Říha Adam, Jelínková Helena, Doroshenko Maxim E, Jelínek Michal, Šulc Jan, Němec Michal, Vyhlídal David, Kovalenko Nazar O
Faculty of Nuclear Sciences and Physical Engineering (FNSPE), Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic.
Prokhorov General Physics Institute, Vavilov Str. 38, 119991 Moscow, Russia.
Materials (Basel). 2022 Jul 30;15(15):5277. doi: 10.3390/ma15155277.
Two different mid-infrared (mid-IR) solid-state crystalline laser active media of Cr2+, Fe2+:Zn1-xMnxSe and Cr2+, Fe2+:Zn1-xMgxSe with similar amounts of manganese or magnesium ions of x ≈ 0.3 were investigated at cryogenic temperatures for three different excitation wavelengths: Q-switched Er:YLF laser at the wavelength of 1.73 μm, Q-switched Er:YAG laser at 2.94 μm, and the gain-switched Fe:ZnSe laser operated at a liquid nitrogen temperature of 78 K at ∼4.05 μm. The temperature dependence of spectral and laser characteristics was measured. Depending on the excitation wavelength and the selected output coupler, both laser systems were able to generate radiation by Cr2+ or by Fe2+ ions under direct excitation or indirectly by the Cr2+→ Fe2+ energy transfer mechanism. Laser generation of Fe2+ ions in Cr2+, Fe2+:Zn1-xMnxSe and Cr2+, Fe2+:Zn1-xMgxSe (x ≈ 0.3) crystals at the wavelengths of ∼4.4 and ∼4.8 μm at a temperature of 78 K was achieved, respectively. The excitation of Fe2+ ions in both samples by direct 2.94 μm as well as ∼4.05 μm radiation or indirectly via the Cr2+→ Fe2+ ions' energy transfer-based mechanism by 1.73 μm radiation was demonstrated. Based on the obtained results, the possibility of developing novel coherent laser systems in mid-IR regions (∼2.3-2.5 and ∼4.4-4.9 μm) based on AIIBVI matrices was presented.
研究了两种不同的中红外(mid-IR)固态晶体激光活性介质Cr2+、Fe2+:Zn1-xMnxSe和Cr2+、Fe2+:Zn1-xMgxSe,其中锰或镁离子的含量相似,x≈0.3,在低温下研究了三种不同的激发波长:波长为1.73μm的调Q Er:YLF激光器、2.94μm的调Q Er:YAG激光器以及在78K液氮温度下工作于4.05μm的增益开关Fe:ZnSe激光器。测量了光谱和激光特性的温度依赖性。根据激发波长和所选输出耦合器,两种激光系统都能够通过直接激发或通过Cr2+→Fe2+能量转移机制间接由Cr2+或Fe2+离子产生辐射。分别在78K温度下,在Cr2+、Fe2+:Zn1-xMnxSe和Cr2+、Fe2+:Zn1-xMgxSe(x≈0.3)晶体中实现了波长约为4.4μm和4.8μm的Fe2+离子激光产生。证明了通过直接的2.94μm以及4.05μm辐射或通过1.73μm辐射基于Cr2+→Fe2+离子能量转移机制间接激发两个样品中的Fe2+离子。基于所得结果,提出了基于AIIBVI基质开发中红外区域(2.3 - 2.5和4.4 - 4.9μm)新型相干激光系统的可能性。