Infrared Physics & Technology ( IF 3.1 ) Pub Date : 2021-04-30 , DOI: 10.1016/j.infrared.2021.103765 Feng Xu , Xiong Zhou , Biao Zheng , Jun Wang , Haiping Xia , Hongwei Song , Baojiu Chen
In current work, we reported a newfangled Sm3+ ion used as a sensitizer to deactivate Yb3+/Ho3+ co-doped Na5Y9F32 single crystal to enhance the ~ 2.85 μm emission. The obtained single crystals were characterized by the X-ray diffraction (XRD), absorption spectra, emission spectra and decay curves. The intensity parameters (t = 2, 4, 6) of Ho3+ ions were estimated to be (2.72, 1.76, 1.71)10-20 cm2 according to the measured absorption spectra and the emission cross section at ~ 2.85 μm (Ho3+: 5I6 → 5I7) was calculated to be 11.8 × 10−21 cm2 determining from its emission spectra. Significantly, the ~ 2.85 μm emission intensity was realized about three times enhancement by introducing 0.6 mol% Sm3+ into 1 mol% Yb3+/0.8 mol% Ho3+ co-doped Na5Y9F32 single crystal, while ~ 2.0 μm (Ho3+: 5I7 → 5I8) decreased sharply upon excitation of 980 nm. Furthermore, the Sm3+ takes as an efficient deactivation ion for Ho3+ can be inferred from the fact that the energy transfer efficiency (ETE) from Ho3+: 5I7 to Sm3+: 6H13/2 reaches up to 92.7%. All these favorable optical characteristics revealed that Sm3+/Yb3+/Ho3+ tri-doped Na5Y9F32 single crystals can act as a potential material for ~ 2.85 μm solid-state laser.
中文翻译:
通过Sm 3+失活有效提高Yb 3+ / Ho 3+共掺杂Na 5 Y 9 F 32单晶中〜2.85μm的发射
在当前的工作中,我们报道了一种新型的Sm 3+离子用作敏化剂,以使Yb 3+ / Ho 3+共掺杂的Na 5 Y 9 F 32单晶失活,从而增强了〜2.85μm的发射。通过X射线衍射(XRD),吸收光谱,发射光谱和衰减曲线来表征所获得的单晶。强度参数Ho 3+离子的(t = 2,4,6)估计为(2.72,1.76,1.71)根据测得的吸收光谱和在〜2.85μm(Ho 3+:5 I 6 → 5 I 7)的发射截面,计算出10 -20 cm 2为11.8×10 -21 cm 2。值得注意的是,通过将0.6 mol%Sm 3+引入1 mol%Yb 3+ /0.8 mol%Ho 3+共掺杂的Na 5 Y 9 F 32单晶中,实现了约2.85μm的发射强度的增强,而〜 2.0μm(Ho 3+:5 I7 → 5 I 8)在980 nm激发后急剧下降。此外,钐3+需要作为何一种有效的去激活离子3+可以从以下事实可以推断,能量传递效率(ETE)从何3+:5我7至Sm 3+:6 ħ 13/2达到了达到92.7%。所有这些有利的光学特性表明,Sm 3+ / Yb 3+ / Ho 3+三掺杂Na 5 Y 9 F 32 单晶可以作为〜2.85μm固态激光器的潜在材料。