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

A nonlinear optics and crystal technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of inconvenient use, limited crystal size, restrictions, etc., and achieve the effect of stable chemical properties

Inactive Publication Date: 2010-08-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 failed to realize the phase-matched output of Nd:YAG laser direct quadruple frequency due to the reason of the refractive index, and the method of sum frequency is still used (see Xu Ke et al. OPTICS EXPRESS Vol.16, No.22(27October 2008) 17735-17744); BABF (see Optical Materials 26 (2004) 421-423) and BCBF (see D.A. Keszler, et al. New Borate Structure for NLOApplication, In: Proc. 1994 Mater. Res. Soc. Conf., 1994, 15-22 and Journalof Crystal Growth 289(2006) 188-191) have been reported on the nonlinear optical properties, but there is no definite data about their use to realize Nd:YAG laser 3-fold and 4-fold frequency output report
[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 Mg 2+ , but did not declare any practical application when the material BMBF is not doped with rare earth elements

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0060] Embodiment 1-2 is BMBF powder solid phase synthesis:

Embodiment 1

[0062] Weigh the following reagents:

[0063] BaCO 3 1.973g 0.01mol;

[0064] BaF 2 1.753g 0.01mol;

[0065] MgO 0.806g 0.02mol;

[0066] h 3 BO 3 1.236g 0.02mol;

[0067] The weighed reagent (molar ratio is BaCO 3 :BaF 2 :MgO: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 800°C, and the time is 15 hours; the solid obtained from sintering will be BZBF low-temperature phase powder after grinding.

Embodiment 2

[0069] Weigh the following reagents:

[0070] BaC 2 o 4 2.253g 0.01mol;

[0071] Ba(OH) 2 1.713g 0.01mol;

[0072] 5MgO·4CO 2 ·6H 2 O 1.943 grams together with 0.004mol;

[0073] NH 4 HF 2 0.571g 0.01mol;

[0074] B 2 o 3 0.696 g, 0.01 mol;

[0075] The weighed reagent (molar ratio is BaC 2 o 4 : Ba(OH) 2 : 5MgO·4CO 2 ·6H2 O: NH 4 HF 2 :B 2 o 3 =10:10:4:10:10) was placed in an agate mortar with an inner diameter of 13 cm and ground for 8 minutes to make it evenly mixed; then the mixture powder was transferred to a platinum crucible, and then placed in a muffle furnace for pre-firing. 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 950°C for 10 hours....

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Abstract

The invention relates to BaMgBO3F non-linear optical crystal, a preparation method and applications thereof. The crystal has the following cell parameters: a=17.59, b=30.50, c=8.05, alpha=beta=gamma=90, and z=48. Mg2+is coordinated by four Os and two Fs. The solid-solid phase transition temperature is 900+ / -10 DEG C, the low temperature phase has frequency doubling effect, and the ultraviolet or deep-ultraviolet wave band beams are allowed to penetrate. The frequency doubling effect of the high-temperature phase is zero, the decomposing temperature is 1050 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 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 BaMgBO 3 The crystal material of F (abbreviated as BMBF) and its growth method and the application of the material as a 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-pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/10C30B9/12H01S3/16G02F1/355
Inventor 李如康陈鹏
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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