共掺ZnO提高LiNbO_3晶体中Ho^(3+)分凝系数的研究

STUDY ON THE ENHANCEMENT OF CONDENSATION COEFFICIENT OF Ho3+ IONS IN LiNbO3 CRYSTAL BY CO-DOPING OF ZnO

在Ｈｏ∶ＬｉＮｂＯ３中掺入摩尔分数为６％的ＺｎＯ，生长（Ｈｏ，ＺｎＯ）∶ＬｉＮｂＯ３晶体．用电感耦合等离子体发射光谱（ＩＣＰ－ＡＥＳ）法，测定了晶体不同部位Ｈｏ３＋的浓度，并计算其分凝系数．共掺ＺｎＯ后，晶体中Ｈｏ３＋的分凝系数由０．３提高到０．６，表明Ｈｏ３＋在晶体中分布更均匀．

(Ho,ZnO)∶LiNbO3 crystals were grown by doping 6% (in mole) ZnO into Ho∶LiNbO3. Concentrations of Ho3+ in different parts of the crystal were determined by ICP-AES technique, and the condensation coefficients of Ho3+ in the crystals were calculated. After co-doping of 6% ZnO, the measured condensation coefficient of Ho3+ was 0.6, comparing to 0.3 in Ho∶LiNbO3. It is shown that the homogeneity of the distribution of Ho3+ is enhanced. The machenism of the enhancement by co-doping of ZnO is discussed in this paper.