Benefit of Nd3+ ions to the ~2.7 µm emission of Er3+: 4I11/2→4I13/2 transition in Nd,Er: CaLaGa3O7 laser crystal
Benefit of Nd3+ ions to the ~2.7 µm emission of Er3+: 4I11/2→4I13/2 transition in Nd,Er: CaLaGa3O7 laser crystal
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Nd3 离子对 Nd,Er: CaLaGa3O7 激光晶体中 Er3: 4I11/2→4I13/2 跃迁的 ~2.7 µm 发射的好处
DOI：
10.1016/j.jlumin.2018.02.017
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发表时间：
2018
影响因子：
3.6
通讯作者：
Chaoyang Tu
中科院分区：
文献类型：
--
作者：
Yunyun Liu;Yijian Sun;Yan Wang;Zhenyu You;Zhaojie Zhu;Jianfu Li;Chaoyang Tu
在Er 3+：CaLaGa 3 O 7晶体中引入Nd 3+，获得了2.7 μm的增强发射。用X射线Rietveld精修法测定了Er：CaLaGa_3 O_7和Nd，Er：CaLaGa_3 O_7晶体的结构参数。研究了Nd ~（3+）对配合物光谱性质的影响，并探讨了相互能量传递机制。研究发现，Nd 3+的加入大大提高了吸收泵浦效率，从而使Er 3+的~ 2.7 μm发射增强了近5倍，同时使~ 1.5 μm近红外发射猝灭。因此，成功地抑制了~ 2.7 μm铒激光器的自终止效应。Nd ~（3+）→ Er ~（3+）和Er ~（3+）→ Nd ~（3+）的能量转移效率分别为92.3%和接近100%。此外，还对Nd ~（3+）和Er ~（3+）之间的辐射传输微观参数进行了理论分析。结果表明，Nd ~（3+）的引入有利于Er ~（3+）：CaLaGa_3 O_7晶体获得~ 2. 7 μm激光，可作为LD泵浦中红外激光器的潜在增益介质。
Nd3+was introduced into Er3+: CaLaGa3O7crystal for an enhanced ~2.7 µm emission. The structure parameters of Er: CaLaGa3O7and Nd,Er: CaLaGa3O7crystals are determined by the X-ray Rietveld refinement method. The effects of Nd3+on the spectroscopic properties and mutual energy transfer mechanisms were investigated. It is found that Nd3+greatly improves the absorption pump efficiency and thus enhances the Er3+~ 2.7 µm emission by nearly 5 times, meanwhile, quenches the ~ 1.5 µm near-infrared emission. Therefore, the self-termination effect for ~ 2.7 µm erbium laser is suppressed successfully. Furthermore, the energy transfer efficiencies of Nd3+→Er3+and Er3+→Nd3+are estimated to be 92.3% and close to 100%, respectively. Besides, the radiative transfer microscopic parameters between Nd3+and Er3+were theoretically analyzed. The results indicate that the introduction of Nd3+is very beneficial in achieving ~ 2.7 µm laser in Er3+: CaLaGa3O7crystal, which could act as a potential gain media for LD pumped MIR laser.