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In∶Yb∶Er∶LiNbO3晶体的生长和光谱性能

DOI: 10.7521/j.issn.0454-5648.2014.06.12

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Abstract:

采用提拉法生长了掺0.25%(摩尔分数,下同)Yb2O3,0.25%Er2O3和(0.5%、1.0%、1.5%)In2O3的3种同成分In∶Yb∶Er∶LiNbO3晶体。通过晶体的红外光谱,解释了In3+,Yb3+和Er3+在晶体中的占位,由于Yb3+和Er3+离子的掺入,在In∶Yb∶Er∶LiNbO3晶体中In3+既占据Li位又部分占据Nb位,使2%In∶Yb∶Er∶LiNbO3晶体达到阈值浓度。采用980nm二极管激光器测试了In∶Yb∶Er∶LiNbO3晶体上转换发射光谱。结果表明晶体的绿光上转换发射中心波段位于525、550nm处,分别相应于Er3+的2H11/2→4I15/2跃迁和4S3/2→4I15/2跃迁;上转换红光发射中心波段在660nm处,对应Er3+的4F9/2→4I15/2辐射跃迁。In3+能提高Yb∶Er∶LiNbO3晶体的抗光损伤能力,改变Er3+和Yb3+的局部环境及Yb3+对Er3+的敏化作用,使得In∶Yb∶Er∶LiNbO3晶体发光性能改变。

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