A kind of crystal growth method for reducing lbo crystal absorption and crystal prepared therefrom

A technology of crystal growth and volume absorption, applied in crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of high melt viscosity and affecting the yield of LBO crystals, so as to improve crystal quality, reduce crystal enveloping, The effect of reducing viscosity
CN112126980BActive Publication Date: 2021-10-15FUJIAN CASTECH CRYSTALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJIAN CASTECH CRYSTALS
Publication Date
2021-10-15

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Abstract

A crystal growth method for reducing the absorption of LBO crystals and the crystal prepared therefrom. The method is to use boric acid and lithium carbonate as raw materials, and use a waist-shaped platinum crucible and a platinum seed rod as a growth device. The platinum seed rod has multiple pieces Parallel and slanted upward platinum sheets, the waist-shaped platinum crucible is small in the middle and large at both ends, with an axisymmetric structure up and down, left and right. In the present invention, a plurality of parallel platinum sheets are arranged on the platinum seed rod to dissipate heat for the platinum rod, thereby reducing the absorption value; the platinum sheet is designed in an upwardly inclined manner, which does not affect the seeding of the seed crystal and the observation of crystal growth The process prevents volatiles from falling in; the specially designed waist-shaped platinum crucible utilizes the special temperature field formed by the large ends and the small middle to avoid the influence of the specific platinum seed rod on the temperature field while maintaining accelerated melting. body flow, reduce the viscosity of the boric acid system, reduce the crystal envelope, and improve the crystal quality.
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Description

technical field

[0001] The invention relates to the field of crystal growth, in particular to a crystal growth method for reducing LBO crystal volume absorption and improving crystal growth quality. Background technique

[0002] LBO crystal is a kind of nonlinear optical crystal with excellent optical performance. It has wide transmission range, high optical uniformity, relatively large effective double frequency coefficient and high laser damage threshold. It has important and extensive applications in optoelectronic technology, and is widely used in the fields of laser frequency conversion, optical parametric oscillation and optical parametric amplification. As the laser power becomes higher and higher, higher requirements are placed on the absorption of LBO crystal devices.

[0003] The conventional method of growing LBO crystals uses corundum seed rods, molybdenum and other co-solvents, and the grown crystals have an absorption value of more than 300-400 ppm / cm due to t...

Claims

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