CAJ | 학술논문

由于Nd3+离子半径0.112nm和Y3+离子半径0.101nm相差10.9%,使得Nd3+离子非常难于进入YAG晶体中.我们用温度梯度法生长了大尺寸高浓度(2.8at%)的Nd:YAG晶体,同时与用提拉法Nd:GGG晶体进行了比较.分析了高浓度掺杂Nd:GGG和 Nd:YAG晶体浓度猝灭问题.研究了不同浓度掺杂的猝灭效应.在同样的掺杂浓度下,我们发现它们的猝灭程度不同,其原因是两种晶体中ΔE(-)mism和ΔE(+)mism不同.
유우Nd3+리자반경0.112nm화Y3+리자반경0.101nm상차10.9%,사득Nd3+리자비상난우진입YAG정체중.아문용온도제도법생장료대척촌고농도(2.8at%)적Nd:YAG정체,동시여용제랍법Nd:GGG정체진행료비교.분석료고농도참잡Nd:GGG화 Nd:YAG정체농도졸멸문제.연구료불동농도참잡적졸멸효응.재동양적참잡농도하,아문발현타문적졸멸정도불동,기원인시량충정체중ΔE(-)mism화ΔE(+)mism불동.
The ionic radius of Y3+ is 0.101nm and of Nd3+ is 0.112nm, a difference of about 10.9%. Therefore it is difficult to grow highly doped Nd:YAG. In this paper we have grown Large sized highly doped(2.8at.%) Nd:YAG crystals by TGT method. Large sized(φ＞70mm) high quality Nd:GGG crystals have been grown by CZ method for comparison at the same time. The concentration quenching in Nd:GGG crystals with high Nd3+ doping level was demonstrated and studied as well. The comparisons of the concentration quenching effects between the Nd:GGG and Nd:YAG crystals have been listed. The reason why GGG crystal has weaker concentration quenching effect than YAG crystals may be that: YAG crystal has a stronger field strength than that of GGG crystal, which leads to higher values of ΔE(-)mism and ΔE(+)mism in GGG crystal and this causes weaker concentration quenching effect in Nd:GGG crystal.