Abstract Nd3+/Er3+: CaLaAl0.6Ga2.4O7 (abbr. as Nd3+/Er3+: CLAGO) crystal was firstly grown by Czochralski method. The 2.7 μm fluorescence emission properties and energy transfer mechanism of this crystal were investigated. Besides better absorption characteristic, the spectra of Nd3+/Er3+: CLAGO show much weaker near-infrared emission as well as superior mid-infrared emission in comparison to Er3+: CLGO. Furthermore, the self-termination bottleneck for Er3+ 2.7 µm laser was greatly decreased in Nd3+/Er3+: CLAGO crystal and the energy transfer efficiencies of Nd3+: 4F3/2 → Er3+: 4I11/2 and Er3+: 4I13/2 → Nd3+: 4I15/2 were determined. In the best case, the above four advantages indicate that the Nd3+/Er3+: CLAGO crystal might be suitable for pulsed operation and a promising 2.7 μm laser medium.

中文翻译：

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Nd3+/Er3+：CaLaAl0.6Ga2.4O7 晶体的晶体生长和光谱特性，用于 2.7 μm 激光器

摘要 Nd3+/Er3+：CaLaAl0.6Ga2.4O7（简称Nd3+/Er3+：CLAGO）晶体首先采用直拉法生长。研究了该晶体的 2.7 μm 荧光发射特性和能量转移机制。除了更好的吸收特性，与 Er3+: CLGO 相比，Nd3+/Er3+: CLAGO 的光谱显示出更弱的近红外发射以及更好的中红外发射。此外，Nd3+/Er3+: CLAGO 晶体中 Er3+ 2.7 µm 激光器的自终止瓶颈大大降低，Nd3+: 4F3/2 → Er3+: 4I11/2 和 Er3+: 4I13/2 → Nd3+: 4I15/ 的能量转移效率2 被确定。在最好的情况下，上述四个优点表明 Nd3+/Er3+:CLAGO 晶体可能适合脉冲操作和有前途的 2.7 μm 激光介质。