Nonlinear optical crystal iodic acid germanium lithium as well as preparation method and application thereof

Abstract

The invention provides nonlinear optical crystal iodic acid germanium lithium as well as a preparation method thereof, and application of the nonlinear optical crystal iodic acid germanium lithium asa nonlinear optical crystal material. The molecular formula of the iodic acid germanium lithium is Li2Ge(IO3)6 and belongs to a hexagonal system and a crystal space group P63. The preparation method comprises the following steps: putting a lithium-containing raw material, GeO2 and HIO3 in a mole ratio of (3-6):1:(8-15) into a hydrothermal reaction kettle, and adding distilled water; sealing the reaction kettle, heating to 220-230 DEG C, performing a constant-temperature sufficient reaction at the temperature, after the reaction is completed, leaving to stand, slowly reducing to the room temperature, performing filtration, washing, and drying, thereby obtaining an inorganic crystal compound Li2Ge(IO3)6. The method is simple to operate and gentle in experiment condition; the prepared iodic acid germanium lithium crystal is excellent in growth property, has very good second-harmonic nonlinear optical effects, is capable of achieving phase matching, has relatively high transparency in visible-near-infrared light zones and medium-infrared light zones, has relatively large band gaps and relatively good thermal stability, and can be used as a nonlinear crystal material which is widely applied to fields such as optics.

Description

technical field

[0001] The invention belongs to the field of inorganic crystal optical materials, and in particular relates to a nonlinear optical crystal germanium lithium iodate compound, a preparation method of the compound, and its application as a nonlinear optical crystal material. technical background

[0002] Nonlinear optical crystal materials are a new class of materials based on the application of laser technology, which play an irreplaceable role in solid-state laser equipment. Using nonlinear optical effects such as frequency doubling, sum frequency, difference frequency and optical parametric amplification produced when laser propagates in nonlinear optical crystal materials, second harmonic generators, frequency converters, optical parametric oscillators and Nonlinear optical devices such as optical parametric amplifiers, so as to obtain continuous laser spectra that cannot be directly generated by laser light sources. Lasers with different wavelengths have e...

Examples

Embodiment 1

[0037] 3mmol LiCl, 1mmol GeO 2 and 8mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 4mL distilled water to make HIO 3 The final concentration is 2mol / L; seal the hydrothermal reactor and put it into the muffle furnace, heat it to 220°C for 0.5h, react at constant temperature for 4 days, and then cool down to room temperature at a cooling rate of 8°C / h; after the reaction , the product was suction-filtered and the resulting solid was washed with deionized water and ethanol in turn, and dried to obtain an inorganic crystal Li with an average particle size of 0.1 mm. 2 Ge(IO 3 ) 6 .

Embodiment 2

[0039] 6mmol LiNO 3 , 1 mmol GeO 2and 15mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 3mL distilled water to make HIO 3 The final concentration is 5mol / L; the hydrothermal reactor is sealed and placed in a muffle furnace, heated to 230°C for 5 hours, reacted at constant temperature for 6 days, and then cooled to room temperature at a cooling rate of 1°C / h; after the reaction, The product is suction-filtered and the obtained solid is washed successively with deionized water and ethanol, and dried to obtain an inorganic crystal Li with an average particle size of 0.6 mm. 2 Ge(IO 3 ) 6 .

Embodiment 3

[0041] 4mmol LiCl, 1mmol GeO 2 and 10mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 2.5mL distilled water to make HIO 3 The final concentration is 4mol / L; seal the hydrothermal reactor and put it into the muffle furnace, heat it to 230°C for 3 hours, react at constant temperature for 4 days and then cool it down to room temperature at a cooling rate of 0.5°C / h; after the reaction, The product is suction-filtered and the resulting solid is washed successively with deionized water and ethanol, and dried to obtain an inorganic crystal Li with an average particle size of 1.4 mm. 2 Ge(IO 3 ) 6 .

[0042] Inorganic crystal compound Li prepared by above-mentioned embodiment 2 Ge(IO 3 ) 6 The frequency doubling performance and phase matching tests are obtained by the Kurtz powder frequency doubling test method. The specific operation steps are as follows: the obtained inorganic crystal compound is firstly ground and sieved into powders of different...

technical field

[0001] The invention belongs to the field of inorganic crystal optical materials, and in particular relates to a nonlinear optical crystal germanium lithium iodate compound, a preparation method of the compound, and its application as a nonlinear optical crystal material. technical background

[0002] Nonlinear optical crystal materials are a new class of materials based on the application of laser technology, which play an irreplaceable role in solid-state laser equipment. Using nonlinear optical effects such as frequency doubling, sum frequency, difference frequency and optical parametric amplification produced when laser propagates in nonlinear optical crystal materials, second harmonic generators, frequency converters, optical parametric oscillators and Nonlinear optical devices such as optical parametric amplifiers, so as to obtain continuous laser spectra that cannot be directly generated by laser light sources. Lasers with different wavelengths have e...

Examples

Embodiment 1

[0037] 3mmol LiCl, 1mmol GeO 2 and 8mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 4mL distilled water to make HIO 3 The final concentration is 2mol / L; seal the hydrothermal reactor and put it into the muffle furnace, heat it to 220°C for 0.5h, react at constant temperature for 4 days, and then cool down to room temperature at a cooling rate of 8°C / h; after the reaction , the product was suction-filtered and the resulting solid was washed with deionized water and ethanol in turn, and dried to obtain an inorganic crystal Li with an average particle size of 0.1 mm. 2 Ge(IO 3 ) 6 .

Embodiment 2

[0039] 6mmol LiNO 3 , 1 mmol GeO 2and 15mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 3mL distilled water to make HIO 3 The final concentration is 5mol / L; the hydrothermal reactor is sealed and placed in a muffle furnace, heated to 230°C for 5 hours, reacted at constant temperature for 6 days, and then cooled to room temperature at a cooling rate of 1°C / h; after the reaction, The product is suction-filtered and the obtained solid is washed successively with deionized water and ethanol, and dried to obtain an inorganic crystal Li with an average particle size of 0.6 mm. 2 Ge(IO 3 ) 6 .

Embodiment 3

[0041] 4mmol LiCl, 1mmol GeO 2 and 10mmol HIO 3 Add volume to the hydrothermal reaction kettle of 23mL, then add 2.5mL distilled water to make HIO 3 The final concentration is 4mol / L; seal the hydrothermal reactor and put it into the muffle furnace, heat it to 230°C for 3 hours, react at constant temperature for 4 days and then cool it down to room temperature at a cooling rate of 0.5°C / h; after the reaction, The product is suction-filtered and the resulting solid is washed successively with deionized water and ethanol, and dried to obtain an inorganic crystal Li with an average particle size of 1.4 mm. 2 Ge(IO 3 ) 6 .

[0042] Inorganic crystal compound Li prepared by above-mentioned embodiment 2 Ge(IO 3 ) 6 The frequency doubling performance and phase matching tests are obtained by the Kurtz powder frequency doubling test method. The specific operation steps are as follows: the obtained inorganic crystal compound is firstly ground and sieved into powders of different...

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