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A post-processing method of iron-doped zinc selenide laser crystal

A technology of laser crystal and zinc selenide, applied in post-processing details, chemical instruments and methods, post-processing, etc., can solve problems such as the increase of Zn vacancy density, achieve the effects of inhibiting pyrolysis, eliminating residual stress, and reducing loss

Active Publication Date: 2016-03-30
北京雷生强式科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of increasing the density of Zn vacancies and Se vacancy defects in the prior art, an embodiment of the present invention provides a post-processing method for iron-doped zinc selenide laser crystals

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  • A post-processing method of iron-doped zinc selenide laser crystal
  • A post-processing method of iron-doped zinc selenide laser crystal
  • A post-processing method of iron-doped zinc selenide laser crystal

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Embodiment 1

[0031] as attached figure 1 As shown, the embodiment of the present invention provides a post-processing method of iron-doped zinc selenide laser crystal, the post-processing method of the iron-doped zinc selenide laser crystal comprises: embedding the iron-doped zinc selenide laser crystal In the mixed powder of iron powder and ZnSe powder, the high-temperature annealing treatment is performed on the iron-doped zinc selenide laser crystal embedded in the mixed powder of iron powder and ZnSe powder.

[0032] The post-processing method of the iron-doped zinc selenide laser crystal provided in the embodiment of the present invention is to embed the iron-doped zinc selenide laser crystal in the mixed powder of iron powder and ZnSe powder, and perform high-temperature annealing treatment on it. By embedding the iron-doped zinc selenide laser crystal into the mixed powder of iron powder and ZnSe powder for high-temperature annealing treatment, it can not only provide a reducing atm...

Embodiment 2

[0045] Will Fe 2+ The surface of the ZnSe crystal is cleaned, placed in a clean quartz boat, and a layer of mixed powder of high-purity iron powder and high-purity ZnSe powder is buried on the crystal (the amount of the mixed powder is to completely cover the Fe 2+ :ZnSe crystal is advisable), wherein, the average particle size of iron powder is 10 microns, and purity is 99.998%, and the average particle size of ZnSe powder is 10 microns, and purity is 99.99%, and the mass ratio of Fe powder and ZnSe powder is 1: 1.

[0046] Place the Fe in the mixed powder of the above-mentioned embedded high-purity iron powder and high-purity ZnSe powder 2+ : The quartz boat of the ZnSe crystal is packed into a clean quartz tube, and the quartz tube is evacuated to a vacuum degree of 0.001Pa, and then the quartz tube is sealed. Put the above-mentioned sealed quartz tube into a horizontal tubular crystal heat treatment furnace to treat Fe 2+ : ZnSe crystals are subjected to high-temperatur...

Embodiment 3

[0050] Will Fe 2+ : The ZnSe crystal surface is cleaned, and placed on the sample stage of the electron accelerator, using an electron beam with an energy of 1 MeV, under the condition that the beam intensity is 20mA, it is irradiated for 10 minutes and then taken out Fe 2+ : ZnSe crystal.

[0051] The above electron beam irradiated Fe 2+ : ZnSe crystals are placed in a clean quartz boat, and a layer of high-purity iron powder is buried on the crystal (the amount of high-purity iron powder is to completely cover Fe 2+ :ZnSe crystal is suitable), wherein, the average particle size of the iron powder is 50 microns, and the purity is 99.998%.

[0052] Place the Fe with the above-mentioned embedded high-purity iron powder 2+ : The quartz boat of the ZnSe crystal is packed into a clean quartz tube, and the quartz tube is evacuated to a vacuum degree of 0.1 Pa, and then the quartz tube is sealed. Put the above-mentioned sealed quartz tube into a horizontal tubular crystal heat t...

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Abstract

The invention discloses a post-processing method of an iron-doped zinc selenide laser crystal, and belongs to the technical field of laser crystal preparation. The method embeds the Fe2+: ZnSe laser crystal in a mixed powder body of iron powder and ZnSe powder, and implements the high-temperature annealing processing and the electronic beam radiation processing for the Fe2+: ZnSe laser crystal. The Fe2+: ZnSe laser crystal is embedded into the mixed powder body of the high-purity iron powder and the ZnSe powder, so that the temperature consistency of the area of the crystal is improved, and the residual stress is effectively eliminated; a reducing atmosphere and a ZnSe atmosphere can be provided for conveniently reducing Fe3+ ions to Fe2+ ions, restraining the volatilization of the ZnSe crystal and reducing and preventing Zn and Se vacancy defects. Through implementing the electronic beam radiation processing for the Fe2+: ZnSe laser crystal, the energy level trap of generating additional absorption loss in the laser output wave band can be eliminated, and the vacancy defects can be reduced; electrons can be provided for conveniently reducing the Fe3+ ions to the Fe2+ ions to finally remove the internal residual stress of the Fe2+: ZnSe laser crystal, control the valence state of the Fe2+ ions, reduce the vacancy defect density, decrease the crystal loss and improve the laser conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of preparation of laser crystal materials, in particular to a post-treatment method of iron-doped zinc selenide laser crystals. Background technique [0002] Iron-doped zinc selenide (Fe 2+ :ZnSe) is currently the only 3-5μm mid-infrared laser crystal that has been put into practical use, which can realize 3-5μm laser operation with higher power (more than 4W). However, the iron-doped zinc selenide crystals prepared by thermal diffusion doping method, crucible drop method, hot-press sintering polycrystalline ceramics and other methods all have certain residual stress in them, and will be unstable due to the activation center of the crystal. Fe 2+ ion prone to stable Fe 3+ ion transformation, resulting in iron-doped zinc selenide (Fe 2+ :ZnSe) There is a certain concentration of Fe in the crystal 3+ ions and defects such as Zn vacancies and Se vacancies, which cause Fe in the crystal to effectively gain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B33/04
Inventor 夏士兴李兴旺张月娟朱建慧王军杰杨国利王永国莫小刚
Owner 北京雷生强式科技有限责任公司