Evidence of self-frequency doubling from two inequivalent Nd3+ centers in the La2CaB10O19:Nd3+ bifunctional crystal
Evidence of self-frequency doubling from two inequivalent Nd3+ centers in the La2CaB10O19:Nd3+ bifunctional crystal
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DOI：
10.1063/1.2149496
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发表时间：
2005-12
影响因子：
3.2
通讯作者：
A. Brenier;Yicheng Wu;P. Fu;R. Guo;F. Jing
中科院分区：
文献类型：
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作者：
A. Brenier;Yicheng Wu;P. Fu;R. Guo;F. Jing
采用高温助熔剂法生长了不同Nd 3+浓度的NdxLa 2 − xCaB 10 O 19晶体。室温光谱学，即，吸收，发射和寿命测量，被用来获得两个不等价的Nd 3+中心在晶体主机的签名。这是由于Nd ~（3+）同时取代了La ~（3+）和Ca ~（2+）的位置。在Judd-Ofelt分析的帮助下估计了非辐射能量损失。在XZ主平面上，实现了F_3scin24 → I_11scin24Nd ~（3+）激光通道的自倍频，效率为5%。结果清楚地表明，两个不等价的发光中心可以产生自倍频。
NdxLa2−xCaB10O19 crystals with different Nd3+ concentrations were grown by the high-temperature flux method. Room-temperature spectroscopy, i.e., absorption, emission, and lifetime measurements, was used to obtain the signatures of two inequivalent Nd3+ centers in the crystal host. They are attributed to Nd3+ substitution of both La3+ and Ca2+ sites. Nonradiative energy losses were estimated with the help of the Judd-Ofelt analysis. Self-frequency doubling of the F3∕24→I11∕24 Nd3+ laser channel with 5% efficiency was demonstrated in the XZ principal plane. It is clearly shown that self-frequency doubling can occur from two inequivalent luminescent centers.