Method for reducing BBO crystal intermediate enveloping

A crystal and boric acid technology, applied in the field of reducing the middle envelope of BBO crystals, can solve the problems of high laser damage threshold, large birefringence, wide light transmission range, etc.

Inactive Publication Date: 2017-12-15
FUJIAN CASTECH CRYSTALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 coeff

Method used

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  • Method for reducing BBO crystal intermediate enveloping

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Effect test

Embodiment approach 1

[0009] Mix the BBO raw materials barium carbonate, boric acid, and sodium fluoride in proportion and melt them through the chemical furnace, put them into the conical crucible at the bottom of the crucible, place the crucible in the molten salt furnace, raise the temperature to 1100°C, and the raw materials reach a molten state , lower the temperature of the melt to 1000°C for the seed crystal, slowly sink the seed rod fixed with the BBO seed crystal to the liquid level of the melt, rotate the seed rod at a speed of 5 rpm, and when the crystal grows as fast as the crucible When the wall is closed, the seed rod stops rotating and starts to cool down at a rate of 1°C / d. After 5 months, the crystal is taken out.

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Abstract

The invention discloses a method for reducing the BBO crystal intermediate enveloping. A special-shaped crucible with the cone-shaped crucible bottom is used for growth, so that the problem of BBO crystal intermediate enveloping is effectively reduced.

Description

technical field [0001] The invention relates to the field of artificial crystal growth, in particular to a method for reducing the middle envelope of BBO crystals. 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 convection in the middle of the natural convection melt is particularly small, and the middle envelope of the grown crystal is serious. Contents of the invention [0004] The object of the present invention is to adopt the special-shaped crucible method for growth, and use the spe...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B9/12
CPCC30B29/10C30B9/12
Inventor 王昌运陈伟陈养国陈秋华
Owner FUJIAN CASTECH CRYSTALS
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