Yb掺杂Ca1-xRxF2+x(R=La, Gd)激光晶体的结构与光谱性能参数的研究

doi:10.15541/jim20160612

无机材料学报 ›› 2017, Vol. 32 ›› Issue (8): 857-862.DOI: 10.15541/jim20160612

Yb掺杂Ca_1-_xR_xF₂₊_x(R=La, Gd)激光晶体的结构与光谱性能参数的研究

何益锋¹, 薛艳艳², 刘文庆¹, 苏良碧², 唐飞², 王静雅²

(1. 上海大学材料研究所, 上海 200072; 2. 中国科学院上海硅酸盐研究所, 人工晶体研究中心, 上海 201899)

收稿日期:2016-11-17 修回日期:2016-12-10 出版日期:2017-08-10 网络出版日期:2017-07-19
作者简介:何益锋(1990–), 男, 硕士研究生. E-mail: heyifeng68@163.com
基金资助:
国家自然科学基金(51272264, 91333106);国家重点研发计划(2016YFB0402101);中国科学院战略性先导科技专项(B类)(XDB16030000)

Structure and Property of Yb Doped Ca_1-_xR_xF₂₊_x (R=La, Gd) Laser Crystals

HE Yi-Feng¹, XUE Yan-Yan², LIU Wen-Qing¹, SU Liang-Bi², TANG Fei², WANG Jing-Ya²

(1. Institute of Materials, Shanghai University, Shanghai 200072, China; 2. Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China)

Received:2016-11-17 Revised:2016-12-10 Published:2017-08-10 Online:2017-07-19
About author:HE Yi-Feng. E-mail: heyifeng68@163.com
Supported by:
National Natural Science Foundation of China (51272264, 91333106);National Key Research and Development Program of China (2016YFB0402101);Supported by the Strategic Priority Program of the Chinese Academy of Sciences (XDB16030000)

摘要/Abstract

摘要：

采用坩埚下降法生长了两个系列晶体3at%Yb:Ca_1-_xR_xF₂₊_x (R=La, Gd; x=0, 0.01, 0.03, 0.06, 0.09), 测试了晶体的XRD、拉曼光谱、吸收光谱、荧光光谱、荧光寿命。系统地研究了调剂离子La³⁺、Gd³⁺对Yb:CaF₂晶体晶格常数、拉曼光谱和光谱性能的影响规律, 分析讨论了Yb³⁺离子的结构与光谱性能之间的关系。研究结果表明, 随着La³⁺、Gd³⁺掺杂浓度增加, 晶体的晶格常数和拉曼半高宽都逐渐增大, 这说明晶体膨胀和晶格振动模式种类增多。在3at%Yb:Ca_1-_xLa_xF₂₊_x晶体中, 当调剂离子La³⁺掺杂浓度为6at%时, 具有最大吸收截面0.71×10^-20 cm², 荧光强度也最大; 而在3at%Yb:Ca_1-_xGd_xF₂₊_x晶体中, 当调剂离子Gd³⁺掺杂浓度为3at%时, 荧光强度最大, Gd³⁺掺杂浓度为6at%时, 具有最大吸收截面0.64×10^-20 cm²。共掺晶体相比于单掺3at%Yb:CaF₂晶体有更好的光谱参数。综上可知, 通过调节La³⁺、Gd³⁺离子浓度, 可以改变Yb³⁺离子的结构, 优化晶体的光谱性能。

关键词: Yb:CaF₂晶体, 调剂离子, 结构, 光谱性能

Abstract:

3at%Yb:Ca_1-_xR_xF₂₊_x (R=La, Gd; x=0, 0.01, 0.03, 0.06, 0.09) crystals were grown by a vertical Bridgman method. X-ray diffraction (XRD), Raman spectra, absorption spectra, fluorescence spectra and fluorescence lifetime were used to characterize the crystals. Effects of regulating ion La³⁺ and Gd³⁺ on lattice constants, Raman spectra and properties of Yb:CaF₂ crystals were investigated. Moreover, the relationship between structure and spectral property of Yb³⁺ ion was analyzed and discussed. The results show that lattice constant and Raman FWHM gradually increase with the increase of La³⁺ or Gd³⁺ ion doping concentration, demonstrat that lattice expands and lattice vibration modes increases, respectively. Among 3at%Yb:Ca_1-_xLa_xF₂₊_x crystals, the crystal doped with 6at% La³⁺ has the largest absorption cross section (0.71×10^-20 cm²) and the largest fluorescence intensity. Moreover, the crystal doped with 3at% Gd³⁺ has the largest fluorescence intensity. Increasing Gd³⁺ content up to 6at%, the crystal has the largest absorption cross section (0.64×10^-20 cm²). These cooping crystals have better spectral parameters than 3at%Yb:CaF₂ crystals. Based on the above results, structure of Yb³⁺ ion may be changed and the crystalline spectral properties may be optimized partly through the regulation of La³⁺ or Gd³⁺ ions’ concentration.

Key words: Yb:CaF₂ crystal, regulating ion, structure, spectral property

中图分类号:

何益锋, 薛艳艳, 刘文庆, 苏良碧, 唐飞, 王静雅. Yb掺杂Ca_1-_xR_xF₂₊_x(R=La, Gd)激光晶体的结构与光谱性能参数的研究[J]. 无机材料学报, 2017, 32(8): 857-862.

HE Yi-Feng, XUE Yan-Yan, LIU Wen-Qing, SU Liang-Bi, TANG Fei, WANG Jing-Ya. Structure and Property of Yb Doped Ca_1-_xR_xF₂₊_x (R=La, Gd) Laser Crystals[J]. Journal of Inorganic Materials, 2017, 32(8): 857-862.

图/表 10

图1 3at%Yb:CaF2晶体毛坯照片

Fig. 1 Photo of 3at%Yb:CaF2 crystal

图2 3at%Yb:CaF2及Yb:Ca1-xRxF2+x晶体抛光样品照片

Fig. 2 Photos of the polished samples of 3at%Yb:CaF2 and Yb:Ca1-xRxF2+x crystal(a) 3at%Yb:CaF2; (b) 3at%Yb:Ca0.94La0.06F2.06; (c) 3at%Yb:Ca0.97Gd0.03F2.03

图3 3at%Yb:Ca1-xRxF2+x的XRD图谱

Fig. 3 XRD patterns of 3at%Yb:Ca1-xRxF2+x

图4 3at%Yb:Ca1-xRxF2+x的晶格常数随R3+掺杂浓度的关系

Fig. 4 Change of lattice constants of 3at%Yb:Ca1-xRxF2+x with R3+ concentration

图5 3at%Yb:Ca1-xRxF2+x的拉曼光谱图

Fig. 5 Raman spectra of 3at%Yb:Ca1-xRxF2+x

图6 3at%Yb:Ca1-xRxF2+x的拉曼峰位与半高宽随R3+掺杂浓度的关系

Fig. 6 Change of Raman peak position and FWHM of 3at%Yb:Ca1-xRxF2+x with R3+ concentration

图7 3at%Yb:Ca1-xRxF2+x的吸收光谱图

Fig. 7 Absorption spectra of 3at%Yb:Ca1-xRxF2+x

图8 3at%Yb:Ca1-xRxF2+x的吸收峰位与吸收截面峰

Fig. 8 Change of absorption peak position and absorption cross section peak of 3at%Yb:Ca1-xRxF2+x with R3+ concentration(a) Absorption peak position; (b) Absorption cross section peak

图9 3at%Yb:Ca1-xRxF2+x的荧光光谱图

Fig. 9 Fluorescence spectra of 3at%Yb:Ca1-xRxF2+x

图10 3at%Yb:Ca1-xRxF2+x的荧光寿命

Fig. 10 Fluorescence lifetimes of 3at%Yb:Ca1-xRxF2+x

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Yb掺杂Ca_1-_xR_xF₂₊_x(R=La, Gd)激光晶体的结构与光谱性能参数的研究

Structure and Property of Yb Doped Ca_1-_xR_xF₂₊_x (R=La, Gd) Laser Crystals

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