Guanidine tetrafluoroborate nonlinear optical crystal and preparation method and application thereof

A nonlinear optics, guanidine tetrafluoroborate technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as difficulty in large-sized crystals, limited application, small birefringence, etc. Wide light transmission band, stable physical and chemical properties

Active Publication Date: 2021-05-07
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

However, due to its relatively small birefringence (Δn=0.04-0.05), it cannot achieve phase matching in the deep ultraviolet region, and the shortest frequency doubling wavelength is 276nm
Similar to LBO crystals, CBO and CLBO crystals also limit their application in the deep ultraviolet region due to their relatively small birefringence
Although BBO crystal has a large frequency doubling coefficient and birefringence, due to its relatively high UV absorption cut-off edge (189nm), its shortest frequency doubling wavelength is 204.8nm, which limits its application in the deep ultraviolet region.
KBBF can achieve direct six-fold frequency output of 1064nm fundamental frequency light, but due to the layered growth habit of KBBF, it is difficult to grow large-sized crystals, which limits its application to a certain extent

Method used

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  • Guanidine tetrafluoroborate nonlinear optical crystal and preparation method and application thereof
  • Guanidine tetrafluoroborate nonlinear optical crystal and preparation method and application thereof
  • Guanidine tetrafluoroborate nonlinear optical crystal and preparation method and application thereof

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Effect test

Embodiment 1

[0039] The hydrothermal method for growing guanidine tetrafluoroborate nonlinear optical crystals, the specific operation is carried out according to the following steps:

[0040] a, guanidine carbonate and tetrafluoroboric acid molar ratio NH 2 :BF 4 =3:1 After mixing evenly and fully grinding, add 10mL of deionized water to fully mix and dissolve;

[0041] b. Transfer the mixed solution in step a into the polytetrafluoroethylene lining of a 25mL autoclave, and seal the mouth of the autoclave tightly;

[0042] c. Place the autoclave in step b in a constant temperature box, raise the temperature to 50°C at a rate of 20°C / h, keep the temperature constant for 3 days, and then lower it to room temperature at a cooling rate of 10°C / day;

[0043] d. Open the autoclave, and obtain a size of 11×10×12mm in the colorless clear solution 3 Guanidine tetrafluoroborate nonlinear optical crystal.

Embodiment 2

[0045] The hydrothermal method for growing guanidine tetrafluoroborate nonlinear optical crystals, the specific operation is carried out according to the following steps:

[0046] a. Mix guanidine sulfate and lithium tetrafluoroborate in molar ratio NH 2 :BF 4 =3:1 After mixing evenly and fully grinding, add 50mL of deionized water to fully mix and dissolve;

[0047] b. Transfer the mixed solution in step a into the polytetrafluoroethylene lining of a 100mL autoclave, and seal the mouth of the autoclave tightly;

[0048] c. Place the autoclave in step b in a thermostat, raise the temperature to 230°C at a rate of 60°C / h, keep the temperature constant for 15 days, and then drop to room temperature at a cooling rate of 100°C / day;

[0049] d. Open the autoclave, and obtain a size of 18×20×33mm in the colorless clear solution 3 Guanidine tetrafluoroborate nonlinear optical crystal.

Embodiment 3

[0051] The hydrothermal method for growing guanidine tetrafluoroborate nonlinear optical crystals, the specific operation is carried out according to the following steps:

[0052] a. Mix guanidine nitrate and ammonium tetrafluoroborate in molar ratio NH 2 :BF 4 =3:1 After mixing evenly and fully grinding, add 40mL of deionized water to fully mix and dissolve;

[0053] b. Transfer the mixed solution in step a into the polytetrafluoroethylene lining of a 70mL autoclave, and seal the mouth of the autoclave tightly;

[0054] c. Place the autoclave in step b in a thermostat, raise the temperature to 150°C at a rate of 40°C / h, keep the temperature constant for 7 days, and then lower it to room temperature at a cooling rate of 60°C / day;

[0055] d. Open the high-pressure reaction kettle, and obtain a large size of 11×22×23mm in a colorless clear solution 3 Guanidine tetrafluoroborate nonlinear optical crystal.

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Abstract

The invention relates to a guanidine tetrafluoroborate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is [C (NH2) 3] BF4, the molecular weight is 146.89, the crystal belongs to a trigonal system, the space group is R3m, and the cell parameters are as follows: a = 7.4634 (10) angstroms, b = 7.4634 (10) angstroms, c = 9.1216 (19) (6) angstroms and Z = 3. The ultraviolet cut-off edge is 200 nm, the frequency doubling response is 4-5 times that of a commercial nonlinear optical crystal KDP, and the crystal with the centimeter-level size is grown by adopting a hydrothermal method, a room-temperature solution method, an evaporation method or a solvothermal method; the invention relates to the application of the crystal for preparing harmonic light output with frequency doubled or frequency tripled or frequency quadrupled or frequency quintupled or frequency sextupled of 1064 nm fundamental frequency light outputted by an Nd: YAG laser, or generating ultraviolet and deep ultraviolet frequency doubled light output lower than 200 nm, or for preparing a frequency doubled generator, an upper or lower frequency converter or an optical parametric oscillator. The crystal has the advantages of wide light-transmitting wave band, stable physical and chemical properties, high mechanical hardness, difficulty in fragmentation and deliquescence, easiness in cutting, polishing, processing and storage and the like, and has important application in the fields of optics, laser lithography and communication.

Description

technical field [0001] The present invention relates to a kind of molecular formula for infrared-visible-deep ultraviolet-deep ultraviolet band is [C(NH 2 ) 3 ] BF 4 The guanidine tetrafluoroborate nonlinear optical crystal and its preparation method and use belong to the technical field of crystal materials and the field of optical technology. Background technique [0002] With 193nm lithography technology, micro-nano fine laser processing, and modern instruments such as ultra-high energy resolution photoelectron spectroscopy and photoelectron emission microscope, there is a strong demand for deep ultraviolet laser sources (generally referring to wavelengths shorter than 200nm). Ultraviolet laser light sources have become a recent research hotspot in the international laser science community. The development of all-solid-state deep ultraviolet laser light source, deep ultraviolet nonlinear optical crystal is a very key component. [0003] At present, the ultraviolet and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/54C30B7/10G02F1/355
CPCC30B29/54C30B7/10G02F1/3551
Inventor 潘世烈米日丁·穆太力普夏明
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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