65mJ室温Fe^2＋∶ZnSe中红外激光器

65mJ Fe^(2+):ZnSe Mid-Infrared Laser at Room Temperature

Fe^(2+):ZnSe晶体作为3~5μm波段极具潜力的中红外激光介质之一,在材料特性和转换效率等方面具有明显优势。对Fe^(2+):ZnSe晶体的吸收特性进行了研究,利用自制放电引发的非链式脉冲HF激光抽运Fe^(2+)掺杂浓度为4×1018 cm^(-3)、尺寸为10mm×10mm×5mm的Fe^(2+):ZnSe晶体,在室温下获得了65mJ的高能量Fe^(2+):ZnSe中红外激光输出,光光转换效率为31%,输出激光能量相对于晶体吸收抽运光能量的斜率效率可达37%。

As one of the most promising mid-infrared laser mediums in 3-5 μm wavelength region, Fe^2＋∶ZnSe crystal has many advantages in material property and conversion efficiency. The absorption characteristic of Fe^2＋∶ZnSe is investigated. A Fe^2＋∶ZnSe crystal with size of 10 mm×10 mm×5 mm and Fe^2＋ doping concentration of 4×10^18 cm^-3 is excited by a non-chain electric-discharge pulsed HF laser at room temperature. The maximum output energy reaches 65 mJ and the optical to optical conversion efficiency is 31%. The slope efficiency respecting to the absorbed pump energy is 37%.