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Gallium tetraborate nonlinear optical crystal as well as preparation method and application thereof

A technology of nonlinear optics and tetraboric acid, applied in the fields of nonlinear optics, chemical instruments and methods, optics, etc., can solve the problem of not being able to obtain gallium tetraborate single crystal, achieve good physical, chemical and thermal properties, and wide birefringence , the effect of large nonlinear optical coefficients

Pending Publication Date: 2022-07-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using existing crystal growth processes, it has not been possible to obtain high optical quality gallium tetraborate single crystals large enough for performance testing
Further, there are currently no reports on nonlinear optical performance testing of gallium tetraborate single crystals and / or reports on fabricating nonlinear optical devices with gallium tetraborate single crystals, especially the technology for realizing ultraviolet lasers with wavelengths shorter than 300nm to report

Method used

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  • Gallium tetraborate nonlinear optical crystal as well as preparation method and application thereof
  • Gallium tetraborate nonlinear optical crystal as well as preparation method and application thereof
  • Gallium tetraborate nonlinear optical crystal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1YGa 3 (BO 3 ) 4 Growth and use of crystals

[0052] Weigh 31.8g Y respectively 2 O 3 , 237.2g Ga 2 O 3 , 274.6g H 3 BO 3 Grind together with 23.6g LiF in an agate mortar and mix well. The uniformly mixed raw materials were pressed into a platinum crucible and placed in a crystal growth furnace. The growth furnace was heated to 1100°C for 40 hours and then lowered to 1030°C. A platinum wire with a diameter of 0.8mm was fixed on the seed rod and then extended into the solution. Then the solution was cooled down by 100°C at a rate of 0.5°C / hour, and the seed rod was lifted to remove the small grains on the platinum wire for subsequent crystal growth. seeds used.

[0053] Weigh various raw materials according to the above formula again, put the mixed raw materials into tablets and put them in a platinum crucible, and place them in a crystal growth furnace. The growth furnace is heated to 1100 °C for 40 hours and then lowered to 1030 °C. Determine the sat...

Embodiment 2

[0061] Example 2 GdGa 3 (BO 3 ) 4 Growth and use of crystals

[0062] Weigh 54.3g Gd respectively 2 O 3 , 336.8g Ga 2 O 3 , 478.8g H 3 BO 3 , 36.5g LiF together in an agate mortar and grind and mix well. The uniformly mixed raw materials were pressed into a platinum crucible and placed in a crystal growth furnace. The growth furnace was heated to 1050°C for 40 hours and then lowered to 950°C. Determine the saturation temperature point of the solution by continuously dropping the seed crystals, and then heat the solution to 10°C above the saturation temperature point, and slowly place the seed crystals (refer to Example 1 for the preparation of the seed crystals) fixed on the seed rod in advance. Drop to below the liquid level, and then drop to the saturation temperature point after half an hour of constant temperature. After 24 hours of constant temperature at the saturation point, the temperature was lowered at a rate of 1°C / day, and the crystal was rotated at a rat...

Embodiment 3

[0066] Example 3 LuGa 3 (BO 3 ) 4 Growth and use of crystals

[0067] Weigh 56.0g Lu respectively 2 O 3 , 320.5g Ga 2 O 3 , 343.7g H 3 BO 3 Grind together with 34.8g LiF in an agate mortar and mix well. The uniformly mixed raw materials were pressed into a platinum crucible and placed in a crystal growth furnace. The growth furnace was heated to 1100°C for 40 hours and then lowered to 1030°C. Determine the saturation temperature point of the solution by continuously dropping the seed crystals, and then heat the solution to 10°C above the saturation temperature point, and slowly place the seed crystals (refer to Example 1 for the preparation of the seed crystals) fixed on the seed rod in advance. Drop to below the liquid level, and then drop to the saturation temperature point after half an hour of constant temperature. After 24 hours of constant temperature at the saturation point, the temperature was lowered at a rate of 1°C / day, and the crystal was rotated at a rat...

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Abstract

The invention discloses a gallium tetraborate nonlinear optical crystal as well as a preparation method and application thereof. The molecular formula of the gallium tetraborate crystal is RGa3 (BO3) 4, the gallium tetraborate crystal belongs to a trigonal system, the space group is R32, R is selected from one, two or three elements of Y, Gd and Lu, and the size of the gallium tetraborate crystal is centimeter level. The invention provides the gallium tetraborate RGa3 (BO3) 4 crystal with high optical quality and the size of more than centimeter level for the first time. The crystal is a single crystal, has a relatively large nonlinear optical coefficient, a moderate birefringence and a wide light-transmitting wave band, and is good in physicochemical and thermal properties, resistant to strong acid and strong alkali and free of deliquescence. An RGa3 (BO3) 4 crystal cut according to a phase matching angle is used as a nonlinear optical crystal, and visible and ultraviolet band solid laser output can be realized.

Description

technical field [0001] The invention belongs to the field of optoelectronic crystal materials, in particular to a gallium tetraborate nonlinear optical crystal and a preparation method and application thereof. Background technique [0002] Visible and ultraviolet band lasers can be widely used in industrial production, social life and scientific research. At present, a main method to obtain solid-state lasers in the visible and ultraviolet bands is to convert a certain wavelength of laser light through frequency conversion of nonlinear optical crystals. Therefore, nonlinear optical crystals have important application value in the field of optoelectronics. [0003] Gallium tetraborate RGa has been reported in the prior art 3 (BO 3 ) 4 Growth, structural characteristics and luminescence properties of (R=Nd, Sm-Er, Y) crystals (Optics and Spectroscopy, 127(2019), 107; Scientific Reports, 9(2019), 12787; Optical Materials, 49(2015), 304; Prog. Crystal Growth and Character. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B15/00G02F1/35G02F1/355G02F1/37G02F1/39
CPCC30B29/22C30B15/002G02F1/353G02F1/3551G02F1/37G02F1/39
Inventor 林炎富陈雨金黄艺东黄建华龚兴红罗遵度
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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