4 F = Be 2 BO 3 F+NH 3 +2H 2 o

[0060] The specific operation steps are as follows: after weighing the above-mentioned raw materials according to the above-mentioned dosage in the operation box, put them into a 23ml hydrothermal kettle, pour 10ml of distilled water, put the hydrothermal kettle into the oven, and slowly heat the oven to 220°C , keep the temperature for 7 days, and then lower the temperature to 30°C at a rate of 5°C per hour. After cooling, wash the sample with distilled water and alcohol to obtain Be 2 BO 3 F compound. This product is carried out X-ray analysis, gained collection of illustrative plates ( image 3 ) and the X-ray pattern of BBF single crystal ground into powder ( Figure 5 ) are consistent.

Embodiment 2

[0062] Growth of Beryllium Fluoroborate Single Crystal by Hydrothermal Method

[0063] The crystal growth device is a resistance wire heating furnace, and the temperature control equipment is a 908PHK20 programmable automatic temperature controller.

[0064] Raw materials used:

[0065]

[0066] The specific operation steps are as follows: choose H 3 BO 3 --NH 4 F mineralizer system, after weighing the above raw materials according to the above dosage in the operation box, put them into a hydrothermal kettle with a capacity of 35ml, then pour 20ml of distilled water, and put the reaction kettle into the resistance wire heating furnace Slowly raise the temperature to 250°C / 330°C (upper temperature / lower temperature), and keep the temperature constant for 12 days. Then cool down to 50°C at a rate of 5°C per hour, turn off the furnace, wash the sample with water and alcohol after cooling, and obtain a beryllium fluoroborate optical crystal with a size of about 1.2×1.2×0.8m...

Embodiment 3

[0068] Growth of Beryllium Fluoroborate Single Crystal by Hydrothermal Method

[0069] The crystal growth device is a resistance wire heating furnace, and the temperature control equipment is a 908PHK20 programmable automatic temperature controller.

[0070] Raw materials used:

[0071]

[0072] The specific operation steps are as follows: choose H 3 BO 3 --NH 4 F mineralizer system, after weighing the above raw materials according to the above dosage in the operation box, put them into a hydrothermal kettle with a capacity of 2000mL, then pour 1200mL of distilled water, put the reaction kettle into a resistance wire heating furnace and slowly heat up to 250°C / 330°C (upper temperature / lower temperature), constant temperature for 40 days. Then cool down to 50°C at a rate of 5°C per hour, turn off the furnace, wash the sample with water and alcohol after cooling, and obtain a beryllium fluoroborate optical crystal with a size of about 4.5×4.5×3mm.

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Abstract

The invention provides a novel nonlinear optical crystal beryllium fluoroborate and its preparation method. The chemical formula of the crystal is Be2BO3F (abbreviated as BBF). Its crystal structure belongs to the trigonal crystal system, the space group is R32, the unit cell parameters are α=β=90°, γ=120°, z=3, and the unit cell volume is about 2.2 of KH2PO4 (KDP) times. Its UV absorption edge is shorter than 180nm. Be2BO3F has nonlinear optical effect, does not deliquesce in the air, and has good chemical stability. It can be widely used in various nonlinear optical fields, and will develop nonlinear optical applications in the deep ultraviolet band.

Description

technical field [0001] The present invention relates to a novel optoelectronic functional material and its growth method and application, in particular to a nonlinear optical crystal material and its preparation method and application, i.e. beryllium fluoroborate, whose chemical formula is Be 2 BO 3 F, referred to as BBF. Background technique [0002] The nonlinear optical effect of crystal refers to such an effect: when a beam of laser light with a certain polarization direction passes through a nonlinear optical crystal (such as a borate nonlinear optical crystal) in a certain incident direction, the frequency of the beam will be change. [0003] Crystals with nonlinear optical effects are called nonlinear optical crystals. The use of nonlinear optical crystals for laser frequency conversion broadens the range of laser wavelengths and makes the application of lasers more extensive. Especially borate nonlinear optical crystals such as BaB 2 o 4 (BBO), LiB 3 o 5 (LBO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355C30B29/10C30B7/10C30B9/12
Inventor 叶宁彭广罗敏张戈陈昱
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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