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Method for rapid growth of high-quality BBO crystal

A high-quality, crystalline technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of high risk, corrosion of crystals, and high cost

Inactive Publication Date: 2013-07-31
FUJIAN CASTECH CRYSTALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional growth method of the crystal mainly adopts the top seed crystal growth method, uses sodium fluoride or sodium oxide as flux, and grows in a slow cooling method. The growth cycle of this method is as long as 7 to 8 months and the volatilized The flux is easy to fall into the crystal surface, corrode the crystal, and directly affect the quality of the crystal, resulting in a long crystal growth cycle, high risk and high cost

Method used

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  • Method for rapid growth of high-quality BBO crystal

Examples

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Embodiment 1

[0007] Example 1: Weigh a certain amount of barium carbonate, boric acid and sodium fluoride to meet BaB2O4:NaF=2:1 (molar ratio) and mix them in a raw material barrel. Melt the mixed material in a silicon carbide rod furnace at 1000°C until the reaction is complete. Pour the melted material into a platinum crucible and place it in a molten salt furnace, raise the temperature to 980°C, keep the temperature constant for 18 hours, and then keep it at 10°C above the saturation temperature. Slowly lower the seed crystal previously fixed on the seed rod to the surface of the melt, rotate it at 4-10r / min, drop 7°C after half an hour, and the crystal begins to grow, then cool down at 1-2°C / day, when the crystal grows to When the crucible is on the wall, take out the lid, put a platinum cooling device on the surface of the crystal, raise the temperature by 5°C, keep the temperature constant for 24 hours, start to cool down at 2-4°C, grow for 4-5 months, stop cooling, and the crystal c...

Embodiment 2

[0008] Example 2: Weigh a certain amount of barium carbonate, boric acid and sodium oxide to meet the requirement of BaB2O4:NaO=3.5:1 (molar ratio) and mix them in a raw material bucket. Melt the mixed material in a silicon carbide rod furnace at 1000°C until the reaction is complete. Pour the melted material into a specially designed platinum crucible and place it in a molten salt pulling furnace, raise the temperature to 980°C, keep the temperature constant for 18 hours, and then keep it at 10°C above the saturation temperature. Slowly lower the seed crystal previously fixed on the seed rod to the surface of the melt, rotate it at 4-10r / min, drop 8°C after half an hour, and the crystal begins to grow, then cool down at 1-2°C / day, when the crystal grows to When the crucible is on the wall, take out the lid, put a platinum cooling device on the surface of the crystal, raise the temperature by 5°C, keep the temperature constant for 24 hours, start to cool down at 2-4°C, grow fo...

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Abstract

The invention provides a method for rapid growth of high-quality BBO crystal. The method uses barium carbonate and boric acid as main raw materials, sodium fluoride or sodium oxide as a flux, and a molten salt growth furnace as a growth device. A platinum cooling device is added on growth surface of the crystal, so as to increase a contact area of the platinum with the crystal, take away the heat on the crystal surface through the platinum, increase a degree of supercooling and improve a crystal growth rate. The platinum cooling device is a double-layer structure, wherein the flux volatilized during a crystal growth process condenses on an upper-layer platinum sheet and then drops to a low-layer platinum sheet, thereby preventing the flux to corrode the crystal. By using the growth method provided by the invention, a growth period of the BBO crystal can be shortened, and the high-quality BBO crystal can be obtained.

Description

technical field [0001] The invention relates to the field of crystal growth, in particular to a method for rapid growth of high-quality BBO crystals. Background technique [0002] Low-temperature phase barium metaborate (β-BaB2O4) is a crystal with obvious comprehensive advantages and good performance in nonlinear optical crystals. It has an extremely wide light transmission range, a large phase matching angle, and high light resistance. Damage threshold, broadband temperature matching and excellent optical uniformity, widely used in the second, third, fourth and fifth frequency doubling of Nd:YAG and Nd:YLF lasers, frequency doubling, tripling and mixing of dye lasers, Ti : Two, three, four frequency doubling of Sappire and Alexandrite lasers, optical parametric amplifier (OPA) and optical parametric oscillator (OPO), frequency doubling of argon ion, ruby ​​and Cu vapor lasers, etc., especially for Nd:YAG lasers The triple frequency has a wide range of applications. At pr...

Claims

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Application Information

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IPC IPC(8): C30B15/00C30B29/22
Inventor 王昌运吴少凡陈伟
Owner FUJIAN CASTECH CRYSTALS
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