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Erbium-doped gadolinium lithium fluoride crystal and growth method thereof

A technology of erbium-gadolinium lithium fluoride and crystal growth, which is applied in the field of optoelectronic materials, can solve the problems of severe volatilization of raw materials, high melting point, and difficult growth, and achieve the effect of reducing volatilization of raw materials

Inactive Publication Date: 2012-05-23
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0011] Described crystal growth method also has its deficiency, in growth Er:LiYF 4 During the crystallization process, due to the LiYF 4 The melting point is high, such as 810°C, so the raw materials volatilize severely, and it is difficult to grow large-sized Er:LiYF 4 Crystal, such as crystal size only Φ13mm×20mm

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  • Erbium-doped gadolinium lithium fluoride crystal and growth method thereof
  • Erbium-doped gadolinium lithium fluoride crystal and growth method thereof

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Embodiment Construction

[0017] The erbium-doped gadolinium lithium fluoride crystal of the present invention belongs to the tetragonal crystal system, and the rare earth erbium is used as the active ion, and the molecular formula of the erbium-doped gadolinium lithium fluoride crystal is Er:LiGdF 4 , the crystal matrix is ​​lithium gadolinium fluoride, and the doping concentration of erbium is 20-50 at.%.

[0018] Growth method of the present invention is specifically as follows:

[0019] 1. Preparation of growth material

[0020] LiF by LiF:GdF 3 =16.5~17:7.76~8 added in excess. The ratio of each component in the raw material is as follows, ErF 3 is x moles, GdF 3 is (1-x) moles, and LiF is 2.125 (1-x) moles, where the value range of x is: 0.005mol≤x≤1mol. The components are fully mixed, treated with HF atmosphere, and pressed into blocks by a hydraulic press to obtain a block growth material.

[0021] 2. Crystal growth

[0022] Growth of Er:LiGdF by pulling method 4 crystals. Put the prepa...

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Abstract

The invention relates to an erbium-doped gadolinium lithium fluoride crystal and a growth method thereof, belonging to the technical field of optoelectronic materials. The conventional erbium-doped yttrium lithium fluoride crystal has low doping concentration for the reasons of ionic radius matching; and in the growth process of the conventional erbium-doped yttrium lithium fluoride crystal, the crystal with large size is difficult to grow as the yttrium lithium fluoride has high melting point and the raw material has high volatility. The erbium-doped gadolinium lithium fluoride crystal belongs to a tetragonal crystal system and takes rare earth erbium as an activated ion, wherein the erbium-doped gadolinium lithium fluoride crystal has a molecular formula of Er: LiGdF4, and the crystal matrix is gadolinium lithium fluoride. The growth method of the erbium-doped gadolinium lithium fluoride crystal is characterized in that LiF is excessively added according to LiF: GdF3=16.5 to 17:7.76to 8, and the crystal growth process parameters are determined as: the pulling speed is 0.3 to 0.8mm / h, the rotation speed is 3 to 10rpm, and the growth temperature is 745 to 755 DEG C. The erbium-doped gadolinium lithium fluoride crystal is a laser crystal and is suitable for a high-power solid laser.

Description

technical field [0001] The invention relates to an erbium-doped gadolinium lithium fluoride crystal and a growth method thereof. The erbium-doped gadolinium lithium fluoride crystal is a laser crystal with a simplified formula of Er:GLF and belongs to the technical field of optoelectronic materials. Background technique [0002] Erbium-doped laser has the characteristics of good atmospheric transmission characteristics, strong smoke penetration ability, and good confidentiality. It is used in laser ranging, lidar, photoelectric interference, remote sensing, environmental monitoring, optical communication and other fields. In addition, the erbium-doped laser has strong absorption in water, so it is not only safe for human eyes, but also can accurately intervene in biological tissues. Therefore, it is also valuable in medical fields such as ophthalmic surgery. [0003] The laser materials used in Erbium-doped lasers are Erbium-doped crystals, including fluoride crystals, such ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B15/00C30B33/02
Inventor 刘景和李春曾繁明张学建张莹林海金银锁秦杰明董仲伟董国飞
Owner CHANGCHUN UNIV OF SCI & TECH
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