NaCaBe2B2O6 nonlinear optical crystal, its growth method and application thereof

Abstract

A NaCaBe2B2O6 nonlinear optical crystal is prepared by a molten salt growth method as follows: uniformly mixing NaCaBe2B2O6 and a fluxing agent in proportion, heating to 800 DEG C, cooling to 2-10 DEG C higher than saturation temperature after reaching constant temperature so as to obtain a high-temperature solution; putting seed crystal on a seed rod into the high-temperature solution, rotating the seed rod, cooling to the saturation temperature, slowly cooling, lifting the obtained crystal out of the liquid level and cooling to room temperature so as to obtain the NaCaBe2B2O6 nonlinear optical crystal. The NaCaBe2B2O6 nonlinear optical crystal has a nonlinear optical effect and wide light transmission band. Ultraviolet cutoff edge reaches 190 nm. The crystal doesn't resolve in water, has good chemical stability, is suitable for laser frequency conversion requirements of ultraviolet band, can be used to manufacture nonlinear optical devices and harmonic light output devices for realizing 2 octaves, 3 octaves, 4 octaves, 5 octaves or 6 octaves of Nd:YAG laser, and also can be used in harmonic light output devices of other laser wavelength to generate coherent light with its wavelength being equal to or less than 266nm for output.

Description

technical field

[0001] The present invention relates to a kind of optoelectronic functional material and its growth method and application, especially to a kind of nonlinear optical material and its preparation method and application, specifically, to a calcium sodium fluoroboryryllate (NaCaBe 2 B 2 o 6 F) Nonlinear optical crystals and their growth methods and applications. The calcium sodium fluoroborate beryllium (NaCaBe 2 B 2 o 6 F) NCBBF for short. Background technique

[0002] The nonlinear optical effect of crystal refers to such an effect: when a laser beam with a certain polarization direction and a certain incident direction passes through a nonlinear optical crystal (such as NCBBF), the frequency of the laser beam will change. figure 1 with figure 2 A typical schematic diagram of this effect.

[0003] Crystals with nonlinear optical effects are called nonlinear optical crystals. Here nonlinear optical effects refer to effects such as frequency doubling, ...

Examples

Embodiment 1

[0030] Synthesis of NaCaBe 2 B 2 o 6 The amount of reagents used in F:

[0031]

[0032]

[0033] The specific operation steps are as follows:

[0034] Accurately weigh in the operation box according to the above mass, put into the agate mortar, mix well and grind carefully, then put into Put it in a 60mm×60mm platinum crucible with a cover, compact it, put it into a muffle furnace (the muffle furnace is placed in a fume hood, and the exhaust from the fume hood passes into the water tank and is discharged after being filtered), and slowly heats up to 710°C After 48 hours of sintering, the heating rate must be slow at the beginning to prevent the deviation of the proportion due to decomposition, so that the solid phase reaction can fully proceed. In the muffle furnace, it was burned to constant weight at 710°C as the end point of the reaction, and the product was confirmed to be a pure phase by powder X-ray diffraction.

Embodiment 2-8

[0035] Embodiment 2-8, respectively the embodiment of calcium sodium fluoroborate beryllium (NCBBF) nonlinear optical crystal growth:

Embodiment 2

[0037] The NCBBF crystal growth adopts the molten salt method. The crystal growth device is a self-made resistance wire heating furnace, and the temperature control equipment is an A1-708P programmable automatic temperature controller. Concrete operation is: select NCBBF (the product that embodiment 1 obtains) for use or synthesize the raw material of corresponding NCBBF compound, add flux (B 2 o 3 , NaF and CaF 2 Composition mixture), prepared according to the following ratio, 1mole NCBBF or the raw material for synthesizing 1mole NCBBF (1mole CaCO 3 , 2mole BeO, 2mole H 3 BO 3 and 1mole NaF), then add co-solvent (1mole B 2 o 3 , 3.5mole NaF and 0.5mole CaF 2 ); put it into a platinum crucible, then put it into a resistance wire heating furnace, raise the temperature to 800°C at a heating rate of 10°C / hour, keep the temperature for 40 hours until the material is fully melted, and cool down to 2°C above the saturation temperature. Put the seed crystal on the crystal rod...

technical field

[0001] The present invention relates to a kind of optoelectronic functional material and its growth method and application, especially to a kind of nonlinear optical material and its preparation method and application, specifically, to a calcium sodium fluoroboryryllate (NaCaBe 2 B 2 o 6 F) Nonlinear optical crystals and their growth methods and applications. The calcium sodium fluoroborate beryllium (NaCaBe 2 B 2 o 6 F) NCBBF for short. Background technique

[0002] The nonlinear optical effect of crystal refers to such an effect: when a laser beam with a certain polarization direction and a certain incident direction passes through a nonlinear optical crystal (such as NCBBF), the frequency of the laser beam will change. figure 1 with figure 2 A typical schematic diagram of this effect.

[0003] Crystals with nonlinear optical effects are called nonlinear optical crystals. Here nonlinear optical effects refer to effects such as frequency doubling, ...

Examples

Embodiment 1

[0030] Synthesis of NaCaBe 2 B 2 o 6 The amount of reagents used in F:

[0031]

[0032]

[0033] The specific operation steps are as follows:

[0034] Accurately weigh in the operation box according to the above mass, put into the agate mortar, mix well and grind carefully, then put into Put it in a 60mm×60mm platinum crucible with a cover, compact it, put it into a muffle furnace (the muffle furnace is placed in a fume hood, and the exhaust from the fume hood passes into the water tank and is discharged after being filtered), and slowly heats up to 710°C After 48 hours of sintering, the heating rate must be slow at the beginning to prevent the deviation of the proportion due to decomposition, so that the solid phase reaction can fully proceed. In the muffle furnace, it was burned to constant weight at 710°C as the end point of the reaction, and the product was confirmed to be a pure phase by powder X-ray diffraction.

Embodiment 2-8

[0035] Embodiment 2-8, respectively the embodiment of calcium sodium fluoroborate beryllium (NCBBF) nonlinear optical crystal growth:

Embodiment 2

[0037] The NCBBF crystal growth adopts the molten salt method. The crystal growth device is a self-made resistance wire heating furnace, and the temperature control equipment is an A1-708P programmable automatic temperature controller. Concrete operation is: select NCBBF (the product that embodiment 1 obtains) for use or synthesize the raw material of corresponding NCBBF compound, add flux (B 2 o 3 , NaF and CaF 2 Composition mixture), prepared according to the following ratio, 1mole NCBBF or the raw material for synthesizing 1mole NCBBF (1mole CaCO 3 , 2mole BeO, 2mole H 3 BO 3 and 1mole NaF), then add co-solvent (1mole B 2 o 3 , 3.5mole NaF and 0.5mole CaF 2 ); put it into a platinum crucible, then put it into a resistance wire heating furnace, raise the temperature to 800°C at a heating rate of 10°C / hour, keep the temperature for 40 hours until the material is fully melted, and cool down to 2°C above the saturation temperature. Put the seed crystal on the crystal rod...

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