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Growth method for thickening BBO crystal

A growth method and technology of crystal growth, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of high laser damage threshold, large birefringence, wide light transmission range, etc.

Inactive Publication Date: 2019-07-23
FUJIAN CASTECH CRYSTALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Low-temperature phase barium metaborate β-BaB2O4 is a very important new nonlinear crystal with wide light transmission range, large effective frequency doubling coefficient, large birefringence and high laser damage threshold, and is widely used in laser multiplication Frequency, there is no material with better performance to replace it

Method used

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  • Growth method for thickening BBO crystal
  • Growth method for thickening BBO crystal

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Embodiment Construction

[0007] In the embodiment of the present invention, the growth equipment used to prepare BBO crystals such as figure 1 As shown, it consists of a furnace cover with an observation hole, a motor, a seed rod, a furnace, and a crucible. The furnace is composed of three temperature zones, namely the upper heating zone, the middle zone and the lower heating zone. The middle area is surrounded by 20mm thick alumina insulation material, the maximum and minimum temperature difference is 10°C, there are two observation holes symmetrical to the center of the furnace tube on the furnace cover of the upper heating area, and the observation holes are covered with quartz sheets. Melt the raw materials for crystal growth and fill the growth crucible, place the middle part of the growth crucible in the middle area, raise the temperature, try the crystal, put the official seed crystal in the middle of the crucible, cool down at a rate of 1 °C / day, grow for 6 months, take out the crystal, and ge...

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Abstract

According to the invention, two-stage heating is adopted, BBO crystals are positioned in a middle region, a seed crystal middle growth method is adopted, forced convection of melts in upper and lowerregions is utilized, solute transportation is accelerated, and BBO crystal blanks with large thickness are obtained.

Description

technical field [0001] The invention relates to the field of artificial crystal growth, in particular to a high-quality BBO crystal growth method. Background technique [0002] Low-temperature phase barium metaborate β-BaB2O4 is a very important new nonlinear crystal with wide light transmission range, large effective frequency doubling coefficient, large birefringence and high laser damage threshold, and is widely used in laser multiplication Frequency, there is no material with better performance to replace it. [0003] The crystal is currently grown by the top seed crystal method. The crystal growth process adopts slow cooling and grows by natural convection of the fluid. The thickness of the grown crystal is only more than 20 centimeters. With the development of the laser industry, the requirements for the size of crystal devices are getting larger and larger. The invention realizes the growth of large-thickness BBO crystals through the design of the temperature field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B17/00C30B29/22
CPCC30B17/00C30B29/22
Inventor 王昌运陈伟谢发利张星陈秋华
Owner FUJIAN CASTECH CRYSTALS