Ytterbium-doped gadolinium yttrium aluminum garnet crystal and growth method thereof

Abstract

The invention provides an ytterbium-doped gadolinium yttrium aluminum garnet crystal and a growth method thereof, and belongs to the technical field of photoelectron materials. The existing Yb:Y3Al5O12 crystal is low in doping concentration and low in doping uniformity and has less possibility of achieving high-power laser output when serving as a laser material. According to the existing Yb:Y3Al5O12 crystal growth method, the Yb:Y3Al5O12 has a high smelting point of 1,950 DEG C, so that the volatilization amount of yttrium in an yttrium crucible is large, the side effect is high, the quality of the crystal is poor, and the size is small. The molecular formula of the ytterbium-doped gadolinium yttrium aluminum garnet crystal is Yb:Y2GdAl5O12, and the crystal base is yttrium aluminum garnet. According to the growth method of the ytterbium-doped gadolinium yttrium aluminum garnet crystal, the growth material comprises yttrium oxide (Y2O3), gadolinium oxide (Gd2O3) and aluminum oxide (Al2O3) at a chemical metering ratio of 2:1:5; after x moles of ytterbium oxide is added into the growth material, the adding amount of the Gd2O2 is required to be reduced by (1-x) mole on the basis of the chemical metering ratio; and the growth process parameters of the crystal are determined as follows: the pull speed is between 0.5 and 0.8 mm / h, the rotation speed is between 12 and 18 rpm and the growth temperature is 1,880 DEG C.

Description

technical field [0001] The invention relates to a ytterbium-doped yttrium-gadolinium-aluminum garnet crystal and a growth method thereof. The ytterbium-doped yttrium-gadolinium-aluminum garnet crystal is a laser crystal with a molecular formula of Yb:Y 2 GdAl 5 o 12 , belongs to the technical field of optoelectronic materials. Background technique [0002] Ytterbium-doped lasers are used in laser processing, laser display, laser medical treatment, environmental detection, communication, information processing, scientific research and other fields. In addition, the ytterbium-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 can also be used in medical fields such as ophthalmic surgery. [0003] The laser material used in Ytterbium-doped laser is Ytterbium-doped crystal, including oxide crystal, such as Yb:Y 3 Al 5 o 12 , belonging to the cubic crystal system, the crys...

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Problems solved by technology

[0011] Described crystal growth method also has its deficiency, in growing Yb:Y 3 Al 5 o 12 In the process of crystallization, since Yb:Y 3 Al 5 o 12 The melting point is high, such as 1950°C, so the iridium in the iridium crucible volatilizes a lot, and its negative effects include: 1. The volatilized iridium enters the melt and becomes a harmful impurity; 2. Enters the furnace atmosphere and blocks the observation window; 3. Attaches to Crystal growth surface, blocking crystal growth, resulting in slow crystal growth and cracking

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