Yttrium lithium fluoride composite crystal and preparation method thereof

A technology of yttrium-lithium fluoride and composite crystals, which is applied in the field of yttrium-lithium fluoride composite crystals and its preparation, can solve the problems of inability to ensure strict matching of crystal orientations, unfavorable laser output efficiency, loss of yttrium-lithium fluoride composite crystals, etc., to achieve It is convenient for large-scale industrial application, reduces the birefringence effect, and overcomes the effect of thermal expansion and detachment

Active Publication Date: 2014-10-15
北京雷生强式科技有限责任公司 +1
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Problems solved by technology

[0010] The yttrium-lithium fluoride composite crystal provided by the prior art cannot ensure strict matching of the crystal orientation, and there is a birefringence effect, which causes loss of the yttrium-lithium fluoride composite crystal, which is not conducive to improving the output efficiency of the laser

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  • Yttrium lithium fluoride composite crystal and preparation method thereof
  • Yttrium lithium fluoride composite crystal and preparation method thereof
  • Yttrium lithium fluoride composite crystal and preparation method thereof

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preparation example Construction

[0052] In the second aspect, the embodiment of the present invention provides a preparation method of yttrium lithium fluoride composite crystal, with figure 2 is a flowchart of the method. as attached figure 2 As shown, the method includes:

[0053] Step 101 , pre-bond the c-axis yttrium lithium fluoride crystal to the end of the a-axis doped yttrium lithium fluoride crystal by direct bonding technology to obtain a first intermediate product.

[0054] Step 102: Apply pressure to the first intermediate product in a direction perpendicular to the bonding surface of the first intermediate product in step 101 to obtain a second intermediate product.

[0055] Step 103, performing hot isostatic pressing on the second intermediate product in step 102 to obtain the desired yttrium-lithium fluoride composite crystal.

[0056] The method provided by the embodiment of the present invention overcomes the problem of thermal expansion separation that easily exists when crystals in dif...

Embodiment 1

[0084] Step 1. Take two c-axis yttrium lithium fluoride crystals and one a-axis doped yttrium lithium fluoride crystal, respectively polish the bonding surfaces of these three crystals, so that each bonding surface The smoothness is greater than 10-5, and the roughness is less than 10 angstroms. Wherein, the a-axis doped yttrium lithium fluoride crystal is doped with 2.0 at% thulium ions.

[0085] Step 2. Soak the above-mentioned three crystals after polishing in the active washing solution for 30 minutes. Among them, the active lotion is petroleum ether.

[0086] Step 3. Use acetone to wipe the bonding surfaces of the above-mentioned three crystals after the activation treatment, and then use direct bonding technology to make the bonding surfaces of the two c-axis crystals of yttrium lithium fluoride crystals respectively and the a-axis crystals. The bonding surfaces opposite to the doped yttrium lithium fluoride crystals are pre-bonded to obtain a first intermediate produc...

Embodiment 2

[0092] Step 1. Take two c-axis yttrium lithium fluoride crystals and one a-axis doped yttrium lithium fluoride crystal, respectively polish the bonding surfaces of these three crystals, so that each bonding surface The smoothness reaches 10-5 and the roughness reaches 9 angstroms. Wherein, the a-axis doped yttrium lithium fluoride crystal is doped with 5.0 at% holmium ions.

[0093] Step 2. Soak the above three crystals after polishing in the active washing solution for 40 minutes. Wherein, the active washing solution includes toluene and chloroform.

[0094] Step 3, use acetone and / or ethanol to wipe the bonding surfaces of the above-mentioned three crystals after the activation treatment, and then use direct bonding technology to make the bonding surfaces of the two c-axis yttrium lithium fluoride crystals respectively bonded to a The bonding surface opposite to the doped yttrium lithium fluoride crystal in the axial crystal direction is pre-bonded to obtain the first inte...

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Abstract

The invention discloses an yttrium lithium fluoride composite crystal and a preparation method thereof, and belongs to the technical field of laser crystal preparation. According to the method, an yttrium lithium fluoride crystal on a c-axis crystal orientation is pre-boned at the end part of a doped yttrium lithium fluoride crystal on an a-axis crystal orientation with a direct bonding technology, and a first intermediate product is obtained; the intermediate product is subjected to pressure treatment in the direction perpendicular to the bonding surface of the first intermediate product, and a second intermediate product is obtained; and finally, under the vacuum condition, the second intermediate product is subjected to hot isostatic pressure treatment, and the yttrium lithium fluoride composite crystal is obtained. The prepared yttrium lithium fluoride composite crystal doesn't have the axial matching problem and has a low heat effect, thermally induced depolarization loss of the crystal is reduced, and the output power and the beam quality of a laser are improved.

Description

technical field [0001] The invention relates to the technical field of laser crystal preparation, in particular to a compound crystal of yttrium lithium fluoride and a preparation method thereof. Background technique [0002] Lithium yttrium fluoride (LiYF 4 , referred to as YLF) is an excellent laser host crystal material with good spectrum and laser performance, and can realize laser output of various wavelengths from mid-infrared to visible light and ultraviolet light at room temperature. More specifically, lithium yttrium fluoride has anti-ultraviolet radiation and is suitable for multi-doping properties. The doped lithium yttrium fluoride prepared by doping different active ions can emit laser light of different wavelengths at room temperature, due to nonlinear refraction The efficiency is small, and it can be used as a working material for high-power high-energy laser device oscillators and preamplifiers. However, at high power levels, the thermal effect of the cryst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B33/06C30B33/02
Inventor 张月娟李兴旺杨国利王军杰庞才印莫小刚王永国夏士兴
Owner 北京雷生强式科技有限责任公司
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