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BaMgBO3F non-linear optical crystal, preparation method and applications thereof

A nonlinear optics, crystal technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of limited crystal size, small KTP laser damage threshold, inconvenience, etc., and achieve the effect of chemical stability

Inactive Publication Date: 2012-12-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

BBO and LBO are deliquescent due to the influence of water vapor, so they cannot be used in a high-humidity environment for a long time, and BBO is more prone to deliquescence; KTP laser damage threshold is small, and the UV cut-off wavelength is only about 350nm (see Journal of Crystal Growth 310 (2008)2010-2014), so it is limited to the 2-fold frequency output of Nd:YAG laser; KBBF contains Be elements with strong toxicity, and the crystal size that can be obtained is relatively limited, so its growth and use have many Inconvenience and limitations; CBF (see Xu Ke et al. OPTICS EXPRESS Vol.16, No. 22 (27 October 2008) 17735-17744), BABF (see Optical Materials 26 (2004) 421-423) and BCBF (see D.A. Keszler, et al .New Borate Structure for NLO Application, In: Proc.1994Mater.Res.Soc.Conf., 1994, 15-22 and Journal of Crystal Growth 289(2006) 188-191) their effective nonlinear coefficients are smaller than BZBF
[0006] Keszler et al. (US Patent No.5,677,921) also reported the application of doped Yb:BCBF crystals as laser crystals. The laser crystals also have the performance of nonlinear optical crystals, so they can be used as self-frequency doubling crystals, and as a promotion and derivative Point out the Ba in the matrix 2+ , Ca 2+ Replaced by other divalent metal ions, including Zn 2+ , but did not declare the practical application of the material BZBF without doping rare earth elements

Method used

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  • BaMgBO3F non-linear optical crystal, preparation method and applications thereof
  • BaMgBO3F non-linear optical crystal, preparation method and applications thereof
  • BaMgBO3F non-linear optical crystal, preparation method and applications thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0057] Embodiment 1-2 is BZBF powder solid phase synthesis:

Embodiment 1

[0059] Weigh the following reagents:

[0060] BaCO 3 1.973 grams to 0.01mol;

[0061] BaF 2 1.753 grams to 0.01mol;

[0062] ZnO 1.628g 0.02mol;

[0063] h 3 BO 3 1.236 grams and 0.02 mol;

[0064] The weighed reagent (molar ratio is BaCO 3 :BaF 2 :ZnO:H 3 BO 3 = 1: 1: 2: 2) placed in an agate mortar with an inner diameter of 11 cm and ground for 10 minutes to make it evenly mixed; then the mixture powder was transferred to a platinum crucible, and then heated and pre-fired in a muffle furnace; The temperature was 650°C, and the time was 3 hours; then the crucible was taken out, and the solid in it was transferred to an agate mortar and ground again for 10 minutes. After grinding, put the powder into the crucible again, place it in a muffle furnace for heating and sintering; the sintering temperature is 700°C, and the time is 15 hours; the solid obtained from sintering is ground into BZBF powder.

Embodiment 2

[0066] Weigh the following reagents:

[0067] BaC 2 o 4 2.253g 0.01mol;

[0068] Ba(OH) 2 1.713g 0.01mol;

[0069] ZnCO 3 2Zn(OH) 2 ·H 2 O 2.273 grams or 0.00667 mol;

[0070] NH 4 HF 2 0.571g 0.01mol;

[0071] B 2 o 3 0.696 g, 0.01 mol;

[0072] The weighed reagent (molar ratio is BaC 2 o 4 : Ba(OH) 2 : ZnCO 3 2Zn(OH) 2 ·H 2 O: NH 4 HF 2 :B 2 o 3 =10:10:6.67:10:10) placed in an agate mortar with an inner diameter of 13 cm and ground for 8 minutes to make it evenly mixed; The pre-fired temperature was 600°C for 3 hours; then the crucible was taken out, and the solid was transferred to an agate mortar and ground again for 15 minutes; after grinding, the powder was put into the crucible again and placed in a muffle furnace for heating and sintering; the sintering temperature was 750°C for 10 hours. The solid obtained by sintering is ground into BZBF powder.

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Abstract

The invention relates to BaMgBO3F non-linear optical crystal, a preparation method and applications thereof. The crystal belongs to a hexagonal system and a P-6 space group, and has the following cell parameters: a=5.06, c=4.28 and z=1. Zn2+ in the crystal is coordinated by three Os and two Fs. The frequency doubling effect is equivalent to LBO. The decomposing temperature is 860+ / -10 DEG C, and the crystal does not generate deliquescence in air, and is not dissolved in the water solution with the pH valve of 2-12 at normal temperature. The method has the following preparation steps of: mixing the BaMgBO3F with a fluxing agent, and heating into a melt body; forming seeds under the temperature of 0.5-5 DEG C above the temperature of the saturation point of the melt body; subsequently, decreasing the temperature to 0-1 DEG C below the temperature of the saturation point, and rotating along with decreasing temperature to grow the crystal; separating the melt body when the crystal is grown to the required size, and decreasing to the room temperature to obtain the BaMgBO3F single crystal. The crystal has the equivalent frequency doubling effect with LiB3O5 (short for LBO), and can be used as the frequency doubling crystal in the optical parametric oscillator or the harmonic generator.

Description

technical field [0001] The present invention relates to the field of optoelectronic functional materials, especially the field of inorganic nonlinear optical crystal materials and artificial crystal growth. . Specifically, the chemical formula is BaZnBO 3 The crystal material of F (abbreviated as BZBF) and its growth method and the application of the material as nonlinear optical crystal. Background technique [0002] The laser is directly produced by the laser, and often only the laser of a specific wavelength can be produced. For example, the wavelength of the Nd:YAG laser is 1064nm, which is an infrared laser. Using the nonlinear optical effect, the frequency of the laser can be doubled or continuously adjusted, so that the wavelength becomes shorter, and even the wavelength can be reduced to below 200nm, that is, visible, ultraviolet, and deep ultraviolet lasers can be obtained. The shorter wavelength of the laser means smaller coherence length and higher single-photo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355
Inventor 李如康陈鹏夏明军
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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