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 ${\mathrm{\Omega }}_t$(t = 2, 4, 6) of Ho³⁺ ions were estimated to be (2.72, 1.76, 1.71)$\times$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⁺: ⁶H_13/2 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.

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${\mathrm{\Omega }}_{Ť}$Ho ³⁺离子的（t = 2，4，6）估计为（2.72，1.76，1.71）$\times$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。