Volokitina Anna, Loiko Pavel, Pavlyuk Anatoly, Slimi Sami, Solé Rosa Maria, Salem Ezzedine Ben, Kifle Esrom, Serres Josep Maria, Griebner Uwe, Petrov Valentin, Aguiló Magdalena, Díaz Francesc, Mateos Xavier
Opt Express. 2020 Mar 30;28(7):9039-9048. doi: 10.1364/OE.384260.
We report on the crystal growth, spectroscopy and first laser operation of a novel double molybdate compound - Tm:KY(MoO). This orthorhombic (sp. gr. Pbna) crystal exhibits strong anisotropy of the spectroscopic properties due to its layered structure. The maximum stimulated emission cross-section for the F → H transition is 2.70×10 cm at 1856nm with a bandwidth of >110 nm (for E || b). The lifetime of the F state is 2.29 ms. Crystalline films and plates (thickness down to 70 µm) of high optical quality are obtained by mechanical cleavage along the (100) plane. Continuous-wave diode-pumped laser operation is achieved in such thin films and plates yielding a maximum output power of 0.88 W at ∼1.9 µm with a slope efficiency of 65.8% and a linearly polarized laser output. Vibronic lasing is demonstrated at ∼2.06 µm. Tm:KY(MoO) is promising for microchip and thin-disk lasers.
我们报道了一种新型双钼酸盐化合物——Tm:KY(MoO) 的晶体生长、光谱特性及首次激光运转情况。这种正交晶系（空间群Pbna）晶体由于其层状结构而呈现出光谱特性的强烈各向异性。在1856nm处，F → H跃迁的最大受激发射截面为2.70×10⁻²⁰cm²，带宽大于110nm（对于E || b）。F态的寿命为2.29ms。通过沿(100)面进行机械解理可获得光学质量高的晶体薄膜和薄片（厚度低至70μm）。在这种薄膜和薄片中实现了连续波二极管泵浦激光运转，在约1.9μm处产生的最大输出功率为0.88W，斜率效率为65.8%，且输出线性偏振激光。在约2.06μm处演示了振动激光。Tm:KY(MoO) 在微芯片和薄片激光器方面具有应用前景。
