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Yb：CaF2-SrF2激光晶体光谱性能以及热学性能的研究
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：O657.3[理学—分析化学;理学—化学]
  • 作者机构：[1]宁波大学材料科学与化学工程学院,宁波315211, [2]中国科学院上海硅酸盐研究所,上海201800
  • 相关基金：国家自然科学基金（批准号：60938001,60908030,61178056）资助的课题
作者： 吴叶青[1], 苏良碧[2], 徐军[2], 陈红兵[1], 李红军[2], 郑丽和[2], 王庆国[2]
关键词： Yb:CaF2-SrF2, 吸收光谱, 荧光光谱, 热学性质, Yb ： CaF2-SrF2, spectroscopic properties, thermal properties
中文摘要：

采用坩埚下降法生长了Yb： CaF2-SrF2晶体,测试了该晶体的吸收和荧光光谱 以及在不同温度下晶体的热扩散系数和热膨胀系数,并且计算了晶体的热膨胀系数以及在常温下的热导率. 采用对比的方法,对晶体的吸收光谱,荧光光谱,热学性能进行了分析.从吸收和荧光光谱结果表明： 在掺杂相对较高浓度的SrF2的混晶中, Yb3＋吸收截面和发射截面比较大. Yb： CaF2-SrF2 （19%）晶体在1040 nm附近的发射截面比较大,光谱也比较宽. 这说明在掺杂相同浓度Yb时,混晶中CaF2, SrF2的比例不同,晶体的光谱性质不同, 主要原因是在混晶中晶体的无序度不同,晶体对称性降低,形成低对称光学中心. 从热扩散系数计算的热导率结果看出晶体具有比较好的热导率.

英文摘要：

Yb： CaF2-SrF2 crystals are grown by Bridgman technique. The spectroscopic properties, thermal diffusion coefficients and thermal expansion coefficients at different temperatures are studied. Thermal conductivity at 300 K and thermal expansion coefficient are calculated. The absorption spectra, fluorescence spectra, thermal properties of crystals are analyzed by comparison method. The results show that the absorption and emission cross sections are larger in the high concentration SrF2 disordered crystal. And also the emission cross section is large and wide at 1040 nm in the Yb： CaF2-SrF2 （19%） crystal. It demonstrates that for different ratios of CaF2 and SrF2 in the disordered crystals, the spectroscopic properties are different. The main possible reason is the different disorders, low symmetry, low symmetry optical centers in the disordered crystal. It can also be seen that the disordered crystal has a good thermal conductivity.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876