【摘要】 高性能的3～5μm全固态中波红外激光器在激光医疗、激光雷达、环境监测和光电对抗等领域具有广阔的应用前景。目前,全固体激光器获得3～5μm中波红外激光的技术途径主要有3种:量子级联、直接泵浦增益介质及非线性频率转换。本文首先简要介绍了这3种技术途径产生中波红外激光的原理;其次,介绍了量子级联在实现高功率中波红外激光方面的研究现状和面临的瓶颈问题;再次,选取直接泵浦增益介质和非线性频率转换2种技术途径中的几种代表性晶体,论述了其在中红外激光平均输出功率、脉冲能量和脉冲宽度3个方面的研究成果;最后,对比了3种技术途径的优缺点,总结并展望了技术发展趋势。更多还原

【Abstract】 3-5 μm all-solid-state mid-infrared laser with high performance has wide promising applications in the fields of laser medicine, lidar, environmental monitoring, photoelectric countermeasure, and so on. At present, there are three main technical approaches to obtain mid-infrared laser, i.e. quantum cascade, direct-pumped gain medium, and nonlinear frequency conversion. Firstly, the principles of mid-infrared laser generated by the three ways are briefly introduced. Secondly, the research status and bottleneck of quantum cascade in realizing high power mid-infrared laser are demonstrated. Thirdly, several typical crystals of direct-pumped gain medium and nonlinear frequency conversion are selected, and the research progress on average output power, pulse energy, and pulse width of mid-infrared laser is discussed. Finally, the advantages and disadvantages of the three approaches are compared, and the development trend is prospected.更多还原