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双掺钾钠铌酸锶钡晶体光学特性研究

Keywords: 钾钠铌酸锶钡光诱导吸收铜铈双掺杂二波耦合光学特性光折变晶体材料

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Abstract:

成功地生长、制备出了双掺(Cu,Ce)钾钠铌酸锶钡晶体样品,测量了双掺(Cu,Ce)钾钠铌酸锶钡晶体在红光波段的二波耦合特性及其光诱导吸收变化。实验结果显示,双掺(Cu,Ce)钾钠铌酸锶钡晶体在红光波段具有好的光折变性能,基红光波段的二波耦合增益可达10cm^-1;且存在着较强的光诱导吸收现象,其光诱导吸收变化明显地依赖于泵浦束光强和探测束光偏振,探测束偏振方向平等晶体c轴时的光诱导吸收系数和探测束偏振方向垂直于晶体c轴时的光诱导吸收系数分别达0.53c^-1和0.26cm^-1,并以实验结果用两光折变中心模型进行了解释。

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